ARCH COMMUNICATIONS GROUP INC /DE/
DEFS14A, 2000-08-30
RADIOTELEPHONE COMMUNICATIONS
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<PAGE>   1

                            SCHEDULE 14A INFORMATION

          PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES
                              EXCHANGE ACT OF 1934

FILED BY THE REGISTRANT [X]       FILED BY A PARTY OTHER THAN THE REGISTRANT [ ]

--------------------------------------------------------------------------------

Check the appropriate box:
[ ] Preliminary Proxy Statement
[X] Definitive Proxy Statement
[ ] Definitive Additional Materials
[ ] Soliciting Material Pursuant to sec.240.14a-11(c) or sec.240.14a-12
[ ] Confidential, for Use of the Commission Only (as permitted by Rule
    14a-6(e)(2))

                        ARCH COMMUNICATIONS GROUP, INC.
 ------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)

 ------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

PAYMENT OF FILING FEE (CHECK THE APPROPRIATE BOX):
[ ] No fee required.
[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.

   1) Title of each class of securities to which transaction applies:

   2) Aggregate number of securities to which transaction applies:

   3) Per unit price or other underlying value of transaction computed pursuant
      to Exchange Act Rule 0-11 (Set forth the amount on which the filing fee is
      calculated and state how it was determined):

   4) Proposed maximum aggregate value of transaction:

   5) Total fee paid:

[X] Fee paid previously with preliminary materials.

[ ] Check box if any part of the fee is offset as provided by Exchange Act Rule
    0-11(a)(2) and identify the filing for which the offsetting fee was paid
    previously. Identify the previous filing by registration statement number,
    or the Form or Schedule and the date of its filing.

   1) Amount Previously Paid:

   2) Form, Schedule or Registration Statement No.:

   3) Filing Party:

   4) Date Filed:

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<PAGE>   2

                                  [ARCH LOGO]

                        ARCH COMMUNICATIONS GROUP, INC.
                        1800 WEST PARK DRIVE, SUITE 250
                        WESTBOROUGH, MASSACHUSETTS 01581

                    PROPOSED MERGER - YOUR VOTE IS IMPORTANT

                                PROXY STATEMENT

                        SPECIAL MEETING OF STOCKHOLDERS
                           TO BE HELD OCTOBER 5, 2000

     This proxy statement is furnished in connection with the solicitation of
proxies by Arch's board of directors for use at the special meeting of
stockholders to be held on Thursday, October 5, 2000 at 11:00 a.m. (local time)
at Hale and Dorr LLP, 31st Floor, 60 State Street, Boston, Massachusetts 02109,
and at any adjournments thereof.

     You are being asked to approve proposals relating to the proposed merger of
Arch and Paging Network, Inc. and related financial restructurings. A vote for
these proposals is, in effect, a vote for the merger. ARCH'S BOARD OF DIRECTORS
UNANIMOUSLY URGES YOU TO VOTE IN FAVOR OF ALL THE PROPOSALS.

     Through the merger, PageNet will become a wholly owned subsidiary of Arch
and their businesses will be combined. Also:

     - In the merger, PageNet's stockholders and noteholders will receive
       approximately 89,917,844 shares of Arch common stock as well as 80.5% of
       the common stock of Vast Solutions, Inc., a wholly owned PageNet
       subsidiary.

     - Concurrently with, but separate from the merger, Arch is offering to
       exchange up to 29,651,984 shares of its common stock for all of its
       outstanding 10 7/8% senior discount notes, in order to strengthen its
       balance sheet.

     Following the merger, Arch's current stockholders will hold at least 42.4%
of the combined company's stock. The rest of the combined company's stock will
be held by current noteholders of Arch and current stockholders and noteholders
of PageNet. The exact ownership percentages will depend on how many Arch notes
are exchanged.

     PageNet has filed a plan of reorganization as part of a bankruptcy
proceeding under chapter 11 of the U.S. Bankruptcy Code. The merger requires
approval of the plan by the bankruptcy court as well as approval of the
merger-related proposals by Arch's stockholders.

     The notice of meeting, this proxy statement and the enclosed proxy are
being mailed to stockholders on or about September 5, 2000.
<PAGE>   3

                              TRANSACTION DIAGRAM

     The following diagrams illustrate in general terms (1) the structure and
capital stock ownership percentages of Arch and PageNet prior to the
announcement of the exchange offer and the merger and (2) the structure and
capital stock ownership percentages of the combined company and Vast following
the exchange offer and the merger.

            [CURRENT STRUCTURE AND STOCK OWNERSHIP PERCENTAGE GRAPH]
<PAGE>   4

                        ARCH COMMUNICATIONS GROUP, INC.
                        1800 WEST PARK DRIVE, SUITE 250
                             WESTBOROUGH, MA 01581

                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                         TO BE HELD ON OCTOBER 5, 2000

To the Stockholders of
Arch Communications Group, Inc.:

     We will hold a special meeting of stockholders of Arch on Thursday, October
5, 2000 at 11:00 a.m., local time, at the offices of Hale and Dorr LLP, 60 State
Street, Boston, Massachusetts 02109, for the following purposes:

     1.  To consider and vote upon a proposal to issue shares of Arch's common
         stock, $.01 par value per share, pursuant to an agreement and plan of
         merger, dated as of November 7, 1999, as subsequently amended, among
         Arch, Paging Network, Inc. and a wholly owned subsidiary of Arch.

     2.  To consider and vote upon a proposal to amend Arch's restated
         certificate of incorporation to increase the number of authorized
         shares of Arch common stock from 150,000,000 to 300,000,000 shares.

     3.  To transact such other business as may properly come before the special
         meeting or any adjournments or postponements of the special meeting.

     Arch's board of directors has unanimously approved the merger and the
merger agreement and recommends that you vote FOR each of the proposals on which
you are entitled to vote. The approval of each of the first two proposals is
conditioned upon approval of the other proposal. Accordingly, a vote against
either of the first two proposals will have the same effect as a vote against
both.

     We have described the transactions under the merger agreement in more
detail in the accompanying proxy statement, which you should read in its
entirety before voting. A copy of the merger agreement is attached as Annex A to
the proxy statement.

     Only stockholders who hold shares of Arch stock at the close of business on
August 11, 2000 will be entitled to notice of and to vote at the special meeting
or any adjournment or postponement of the special meeting. The complete list of
Arch stockholders entitled to vote at the special meeting will be available for
examination, for purposes pertaining to the special meeting, by any stockholder
of Arch entitled to vote at the special meeting, at the principal executive
offices of Arch, 1800 West Park Drive, Suite 250, Westborough, Massachusetts
01581, for ten days prior to the special meeting.

     Holders of shares of Arch common stock, Class B common stock, Series C
preferred stock and Series D preferred stock will vote together as a single
class on the proposals. Each share of Arch common stock is entitled to one vote
on the matters presented, each share of Class B common stock is entitled to
1/100th of one vote, each share of Series C preferred stock is currently
entitled to 7.1576 votes and each share of Series D preferred stock is entitled
to 6.61318 votes.

     A quorum will exist for the proposals if a majority of the outstanding
shares of Arch common stock, Class B common stock, Series C preferred stock and
Series D preferred stock (calculated on an as-converted basis, assuming
conversion of all Class B common stock, Series C preferred stock and Series D
preferred stock, and voting together as a single class) entitled to vote at the
special meeting are present either in person or by proxy.

     Assuming a quorum is present, the approval of the issuance of shares of
Arch common stock pursuant to the merger agreement will require the affirmative
vote of the holders of a majority of the votes which are entitled to be cast by
the holders of shares present and voting. The adoption of the amendments to the
certificate of incorporation will require the affirmative vote of the holders of
a majority of the votes which
<PAGE>   5

are entitled to be cast by the holders of all shares of Arch common stock, Class
B common stock, Series C preferred stock and Series D preferred stock, whether
present or not at the special meeting. Holders of Arch common stock, Class B
common stock, Series C preferred stock and Series D preferred stock, do not have
rights of appraisal under Delaware law in connection with the merger.

     YOUR VOTE IS IMPORTANT REGARDLESS OF THE NUMBER OF SHARES YOU OWN. TO
ENSURE THAT YOUR SHARES ARE REPRESENTED AT THE SPECIAL MEETING, WE URGE YOU TO
COMPLETE, DATE AND SIGN THE ENCLOSED PROXY AND MAIL IT PROMPTLY IN THE
POSTAGE-PAID ENVELOPE PROVIDED WHETHER OR NOT YOU PLAN TO ATTEND THE SPECIAL
MEETING IN PERSON. YOU MAY REVOKE YOUR PROXY IN THE MANNER DESCRIBED IN THE
PROXY STATEMENT AT ANY TIME BEFORE IT HAS BEEN VOTED AT THE SPECIAL MEETING. YOU
MAY VOTE AT THE SPECIAL MEETING EVEN IF YOU HAVE RETURNED A PROXY.

                                             By order of the Board of Directors,

                                             /s/ C. Edward Baker, Jr.

                                             C. Edward Baker, Jr.
                                             Chairman of the Board and
                                             Chief Executive Officer

September 5, 2000
Westborough, MA

                              WHAT YOU NEED TO DO

IF YOU ARE AN ARCH STOCKHOLDER, you only need to vote your shares. The only
document that you will receive is this proxy statement. To vote your shares,
please use the enclosed proxy card. Please read the instructions on the proxy
card and fill out the proxy card accordingly. To approve the proposals relating
to the merger, you must vote "FOR" each proposal.

IF YOU ARE AN ARCH STOCKHOLDER AND AN ARCH NOTEHOLDER, you will need to:

        -  vote your shares; and

        -  respond to Arch's note exchange offer.

You will receive this proxy statement and a separate note exchange prospectus
from Arch. To vote your shares, please use the enclosed proxy card. Please read
the instructions on the enclosed proxy card included in the proxy statement and
fill out the proxy card accordingly. To approve the proposals relating to the
merger, you must vote "FOR" each proposal. Also, in order to respond to Arch's
note exchange offer, please read the instructions on the letter of transmittal
included in the note exchange prospectus and fill out the letter of transmittal
accordingly.

                                        2
<PAGE>   6

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
Summary...............................     1
  The Merger..........................     1
  Arch and PageNet....................     3
Risk Factors..........................     5
   Risks Related to the Merger and an
     Investment in Arch's Common
     Stock............................     5
   Risks Related to PageNet's
     Business.........................     7
   Risks Related to PageNet's
     Bankruptcy Filing................     8
Forward-Looking Statements............     8
Selected Pro Forma Financial and
  Operating Data......................     9
The Merger............................    11
  General.............................    11
  Background of the Merger............    11
  Arch's Reasons for the Merger;
     Recommendation of Arch's Board of
     Directors........................    16
  Opinion of Financial Advisor to
     Arch.............................    18
  Interests of Certain Persons in the
     Merger...........................    22
  Treatment of PageNet's Common
     Stock............................    24
  Stock Ownership in the Combined
     Company..........................    25
  Arch's Exchange Offer...............    25
  Regulatory Approvals................    26
  Material Federal Income Tax
     Considerations...................    26
  Accounting Treatment of the
     Merger...........................    26
  Quotation on Nasdaq National Market
     System...........................    26
  No Appraisal Rights.................    26
The Merger Agreement..................    27
  Structure of the Merger.............    27
  The Exchange Ratio and Treatment of
     PageNet Common Stock.............    27
  Exchange Procedures.................    27
  Treatment of PageNet Stock
     Options..........................    27
  Representations and Warranties......    28
  Covenants...........................    29
  Conditions to Completion of the
     Merger...........................    31
  Termination of the Merger
     Agreement........................    32
  Termination Fee.....................    34
  Modification or Amendment of the
     Merger Agreement.................    35
</TABLE>

<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
PageNet's Bankruptcy Plan.............    36
  Classification of Claims and Equity
     Interests under the PageNet
     Bankruptcy Plan..................    36
Material Federal Income Tax
  Considerations......................    39
Capitalization........................    41
Unaudited Pro Forma Consolidated
  Financial Data of the Combined
  Company.............................    42
Unaudited Pro Forma Condensed
  Consolidated Financial Statements...    45
Notes to Unaudited Pro Forma Condensed
  Consolidated Financial Statements...    49
Selected Historical Consolidated
  Financial and Operating
  Data -- Arch........................    53
Arch Management's Discussion and
  Analysis of Financial Condition and
  Results of Operations...............    56
Selected Historical Consolidated
  Financial and Operating
  Data -- PageNet.....................    72
PageNet Management's Discussion and
  Analysis of Financial Condition and
  Results of Operations...............    76
Market Price Information and Dividend
  Policy..............................    91
  Comparative Price Information.......    91
  Dividend Policy.....................    91
Comparative Historical and Unaudited
  Pro Forma Per Share Data............    93
Industry Overview.....................    94
  Regulation..........................    95
Arch's Business.......................    99
  Wireless Messaging Services,
     Products and Operations..........    99
  Networks and Licenses...............   101
  Subscribers and Marketing...........   102
  Sources of Equipment................   103
  Competition.........................   103
  Employees...........................   104
  Trademarks..........................   104
  Properties..........................   104
  Litigation..........................   104
  The Company.........................   104
Arch's Management.....................   105
Arch's Principal Stockholders.........   112
</TABLE>

                                        i
<PAGE>   7

<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
PageNet's Business....................   116
PageNet's Management..................   122
The Combined Company..................   130
Description of Indebtedness...........   133
Arch's Special Meeting................   138
Stockholder Proposals.................   140
Where You Can Find More Information...   141
Index to Financial Statements.........   F-1
</TABLE>

<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
Annex A -- Agreement and Plan of
  Merger..............................   A-1
Annex B -- Opinion of Bear Stearns &
  Co., Inc............................   B-1
Annex C -- Arch Credit Facilities Term
  Sheet...............................   C-1
Annex D -- Unaudited Combined Company
  Projected Balance Sheets............   D-1
</TABLE>

                                       ii
<PAGE>   8

                                    SUMMARY

     This summary highlights selected information contained elsewhere in this
proxy statement. It may not contain all of the information that is important to
you. We urge you to read the entire proxy statement, including "Risk Factors",
and all of the information incorporated by reference into the proxy statement.

                                   THE MERGER

STRUCTURE OF THE MERGER AND RELATED TRANSACTIONS (PAGE 11, ANNEX A)

     Through the merger, PageNet will become a wholly owned subsidiary of Arch,
the two companies' businesses will be combined and investors in PageNet will
become investors in Arch.

     Arch and PageNet originally negotiated an agreement and plan of merger and
signed it on November 7, 1999. On July 14, 2000, before the merger could take
place, creditors of PageNet commenced a proceeding against PageNet under chapter
11 of the Bankruptcy Code. PageNet has filed a bankruptcy plan in order to
implement the merger on modified terms agreed to by Arch and PageNet. The merger
agreement, as amended, is attached to this proxy statement as Annex A.

     In the merger, each outstanding share of PageNet's common stock will be
exchanged for 0.08365112 shares of Arch's common stock. In order to strengthen
the balance sheet of the combined company, the merger will be accompanied by a
recapitalization of Arch and PageNet involving the exchange of common stock for
outstanding debt. PageNet's bankruptcy plan provides for the exchange of a total
of approximately 89,917,844 shares of Arch's common stock for all of PageNet's
outstanding senior subordinated notes as well as all of PageNet's outstanding
common stock. As required by the merger agreement, Arch is offering to exchange
a total of 29,651,984 shares of its common stock for all of its outstanding
10 7/8% senior discount notes that were outstanding on November 7, 1999. Arch
has already exchanged shares of its common stock for a significant portion of
these discount notes so that approximately $159.6 million in accreted value of
discount notes remained outstanding at June 30, 2000.

     Confirmation of the bankruptcy plan and implementation of the merger and
Arch's exchange offer will result in the issuance of a total of approximately
119,569,828 new shares of Arch common stock to PageNet stockholders, PageNet
noteholders and Arch noteholders if all Arch discount notes are exchanged. On
November 5, 1999, the last trading day before the public announcement of the
proposed merger, Arch's common stock had a closing price of $6.8125 per share.
On August 29, 2000, the last trading day for which information was available
prior to the first mailing of this proxy statement, Arch's common stock had a
closing price of $5.00 per share.

     In connection with the merger, 80.5% of the total equity of PageNet's
subsidiary, Vast, will be issued to PageNet's current stockholders and
noteholders and the combined company will hold the remaining 19.5% of Vast's
equity.

STOCK OWNERSHIP AND GOVERNANCE FOLLOWING THE MERGER (PAGE 25)

     If all of the outstanding Arch notes are exchanged, the merger and the
related transactions will result in Arch's outstanding common stock being held

     - 42.4% by Arch's existing stockholders, including former Arch noteholders
       who have become Arch stockholders in the past several months by
       exchanging their notes for stock in negotiated transactions;

     - 6.5% by the existing holders of Arch's 10 7/8% senior discount notes;

     - 46.1% by the existing holders of PageNet's senior subordinated notes; and

     - 5.0% by the existing holders of PageNet's common stock.

                                        1
<PAGE>   9

     The capitalization of the combined company following the merger is expected
to be leveraged, although less heavily leveraged than Arch's current
capitalization. The merger and Arch's exchange offer will reduce overall debt by
approximately $1.3 billion and increase stockholders equity by approximately
$1.7 billion, if all Arch discount notes are exchanged.

     After the merger, the Arch board of directors will consist of 12 directors.
Six directors will be designated by the current Arch directors and three
directors will be designated by the current PageNet directors. Each of the three
largest holders of PageNet notes being exchanged for shares of Arch common stock
may designate one director. To the extent any of these three largest holders do
not designate directors, the Arch directors will designate additional directors.

REQUIRED STOCKHOLDER APPROVALS; STOCKHOLDER MEETING (PAGE 135)

     Various matters that are necessary in order to effect the merger will
require obtaining the affirmative vote of the holders of a majority of the
combined voting power of all classes of Arch's outstanding capital stock. A
meeting of Arch's stockholders will be held on October 5, 2000. Officers and
directors of Arch and their affiliates who beneficially own a total of
approximately 20.1% of the outstanding voting power of Arch have indicated an
intention to vote in favor of all matters related to the merger.

BACKGROUND OF MERGER; RECOMMENDATION TO STOCKHOLDERS (PAGE 11)

     THE ARCH BOARD OF DIRECTORS HAS UNANIMOUSLY VOTED TO APPROVE THE MERGER
AGREEMENT AND THE MERGER. THE BOARD OF DIRECTORS BELIEVES THAT THE MERGER IS
ADVISABLE AND IN THE BEST INTEREST OF ARCH'S STOCKHOLDERS AND RECOMMENDS THAT
ARCH'S STOCKHOLDERS VOTE TO APPROVE ALL MATTERS CONCERNING THE MERGER AND
RELATED TRANSACTIONS.

OPINION OF FINANCIAL ADVISOR (PAGE 18)

     In deciding to approve the merger, Arch's board of directors received an
opinion from its financial advisor as to the fairness, from a financial point of
view, of the exchange ratio to be used in the merger to Arch and its
stockholders. The full text of the opinion of Bear, Stearns & Co., Inc. to Arch
is attached as Annex B to this proxy statement.

     Bear Stearns' opinion should be read carefully in its entirety. The opinion
is addressed to Arch's board of directors and does not constitute a
recommendation to any stockholders with respect to matters relating to the
merger or any related matter. The engagement letter between Bear Stearns and
Arch provides that part of Bear Stearns' fees will not be paid unless the merger
takes place. Regardless of whether the merger is consummated, Bear Stearns will
be reimbursed for reasonable fees and disbursements of counsel and reasonable
travel and other out-of-pocket expenses and indemnified to the full extent of
the law against certain liabilities, including liabilities under the federal
securities laws, arising out of its engagement or the merger.

CONDITIONS TO THE MERGER (PAGE 31)

     The merger and Arch's exchange offer are conditioned upon:

     - approval of the transaction by Arch's stockholders;

     - entry of a final confirmation order by the bankruptcy court confirming
       the bankruptcy plan;

     - receipt of all necessary governmental approvals;

     - PageNet's receipt of a legal opinion to be rendered at the closing of the
       merger regarding the treatment of the merger as a tax-free transaction;
       and

     - other customary contractual conditions specified in the merger agreement.

                                        2
<PAGE>   10

PAGENET'S BANKRUPTCY PLAN (PAGE 36)

     PageNet and all of its wholly-owned domestic subsidiaries, except for Vast,
are parties to a chapter 11 proceeding. On July 25, 2000, PageNet filed its
bankruptcy plan as a means to implement the merger and recapitalization. PageNet
is soliciting the approval of its noteholders and its stockholders in favor of
its bankruptcy plan in the manner required by chapter 11. The bankruptcy plan
provides for the merger of PageNet into Arch and the related transactions on the
same terms as are provided in the amended merger agreement.

     If the bankruptcy plan is not confirmed, PageNet will evaluate its
strategic alternatives while under the protection of the bankruptcy court. These
alternatives could include, but are not limited to, a stand-alone restructuring,
transactions with other merger partners, or liquidation.

NO SOLICITATION OF ALTERNATIVE OFFERS; TERMINATION FEE (PAGES 29 AND 34)

     Both Arch and PageNet have agreed not to solicit or encourage any proposal
from a third party involving an acquisition, business combination or other
similar proposal, prior to the merger, subject to their boards of directors'
fiduciary obligations to recommend any superior proposal to their stockholders
or creditors. Either Arch or PageNet may be required to pay a termination fee of
$40.0 million if the merger agreement is terminated after one party pursues an
alternative offer. PageNet's obligations under these provisions have been
approved by the bankruptcy court.

TERMINATION OF THE MERGER AGREEMENT (PAGE 32)

     Arch and PageNet can mutually agree to terminate the merger agreement.
Either Arch or PageNet can terminate the merger agreement if:

     - the other party breaches and fails to cure any material representation,
       warranty or covenant in the merger agreement;

     - the merger does not take place by January 30, 2001; or

     - the Arch stockholders do not approve the proposals relating to the
       merger.

ACCOUNTING TREATMENT (PAGE 26)

     Arch will account for the merger using the purchase method of accounting,
which means that the assets and liabilities of PageNet, including intangible
assets, will be recorded at their fair value and the results of operations of
PageNet will be included in Arch's results beginning on the date of acquisition.

MATERIAL FEDERAL INCOME TAX CONSIDERATIONS (PAGE 39)

     Arch's tax counsel is of the opinion that for federal income tax purposes,
neither Arch nor its stockholders will recognize gain or loss as a result of the
merger.

ARCH STOCKHOLDERS DO NOT HAVE APPRAISAL RIGHTS (PAGE 26)

     Arch stockholders do not have appraisal rights in connection with the
merger.

                                ARCH AND PAGENET

     Arch.  Arch is a leading provider of wireless messaging services in the
United States, with approximately 6.7 million units in service as of June 30,
2000. Arch primarily provides traditional paging services which enable
subscribers to receive messages on their pagers composed entirely of numbers,
such as a phone number, or on some pagers, numbers and letters which enable the
subscriber to receive text messages. Both kinds of services are commonly
referred to as messaging services. Arch has also begun to market and sell
"advanced" messaging services which enable subscribers to receive
acknowledgements that their messages were delivered or to respond to messages.
Arch also offers enhanced or complementary
                                        3
<PAGE>   11

wireless messaging services, such as stock quotes, news and other wireless
information delivery services, voice mail, personalized greeting, message
storage and retrieval, equipment loss protection and equipment maintenance.
Arch's principal office is located at 1800 West Park Drive, Suite 250,
Westborough, Massachusetts 01581. Arch's telephone number is (508) 870-6700.
Arch's common stock is traded on the Nasdaq National Market under the symbol
"APGR."

     PageNet. PageNet is a provider of wireless messaging services throughout
the United States and Canada, with approximately 7.9 million units in service as
of June 30, 2000. PageNet primarily provides traditional paging services.
PageNet has also begun to market and sell "advanced" messaging services. PageNet
also offers enhanced or complementary wireless communications services, such as
stock quotes, news and other wireless information delivery services, voice mail
and personalized greetings. Through its wholly owned subsidiary Vast, PageNet is
commencing operations that use wireless technology to connect businesses with
their employees, customers and remote assets, such as vending machines,
automobiles and storage tanks. PageNet's principal office is located at
Corporate Centre, 14911 Quorum Drive, Dallas, Texas 75240. PageNet's telephone
number is (972) 801-8000. PageNet's common stock was traded on the Nasdaq Small
Cap Market under the symbol "PAGE" until July 14, 2000, when trading was
suspended due to PageNet's chapter 11 proceeding. Trading of PageNet's common
stock commenced in the over-the-counter market on July 27, 2000 under the symbol
"PAGE."

     Arch's web site, www.arch.com, and PageNet's website, www.pagenet.com, are
not part of this proxy statement. Arch has supplied all information about Arch
contained in this proxy statement, and PageNet has supplied all information
about PageNet and Vast.

                                        4
<PAGE>   12

                                  RISK FACTORS

     The proposed merger involves risks which are in addition to the risks of
your current investment in Arch's business. Those existing risks are described
under "Arch Management's Discussion and Analysis of Financial Condition and
Results of Operations -- Factors Affecting Future Operating Results."

RISKS RELATED TO THE MERGER

  The exchange ratio used in connection with the merger may be unfavorable to
  Arch stockholders. The exchange ratio is fixed, and will not be adjusted to
  reflect changes in the market price of Arch's common stock.

     The exchange ratio used in connection with the merger, which requires the
exchange of 89,917,844 shares of Arch common stock for all of PageNet's common
stock and senior subordinated notes, was determined by negotiations between Arch
and PageNet, after consultation with their respective financial advisors. The
exchange ratio is not necessarily related to trading prices for Arch's or
PageNet's common stock or senior subordinated notes or other recognized criteria
of value for common stock or notes such as assets, net worth, cash flow coverage
or results of operations. Arch may not terminate the merger agreement or
resolicit the votes of its stockholders solely because of changes in the trading
price of Arch's common stock. A change in trading prices will not result in any
change in the exchange ratio.

  Challenges involved in integrating Arch and PageNet may strain Arch's
  capacities and may prevent the combined company from achieving intended
  synergies

     Arch may not be able to successfully integrate PageNet's operations. The
combination of the two companies will require, among other things, coordination
of administrative, sales and marketing, customer billing and services
distribution and accounting and finance functions and expansion of information
and management systems. The difficulties of such integration will initially be
increased by the need to coordinate geographically separate organizations and to
integrate personnel with disparate business backgrounds and corporate cultures
and by the fact that PageNet has suspended a significant restructuring of its
own operations.

     The integration process could cause the disruption of the activities of the
two businesses that are being combined. Arch may not be able to retain key
employees of PageNet. The process of integrating the businesses of Arch and
PageNet may require a disproportionate amount of time and attention of Arch's
management and financial and other resources of Arch. Even if integrated in a
timely manner, there is no assurance that Arch will operate smoothly or that it
will fulfill management's objective of achieving cost reductions and synergies.
Until integration is complete, PageNet's business will continue to operate with
some autonomy. This degree of autonomy may blunt the implementation of Arch's
operating strategy.

  PageNet's operations may be disrupted by a loss of customers, vendors and
  employees as a result of PageNet's bankruptcy filing

     Some customers and potential customers and vendors may be reluctant to do
business with PageNet because it is operating in bankruptcy. Any significant
loss of customers or vendors, or other deterioration in PageNet's business could
adversely effect PageNet's revenues and operations, which, in turn, would
adversely impact Arch if the merger is consummated. In addition, PageNet's level
of employee turnover is likely to increase as a result of the bankruptcy filing.

  The merger may cost more than Arch and PageNet anticipate, due to
  unforeseeable cost overruns and delays. This would create an additional
  financial burden on the combined company

     Arch and PageNet estimate that they will incur total direct transaction and
closing costs of approximately $70.0 million associated with the merger and
related transactions. This amount is a preliminary estimate and is therefore
subject to change. It is quite possible that Arch will incur significant

                                        5
<PAGE>   13

additional unforeseen costs in connection with the merger which will impose an
added burden on the combined company.

  The combined company's financial projections in Annex D are based upon a
  number of assumptions and estimates. These assumptions and estimates may be
  incorrect and as a result the combined company may not achieve the financial
  results, including the level of cash flow, that management projects

     The managements of PageNet and Arch have jointly prepared the combined
company financial projections contained in Annex D to this proxy statement. The
projections are contained in this proxy statement solely because they have been
publicly disclosed in connection with PageNet's chapter 11 proceeding. These
projections assume that the merger and related transactions will be implemented
in accordance with their current terms and present the projected effects of the
bankruptcy plan on future operations if the plan, the merger and the Arch
exchange offer are consummated. These projections are based upon a number of
other assumptions and estimates. For example, these projections assume that 100%
of Arch discount notes will be tendered and accepted in the exchange offer.
However, the exchange of Arch notes is not a condition to the merger. If some of
the notes remain outstanding, Arch will be more leveraged and will have higher
interest payments than indicated in the projections. The assumptions and
estimates underlying the projections are inherently uncertain and are subject to
significant business, economic and competitive risks and uncertainties.
Accordingly, future financial condition and results of operations of the
combined company following the merger may vary significantly from those set
forth in the projections. Consequently, the projections should not be regarded
as a representation by PageNet, Arch, their advisors or any other person that
the projections will be achieved. See "Forward-Looking Statements." If the
projected results are not achieved, Arch's operating losses may be larger and
the trading price of Arch's common stock may suffer.

  The pro forma financial statements are also based upon a number of assumptions
  and estimates that may be incorrect and as a result may not be a good
  indication of future financial results for the combined company

     The pro forma condensed consolidated financial statements included in this
proxy statement are based on the same assumptions and estimates noted above for
the combined company financial projections, as well as other assumptions and
estimates. For example, the pro forma financial statements value PageNet's
assets based on the number of shares of Arch common stock to be issued in the
merger at an assumed trading value of $6.02 per share, which was the average
closing price of Arch common stock for the four trading days prior to and the
four trading days following the announcement of the merger. Trading prices for
common stock fluctuate, and no prediction can be made as to what prices will
prevail before or after the merger takes place. On August 29, 2000, the closing
market price of Arch's common stock was $5.00. See "Unaudited Pro Forma
Condensed Consolidated Financial Statements." If trading prices after the merger
are less than $6.02 per share, the recorded value of Arch's assets will not be
modified, and their recorded value will be greater than their value would be if
that value were to be based on trading prices after the merger. As a result, the
pro forma financial results may not be a good indication of the financial
condition or the results of operations that would be recorded by the combined
company if a different price per share had been used.

  Amortization charges from the PageNet merger and Arch's earlier acquisition of
  MobileMedia may occur sooner than management expects, resulting in earlier
  decreases in earnings

     Under purchase accounting treatment for the PageNet merger and the
acquisition of MobileMedia in 1999, Arch must record a substantial amount of
goodwill and other intangible assets. This will result in substantial
amortization charges to the consolidated income of Arch over the useful lives of
those assets. Arch estimates the amount of those charges will total
approximately $73.2 million per year for ten years. However, actual charges in
the early years could be greater, and could adversely affect reported results of
operations more than is currently anticipated, if the underlying assets are
impaired or if the useful lives of the assets are less than currently estimated.

                                        6
<PAGE>   14

  The merger will probably eliminate corporate tax benefits that Arch might
  otherwise utilize in the future

     It is anticipated that the merger and related transactions will result in
the elimination of substantially all of the tax benefit of net operating loss
carryforwards and certain other tax attributes available to PageNet and Arch,
and also will result in some out-of-pocket tax liability. See "Material Federal
Income Tax Considerations." If Arch generates any taxable income in the future,
the net operating loss carryforwards will no longer be available to shelter it.

  The merger may not take place. If it does not take place, Arch will incur
  substantial costs and will not enjoy the anticipated benefits of the merger

     If the merger does not take place, the contemplated benefits of the merger
will not be realized, and Arch stockholders and noteholders will retain their
interest as investors in a company which will not enjoy the anticipated benefits
of the merger despite incurring substantial transaction costs. If the merger
does not take place after Arch pursues an alternative acquisition proposal, Arch
may be required to pay a $40 million termination fee to PageNet.

RISKS RELATED TO PAGENET'S BUSINESS

     PageNet faces many of the same risks that Arch faces. See "Arch
Management's Discussion and Analysis of Financial Condition and Results of
Operations -- Factors Affecting Future Operating Results." In addition, PageNet
is subject to these particular risks:

  Recent declines in PageNet's units in service are expected to continue or even
  accelerate; this trend will impair PageNet's financial results

     PageNet had approximately 7,858,000 units in service at June 30, 2000, down
from its high of approximately 10,604,000 units in service at June 30, 1998.
PageNet has had a net reduction in the number of units in service during each of
the eight previous quarters ended June 30, 2000, and the amount of such net
reduction has increased during each quarter. Units in service are expected to
continue to decline in the second half of 2000. The net reduction of units in
service with subscribers is due to a combination of factors, including customer
service problems, the impact of various price increases by PageNet, increased
sales activity by competitors since the merger announcement, and an increasing
number of paging customers who are choosing cellular, PCS and other mobile phone
services instead of paging services. The sales and marketing efforts associated
with attracting new subscribers are substantial compared to the costs of
providing service to existing customers. Because the wireless messaging business
is characterized by high fixed costs, cancellations directly and adversely
affect earnings before interest, income taxes, depreciation and amortization.
The continued failure to reverse this trend of accelerating customer
cancellations will have a material adverse effect on PageNet's business.

  The restructuring of PageNet's back office field operations has been suspended
  and will not result in the cost savings that were originally contemplated; it
  is uncertain whether or when the consolidation will resume

     Beginning in 1998, PageNet began restructuring its decentralized back
office field operations into centralized processing facilities. In January 2000,
PageNet suspended future conversions of its back office field operations, at
which time PageNet had converted 100% of its customer units placed in service
indirectly through PageNet's resellers, and approximately 50% of its directly
marketed customer units, to its centralized facilities. The suspension of future
conversions, combined with the impact of the contemplated merger on operations,
make it difficult for PageNet to determine the amount of potential cost savings
resulting from the restructuring initiative and will make it difficult for
PageNet to realize the full benefits intended to be achieved when restructuring
efforts began.

                                        7
<PAGE>   15

RISKS RELATED TO THE BANKRUPTCY FILING

  If the bankruptcy plan is not confirmed, the merger will not be consummated.

     PageNet's ability to have its plan of reorganization confirmed is
uncertain. Failure to have the plan confirmed would prevent the merger from
taking place. Furthermore, if the bankruptcy plan is not confirmed by December
31, 2000 the merger might not be consummated and implemented.

  Unless the bankruptcy plan and the merger agreement are approved by the
  bankruptcy court, they may not be binding on PageNet.

     Only some of the provisions of the merger agreement, such as the
termination fees payable by Arch and PageNet, have been approved to the
bankruptcy court. The remaining provisions may not be binding upon PageNet, in
its capacity as a debtor in possession under the Bankruptcy Code, unless the
merger agreement is assumed by PageNet under the Bankruptcy Code.

     The bankruptcy plan provides that the merger agreement is to be assumed by
PageNet, thus becoming enforceable, in connection with confirmation of the
bankruptcy plan. As discussed in this proxy statement, there can be no assurance
that the necessary confirmation requirements will be satisfied or that, if they
are satisfied, the bankruptcy court will confirm the bankruptcy plan.

                           FORWARD-LOOKING STATEMENTS

     This proxy statement contains forward-looking statements that are made
under the safe harbor provisions of the Private Securities Litigation Reform Act
of 1995. You should consider any statements that are not statements of
historical fact to be forward-looking statements. These include statements to
the effect that Arch, PageNet, or any of their affiliates, management or
directors "believe", "expect", "anticipate", "plan" and similar expressions. A
number of important factors could cause actual results to differ materially from
those expressed in any forward-looking statements. See "Risk Factors" and "Arch
Management's Discussion and Analysis of Financial Condition and Results of
Operations -- Factors Affecting Future Operating Results." If new information
becomes available or other events occur in the future, Arch will update any
forward-looking statements to the extent required by the securities laws, but
not otherwise.

                                        8
<PAGE>   16

                SELECTED PRO FORMA FINANCIAL AND OPERATING DATA

     The following unaudited selected pro forma financial and operating data of
the combined company gives effect to the following transactions as if they were
consummated as of June 30, 2000 with respect to the unaudited pro forma balance
sheet, except for Arch's acquisition of MobileMedia which closed prior to
December 31, 1999, and on January 1, 1999 with respect to the unaudited pro
forma statements of operations:

     - Arch's acquisition of MobileMedia, on June 3, 1999;

     - the exchange of $159.6 million (accreted value at June 30, 2000) of Arch
       discount notes for 11.4 million shares of Arch common stock in Arch's
       exchange offer;

     - the conversion of $44.0 million of Arch Series D preferred stock into
       approximately 6.6 million shares of Arch common stock upon completion of
       the merger; and

     - Arch's merger with PageNet.

     The following selected pro forma financial information should be read in
conjunction with the unaudited pro forma condensed consolidated financial
statements and notes. The financial impact of expected operational cost
synergies resulting from the merger of PageNet and Arch and Arch's acquisition
of MobileMedia is excluded from this presentation.

     The pro forma financial and operating data is presented for illustrative
purposes only and does not necessarily predict the operating results or
financial position that would have occurred if the merger of PageNet and Arch
and Arch's acquisition of MobileMedia had been consummated as of the dates
indicated above. Nor does it predict the future operating results or financial
position of Arch following the merger and the MobileMedia acquisition.

     Adjusted earnings before interest, income taxes, depreciation and
amortization, as determined by Arch, does not reflect restructuring charge,
provision for asset impairment and bankruptcy related expenses; consequently
adjusted earnings before interest, income taxes, depreciation and amortization
may not necessarily be comparable to similarly titled data of other wireless
communications companies. Earnings before interest, income taxes, depreciation
and amortization is commonly used by analysts and investors as a principal
measure of financial performance in the wireless communications industry.
Earnings before interest, income taxes, depreciation and amortization is also
one of the primary financial measures used to calculate whether Arch and its
subsidiaries are in compliance with financial covenants under their debt
agreements. These covenants, among other things, limit the ability of Arch and
its subsidiaries to: incur additional indebtedness, make investments, pay
dividends, grant liens on its assets, merge, sell or acquire assets, repurchase
or redeem capital stock, incur capital expenditures and repay certain
indebtedness. Earnings before interest, income taxes, depreciation and
amortization is also one of the financial measures used by analysts to value
Arch. Therefore Arch management believes that the presentation of earnings
before interest, income taxes, depreciation and amortization provides relevant
information to investors. Earnings before interest, income taxes, depreciation
and amortization should not be construed as an alternative to operating income
or cash flows from operating activities as determined in accordance with
generally accepted accounting principles or as a measure of liquidity. Amounts
reflected as earnings before interest, income taxes, depreciation and
amortization or adjusted earnings before interest, income taxes, depreciation
and amortization are not necessarily available for discretionary use as a result
of restrictions imposed by the terms of existing indebtedness and limitations
imposed by applicable law upon the payment of dividends or distributions, among
other things.

                                        9
<PAGE>   17

     Adjusted earnings before interest, income taxes, depreciation and
amortization margin is calculated by dividing Arch's adjusted earnings before
interest, income taxes, depreciation and amortization by total revenues less
cost of products sold. Earnings before interest, income taxes, depreciation and
amortization margin is a measure commonly used in the wireless communications
industry to evaluate a company's earnings before interest, income taxes,
depreciation and amortization relative to total revenues less cost of products
sold as an indicator of the efficiency of a company's operating structure.

<TABLE>
<CAPTION>
                                                                           PRO FORMA
                                                              ------------------------------------
                                                                                      SIX MONTHS
                                                                  YEAR ENDED            ENDED
                                                              DECEMBER 31, 1999     JUNE 30, 2000
                                                              ------------------    --------------
                                                                 (DOLLARS IN THOUSANDS, EXCEPT
                                                              PERCENTAGE, PER SHARE AND UNIT DATA)
<S>                                                           <C>                   <C>
STATEMENT OF OPERATIONS DATA:
Service, rental and maintenance revenues....................     $ 1,651,502         $   746,933
Product sales...............................................         152,017              67,555
                                                                 -----------         -----------
Total revenues..............................................       1,803,519             814,488
Cost of products sold.......................................        (113,891)            (53,404)
                                                                 -----------         -----------
                                                                   1,689,628             761,084
Operating expenses:
Service rental and maintenance..............................         440,534             202,964
Selling.....................................................         204,777              84,700
General and administrative..................................         573,294             258,032
Depreciation and amortization...............................         682,403             338,685
Restructuring charge........................................         (25,731)                 --
Provision for asset impairment..............................          17,798                  --
Bankruptcy related expenses.................................          14,938                  --
                                                                 -----------         -----------
Operating income (loss).....................................        (218,385)           (123,297)
                                                                 -----------         -----------
Interest and other income (expense).........................        (216,407)           (105,324)
                                                                 -----------         -----------
Income (loss) before income tax provision...................        (434,792)           (228,621)
Income tax provision........................................             209                  --
                                                                 -----------         -----------
Net income (loss)...........................................     $  (435,001)        $  (228,621)
                                                                 ===========         ===========
Basic/diluted income (loss) per share.......................     $     (2.56)        $     (1.33)
                                                                 ===========         ===========
OTHER OPERATING DATA:
Adjusted earnings before interest, income taxes,
  depreciation and amortization.............................     $   471,023         $   215,388
Adjusted earnings before interest, income taxes,
  depreciation and amortization margin......................              28%                 28%

Capital expenditures, excluding acquisitions................     $   354,808         $    79,410
Cash flows provided by operating activities.................         325,191             159,384
Cash flows used in investing activities.....................        (894,682)            (82,261)
Cash flows provided by financing activities.................         717,678              27,937
Units in service at end of period(1)........................      15,500,000          14,030,000
</TABLE>

<TABLE>
<CAPTION>
                                                                                       AS OF
                                                                                   JUNE 30, 2000
                                                                                   -------------
<S>                                                           <C>                  <C>
BALANCE SHEET DATA:
Current assets.................................................................     $   259,020
Total assets...................................................................       2,853,128
Long-term debt, less current maturities........................................       1,818,890
Stockholders' equity...........................................................         596,755
</TABLE>

---------------

(1) Units in service is calculated by adding the Arch and PageNet units in
    service less an elimination for intercompany units in service.

     The following table reconciles net income (loss) to the presentation of
Arch's pro forma adjusted earnings before interest, income taxes, depreciation
and amortization:

<TABLE>
<CAPTION>
                                                                                    SIX MONTHS
                                                                 YEAR ENDED            ENDED
                                                              DECEMBER 31, 1999    JUNE 30, 2000
                                                              -----------------    -------------
<S>                                                           <C>                  <C>
Net income (loss)...........................................     $  (435,001)       $  (228,621)
Interest and other (income) expense.........................         216,407            105,324
Income tax provision........................................             209                 --
Depreciation and amortization...............................         682,403            338,685
Provision for asset impairment..............................          17,798                 --
Restructuring and bankruptcy expenses.......................         (10,793)                --
                                                                 -----------        -----------
Adjusted earnings before interest, income taxes,
  depreciation and amortization.............................     $   471,023        $   215,388
                                                                 ===========        ===========
</TABLE>

                                       10
<PAGE>   18

                                   THE MERGER

GENERAL

     Arch and PageNet have agreed to merge on the terms set forth in the merger
agreement. Through the merger, PageNet will become a wholly owned subsidiary of
Arch. The merger will be accompanied by a recapitalization of PageNet and Arch
resulting from the exchange of debt for common stock in the Arch exchange offer
and under the PageNet bankruptcy plan.

     The merger agreement provides that:

     - PageNet will merge with a wholly owned subsidiary of Arch. In the merger,
       each share of PageNet common stock will be converted into 0.08365112
       shares of Arch common stock. On November 5, 1999, the last trading day
       before the public announcement of the proposed merger, PageNet's common
       stock had a closing price of $0.96875 per share, which exceeded the
       closing price equivalent of $0.56987 for 0.08365112 shares of Arch common
       stock. On August 29, 2000, the last day for which information was
       available prior to the first mailing of this proxy statement, PageNet's
       common stock had a closing price of $0.28 per share compared to $0.41826
       for 0.08365112 shares of Arch common stock.

     - In connection with the merger, approximately 81,197,837 shares of Arch
       common stock and 60.5% of the equity interest in Vast will be exchanged
       for all of PageNet's outstanding senior subordinated notes.

     - PageNet will distribute 20.0% of the equity interest in Vast to the
       holders of PageNet common stock in connection with the merger.

     - Concurrently with, but separate from the merger, Arch has agreed to
       conduct the Arch exchange offer, offering to exchange 66.1318 shares of
       Arch common stock for each $1,000 principal amount at maturity of its
       discount notes. During 2000, Arch has issued 11,640,321 shares of Arch
       common stock and 1,000,000 shares of Arch Series D convertible preferred
       stock that automatically converts into 6,613,180 shares of common stock
       when the merger closes in exchange for discount notes tendered by Arch
       noteholders in negotiated transactions. If all of the remaining
       outstanding discount notes are exchanged, Arch will have issued a total
       of 29,651,984 shares of its common stock for all of its discount notes
       that were outstanding on November 7, 1999.

     - The Arch board of directors, after the merger, will consist of 12
       directors. Six directors will be designated by the current Arch directors
       and three directors will be designated by the current PageNet directors.
       Each of the three largest holders of PageNet notes being exchanged for
       shares of PageNet common stock may also designate one director. To the
       extent any of these three largest holders do not designate directors, the
       current Arch directors will designate additional directors.

BACKGROUND OF THE MERGER

     At a board of directors meeting on June 10, 1999, the directors of PageNet
discussed the possibility of a combination of PageNet with another major paging
company. The other paging company's chief executive office had indicated an
interest in pursuing a possible combination with PageNet in a conversation
initiated by John P. Frazee, Jr., PageNet's chief executive officer. During the
preceding year, Mr. Frazee had reported to the directors on preliminary
discussions about a possible combination of PageNet with two other major paging
companies and a paging equipment provider. The directors supported such
discussions, but the discussions did not proceed beyond a preliminary stage. Mr.
Frazee advised the directors that he believed such a combination with the
company which had now indicated interest in such a transaction could offer
synergies and cost savings. Mr. Frazee said he had discussed the possible
combination with representatives of Goldman, Sachs & Co. and Morgan Stanley Dean
Witter, which had been acting as PageNet's outside financial advisors with
respect to possible strategic options, and that representatives of both Goldman
Sachs and Morgan Stanley considered such a transaction to be

                                       11
<PAGE>   19

possible. The directors supported continued discussion with the other paging
company about a possible combination.

     On June 10, PageNet entered into a confidentiality agreement with the other
paging company permitting the exchange of confidential information. Management
personnel, lawyers and investment bankers from both companies subsequently met
during June and July to conduct mutual due diligence, to further evaluate and
analyze potential synergies and savings and to discuss various aspects of a
possible combination.

     At a meeting on July 22, the PageNet directors again discussed the
possibility of a combination with the other paging company. Representatives of
Goldman Sachs and Morgan Stanley reviewed with the PageNet directors the overall
industry trends, PageNet's strategic and financial position and the prospective
combination. The directors concluded that a combination with the other paging
company appeared to be desirable if acceptable financial terms, which had not
yet been discussed, could be negotiated. After that meeting, due diligence and
other discussions with the other paging company continued.

     In early August 1999, representatives of Goldman Sachs and Morgan Stanley
met with the financial advisors for the other paging company to discuss possible
financial and other terms of a combination and reported the outcome of such
discussions to Mr. Frazee. Mr. Frazee then reported the outcome of those
discussions to the directors. The directors concluded, based upon that meeting,
that the difference between the two companies' judgment on their relative
valuations was so great that agreement on acceptable terms would not be
possible. Mr. Frazee said that he continued to believe that a combination of
PageNet with another major paging company was highly desirable and he
recommended that PageNet approach Arch about a possible combination with
PageNet. Mr. Frazee said that he believed that Arch was the only other paging
company with operations of sufficient scale and comparability to PageNet to
offer the prospect for comparable synergies and cost savings. The directors
supported such an approach to Arch.

     On August 6, Mr. Frazee met with C. Edward Baker, Jr., chief executive
officer of Arch, to discuss the possibility of a business combination between
Arch and PageNet.

     At a meeting on August 10, the Arch directors discussed the possibility of
further consolidation within the wireless messaging industry and the role that
Arch might play in such consolidation. It was the consensus of the directors
that Mr. Baker should continue discussions with PageNet concerning a possible
business combination.

     On August 17, Mr. Frazee, Edward W. Mullinix, Jr., chief operating officer
of PageNet, and Julian B. Castelli, senior vice president and chief financial
officer of PageNet, met with Mr. Baker and J. Roy Pottle, executive vice
president and chief financial officer of Arch. Mr. Baker and Mr. Frazee agreed
that the two companies should explore the possibility of a combination.

     On August 26, Arch and PageNet entered into a confidentiality agreement
permitting the mutual exchange of confidential information. On that date
management of Arch and PageNet, together with representatives of Goldman Sachs
and Morgan Stanley and Arch's financial advisor, Bear Stearns & Co., as well as
outside counsel for both companies, met to review potential cost savings and
synergies and to discuss structural and legal aspects of a possible combination.
In early September, Mr. Frazee and Mr. Baker had further conversations about a
possible combination.

     During the week of September 6, the chief executive officer of the other
paging company contacted Mr. Frazee and indicated a strong desire to resume
discussions of a possible combination. Mr. Frazee reported that contact to the
PageNet directors at a board meeting on September 13. Mr. Frazee said that
representatives of Goldman Sachs and Morgan Stanley had talked with the other
paging company's financial advisors and believed there was now serious interest
in a possible combination. The directors discussed the possible combination with
the other paging company and also reviewed the discussions which had occurred
with Arch.

     At the meeting on September 13, PageNet's directors also discussed
PageNet's financial condition and concluded that PageNet needed additional
outside financial advice because the failure to reverse

                                       12
<PAGE>   20

continued declining revenues or sufficiently reduce operating costs, based upon
preliminary third quarter results of operations, potentially threatened
PageNet's liquidity and compliance with bank credit agreements and bond
indentures. After that meeting, PageNet engaged Houlihan Lokey Howard & Zukin
Capital as an additional financial advisor to advise PageNet with respect to the
possible need for a recapitalization or other form of debt restructuring on a
standalone basis or on the possibility that PageNet might seek to combine such a
recapitalization with a merger with the other paging company or with Arch.
Goldman Sachs, Morgan Stanley and Houlihan Lokey then resumed discussion with
the other paging company's financial advisors about the possible terms of a
combination.

     At a meeting of the Arch directors on September 28, Mr. Baker reported on
the status of discussions with PageNet concerning a possible business
combination, noting that such discussions remained very general. It was the
consensus of the directors that Mr. Baker should continue such discussions.

     At a meeting of the PageNet board on October 1, representatives of Goldman
Sachs, Morgan Stanley and Houlihan Lokey reviewed with the PageNet directors
various possible alternatives, including PageNet's going forward without
significant change in capital structure, the possibility of a stand-alone
recapitalization, a potential merger without a recapitalization and a potential
merger coupled with a recapitalization. The directors discussed the various
options and concluded that a merger coupled with a recapitalization appeared to
be the best alternative for all of PageNet's stakeholders, including its
noteholders and stockholders. The directors discussed with the financial
advisors the possible structure of such a transaction and the risks and other
difficulties associated with its consummation. The advisors indicated that they
had discussed the possibility of such a combined merger and recapitalization
with the other paging company, which was interested in pursuing such a
transaction. The directors authorized management and the advisors to seek to
negotiate such a transaction with the other paging company, recognizing that,
depending on the course of those negotiations, PageNet might also want to
discuss such a transaction with Arch.

     Following that board meeting on October 1, PageNet's management, financial
advisors and lawyers met with management, financial advisors and lawyers for the
other paging company. Negotiations toward possible agreement on the terms of a
transaction that would combine a merger with a recapitalization through exchange
offers by both companies continued actively until the week of October 11, 1999.
During that week, the other paging company communicated to PageNet, through its
financial advisors, revised proposed financial terms of the transaction which
were different and less favorable to PageNet than the terms previously
discussed. In light of that change, and because of continuing uncertainty about
whether agreement on financial and other aspects of the transaction could be
reached and whether the transaction could be consummated, the directors decided
that PageNet should contact Arch to determine if a transaction with Arch might
be possible that would be more favorable to PageNet's stakeholders.

     On October 15, Mr. Frazee, Mr. Castelli and representatives of Houlihan
Lokey met with Mr. Baker and representatives of Bear Stearns. Mr. Baker
indicated a strong desire to try to negotiate a combination between Arch and
PageNet. Following that meeting, the financial advisors for Arch and PageNet
continued to discuss proposed financial terms of such a combination transaction.

     On an October 17 conference call, Mr. Baker provided an update to certain
Arch directors on discussions with PageNet and its financial advisors. Mr. Baker
noted that the financial advisors had discussed a business combination involving
a simultaneous merger and recapitalization of both companies to be accomplished
through exchange offers with certain existing noteholders. Mr. Baker reported
that no consensus as to the allocation of the equity of a combined entity
between the Arch and PageNet stockholders had emerged. Thereafter, Mr. Baker
contacted other Arch directors and provided similar updates.

     At a board meeting on October 24, Goldman Sachs, Morgan Stanley and
Houlihan Lokey reviewed with the PageNet directors the proposed terms of a
possible merger with Arch and discussed various factors relating to the
likelihood of successfully consummating such a transaction. The directors
determined that the proposed merger with Arch appeared to be more favorable for
PageNet and all of its stakeholders than the proposed transaction with the other
paging company and also appeared to be more

                                       13
<PAGE>   21

likely to be consummated successfully. The directors directed management and
PageNet's legal and financial advisors to proceed as rapidly as possible to seek
to negotiate an agreement for such a merger with Arch.

     At a meeting of the Arch directors on October 25, Mr. Baker reported on the
status of the continuing discussions with PageNet, including proposed terms of a
possible merger and recapitalization and the allocation of equity between the
Arch and PageNet stakeholders. The directors determined that management and
Arch's advisors should proceed with due diligence investigations and negotiation
of a merger agreement.

     During the following week, management teams from Arch and PageNet met to
review potential cost savings and synergies. In addition, financial advisors,
legal counsel and management personnel from both companies carried out mutual
due diligence investigations. Negotiations by the respective managements,
financial advisors and counsel over the terms of a merger agreement between Arch
and PageNet then proceeded intensively until a proposed definitive agreement was
reached.

     At meetings held on November 1 and 2, Arch's management, Bear Stearns and
Arch's counsel reviewed with the Arch directors the proposed terms of a business
combination with PageNet, including a draft of a proposed merger agreement. The
directors received a presentation from Bear Stearns concerning the potential
benefits and risks of a merger, a financial profile of PageNet, a pro forma
analysis of a combined entity, the relative contributions of Arch and PageNet in
relation to the proposed enterprise value allocation in the combined entity and
pro forma discounted cash flow equity values that might be realized by existing
Arch stockholders under the merger in comparison with the pro forma discounted
cash flow equity value to existing Arch stockholders on a standalone basis.
Management and the financial and legal advisors to Arch were directed to seek to
finalize the terms of a definitive agreement relating to the proposed merger.

     The directors of PageNet met on November 7 to consider the proposed merger
agreement. At that meeting the directors reviewed:

     - the potential benefits and risks associated with the merger;

     - the estimated values to be realized by PageNet's stockholders and
       bondholders under the merger in comparison to the possible transaction
       with the other messaging company and standalone alternatives;

     - the relative contributions of Arch and PageNet in relation to the shares
       in the combined enterprise to be received by their respective
       stakeholders;

     - the likelihood of consummation of the merger;

     - the future prospects of the combined company; and

     - various other matters.

At the meeting, representatives of each of Goldman Sachs, Morgan Stanley and
Houlihan Lokey, provided their formal analysis regarding the proposed
transaction. After discussion, each of Houlihan Lokey and Morgan Stanley gave
its oral opinion that as of November 7, the consideration to be received by the
holders of PageNet common stock on such date pursuant to the merger and the Vast
distribution, taken as a whole, was fair from a financial point of view and
Goldman Sachs gave its oral opinion that as of November 7, 1999, the exchange
ratio pursuant to the merger agreement was fair from a financial point of view
to the holders of PageNet common stock as of such date. Goldman Sachs, Morgan
Stanley and Houlihan Lokey then indicated that they would confirm their opinions
in writing. Representatives of Mayer, Brown & Platt, outside counsel to PageNet,
reviewed with the PageNet directors the terms of the proposed merger agreement.
After receiving advice from their financial and legal advisors and further
deliberations, and taking into account the various factors described below under
"-- PageNet's Reasons for Merger," the directors unanimously approved the
proposed merger on the evening of November 7.

                                       14
<PAGE>   22

     The directors of Arch met on November 7 to consider the proposed merger
agreement. At that meeting management and legal counsel reported on changes to
the merger agreement from the draft previously reviewed and the directors
received an update of the Bear Stearns presentation delivered at the November 2
meeting. After receiving further advice from its legal and financial advisors,
including an oral opinion (subsequently confirmed in writing) from Bear Stearns
that the exchange ratio as described in the merger agreement was fair, from a
financial point of view, to the stockholders of Arch, the Arch directors
unanimously approved the proposed merger in the evening of November 7.

     Later in the evening of November 7, the merger agreement was executed by
Arch and PageNet.

     On January 7, 2000 the parties amended the merger agreement (1) to reduce
the amount of senior secured debt financing that Arch and PageNet must obtain in
order to effect the merger from $1.5 billion to $1.3 billion, and (2) to
increase the percentage of its total common equity that Vast may set aside for
an employee stock option, stock ownership or other similar plan from 15% to 20%.

     On May 10, 2000, Arch and PageNet entered into a further amendment of the
merger agreement which, among other things:

     - extended the date on which either PageNet or Arch may terminate the
       merger agreement if the merger has not been consummated from June 30,
       2000 to September 30, 2000, subject to further extension in certain
       circumstances;

     - eliminated the requirement that a specified percentage of Arch's 10 7/8%
       discount notes due 2008 be exchanged for shares of Arch common stock as a
       condition to the merger;

     - eliminated the requirement that the outstanding shares of Arch's Series C
       convertible preferred stock convert into shares of Arch common stock as a
       condition to the merger;

     - provided for the conversion, in Arch's discretion, of Arch's Class B
       common stock into shares of Arch common stock upon the effectiveness of
       the merger; and

     - provided that holders of PageNet's common stock outstanding at the date
       of the stockholders meeting at which the merger is approved shall have
       appraisal rights as required by applicable law.

     On July 14, 2000 three noteholders of PageNet filed an involuntary chapter
11 petition against PageNet in the United States Bankruptcy Court for the
District of Delaware. The petition related solely to Paging Network, Inc. and
not to any of its subsidiaries. The petitioning creditors had previously
expressed their support for the Arch merger transaction and stated their belief
that an immediate chapter 11 filing would expedite PageNet's ability to
consummate the transaction.

     On July 23, 2000, Arch and PageNet entered into a further amendment of the
merger agreement which:

     - decreased the merger consideration to be paid to PageNet stockholders
       such that PageNet stockholders will receive 0.08365112 of a share of Arch
       common stock for each share of PageNet common stock they own immediately
       prior to the effective time of the merger;

     - changed the term "stockholders" to "stakeholders" in the provision
       regarding consideration of third party acquisition proposals by the
       respective boards of PageNet and Arch so that the boards are expressly
       authorized to consider the interests of creditors;

     - increased the total number of Vast shares to be distributed to PageNet
       stockholders in connection with the merger from 11.6% of the total equity
       ownership of Vast to 20.0% of the total equity ownership of Vast and
       decreased the total number of Vast shares to be distributed to PageNet
       noteholders by an identical amount; and

     - eliminated as a condition to Arch's obligation to effect the merger the
       requirement that Arch receive a favorable tax opinion of Hale and Dorr
       LLP regarding the treatment of the merger for federal income tax
       purposes.

                                       15
<PAGE>   23

     On July 24, 2000, Paging Network, Inc. consented to an order for relief
which, in effect, converted the involuntary chapter 11 petition into a voluntary
proceeding. On the same date, Paging Network, Inc.'s domestic operating
subsidiaries, other than Vast, filed voluntary chapter 11 petitions in the
United States Bankruptcy Court for the District of Delaware. On July 25, 2000,
PageNet filed its proposed bankruptcy plan and disclosure statement which
provide for the implementation of the merger between PageNet and Arch. A hearing
with respect to the bankruptcy court's approval of PageNet's disclosure
statement is scheduled for September 7, 2000. On July 25, 2000, PageNet also
filed and obtained approval of motions to approve its proposed
debtor-in-possession financing and to obtain other relief related to the ongoing
operation of its business. PageNet's motion to assume the termination fee and
certain related provisions of the Arch merger agreement was approved by the
bankruptcy court on August 22, 2000.

     On July 24, 2000, PageNet announced that its board of directors had
concluded that a proposal received from Metrocall, Inc. was not a "superior
proposal" to the Arch merger within the meaning of the merger agreement. PageNet
also announced that the board would not discuss the proposal further with
Metrocall. On August 4, 2000, Metrocall filed a motion requesting that the
bankruptcy court terminate PageNet's exclusivity period and permit Metrocall to
submit a competing plan of reorganization in PageNet's chapter 11
reorganization. A continued hearing on that motion is scheduled for September 7,
2000. On August 22, 2000, the bankruptcy court granted Metrocall the right to
conduct a limited due diligence investigation of PageNet through September 1,
2000.

ARCH'S REASONS FOR THE MERGER; RECOMMENDATION OF ARCH'S BOARD OF DIRECTORS

     Arch's board of directors believes that the merger represents a strategic
opportunity to significantly expand the size and scope of Arch's operations,
while substantially decreasing Arch's overall financial leverage. Together,
these two benefits should enable Arch to more quickly and efficiently begin to
offer new wireless communication products and services to its customers. The
board believes that, following the merger, Arch will have greater financial
strength, operational efficiencies and growth potential than either Arch or
PageNet would have on its own. This is because of the complementary nature of
PageNet's systems and software resources and Arch's customer base and marketing
abilities. Arch's board has identified a number of potential benefits of the
proposed merger that it believes will contribute to the success of the combined
entities, including the following:

     - The combination of Arch and PageNet would create a company better able to
       move into the emerging technologies that its competitors are utilizing
       presently. Given high fixed infrastructure costs associated with building
       out narrowband PCS networks, greater scale should permit increased
       efficiencies and improved margins for the combined company allowing more
       rapid and efficient transition into the provision of advanced
       communications services.

     - Arch would have access to PageNet's existing narrowband PCS network
       which, in combination with Arch's customer base and marketing abilities,
       should allow Arch to bring new narrowband PCS services to market and sell
       them more quickly and effectively.

     - Together Arch and PageNet should be better positioned to obtain
       commitments from manufacturers such as Motorola to create devices capable
       of functioning on the new narrowband PCS network.

     - Arch's overall leverage should be reduced as a result of the merger.
       Arch's ratio of consolidated total debt to adjusted earnings before
       interest, income taxes, depreciation and amortization, based on
       annualized adjusted earnings before interest, income taxes, depreciation
       and amortization for the six months ended June 30, 2000, was 4.5:1 as of
       June 30, 2000; on a pro forma basis, taking into account the merger and
       assuming the exchange of all outstanding Arch discount notes for common
       stock, but excluding the impact of expected operational cost synergies,
       the leverage ratio for the combined company as measured by the ratio of
       total debt to adjusted pro forma earnings before interest, income taxes,
       depreciation and amortization for the six months ended June 30, 2000
       would have been 4.3:1.

                                       16
<PAGE>   24

     - Significant operational efficiencies could be realized by integrating and
       combining operations and sharing outlays in future investments in
       infrastructure.

     - Greater scale should yield enhanced purchasing power and improved sales
       distribution.

     - Following the merger, Arch's significantly stronger capital structure and
       financial resources should give Arch greater flexibility to implement
       strategic initiatives in order to compete better in the constantly
       evolving wireless communications industry.

     - Arch's larger market capitalization and size may result in broader
       research coverage and increased interest by institutional investors.

     In reaching its decision to approve the merger agreement, the merger and
the other transactions contemplated by the merger agreement, Arch's board of
directors also considered, in addition to the factors described above:

     - information concerning the financial performance and condition, business
       operations, capital and prospects of each of Arch and PageNet on a
       stand-alone basis as well as a combined basis;

     - current industry, economic and market trends, including the likelihood of
       increasing and broadening competition in the wireless communications
       industry;

     - the structure of the merger and the terms of the merger agreement;

     - the opinion of Bear Stearns that the exchange ratio is fair, from a
       financial point of view, to the stockholders of Arch;

     - the importance of market position, significant scale and scope and
       financial resources to Arch's ability to compete effectively in the
       future;

     - the valuation ascribed Arch's common stock in the merger agreement and
       the valuation implied for the combined entity based on currently
       prevailing market multiples; and

     - the relative contributions of Arch and PageNet to the net revenues and
       earnings before interest, income taxes, depreciation and amortization of
       the combined company.

     Arch's board also considered potential risks relating to the merger,
including:

     - the risk that the benefits and synergies sought from the merger would not
       be fully achieved;

     - the management distraction inherent in integrating two business
       operations;

     - the risk that the merger would not be consummated and the possibility of
       incurring a $40.0 million termination fee;

     - the requirement that Arch's common stockholders, preferred stockholders
       and discount noteholders and PageNet's stockholders and noteholders all
       approve or elect to participate in one or more aspects of the
       transaction;

     - the possibility that holders of outstanding Arch debt securities might
       object to the merger;

     - the limitations imposed by the merger agreement on the conduct of Arch's
       business prior to the merger, as well as the length of time projected for
       satisfying all closing conditions; and

     - the significant number of shares of Arch's common stock issuable in
       connection with the merger and related transactions and the consequent
       reduction in the voting power of Arch's current stockholders.

The Arch board believes that these risks were outweighed by the potential
benefits to be realized by the merger.

     The foregoing discussion of the information and factors considered by the
Arch board is not intended to be exhaustive but includes all material factors
considered by the Arch board. In view of the wide variety of information and
factors considered, the board did not find it practical to, and did not, assign
any relative or special weights to the foregoing factors, and individual
directors may have given differing weights to different factors.

                                       17
<PAGE>   25

OPINION OF FINANCIAL ADVISOR TO ARCH

  Opinion of Bear, Stearns & Co. Inc.

     Bear Stearns served as financial advisor to Arch in connection with the
merger. It delivered an oral opinion to Arch's board of directors on November 7,
1999, that, as of that date, the exchange ratio is fair, from a financial point
of view, to the stockholders of Arch. Bear Stearns subsequently confirmed its
opinion in writing. The opinion is based on and subject to several assumptions,
limitations and qualifications.

     THE FULL TEXT OF BEAR STEARNS' OPINION IS ATTACHED AS ANNEX B TO THIS PROXY
STATEMENT. ARCH STOCKHOLDERS SHOULD READ THE ENTIRE BEAR STEARNS OPINION.

     Arch imposed no limitations on the scope of Bear Stearns' investigation or
the procedures that Bear Stearns could follow in rendering its opinion. Arch did
not request Bear Stearns to make, and Bear Stearns did not make, any
recommendation to Arch's board as to the form or amount of the consideration
Arch is to pay to PageNet stockholders, in the merger, after giving effect to
the PageNet exchange offer. That decision was determined through arm's-length
negotiations between the principal parties. In arriving at its opinion, Bear
Stearns did not ascribe a specific range of values to Arch or PageNet, but
instead made its determination as to the fairness to the stockholders of Arch,
from a financial point of view, of the exchange ratio, on the basis of the
financial and comparative analyses described below. Bear Stearns' opinion was
rendered to Arch's board for its information in connection with its
consideration of the merger. Bear Stearns' opinion is not intended to be and
does not constitute a recommendation to any holder of Arch common stock, Class B
common stock or Series C preferred stock as to how such stockholder should vote
on matters relating to the merger, or a recommendation as to any related
financing or restructuring transaction. Arch did not request that Bear Stearns
opine as to, and Bear Stearns' opinion does not address, Arch's underlying
business decision to proceed with or effect the merger. All parties should
understand that, although subsequent developments may affect the conclusions
reached in Bear Stearns' opinion, Bear Stearns does not have any obligation to,
and does not intend to, update, revise or reaffirm its opinion.

     In arriving at its opinion, Bear Stearns, among other things:

     - reviewed the merger agreement;

     - reviewed Arch's and PageNet's recent filings with the Securities Exchange
       Commission;

     - reviewed certain operating and financial information, including
       projections and estimates of combination benefits, provided to it by
       Arch's and PageNet's management relating to the business and prospects of
       Arch and PageNet, respectively;

     - met with certain members of Arch's and PageNet's managements to discuss
       the business, operations, historical and projected financial results and
       prospects of Arch and PageNet, respectively, as well as the potential
       combination benefits for the combined company resulting from the merger;

     - reviewed the historical prices, trading multiples and trading volumes of
       the Arch and PageNet common stock;

     - reviewed publicly available financial data, stock market performance data
       and trading multiples of companies which Bear Stearns deemed generally
       comparable to Arch and PageNet, as appropriate;

     - reviewed the terms of recent merger and acquisition transactions
       involving companies which Bear Stearns deemed generally comparable to
       Arch and PageNet;

     - performed discounted cash flow analyses based on the projections for Arch
       and the combined company furnished to it by Arch; and

     - reviewed the pro forma financial results, financial condition and
       capitalization of the combined company.

                                       18
<PAGE>   26

     Arch and PageNet management made financial and other information available
to Bear Stearns, and Arch management made assurances to Bear Stearns that they
were not aware of any facts that would make financial or other information, the
combined company projections or the combination benefits that Bear Stearns used
to conduct its review incomplete or misleading in any material respect. In
arriving at its opinion, Bear Stearns relied without independent verification on
the assurances of management that the financial and other information provided
and the publicly available information were accurate and complete.

     Bear Stearns relied without independent verification that management had
reasonably prepared the projections for the combined company and the combination
benefits on bases reflecting management's best currently available estimates and
judgments of the anticipated future performance of Arch and PageNet and of the
anticipated combination benefits that could be achieved within the time frames
forecast. Bear Stearns did not undertake an independent evaluation or appraisal
of any of the assets or liabilities of Arch or PageNet nor was Bear Stearns
furnished with any such evaluation or appraisal. Bear Stearns did not assume any
obligation to conduct, nor did it conduct, any physical inspection of the
properties or facilities of Arch or PageNet. Bear Stearns assumed that the
transactions will be consummated in accordance with the terms described in the
merger agreement, without any waiver of any material condition and with all
necessary material consents and approvals without any limitations, restrictions,
conditions, amendments or modifications that collectively would have a material
effect on Arch, PageNet or the combination benefits. Bear Stearns based its
opinion upon market, economic and other conditions as they existed on, and could
be evaluated as of, the date of its opinion.

     The following is a summary of certain financial and comparative analyses
that Bear Stearns performed and presented to the Arch Board.

INCREMENTAL DISCOUNTED CASH FLOW EQUITY VALUE ANALYSIS

     Bear Stearns used projections for Arch on a stand-alone basis and for the
combined company provided by Arch management and compared the discounted cash
flow equity value per existing Arch share based on the projected cash flows of
Arch, on a stand-alone basis, and of the combined company. In this analysis,
Bear Stearns compared the discounted cash flow equity value per Arch share after
giving effect to the proposed merger and the consideration with the standalone
discounted cash flow equity value per Arch share to determine whether the
transaction results in an increase or decrease in discounted cash flow equity
value per share to Arch shareholders. The comparative results indicate an
increase in discounted cash flow equity value per share to Arch shareholders
under a variety of assumptions used in the discounted cash flow analysis. A
discounted cash flow analysis is one measure used to determine the estimated
value of a company. Bear Stearns used the projected cash flows for both Arch and
the combined company plus the respective terminal values, values for each of the
companies at the end of the five-year period, calculated as multiples of 2004
projected earnings before interest, income taxes, depreciation and amortization,
and "discounted" these cash flows to the present using a rate that corresponds
to the respective company's expected cost of capital during that period. Cash
flows for the five-year period beginning January 1, 2000 and ending December 31,
2004 were calculated as earnings before interest, depreciation and amortization
less changes in working capital and capital expenditures. The pro forma
comparison took into effect the restructurings including the exchange for equity
of 100% of the Arch 10 7/8% senior discount notes, the Arch Series C preferred
stock and all of the PageNet senior subordinated notes. Bear Stearns calculated
the range of discounted cash flow equity values per existing Arch share for both
Arch on a stand-alone basis and the pro forma combined company using a discount
rate range of 14% to 18% and using multiples of 2004 projected earnings before
interest, taxes, depreciation and amortization ranging between 5.0x and 7.0x to
calculate the terminal value. Bear Stearns presented the analysis to the Arch
board of directors and highlighted the comparative results, assuming 5.5x, 6.0x
and 6.5x terminal multiples of 2004 projected earnings before interest, taxes,
depreciation and amortization and 14% and 16% discount rates, and that Arch
stockholders would own 29.6% of the combined company (as determined by using the
negotiated exchange ratio). The discounted cash flow equity value per share of
Arch on a stand-alone basis resulted in the following range.

                                       19
<PAGE>   27

         ARCH STAND-ALONE PER SHARE DISCOUNTED CASH FLOW EQUITY VALUES

<TABLE>
<CAPTION>
                                    MULTIPLE OF 2004 EARNINGS BEFORE
                                        INTEREST, INCOME TAXES,
                                     DEPRECIATION AND AMORTIZATION
                       DISCOUNT     --------------------------------
                         RATE        5.5X        6.0X         6.5X
                       ---------    -------     -------     --------
<S>                    <C>          <C>         <C>         <C>
                         14%         $6.64       $8.59       $10.16
                         16%         $4.29       $6.07       $ 7.86
</TABLE>

     The pro forma discounted cash flow equity value per existing Arch share of
the combined company resulted in the following range.

         ARCH PER SHARE PRO FORMA DISCOUNTED CASH FLOW EQUITY VALUES(1)

<TABLE>
<CAPTION>
                                       MULTIPLE OF 2004 EARNINGS
                                     BEFORE INTEREST, INCOME TAXES,
                                     DEPRECIATION AND AMORTIZATION
                       DISCOUNT     --------------------------------
                         RATE         5.0X        6.0X        6.5X
                       ---------    --------    --------    --------
<S>                    <C>          <C>         <C>         <C>
                         14%         $11.17      $12.25      $13.32
                         16%         $ 9.87      $10.85      $11.84
</TABLE>

---------------
(1) Assumes Arch shareholders will own 29.6% of combined company.

     Bear Stearns also performed the same analysis assuming that only 66 2/3% of
the Arch 10 7/8% senior discount noteholders and 66 2/3% of the Arch Series C
preferred stockholders exchanged their securities for combined company equity.
Based on this estimated amount of senior discount notes and Series C preferred
stock exchanged and the exchange ratio for PageNet shares, the existing Arch
stockholders would own 31.4% of the combined company. Based on these new
assumptions, the pro forma discounted cash flow equity values per existing Arch
share of the combined company resulted in the following range.

         ARCH PER SHARE PRO FORMA DISCOUNTED CASH FLOW EQUITY VALUES(1)

<TABLE>
<CAPTION>
                                       MULTIPLE OF 2004 EARNINGS
                                     BEFORE INTEREST, INCOME TAXES,
                                     DEPRECIATION AND AMORTIZATION
                       DISCOUNT     --------------------------------
                         RATE         5.0X        6.0X        6.5X
                       ---------    --------    --------    --------
<S>                    <C>          <C>         <C>         <C>
                         14%         $11.06      $12.19      $13.33
                         16%         $ 9.68      $10.72      $11.76
</TABLE>

---------------
(1) Assumes Arch shareholders will own 31.4% of combined company.

CONTRIBUTION ANALYSIS

     Bear Stearns performed a contribution analysis using:

     - projections for Arch on a stand-alone basis provided by Arch management;
       and

     - projections for PageNet on a stand-alone basis provided by PageNet
       management, as further adjusted by Arch management.

     Bear Stearns first analyzed how much of the estimated net revenues and
earnings before interest, income taxes, depreciation and amortization of the
combined company for the years 1999 through 2003 would be contributed by Arch
and how much would be contributed by PageNet. The following table sets forth the
relative contributions to projected revenues and earnings before interest,
income taxes, depreciation and amortization for Arch, PageNet and the
combination benefits.

                                       20
<PAGE>   28

                         RELATIVE CONTRIBUTION ANALYSIS

<TABLE>
<CAPTION>
                                                              NET REVENUE CONTRIBUTION
                                                      -----------------------------------------
                                                      1999E    2000P    2001P    2002P    2003P
                                                      -----    -----    -----    -----    -----
<S>                                                   <C>      <C>      <C>      <C>      <C>
Arch................................................   45%      48%      50%      51%      51%
PageNet.............................................   55%      52%      50%      49%      49%
</TABLE>

<TABLE>
<CAPTION>
                                                         EARNINGS BEFORE INTEREST, INCOME TAXES,
                                                        DEPRECIATION AND AMORTIZATION CONTRIBUTION
                                                      ----------------------------------------------
                                                      1999E     2000P     2001P     2002P     2003P
                                                      ------    ------    ------    ------    ------
<S>                                                   <C>       <C>       <C>       <C>       <C>
Arch................................................    49%       50%       49%       48%       49%
PageNet.............................................    51%       48%       46%       45%       44%
Merger Benefits.....................................     0%        2%        6%        7%        7%
</TABLE>

     Bear Stearns next analyzed how much of the enterprise value for the
combined company would consist of the value of the interests to be held by
Arch's common stockholders, preferred stockholders and debtholders, on the one
hand, and how much would be held by PageNet's common stockholders and
debtholders on the other. Bear Stearns used enterprise value which includes debt
as well as equity in comparison to the relative contribution to revenue and
earnings before interest, income taxes, depreciation and amortization from Arch
and PageNet, because Arch and PageNet have significantly different levels of
leverage. Because the two companies' revenues and earnings before interest,
income taxes, depreciation and amortization reflect investments from both equity
and debt capital providers, Bear Stearns believed that a comparison of only the
equity components of enterprise value, without also considering the debt and
preferred stock components, would be inappropriate. Specifically, enterprise
value attributable to PageNet's stakeholders, in the aggregate, was calculated
based on:

     - the market value of the shares of Arch common stock to be issued to
       PageNet's stockholders and debtholders in the merger, valued at the
       closing price of Arch common stock on October 29, 1999, plus

     - the value of PageNet debt to be assumed by Arch rather than exchanged for
       Arch common stock as part of the proposed restructuring of PageNet.

Enterprise value attributable to Arch's stakeholders, in the aggregate, was
calculated based on:

     - the market value of all outstanding shares of Arch common stock, based on
       the October 29, 1999 closing price, plus

     - the market value of the shares of Arch common stock to be issued in
       exchange for Arch 10 7/8% senior discount notes and Series C preferred
       stock, plus

     - the value of Arch's remaining net debt, calculated in two alternative
       ways:

        -- using its then current market value, and

        -- using its then current book value.

     The interests of Arch stakeholders -- common stockholders, preferred
stockholders and debtholders -- would represent 51% of the enterprise value of
the combined company, using market value of debt, and 54% of the enterprise
value of the combined company, using book value of debt. Bear Stearns noted that
these percentages of the enterprise value of the combined company exceed Arch's
percentage contribution to the combined company's revenues and earnings before
interest, income taxes, depreciation, and amortization during the five-year
projection period ending December 31, 2003.

     You should read the attached opinion in its entirety before deciding how to
vote in connection with this transaction. The preparation of a fairness opinion
involves various determinations as to the most appropriate and relevant methods
of financial and comparative analysis and the application of those methods to
the particular circumstances and, therefore, a fairness opinion cannot easily be
described. Furthermore, in arriving at its opinion, Bear Stearns did not
attribute any particular weight to any analysis

                                       21
<PAGE>   29

or factor considered by it, but instead it made qualitative judgments as to the
significance and relevance of each analysis and factor. Accordingly, Bear
Stearns believes that its analyses must be considered as a whole and that
considering any portion of such analyses and factors, without considering all
analyses and factors, could create a misleading or incomplete view of the
process underlying its opinion. In its analyses, Bear Stearns made numerous
assumptions about industry performance, general business and economic conditions
and other matters, many of which are beyond the control of Arch and PageNet. Any
estimates contained in these analyses do not necessarily indicate actual values
or predict future results or values, which may be significantly more or less
favorable than as described in the opinion. In addition, analyses relating to
the value of businesses are not appraisals and do not reflect the prices at
which businesses actually may be sold.

     Based on and subject to the foregoing, Bear Stearns delivered its opinion
that, as of the date of the opinion, the exchange ratio was fair, from a
financial point of view, to the stockholders of Arch.

     Bear Stearns is an internationally recognized investment banking firm and,
as part of its investment banking activities, is regularly engaged in the
evaluation of businesses and their securities in connection with mergers and
acquisitions, negotiated underwritings, competitive bids, secondary
distributions of listed and unlisted securities, private placements and
valuations for corporate and other purposes. Arch's board selected Bear Stearns
because of its expertise, reputation, and familiarity with Arch in particular,
and the telecommunications industry in general, and because its investment
banking professionals have substantial experience in transactions similar to the
merger.

     As compensation for its services in connection with the merger, Arch has
agreed to pay Bear Stearns fees for acting as financial advisor in connection
with the merger, including rendering its opinion. These fees include:

     - $650,000 in retainer fees, a progress fee payment, and an opinion fee,
       which have been paid to date

     - An additional fee, currently estimated at $9.7 million, based on the
       total transaction value, as defined; this fee is payable upon
       consummation of the merger, and the fees described above will be credited
       against it.

     If the merger is not consummated, but Arch receives a "termination" fee or
other payment as a result of the termination or cancellation of Arch's efforts
to effect the merger, Arch will pay Bear Stearns a cash fee equal to the lesser
of $3.0 million or 20% of such fee or payment. In addition, Arch has agreed to
reimburse Bear Stearns for reasonable out-of-pocket expenses incurred in
connection with the merger and to indemnify Bear Stearns and certain related
persons for liabilities that may arise out of its engagement by Arch and the
rendering of its opinion.

     In the ordinary course of its business, Bear Stearns may actively trade in
Arch and/or PageNet debt and equity securities for its own account and for the
accounts of its customers and, accordingly, may at any time hold a long or short
position in such securities.

INTERESTS OF CERTAIN PERSONS IN THE MERGER

     Some of the members of PageNet's board of directors and some of PageNet's
officers have interests in the merger that are different from the interests of
the stockholders and senior subordinated noteholders of PageNet and that could
potentially represent conflicts of interest.

     - All outstanding options granted to purchase PageNet common stock,
       including those held by officers and directors of PageNet, will fully
       vest at the effective time of the merger and, if not exercised at that
       time, will be converted into fully vested options to purchase shares of
       Arch common stock, subject to adjustment to reflect the exchange ratio.
       All unvested options to purchase PageNet common stock held by PageNet's
       officers and directors immediately prior to the merger will vest at the
       effective time of the merger. However, all of such options currently have
       exercise prices which are higher, and in some cases significantly higher,
       than PageNet's current stock price, and, as a result of the exchange
       ratio and the impact of the merger, PageNet's officers and directors

                                       22
<PAGE>   30

will hold fewer options to purchase shares at even higher exercise prices. As a
result of these circumstances, the options which will vest are likely to have
little or no value at the time of the merger.

     - At the effective time of the merger, John P. Frazee, Jr. will, and other
       current PageNet directors may, be appointed as additional members of
       Arch's board of directors. Mr. Frazee will also be appointed Chairman of
       the board of directors of the combined company. Additional information
       about Mr. Frazee and the other current PageNet directors is contained in
       "PageNet's Management."

     - Some current officers of PageNet will be entitled to severance payments
       if their employment ceases following the merger as part of a severance
       plan established on January 20, 1999 to provide benefits to substantially
       all of PageNet's employees upon a "change in control" of PageNet. The
       severance plan provides for a severance payment ranging from 50% to 300%
       of the employee's annual salary and annual target bonus compensation and
       payment of a pro-rated portion of the employee's annual target bonus
       compensation. In addition, the severance plan provides that the employee
       will continue to receive substantially similar medical insurance,
       disability income protection, life insurance protection and death
       benefits, and perquisites for at least one year following the date of the
       employee's termination of employment at no additional cost to the
       employee above the cost paid by the employee for such benefits
       immediately prior to the change of control. The severance plan provides
       no special pension benefits. An employee is entitled to receive benefits
       under the severance plan if PageNet or its successor in interest
       terminates the employee without cause or the employee resigns for good
       reason during the 12-month period immediately following a change in
       control. Good reasons for an employee's resignation under the severance
       plan include a reduction in the employee's compensation, a significant
       change in the employee's duties, responsibilities, title or authorities,
       relocation of the employee's office to a location more than 50 miles from
       the location of the employee's office prior to the change in control, and
       PageNet's failure to obtain the agreement from any successor to assume
       and agree to perform the severance plan. The amount an employee will
       receive depends upon the employee's position at PageNet. Payments under
       the plan are made in one lump sum. At the time of its consideration of
       the Arch merger, PageNet's board of directors made changes in the
       severance plan to increase the number of employees entitled to severance
       payments at the 200% level and to increase the severance percentages
       applicable to John P. Frazee, Jr., Mark A. Knickrehm, Edward W. Mullinix,
       Jr., Lynn A. Bace and Julian B. Castelli from 200% to 300% of their
       annual salary and annual target bonus compensation. On May 26, Mark A.
       Knickrehm resigned as President and Chief Operating Officer of Vast. Mr.
       Knickrehm therefore has no right to receive any payments under PageNet's
       severance plan. Subsequently, the board of directors approved a further
       amendment to the severance plan to provide a gross-up of the amount
       payable to Messrs. Frazee, Mullinix, Bace and Castelli under the plan on
       account of excise taxes anticipated to be payable by such individuals
       upon a distribution pursuant to the plan.

                                       23
<PAGE>   31

      The following table sets forth the estimated value of payments and
      benefits that would be paid to each current executive officer of PageNet
      under PageNet's severance plan if the executive officer's employment is
      terminated within 12 months following the merger in accordance with the
      severance plan:

<TABLE>
<CAPTION>
                                        ESTIMATED VALUE OF PAYMENTS AND BENEFITS TO WHICH
                                          PAGENET'S CURRENT EXECUTIVE OFFICERS WOULD BE
                                             ENTITLED UPON TERMINATION OF EMPLOYMENT
      NAME OF EXECUTIVE OFFICER             IN ACCORDANCE WITH THE SEVERANCE PLAN(1)
      -------------------------         -------------------------------------------------
<S>                                     <C>
Lynn A. Bace..........................                     $2,608,545
Andreas Bremer........................                        261,774
Julian B. Castelli....................                      1,986,376
John P. Frazee, Jr. ..................                      6,512,506
Jason G. Gillespie....................                        795,081
Edward W. Mullinix, Jr. ..............                      3,050,829
Timothy J. Paine......................                        705,289
Douglas R. Ritter.....................                      1,075,773
G. Robert Thompson....................                        744,385
Ruth Williams.........................                        796,075
</TABLE>

-------------------------

          (1) The portion of the severance plan payment that is attributable to
              the pro-rated amount of the executive officer's target bonus
              compensation is estimated based on the assumption that the
              executive officer's employment is terminated on September 30,
              2000, and would be greater if the executive officer's employment
              terminates later in 2000. The portion of the severance plan
              payment that is attributable to PageNet's continuation of benefits
              and perquisites assumes that PageNet provides the same level of
              benefits and perquisites to each executive officer for the full 12
              month period following termination and the estimated value
              attributed to such benefits and perquisites is based on the cost
              incurred by PageNet to provide such benefits and perquisites in
              1999.

      On May 15, 2000, Arch announced the senior management team for the
      combined company, which did not include any PageNet officers.

     PageNet's and Arch's boards of directors were aware of these interests and
considered them, among other matters, when adopting the merger.

TREATMENT OF PAGENET'S COMMON STOCK

     In the merger, each issued and outstanding share of PageNet common stock
will be converted into 0.08365112 shares of Arch common stock. However, shares
held by Arch or any wholly owned subsidiary of Arch will be canceled without
conversion. The exchange ratio will be adjusted to eliminate the effect of any
stock split, stock dividend, stock distribution or other similar transaction by
either Arch or PageNet that occurs before the merger, except for the
distribution of stock of Vast to holders of PageNet common stock and senior
subordinated notes.

                                       24
<PAGE>   32

STOCK OWNERSHIP IN THE COMBINED COMPANY

     The following table sets forth the expected beneficial ownership of Arch
common stock following the merger and the Arch exchange offer, assuming the
conversion of all convertible preferred stock of Arch into common stock:

<TABLE>
<CAPTION>
                                                                PERCENTAGE OWNERSHIP OF
                                                                   ARCH COMMON STOCK
                                                                      OUTSTANDING
                                                              ---------------------------
                                                              JUNE 30, 2000   AS ADJUSTED
                                                              -------------   -----------
<S>                                                           <C>             <C>
Arch stockholders...........................................      100.0%          42.4%
Arch discount noteholders...................................         --            6.5%
PageNet stockholders........................................         --            5.0%
PageNet senior subordinated noteholders.....................         --           46.1%
                                                                  -----          -----
                                                                  100.0%         100.0%
                                                                  =====          =====
</TABLE>

Arch stockholders include former noteholders who have exchanged their notes for
common or preferred stock since the announcement of the merger. This table
assumes that all of Arch's discount notes are exchanged for common stock prior
to the merger. The actual capitalization of Arch upon closing of the merger may
vary from the foregoing table. For example, if 1% of Arch's outstanding discount
notes were tendered and accepted, holders of Arch discount notes would own 0.1%
and the percentage ownership of the Arch stockholders and the PageNet
stockholders and noteholders would increase proportionately. See "The Merger."

ARCH'S EXCHANGE OFFER

     Concurrently with the solicitation of proxies for approval of the merger,
Arch will conduct at least one exchange offer for all of its outstanding 10 7/8%
senior discount notes. In the exchange offer, Arch will issue 66.1318 shares of
common stock in exchange for each $1,000 principal amount at maturity of 10 7/8%
discount notes tendered pursuant to its exchange offer, together with all
accreted interest on such notes. As of the date of this proxy statement, $172.4
million in aggregate principal amount at maturity of discount notes remain
outstanding.

     Holders of the discount notes who tender in connection with the exchange
offer will be required to give their consent to:

     - amend the indenture for the notes, if necessary, to permit completion of
       the merger;

     - amend the indenture to eliminate:

        - any covenants which may be modified or eliminated by a majority vote
          of the discount notes;

        - any events of default which relate to:

         -- the non-payment or acceleration of other indebtedness,

         -- the failure to discharge judgments for the payment of money, or

         -- the bankruptcy or insolvency of any subsidiaries; and

        - any provisions which condition mergers or consolidations on compliance
          with any financial criteria.

In addition, each holder of discount notes will be required to waive any and all
existing defaults with respect to the discount notes.

     The expiration date will be 12:00 midnight, New York City time, on the 35th
day after the commencement of the exchange offer, or at a later date which is
mutually agreed upon by Arch and PageNet.

                                       25
<PAGE>   33

REGULATORY APPROVALS

     Under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, PageNet and
Arch could not merge until notifications were furnished to the Federal Trade
Commission and the Antitrust Division of the Department of Justice and the
waiting period requirements were satisfied. On April 7, 2000, the Antitrust
Division informed Arch and PageNet that it had closed its review of the merger
and all waiting periods under the Hart-Scott-Rodino Antitrust Improvements Act
of 1976 have expired.

     On December 31, 1999, Arch and PageNet filed a Request for Approval of a
Transfer of Control of the Federal Communications Commission licenses held by
each of Arch's and PageNet's subsidiaries. By order dated April 25, 2000, the
Federal Communications Commission approved the merger of Arch and PageNet. The
Commission also required the combined company to divest two of its five
narrowband PCS licenses within 90 days of the merger occurring because it
appeared the combined company would hold five narrowband PCS licenses, in
violation of a Commission three-channel narrowband PCS limit; however, by order
dated May 5, 2000, the Federal Communications Commission eliminated its
three-channel narrowband PCS limit. Thus, the combined company will be able to
retain all five of its narrowband PCS licenses.

     PageNet and Arch filed all necessary information concerning the merger, as
required by several state public utility commissions.

     At any time before the effective time of the merger, the Antitrust
Division, the Federal Trade Commission, state attorneys general or a private
person or entity could seek under antitrust laws, among other things, to enjoin
the merger and, any time after the effective time of the merger, to cause Arch
to divest itself, in whole or in part, of the stock of PageNet or of businesses
conducted by PageNet in the merger. There can be no assurance that a challenge
to the merger will not be made or that, if such a challenge is made, Arch will
prevail.

MATERIAL FEDERAL INCOME TAX CONSIDERATIONS

     Arch's tax counsel, Hale and Dorr LLP, is of the opinion that, for federal
income tax purposes, neither Arch nor its stockholders will recognize gain or
loss as a result of the merger. See "Material Federal Income Tax
Considerations."

ACCOUNTING TREATMENT OF THE MERGER

     Arch will account for the merger using the purchase method of accounting
for a business combination, in accordance with Accounting Principles Board
Opinion No. 16. The assets and liabilities of PageNet, including intangible
assets, will be recorded at their fair market values and included in the
financial statements of Arch. The results of operations and cash flows of
PageNet will be included in Arch's financial statements from the date of the
merger.

QUOTATION ON NASDAQ NATIONAL MARKET SYSTEM

     It is a condition to the closing of the merger that Arch shall have filed a
notification for the shares of Arch common stock to be issued in the merger to
be listed on the Nasdaq National Market System.

NO APPRAISAL RIGHTS

     Arch stockholders do not have appraisal rights in connection with the
merger.

                                       26
<PAGE>   34

                              THE MERGER AGREEMENT

     The following is a summary of the material provisions of the merger
agreement, a copy of which is attached as Annex A to this proxy statement and is
incorporated by reference into this summary. We urge you to read the merger
agreement in its entirety for a more complete description of the terms and
conditions of the merger and related matters.

STRUCTURE OF THE MERGER

     Following the confirmation of PageNet's bankruptcy plan and the
satisfaction or waiver of all other conditions to the merger, a wholly owned
subsidiary of Arch will merge into PageNet, and PageNet will become a wholly
owned subsidiary of Arch. Two business days after all conditions to the merger
are fulfilled or waived, or at such other time and date as Arch and PageNet
agree, we will file a certificate of merger with the Delaware Secretary of
State. The phrase "effective time of the merger" refers to the time of that
filing, or any other time that we agree upon and specify in the certificate of
merger.

     Immediately prior to the effective time of the merger, PageNet will
distribute 60.5% of the equity of Vast to its noteholders. PageNet will also
distribute 20.0% of the equity of Vast to persons who are PageNet stockholders
prior to the transaction. After the merger, the combined company will retain
19.5% of the equity of Vast. These percentages will be diluted proportionately
if Vast issues additional equity before or after the merger.

THE EXCHANGE RATIO AND TREATMENT OF PAGENET COMMON STOCK

     At the effective time of the merger each outstanding share of PageNet
common stock will be converted into 0.08365112 shares of Arch common stock.
Shares of PageNet common stock owned by Arch or any direct or indirect wholly
owned subsidiary of Arch will be canceled and holders of shares exercising
appraisal rights will have the rights granted under Delaware law. If, before the
effective time of the merger, the issued and outstanding shares of Arch common
stock are changed into a different number of shares as a result of a
reclassification, stock split, reverse stock split, stock dividend or stock
distribution, an appropriate adjustment will be made to the number and kind of
shares of Arch common stock that PageNet stockholders are to receive in the
merger.

     No fractional shares of Arch common stock will be issued in the merger.
Instead, Arch will pay cash to each holder of PageNet common stock who would
otherwise be entitled to receive a fraction of a share of Arch common stock, in
an amount equal to the fraction, rounded to the nearest one-hundredth of a
share, multiplied by the average closing price per share of Arch common stock as
reported in The Wall Street Journal, New York City edition, during the ten
trading days immediately prior to the effective time of the merger. No interest
will be paid or accrued on cash to be paid instead of fractional shares.

EXCHANGE PROCEDURES

     At the effective time of the merger, Arch will deposit with Harris Trust
Company of New York for distribution to the holders of PageNet common stock,
certificates representing shares of Arch common stock issuable under the merger
agreement and an amount of cash sufficient to pay cash instead of fractional
shares. Arch will make sufficient funds available to the exchange agent from
time to time as needed to pay cash in respect of dividends or other
distributions on unexchanged shares.

TREATMENT OF PAGENET STOCK OPTIONS

     At the effective time of the merger, each unvested option to purchase
PageNet common stock previously granted under PageNet's stock plans will
automatically vest. We will then convert each outstanding PageNet option into an
option to purchase the same number of shares of Arch common stock that the
holder of the option would have received in the merger if the holder had
exercised the option immediately prior to the merger. The number of shares of
Arch common stock calculated in the conversion will be rounded down to the
nearest whole number. The exercise price per share of Arch

                                       27
<PAGE>   35

common stock subject to each option will equal the aggregate exercise price of
the PageNet common stock which would have been purchasable under the PageNet
option, divided by the number of shares of Arch common stock the holder of the
option would have received in the merger if the holder had exercised the option
immediately prior to the merger, rounded down to the nearest whole number.

REPRESENTATIONS AND WARRANTIES

     The merger agreement contains representations and warranties of PageNet and
Arch relating to:

     - their organization, existence, good standing, corporate power,
       qualification to do business and similar corporate matters;

     - their capital structure;

     - the authorization, execution, delivery and performance of the merger
       agreement;

     - the absence of any required governmental and third-party approvals other
       than those specified in the merger agreement;

     - the absence of breaches, violations or defaults under their corporate
       charters and bylaws and other agreements and documents;

     - the accuracy of their financial statements and any filings with the
       Securities and Exchange Commission;

     - the absence of certain changes in their businesses since the end of the
       prior fiscal year;

     - the absence of litigation and liabilities, including liabilities
       associated with employee benefit plans;

     - their compliance with applicable laws, including environmental and
       regulatory laws;

     - the absence of actions that would prevent the merger from being treated
       as a tax-free reorganization under the Internal Revenue Code;

     - the timely filing of all tax returns and payment of all taxes;

     - the absence of undisclosed brokers and finders;

     - the status of their preparedness with respect to Year 2000 compliance;

     - the approval by each board of directors of the merger agreement and the
       merger;

     - the receipt by each board of directors of the opinions of their
       respective financial advisors that the consideration for the merger is
       fair to holders of PageNet common stock and Arch common stock from a
       financial point of view;

     - their employee benefits plans;

     - the actions taken by each board of directors to make Delaware's
       interested stockholder business combination law, other state takeover
       statutes, each of their rights agreements and any other anti-takeover
       provision in their certificates of incorporation or bylaws inapplicable
       to the merger;

     - their relationships with employees;

     - environmental matters and compliance with environmental laws;

     - their significant agreements; and

     - their intellectual property.

                                       28
<PAGE>   36

COVENANTS

  Conduct of Businesses Prior to the Merger

     Except as contemplated by the merger agreement, PageNet and Arch have
agreed that they and their subsidiaries will conduct their businesses only in
the ordinary and usual course until the effective time of the merger. The merger
agreement includes other limitations, prohibitions and provisions relating to
the conduct of their businesses before the effective time of the merger
concerning:

     - charter and bylaw amendments;

     - changes in capital stock and payment of dividends;

     - actions that would prevent the merger from qualifying as a tax-free
       reorganization under the Internal Revenue Code;

     - increases in compensation, and amendments to employee benefit or
       retirement plans;

     - incurrence or repayment of indebtedness;

     - capital expenditure levels;

     - issuance of capital stock and convertible securities;

     - acquisitions and dispositions;

     - changes in accounting policies or procedures;

     - settlement or release of claims in litigation; and

     - tax elections.

     Some of these limitations do not apply, however, with respect to Vast.
PageNet may, among other things:

     - transfer or encumber shares of capital stock or securities convertible
       into shares of capital stock of Vast;

     - cause Vast to incur debt, so long as the borrowed funds are used solely
       by Vast;

     - transfer specified assets to Vast;

     - establish the terms of the equity interest in Vast to be transferred to
       the holders of PageNet common stock and PageNet notes; and

     - establish an employee equity incentive plan for Vast.

  Non-Solicitation of Competing Proposals

     PageNet and Arch have agreed to restrictions concerning an "acquisition
proposal," which the merger agreement defines generally as a proposal of merger,
business combination or acquisition of more than 10% of their assets or 15% of
their stock. Specifically, each company has agreed that neither it nor its
agents will, directly or indirectly:

     - initiate, solicit, encourage or otherwise facilitate any inquiries or the
       making of any acquisition proposal with a third party;

     - have any discussions with or provide any confidential information or data
       to a third party in connection with an acquisition proposal; or

     - engage in any negotiations concerning an acquisition proposal or
       otherwise facilitate any acquisition proposal.

     The merger agreement expressly allows PageNet and Arch to comply with
Securities and Exchange Commission rules regarding the publication of a board of
directors' recommendations with respect to

                                       29
<PAGE>   37

tender offers, and, subject to some limitations, expressly allows the board of
directors of PageNet or Arch to:

     - negotiate with, and provide information to, a third party in response to
       an unsolicited bona fide written acquisition proposal, if the board of
       directors concludes in good faith, after consulting outside counsel, that
       doing so is necessary to comply with the board's fiduciary duty to its
       stockholders; and

     - recommend an unsolicited proposal to its stockholders, if the board of
       directors concludes in good faith, after consulting its legal and
       financial advisors, that such transaction is reasonably capable of being
       completed, and, if completed, would be more favorable to its stockholders
       than the proposed transaction between Arch and PageNet.

     PageNet and Arch have agreed to terminate all existing discussions and
negotiations with third parties concerning acquisition proposals. Each company
has agreed to notify the other as soon as reasonably practicable if it receives
any acquisition proposal, or if a third party seeks information from it or seeks
to engage it in discussions concerning an acquisition proposal. Each company has
also agreed to keep the other company informed of any such proposals or
inquiries on an ongoing basis.

     The bankruptcy court approved the non-solicitation provision of the merger
agreement on August 22, 2000.

  Stockholders Meeting

     The merger agreement requires Arch to convene a stockholder meeting as soon
as reasonably practicable after Securities and Exchange Commission review of the
proxy statement is concluded.

     Arch has agreed that its board of directors will recommend that Arch
stockholders vote to increase the authorized number of shares of Arch common
stock to an amount sufficient to complete the merger and the Arch exchange offer
and approve the issuance of such common stock.

     The Arch board of directors may withdraw or modify its recommendation if it
determines in good faith, after consultation with outside legal counsel, that
failing to do so would be reasonably likely to be inconsistent with its
fiduciary duties.

     Even if the Arch board of directors withdraws or modifies its
recommendation, it must convene and complete the stockholder meeting which
considers the transaction. The board of directors is not required to convene the
stockholders meeting, however, if PageNet terminates the merger agreement.

  Filings and Other Actions

     Arch and PageNet have agreed to cooperate with each other, and to use their
reasonable best efforts

     - to deliver comfort letters from their respective independent public
       accountants;

     - to take all necessary, proper and advisable actions to complete the
       merger, including obtaining opinions from their respective attorneys,
       preparing and filing promptly all documentation necessary to complete the
       merger, and instituting any court action necessary to obtain approval of
       the merger and defending any court action instituted to prevent
       completion of the merger;

     - to obtain promptly all approvals necessary or advisable to complete the
       merger; and

     - to share all information reasonably necessary and advisable in connection
       with the merger.

  Indemnification; Director and Officer's Insurance

     The merger agreement provides that, for six years after the merger, Arch
will cause PageNet to indemnify and hold harmless each present and former
PageNet director and officer, when acting in such capacity, against any costs or
expenses, including judgments, fines, reasonable attorney's fees, losses,
claims, damages or liabilities incurred in connection with any claim, suit, or
civil, criminal, administrative or investigative proceeding or investigation
relating to matters existing or occurring at or before the merger,

                                       30
<PAGE>   38

to the fullest extent that PageNet would have been permitted to indemnify those
persons under Delaware corporate law and its certificate of incorporation or
bylaws in effect on November 7, 1999. PageNet will also advance expenses as
incurred to the fullest extent permitted under applicable law, provided the
person to whom expenses are advanced provides an undertaking to repay any
advances if it is ultimately determined that he or she is not entitled to
indemnification.

     The merger agreement also provides that, for a period of six years after
the merger, Arch will maintain a policy of officers' and directors' liability
insurance for acts and omissions occurring before the merger with coverage in
amount and scope at least as favorable as PageNet's directors' and officers'
liability insurance coverage on November 7, 1999. If that coverage expires, is
terminated or is canceled, or if the annual premium is increased to more than
200% of the last annual premium paid before November 7, 1999, Arch will use its
best efforts to obtain insurance in an amount and scope as great as can be
obtained for the remainder of the period for a premium not in excess of 200% of
the current premium on an annualized basis. In the alternative, PageNet can
obtain prepaid policies that provide such directors and officers with coverage
for six years against claims arising from facts or events that occurred at or
before the effective time of the merger, including claims relating to the
transactions contemplated by the merger agreement. If PageNet obtains such
prepaid policies, Arch has agreed to maintain such policies in effect and
continue to honor PageNet's obligation.

     Furthermore, all directors and many officers of PageNet are entitled to
indemnification and insurance under an indemnity agreement with PageNet.

  Bankruptcy Provisions

     Arch has agreed to be bound by all of the terms of the merger agreement
provided that PageNet's bankruptcy plan is confirmed by the bankruptcy court by
December 31, 2000 or such later date as is mutually agreed to in writing by Arch
and PageNet. Arch has agreed to take certain actions to support confirmation of
the bankruptcy plan. The bankruptcy court has approved certain sections of the
merger agreement concerning nonsolicitation of competing proposals and the
payment by Arch and PageNet of their respective termination fees.

     Arch may enter into another merger or acquisition transaction, provided
that such transaction would not prevent, materially impair or materially delay
its ability to consummate the merger. If Arch enters into a merger or
acquisition transaction following the commencement of PageNet's bankruptcy case
and as a result of such event PageNet is required to amend its disclosure
statement and resolicit the votes of its creditors, then the time within which
the order of the bankruptcy court confirming the PageNet bankruptcy plan must be
obtained shall be extended for an additional 90 days.

CONDITIONS TO COMPLETION OF THE MERGER

     We will complete the merger only if the conditions set forth in the merger
agreement are satisfied or waived. The conditions to each of Arch's and
PageNet's obligation to complete the merger include:

     - stockholder approval of the transaction by Arch's stockholders;

     - entry of a confirmation order, not subject to a stay or injunction, by
       the bankruptcy court confirming the PageNet bankruptcy plan;

     - the filing of a notification for the listing on the Nasdaq National
       Market System of the Arch common stock to be issued in connection with
       the merger and other transactions contemplated by the merger agreement;

     - the receipt of specified governmental consents, permits, licenses and
       approvals for the merger and the expiration or termination of all
       applicable waiting periods, and any extensions of these periods, under
       the Hart-Scott-Rodino Act;

     - the availability of senior credit facilities in a minimum amount of $1.3
       billion to Arch and its subsidiaries, including PageNet, after the
       merger;
                                       31
<PAGE>   39

     - Arch's receipt of all required state securities and "blue sky" permits
       and approvals;

     - that neither PageNet, Arch nor any of their subsidiaries incur
       out-of-pocket income tax liability in their respective taxable periods of
       more than $25.0 million in the aggregate as a result of the merger; and

     - all conditions under the PageNet bankruptcy plan have been satisfied.

     The additional conditions to Arch's obligation to complete the merger
include:

     - the accuracy of PageNet's material representations and warranties, apart
       from any representations and warranties which would be breached by
       PageNet filing or conducting a bankruptcy case or the filing of an
       involuntary bankruptcy petition or similar creditors' rights petition
       against PageNet;

     - PageNet's performance in all material respects of all its covenants,
       agreements and obligations under the merger agreement;

     - PageNet's receipt of required material consents or approvals to the
       merger and the other transactions contemplated by the merger agreement;

     - Arch's receipt of required material consents or approvals to the merger
       and the other transactions contemplated by the merger agreement; and

     - Arch's receipt of an unqualified certificate from PageNet that each of
       the conditions described above has been satisfied.

     The additional conditions to PageNet's obligation to complete the merger
include:

     - the accuracy of Arch's material representations and warranties,

     - Arch's performance in all material respects of all its covenants,
       agreements and obligations under the merger agreement;

     - Arch's receipt of required material consents or approvals to the merger
       and the other transactions contemplated by the merger agreement;

     - PageNet's receipt of a favorable tax opinion rendered as of the closing
       of the merger from Mayer, Brown & Platt as to the tax consequences of the
       merger to PageNet's stockholders; and

     - PageNet's receipt of an unqualified certificate from Arch that each of
       the conditions described above has been satisfied, that the Arch
       stockholders meeting has been convened and Arch stockholders have:

        - increased the authorized number of shares of Arch common stock to an
          amount sufficient to complete the merger; and

        - approved the issuance of such common stock.

     At any time before the effective time of the merger, to the extent allowed
by law and except for the condition relating to receipt of a favorable tax
opinion, Arch or PageNet may waive any of these conditions without the approval
of their respective stockholders except to the extent they believe that, in the
particular circumstances presented, applicable law requires stockholder
approval. As of the date of this proxy statement, neither company expects to
waive any of these conditions.

TERMINATION OF THE MERGER AGREEMENT

     Arch and PageNet can mutually agree to terminate the merger agreement at
any time without completing the merger.

                                       32
<PAGE>   40

     Also, either Arch or PageNet can, without the consent of the other,
terminate the merger agreement:

     - if the merger is not completed by January 30, 2001;

     - if the Arch stockholder meeting is held and Arch's stockholders do not
       adopt the transaction; or

     - if any order permanently restraining, enjoining or otherwise prohibiting
       completion of the merger has become final and non-appealable.

     Either party can extend the termination date for up to an additional 90
days if such extension is necessary in order to obtain governmental approvals of
the merger under applicable antitrust laws and if all other conditions to
completion of the merger are satisfied or are capable of being satisfied.
Neither party may terminate the merger agreement if such party has materially
breached the terms of the merger agreement and such breach contributed to the
failure of the merger to be completed.

     In addition, PageNet can terminate the merger agreement before the
effective time of the merger if:

     - the board of directors of Arch has withdrawn or adversely modified its
       approval or recommendation of the merger;

     - Arch has breached any representation, warranty, covenant or agreement in
       the merger agreement, and the breach is both material and incurable prior
       to the date at which either Arch or PageNet can, without the consent of
       the other, terminate the merger agreement; or

     - PageNet receives an unsolicited proposal for a business combination
       transaction with a third party that PageNet's board of directors
       concludes is a superior proposal and PageNet provides Arch with all the
       material terms of the proposal at least two business days prior to
       termination and simultaneously with the termination pays the termination
       fee to Arch.

     Finally, Arch can terminate the merger agreement if:

     - the board of directors of PageNet has withdrawn or adversely modified its
       approval or recommendation of the merger;

     - PageNet has breached any representation, warranty, covenant or agreement
       in the merger agreement, and the breach is both material and incurable
       prior to the date at which either Arch or PageNet can, without the
       consent of the other, terminate the merger agreement, but only if the
       breach does not solely result from the filing or conduct of the
       bankruptcy case or from the filing of an involuntary bankruptcy petition
       against PageNet or any of its subsidiaries;

     - an order of a bankruptcy court approving of the nonsolicitation of
       competing proposals and the payment by PageNet of the termination fee has
       not been entered by August 23, 2000;

     - an order of a bankruptcy court confirming the PageNet bankruptcy plan is
       not entered by December 31, 2000 or a later date mutually agreeable to
       Arch and PageNet;

     - the PageNet bankruptcy plan is amended, modified or added to in any
       material respect without the written consent of Arch; or

     - Arch receives an unsolicited proposal for a business combination
       transaction with a third party that Arch's board of directors concludes
       is a superior proposal and Arch provides PageNet with all the material
       terms of the proposal at least two business days prior to termination and
       simultaneously with the termination pays the termination fee to PageNet.

                                       33
<PAGE>   41

TERMINATION FEE

     Arch must pay PageNet a termination fee of $40.0 million by wire transfer
of same day funds if:

     - Arch, its stockholders or its noteholders receives an acquisition
       proposal from a third party or a third party publicly announces an
       intention to make an acquisition proposal and:

          - Arch's stockholders subsequently do not approve the merger;

          - the merger agreement with PageNet is terminated; and

          - Arch either executes and delivers an agreement with a third party
            relating to an acquisition proposal or an acquisition with respect
            to Arch is completed, in either case, within 12 months of the
            termination of the merger agreement with PageNet;

     - PageNet terminates the merger agreement with Arch because:

          - the Arch board of directors has withdrawn or adversely modified its
            approval or recommendation of the merger agreement;

          - Arch has breached any representation, warranty, covenant or
            agreement concerning:

             - the restrictions on acquisition proposals; or

             - Arch's board of directors taking all actions necessary to convene
               a stockholders meeting to consider and vote upon and recommend
               that the stockholders approve an increase in the authorized
               number of shares of Arch common stock to an amount sufficient to
               complete the merger and the issuance of such common stock; or

     - Arch terminates the merger agreement with PageNet in response to a
       superior acquisition proposal by a third party.

     PageNet must pay Arch a termination fee of $40.0 million by wire transfer
of same day funds if:

     - PageNet, its stockholders or its noteholders receives an acquisition
       proposal from a third party or a third party publicly announces an
       intention to make an acquisition proposal and:

          - the bankruptcy court fails to enter the final confirmation order;

          - the merger agreement with Arch is terminated; and

          - PageNet either executes and delivers an agreement with a third party
            relating to an acquisition proposal or an acquisition with respect
            to PageNet is completed, in either case, within 12 months of the
            termination of the merger agreement;

     - Arch terminates the merger agreement with PageNet because the PageNet
       board of directors has withdrawn or adversely modified its approval or
       recommendation of the merger agreement with Arch;

     - the PageNet bankruptcy plan is withdrawn without the prior written
       consent of Arch, or PageNet files any other plan of reorganization or
       amends, modifies or adds to any material provision of the PageNet
       bankruptcy plan in each case without the prior written consent of Arch;

     - any other plan of reorganization filed by a person other than PageNet is
       confirmed by a bankruptcy court;

     - PageNet files a motion to sell or otherwise transfer all or substantially
       all of its assets as part of a sale under the Bankruptcy Code without the
       prior written consent of Arch; or

     - PageNet terminates the merger agreement with Arch in response to a
       superior acquisition proposal by a third party.

     PageNet's obligation to pay a termination fee was approved by the
bankruptcy court on August 22, 2000.

                                       34
<PAGE>   42

     Subject to the possible payment of a termination fee, each of Arch and
PageNet will pay all expenses it incurs in connection with the merger and
related transactions, except that they will share fees paid to the SEC, the
Federal Trade Commission, the Federal Communications Commission and other
federal or state agencies, and all printing and mailing costs incurred in
connection with the merger, equally.

MODIFICATION OR AMENDMENT OF THE MERGER AGREEMENT

     At any time prior to the effective time, Arch and PageNet can modify or
amend the merger agreement if they both agree to do so. Each can waive its right
to require the other to comply with the merger agreement where the law allows.

                                       35
<PAGE>   43

                           PAGENET'S BANKRUPTCY PLAN

     PageNet filed its bankruptcy plan in its chapter 11 case on July 25, 2000.
Through confirmation of its bankruptcy plan, PageNet is seeking to bind its
noteholders and stockholders to the terms of the merger. The following is a
summary of some matters of significance to Arch stockholders that will occur
either pursuant to or in connection with the filing of the chapter 11 case and
confirmation of the PageNet bankruptcy plan.

CLASSIFICATION OF CLAIMS AND EQUITY INTERESTS UNDER THE PAGENET BANKRUPTCY PLAN

     The Bankruptcy Code requires that the PageNet bankruptcy plan classify the
claims against, and equity interests in PageNet. PageNet believes that all
claims and equity interests have been appropriately classified in its bankruptcy
plan. PageNet has separately classified general unsecured claims, mostly claims
of trade creditors, from claims arising under PageNet's senior subordinated
notes. Many of the holders of general unsecured claims are key suppliers of
products and services to PageNet. A failure by PageNet to pay these trade
creditors in accordance with the terms agreed upon could adversely affect
PageNet's ability to obtain essential trade credit and could substantially
impair PageNet's ability to do business with trade creditors whose goods and
services are essential to PageNet.

     The Bankruptcy Code also requires that the PageNet bankruptcy plan provide
the same treatment for each claim or equity interest of a particular class
unless the holder of a particular claim or equity interest agrees to a less
favorable treatment of its claim or equity interest. PageNet believes that its
bankruptcy plan complies with this requirement of equal treatment.

     A class of claims or equity interests that is impaired under the PageNet
bankruptcy plan is entitled to vote to accept or reject the plan, unless the
class will not receive or retain any property under the bankruptcy plan in which
case the class is deemed to have rejected the plan. A class of claims or equity
interests is not impaired if the plan does not alter the legal, equitable or
contractual rights of the holders of such claims or equity interests. Under the
Bankruptcy Code, holders of claims or equity interests which are not impaired
are conclusively presumed to have accepted the bankruptcy plan.

     The PageNet bankruptcy plan classifies creditor claims and stockholder
interests as follows:

<TABLE>
<CAPTION>
CLASS                                                STATUS             VOTING RIGHTS
-----                                              ----------    ---------------------------
<S>                                                <C>           <C>
Class 1 -- Priority Claims                         Unimpaired    -- not entitled to vote
Class 2 -- Bank Secured Claims                     Impaired      -- entitled to vote
Class 3 -- Other Secured Claims                    Unimpaired    -- not entitled to vote
Class 4 -- General Unsecured Claims                Unimpaired    -- not entitled to vote
Class 5 -- Senior Subordinated Note Claims         Impaired      -- entitled to vote
Class 6 -- Old Stock Interests                     Impaired      -- entitled to vote
Class 7 -- Subsidiary Stock Interests and          Impaired      -- entitled to vote
           Subsidiary Claims
</TABLE>

TREATMENT OF PAGENET STOCKHOLDER RIGHTS UNDER THE PAGENET BANKRUPTCY PLAN

     The interests of PageNet stockholders are classified as Class 6 interests
under the PageNet bankruptcy plan.

     Class 6 -- Old Stock Interests

     - Classification:  Old stock interests consist of all equity interests in
PageNet.

     - Treatment:  On the effective date each holder of an allowed old stock
interest (excluding Arch and any of its subsidiaries) will receive, in full
satisfaction of their rights and interests with respect to, on account of or
arising from or in connection with such old stock interests, a pro rata share of
8,720,007 shares of Arch common stock and 4,000,000 shares of Class B common
stock of Vast.

                                       36
<PAGE>   44

     - Voting:  Old stock interests are impaired and the holders of allowed old
stock interests are entitled to vote to accept or reject the PageNet bankruptcy
plan.

     The PageNet bankruptcy plan provides that holders of allowed Class 6
interests will receive a pro rata share of Arch common stock and Vast Class B
common stock. For each 100 shares of PageNet common stock, the PageNet
bankruptcy plan provides for distribution of approximately 8.365 shares of Arch
common stock and approximately 3.837 shares of Vast Class B common stock.

OTHER PROVISIONS OF THE PAGENET BANKRUPTCY PLAN AND INTENDED ACTIONS DURING THE
CHAPTER 11 CASE

  Releases

     With some exceptions PageNet will release pursuant to the PageNet
bankruptcy plan the holders of PageNet secured bank claims, Arch, its
subsidiaries and their officers, directors and agents and PageNet's officers and
directors of all claims which PageNet may have against any of them except for
claims under the merger agreement, other contractual claims and claims for
fraud, gross negligence or willful misconduct.

  Indemnification of Directors, Officers and Employees

     The PageNet bankruptcy plan provides that the obligations of PageNet to
indemnify any person serving at any time on or prior to the effective date as
one of its directors, officers, or employees by reason of such person's service
in such capacity, to the extent provided in PageNet's constituent documents or
by written agreement or Delaware law, shall be deemed and treated as executory
contracts that are assumed by PageNet as of the effective date. Accordingly,
such indemnification obligations shall survive unimpaired and unaffected by
entry of the confirmation order, irrespective of whether such indemnification
becomes owing on account of an act or event occurring before or after the
commencement of the chapter 11 case.

  Provisions Relating to the Merger Agreement

     On August 22, 2000, the bankruptcy court approved the provisions of the
merger agreement that restrict the PageNet's ability to solicit other offers for
PageNet's businesses, and that require PageNet to pay a termination fee to Arch
upon specified termination events and Arch to pay a termination fee to PageNet
upon specified termination events.

     In addition, the PageNet bankruptcy plan provides that on the confirmation
date, PageNet will be deemed to have assumed the merger agreement unless the
merger agreement is assumed by PageNet prior to the confirmation date pursuant
to an order of the bankruptcy court.

  Payment of Prepetition General Unsecured Claims

     During the pendency of the chapter 11 case that may be filed in connection
with the restructuring, PageNet intends to operate its businesses in the
ordinary course and to make payment in full on a timely basis for all goods and
services provided after the commencement of the chapter 11 case. PageNet also
obtained bankruptcy court approval to pay in full in the ordinary course of
business the pre-petition claims owing to general unsecured creditors that were
incurred in the ordinary course of PageNet's business (not including claims
under the senior subordinated notes). PageNet also received a commitment for a
$50 million debtor-in-possession loan facility, and expects that PageNet will
have sufficient funds to pay its prepetition and postpetition general unsecured
creditors in the ordinary course of business through the conclusion of the
chapter 11 case.

  Provisions for Employees; Retention Programs; Employment Contracts

     PageNet also obtained relief from the bankruptcy court so that salaries,
wages accrued and unpaid vacation, health benefits, severance benefits and
similar employee benefits will be unaffected by the filing of the chapter 11
case. PageNet obtained approval of the bankruptcy court, immediately upon
commencement of the chapter 11 case, to honor payroll checks outstanding as of
the date of the

                                       37
<PAGE>   45

commencement of the chapter 11 case, to permit employees to utilize their paid
vacation time which was accrued prior to the filing and to continue paying
medical and other employee benefits under the applicable health plans. PageNet
also obtained the authority to honor certain portions of its employee retention
program. Employee claims and benefits not paid or honored, as the case may be,
prior to the consummation of the bankruptcy plan, will be paid or honored upon
consummation or as soon thereafter as such payment or other obligation becomes
due or payable. Employee benefit claims that accrue prior to the date of the
commencement of the chapter 11 case, will receive unimpaired treatment under the
terms of the PageNet bankruptcy plan.

STANDARDS FOR CONFIRMATION OF THE PAGENET BANKRUPTCY PLAN

     The Bankruptcy Code sets forth the requirements that must be satisfied to
confirm a plan of reorganization. A number of the more significant confirmation
requirements are discussed below. PageNet believes that it has complied or will
comply with each of these requirements.

  Good Faith and Compliance with Law

     The Bankruptcy Code requires that a plan of reorganization be proposed in
good faith and disclose certain relevant information regarding payments due and
the nature of compensation to insiders. PageNet believes it has satisfied these
requirements and will seek a ruling to that effect from the bankruptcy court in
connection with confirmation of the PageNet bankruptcy plan.

  Best Interests

     The Bankruptcy Code requires that, with respect to each impaired class,
each member of such class either:

     - accepts the bankruptcy plan; or

     - will receive or retain under the bankruptcy plan on account of its claim
       or equity interest property of a value, as of the effective date, that is
       at least equal to the value of the property that such member of the class
       would receive or retain if PageNet were liquidated under chapter 7 of the
       Bankruptcy Code.

PageNet's management has prepared a hypothetical Chapter 7 liquidation analysis
to indicate the estimated net present values which would be allocated to
PageNet's creditors and equity holders if PageNet's assets were liquidated.
PageNet believes that its bankruptcy plan will provide members of each impaired
class with at least what they would receive in a chapter 7 liquidation, and
therefore the bankruptcy plan meets this test. For further information on the
liquidation analysis, we refer you to the filings by PageNet with the bankruptcy
court in connection with this matter.

  Feasibility

     The bankruptcy court must also determine that PageNet's bankruptcy plan is
feasible and is not likely to be followed by liquidation or further
reorganization of PageNet. To determine whether the PageNet bankruptcy plan
meets this requirement, PageNet has analyzed its ability, along with Arch, to
meet its obligations under the plan. This analysis includes a forecast of
financial performance of Arch and reorganized PageNet. Based upon such forecast,
PageNet believes that it will have the financial capability to satisfy their
obligations following the effective date of the PageNet bankruptcy plan.
Accordingly, PageNet will seek a ruling to that effect in connection with the
confirmation of the PageNet bankruptcy plan.

  Plan Acceptance

     The Bankruptcy Code requires, subject to certain exceptions, that the
PageNet bankruptcy plan be accepted by all impaired classes of claims and equity
interests. Classes of claims that are not "impaired" under a plan are deemed to
have accepted the plan and are not entitled to vote. A class of claims accepts a
plan if the holders of at least 66 2/3% in dollar amount and more than one-half
in number of the allowed

                                       38
<PAGE>   46

claims in that class that actually vote on the plan, vote to accept the plan. A
class of equity interests accepts a plan if at least 66 2/3% of the allowed
interests in that class that actually vote on the plan vote to accept the plan.
Holders of claims or equity interests who fail to vote or who abstain will not
be counted to determine the acceptance or rejection of the PageNet bankruptcy
plan by any impaired class. PageNet may, however, request confirmation of the
PageNet bankruptcy plan even though some impaired classes have not accepted the
plan.

CONFIRMATION OF THE PAGENET BANKRUPTCY PLAN WITHOUT ACCEPTANCE BY ALL CLASSES OF
IMPAIRED CLAIMS

     In the event that all classes of PageNet's creditors and equity holders do
not accept the PageNet bankruptcy plan, the Bankruptcy Code allows PageNet to
confirm the PageNet bankruptcy plan even if one or more, but not all, of the
impaired classes rejects the plan. If PageNet can demonstrate to the bankruptcy
court that its bankruptcy plan satisfies the requirements of the "cramdown"
provision, each impaired class that voted to reject the PageNet bankruptcy plan
would, nonetheless, be bound to the treatment afforded to that class under the
plan.

     To obtain confirmation of the PageNet bankruptcy plan using the "cramdown"
provision, PageNet must demonstrate to the bankruptcy court that, as to each
class that has rejected the PageNet bankruptcy plan, the treatment afforded to
such class under the plan "does not discriminate unfairly" and is "fair and
equitable."

     In general, a plan does not discriminate unfairly if it provides a
treatment to the class that is substantially equivalent in value to the
treatment that is provided to other classes consisting of claims that have equal
rank. The Bankruptcy Code applies a different test to holders of secured claims,
unsecured claims and equity interests to determine whether the treatment
proposed in a plan of reorganization is "fair and equitable." For secured
claims, the PageNet bankruptcy plan must either provide that the holder will
retain its lien and receive cash payments equal to its claim, or the holder must
receive property that is the indubitable equivalent of the claim. For unsecured
claims, the PageNet bankruptcy plan must provide that the holder will retain
property having a value equal to the amount of its claim, or that no holder of a
claim or interest that is junior to the creditor will receive any value under
the plan. For equity interest holders, the PageNet bankruptcy plan must provide
that no holder of an interest that is junior to the holder will receive any
value under the plan of reorganization.

     In the event that any impaired class fails to accept its bankruptcy plan,
PageNet reserves the right to request that the bankruptcy court confirm the
bankruptcy plan in accordance with the "cramdown" provision under the Bankruptcy
Code. In addition, or as an alternative, PageNet also reserves the right to
modify the plan. Any such confirmation would be subject to judicial approval.

                   MATERIAL FEDERAL INCOME TAX CONSIDERATIONS

SCOPE AND LIMITATION

     This section describes all of the material federal income tax consequences
of the merger applicable to Arch and holders of Arch common stock.

FEDERAL INCOME TAX CONSEQUENCES TO ARCH COMMON STOCKHOLDERS

     In the opinion of Hale and Dorr LLP, counsel to Arch, holders of Arch
common stock will not recognize gain or loss for United States federal income
tax purposes as a result of the merger.

FEDERAL INCOME TAX CONSEQUENCES TO ARCH AND PAGENET

     While it is the opinion of Arch's counsel that Arch will not recognize gain
or loss for federal income tax purposes as a result of the merger, Arch expects
to realize cancellation of indebtedness income resulting from the elimination in
the exchange offer of indebtedness in exchange for consideration having a value
less than the adjusted issue price of the outstanding debt.
                                       39
<PAGE>   47

     The exact amount of the tax liability attributable to such income cannot be
determined precisely, because it depends on the value of the Arch common stock
exchanged for its outstanding 10 7/8% senior discount notes and on certain other
factors. However, under the merger agreement, neither Arch nor PageNet is
obligated to complete the merger if the reasonably expected amount of
"out-of-pocket" tax liability exceeds $25 million in the aggregate. Based on
their current estimate of the values of the combined companies and of Vast, the
companies expect that the tax liability will be less than this amount, and that
the liability would not be material. In addition, again based on these expected
values, Arch expects that the merger and the exchange offer will result in the
elimination of substantially all of the tax benefit of the net operating loss
carryforwards and other tax attributes of Arch which would otherwise be
available to offset future taxable income of the combined Arch and PageNet
companies.

                                       40
<PAGE>   48

                                 CAPITALIZATION

     The following table sets forth the capitalization of PageNet and Arch at
June 30, 2000 and the capitalization of Arch as adjusted to give effect to the
Arch exchange offer and merger, assuming 100% of the currently outstanding Arch
discount notes are exchanged. You should read this table together with the other
financial information appearing elsewhere in this proxy statement.

<TABLE>
<CAPTION>
                                                                     HISTORICAL           AS ADJUSTED
                                                              ------------------------    -----------
                                                               PAGENET         ARCH         ARCH(1)
                                                              ----------    ----------    -----------
                                                                      (DOLLARS IN THOUSANDS)
<S>                                                           <C>           <C>           <C>
ARCH CURRENT MATURITIES OF LONG-TERM DEBT...................  $       --    $   14,310    $   14,310
                                                              ----------    ----------    ----------
PAGENET LONG-TERM DEBT IN DEFAULT:
  Credit agreement and letters of credit....................     746,450            --            --
  8.875% senior subordinated notes due February 1, 2006.....     300,000            --            --
  10.125% senior subordinated notes due August 1, 2007......     400,000            --            --
  10% senior subordinated notes due October 15, 2008........     500,000            --            --
                                                              ----------    ----------    ----------
                                                               1,946,450            --            --

PAGENET OTHER LONG-TERM OBLIGATIONS.........................      59,507            --            --
ARCH LONG-TERM DEBT, LESS CURRENT MATURITIES:
  Senior bank debt..........................................          --       449,630     1,264,630
  10 7/8% senior discount notes due 2008....................          --       159,628            --
  6 3/4% convertible subordinated debentures due 2003.......          --           959           959
  12 3/4% senior notes due 2007.............................          --       128,028       128,028
  13 3/4% senior notes due 2008.............................          --       140,766       140,766
  9 1/2% senior notes due 2004..............................          --       125,000       125,000
  14% senior notes due 2004.................................          --       100,000       100,000
  Other.....................................................          --            --        59,507
                                                              ----------    ----------    ----------
         Total long-term debt (including long-term debt in
           default), less current maturities................   2,005,957     1,104,011     1,818,890
                                                              ----------    ----------    ----------
Redeemable convertible preferred stock......................          --        43,953            --
PAGENET STOCKOWNERS' EQUITY:
Preferred stock -- $.01 par value, authorized 25,000,000
  shares, no shares issued or outstanding...................          --            --            --
Common stock -- $.01 par value, authorized 250,000,000
  shares (no shares as adjusted), issued and outstanding
  104,232,567 shares........................................       1,042            --            --
Additional paid-in capital..................................     134,742            --            --
Accumulated other comprehensive income......................       1,614            --            --
Accumulated deficit.........................................  (1,047,420)           --            --
ARCH STOCKHOLDERS' EQUITY:
Preferred stock -- $.01 par value, authorized 10,000,000
  shares, issued and outstanding 250,000 shares ($29,310
  aggregate liquidation preference).........................          --             3             3
Common stock and Class B common stock.......................
$.01 par value, authorized 160,000,000 shares (225,000,000
  as adjusted), issued and outstanding 66,078,561
  (174,008,068 as adjusted).................................          --           661         1,740
Additional paid-in capital..................................          --       817,116     1,469,913
Accumulated deficit.........................................          --      (962,911)     (874,901)
                                                              ----------    ----------    ----------
         Total stockholders' equity (deficit)...............    (910,022)     (145,131)      596,755
                                                              ----------    ----------    ----------
         Total capitalization...............................  $1,095,935    $1,017,143    $2,429,955
                                                              ==========    ==========    ==========
</TABLE>

---------------

(1) If 1% of the currently outstanding Arch discount notes are exchanged, total
    long-term debt, less current maturities would be $2.0 billion, total
    stockholders' equity would be $441.7 million and total capitalization would
    be $2.4 billion.

                                       41
<PAGE>   49

                UNAUDITED PRO FORMA CONSOLIDATED FINANCIAL DATA
                            OF THE COMBINED COMPANY

     The following unaudited selected pro forma data of the combined company
gives effect to the following transactions as if they were consummated as of
June 30, 2000 with respect to the unaudited pro forma balance sheet, except for
Arch's acquisition of MobileMedia which closed prior to December 31, 1999, and
on January 1, 1999 with respect to the unaudited pro forma statements of
operations:

     - Arch's acquisition of MobileMedia, which closed on June 3, 1999;

     - the exchange of $159.6 million (accreted value at June 30, 2000) of Arch
       discount notes for 11.4 million shares of Arch common stock in Arch's
       exchange offer;

     - the conversion of $44.0 million of Arch Series D preferred stock into
       approximately 6.6 million shares of Arch common stock upon completion of
       the merger; and

     - Arch's merger with PageNet.

     The following selected pro forma financial information should be read in
conjunction with the unaudited pro forma condensed consolidated financial
statements and notes. The financial impact of expected operational cost
synergies resulting from the merger of PageNet and Arch and Arch's acquisition
of MobileMedia is excluded from this presentation.

EFFECTS OF THE MERGER

     PageNet has identified several factors that have contributed to its
deteriorating financial results and liquidity. See "PageNet Management's
Discussion and Analysis of Financial Conditions and Results of Operations."
These include declines in units in service and cash flows resulting from
increased pricing by PageNet, reduced demand and increased competition for
traditional paging services, and problems encountered in converting to new
billing and customer service systems. Reduced cash flows from operations caused
PageNet to be in default under its credit facilities and the covenants relating
to its senior subordinated notes.

     As part of the merger, all of the PageNet senior subordinated notes will be
converted into Arch common stock, eliminating the accrued or future interest
payments associated with this indebtedness. The combined company will have
access to Arch's amended credit facility as a source of additional liquidity.
Arch also anticipates that the integration of management and information
functions can result in lower operating expenses, although such reductions will
require 12 to 18 months to achieve. As a result of these and other factors, Arch
and PageNet believe the combined company should not experience the liquidity
problems currently faced by PageNet.

     Arch does not anticipate that the combined company will increase prices for
traditional paging services. Arch also anticipates that the combined company
will have access to sufficient funding to more broadly introduce advanced
messaging services that it expects to be in greater demand and that it expects
to be more competitive with alternative wireless messaging services.

     If Arch acquires PageNet as described in this proxy statement, the combined
company will have substantially larger assets, liabilities, revenues and
expenses. On a pro forma basis at June 30, 2000, the combined company would have
had approximately 14.0 million units in service, total assets of $2.8 billion
and total long term debt of $1.8 million, assuming that all of the outstanding
discount notes are exchanged for common stock. For the year ended December 31,
1999, the combined company would have had pro forma total revenues of $1.7
billion, adjusted pro forma earnings before interest, income taxes, depreciation
and amortization of $471.0 million, and net loss before extraordinary items and
cumulative effect of a change in accounting principle of $435.0 million. This
pro forma net loss excludes the effects of an extraordinary gain relating to the
extinguishment of debt of $7.0 million and the negative $40.8 million cumulative
effect of an accounting change relating to Arch's and PageNet's original
application of Statement of Position 98-5 "Reporting on the Costs of Start-Up
Activities." For the six months ended June 30, 2000, the combined company would
have had pro forma total revenues of $814.5 million,

                                       42
<PAGE>   50

adjusted pro forma earnings before interest, income taxes, depreciation and
amortization of $215.4 million and a net loss before extraordinary items and
cumulative effect of a change in accounting principle of $228.6 million. This
pro forma net loss excludes the effect of an extraordinary gain of $52.1 million
relating to the extinguishment of Arch debt. This amount also excludes the
impact of expected operational cost synergies. For the year ended December 31,
1999, the combined company's pro forma cash flows provided by operating
activities, used in investing activities and provided by financing activities
would have been $325.2 million, $894.7 million and $717.7 million, respectively.
For the six months ended June 30, 2000, the combined company's pro forma cash
flows provided by operating activities, used in investing activities and
provided by financing activities were $159.4 million, $82.3 million and $27.9
million, respectively. The adjusted pro forma cash flow information assumes that
the merger and related transactions had been effected as of January 1, 1999.
Leverage for the combined company on a pro forma basis, as measured by the ratio
of total debt to annualized adjusted pro forma earnings before interest, income
taxes, depreciation and amortization for the year ended December 31, 1999, and
six months ended June 30, 2000 would have been 3.8 to 1.0 and 4.3 to 1.0,
respectively. This also excludes the impact of expected operational cost
synergies. Adjusted pro forma earnings before interest, income taxes,
depreciation and amortization is earnings before interest, income taxes,
depreciation and amortization, net of restructuring charges, bankruptcy related
expenses, equity in loss of affiliates, income tax benefit, interest and
non-operating expenses (net) and extraordinary items. The PageNet merger is
expected to increase amortization charges by approximately $63.6 million per
year.

     As noted above, Arch and PageNet have experienced significant net losses in
the past and on a combined pro forma basis for the year ended December 31, 1999
and the six months ended June 30, 2000. Arch expects that the combined company
will continue to experience net losses and can give no assurance about when, if
ever, it will attain profitability. As also noted above, the combined company
pro forma cash flows provided by operating activities were positive for the year
ended December 31, 1999 and the six months ended June 30, 2000. While Arch
expects the cash provided by operating activities of the combined company will
remain positive in future periods, it can give no assurance that it will remain
positive.

     Following the merger, PageNet customers will be converted to Arch's billing
and customer service systems. Arch believes that its billing and customer
service systems have the capacity to handle all of the customers of the combined
company. Arch has significant experience consolidating multiple billing and
customer service systems as a result of prior acquisitions, including its recent
acquisition of MobileMedia. Arch believes that its acquisition of MobileMedia
demonstrates that elements of an otherwise insolvent business can become useful
assets under Arch's management.

SELECTED PRO FORMA DATA

     The pro forma information is presented for illustrative purposes only and
does not necessarily predict the operating results or financial position that
would have occurred if the merger of PageNet and Arch and Arch's acquisition of
MobileMedia had been consummated as of the dates indicated above. Nor does it
predict the future operating results or financial position of Arch following the
merger and the MobileMedia acquisition.

                                       43
<PAGE>   51

<TABLE>
<CAPTION>
                                                                                   SIX MONTHS
                                                                 YEAR ENDED           ENDED
                                                              DECEMBER 31, 1999   JUNE 30, 2000
                                                              -----------------   -------------
                                                                   (DOLLARS IN THOUSANDS)
<S>                                                           <C>                 <C>
STATEMENTS OF OPERATIONS DATA:
Service, rental and maintenance revenues....................     $ 1,651,502       $   746,933
Product sales...............................................         152,017            67,555
                                                                 -----------       -----------
          Total revenues....................................       1,803,519           814,488
Cost of products sold.......................................        (113,891)          (53,404)
                                                                 -----------       -----------
                                                                   1,689,628           761,084
Operating Expenses:
  Service, rental and maintenance...........................         440,534           202,964
  Selling...................................................         204,777            84,700
  General and administrative................................         573,294           258,032
  Depreciation and amortization.............................         682,403           338,685
  Restructuring charge......................................         (25,731)               --
  Provision for asset impairment............................          17,798                --
  Bankruptcy related expenses...............................          14,938                --
                                                                 -----------       -----------
Operating income (loss).....................................        (218,385)         (123,297)
Interest and other income (expense).........................        (216,407)         (105,324)
                                                                 -----------       -----------
Income (loss) before income tax provision...................        (434,792)         (228,621)
Income tax provision........................................             209                --
                                                                 -----------       -----------
Net income (loss)...........................................     $  (435,001)      $  (228,621)
                                                                 ===========       ===========
Basic/diluted income (loss) per share.......................     $     (2.56)      $     (1.33)
                                                                 ===========       ===========
Other Operating Data:
Capital expenditures, excluding acquisitions................     $   354,808       $    79,410
Units in service at end of period(1)........................      15,500,000        14,030,000
</TABLE>

<TABLE>
<CAPTION>
                                                                                      AS OF
                                                                                  JUNE 30, 2000
                                                                                  -------------
<S>                                                           <C>                 <C>
BALANCE SHEET DATA:
Current assets..............................................                       $   259,020
Total assets................................................                         2,853,128
Long-term debt, less current maturities.....................                         1,818,890
Stockholders' equity........................................                           596,755
</TABLE>

---------------
(1) Units in service is calculated by adding the Arch and PageNet units in
    service less an elimination for intercompany units in service.

                                       44
<PAGE>   52

        UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

     The following unaudited pro forma financial statements of Arch and PageNet
give effect to the following transactions as if they were consummated as of June
30, 2000 with respect to the unaudited pro forma balance sheet, except for
Arch's acquisition of MobileMedia which closed prior to December 31, 1999, and
on January 1, 1999 with respect to the unaudited pro forma statements of
operations:

     - Arch's acquisition of MobileMedia, which closed on June 3, 1999;

     - the exchange of $159.6 million (accreted value at June 30, 2000) of Arch
       discount notes for 11.4 million shares of Arch common stock;

     - the conversion of $44.0 million of Arch Series D preferred stock into
       approximately 6.6 million shares of Arch common stock upon completion of
       the merger; and

     - Arch's merger with PageNet.

     The pro forma financial statements utilize the purchase method of
accounting for the merger of Arch and PageNet. Arch is the acquiring company for
accounting purposes. Under the purchase method of accounting, the purchase price
is allocated to assets acquired and liabilities assumed based on their estimated
fair value at the time of the merger. Income of the combined company will not
include income or loss of PageNet prior to the merger. The pro forma condensed
consolidated financial statements reflect preliminary pro forma adjustments made
to combine Arch with PageNet using the purchase method of accounting. The actual
adjustments will be made after the closing and may differ from those reflected
in the pro forma financial statements, however Arch does not believe that they
will materially differ from the final purchase price allocation.

     The pro forma condensed consolidated financial data is for information
purposes only and is not necessarily indicative of the results of future
operations of the combined company or the actual results that would have been
achieved had the merger of Arch and PageNet and Arch's acquisition of
MobileMedia been consummated during the periods indicated. You should read the
unaudited pro forma financial data in conjunction with the consolidated
historical financial statement of Arch, PageNet and MobileMedia, including the
notes to all sets of financial statements.

                                       45
<PAGE>   53

                        ARCH COMMUNICATIONS GROUP, INC.

           UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEETS
                                 JUNE 30, 2000
                             (DOLLARS IN THOUSANDS)
<TABLE>
<CAPTION>
                                                          PRO FORMA
                                                       ADJUSTMENTS FOR
                                                        ARCH EXCHANGE          ADJUSTED
                                         ARCH        --------------------        ARCH         PAGENET
                                     (HISTORICAL)     DEBIT       CREDIT      PRO FORMA     (HISTORICAL)
                                     ------------    --------     -------     ----------    ------------
<S>                                  <C>             <C>          <C>         <C>           <C>
ASSETS
Current assets:
  Cash and cash equivalents........   $    3,858                              $    3,858    $    71,111
  Accounts receivable, net.........       63,368                                  63,368         82,782
  Inventories......................        7,246                                   7,246          6,340
  Prepaid expenses and other              16,306                                  16,306         15,810
                                      ----------                              ----------    -----------
        Total current assets.......       90,778                                  90,778        176,043
  Property and equipment, net......      382,238                                 382,238        659,391
  Intangible and other assets......      778,210                                 778,210        515,785
                                      ----------                              ----------    -----------
                                      $1,251,226                              $1,251,226    $ 1,351,219
                                      ==========                              ==========    ===========
LIABILITIES AND STOCKHOLDERS'
  EQUITY (DEFICIT)
Current liabilities:
  Current maturities of long-term
    debt...........................   $   14,310                              $   14,310
  Long-term debt in default........                                                         $ 1,946,450
  Accounts payable.................       48,122                                  48,122         70,813
  Accrued expenses.................       32,607                  $ 3,000(1)      35,607         46,153
  Accrued interest.................       30,200                                  30,200         99,185
  Customer deposits and deferred
    revenue........................       31,628                                  31,628         39,133
  Accrued restructuring, current
    portion........................       12,754                                  12,754             --
                                      ----------                              ----------    -----------
        Total current
          liabilities..............      169,621                                 172,621      2,201,734
  Long-term debt, less current
    maturities.....................    1,104,011     $159,628(1)                 944,383         59,507
  Accrued restructuring,
    non-current portion............                                                                  --
  Other long-term liabilities......       78,772                                  78,772
  Redeemable convertible preferred
    stock..........................       43,953                                  43,953

STOCKHOLDERS' EQUITY (DEFICIT)
  Preferred stock..................            3                                       3             --
  Common stock.....................          661                      114(1)         775          1,042
  Additional paid-in capital.......      817,116                   68,504(1)     885,620        134,742
  Accumulated other comprehensive
    income.........................                                                               1,614
  Accumulated deficit..............     (962,911)                  88,010(1)    (874,901)    (1,047,420)
                                      ----------                              ----------    -----------
        Total stockholders' equity
          (deficit)................     (145,131)                                 11,497       (910,022)
                                      ----------                              ----------    -----------
                                      $1,251,226                              $1,251,226    $ 1,351,219
                                      ==========                              ==========    ===========

<CAPTION>
                                             PRO FORMA
                                            ADJUSTMENTS
                                             FOR MERGER
                                     --------------------------      PRO FORMA
                                       DEBIT           CREDIT       CONSOLIDATED
                                     ----------      ----------     ------------
<S>                                  <C>             <C>            <C>
ASSETS
Current assets:
  Cash and cash equivalents........                  $    5,733(2)   $   69,236
  Accounts receivable, net.........                       1,797(2)      144,353
  Inventories......................                                      13,586
  Prepaid expenses and other                                271(2)       31,845
                                                                     ----------
        Total current assets.......                                     259,020
  Property and equipment, net......                       2,586(2)    1,039,043
  Intangible and other assets......  $  287,232(2)   $   26,162(2)    1,555,065
                                                                     ----------
                                                                     $2,853,128
                                                                     ==========
LIABILITIES AND STOCKHOLDERS'
  EQUITY (DEFICIT)
Current liabilities:
  Current maturities of long-term
    debt...........................                                  $   14,310
  Long-term debt in default........  $1,946,450(2)                           --
  Accounts payable.................       1,364(2)                      117,571
  Accrued expenses.................         501(2)                       81,259
  Accrued interest.................      96,948(2)                       32,437
  Customer deposits and deferred
    revenue........................         381(2)                       70,380
  Accrued restructuring, current
    portion........................                      30,000(2)       42,754
                                                                     ----------
        Total current
          liabilities..............                                     358,711
  Long-term debt, less current
    maturities.....................                      70,000(2)    1,818,890
                                                        745,000(2)
  Accrued restructuring,
    non-current portion............                                          --
  Other long-term liabilities......                                      78,772
  Redeemable convertible preferred
    stock..........................      43,953(16)                          --
STOCKHOLDERS' EQUITY (DEFICIT)
  Preferred stock..................                                           3
  Common stock.....................       1,042(2)          899(2)        1,740
                                                             66(16)
  Additional paid-in capital.......     134,742(2)      540,406(2)    1,469,913
                                                         43,887(16)          --
  Accumulated other comprehensive
    income.........................       1,614(2)
  Accumulated deficit..............                   1,047,420(2)     (874,901)
                                                                     ----------
        Total stockholders' equity
          (deficit)................                                     596,755
                                                                     ----------
                                                                     $2,853,128
                                                                     ==========
</TABLE>

                                       46
<PAGE>   54

                        ARCH COMMUNICATIONS GROUP, INC.

      UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1999
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
<TABLE>
<CAPTION>
                                                                      PRO FORMA         PRO FORMA
                                                                     ADJUSTMENTS       ADJUSTMENTS       ADJUSTED
                                         ARCH       MOBILEMEDIA    FOR MOBILEMEDIA      FOR ARCH           ARCH        PAGENET
                                     (HISTORICAL)   (HISTORICAL)     ACQUISITION        EXCHANGE        PRO FORMA    (HISTORICAL)
                                     ------------   ------------   ---------------     -----------      ----------   ------------
<S>                                  <C>            <C>            <C>                 <C>              <C>          <C>
Service, rental and maintenance
 revenues..........................   $  591,389      $167,318       $   (3,521)(3)                     $  755,186   $   897,348
Product sales......................       50,435         9,207                                              59,642        92,375
                                      ----------      --------                                          ----------   -----------
Total revenues.....................      641,824       176,525                                             814,828       989,723
Cost of products sold..............      (34,954)       (6,216)                                            (41,170)      (57,901)
                                      ----------      --------                                          ----------   -----------
                                         606,870       170,309                                             773,658       931,822
Operating expenses:
 Service, rental and maintenance...      132,400        44,530           (3,521)(3)                        173,409       267,043
 Selling...........................       84,249        23,115                                             107,364        97,413
 General and administrative........      180,726        51,562                                             232,288       361,386
 Depreciation and amortization.....      309,434        45,237            2,958(4)                         369,329       327,101
                                                                         11,700(4)
 Provision for asset impairment....                                                                                       17,798
 Restructuring charge..............       (2,200)                                                           (2,200)      (23,531)
 Bankruptcy related expenses.......                     14,938                                              14,938
                                      ----------      --------                                          ----------   -----------
Total operating expenses...........      704,609       179,382                                             895,128     1,047,210
                                      ----------      --------                                          ----------   -----------
Operating income (loss)............      (97,739)       (9,073)                                           (121,470)     (115,388)
 Interest expense, net.............     (143,028)      (17,660)          17,660(5)     $   15,031(6)      (128,574)     (150,921)
                                                                        (16,839)(5)        16,262(15)
 Other income (expense)............      (48,421)        1,435                                             (46,986)        4,753
                                      ----------      --------                                          ----------   -----------
Income (loss) before income tax
 provisions, extraordinary item and
 cumulative effect of accounting
 change............................     (289,188)      (25,298)                                           (297,030)     (261,556)
Provision for income taxes.........           --           209                                                 209            --
                                      ----------      --------                                          ----------   -----------
Income (loss) before extraordinary
 item and cumulative effect of
 accounting change.................   $ (289,188)     $(25,507)                                         $ (297,239)  $  (261,556)
                                      ==========      ========                                          ==========   ===========
Basic/diluted income (loss) per
 share before extraordinary item
 and cumulative effect of
 accounting change(17).............   $    (9.21)                                                       $    (4.04)  $     (2.52)
                                      ==========                                                        ==========   ===========
                                                                                        1,793,576(14)
                                                                                       11,398,483(1)
Weighted average common shares
 outstanding(17)...................   31,603,410                     17,181,660(13)    11,640,321(15)   73,617,450   103,960,240

<CAPTION>

                                      PRO FORMA
                                     ADJUSTMENTS        PRO FORMA
                                      FOR MERGER       CONSOLIDATED
                                     ------------      ------------
<S>                                  <C>               <C>
Service, rental and maintenance
 revenues..........................  $     (1,032)(7)  $ 1,651,502
Product sales......................                        152,017
                                                       -----------
Total revenues.....................                      1,803,519
Cost of products sold..............       (14,820)(9)     (113,891)
                                                       -----------
                                                         1,689,628
Operating expenses:
 Service, rental and maintenance...            82(7)       440,534
 Selling...........................                        204,777
 General and administrative........       (20,380)(7)      573,294
 Depreciation and amortization.....       (77,559)(9)      682,403
                                           63,532(10)
 Provision for asset impairment....                         17,798
 Restructuring charge..............                        (25,731)
 Bankruptcy related expenses.......                         14,938
                                                       -----------
Total operating expenses...........                      1,908,013
                                                       -----------
Operating income (loss)............                       (218,385)
 Interest expense, net.............       121,729(8)      (174,034)
                                          (25,676)(11)
                                            9,408(16)
 Other income (expense)............          (140)(7)      (42,373)
                                                       -----------
Income (loss) before income tax
 provisions, extraordinary item and
 cumulative effect of accounting
 change............................                       (434,792)
Provision for income taxes.........                            209
                                                       -----------
Income (loss) before extraordinary
 item and cumulative effect of
 accounting change.................                    $  (435,001)
                                                       ===========
Basic/diluted income (loss) per
 share before extraordinary item
 and cumulative effect of
 accounting change(17).............                    $     (2.56)
                                                       ===========
                                        6,613,180(16)
                                     (103,960,240)(2)
Weighted average common shares
 outstanding(17)...................    89,917,844(2)   170,148,474
</TABLE>

                                       47
<PAGE>   55

                        ARCH COMMUNICATIONS GROUP, INC.

      UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                     FOR THE SIX MONTHS ENDED JUNE 30, 2000
           (DOLLARS IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                PRO FORMA
                                               ADJUSTMENTS         ADJUSTED                       PRO FORMA
                                   ARCH         FOR ARCH             ARCH         PAGENET        ADJUSTMENTS          PRO FORMA
                               (HISTORICAL)     EXCHANGE          PRO FORMA     (HISTORICAL)     FOR MERGER          CONSOLIDATED
                               ------------    -----------        ----------    ------------    -------------        ------------
<S>                            <C>             <C>                <C>           <C>             <C>                  <C>
Service, rental and
  maintenance revenues.......   $  353,291                        $ 353,291     $   396,157     $      (2,515)(7)    $   746,933
Product sales................       24,556                           24,556          42,999                               67,555
                                ----------                        ----------    -----------                          -----------
        Total revenues.......      377,847                          377,847         439,156                              814,488
Cost of products sold........      (17,261)                         (17,261)        (26,236)           (9,907)(9)        (53,404)
                                ----------                        ----------    -----------                          -----------
                                   360,586                          360,586         412,920                              761,084
Operating expenses:
      Service, rental and
        maintenance..........       76,954                           76,954         125,240               770(7)         202,964
      Selling................       49,378                           49,378          35,322                               84,700
      General and
        administrative.......      109,296                          109,296         159,934           (11,198)(7)        258,032
      Depreciation and
        amortization.........      180,589                          180,589         121,825             4,459(9)         338,685
                                                                                                       31,812(10)
                                ----------                        ----------    -----------                          -----------
        Total operating
          expenses...........      416,217                          416,217         442,321                              884,381
                                ----------                        ----------    -----------                          -----------
Operating income (loss)......      (55,631)                         (55,631)        (29,401)                            (123,297)
      Interest expense,
        net..................      (76,699)        10,730(6)        (65,969)        (93,123)           60,760(8)        (104,016)
                                                                                                       (9,108)(11)
                                                                                                        3,424(16)
      Other income
        (expense)............       (2,010)                          (2,010)            889              (187)(7)         (1,308)
                                ----------                        ----------    -----------                          -----------
Income (loss) before income
  tax provisions,
  extraordinary item and
  cumulative effect of
  accounting change..........     (134,340)                        (123,610)       (121,635)                            (228,621)
Provision for income taxes...           --                               --              --                                   --
                                ----------                        ----------    -----------                          -----------
Income (loss) before
  extraordinary item and
  cumulative effect of
  accounting change..........   $ (134,340)                       $(123,610)    $  (121,635)                         $  (228,621)
                                ==========                        ==========    ===========                          ===========
Basic/diluted income (loss)
  per share before
  extraordinary item and
  cumulative effect of
  accounting change (17).....   $    (2.26)                       $   (1.63)    $     (1.17)                         $     (1.33)
                                ==========                        ==========    ===========                          ===========
                                                                                                    6,613,180(16)
                                               11,398,483(1)                                     (104,242,567)(2)
Weighted average common
  shares outstanding (17)....   60,555,685      3,845,148(15)     75,799,316    104,242,567        89,917,844(2)     172,330,340
</TABLE>

                                       48
<PAGE>   56

    NOTES TO UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

 1) To record the issuance of 11,398,483 shares of Arch common stock valued at
    $6.02 per share in exchange for $159.6 million (accreted value, representing
    $172.4 million of principal amount) of Arch discount notes. The value of
    Arch discount notes used in the preparation of these pro forma financial
    statements reflect the value of discount notes remaining after giving effect
    to privately negotiated exchange transactions which have taken place in 2000
    referred to in notes 15 and 16 of the notes to the unaudited pro forma
    condensed consolidated financial statements.

 2) To record the issuance of 81,197,837 shares of Arch common stock and
    12,100,000 shares of Vast Class B common stock in exchange for $1.2 billion
    principal amount of PageNet senior subordinated notes plus accrued interest
    and 8,720,007 shares of Arch common stock and the distribution of 4,000,000
    shares of Vast Class B common stock in exchange for all of the outstanding
    common stock of PageNet:

     - This adjustment includes the elimination of all of approximately $96.9
       million of accrued interest on PageNet's senior subordinated notes and
       the write-off of $19.2 million and $7.6 million of deferred financing
       costs associated with PageNet's senior subordinated notes and its
       domestic revolving credit agreement, respectively, which Arch will not
       assume as part of this transaction.

     - This adjustment also includes the elimination of all consolidated amounts
       related to Vast and the recording of Arch's net investment in Vast as a
       component of intangible and other assets following the reduction of
       PageNet's ownership of Vast to below 50%. Additionally, the adjustment
       reflects the forgiveness of $59.1 million of intracompany indebtedness
       between PageNet and Vast, which is required under the merger agreement
       and is a condition to the consummation of the Vast distribution.

                                       49
<PAGE>   57

          This historical book value of the tangible and intangible assets of
     PageNet was assumed to approximate fair value as Arch believes that they
     will not materially differ from the final purchase price allocation. The
     excess of purchase prices over the assumed fair value of identifiable
     assets acquired was calculated as follows (in thousands):

<TABLE>
<S>                                                           <C>
Consideration Exchanged:
  Fair value of shares issued to PageNet stockholders and
     noteholders(approximately 89,917,844 shares at $6.02
     per share).............................................  $  541,305
Liabilities Assumed:
  Bank debt.................................................     745,000
  Other long-term debt......................................      59,507
  Accounts payable..........................................      69,449
  Accrued expenses..........................................      45,652
  Accrued interest..........................................       2,237
  Customer deposits and deferred revenue....................      38,752
  PageNet closing costs.....................................      41,000(a)
                                                              ----------
Total consideration exchanged...............................   1,542,902
Transaction costs...........................................      29,000(b)
Restructuring reserve.......................................      30,000(c)
                                                              ----------
Total purchase price........................................   1,601,902
Less fair value of tangible and intangible net assets
  acquired:
  Cash and cash equivalents.................................      65,378
  Accounts receivable, net..................................      80,985
  Inventories...............................................       6,340
  Prepaid expenses and other................................      15,539
  Property and equipment, net...............................     656,805
  Intangible and other assets...............................     489,623(d)
                                                              ----------
                                                              $1,314,670
                                                              ==========
Excess of purchase price over tangible and intangible assets
  acquired..................................................  $  287,232
                                                              ==========
</TABLE>

---------------

          (a) PageNet closing costs consist primarily of investment banking,
     financing and other costs which will be paid to PageNet's financial
     advisors by Arch at the time of closing.

          (b) Transaction costs include legal, investment banking, financing,
     accounting and other costs incurred by Arch to consummate the PageNet
     merger.

          (c) Restructuring reserve consists of severance costs related
     primarily to duplicative general and administrative functions at the
     corporate, regional and market levels of PageNet, such as technical,
     marketing, finance, and other support functions to be recorded in
     accordance with Emerging Issue Task Force Consensus 95-3. These
     terminations will occur as operations of PageNet are integrated into those
     of Arch and are based on management's preliminary review of synergies that
     exist between the two companies. The analysis is expected to be finalized
     after consummation of the PageNet acquisition and may result in additional
     amounts to be reserved but is not expected to be materially different from
     the amount disclosed above.

          (d) Intangible and other assets are shown net of the $7.6 million
     elimination of deferred financing costs discussed earlier in this note 2.

     3) To eliminate revenues and expenses between Arch and MobileMedia.
Revenues and expenses between Arch and PageNet were not material in 1999 or
2000.

     4) To record amortization on the excess of purchase price over the tangible
and intangible assets in the MobileMedia acquisition on a straight-line basis in
the amount of $7.1 million for the year ended December 31, 1998 and $3.0 million
for the period ended June 3, 1999, the closing date of the

                                       50
<PAGE>   58

MobileMedia acquisition. The amortization relates to $400.4 million assumed fair
value of intangible assets, consisting primarily of customer lists with an
assumed fair value of $239.7 million and FCC licenses with an assumed fair value
of $143.0 million. The MobileMedia historical amortization was adjusted by $11.7
million for the period ended June 3, 1999, the closing date of the MobileMedia
acquisition, to conform MobileMedia's 25 year estimated useful life for FCC
licenses to Arch's 10 year estimated useful life and to conform MobileMedia's 2
year estimated useful life for acquired customer lists to Arch's 5 year
estimated useful life.

     5)  To remove the interest expense associated with the various MobileMedia
credit facilities and notes terminated as a result of its insolvency proceedings
and to record the interest associated with Arch's additional borrowings to
finance the MobileMedia acquisition. Interest was calculated using an 11% rate
on $181.0 million of bank borrowings and a 14.75% rate on $139.0 million senior
discount notes.

     6)  To remove the interest expense associated with Arch's discount notes
which will be converted into common stock in connection with the Arch exchange
offer.

     7)  To remove the operating results of Vast, which shares will be
distributed as part of the overall transaction involving Arch and PageNet. This
adjustment removes only the direct expenses of Vast, as no expenses allocated to
Vast by PageNet were assumed to be eliminated as a result of the distribution.

     8) To remove the interest expenses associated with PageNet's senior
subordinated notes which will be converted into common stock as part of the
PageNet exchange as well as the amortization of PageNet's deferred financing
costs which are included in interest expenses.

     9) To adjust PageNet's 1999 and 2000 cost of sales and depreciation to be
consistent with Arch's pager useful life of three years per unit.

     10) To record amortization of the excess of purchase price over the
tangible and intangible assets in the PageNet acquisition on a straight-line
basis of $28.7 million for the year ended December 31, 1999 and $14.4 million
for the six months ended June 30 , 2000. It is Arch's policy to amortize
goodwill on a straight-line basis over 10 (ten) years. The actual amortization
recorded after consummation of the PageNet transaction may differ from these
amounts due to the full allocation of purchase price to assets and liabilities
assumed pursuant to APB No. 16. The amortization relates to $450.9 million
assumed fair value of intangible assets consisting primarily of FCC licenses
with an assumed fair value of $425.7 million and goodwill with an assumed fair
value of $25.2 million. PageNet's historical amortization was adjusted by $34.9
million for the year ended December 31, 1999 and $17.5 million for the six
months ended June 30, 2000 to conform PageNet's 40 year estimated useful life of
FCC licenses and goodwill to Arch's 10 year estimated useful life.

     11) To record additional interest expense on pro forma consolidated bank
debt. Interest was calculated assuming a 10% interest rate on the average bank
debt outstanding for the periods indicated. Additional interest expense on bank
borrowings would be as follows if interest rates were to increase or decrease by
1/8 of a percent (in thousands):

<TABLE>
<CAPTION>
                                                         ASSUMED INTEREST EXPENSES
                                              -----------------------------------------------
                                                     YEAR ENDED             SIX MONTHS ENDED
      ASSUMED CHANGE IN INTEREST RATE             DECEMBER 31, 1999          JUNE 30, 2000
      -------------------------------         -------------------------    ------------------
<S>                                           <C>                          <C>
Increase of  1/8%...........................           $27,146                   $9,907
Decrease of  1/8%...........................           $24,206                   $8,309
</TABLE>

                                       51
<PAGE>   59

     12) The pro forma financial statements of Arch assume 100% conversion of
Arch's $159.6 million (accreted value) discount notes. The following table
illustrates the impact on Arch's pro forma financial statements as of December
31, 1999 and June 30, 2000 in the event that only 1% of discount noteholders
elect to convert their discount notes into Arch common stock (in thousands,
except per share amounts):

<TABLE>
<CAPTION>
                                                                ASSUMING
                                                                   1%
                                                              DISCOUNT NOTE
                                                               CONVERSION
                                                              -------------
<S>                                                           <C>
Total long-term debt, less current maturities...............   $1,976,922
Total stockholders' equity..................................   $  441,692
Interest expense, net
  Year ended December 31, 1999..............................   $ (186,929)
  Six months ended June 30, 2000............................   $ (114,639)
Income (loss) before extraordinary item and cumulative
  effect of accounting change
  Year ended December 31, 1999..............................   $ (447,896)
  Six months ended June 30, 2000............................   $ (239,244)
Basic/diluted income (loss) per common share before
  extraordinary item and cumulative effect of accounting
  change
  Year ended December 31, 1999..............................   $    (2.82)
  Six months ended June 30, 2000............................   $    (1.49)
</TABLE>

     13) To record issuance of Arch common stock in conjunction with the
MobileMedia acquisition.

     14) To record issuance of Arch common stock in conjunction with the
repurchase of $16.3 million accreted value of discount notes in October 1999.

     15) To remove interest expense and record issuance of Arch common stock in
conjunction with the repurchase of $157.4 million accreted value of discount
notes in February and March 2000.

     16) To record the exchange of $91.1 million ($100 million maturity value)
accreted value of Arch's discount notes for $44.0 million of Arch's Series D
preferred stock in May 2000 and to adjust related interest expense and debt
issuance costs for the discount notes exchanged. The Series D preferred stock
was issued to Resurgence Asset Management and will be convertible into 6,613,180
shares of Arch common stock at any time at the option of Resurgence or will be
subject to mandatory conversion into common stock upon the completion of the
PageNet merger. The exchange of the discount notes resulted in a gain of $44.4
million.

     17) All share information reflects a 1-for-3 reverse stock split effected
by Arch during June 1999.

                                       52
<PAGE>   60

     SELECTED HISTORICAL CONSOLIDATED FINANCIAL AND OPERATING DATA -- ARCH

     The following table sets forth selected historical consolidated financial
and operating data of Arch for each of the five years ended December 31, 1999
and the six months ended June 30, 1999 and 2000. The selected financial and
operating data as of December 31, 1995, 1996, 1997, 1998 and 1999 and for each
of the five years ended December 31, 1999 have been derived from Arch's audited
consolidated financial statements and notes. The selected financial and
operating data as of June 30, 2000 and for the six months ended June 30, 1999
and 2000 have been derived from Arch's unaudited consolidated financial
statements and notes. You should read the following consolidated financial
information in conjunction with "Arch Management's Discussion and Analysis of
Financial Condition and Results of Operations" and Arch's consolidated financial
statements and notes set forth below.

     In the following table, equity in loss of affiliate represents Arch's share
of net losses of USA Mobile Communications Holdings, Inc. for the period of time
from Arch's acquisition of its initial 37% interest in USA Mobile on May 16,
1995 through the completion of Arch's acquisition of USA Mobile on September 7,
1995 and Arch's share of net losses of Benbow PCS Ventures, Inc. since Arch's
acquisition of Westlink Holdings, Inc. in May 1996. See "Arch Management's
Discussion and Analysis of Financial Condition and Results of
Operations--Liquidity and Capital Resources."

     The extraordinary item is an extraordinary gain or loss resulting from
prepayment of indebtedness. See "Arch Management's Discussion and Analysis of
Financial Condition and Results of Operations--Results of Operations."

     Adjusted earnings before interest, income taxes, depreciation and
amortization, as determined by Arch, does not reflect restructuring charge,
equity in loss of affiliate, and extraordinary items; consequently adjusted
earnings before interest, income taxes, depreciation and amortization may not
necessarily be comparable to similarly titled data of other wireless messaging
companies. Earnings before interest, income taxes, depreciation and amortization
is commonly used by analysts and investors as a principal measure of financial
performance in the wireless messaging industry. Adjusted earnings before
interest, income taxes, depreciation and amortization is also one of the primary
financial measures used to calculate whether Arch and its subsidiaries are in
compliance with financial covenants under their debt agreements. These
covenants, among other things, limit the ability of Arch and its subsidiaries
to: incur additional indebtedness, make investments, pay dividends, grant liens
on its assets, merge, sell or acquire assets, repurchase or redeem capital
stock, incur capital expenditures and prepay certain indebtedness. Earnings
before interest, income taxes, depreciation and amortization is also one of the
financial measures used by analysts to value Arch. Therefore Arch management
believes that the presentation of earnings before interest, income taxes,
depreciation and amortization provides relevant information to investors.
Earnings before interest, income taxes, depreciation and amortization should not
be construed as an alternative to operating income or cash flows from operating
activities as determined in accordance with generally accepted accounting
procedures or as a measure of liquidity. Amounts reflected as earnings before
interest, income taxes, depreciation and amortization or adjusted earnings
before interest, income taxes, depreciation and amortization are not necessarily
available for discretionary use as a result of restrictions imposed by the terms
of existing indebtedness and limitations imposed by applicable law upon the
payment of dividends or distributions, among other things. See "Arch
Management's Discussion and Analysis of Financial Condition and Results of
Operation."

     Adjusted earnings before interest, income taxes, depreciation and
amortization margin is calculated by dividing Arch's adjusted earnings before
interest, income taxes, depreciation and amortization by total revenues less
cost of products sold. Earnings before interest, income taxes, depreciation and
amortization margin is a measure commonly used in the wireless messaging
industry to evaluate a company's earnings before interest, income taxes,
depreciation and amortization relative to total revenues less cost of products
sold as an indicator of the efficiency of a company's operating structure.

                                       53
<PAGE>   61

<TABLE>
<CAPTION>
                                                                                                              SIX MONTHS
                                                                                                                 ENDED
                                                          YEAR ENDED DECEMBER 31,                              JUNE 30,
                                      ---------------------------------------------------------------   -----------------------
                                         1995         1996         1997         1998         1999          1999         2000
                                      ----------   ----------   ----------   ----------   -----------   ----------   ----------
                                             (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                                   <C>          <C>          <C>          <C>          <C>           <C>          <C>
STATEMENTS OF OPERATIONS DATA:
Service, rental and maintenance
  revenues..........................  $  138,466   $  291,399   $  351,944   $  371,154   $  591,389    $  212,809   $  353,291
Product sales.......................      24,132       39,971       44,897       42,481       50,435        21,572       24,556
                                      ----------   ----------   ----------   ----------   ----------    ----------   ----------
Total revenues......................     162,598      331,370      396,841      413,635      641,824       234,381      377,847
Cost of products sold...............     (20,789)     (27,469)     (29,158)     (29,953)     (34,954)      (14,529)     (17,261)
                                      ----------   ----------   ----------   ----------   ----------    ----------   ----------
                                         141,809      303,901      367,683      383,682      606,870       219,852      360,586
Operating expenses:
  Service, rental and maintenance...      29,673       64,957       79,836       80,782      132,400        48,386       76,954
  Selling...........................      24,502       46,962       51,474       49,132       84,249        31,044       49,378
  General and administrative........      40,448       86,181      106,041      112,181      180,726        63,021      109,296
  Depreciation and amortization.....      60,205      191,871      232,347      221,316      309,434       128,033      180,589
  Restructuring charge..............          --           --           --       14,700       (2,200)           --           --
                                      ----------   ----------   ----------   ----------   ----------    ----------   ----------
Operating income (loss).............     (13,019)     (86,070)    (102,015)     (94,429)     (97,739)      (50,632)     (55,631)
Interest and non-operating expenses,
  net...............................     (22,522)     (75,927)     (97,159)    (104,213)    (188,249)     (102,659)     (78,709)
Equity in loss of affiliate.........      (3,977)      (1,968)      (3,872)      (5,689)      (3,200)       (3,200)          --
                                      ----------   ----------   ----------   ----------   ----------    ----------   ----------
Income (loss) before income tax
  benefit, extraordinary item and
  accounting change.................     (39,518)    (163,965)    (203,046)    (204,331)    (289,188)     (156,491)    (134,340)
Income tax benefit..................       4,600       51,207       21,172           --           --            --           --
                                      ----------   ----------   ----------   ----------   ----------    ----------   ----------
Income (loss) before extraordinary
  item and accounting change........     (34,918)    (112,758)    (181,874)    (204,331)    (289,188)     (156,491)    (134,340)
Extraordinary item..................      (1,684)      (1,904)          --       (1,720)       6,963            --       52,051
Cumulative effect of accounting
  change............................          --           --           --           --       (3,361)       (3,361)          --
                                      ----------   ----------   ----------   ----------   ----------    ----------   ----------
Net income (loss)...................  $  (36,602)  $ (114,662)  $ (181,874)  $ (206,051)  $ (285,586)   $ (159,852)  $  (82,289)
                                      ==========   ==========   ==========   ==========   ==========    ==========   ==========
Basic/diluted income (loss) per
  common share before extraordinary
  item and accounting change........  $    (7.79)  $   (16.59)  $   (26.31)  $   (29.34)  $    (9.21)   $   (11.75)       (2.26)
Extraordinary item per basic/diluted
  common share......................       (0.37)       (0.27)          --        (0.25)          --            --         0.86
Cumulative effect of accounting
  change per basic/diluted common
  share.............................          --           --           --           --         0.11         (0.25)          --
                                      ----------   ----------   ----------   ----------   ----------    ----------   ----------
Basic/diluted net income (loss) per
  common share......................  $    (8.16)  $   (16.86)  $   (26.31)  $   (29.59)  $    (9.10)   $   (12.00)       (1.40)
                                      ==========   ==========   ==========   ==========   ==========    ==========   ==========
OTHER OPERATING DATA:
Capital expenditures, excluding
  acquisitions......................  $   60,468   $  165,206   $  102,769   $  113,184   $  113,651    $   57,364       77,663
Cash flows provided by operating
  activities........................  $   14,749   $   37,802   $   63,590   $   83,380   $   99,536        36,378       53,006
Cash flows used in investing
  activities........................  $ (192,549)  $ (490,626)  $ (102,769)  $  (82,868)  $ (627,166)   $ (573,428)     (77,663)
Cash flows provided by (used in)
  financing activities..............  $  179,092   $  452,678   $   39,010   $   (2,207)  $  529,158       557,302       25,354
Adjusted earnings before interest,
  income taxes, depreciation and
  amortization......................  $   47,186   $  105,801   $  130,332   $  141,587   $  209,495        77,401      124,958
Adjusted earnings before interest,
  income taxes, depreciation and
  amortization margin...............          33%          35%          35%          37%          35%           35%          35%
Units in service at end of period...   2,006,000    3,295,000    3,890,000    4,276,000    6,949,000     7,095,000    6,672,000
</TABLE>

                                       54
<PAGE>   62

<TABLE>
<CAPTION>
                                                                                              AS OF
                                                  AS OF DECEMBER 31,                         JUNE 30,
                              -----------------------------------------------------------   ----------
                               1995        1996         1997         1998         1999         2000
                              -------   ----------   ----------   ----------   ----------   ----------
BALANCE SHEET DATA:                             (DOLLARS IN THOUSANDS)
<S>                           <C>       <C>          <C>          <C>          <C>          <C>
Current assets..............  $33,671   $   43,611   $   51,025   $   50,712   $   85,303   $   90,778
Total assets................  785,376    1,146,756    1,020,720      904,285    1,353,045    1,251,226
Long-term debt, less current
  maturities................  457,044      918,150      968,896    1,001,224    1,322,508    1,104,011
Redeemable preferred
  stock.....................    3,376        3,712           --           --           --       43,953
Stockholders' equity
  (deficit).................  246,884      147,851      (33,255)    (213,463)    (217,559)    (145,131)
</TABLE>

     The following table reconciles net income to the presentation of Arch's
adjusted earnings before interest, income taxes, depreciation and amortization:

<TABLE>
<CAPTION>
                                                                                                SIX MONTHS
                                                                                                  ENDED
                                                YEAR ENDED DECEMBER 31,                          JUNE 30,
                                --------------------------------------------------------   --------------------
                                  1995       1996        1997        1998        1999        1999        2000
                                --------   ---------   ---------   ---------   ---------   ---------   --------
                                                 (DOLLARS IN THOUSANDS)
<S>                             <C>        <C>         <C>         <C>         <C>         <C>         <C>
Net income (loss).............  $(36,602)  $(114,662)  $(181,874)  $(206,051)  $(285,586)  $(159,852)  $(82,289)
Interest and non-operating
  expenses, net...............    22,522      75,927      97,159     104,213     188,249     102,659     78,709
Income tax benefit............    (4,600)    (51,207)    (21,172)         --          --          --         --
Depreciation and
  amortization................    60,205     191,871     232,347     221,316     309,434     128,033    180,589
Restructuring charge..........        --          --          --      14,700      (2,200)         --         --
Equity in loss of affiliate...     3,977       1,968       3,872       5,689       3,200       3,200         --
Extraordinary item............     1,684       1,904          --       1,720      (6,963)         --    (52,051)
Cumulative effect of
  accounting charge...........        --          --          --          --       3,361       3,361         --
                                --------   ---------   ---------   ---------   ---------   ---------   --------
Adjusted earnings before
  interest, income taxes,
  depreciation and
  amortization................  $ 47,186   $ 105,801   $ 130,332   $ 141,587   $ 209,495   $  77,401   $124,958
                                ========   =========   =========   =========   =========   =========   ========
</TABLE>

                                       55
<PAGE>   63

                  ARCH MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OVERVIEW

     The following discussion and analysis should be read in conjunction with
Arch's consolidated financial statements and notes.

     Arch derives the majority of its revenues from fixed monthly or other
periodic fees charged to subscribers for wireless messaging services. Such fees
are not generally dependant on usage. As long as a subscriber remains on
service, operating results benefit from the recurring payments of the fixed
periodic fees without incurrence of additional selling expenses. Arch's service,
rental and maintenance revenues and the related expenses exhibit substantially
similar growth trends. Arch's average revenue per subscriber has declined over
the last three years for two principal reasons:

     - primarily due to an increase in competition in certain of the markets in
       which Arch operates, particularly competition from telephone, cellular
       and PCS providers; and

     - to a lesser extent, an increase in the number of reseller customers whose
       airtime is purchased at wholesale rates.

     The reduction in average revenue per subscriber resulting from these trends
has been offset by the reduction of expenses so that Arch's margins had been
improving until the consummation of the MobileMedia merger in June 1999 which
resulted in redundant management and administrative headcount. Arch expects the
margins to improve as the integration of the two companies eliminates these
redundant expenses.

     Arch has achieved significant growth in units in service and adjusted
earnings before interest, income taxes, depreciation and amortization through
acquisitions and, prior to 1999, internal growth. During 1999, units in service
decreased by 89,000 units, excluding the addition of subscribers from the
MobileMedia acquisition. During the six months ended June 30, 2000, units in
service decreased by a further 277,000 units due to subscriber cancellations and
definitional changes. Arch believes it will experience a net decline in the
number of units in service during the remainder of 2000, excluding the addition
of subscribers, from the PageNet acquisition, as Arch's addition of advanced
messaging subscribers is likely to be exceeded by its loss of basic paging
subscribers. Arch's ability to compete against telephone, cellular and PCS
providers in providing advanced messaging services is as yet unproven. From
January 1, 1997 through December 31, 1999, Arch's total number of units in
service grew from 3.3 million to 6.9 million units. Arch's total revenues have
increased from $396.8 million in the year ended December 31, 1997 to $413.6
million in the year ended December 31, 1998 and to $641.8 million in the year
ended December 31, 1999. Arch had net losses of $181.9 million, $206.1 million
and $285.6 million in the years ended December 31, 1997, 1998 and 1999,
respectively, as a result of significant depreciation and amortization expenses
related to acquired and developed assets and interest charges associated with
indebtedness. As its subscriber base has grown, Arch's adjusted earnings before
interest, income taxes, depreciation and amortization have increased from $130.3
million in the year ended December 31, 1997 to $141.6 million in the year ended
December 31, 1998 and to $209.5 million in the year ended December 31, 1999.

     Earnings before interest, income taxes, depreciation and amortization is a
commonly used measure of financial performance in the wireless messaging
industry. Adjusted earnings before interest, income taxes, depreciation and
amortization is also one of the financial measures used to calculate whether
Arch and its subsidiaries are in compliance with the covenants under their
respective debt agreements. Adjusted earnings before interest, income taxes,
depreciation and amortization should not be construed as an alternative to
operating income or cash flows from operating activities as determined in
accordance with generally accepted accounting principles. One of Arch's
financial objectives is to increase its adjusted earnings before interest,
income taxes, depreciation and amortization, since this is a significant source
of funds for servicing indebtedness and for investment in continued growth,
including purchase of messaging units and messaging system equipment,
construction and expansion of messaging systems, and possible

                                       56
<PAGE>   64

acquisitions. Adjusted earnings before interest, income taxes, depreciation and
amortization, as determined by Arch, may not necessarily be comparable to
similarly titled data of other wireless messaging companies. Amounts reflected
as adjusted earnings before interest, income taxes, depreciation and
amortization are not necessarily available for discretionary use as a result of
restrictions imposed by the terms of existing or future indebtedness, including
the repayment of such indebtedness or the payment of associated interest,
limitations imposed by applicable law upon the payment of dividends or
distributions or capital expenditure requirements.

POTENTIAL EFFECTS OF THE PAGENET MERGER

     If Arch acquires PageNet as described in this proxy statement, the combined
company will have substantially larger assets, liabilities, revenues and
expenses. On a pro forma basis at June 30, 2000, the combined company would have
had approximately 14.0 million units in service, total assets of $2.8 billion
and total long term debt of $1.8 billion, assuming that all of the outstanding
discount notes are exchanged for common stock. For the year ended December 31,
1999, the combined company would have had pro forma total revenues of $1.7
billion, adjusted pro forma earnings before interest, income taxes, depreciation
and amortization of $471.0 million, and net loss of $435.0 million. This pro
forma net loss excludes the effects of an extraordinary gain relating to the
extinguishment of debt of $7.0 million and the negative $40.8 million cumulative
effect of an accounting change relating to Arch's and PageNet's original
application of Statement of Position 98-5 "Reporting on the Costs of Start-Up
Activities." For the six months ended June 30, 2000, the combined company would
have had pro forma total revenues of $814.5 million, adjusted pro forma earnings
before interest, income taxes, depreciation and amortization of $215.4 million
and a net loss of $228.6 million. This pro forma net loss excludes the effect of
an extraordinary gain of $52.1 million relating to the extinguishment of Arch
debt. This amount also excludes the impact of expected operational cost
synergies. For the year ended December 31, 1999, the combined company's pro
forma cash flows provided by operating activities, used in investing activities
and provided by financing activities would have been $325.2 million, $894.7
million and $717.7 million, respectively. For the six months ended June 30,
2000, the combined company's pro forma cash flows provided by operating
activities, used in investing activities and provided by financing activities
were $159.4 million, $82.3 million and $27.9 million, respectively. The adjusted
pro forma cash flow information assumes that the merger and related transactions
had been effected as of January 1, 1999. Leverage for the combined company on a
pro forma basis, as measured by the ratio of total debt to annualized adjusted
pro forma earnings before interest, income taxes, depreciation and amortization
for the year ended December 31, 1999, and six months ended June 30, 2000 would
have been 3.8 to 1.0 and 4.3 to 1.0, respectively. This also excludes the impact
of expected operational cost synergies. Adjusted pro forma earnings before
interest, income taxes, depreciation and amortization is earnings before
interest, income taxes, depreciation and amortization, net of restructuring
charges, bankruptcy related expenses, equity in loss of affiliates, income tax
benefit, interest and non-operating expenses (net) and extraordinary items. See
"Unaudited Pro Forma Condensed Consolidated Financial Statements." The PageNet
merger is expected to increase amortization charges by approximately $63.6
million per year.

     The PageNet merger is subject to stockholder, noteholder and lender
consents, bankruptcy court confirmation and many other conditions and,
therefore, it may not take place. If Arch does not acquire PageNet, the
contemplated benefits of the merger will not be realized, despite the incurrence
of substantial costs and capital expenditures related to the transaction, which
are estimated at $30 million for Arch and $20 million for PageNet. If the merger
agreement is terminated after Arch pursues an alternative offer, Arch will be
required to pay to PageNet a termination fee of $40.0 million.

MOBILEMEDIA MERGER

     In June 1999, Arch acquired MobileMedia Communications, Inc., which is now
a wholly owned subsidiary of Arch. MobileMedia had been operating as a
debtor-in-possession under chapter 11 of the Bankruptcy Code.

                                       57
<PAGE>   65

     Arch acquired MobileMedia for a combination of cash and Arch securities, as
follows:

     - Arch paid approximately $479.0 million in cash to secured creditors of
       the MobileMedia;

     - Arch paid a total of $37.6 million of fees, expenses and other debts;

     - Arch issued 4,781,656 shares of its common stock to unsecured creditors
       of MobileMedia;

     - Arch issued 36,207,265 additional shares of its common stock to unsecured
       creditors of MobileMedia and Arch stockholders for a total purchase price
       of $217.2 million; and

     - Arch issued to four unsecured creditors, who had agreed to act as standby
       purchasers and to purchase shares not purchased by other unsecured
       creditors, warrants to acquire 1,225,219 shares of its common stock on or
       before September 1, 2001 for $9.03 per share.

     Arch also issued to the holders of its common stock and Series C preferred
stock on January 27, 1999 non-transferable rights to acquire up to 14,964,388
shares of its common stock at a price of $6.00 per share. A total of 102,964
non-transferable rights were exercised. Because non-transferable rights to
acquire 14,861,424 shares were not exercised, Arch issued in their place
warrants to purchase 14,861,424 shares of its common stock for $9.03 per share.

     Subsidiaries of Arch also borrowed a total of $320.8 million to help fund
the MobileMedia acquisition.

     During the third quarter of 1999, Arch's board of directors approved plans
covering the elimination of redundant headcount and facilities in connection
with the overall integration of operations. It is expected that the integration
will be completed by December 31, 2000. Because Arch anticipates a net reduction
of approximately 10% of MobileMedia's workforce and the closing of some
facilities and tower sites, it established a $14.5 million acquisition reserve
which is included as part of the purchase price of MobileMedia. The initial
acquisition reserve consisted of approximately:

     - $6.1 million for employee severance;

     - $7.9 million for lease obligations and terminations; and

     - $0.5 million of other costs.

     There can be no assurance that the desired cost savings will be achieved or
that the integration of the two companies will be accomplished smoothly,
expeditiously or successfully. See Note 9 to the Notes to Arch's consolidated
financial statements.

                                       58
<PAGE>   66

RESULTS OF OPERATIONS

     The following table presents certain items from Arch's consolidated
statements of operations as a percentage of net revenues and certain other
information for the periods indicated (dollars in thousands except per unit
data):

<TABLE>
<CAPTION>
                                                                                   SIX MONTHS
                                                                                     ENDED
                                               YEAR ENDED DECEMBER 31,              JUNE 30,
                                           --------------------------------   --------------------
                                             1997        1998       1999        1999        2000
                                           ---------   --------   ---------   ---------   --------
<S>                                        <C>         <C>        <C>         <C>         <C>
Total revenues...........................      107.9%     107.8%      105.8%      106.6%     104.8%
Cost of products sold....................       (7.9)      (7.8)       (5.8)       (6.6)      (4.8)
                                           ---------   --------   ---------   ---------   --------
Net revenues.............................      100.0      100.0       100.0       100.0      100.0
Operating expenses:
  Service, rental and maintenance........       21.7       21.1        21.8        22.0       21.3
  Selling................................       14.0       12.8        13.9        14.1       13.7
  General and administrative.............       28.8       29.2        29.8        28.7       30.3
  Depreciation and amortization..........       63.2       57.7        51.0        58.2       50.1
  Restructuring charge...................         --        3.8        (0.4)         --         --
                                           ---------   --------   ---------   ---------   --------
Operating income (loss)..................      (27.7)%    (24.6)%     (16.1)%     (23.0)%    (15.4)%
                                           =========   ========   =========   =========   ========
Net income (loss)........................      (49.5)%    (53.7)%     (47.1)%     (72.7)%    (22.8)%
                                           =========   ========   =========   =========   ========
Cash flows provided by operating
  activities.............................  $  63,590   $ 83,380   $  99,536   $  36,378   $ 53,006
Cash flows used in investing
  activities.............................  $(102,769)  $(82,868)  $(627,166)  $(573,428)  $(77,663)
Cash flows provided by (used in)
  financing activities...................  $  39,010   $ (2,207)  $ 529,158   $ 557,302   $ 25,354
Adjusted earnings before interest, income
  taxes, depreciation and amortization...       35.4%      36.9%       34.5%       35.2%      34.7%
                                           =========   ========   =========   =========   ========
Annual service, rental and maintenance
  expenses per unit in service...........  $      22   $     20   $      23   $      20   $     23
</TABLE>

     Adjusted earnings before interest, income taxes, depreciation and
amortization, as determined by Arch, does not reflect restructuring charge,
equity in loss of affiliate, and extraordinary items; consequently adjusted
earnings before interest, income taxes, depreciation and amortization may not
necessarily be comparable to similarly titled data of other wireless messaging
companies. Earnings before interest, income taxes, depreciation and amortization
is commonly used by analysts and investors as a principal measure of financial
performance in the wireless messaging industry. Adjusted earnings before
interest, income taxes, depreciation and amortization is also one of the primary
financial measures used to calculate whether Arch and its subsidiaries are in
compliance with financial covenants under their debt agreements. These
covenants, among other things, limit the ability of Arch and its subsidiaries
to:

     - incur additional indebtedness;

     - make investments;

     - pay dividends;

     - grant liens on its assets;

     - merge, sell or acquire assets;

     - repurchase or redeem capital stock;

     - incur capital expenditures; and

     - prepay certain indebtedness.

Earnings before interest, income taxes, depreciation and amortization is also
one of the financial measures used by analysts to value Arch. Therefore Arch
management believes that the presentation of earnings before interest, income
taxes, depreciation and amortization provides relevant information to investors.

                                       59
<PAGE>   67

Earnings before interest, income taxes, depreciation and amortization should not
be construed as an alternative to operating income or cash flows from operating
activities as determined in accordance with general accepted accounting
principles or as a measure of liquidity. Amounts reflected as earnings before
interest, income taxes, depreciation and amortization or adjusted earnings
before interest, income taxes, depreciation and amortization are not necessarily
available for discretionary use as a result of restrictions imposed by the terms
of existing indebtedness and limitations imposed by applicable law upon the
payment of dividends or distributions, among other things.

  Six Months Ended June 30, 2000 Compared with Six Months Ended June 30, 1999

     Total revenues increased $143.4 million, or 61.2%, to $377.8 million in the
six months ended June 30, 2000 from $234.4 million in the six months ended June
30, 1999, as the number of units in service increased from 4.3 million at March
31, 1999 to 6.7 million at June 30, 2000 entirely due to the MobileMedia
acquisition in June 1999. Net revenues (total revenues less cost of products
sold) increased to $360.6 million, a 64.0% increase, in the six months ended
June 30, 2000 from $219.9 million for the corresponding 1999 period. Total
revenues and net revenues in 1999 and 2000 were adversely affected by (1) the
declining demand for basic paging services and (2) subscriber cancellations and
changes in the definition of units in service which led to a decrease of 277,000
units in service during the six months ended June 30, 2000.

     Arch expects revenue to continue to be adversely affected in 2000 by
declining demand for basic numeric and alphanumeric paging services. Arch
believes that the basic paging industry did not grow during 1999, that demand
for basic paging services will decline in 2000 and the following years and that
any significant future growth in the industry will be attributable to advanced
messaging services. As a result, Arch believes that it will experience a net
decline in the number of its units in service in 2000, excluding the addition of
subscribers from the pending PageNet acquisition, as Arch's addition of advanced
messaging subscribers is likely to be exceeded by its loss of basic paging
subscribers.

     Service, rental and maintenance revenues, which consist primarily of
recurring revenues associated with the sale or lease of messaging services,
increased to $353.3 million in the six months ended June 30, 2000 from $212.8
million in the six months ended June 30, 1999. This increase was due entirely to
the acquisition of MobileMedia in June 1999. Maintenance revenues represented
less than 10% of total service, rental and maintenance revenues in the six
months ended June 30, 2000 and 1999. Arch does not differentiate between service
and rental revenues.

     Service, rental and maintenance expenses, which consist primarily of
telephone, third party carrier fees and site rental expenses, increased to $77.0
million, 21.3% of net revenues, in the six months ended June 30, 2000 from $48.4
million, 22.0% of net revenues, in the six months ended June 30, 1999. The
increase was due primarily to increased expenses associated with the provision
of wireless messaging services to a greater number of units due to the
MobileMedia acquisition. Annualized service, rental and maintenance expenses per
unit in service increased to $23 in the six months ended June 30, 2000 from $20
in the six months ended June 30, 1999. This increase is due primarily to the
provision of alphanumeric and nationwide messaging services to a higher
percentage of customers due to the MobileMedia acquisition.

     Selling expenses increased to $49.4 million, 13.7% of net revenues, in the
six months ended June 30, 2000 from $31.0 million, 14.1% of net revenues, in the
six months ended June 30, 1999 due primarily to the MobileMedia acquisition.

     General and administrative expenses increased to $109.3 million, 30.3% of
net revenues, in the six months ended June 30, 2000 from $63.0 million, 28.7% of
net revenues, in the six months ended June 30, 1999. The increase was due
primarily to the MobileMedia acquisition.

     Depreciation and amortization expenses increased to $180.6 million in the
six months ended June 30, 2000 from $128.0 million in the six months ended June
30, 1999. The increase in these expenses was principally attributable to
additional depreciation associated with assets purchased in the MobileMedia

                                       60
<PAGE>   68

acquisition and amortization expense associated with intangibles which resulted
from the MobileMedia acquisition. Additionally, depreciation expense for the six
months ended June 30, 1999 included the write-off of approximately $7.1 million
of costs associated with the development of an integrated billing and management
system. Arch decided to discontinue these development efforts due to the
capabilities of the system acquired with the MobileMedia acquisition.

     Operating loss increased to $55.6 million in the six months ended June 30,
2000 from $50.6 million in the six months ended June 30, 1999 as a result of the
factors outlined above.

     Net interest expense increased to $76.7 million in the six months ended
June 30, 2000 from $59.2 million in the six months ended June 30, 1999. The
increase was attributable to an increase in Arch's average outstanding debt due
to the MobileMedia acquisition and to a lesser extent to a one-time charge of
$2.4 million in relation to the convertible debt for equity exchange. Interest
expense in the six months ended June 30, 2000 and 1999 includes approximately
$14.7 million and $20.3 million, respectively, of non-cash interest accretion on
Arch's notes. This reduction was due to the exchange of $276.0 million principal
amount of discount notes for common stock and preferred stock during 2000.

     In the six months ended June 30, 2000, Arch recognized an extraordinary
gain of $52.1 million on the retirement of debt exchanged for common stock.

     On January 1, 1999, Arch adopted the Accounting Standards Executive
Committee of the American Institute of Certified Public Accountants Statement of
Position 98-5 (SOP 98-5). SOP 98-5 requires costs of start-up activities and
organization costs to be expensed as incurred. Initial application of SOP 98-5
resulted in a $3.4 million charge in the quarter ended March 31, 1999 which was
reported as the cumulative effect of a change in accounting principle. This
charge represents the unamortized portion of start-up and organization costs
which had been deferred in prior years.

     Net loss increased to $82.3 million in the six months ended June 30, 2000
from $159.9 million in the six months ended June 30, 1999 as a result of the
factors outlined above.

  Year Ended December 31, 1999 Compared with Year Ended December 31, 1998

     Total revenues increased to $641.8 million, a 55.2% increase, in 1999 from
$413.6 million in 1998 as the number of units in service increased from 4.3
million at December 31, 1998 to 6.9 million at December 31, 1999 entirely due to
the MobileMedia acquisition in June 1999. Net revenues increased to $606.9
million, a 58.2% increase, in 1999 from $383.7 million in 1998. Total revenues
and net revenues in 1999 were adversely affected by (1) the declining demand for
basic paging services and (2) Arch subscriber cancellations which led to a
decrease of 89,000 units in service excluding the addition of subscribers from
the MobileMedia acquisition. Revenues were also adversely affected in the fourth
quarter of 1998 and in 1999 by:

     - Arch's decision, in anticipation of the MobileMedia acquisition, not to
       replace normal attrition among direct sales personnel; and

     - to a lesser extent, the reduced effectiveness of Arch's reseller channels
       of distribution;

     - reduced sales through Arch-operated retail stores; and

     - subscriber cancellations during 1999.

     Arch expects revenue to continue to be adversely affected in 2000 by
declining demand for basic numeric and alphanumeric paging services. Arch
believes that the basic paging industry did not grow during 1999, that demand
for basic paging services will decline in 2000 and the following years and that
any significant future growth in the paging industry will be attributable to
advanced messaging services. See "Industry Overview." As a result, Arch believes
that it will experience a net decline in the number of its units in service in
2000, excluding the addition of subscribers from the PageNet acquisition, as
Arch's addition of advanced messaging subscribers is likely to be exceeded by
its loss of basic paging subscribers.

                                       61
<PAGE>   69

     Service, rental and maintenance revenues increased to $591.4 million, a
59.3% increase, in 1999 from $371.2 million in 1998. These increases in revenues
were due primarily to the net increase in the number of units in service from
4.3 million at December 31, 1998 to 6.9 million at December 31, 1999. This net
increase was entirely due to the acquisition of MobileMedia on June 3, 1999,
offset by a net decrease from other sources of 89,000 units in service.
Maintenance revenues represented less than 10% of total service, rental and
maintenance revenues in 1999 and 1998. Product sales, less cost of products
sold, increased to $15.5 million, a 23.6% increase, in 1999 from $12.5 million
in 1998, respectively, as a result of a the MobileMedia acquisition.

     Service, rental and maintenance expenses increased to $132.4 million, 21.8%
of net revenues, in 1999 from $80.8 million, 21.1% of net revenues, in 1998. The
increase was due primarily to increased expenses associated with the provision
of wireless messaging services to a greater number of units due to the
MobileMedia acquisition. Annualized service, rental and maintenance expenses per
unit increased to $23 in 1999 from $20 in 1998. This increase was due primarily
to the increase in wireless messaging systems and associated expenses as a
result of the MobileMedia merger.

     Selling expenses increased to $84.2 million, 13.9% of net revenues, in 1999
from $49.1 million, 12.8% of net revenues, in 1998. The increase in absolute
dollars was primarily due to increased headcount and the increase as a
percentage of net revenues was primarily due to redundant headcount as a result
of the MobileMedia merger.

     General and administrative expenses increased to $180.7 million, 29.8% of
net revenues, in 1999 from $112.2 million, 29.2% of net revenues, in 1998. The
increase in absolute dollars was due primarily to increased headcount,
administrative and facility costs and the increase as a percentage of net
revenues was primarily due to the redundant headcount, administrative and
facility costs associated with MobileMedia.

     Depreciation and amortization expenses increased to $309.4 million in 1999
from $221.3 million in 1998. The increase in these expenses principally
reflected the acquisition of MobileMedia. Additionally, depreciation expense in
1999 included the write-off of approximately $7.1 million of costs associated
with the development of an integrated billing and management system. Arch
decided to discontinue further development of that system due to the
capabilities of the system acquired through the MobileMedia merger.

     Operating loss was $97.7 million in 1999 compared to $94.4 million in 1998,
as a result of the factors outlined above.

     Net interest expense increased to $143.0 million in 1999 from $102.3
million in 1998. The increase was principally attributable to an increase in
Arch's outstanding debt due to the MobileMedia acquisition. Interest expense for
1999 included approximately $41.6 million of accreted interest on Arch's senior
discount notes, the payment of which is deferred. Interest expense for 1998
included approximately $37.1 million of accretion on these notes.

     Other expense increased to $45.2 million in 1999 from $2.0 million in 1998.
Other expense in 1999 included:

     - a $6.5 million for a write-off of Arch's entire investment in CONXUS
       Communications, Inc., a holder of narrowband PCS licenses. CONXUS filed
       for bankruptcy protection in May 1999.

     - a $35.8 million write-off of Arch's investment in Benbow PCS Ventures,
       Inc., another holder of narrowband PCS licenses. In June 1999, Arch,
       Benbow and Benbow's controlling shareholder agreed to terminate their
       business relationship and wind-up Benbow's business. For additional
       information see "Liquidity and Capital Resources -- Other Commitments and
       Contingencies."

     In October 1999, Arch recognized an extraordinary gain of $7.0 million on
the retirement of debt exchanged for Arch common stock. In June 1998, Arch
recognized an extraordinary charge of $1.7 million representing the write-off of
unamortized deferred financing costs associated with the prepayment of
indebtedness under prior credit facilities.

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<PAGE>   70

     On January 1, 1999, Arch adopted the Accounting Standards Executive
Committee of the American Institute of Certified Public Accountants Statement of
Position 98-5 (SOP 98-5). SOP 98-5 requires costs of start-up activities and
organization costs to be expensed as incurred. Initial application of SOP 98-5
resulted in a $3.4 million charge in the quarter ended March 31, 1999 which was
reported as the cumulative effect of a change in accounting principle. This
charge represents the unamortized portion of start-up and organization costs
which had been deferred in prior years.

     Net loss increased to $285.6 million in 1999 from $206.1 million in 1998,
as a result of the factors outlined above.

  Year Ended December 31, 1998 Compared with Year Ended December 31, 1997

     Total revenues increased to $413.6 million, a 4.2% increase, in 1998, from
$396.8 million in 1997 as the number of units in service increased from 3.9
million at December 31, 1997 to 4.3 million at December 31, 1998. Net revenues
increased to $383.7 million , a 4.4% increase in 1998 from $367.7 million in
1997. Total revenues and net revenues in 1998 were adversely affected by a
general slowing of industry growth, compared to prior years. Revenues were also
adversely affected in the fourth quarter of 1998 by:

     - Arch's decision, in anticipation of the MobileMedia acquisition, not to
       replace normal attrition among direct sales personnel; and

     - to a lesser extent, the reduced effectiveness of Arch's reseller channel
       of distribution; and reduced sales through Arch-operated retail stores.

     Service, rental and maintenance revenues, increased to $371.2 million, a
5.5% increase, in 1998 from $351.9 million in 1997. These increases in revenues
were due primarily to the increase, through internal growth, in the number of
units in service from 3.9 million at December 31, 1997 to 4.3 million at
December 31, 1998. Maintenance revenues represented less than 10% of total
service, rental and maintenance revenues in 1998 and 1997. Product sales, less
cost of products sold, decreased to $12.5 million, a 20.4% decrease, in 1998
from $15.7 million in 1997, respectively, as a result of a decline in the
average revenue per unit sold.

     Service, rental and maintenance expenses, increased to $80.8 million, 21.1%
of net revenues, in 1998 from $79.8 million, 21.7% of net revenues, in 1997. The
increase was due primarily to increased expenses associated with system
expansions and an increase in the number of units in service. Annualized
service, rental and maintenance expenses per subscriber were $20 in 1998
compared to $22 in 1997.

     Selling expenses decreased to $49.1 million, 12.8% of net revenues, in 1998
from $51.5 million, 14.0% of net revenues, in 1997. The decrease was due
primarily to nonrecurring marketing costs incurred in 1997 to promote Arch's new
Arch Paging brand identity and to a lesser degree to a decrease in the number of
net new units in service. Internal growth decreased by 35.1% in 1998 compared to
1997 primarily due to the factors set forth above that adversely affected
revenues.

     General and administrative expenses increased to $112.2 million, 29.2% of
net revenues, in 1998, from $106.0 million, 28.8% of net revenues, in 1997. The
increase was due primarily to administrative and facility costs associated with
supporting more units in service.

     Depreciation and amortization expenses decreased to $221.3 million in 1998
from $232.3 million in 1997. Depreciation and amortization expenses principally
reflect Arch's acquisitions in prior periods accounted for as purchases. They
also reflect investment in units and other system expansion equipment to support
growth.

     Operating losses were $94.4 million in 1998 compared to $102.0 million in
1997, as a result of the factors outlined above.

     Net interest expense increased to $104.2 million in 1998 from $97.2 million
in 1997. The increase was principally attributable to an increase in Arch's
outstanding debt. Interest expense for 1998 included
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<PAGE>   71

approximately $37.0 million of interest which accretes on Arch's senior discount
notes even though the cash payment of the interest is deferred. Interest expense
for 1997 included approximately $33.3 million of accretion on these notes.

     Arch recognized an income tax benefit of $21.2 million in 1997. This
benefit represented the tax benefit of operating losses incurred subsequent to
the acquisitions of USA Mobile and Westlink which were available to offset
deferred tax liabilities arising from those acquisitions. The tax benefit of
these operating losses was fully recognized during 1997. Accordingly, Arch has
established a valuation reserve against its deferred tax assets which reduced
the income tax benefit to zero as of December 31,1998. Arch does not expect to
recover its deferred tax asset in the foreseeable future and will continue to
increase its valuation reserve accordingly. See Note 5 to Arch's Consolidated
Financial Statements.

     In June 1998, Arch recognized an extraordinary charge of $1.7 million
representing the write-off of unamortized deferred financing costs associated
with the prepayment of indebtedness under prior credit facilities.

     Net loss increased to $206.1 million in the year ended December 31, 1998
from $181.9 million in the year ended December 31, 1997, as a result of the
factors outlined above.

LIQUIDITY AND CAPITAL RESOURCES

     Arch's business strategy requires the availability of substantial funds to
finance the expansion of existing operations, to fund capital expenditures for
subscriber equipment and network system equipment, to service debt and to
finance acquisitions. Arch's net cash flows from operating, investing and
financing activities for the periods indicated in the table below are as
follows:

<TABLE>
<CAPTION>
                                                   YEAR ENDED DECEMBER 31,      SIX MONTHS
                                                  --------------------------       ENDED
                                                   1997      1998     1999     JUNE 30, 2000
                                                  -------   ------   -------   -------------
                                                    (DOLLARS IN MILLIONS)
<S>                                               <C>       <C>      <C>       <C>
Net cash provided by operating activities.......  $  63.6   $ 83.4   $  99.5      $ 53.0
Net cash used for investing activities..........  $(102.8)  $(82.9)  $(627.2)     $(77.7)
Net cash provided by (used in) financing
  activities....................................  $  39.0   $ (2.2)  $ 529.2      $ 25.4
</TABLE>

     Investing activities in 1999 included $516.6 million for the acquisition of
MobileMedia. Financing activities in 1999 included $217.2 million from the sale
of common stock to unsecured creditors of MobileMedia and borrowings of $320.8
million in connection with the acquisition of MobileMedia as described above.

  Capital Expenditures and Commitments

     Excluding acquisitions of wireless messaging businesses, Arch's capital
expenditures were $102.8 million in 1997, $113.2 million in 1998, $113.7 million
in 1999 and $77.7 million in the six months ended June 30, 2000. To date, Arch
generally has funded its capital expenditures with net cash provided by
operating activities and the incurrence of debt.

     Arch's 1999 capital expenditures primarily involved the purchase of
wireless messaging units, system and transmission equipment, information systems
and capitalized financing costs.

     Arch estimates the amount of capital that will be required to fund capital
expenditures for 2000 will be approximately $120 million ($227 million on a pro
forma basis if the PageNet merger were consummated on January 1, 2000). Arch
estimates that capital expenditures for 2001-2003 will be approximately $230
million per year. Such expenditures will be used primarily for subscriber
equipment, network infrastructure, information systems and the construction of
certain markets for the nationwide network of narrowband PCS. However, the
actual amount of capital to be required by the combined company will depend on a
number of factors. These include subscriber growth, the type of products and
services demanded by customers, service revenues, the nature and timing of
Arch's strategy to deploy its

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<PAGE>   72

narrowband personal communications services network, and acquisition strategies
and opportunities. Arch believes that it will have sufficient cash available
from operations and credit facilities to fund its capital expenditures for 2000.

  Other Commitments and Contingencies

     Interest payments commence September 15, 2001 on the $172.4 million
principal amount at maturity of Arch's 10 7/8% senior discount notes outstanding
as of June 30, 2000. Unless all of the senior discount notes are tendered in the
exchange offer, Arch expects to service such interest payments out of cash made
available to it by its subsidiaries. Based on the principal amount outstanding
at June 30, 2000 and assuming that no additional notes are tendered, such
interest payments will equal a maximum of $9.4 million on March 15 and September
15 of each year, beginning September 15, 2001, until scheduled maturity on March
15, 2008.

     If the PageNet Merger agreement is terminated after Arch pursues an
alternative offer, Arch may be required to pay a termination fee of $40.0
million.

     Arch acquired a 49.9% equity interest in Benbow PCS Ventures, Inc. in May
1996. Benbow holds exclusive rights to Federal Communications Commission
authorizations in each of the five regions of the United States which enable
Benbow to provide advanced messaging services using radio frequencies called
"narrowband PCS" frequencies. Arch was formerly obligated to advance Benbow
sufficient funds to service debt obligations to the Federal Communications
Commission incurred by Benbow in connection with its acquisition of these five
licenses and to finance construction of a network to operate on the frequencies
authorized by these five licenses unless funds were available to Benbow from
other sources. Arch estimates that this obligation totaled approximately $100
million at March 31, 1999. This obligation was subject to the approval of Arch's
designee on Benbow's board of directors. As of March 31, 1999, Arch had advanced
approximately $23.7 million to Benbow. In June 1999, Arch, Benbow and Benbow's
controlling stockholder agreed that:

     - the stockholders agreement, the management agreement and the employment
       agreement governing the establishment and operation of Benbow will be
       terminated;

     - Benbow will not make any further Federal Communications Commission
       payments and will not pursue construction of a network to operate on the
       frequencies authorized by the five licenses discussed here;

     - Arch will not be obligated to fund Federal Communications Commission
       payments or construction of a network by Benbow; and

     - the closing of the transaction will occur on the earlier of January 23,
       2001 or receipt of Federal Communications Commission approval.

     On December 20, 1999, Benbow filed with the Federal Communications
Commission a proposal for debt forgiveness which, if approved, would result in
(1) surrender by Benbow of its five narrowband PCS licences back to the
government, and (2) forgiveness by the government of the remaining debt owed on
the surrendered licenses and waiver of any applicable default payments. A total
of approximately $35.25 million in principal debt to the government remains
payable by Benbow on the five narrowband PCS licenses. Benbow's debt forgiveness
proposal is pending and Arch can not determine whether the Federal
Communications Commission ultimately will approve it. In its debt-forgiveness
proposal, however, Benbow demonstrated that the proposal meets standards for
debt forgiveness under applicable federal law.

     The June 1999 agreement between Arch, Benbow and Benbow's controlling
shareholder provides, regardless of the outcome of the debt forgiveness
proposal, that (1) Arch will fulfill all of its current financial obligations to
Benbow, (2) Arch is released from any further obligations to provide funding to
Benbow, and (3) Benbow's controlling shareholder will be paid for her Benbow
stock consistent with the preexisting agreement with Arch which requires Arch to
pay the controlling stockholder in Benbow, in installments, an aggregate amount
of $3.5 million if the transaction closes before January 23, 2001 or
                                       65
<PAGE>   73

$3.8 million if the transaction closes on January 23, 2001. In addition to the
five licenses discussed here, Benbow holds conventional paging licenses which
would be transferred to Arch upon Federal Communications Commission approval.

     As a result of these arrangements, Benbow does not have any meaningful
business operations and is unlikely to retain the five licenses discussed here.
The closing of the transaction did not affect the funding obligations of Arch in
connection with Benbow's acquisition of PageCall in June 1998 described below.

     On June 29, 1998, Benbow acquired all of the outstanding stock of PageCall
by issuing to PageCall's former stockholders preferred stock and a 12%
promissory note for $17.2 million. Benbow also agreed to pay one of PageCall's
stockholders $911,000 over five years for consulting services. Arch guaranteed
all obligations of Benbow under the Benbow preferred stock, promissory note and
consulting agreement. Effective April 8, 2000, pursuant to its guarantee, Arch
issued 2.9 million shares of common stock to PageCall's former stockholders in
exchange for their Benbow preferred stock and promissory note.

     In exchange for its issuance of common stock pursuant to its guarantee,
Arch received from Benbow a promissory note and non-voting, non-convertible
preferred stock of Benbow with an annual yield of 14.5% payable upon an
acquisition of Benbow or earlier to the extent that available cash and
applicable law permit. Arch recorded the issuance of $22.8 million of its common
stock in additional paid-in capital and as a charge to operations as a result of
its satisfaction of this obligation in April 2000.

  Sources of Funds

     Arch believes that its capital needs for the foreseeable future will be
funded with borrowings under current and future credit facilities, net cash
provided by operations and, depending on Arch's needs and market conditions,
possible sales of equity or debt securities. For additional information, see
Note 3 to Arch's consolidated financial statements. Arch's ability to borrow in
the future will depend, in part, on its ability to continue to increase its
adjusted earnings before interest, taxes, depreciation and amortization.

     Recent Issuance of Notes

     In June 1999, a subsidiary of Arch issued $147.0 million principal amount
of 13 3/4% senior notes due 2008 in a private placement pursuant to Rule 144A
under the Securities Act of 1933. The notes were sold at 95.091% of the face
amount for net proceeds of $134.6 million.

     Credit Facility

     An Arch subsidiary has a senior credit facility that currently permits it
to borrow up to $577.9 million consisting of (i) a $175.0 million reducing
revolving Tranche A facility, (ii) a $100.0 million Tranche B term loan and
(iii) a $302.9 million Tranche C term loan.

     The Tranche A facility will be reduced on a quarterly basis commencing on
September 30, 2000 and will mature on June 30, 2005. The Tranche B term loan
will be amortized in quarterly installments commencing September 30, 2000, with
an ultimate maturity date of June 30, 2005. The Tranche C term loan began
amortizing in annual installments on December 31, 1999, with an ultimate
maturity date of June 30, 2006.

     On March 23, 2000, the senior credit facility was amended to add a $746.6
million Tranche B-1 term loan to be used to repay obligations under PageNet's
existing credit facility upon completion of the pending PageNet merger. The
Tranche B term loan will be amortized in quarterly installments commencing March
31, 2001, with an ultimate maturity date of June 30, 2006.

     Equity Issued in Exchange for Debt

     In October 1999, Arch issued 809,545 shares of Arch common stock, which had
a weighted average closing price of $4.03 per share as of the dates of the
transactions, and warrants to purchase 540,487 shares of Arch common stock for
$9.03 per share in exchange for $8.9 million principal amount of Arch
convertible debentures. Arch also issued 2,327,120 shares of Arch common stock,
which had a weighted average closing price of $4.01 per share as of the dates of
the transactions, in exchange for $16.3 million accreted value ($19.0 million
maturity value) of its senior discount notes.

                                       66
<PAGE>   74

     In February and March 2000, Arch issued 285,715 shares of its common stock,
which had a closing price of $10.875 per share as of the date of the
transaction, in exchange for $3.5 million principal amount of Arch convertible
debentures. Arch also issued 11,640,321 shares of its common stock, which had a
weighted average closing price of $12.87 per share as of the dates of the
transactions in exchange for $157.4 million accreted value ($176.0 million
maturity value) of its senior discount notes.

     In May 2000, Arch issued 1,000,000 shares of its Series D convertible
preferred stock in exchange for $91.1 million accreted value ($100.0 million
maturity value) of senior discount notes held by various entities affiliated
with Resurgence Asset Management L.L.C. Upon completion of the merger, the
Series D convertible preferred stock will automatically convert into a total of
6,613,180 shares of common stock. The other terms of the Series D preferred
stock are described under "Description of Arch's Equity Securities."

     Following these transactions, on June 30, 2000, Arch had $1.0 million
principal amount of the convertible debentures and $159.6 million accreted value
($172.4 million maturity value) of discount notes outstanding.

INFLATION

     Inflation has not had a material effect on Arch's operations to date.
Systems equipment and operating costs have not increased in price and wireless
messaging units have tended to decline in recent years. This reduction in costs
has generally been reflected in lower prices charged to subscribers who purchase
their wireless messaging units. Arch's general operating expenses, such as
salaries, employee benefits and occupancy costs, are subject to normal
inflationary pressures.

RECENT AND PENDING ACCOUNTING PRONOUNCEMENTS

     In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards (SFAS) No. 133 "Accounting for Derivative
Instruments and Hedging Activities." SFAS No. 133 requires that every derivative
instrument be recorded in the balance sheet as either an asset or liability
measured at its fair value and that changes in the derivative's fair value be
recognized in earnings. Arch intends to adopt this standard effective January 1,
2001. Arch has not yet quantified the impact of adopting SFAS No. 133 on its
financial statements; however, adopting SFAS No. 133 could increase volatility
in earnings and other comprehensive income.

     The Securities and Exchange Commission released Staff Accounting Bulletin
(SAB) No. 101, "Revenue Recognition in Financial Statements", on December 3,
1999. This SAB provides additional guidance on the accounting for revenue
recognition, including both broad conceptual discussions as well as certain
industry-specific guidance. The guidance is effective for the fourth quarter of
fiscal 2000. Arch does not expect SAB 101 to have a material impact on its
results of operations upon adoption.

FACTORS AFFECTING FUTURE OPERATING RESULTS

  Recent declines in Arch's units in service may continue or even accelerate;
  this trend may impair Arch's financial results

     In 1999, Arch experienced a decrease of 89,000 units in service, excluding
the addition of subscribers from the MobileMedia acquisition. For the six months
ended June 30, 2000 Arch experienced a further decrease of 277,000 units in
service due to subscriber cancellations and definitional changes. Arch believes
that the basic paging industry did not grow during 1999, that demand for basic
paging services will decline in 2000 and in the following years and that any
significant future growth in the paging industry will be attributable to
advanced messaging services. As a result, Arch believes that it will experience
a net decline in the number of its units in service during the remainder of
2000, excluding the addition of subscribers from the PageNet acquisition, as
Arch's addition of advanced messaging subscribers is likely to be exceeded by
its loss of traditional paging subscribers. However, the magnitude of the
expected decline cannot be predicted.

                                       67
<PAGE>   75

     Cancellation of units in service can significantly affect the results of
operations of wireless messaging service providers. The sales and marketing
costs associated with attracting new subscribers are substantial compared to the
costs of providing service to existing customers. Because the wireless messaging
business is characterized by high fixed costs, cancellations directly and
adversely affect earnings before interest, income taxes, depreciation and
amortization.

  Competition from large telephone, cellular and PCS companies is intensifying
  and may reduce Arch's revenues and operating margins

     Traditional paging companies like Arch and PageNet, whose units in service
have been declining, increasingly compete for market share against large
telephone, cellular and PCS providers like MCI WorldCom, AT&T, Nextel, BellSouth
Wireless Data and Motient, Inc., formerly known as American Mobile Satellite
Corporation. The combined company will also compete with other paging companies
that continue to offer messaging and advanced messaging services. Some
competitors possess greater financial, technical and other resources than those
available to the combined company. If any of such competitors were to devote
additional resources to their wireless communications business or focus on
Arch's or PageNet's historical business segments, they could secure the combined
company's customers and reduce demand for its products. This could materially
reduce the combined company's revenues and operating margins and have a material
adverse effect on earnings before interest, income taxes, depreciation and
amortization.

  Mobile, cellular and PCS telephone companies have introduced phones and phone
  services with substantially the same features and functions as the advanced
  messaging pagers and services provided by Arch and PageNet, and have priced
  such devices and services competitively. The future growth and profitability
  of Arch and PageNet depends on the success of our advanced messaging services.

     Arch and PageNet's advanced messaging services will compete with other
available mobile wireless services which have already demonstrated high levels
of market acceptance, including cellular, PCS and other mobile phone services,
such as those offered by Nextel, whose hand-held devices can send and receive
messages. Many of these other mobile wireless phone services now include
wireless messaging as an adjunct service or may replace send-and-receive
messaging services entirely. It is less expensive for an end user to enhance a
cellular, PCS or other mobile phone with modest data capability than to use both
a mobile phone and a pager. This is because the nationwide cellular, PCS and
other mobile phone carriers have subsidized the purchase of mobile phones and
because prices for mobile wireless services have been declining rapidly. In
addition, the availability of coverage for these services has increased, making
the two types of services and product offerings more comparable. Thus, companies
other than Arch and PageNet seeking to provide wireless messaging services may
be able to bring their products to market faster or in packages of products that
consumers and businesses find more valuable than those to be provided by Arch
and PageNet. If this occurs, Arch's and PageNet's market share will erode and
financial operations will be impaired.

  Continued net losses are likely and Arch cannot predict whether it will ever
be profitable

     Arch and PageNet have reported net losses in the past. Arch expects that
the combined company will continue to report net losses and cannot give any
assurance about when, if ever, it is likely to attain profitability. Many of the
factors that will determine whether or not Arch attains profitability are
inherently difficult to predict. These include the decreased demand for basic
paging services and the uncertain market for advanced paging services which
compete against services offered by telephone, cellular and PCS providers, new
service developments and technological change, both before and after the merger.

                                       68
<PAGE>   76

  Arch's revenues and operating results may fluctuate, leading to fluctuations
  in trading prices and possible liquidity problems

     Arch believes that future fluctuations in its revenues and operating
results may occur due to many factors, particularly the decreased demand for
basic paging services and the uncertain market for advanced paging services.
Arch's current and planned expenses and debt repayment levels are, to a large
extent, fixed in the short term, and are based in part on its expectations as to
future revenues and cash flow growth. Arch may be unable to adjust spending in a
timely manner to compensate for any revenue or cash flow shortfall. It is
possible that, due to future fluctuations, Arch's revenue, cash flow or
operating results may not meet the expectations of securities analysts or
investors. This may have a material adverse effect on the price of Arch's common
stock. If shortfalls were to cause Arch not to meet the financial covenants
contained in its debt instruments, the debtholders could declare a default and
seek immediate repayment.

  Arch's leverage will still be significant following the merger and may
  continue to burden Arch's operations, impair its ability to obtain additional
  financing, reduce the amount of cash available for operations and make Arch
  more vulnerable to financial downturns than if it had less debt

     Arch expects to remain leveraged to a substantial degree following the
merger, with a ratio of pro forma total debt, total assets to adjusted earnings
before interest, income taxes, depreciation and amortization of 4.3 to 1 as of
June 30, 2000, assuming the exchange of all currently outstanding Arch discount
notes, or 4.6 to 1 assuming no exchange of any currently outstanding Arch
discount notes. Arch's total debt would be $1.8 billion assuming exchange of all
notes and $2.0 billion assuming no further exchange of notes.

     Adjusted earnings before interest, income taxes, depreciation and
amortization is not a measure defined in generally accepted accounting
principles and should not be considered in isolation or as a substitute for
measures of performance prepared in accordance with generally accepted
accounting principles. Adjusted earnings before interest, income taxes,
depreciation and amortization, as determined by PageNet and Arch, may not
necessarily be comparable to similarly titled data of other wireless messaging
companies.

     Leverage may:

     - impair Arch's ability to obtain additional financing necessary for
       acquisitions, working capital, capital expenditures or other purposes on
       acceptable terms, if at all; and

     - require a substantial portion of Arch's cash flow to be used to pay
       interest expense; this will reduce the funds which would otherwise be
       available for operations and future business opportunities.

Arch may not be able to reduce its financial leverage as it intends, and may not
be able to achieve an appropriate balance between growth which it considers
acceptable and future reductions in financial leverage. If Arch is not able to
achieve continued growth in earnings before interest, income taxes, depreciation
and amortization, it may be precluded from incurring additional indebtedness due
to cash flow coverage requirements under existing or future debt instruments.

 Restrictions under Arch's debt instruments may prevent Arch from declaring
 dividends, incurring or repaying debt, making acquisitions, altering its lines
 of business or taking other actions which its management considers beneficial

     Various debt instruments impose operating and financial restrictions on
Arch. Arch's senior credit facility requires various Arch operating subsidiaries
to maintain specified financial ratios, including a maximum leverage ratio, a
minimum interest coverage ratio, a minimum debt service coverage ratio and a
minimum fixed charge coverage ratio. It also limits or restricts, among other
things, Arch's operating subsidiaries' ability to:

     - declare dividends or repurchase stock;

     - incur or pay back indebtedness;
                                       69
<PAGE>   77

     - engage in mergers, consolidations, acquisitions and asset sales; or

     - alter its lines of business or accounting methods, even though these
       actions would otherwise benefit Arch.

     A breach of any of these covenants could result in a default under the
senior credit facility and/or other debt instruments. Upon the occurrence of an
event of default, the creditors could elect to declare all amounts outstanding
to be immediately due and payable, together with accrued and unpaid interest. If
Arch were unable to repay any such amounts, the senior creditors could proceed
against any collateral securing the indebtedness. If the lenders under the
senior credit facility or other debt instruments accelerated the payment of such
indebtedness, there can be no assurance that the assets of Arch would be
sufficient to repay in full such indebtedness and other indebtedness of Arch.

  Arch may need additional capital to expand its business which could be
  difficult to obtain. Failure to obtain additional capital may preclude Arch
  from developing or enhancing its products, taking advantage of future
  opportunities, growing its business or responding to competitive pressures

     Arch's business strategy requires substantial funds to be available to
finance the continued development and future growth and expansion of its
operations, including the development and implementation of advanced messaging
services and possible acquisitions. Arch's future capital requirements will
depend upon factors that include:

     - subscriber growth;

     - the type of wireless messaging devices and services demanded by
       customers;

     - technological developments;

     - marketing and sales expenses;

     - competitive conditions;

     - the scope and timing of Arch's strategy for developing technical
       resources to provide advanced messaging services; and

     - acquisition strategies and opportunities.

Arch cannot be certain that additional equity or debt financing will be
available to Arch when needed on acceptable terms, if at all. If sufficient
financing is unavailable when needed, Arch may be unable to develop or enhance
its products, take advantage of future opportunities, grow its business or
respond to competitive pressures or unanticipated needs.

  Obsolescence in company-owned units may impose additional costs on Arch

     Technological change may adversely affect the value of the units owned by
Arch and PageNet that are leased to their subscribers. If Arch's or PageNet's
current subscribers request more technologically advanced units, including
pagers which can send and receive messages, the combined company could incur
additional inventory costs and capital expenditures if required to replace units
leased to its subscribers within a short period of time. Such additional costs
or capital expenditures could have a material adverse effect on the combined
company's results of operations.

 Because Arch depends on Motorola for pagers and on Glenayre and Motorola for
 other equipment, Arch's operations may be disrupted if it is unable to obtain
 equipment from them in the future

     Arch does not manufacture any of the equipment customers need to take
advantage of its services. It is dependent primarily on Motorola, Inc. to obtain
sufficient pager inventory for new subscribers and replacement needs and on
Glenayre Electronics, Inc. and Motorola for sufficient terminals and
transmitters to meet its expansion and replacement requirements. Significant
delays in obtaining any of this equipment, such as MobileMedia experienced
before its bankruptcy filing, could lead to disruptions in operations and
adverse financial consequences. Motorola has announced its intention to
discontinue manufacturing transmitters during 2000, although it will continue to
maintain and service existing equipment into the

                                       70
<PAGE>   78

future. Arch's purchase agreement with Motorola for pagers expires on March 17,
2001. There can be no assurance that the agreement with Motorola for pagers will
be renewed or, if renewed, that the renewed agreement will be on terms and
conditions as favorable to the combined company as those under the current
agreement.

     Arch relies on third parties to provide satellite transmission for some
aspects of its wireless messaging services. To the extent there are satellite
outages or if satellite coverage is impaired in other ways, Arch may experience
a loss of service until such time as satellite coverage is restored, which could
have a material adverse effect due to customer complaints.

                                       71
<PAGE>   79

    SELECTED HISTORICAL CONSOLIDATED FINANCIAL AND OPERATING DATA -- PAGENET

     The following table sets forth selected historical consolidated financial
and operating data of PageNet as of and for the years ended December 31, 1995,
1996, 1997, 1998, and 1999, for the six months ended June 30, 1999 and 2000, and
as of June 30, 2000. The selected financial and operating data as of December
31, 1995, 1996, 1997, 1998, and 1999 and for each of the five years in the
period ended December 31, 1999, has been derived from PageNet's audited
consolidated financial statements and notes. The selected financial and
operating data for the six months ended June 30, 1999 and 2000, and as of June
30, 2000, has been derived from PageNet's unaudited consolidated financial
statements and notes. The following consolidated financial information should be
read in conjunction with "PageNet Management's Discussion and Analysis of
Financial Condition and Results of Operations" and PageNet's consolidated
financial statements and notes.

     The provision for asset impairment for the six months ended June 30, 1999
and the year ended December 31, 1999 represents a charge for the impairment of
the assets of PageNet's majority-owned Spanish subsidiaries. The provision for
asset impairment for the year ended December 31, 1996 represents a provision to
write off subscriber devices leased by PageNet to customers under an agreement
with a national marketing affiliate. The provision for asset impairment for the
year ended December 31, 1997 represents a provision to write down certain
subscriber devices to their net realizable value. The restructuring charges for
the years ended December 31, 1998 and 1999 represent a charge in 1998 and
adjustment of such charge in 1999, for the abandonment of facilities and
property and related severance costs associated with the reorganization of
PageNet's domestic operations. The extraordinary item for the year ended
December 31, 1997, represents the loss on the early retirement of all $200
million of PageNet's outstanding 11.75% senior subordinated notes in May 1997.
The cumulative effect of a change in accounting principle for the year ended
December 31, 1999 represents the write-off of all remaining unamortized start-up
costs as of January 1, 1999, upon the adoption of AICPA Statement of Position
98-5 "Reporting on the Costs of Start-Up Activities." Effective April 1, 1999,
PageNet changed the depreciable lives for its subscriber devices and a portion
of its network equipment. As a result of these changes, depreciation expense
increased by approximately $78 million during the year ended December 31, 1999.
Further discussion of these items is included in "PageNet Management's
Discussion and Analysis of Financial Condition and Results of Operations" and
PageNet's consolidated financial statements and notes.

     Earnings before interest, income taxes, depreciation and amortization is
commonly used by analysts and investors as a principal measure of financial
performance in the wireless messaging industry. Earnings before interest, income
taxes, depreciation and amortization is also one of the primary financial
measures used to calculate whether PageNet and its subsidiaries are in
compliance with financial covenants under their debt agreements. These
covenants, among other things, limit the ability of PageNet and its subsidiaries
to: incur additional indebtedness, advance funds to some of PageNet's
affiliates, pay dividends, grant liens on its assets, merge, sell or acquire
assets, repurchase or redeem capital stock, incur capital expenditures and
prepay certain indebtedness. Earnings before interest, income taxes,
depreciation and amortization is also one of the financial measures used by
analysts to value PageNet. Therefore, PageNet's management believes that the
presentation of earnings before interest, income taxes, depreciation and
amortization provides relevant information to investors. Adjusted earnings
before interest, income taxes, depreciation and amortization, as determined by
PageNet, does not reflect other non-operating (income) expense, provision for
asset impairment, restructuring charge, extraordinary items, and cumulative
effect of a change in accounting principle; consequently adjusted earnings
before interest, income taxes, depreciation and amortization may not necessarily
be comparable to similarly titled data of other wireless messaging companies.
Earnings before interest, income taxes, depreciation and amortization and
adjusted earnings before interest, income taxes, depreciation and amortization
should not be construed as alternatives to operating income or cash flows from
operating activities as determined in accordance with generally accepted
accounting principles or as a measure of liquidity. Amounts reflected as
earnings before interest, income taxes, depreciation and amortization or
adjusted earnings before interest, income taxes, depreciation and amortization
are not necessarily available for discretionary use as a result of restrictions
imposed by the terms of existing indebtedness and limitations imposed by
applicable law upon the

                                       72
<PAGE>   80

payment of dividends or distributions, among other things. See "PageNet
Management's Discussion and Analysis of Financial Condition and Results of
Operations."

     Adjusted earnings before interest, income taxes, depreciation and
amortization margin is calculated by dividing PageNet adjusted earnings before
interest, income taxes, depreciation and amortization by total revenues less
cost of products sold. Earnings before interest, income taxes, depreciation and
amortization margin is a measure commonly used in the wireless messaging
industry to evaluate a company's earnings before interest, income taxes,
depreciation and amortization relative to total revenues less cost of products
sold as an indicator of the efficiency of a company's operating structure.

<TABLE>
<CAPTION>
                                                                                                 SIX MONTHS ENDED
                                               YEAR ENDED DECEMBER 31,                               JUNE 30,
                            --------------------------------------------------------------    ----------------------
                              1995        1996         1997          1998          1999         1999         2000
                            --------    ---------    ---------    ----------    ----------    ---------    ---------
                                    (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                         <C>         <C>          <C>          <C>           <C>           <C>          <C>
STATEMENT OF OPERATIONS
  DATA:
Services, rent and
  maintenance
  revenues..............    $532,079    $ 685,960    $ 818,461    $  945,524    $  897,348    $ 473,503    $ 396,157
Product sales...........     113,943      136,527      142,515       100,503        92,375       44,622       42,999
                            --------    ---------    ---------    ----------    ----------    ---------    ---------
Total revenues..........     646,022      822,487      960,976     1,046,027       989,723      518,125      439,156
Cost of products sold...     (93,414)    (116,647)    (121,487)      (77,672)      (57,901)     (26,639)     (26,236)
                            --------    ---------    ---------    ----------    ----------    ---------    ---------
                             552,608      705,840      839,489       968,355       931,822      491,486      412,920
Services, rent and
  maintenance
  expenses..............     109,484      146,896      173,058       210,480       267,043      130,672      125,240
Selling expenses........      67,561       82,790      102,995       104,350        97,413       45,992       35,322
General and
  administrative
  expenses..............     174,432      219,317      253,886       320,586       361,386      176,229      159,934
Depreciation and
  amortization
  expense...............     148,997      213,440      289,442       281,259       327,101      195,548      121,825
Provision for asset
  impairment............          --       22,500       12,600            --        17,798       17,798           --
Restructuring charge....          --           --           --        74,000       (23,531)          --           --
                            --------    ---------    ---------    ----------    ----------    ---------    ---------
Total operating
  expenses..............     500,474      684,943      831,981       990,675     1,047,210      566,239      442,321
                            --------    ---------    ---------    ----------    ----------    ---------    ---------
Operating income
  (loss)................      52,134       20,897        7,508       (22,320)     (115,388)     (74,753)     (29,401)
Interest expense........    (102,846)    (128,014)    (151,380)     (143,762)     (150,921)     (73,801)     (93,123)
Interest income.........       6,511        3,679        3,689         2,070         3,902        1,305          938
Other non-operating
  income (expense)......          --         (882)      (1,220)        2,003           851          180          (49)
                            --------    ---------    ---------    ----------    ----------    ---------    ---------
Loss before
  extraordinary item and
  cumulative effect of a
  change in accounting
  principle.............     (44,201)    (104,320)    (141,403)     (162,009)     (261,556)    (147,069)    (121,635)
Extraordinary loss......          --           --      (15,544)           --            --           --           --
Cumulative effect of a
  change in accounting
  principle.............          --           --           --            --       (37,446)     (37,446)          --
                            --------    ---------    ---------    ----------    ----------    ---------    ---------
Net loss................    $(44,201)   $(104,320)   $(156,947)   $ (162,009)   $ (299,002)   $(184,515)   $(121,635)
                            ========    =========    =========    ==========    ==========    =========    =========
Per common share data
  (basic and diluted):
Loss before
  extraordinary item and
  cumulative effect of a
  change in accounting
  principle.............    $  (0.43)   $   (1.02)   $   (1.38)   $    (1.57)   $    (2.52)   $   (1.42)   $   (1.17)
Extraordinary loss......          --           --        (0.15)           --            --           --           --
Cumulative effect of a
  change in accounting
  principle.............          --           --           --            --         (0.36)       (0.36)          --
                            --------    ---------    ---------    ----------    ----------    ---------    ---------
Net loss per share......    $  (0.43)   $   (1.02)   $   (1.53)   $    (1.57)   $    (2.88)   $   (1.78)   $   (1.17)
                            ========    =========    =========    ==========    ==========    =========    =========
</TABLE>

                                       73
<PAGE>   81

<TABLE>
<CAPTION>
                                                                                               SIX MONTHS ENDED
                                             YEAR ENDED DECEMBER 31,                               JUNE 30,
                         ----------------------------------------------------------------   -----------------------
                            1995         1996         1997          1998          1999         1999         2000
                         ----------   ----------   -----------   -----------   ----------   ----------   ----------
                                              (DOLLARS IN THOUSANDS)
<S>                      <C>          <C>          <C>           <C>           <C>          <C>          <C>
OTHER OPERATING DATA:
Capital expenditures...  $  312,289   $  437,388   $   328,365   $   268,183   $  234,926   $  134,814   $    6,727
Cash flows provided by
  operating
  activities...........     160,629      110,382       150,503       248,101       77,866      101,516       42,360
Cash flows used in
  investing
  activities...........    (589,387)    (601,122)     (459,929)     (285,586)    (237,319)    (144,109)      (5,976)
Cash flows provided by
  financing
  activities...........     624,489      296,335       308,573        37,638      188,520       50,859        2,583
Earnings before
  interest, income
  taxes, depreciation
  and amortization.....     201,131      233,455       280,186       260,942      175,118       83,529       92,375
Adjusted earnings
  before interest,
  income taxes,
  depreciation and
  amortization.........     201,131      256,837       309,550       332,939      205,980      138,593       92,424
Adjusted earnings
  before interest,
  income taxes,
  depreciation and
  amortization
  margin...............        36.4%        36.4%         36.9%         34.4%        22.1%        28.2%        22.4%
Units in service at end
  of period............   6,738,000    8,588,000    10,344,000    10,110,000    8,991,000    9,766,000    7,858,000
</TABLE>

     The following table reconciles PageNet's net loss to earnings before
interest, income taxes, depreciation and amortization and adjusted earnings
before interest, income taxes, depreciation and amortization:

<TABLE>
<CAPTION>
                                                                                                SIX MONTHS ENDED
                                               YEAR ENDED DECEMBER 31,                              JUNE 30,
                             ------------------------------------------------------------    ----------------------
                               1995        1996         1997         1998         1999         1999         2000
                             --------    ---------    ---------    ---------    ---------    ---------    ---------
                                                (DOLLARS IN THOUSANDS)
<S>                          <C>         <C>          <C>          <C>          <C>          <C>          <C>
Net loss.................    $(44,201)   $(104,320)   $(156,947)   $(162,009)   $(299,002)   $(184,515)   $(121,635)
Interest expense.........     102,846      128,014      151,380      143,762      150,921       73,801       93,123
Interest income..........      (6,511)      (3,679)      (3,689)      (2,070)      (3,902)      (1,305)        (938)
Depreciation and
  amortization expense...     148,997      213,440      289,442      281,259      327,101      195,548      121,825
                             --------    ---------    ---------    ---------    ---------    ---------    ---------
Earnings before interest,
  income taxes,
  depreciation and
  amortization...........     201,131      233,455      280,186      260,942      175,118       83,529       92,375
Other non-operating
  (income) expense.......          --          882        1,220       (2,003)        (851)        (180)          49
Provision for asset
  impairment.............          --       22,500       12,600           --       17,798       17,798           --
Restructuring charge.....          --           --           --       74,000      (23,531)          --           --
Extraordinary loss.......          --           --       15,544           --           --           --           --
Cumulative effective of a
  change in accounting
  principle..............          --           --           --           --       37,446       37,446           --
                             --------    ---------    ---------    ---------    ---------    ---------    ---------
Adjusted earnings before
  interest, income taxes,
  depreciation and
  amortization...........    $201,131    $ 256,837    $ 309,550    $ 332,939    $ 205,980    $ 138,593    $  92,424
                             ========    =========    =========    =========    =========    =========    =========
</TABLE>

                                       74
<PAGE>   82

<TABLE>
<CAPTION>
                                                                                                               AS OF
                                                    DECEMBER 31,                                              JUNE 30,
                         ------------------------------------------------------------------                  ----------
                            1995          1996          1997          1998          1999                        2000
                         ----------    ----------    ----------    ----------    ----------                  ----------
                                               (DOLLARS IN THOUSANDS)
<S>                      <C>           <C>           <C>           <C>           <C>           <C>           <C>
BALANCE SHEET DATA:
Current assets.......    $  259,096    $   95,550    $  105,214    $  108,961    $  130,930                  $  176,043
Total assets.........     1,228,338     1,439,613     1,597,233     1,581,244     1,422,560                   1,351,219
Long-term obligations
  in default.........            --            --            --            --     1,945,000                   1,946,450
Long-term
  obligations, less
  current
  maturities.........     1,150,000     1,459,188     1,779,491     1,815,137        58,127                      59,507
Total shareowners'
  deficit............       (80,784)     (182,175)     (337,931)     (490,419)     (789,839)                   (910,022)
</TABLE>

                                       75
<PAGE>   83

           PAGENET MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                      CONDITION AND RESULTS OF OPERATIONS

INTRODUCTION

     PageNet is a provider of wireless messaging services throughout the United
States and in the U.S. Virgin Islands, Puerto Rico, and Canada. PageNet provides
services in all 50 states and the District of Columbia, including the 100 most
populated markets in the United States. PageNet also owns a minority interest in
a wireless messaging company in Brazil. During 1999 and 2000, several
significant events have occurred:

     - On November 8, 1999, PageNet announced a merger with Arch. Under the
       merger, PageNet will become a wholly owned subsidiary of Arch. Also as
       part of the merger, 80.5% of PageNet's advanced wireless data and
       wireless solutions business will be distributed to PageNet's noteholders
       and stockholders. See "Merger Agreement."

     - PageNet's deteriorating financial results and defaults under its debt
       agreements have resulted in significant liquidity constraints. The report
       of PageNet's independent auditors for the year ended December 31, 1999
       expresses substantial doubt about its ability to continue as a going
       concern. See "Liquidity and Capital Resources."

     - In February, April and August 2000, PageNet failed to make the
       semi-annual interest payments due under its $1.2 billion of senior
       subordinated notes. PageNet is also not in compliance with several
       financial covenants of its domestic revolving credit facility. See
       "Liquidity and Capital Resources."

     - On July 24, 2000, PageNet commenced a bankruptcy proceeding under chapter
       11 of the United States Bankruptcy Code. See "Bankruptcy Filing."

     - As a result of billing software and system implementation problems
       encountered throughout 1999 and the proposed merger with Arch, PageNet
       initially postponed and subsequently suspended the conversions of certain
       local offices to its new billing and customer service systems. As a
       result of these suspensions, in the fourth quarter of 1999 PageNet
       reversed $24 million of a restructuring charge that it had recorded in
       1998. See "Restructuring."

     - Units in service with subscribers decreased from approximately 10.1
       million units at December 31, 1998, to approximately 9.0 million units at
       December 31, 1999. Units in service were approximately 8.4 million units
       at March 31, 2000 and 7.9 million units at June 30, 2000, reflecting
       declines of approximately 567,000 units in the first quarter of 2000 and
       approximately 566,000 units in the second quarter of 2000. Units in
       service are expected to continue to decline in the second half of 2000.

     - In June 1999, PageNet consolidated its initiative to develop advanced
       messaging services including wireless data and wireless solutions into
       its wholly owned subsidiary, Vast. Vast is a development stage company
       and, since its inception, has been engaged primarily in product research
       and development and developing markets for its products and services.
       Vast had total revenues of $1 million and $3 million, respectively, for
       the year ended December 31, 1999 and six months ended June 30, 2000. Vast
       incurred operating losses of approximately $36 million and $11 million,
       respectively, for the year ended December 31, 1999 and six months ended
       June 30, 2000, as a result of these startup activities.

     - PageNet's Spanish subsidiaries ceased operations during the third quarter
       of 1999. PageNet had recorded a provision of $18 million during the first
       quarter of 1999 for the impairment of the assets of the Spanish
       subsidiaries.

     - PageNet incurred net losses of $299 million for the year ended December
       31, 1999 and $122 million for the six months ended June 30, 2000. The net
       loss for 1999 includes an increase in depreciation expense of $78 million
       resulting from changes in the depreciable lives of subscriber
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devices and network equipment and a charge of $37 million for the cumulative
effect of adopting a new accounting standard. See "Results of Operations."

     - On July 26, 2000, PageNet's common stock was delisted from the Nasdaq
       Small Cap Market. On July 27, 2000, PageNet's common stock began to be
       traded in the over-the-counter market.

MERGER AGREEMENT

     On November 7, 1999, PageNet signed a definitive agreement to merge with
Arch. The merger agreement was subsequently amended on January 7, 2000, May 10,
2000, and July 24, 2000. Under terms of the merger agreement, as amended,
PageNet's senior subordinated notes, along with all accrued interest thereon,
will be exchanged for common stock of Arch representing 46.1% of the common
stock of the combined company and PageNet's common stock will be converted into
common stock representing 5.0% of the common stock of the combined company. The
merger agreement also provides for PageNet to distribute 80.5% of its interest
in Vast to holders of PageNet's senior subordinated notes and common stock.
Holders of the senior subordinated notes will receive common stock of Vast
representing 60.5% of the equity of Vast, while holders of PageNet's common
stock will receive common stock of Vast representing 20% of the equity of Vast.
The remaining interest in Vast will be held by the combined company following
the merger.

     As more fully discussed below, PageNet will seek to complete the merger
through the reorganization resulting from PageNet's bankruptcy filing in July
2000. Consummation of the merger is subject to customary regulatory review. Arch
and PageNet have received approval from the Department of Justice and the
Federal Communications Commission to proceed with the merger.

     On July 19, 2000, Metrocall announced that it had offered to acquire
PageNet for a combination of cash and stock. On July 24, 2000, PageNet announced
that its board of directors had concluded that the proposal received from
Metrocall was not a "superior proposal" to the Arch transaction within the
meaning of the merger agreement. PageNet also announced that its board would not
discuss the proposal further with Metrocall.

BANKRUPTCY FILING

     On July 14, 2000, three senior subordinated noteholders commenced an
involuntary proceeding against PageNet under chapter 11 of the United States
Bankruptcy Code. The petition related solely to Paging Network, Inc. and not to
any of its subsidiaries. On July 24, 2000, Paging Network, Inc. consented to an
order for relief which, in effect, converted the involuntary chapter 11 petition
into a voluntary proceeding. On the same date, Paging Network, Inc.'s domestic
subsidiaries other than Vast filed voluntary chapter 11 petitions in the United
States Bankruptcy Court. Subsequent to the petition date, PageNet and its
domestic subsidiaries other than Vast are operating as debtors-in-possession and
are subject to the jurisdiction of the United States Bankruptcy Court for the
District of Delaware. Chapter 11 is the principal business reorganization
chapter of the United States Bankruptcy Code. Under chapter 11 of the bankruptcy
code, a debtor is authorized to reorganize its business for the benefit of its
creditors and stockholders.

     The bankruptcy court has exercised supervisory powers over the operations
of PageNet with respect to the employment of attorneys, investment bankers and
other professionals, and transactions out of the ordinary course of business or
otherwise requiring bankruptcy court approval under the bankruptcy code. PageNet
has been paying undisputed obligations that have arisen subsequent to the
petition date on a timely basis. Since the petition date, the bankruptcy court
has entered orders, among other things, allowing PageNet (1) to pay certain
customer refunds and deposits in the ordinary course of business, (2) to pay
wages, salaries and benefits owing to employees, and (3) to pay pre-petition
obligations owed to continuing vendors as such obligations come due.

     On July 25, 2000, PageNet filed a joint plan of reorganization and
disclosure statement which provide for the implementation of the merger as
PageNet's plan of reorganization. A hearing with respect to the

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bankruptcy court's approval of the disclosure statement is scheduled for
September 7, 2000, at which time the bankruptcy court will determine if the
joint plan of reorganization providing for the implementation of the merger will
be submitted to PageNet's creditors and stockholders for approval. PageNet's
motion to assume the merger termination fee and certain related provisions of
the merger agreement was approved by the bankruptcy court on August 22, 2000. On
August 4, 2000, Metrocall filed a motion requesting that the bankruptcy court
terminate PageNet's exclusivity period and permit Metrocall to submit a
competing plan of reorganization in PageNet's chapter 11 reorganization. A
continued hearing on that motion is scheduled for September 7, 2000. On August
22, 2000, the bankruptcy court also granted Metrocall the right to conduct a
limited due diligence investigation of PageNet through September 1, 2000.

LIQUIDITY AND CAPITAL RESOURCES

  General

     PageNet's deteriorating financial results and liquidity caused PageNet to
be in default of the covenants of all of its domestic debt agreements. On
February 2, 2000 and August 1, 2000, PageNet failed to make the semi-annual
interest payment on its 8.875% senior subordinated notes due 2006, and its
10.125% senior subordinated notes due 2007. As of March 2, 2000, the non-payment
of interest constituted a default under the indentures of these notes. As of
April 17, 2000, PageNet failed to make the semi-annual interest payment on its
10% senior subordinated notes due 2008, and does not expect to make additional
cash interest payments on any of its senior subordinated notes. PageNet also
defaulted on several of the financial and other covenants of its credit
agreement. As a result of these defaults, PageNet's bondholders and the lenders
under its credit agreement had the right to demand at any time that PageNet
immediately pay its outstanding indebtedness in full. On July 14, 2000, three
senior subordinated noteholders commenced the involuntary bankruptcy proceeding
against PageNet discussed above.

     PageNet is prohibited from additional borrowings under its credit agreement
and has classified all of its outstanding indebtedness under its credit
agreement and the senior subordinated notes as a current liability as of
December 31, 1999 and June 30, 2000. On July 24, 2000, PageNet entered into a
debtor-in-possession loan facility with the lenders under its credit agreement.
The debtor-in-possession loan facility provides for additional secured
borrowings by both PageNet and Vast not to exceed $50 million in the aggregate,
subject to certain limitations as set forth in the loan agreement. Borrowings
under the debtor-in-possession loan facility bear interest at prime plus 2.5%
for outstanding borrowings up to $15 million, and at prime plus 3.0% for
outstanding borrowings in excess of $15 million, due monthly. All amounts
outstanding under the debtor-in-possession loan facility are due the earlier of
(1) the confirmation of PageNet's plan of reorganization, or (2) November 30,
2000. As of July 31, 2000, PageNet had approximately $66 million in cash.
PageNet believes that its existing cash, the cash expected to be generated from
operations, and the cash available under the debtor-in-possession loan facility
is sufficient to meet its obligations, except for the cash interest payments due
under the senior subordinated notes, through the completion of the merger.
However, if PageNet's financial results continue to deteriorate, the merger is
delayed, or other unforeseen events occur, PageNet may not be able to complete
the merger. If the merger is not completed, PageNet would likely be required to
consider a stand-alone restructuring, asset sales, transactions with other
potential merger parties or acquirers, or liquidation.

  Effects of the Merger

     PageNet believes that the combined company should not experience the
liquidity problems currently faced by PageNet. As part of the merger, all of the
PageNet senior subordinated notes will be converted into Arch common stock,
eliminating the accrued or future interest payments associated with this
indebtedness. The combined company will have access to Arch's amended credit
facility as a source of additional liquidity. PageNet also anticipates that the
integration of management and information functions will result in lower
operating expenses, although such reductions will require 12 to 18 months to
achieve.

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     PageNet also anticipates that the combined company will have access to
sufficient funding to more broadly introduce advanced messaging services that it
expects to be in greater demand and that it expects to be more competitive with
alternative wireless messaging services.

  Vast Solutions

     Since the inception of Vast, PageNet has funded substantially all of its
operations, which are in the development stage. However, as a result of the
above described defaults, PageNet was prohibited from providing any additional
funding to Vast. Under the debtor-in-possession financing discussed above,
however, Vast will have access to additional borrowings during PageNet's
bankruptcy proceedings. Furthermore, Arch has also committed to provide,
following the close of the PageNet bankruptcy proceeding, a loan of $7.5 million
to Vast. Of PageNet's cash on hand at July 31, 2000, approximately $4 million
was held by Vast. Vast believes cash on hand, together with the amount of cash
available under the debtor-in-possession financing, is sufficient to meet its
obligations through the date at which PageNet expects to complete the merger or
otherwise restructure its obligations. However, there can be no assurance that
these efforts will provide Vast with adequate liquidity to meet its obligations
through the completion of the merger. As a result, Vast may be required to
reduce or cease its current level of development stage operations. Such events
would have a material impact on PageNet's ability to consummate the merger.

  Cash Provided by Operating Activities

     Net cash provided by operating activities was $151 million, $248 million,
and $78 million, respectively, for the years ended December 31, 1997, 1998, and
1999, and $42 million for the six months ended June 30, 2000, compared to $102
for the six months ended June 30, 1999. The decrease in cash provided by
operating activities of $60 million for the six months ended June 30, 2000 as
compared to the same period in 1999 resulted primarily from the continuing
decline in revenues associated with the decline in units in service, a decrease
in accounts payable, and an increase in accounts receivable. The decrease in
accounts payable during the first six months of 2000 was primarily due to lower
levels of capital expenditures and reduced purchases of paging devices. The
increase in accounts receivable during the first six months of 2000 was the
result of reduced cash collections during this period caused by issues
associated with PageNet's new billing and customer service systems, employee
turnover, and PageNet's proposed merger with Arch, all of which have required a
significant portion of PageNet's resources. PageNet increased its collections
efforts during the latter part of the first quarter of 2000 and expects to
realize the benefits of these efforts in future quarters. The decrease in cash
provided from operating activities of $170 million from 1998 to 1999 was
primarily attributable to a continuing decline in revenues associated with the
decline of units in service and duplicative costs which were incurred as
centralized service centers were operating in advance of field offices being
closed. In addition, PageNet expanded its use of temporary personnel due to
turnover in employees and used outside consultants to a greater extent than in
the previous years. Furthermore, accounts receivable increased over 1998 as a
result of a reduced level of collection efforts, and accounts payable decreased
due to lower levels of capital expenditures and reduced purchases of paging
devices. The increase of $97 million from 1997 to 1998 resulted primarily from a
decrease in net loss before non-cash charges, an increase in accounts payable,
and a decrease in inventories. The increase in accounts payable in 1998 was due
to the high level of accounts payable at December 31, 1998, resulting from
additional expenses incurred late in the fourth quarter of 1998 related to the
restructuring of PageNet's operations. The decrease in inventories during 1998
was the result of programs PageNet began instituting in 1997 to utilize
subscriber devices more effectively and to more closely control subscriber
device purchases.

  Cash Provided by Financing Activities

     Net cash provided by financing activities was $309 million, $38 million,
and $189 million, respectively, for the years ended December 31, 1997, 1998, and
1999, and $51 million and $3 million, respectively, for the six months ended
June 30, 1999 and 2000. The primary source of financing for each period except
for

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the first six months of 2000 was net borrowings under PageNet's domestic
revolving credit agreement, which increased by $519 million, $30 million, and
$187 million, respectively, for the years ended December 31, 1997, 1998, and
1999, and $52 million for the three months ended March 31, 1999. As discussed
below, PageNet does not anticipate being able to make additional borrowings
under the credit agreement in the future. As of June 30, 2000, PageNet had
approximately $747 million of borrowings under its credit agreement. As of April
11, 2000, PageNet agreed to reduce its maximum borrowings under the credit
agreement to approximately $747 million. During the year ended December 31,
1997, PageNet redeemed all its outstanding 11.75% senior subordinated notes
utilizing funds borrowed under the credit agreement. As a result, PageNet
recorded an extraordinary loss on the early retirement of debt of approximately
$16 million during the year ended December 31, 1997. Net cash provided by
financing activities has been used for capital expenditures, working capital,
and other general corporate purposes, which included expansion of its existing
business and acquisition of new paging frequencies.

  Cash Used in Investing Activities

     PageNet's operations and expansion into new markets and product lines have
required substantial capital investment. Furthermore, PageNet has been building
an advanced messaging network, which will enable it to offer new advanced
messaging services, and has converted certain back office functions from
decentralized field offices into centralized processing facilities. PageNet
substantially completed building its advanced messaging network in early 2000.
PageNet continued to convert certain back office functions from its
decentralized field offices into the centralized processing facilities through
January 2000, at which time PageNet suspended further conversions. Cash used in
investing activities was $460 million, $286 million, and $237 million,
respectively, for the years ended December 31, 1997, 1998, and 1999, and $144
million and $6 million, respectively, for the six months ended June 30, 1999 and
2000. Capital expenditures, excluding payments for spectrum licenses, were $328
million, $268 million, and $235 million, respectively, for the years ended
December 31, 1997, 1998, and 1999, and $135 million and $7 million,
respectively, for the six months ended June 30, 1999 and 2000, and consisted
primarily of expenditures for PageNet's traditional paging operations, PageNet's
advanced messaging operations, and its restructuring. Payments for spectrum
licenses were $93 million, $13 million, and $4 million, respectively, for the
years ended December 31, 1997, 1998, and 1999, and $3 million for the six months
ended June 30, 1999, and consisted primarily of expenditures for the acquisition
of exclusive rights to certain specialized mobile radio frequency licenses from
incumbent operators.

     Capital expenditures related to PageNet's traditional paging operations,
excluding capital expenditures related to the restructuring, were $224 million,
$136 million, and $84 million, respectively, for the years ended December 31,
1997, 1998, and 1999, $55 million for the six months ended June 30, 1999 and
were minimal for the six months ended June 30, 2000. The decreases in
traditional paging capital expenditures have been primarily due to a reduction
in PageNet's network-related expenditures pertaining to geographic coverage and
capacity expansion. Also, during 1997 PageNet began instituting programs to
utilize subscriber devices more effectively and to more closely control
subscriber device capital expenditures. In addition to the programs to utilize
subscriber devices more effectively, the decrease in traditional paging capital
expenditures in 1997 was also due to increased efficiencies in infrastructure
deployment.

     Capital expenditures related to advanced messaging operations were $104
million, $75 million, and $113 million, respectively, for the years ended
December 31, 1997, 1998, and 1999, and $63 million and $4 million, respectively,
for the six months ended June 30, 1999 and 2000. PageNet launched its send-and-
receive messaging services on its advanced messaging network on February 1,
2000. PageNet expects to spend an additional $15 million in capital expenditures
to complete the buildout of sites started in the fourth quarter of 1999 and
expand capacity in certain cities throughout the nation during 2000. This will
substantially complete PageNet's investment in its advanced messaging network.

     Capital expenditures related to establishing PageNet's centralized
processing facilities, including new system implementations, were $57 million
and $38 million, respectively, for the years ended December 31, 1998 and 1999,
and $17 million and $3 million, respectively, for the six months ended June 30,
1999 and 2000. In January 2000, PageNet suspended further capital expenditures
for its centralized processing
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facilities, pending the decision as to which operating platforms will be used by
the combined company. During May 2000, a decision was made to use Arch's
existing billing and customer service systems upon completion of the merger.
PageNet believes that Arch's billing and customer service systems have the
capacity to handle all of the customers of the combined company. Arch has
significant experience consolidating multiple billing and customer service
systems as a result of prior acquisitions, including its recent acquisition of
MobileMedia. The decisions regarding other systems to be utilized by the
combined company are still pending.

     The amount of capital expenditures may fluctuate from quarter to quarter
and on an annual basis due to several factors, including the variability of
units in service with subscribers. With the substantial completion of the
buildout of its advanced messaging network and the suspension of the
restructuring initiatives beyond January 2000, PageNet expects its capital
expenditures in 2000 to decrease to between $50 million and $65 million. PageNet
expects to fund these capital expenditures through cash on hand, additional cash
generated from operations prior to its contemplated merger with Arch, and the
debtor-in-possession financing described above.

     In 1994, PageNet acquired three nationwide narrowband PCS frequencies in a
Federal Communications Commission auction for $197 million. During April 1996,
PageNet concluded its participation in a Federal Communications Commission
auction of specialized mobile radio frequency licenses, and ultimately acquired
rights to two to four blocks of two-way spectrum in markets across the United
States. During the remainder of 1996 and through 1999, PageNet purchased the
exclusive rights to certain of these specialized mobile radio frequencies from
incumbent operators. The total cost of PageNet's investment in its nationwide
specialized mobile radio frequencies was $221 million. PageNet has employed the
nationwide PCS and specialized mobile radio frequencies for its advanced
messaging network.

Credit Agreement

     PageNet's ability to borrow under its domestic credit agreement effectively
terminated when the chapter 11 case was filed. As of the commencement of the
chapter 11 case, there were approximately $747 million of outstanding borrowings
under the credit agreement. Under the credit agreement, PageNet was permitted to
designate all or a portion of outstanding borrowings to be either a base rate
loan or a loan based on the London interbank offered rate. As of June 30, 2000,
PageNet had designated $745 million of borrowings as London interbank offered
rate loans, which bear interest at a rate equal to London interbank offered rate
plus a spread of 2.00% and $1 million of borrowings as a base rate loan. The
interest rates for the $745 million of London interbank offered rate loans as of
June 30, 2000 ranged from 8.43% to 8.67%. As a result of the defaults described
in Note 2 to the consolidated financial statements, PageNet's lenders have the
right to collect default interest up to 12.00% for PageNet's outstanding
balances under its credit agreement. PageNet has negotiated certain relief from
this default interest rate as part of its efforts associated with the merger
which relief is reflected in the lenders' treatment under the bankruptcy plan.
Amounts owing under the credit agreement are secured by a security interest in
substantially all of PageNet's assets, the assets of PageNet's subsidiaries, and
the capital stock of the subsidiaries of PageNet, other than the international
subsidiaries and Vast.

     The two credit agreements of PageNet's Canadian subsidiaries provide for
total borrowings of approximately $75 million. Because the Canadian subsidiaries
are not debtors in the chapter 11 case, their credit facility is not impacted by
the chapter 11 case. The lenders are Toronto Dominion Bank, Canadian Imperial
Bank of Commerce and National Bank of Canada. Amounts available under the two
credit agreements begin reducing in the first quarter of 2002 and reduce to zero
on December 31, 2004. Borrowings of up to approximately $40 million require
security in the form of cash or government securities. Borrowings of up to
approximately $35 million require a first security in the assets of the Canadian
subsidiaries. Furthermore, PageNet is required to provide an additional $2
million of cash collateral by December 31, 2000. However, as a result of the
commencement of the chapter 11 case and the above described defaults, PageNet is
precluded from providing any additional funding on behalf of its Canadian
subsidiaries without approval from U.S. lenders and the bankruptcy court. The
ability of PageNet's Canadian subsidiaries to continue as a going concern is
dependent on meeting the terms of their
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credit agreements, either by providing the additional cash collateral or by
establishing alternative arrangements satisfactory to the lenders. PageNet and
its Canadian subsidiaries have taken and plan to take actions that management
believes will mitigate any adverse conditions and events resulting from the
possible failure of PageNet to provide the required cash collateral on December
31, 2000. However, there is no certainty that these actions or other strategies
will be sufficient to allow PageNet's Canadian subsidiaries to meet the terms of
their credit agreements.

     As of June 30, 2000, approximately $59 million of borrowings were
outstanding under the Canadian credit facilities. Additional borrowings are
available to PageNet's Canadian subsidiaries under these facilities, so long as
the borrowings are either collateralized or the financial covenants in the
credit agreements are met. The interest rate for borrowings secured by cash or
government securities is the bankers' acceptance rate for bankers' acceptances
reported by Toronto Dominion Bank plus 0.5%. The interest rate for borrowings
secured by the assets of the Canadian subsidiaries is the bankers' acceptance
rate for bankers' acceptances reported by Toronto Dominion Bank plus 1%, 2%, 3%,
or 4%, depending on the current debt ratio of the Canadian subsidiaries. The
current bankers' acceptance rate for bankers' acceptances reported by Toronto
Dominion Bank is 5.2% and the current spread required for borrowings secured by
the assets of the Canadian subsidiaries is 4.0%.

RESTRUCTURING

     In February 1998, PageNet's board of directors approved PageNet's
restructuring. PageNet's restructuring plan called for the elimination of
redundant administrative operations by consolidating key support functions
located in offices throughout the country into centralized processing
facilities. In addition, the restructuring plan called for the conversion to new
billing and customer service software platforms. The restructuring plan
specified local and regional office closures, the disposition of certain
furniture, fixtures, and equipment and the termination of approximately 1,950
employees by job function and location. Having adopted a formal plan of
restructuring, PageNet recorded a restructuring charge of $74 million during the
quarter ended March 31, 1998. While progress in establishing the centralized
processing facilities was made, PageNet's efforts to convert its offices to its
new billing and customer service software platforms fell behind the original
schedule of being completed during the second quarter of 1999. Billing software
and system implementation problems surfaced during the first office conversions,
and as a result, PageNet had to postpone the conversion of many of its other
offices. These postponements resulted in delays in office closures which
deferred the payments of amounts accrued for lease obligations and terminations
and severance and related benefits. Additional implementation problems surfaced
during 1999 and caused further delays. In November 1999, and in conjunction with
the announcement of PageNet's planned merger with Arch, PageNet decided to
suspend further conversions after January 2000 pending the decisions as to which
operating platforms will be used by the combined company. During May 2000, a
decision was made to use Arch's existing billing and customer service systems
upon completion of the merger. The decisions regarding other systems to be
utilized by the combined company are still pending. As a result of the decision
to suspend the restructuring indefinitely, PageNet recorded a reversal of the
unused portion of the original restructuring charge of $24 million during the
quarter ended December 31, 1999.

     PageNet has converted to its new billing and customer service software
platforms all of its customer units placed in service by its resellers and
approximately 50% of its direct customer units. As a result, PageNet will
realize a portion of the anticipated cost savings resulting from its
restructuring initiative and will eliminate some of the duplicative costs that
have adversely affected its results of operations. However, due to the
suspension of future conversions, combined with the impact of the contemplated
merger on its operations, PageNet is unable to determine the amount of future
cost savings resulting from the centralized processing facilities initiative.

RESULTS OF OPERATIONS

     The following discussion and analysis should be read in conjunction with
PageNet's consolidated financial statements and notes. Earnings before interest,
income taxes, depreciation and amortization is a
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commonly used measure of financial performance in the wireless messaging
industry and is one of the financial measures used to calculate whether PageNet
is in compliance with the financial covenants under its debt agreements.
Adjusted earnings before interest, income taxes, depreciation and amortization
is defined as earnings before interest, income taxes, depreciation,
amortization, other non-operating income (expense), provision for asset
impairment, restructuring charge, extraordinary items, and cumulative effect of
a change in accounting principle. Adjusted earnings before interest, income
taxes, depreciation and amortization should not be considered an alternative to
operating income or cash flows from operating activities as determined in
accordance with generally accepted accounting principles. One of PageNet's
financial objectives is to increase its adjusted earnings before interest,
income taxes, depreciation and amortization, since adjusted earnings before
interest, income taxes, depreciation and amortization is a significant source of
funds for servicing indebtedness and for investment in continued growth,
including purchase of paging units and paging system equipment and the
construction and expansion of paging systems. Adjusted earnings before interest,
income taxes, depreciation and amortization, as determined by PageNet, may not
be comparable to similarly titled data of other wireless messaging companies.
Amounts described as adjusted earnings before interest, income taxes,
depreciation and amortization are not necessarily available for discretionary
use as a result of restrictions imposed by the terms of existing or future
indebtedness, including the repayment of such indebtedness or the payment of
associated interest, limitations imposed by law upon the payment of dividends or
distributions or capital expenditure requirements.

SIX MONTHS ENDED JUNE 30, 2000 COMPARED WITH SIX MONTHS ENDED JUNE 30, 1999

  Services, Rent and Maintenance Revenues

     Revenues from services, rent and maintenance, which PageNet considers its
primary business, decreased 16.3% to $396 million for the six months ended June
30, 2000, compared to $474 million for the six months ended June 30, 1999. The
average revenue per unit for PageNet's traditional paging domestic operations
decreased to $7.70 for the six months ended June 30, 2000, compared to $7.94 for
the corresponding period of 1999. The decrease in revenues from services, rent
and maintenance was primarily due to the 19.5% reduction in number of units in
service from June 30, 1999 to June 30, 2000.

     The number of units in service with subscribers at June 30, 2000 was
7,858,000, compared to 8,991,000 and 9,766,000 units in service with subscribers
at December 31, 1999 and June 30, 1999, respectively. This reduction was mainly
due to customer cancellations as a result of certain price increases,
intensifying price competition in the market for wireless messaging services,
disruptions in customer service caused by conversions to new centralized
processing facilities systems and infrastructure, and the degree to which
cellular, personal communications services, and other mobile telephone services
are being subscribed to instead of traditional messaging services such as those
offered by PageNet. Many of the factors that reduced PageNet's units in service
in the first six months of 2000 have continued to exist in the third quarter of
2000. As a result, PageNet expects units in service to continue to decline
throughout 2000.

  Product Sales

     Product sales decreased 3.6% to $43 million for the six months ended June
30, 2000, compared to $45 million for the same period in 1999.

  Services, Rent and Maintenance Expenses

     Services, rent and maintenance expenses decreased 4.2% to $125 million for
the six months ended June 30, 2000, compared to $131 million for the six months
ended June 30, 1999. The decrease in services, rent and maintenance expenses was
primarily attributable to a decrease in pager parts, repairs and scrap expense
of approximately $6 million for the six months ended June 30, 2000, mainly due
to increased use of in-house repair facilities, a more selective approach in the
decision to repair units, and increased sales of "as is" units.

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  Selling Expenses

     Selling expenses decreased 23.2% to $35 million for the six months ended
June 30, 2000 compared to $46 million for the same period in 1999. The decrease
in selling expenses for the first half of 2000 was primarily due to:

     - decreased marketing research, development costs, and advertising expenses
       of approximately $7 million for the six months ended June 30, 2000,
       associated with PageNet's traditional paging and advanced messaging
       operations. Marketing research, development costs and advertising
       expenses associated with PageNet's traditional paging and advanced
       messaging operations are expected to continue to be scaled back in future
       periods.

     - decreased salaries and payroll costs of approximately $5 million for the
       six months ended June 30, 2000, mainly due to lower amount of sales
       commissions incurred in conjunction with decreased revenue levels.

  General and Administrative Expenses

     General and administrative expenses decreased 9.2% to $160 million for the
six months ended June 30, 2000, compared to $176 million for the six months
ended June 30, 1999. The decrease in general and administrative expenses was
primarily due to:

     - decreased contract labor and outside consulting expense of approximately
       $15 million for the six months ended June 30, 2000, primarily related to
       decreased levels of contract labor and outside consulting incurred during
       the first six months of 2000 as PageNet suspended its restructuring in
       January 2000. During the six months ended June 30, 1999, PageNet incurred
       higher contract labor and outside consulting expense primarily related to
       the transition to the centralized processing facilities and costs for
       temporary workforce personnel associated with PageNet's higher than
       normal employee turnover during the first six months of 1999.

     - decreased shipping and postage expense, office supplies expense, and
       employee recruiting and relocation costs of approximately $6 million for
       the six months ended June 30, 2000, mainly due to PageNet's
       implementation of tighter cost controls and its decreased employee
       headcount related to higher than normal employee turnover associated with
       PageNet's restructuring and the merger.

  Depreciation and Amortization Expense

     Depreciation and amortization expense decreased 37.7% to $122 million for
the six months ended June 30, 2000, compared to $196 million for the six months
ended June 30, 1999. Effective April 1, 1999, PageNet changed the depreciable
lives of its subscriber devices from three years to two years and the
depreciable life of some of its network equipment from seven years to ten years.
The changes resulted from PageNet's review of the historical usage periods of
its subscriber devices and its network equipment and PageNet's expectation
regarding future usage periods for subscriber devices considering current and
projected technological advances. PageNet determined that the appropriate useful
life of subscriber devices is two years as a result of technological advances,
customer desire for new pager technology, and PageNet's decreasing ability to
redeploy older pager models. PageNet determined that the appropriate useful life
of network equipment is ten years since this equipment is operational for a
longer time period given current technology. As a result of these changes,
depreciation expense decreased by approximately $8 million during the six months
ended June 30, 2000. PageNet commenced depreciation and amortization on the
assets related to its centralized processing facilities during the third quarter
of 1999. This increased depreciation and amortization expense during the six
months ended June 30, 2000 by approximately $3 million. PageNet commenced
depreciation and amortization of the assets related to its advanced messaging
operations during the first quarter of 2000, which increased depreciation and
amortization expense by approximately $11 million during the six months ended
June 30, 2000, and is expected to increase depreciation and amortization expense
by approximately $24 million for the year ending December 31, 2000.

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<PAGE>   92

  Provision for Asset Impairment

     PageNet recorded a provision of $18 million during the quarter ended March
31, 1999 for the impairment of the assets of PageNet's majority-owned Spanish
subsidiaries. See Note 5 to PageNet's consolidated financial statements.

  Interest Expense

     Interest expense, net of amounts capitalized, was $93 million for the six
months ended June 30, 2000, compared to $74 million for the six months ended
June 30, 1999. The increase in interest expense was primarily due to a decrease
in capitalized interest resulting from the completion of the buildout of
PageNet's advanced wireless network during the first quarter of 2000, and a
higher level of indebtedness outstanding. The amount of interest capitalized
decreased by $10 million for the six months ended June 30, 2000 compared to the
same period of 1999. The average level of indebtedness outstanding during the
six months ended June 30, 2000 was $2.0 billion, compared to $1.9 billion
outstanding during the corresponding period of 1999.

  Change in Accounting Principle

     PageNet adopted the provisions of SOP 98-5 effective January 1, 1999 and
recorded a charge of $37 million as a cumulative effect of a change in
accounting principle to write-off all unamortized start-up costs as of January
1, 1999. See Note 4 to PageNet's consolidated financial statements.

  Adjusted Earnings Before Interest, Income Taxes, Depreciation and Amortization

     As a result of the factors outlined above, adjusted earnings before
interest, income taxes, depreciation and amortization decreased 33.3% to $92
million for the first six months of 2000, compared to $139 million for the
corresponding period of 1999. Adjusted earnings before interest, income taxes,
depreciation and amortization and adjusted earnings before interest, income
taxes, depreciation and amortization as a percentage of total revenues less
costs of products sold for the six months ended June 30, 2000 were negatively
impacted by PageNet's declining revenues (negative $79 million and negative
19.1%, respectively) and its advanced messaging operations (negative $22 million
and negative 5.4%, respectively). Adjusted earnings before interest, income
taxes, depreciation and amortization and adjusted earnings before interest,
income taxes, depreciation and amortization as a percentage of total revenues
less costs of products sold for the six months ended June 30, 1999 were
negatively impacted by PageNet's advanced messaging operations (negative $19
million and negative 3.9%, respectively).

YEAR ENDED DECEMBER 31, 1999 COMPARED WITH THE YEAR ENDED DECEMBER 31, 1998

  Services, Rent and Maintenance Revenues

     Revenues from services, rent and maintenance, which PageNet considers its
primary business, decreased 5.1% to $897 million for the year ended December 31,
1999, compared to $946 million for the year ended December 31, 1998. The average
revenue per unit for PageNet's traditional domestic paging operations increased
to $7.80 for the year ended December 31, 1999, compared to $7.71 for the year
ended December 31, 1998. However, the increases in average revenue per unit,
which resulted from the shift of PageNet's subscriber base toward higher revenue
products and services during early 1999, were offset by an 11.1% reduction in
the number of units in service during the year ended December 31, 1999.

     The number of units in service with subscribers at December 31, 1999 was
approximately 8,991,000, compared to 10,110,000 and 10,344,000 units in service
with subscribers at December 31, 1998 and December 31, 1997. This reduction was
mainly due to the impact of price increases to some of its customers,
intensifying price competition in the market for wireless messaging services,
disruptions in customer service caused by conversions to new centralized
processing facilities systems and infrastructure, and the degree to which
cellular, PCS, and other mobile telephone services, are being subscribed to
instead of traditional paging services such as those offered by PageNet.
Approximately two-thirds of the

                                       85
<PAGE>   93

loss in units in service was a result of continued weakness in PageNet's
reseller channel. Many of the factors that reduced PageNet's units in service in
the fourth quarter of 1999 have continued to exist in 2000. As a result, PageNet
estimates it has lost approximately 570,000 net subscribers in the first quarter
of 2000.

  Product Sales

     Product sales decreased 8.1% to $92 million for the year ended December 31,
1999, compared to $101 million for the year ended December 31, 1998. The
decreases in product sales and cost of products sold from 1998 to 1999 resulted
primarily from increased price competition and competition from cellular, PCS,
and other mobile telephone services, both of which resulted in a substantial
decrease in sales through PageNet's reseller channel. In addition, the decrease
in cost of products sold from 1998 to 1999 also resulted from the decrease in
the depreciable lives of PageNet's subscriber devices from three years to two
years, effective April 1, 1999. This change had the effect of increasing
depreciation expense and thereby reducing the net book values of sold subscriber
devices.

  Services, Rent and Maintenance Expenses

     Services, rent and maintenance expenses increased 26.9% to $267 million for
year ended December 31, 1999, compared to $210 million for the year ended
December 31, 1998. The increase in services, rent and maintenance expenses for
the year ended December 31, 1999 was primarily due to:

     - increased contracted dispatch costs of approximately $17 million,
       primarily related to advanced messaging units placed in service during
       1998 and 1999;

     - increased transmitter site rent expense of approximately $17 million,
       mainly related to the adoption of the provisions of AICPA Statement of
       Position 98-5 "Reporting on the Costs of Start-up Activities" (SOP 98-5),
       effective January 1, 1999, which required start-up costs to be expensed
       as incurred, and an increase in transmitter sites in connection with the
       buildout of PageNet's advanced messaging network;

     - increased telephone expenses of approximately $8 million, primarily
       associated with the operation of the advanced messaging network;

     - increased salaries and payroll costs of technical personnel of
       approximately $7 million, primarily related to the buildout of the
       advanced messaging network; and

     - increased pager parts, repairs and scrap expense of approximately $4
       million.

  Selling Expenses

     Selling expenses decreased 6.6% to $97 million for the year ended December
31, 1999, compared to $104 million for the year ended December 31, 1998. The
decrease in selling expenses for the year ended December 31, 1999 was primarily
due to a decrease in salaries and payroll costs of sales personnel of
approximately $7 million, mainly due to reduced costs incurred associated with
PageNet's telemarketing and reseller sales program. Marketing research,
development costs, and advertising expenses associated with PageNet's
traditional paging and advanced messaging operations are expected to be scaled
back in future periods.

  General and Administrative Expenses

     General and administrative expenses increased 12.7% to $361 million for the
year ended December 31, 1999, compared to $321 million for the year ended
December 31, 1998. The increase in general and administrative expenses was
primarily due to:

     - increased contract labor and outside consulting expense of approximately
       $39 million, primarily related to the transition to the centralized
       processing facilities in 1999 and costs for temporary workforce personnel
       associated with PageNet's higher than normal employee turnover during
       1999;
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<PAGE>   94

     - increased provision of bad debt expense of approximately $8 million,
       related to an increased amount of uncollectible receivables written-off
       from customer accounts during 1999 due to a deterioration of the aging of
       the accounts receivable customer base.

  Depreciation and Amortization Expense

     Depreciation and amortization expense increased 16.3% to $327 million for
the year ended December 31, 1999, compared to $281 million for the year ended
December 31, 1998. The increase in depreciation and amortization expense
resulted primarily from PageNet's change in the depreciable lives of its
subscriber devices and some of its network equipment, effective April 1, 1999.
PageNet changed the depreciable lives of its subscriber devices from three years
to two years and the depreciable life of some of its network equipment from
seven years to ten years. The changes resulted from PageNet's review of the
historical usage periods of its subscriber devices and its network equipment and
PageNet's expectations regarding future usage periods for subscriber devices
considering current and projected technological advances. PageNet determined
that the appropriate useful life of its subscriber devices is two years as a
result of technological advances, customer desire for new pager technology, and
the company's decreasing ability to redeploy older pager models. PageNet
determined that the appropriate useful life of its network equipment is ten
years since this equipment is operational for a longer time period given current
technology. As a result of these changes, depreciation expense increased by
approximately $78 million during the year ended December 31, 1999. PageNet also
commenced depreciation and amortization on the assets related to its centralized
processing facilities during the third quarter of 1999. This increased
depreciation and amortization expense during 1999 by approximately $4 million.
PageNet has commenced depreciation and amortization on the assets related to its
advanced messaging operations during the first quarter of 2000, which is
expected to increase depreciation and amortization expense during 2000 by
approximately $24 million.

  Provision for Asset Impairment

     PageNet recorded a provision of $18 million during the year ended December
31, 1999, for the impairment of the assets of PageNet's majority-owned Spanish
subsidiaries. See Note 5 to PageNet's consolidated financial statements for the
year ended December 31, 1999.

  Restructuring Charge

     PageNet recorded a partial reversal of its restructuring charge in the
amount of $24 million during the year ended December 31, 1999. See Note 4 to
PageNet's consolidated financial statements for the year ended December 31,
1999.

  Interest Expense

     Interest expense, net of amounts capitalized, was $151 million for the year
ended December 31, 1999, compared to $144 million for the year ended December
31, 1998. The increase in interest expense from 1998 to 1999 was primarily due
to the higher average level of indebtedness outstanding during 1999. The average
level of indebtedness outstanding during 1999 was $1.9 billion, compared to $1.8
billion outstanding during 1998.

  Change in Accounting Principle

     PageNet adopted the provisions of SOP 98-5 effective January 1, 1999 and
recorded a charge of $37 million as the cumulative effect of a change in
accounting principle to write-off all remaining unamortized start-up costs as of
January 1, 1999. See Note 6 to PageNet's consolidated financial statements for
the year ended December 31, 1999.

                                       87
<PAGE>   95

  Adjusted Earnings Before Interest, Income Taxes, Depreciation and Amortization

     As a result of the factors outlined above, adjusted earnings before
interest, income taxes, depreciation and amortization decreased 38.1% to $206
million for the year ended December 31, 1999, compared to $333 million for the
same period in 1998. Adjusted earnings before interest, income taxes,
depreciation and amortization and adjusted earnings before interest, income
taxes, depreciation and amortization as a percentage of total revenues less cost
of products sold for 1999 were negatively impacted by declines in PageNet's
revenues (of $56 million and 6.0%, respectively), the costs associated with its
advanced messaging operations ($57 million and 6.2%, respectively), the costs of
development and implementation of its centralized processing facilities ($16
million and 1.7%, respectively), and the costs of adoption of SOP 98-5 ($21
million and 2.3%, respectively).

YEAR ENDED DECEMBER 31, 1998 COMPARED WITH THE YEAR ENDED DECEMBER 31, 1997

  Services, Rent and Maintenance Revenues

     Revenues from services, rent and maintenance increased 15.5% to $946
million for the year ended December 31, 1998, compared to $818 million for the
year ended December 31, 1997. The increase in revenues from services, rent and
maintenance was primarily due to an increase in average revenue per unit
resulting from the shift of PageNet's subscriber base toward higher revenue
products and services.

     The average revenue per unit for PageNet's traditional paging domestic
operations increased to $7.71 for the year ended December 31, 1998, compared to
$7.20 for the corresponding period of 1997. The number of units in service with
subscribers at December 31, 1998, was 10,110,000, a decrease of approximately
234,000 units in service compared to 10,344,000 units in service with
subscribers at December 31, 1997.

  Product Sales

     Product sales decreased 29.5% to $101 million for the year ended December
31, 1998 compared to $143 million for the year ended December 31, 1997. The
decrease in product sales and corresponding decrease in cost of products sold
from 1997 to 1998 resulted primarily from PageNet's price increases and other
factors, including increased competition from cellular, PCS, and other mobile
phones, which resulted in a substantial decrease in sales through the reseller
channel.

  Services, Rent and Maintenance Expenses

     Services, rent and maintenance expenses increased 21.6% to $210 million for
the year ended December 31, 1998, compared to $173 million for the year ended
December 31, 1997. The increase in services, rent, and maintenance expenses was
partially a result of:

     - increased telephone expenses of approximately $6 million, mainly
       associated with the enactment of regulations requiring that the providers
       of pay phones be compensated for all calls placed from pay phones to
       toll-free numbers. This requirement increased PageNet's cost of providing
       toll-free number service commencing in the fourth quarter of 1997;

     - increased contracted dispatch costs of approximately $8 million, mainly
       related to advanced messaging units placed in service during 1998;

     - increased transmitter site rent expense of approximately $5 million
       associated with an increase in the number of transmitter sites;

     - increased pager parts and repairs expense of approximately $12 million,
       primarily the result of management's decision to increase its pager
       redeployment efforts.

                                       88
<PAGE>   96

  Selling Expenses

     Selling expenses were $104 million for the year ended December 31, 1998,
compared to $103 million for the year ended December 31, 1997. The decrease in
selling expenses as a percentage of total revenues from 1997 to 1998 resulted
primarily from a decrease in advertising expenses of approximately $3 million,
mainly related to a decline in marketing research, development costs, and
advertising expenses associated with the suspension of the promotion of
PageNet's VoiceNow service.

  General and Administrative Expenses

     General and administrative expenses increased 26.3% to $321 million for the
year ended December 31, 1998, compared to $254 million for the year ended
December 31, 1997. The increase in general and administrative expenses from 1997
to 1998 was primarily related to:

     - increased contract labor expense of approximately $43 million, mainly
       associated with increased levels of contract labor utilized during the
       transition to the centralized processing facilities;

     - approximately $6 million attributable to expenses associated with
       establishing PageNet's centralized processing facilities and redundant
       operating costs associated with operating both the new centralized
       processing facilities infrastructure and the traditional decentralized
       infrastructure.

  Depreciation and Amortization Expense

     Depreciation and amortization expense decreased 2.8% to $281 million for
the year ended December 31, 1998, compared to $289 million for the year ended
December 31, 1997. The decrease in depreciation and amortization expense from
1997 to 1998 resulted primarily from certain property and equipment becoming
fully depreciated, certain non-current assets becoming fully amortized, and the
decline in capital expenditures of approximately $60 million.

  Restructuring Charge

     PageNet recorded a restructuring charge of $74 million during the year
ended December 31, 1998, as a result of a restructuring approved by PageNet's
board of directors in February 1998. See Note 4 of PageNet's consolidated
financial statements.

  Interest Expense

     Interest expense, net of amounts capitalized, was $144 million for the year
ended December 31, 1998, compared to $151 million for the year ended December
31, 1997. The decrease in interest expense from 1997 to 1998 was primarily
attributable to an increase in interest capitalized of approximately $6 million,
a decrease in interest rates on outstanding borrowings under PageNet's credit
agreement, and the redemption of PageNet's 11.75% subordinated notes on May 14,
1997 with lower interest rate funds borrowed under the credit agreement.

  Adjusted Earnings Before Interest, Income Taxes, Depreciation and Amortization

     Adjusted earnings before interest, income taxes, depreciation and
amortization increased 7.6% to $333 million for the year ended December 31,
1998, compared to $310 million for the year ended December 31, 1997. Adjusted
earnings before interest, income taxes, depreciation and amortization and
adjusted earnings before interest, income taxes, depreciation and amortization
as a percentage of total revenues less cost of products sold for 1998 were
negatively impacted by the costs associated with PageNet's advanced messaging
operations ($25 million and 2.6%, respectively), the costs of forming of its
centralized processing facilities ($13 million and 1.3%, respectively), and its
international operations ($6 million and 0.6%, respectively).

  INFLATION

     Inflation has not had a material effect on PageNet's operations to date.
Paging systems equipment and operating costs have generally not increased in
price and PageNet's pager costs have declined substantially in recent years.
This reduction in costs has generally been reflected in lower pager prices
charged to

                                       89
<PAGE>   97

subscribers who purchase their units. PageNet's general and administrative
operating expenses, such as salaries, employee benefits and occupancy costs are
subject to normal inflationary pressures.

  YEAR 2000 COMPLIANCE

     PageNet implemented a task force, and developed a comprehensive plan to
address Year 2000 issues. PageNet completed all of the phases for its critical
business processes and, to date, has not experienced any material Year
2000-related errors. PageNet believes that all mission critical vendors have
successfully readied their systems for the Year 2000 and, to date, has not
experienced any Year 2000-related errors in its systems.

                                       90
<PAGE>   98

                  MARKET PRICE INFORMATION AND DIVIDEND POLICY

COMPARATIVE PRICE INFORMATION

     Arch common stock is traded on the Nasdaq National Market System under the
symbol "APGR." PageNet common stock was traded on the Nasdaq SmallCap Market
under the symbol "PAGE" until July 14, 2000, when trading was suspended due to
PageNet's chapter 11 proceeding. Trading of PageNet common stock commenced in
the over-the-counter market under the same "PAGE" symbol on July 27, 2000. The
following table sets forth the high and low trading prices per share of Arch
common stock and PageNet common stock on the Nasdaq, and the high and low
trading prices of PageNet common stock in the over-the-counter market, for the
quarterly periods indicated, which correspond to the companies' respective
quarterly fiscal periods for financial reporting purposes.

<TABLE>
<CAPTION>
                                                         ARCH                   PAGENET
                                                     COMMON STOCK             COMMON STOCK
                                                ----------------------   ----------------------
                                                  HIGH          LOW        HIGH          LOW
                                                ---------    ---------   ---------    ---------
<S>                                             <C>          <C>         <C>          <C>
Fiscal Year Ended December 31, 1998:
  First Quarter.............................    $18.37500    $ 9.00000   $16.37500    $ 9.50000
  Second Quarter............................    $20.81250    $10.50000   $16.62500    $12.50000
  Third Quarter.............................    $15.00000    $ 5.06250   $14.62500    $ 4.81250
  Fourth Quarter............................    $ 5.43750    $ 2.06250   $ 7.37500    $ 3.56250
Fiscal Year Ended December 31, 1999:
  First Quarter.............................    $ 7.50000    $ 3.18750   $ 7.00000    $ 3.87500
  Second Quarter............................    $11.62500    $ 3.37500   $ 4.93750    $ 3.00000
  Third Quarter.............................    $ 8.87500    $ 3.90625   $ 6.87500    $ 0.71875
  Fourth Quarter............................    $ 7.75000    $ 3.50000   $ 1.71875    $ 0.59375
Fiscal Year Ended December 31, 2000:
  First Quarter.............................    $16.25000    $ 5.56250   $ 6.03125    $ 0.71875
  Second Quarter............................    $ 8.50000    $ 4.00000   $ 3.00000    $ 0.62500
  Third Quarter (through August 29, 2000)...    $ 7.50000    $ 4.50000   $ 2.00000    $ 0.40625
</TABLE>

     The following table presents trading information for PageNet common stock
and Arch common stock for November 5, 1999 and August 29, 2000. November 5, 1999
was the last full trading day prior to the public announcement of the proposed
merger. August 29, 2000 was the last practicable trading day for which
information was available prior to the date of the first mailing of this proxy
statement. The table provides trading information for (1) one share of PageNet
common stock, (2) one share of Arch common stock and (3) 0.08365112 shares of
Arch common stock, which is the equivalent of one share of PageNet common stock
based on the exchange ratio to be used in the merger, exclusive of the value of
shares of Vast to be received by PageNet stockholders.

<TABLE>
<CAPTION>
                                   ARCH                          PAGENET                            ARCH
                               COMMON STOCK                    COMMON STOCK                 PRO FORMA EQUIVALENT
                       ----------------------------   ------------------------------   ------------------------------
                         HIGH       LOW      CLOSE      HIGH       LOW       CLOSE       HIGH       LOW       CLOSE
                       --------   -------   -------   --------   --------   --------   --------   --------   --------
<S>                    <C>        <C>       <C>       <C>        <C>        <C>        <C>        <C>        <C>
November 5, 1999.....  $7.12500   $6.3750   $6.8125   $1.03125   $0.90625   $0.96875   $0.59601   $0.53328   $0.56987
August 29, 2000......  $5.03125   $4.6875   $5.0000   $0.32000   $0.26000   $0.28000   $0.42087   $0.39211   $0.41826
</TABLE>

DIVIDEND POLICY

     Neither Arch nor PageNet has ever declared or paid any cash dividends on
its common stock. Arch anticipates that substantially all of its earnings in the
foreseeable future will be used to finance the continued growth and development
of its business and has no current intention to pay cash dividends. Arch's
future dividend policy will depend on its earnings, capital requirements and
financial condition, as well as requirements of its financing agreements and
other factors that Arch's board of directors considers

                                       91
<PAGE>   99

relevant. Arch's secured credit facility prohibits declaration or payment of
cash dividends to Arch stockholders without the written consent of a majority of
the lenders. The terms of other outstanding indebtedness only permit the
declaration or payment of cash dividends if specified leverage and cash flow
requirements are met. Arch does not currently meet these requirements. See
"Description of Indebtedness."

                                       92
<PAGE>   100

         COMPARATIVE HISTORICAL AND UNAUDITED PRO FORMA PER SHARE DATA

     The following table sets forth historical per share data of Arch and
PageNet and combined per share data on an unaudited pro forma basis after giving
effect to the merger based on the purchase method of accounting. This data
should be read in conjunction with the selected financial data and the
historical financial statements of Arch and PageNet and notes. The pro forma
information is presented for informational purposes only and is not necessarily
indicative of the financial position or results of operations that would have
occurred if Arch and PageNet had been a single entity during the period
presented nor is it necessarily indicative of the results of operations which
may occur in the future.

<TABLE>
<CAPTION>
                                                                 HISTORICAL      PRO FORMA
                                                              ----------------   ---------
                                                               ARCH    PAGENET   COMBINED
                                                              ------   -------   ---------
<S>                                                           <C>      <C>       <C>
As of and for the year ended December 31, 1999:
  Net loss per share before extraordinary items and
     cumulative effect of a change in accounting
     principle -- basic and diluted.........................  $(9.21)  $(2.52)    $(2.56)
  Book value per common share...............................  $(4.25)  $(7.60)    $ 4.18
</TABLE>

<TABLE>
<CAPTION>
                                                                 HISTORICAL      PRO FORMA
                                                              ----------------   ---------
                                                               ARCH    PAGENET   COMBINED
                                                              ------   -------   ---------
<S>                                                           <C>      <C>       <C>
As of and for the six months ended June 30, 2000:
  Net loss per share before extraordinary items and
     cumulative effect of a change in accounting
     principle -- basic and diluted.........................  $(2.26)  $(1.17)    $(1.33)
  Book value per common share...............................  $(2.20)  $(8.73)    $ 3.43
</TABLE>

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<PAGE>   101

                               INDUSTRY OVERVIEW

     The mobile wireless telecommunications industry currently consists of
multiple voice and data providers which compete among one another, both directly
and indirectly, for subscribers. Traditional paging carriers like PageNet and
Arch provide customers with services such as numeric and alphanumeric paging.
Customers receive these paging services through a small, handheld device known
as a pager. A pager signals a customer when a message is received through a tone
and/or vibration and displays the incoming message on a small screen. With
numeric paging services the pager displays numeric messages, such as a telephone
number. With alphanumeric paging services the pager is capable of displaying
numeric messages and text messages on their pagers. These two types of paging
services are commonly referred to as messaging services.

     Traditional paging carriers like PageNet and Arch also provide other
services via pagers, commonly referred to as advanced messaging services.
Advanced messaging services include confirmed receipt paging services, which
enable subscribers to receive acknowledgements that their messages were
delivered, services which enable subscribers to respond to messages with their
messaging devices by using pre-scripted replies, and send-and-receive services,
which enable subscribers to initiate messages and to respond to messages with
their messaging devices by using pre-scripted replies or by creating original
replies. Advanced messaging services have only been offered for a short period
of time, and account for less than 1% of revenue for both PageNet and Arch.
Traditional paging carriers, like PageNet and Arch, also offer enhanced wireless
messaging services such as stock quotes, news, voice mail and personalized
greeting.

     Mobile telephone service providers such as cellular and broadband PCS
carriers provide telephone voice services as well as services that are
functionally identical to the messaging and advanced messaging services provided
by paging carriers such as PageNet and Arch. Customers subscribing to cellular,
broadband PCS or other mobile phone services utilize a wireless handset through
which they can make and receive voice telephone calls. These handsets are
commonly referred to as a cellular or PCS phones. These handsets are also
capable of receiving numeric and alphanumeric messages as well as information
services, such as stock quotes, news, voice mail, personalized greeting and
message storage and retrieval.

     Technological improvements have generally contributed to strong growth in
the market for mobile wireless services and the provision of better quality
services at lower prices to subscribers. Companies providing traditional
messaging services have benefited from technological advances resulting from
research and development conducted by vendors of paging units and transmission
equipment. These advances include microcircuitry, liquid crystal display
technology and standard digital encoding formats. These advances have enhanced
the capability and capacity of mobile wireless messaging services while lowering
equipment and air time costs. However, these technological improvements, and the
degree of similarity in pagers, coverage and battery life have resulted in
messaging services becoming commodity products with price likely to be the most
significant factor in a subscriber's decision making.

     Other mobile wireless alternatives, particularly cellular and PCS services,
have similarly experienced rapid changes through technological improvement which
has resulted in more consumer interest and demand. Messaging services offered by
cellular, PCS and other mobile phone providers are substantially similar to the
numeric and alphanumeric messaging services offered by PageNet and Arch and are
now available in conjunction with most mobile phone services.

     The number of new subscribers to cellular, PCS and other mobile phone
services continues to increase each year. By one analyst's estimates, there were
a total of over 86 million such subscribers in the United States at the end of
1999. This estimate reflects an increase of approximately 25% over the
approximately 69 million subscribers estimated at the end of 1998. This trend is
expected to continue. The same analyst predicts an average annual subscriber
growth rate of approximately 13% through the year 2003 for cellular, PCS and
other mobile phone services.

     Arch believes that approximately 44.7 million subscribers subscribed to
basic numeric and alphanumeric paging services in the United States as of the
end of 1999. Arch believes that the traditional

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<PAGE>   102

paging industry did not grow during 1999, that demand for traditional paging
services will decline in 2000 and in the following year, and that any
significant future growth in the wireless messaging industry will be
attributable to advanced messaging services. The decline is attributable to
traditional paging customers discontinuing their use of messaging services in
favor of using their mobile phones for combined voice and messaging services.
Although there can be no assurances they will be successful, PageNet and Arch
are committed to expanding their service offerings, especially their advanced
messaging services, to ensure that their services remain competitive under
rapidly changing market conditions.

     Messaging subscribers such as those served by PageNet and Arch typically
pay a flat monthly service fee for paging services, unlike subscribers to
cellular telephone or PCS services, whose bills historically have had a
significant variable usage component. However, cellular, PCS and other mobile
phone companies now offer flat rate pricing plans which include both local and
long distance minutes for use at no additional charge. These and other plans
have lowered the price point so that these services compete directly with the
services PageNet and Arch offer. PageNet and Arch are sensitive to these
technological and availability changes and are working to design competitively
attractive values for the consumer.

     The wireless messaging industry originally distributed its services through
direct marketing and sales activities. Additional channels of distribution have
evolved. These channels include:

     - company-operated stores;

     - resellers, who purchase services on a wholesale basis from the companies
       and resell those services on a retail basis to their own customers;

     - agents who solicit customers for companies and are compensated on a
       commission basis;

     - retail outlets that often sell a variety of merchandise, including pagers
       and other telecommunications equipment; and

     - most recently, the Internet.

REGULATION

     Federal Regulation -- Overview

     PageNet's and Arch's wireless messaging operations are subject to
regulation by the Federal Communications Commission under federal communications
laws and regulations. The Federal Communications Commission has granted PageNet
and Arch licenses to use the radio frequencies necessary to conduct their
business. Licenses issued by the Federal Communications Commission to PageNet
and Arch set forth the technical parameters, such as power strength and tower
height, under which PageNet and Arch are authorized to use those frequencies.
Each Federal Communications Commission license held by PageNet or Arch has
construction and operational requirements that must be satisfied within set time
frames. The Federal Communications Commission has the authority to auction most
new licenses over which wireless mobile services are traditionally offered but
does not have the authority to use auctions for license renewals or license
modifications.

     The Federal Communications Commission licenses granted to PageNet and Arch
have varying terms of up to 10 years, at the end of which time renewal
applications must be approved by the Federal Communications Commission. In the
past, Federal Communications Commission renewal applications have been routinely
granted, in most cases upon a demonstration of compliance with Federal
Communications Commission regulations and adequate service to the public. The
Federal Communications Commission has granted each renewal license PageNet and
Arch have filed, other than those which are pending. Although PageNet and Arch
are unaware of any circumstances which would prevent the grant of any pending or
future renewal applications, no assurance can be given that any of PageNet's or
Arch's licenses will be renewed by the Federal Communications Commission.
Furthermore, although revocation and involuntary modification of licenses are
extraordinary regulatory measures, the Federal Communications Commission has the
authority to restrict the operation of licensed facilities or revoke or modify
licenses. No license of PageNet or Arch has ever been revoked or modified
involuntarily.

                                       95
<PAGE>   103

     The Federal Communications Commission's review and revision of rules
affecting companies such as PageNet and Arch is ongoing. The regulatory
requirements to which PageNet and Arch are subject may change significantly over
time. For example, the Federal Communications Commission has adopted rules for
licensing particular messaging channels throughout a broad geographic area.
These licenses are being awarded through an auction. Incumbent messaging
carriers that are already licensed by the Federal Communications Commission in
these broad geographic areas are entitled to continue to operate without
interference from the auction winners.

     In many instances, PageNet and Arch still require the prior approval of the
Federal Communications Commission before they can implement any significant
changes to their messaging networks. Once the Federal Communications
Commission's broad geographic licensing rules are implemented, however, many of
these licensing obligations will be eliminated.

     The Federal Communications Commission has sought comment on adopting new
rules for certain frequencies licensed to and operated by PageNet and Arch on a
nationwide basis. If the Federal Communications Commission were to impose
additional, more stringent coverage requirements for these nationwide
frequencies, PageNet and Arch might have to accelerate the build out of their
systems.

     Federal communications laws and regulations require licensees such as
PageNet and Arch to obtain prior approval from the Federal Communications
Commission for the transfer of control of any construction permit or station
license. These regulations also require prior approval by the Federal
Communications Commission of acquisitions of other messaging companies by
PageNet and Arch and transfers by PageNet and Arch of a controlling interest in
any of their licenses or construction permits. The Federal Communications
Commission has approved each acquisition and transfer of control for which
PageNet or Arch have sought approval, including those contemplated in connection
with the merger. PageNet and Arch also regularly apply for Federal
Communications Commission authority to use additional frequencies, modify the
technical parameters of existing licenses, expand their service territory,
provide new services, and modify the conditions under which they provide
service. Although there can be no assurance that any requests for approval of
applications filed by PageNet and Arch will be approved or acted upon in a
timely manner by the Federal Communications Commission, or that the Federal
Communications Commission will grant the relief requested, PageNet and Arch know
of no reason to believe any such requests, applications, or relief will not be
approved or granted. Neither PageNet nor Arch make any representations, however,
about the continued availability of additional frequencies used to provide their
services.

Foreign Ownership Restrictions

     Foreign ownership of entities that directly or indirectly hold certain
licenses from the Federal Communications Commission is limited, including some
of those held by PageNet or Arch. Because PageNet and Arch hold licenses from
the Federal Communications Commission only through subsidiaries, up to 25% of
either company's common stock can be owned or voted by aliens or their
representatives, a foreign government or its representatives, or a foreign
corporation, without restriction. However, if more than 25% of either company's
common stock is owned or voted by aliens or their representatives, a foreign
corporation, or a foreign government or its representatives, the Federal
Communications Commission has the right to revoke or refuse to grant licenses if
it finds that such revocation or refusal serves the public interest. The Federal
Communications Commission has indicated that, pursuant to the World Trade
Organization Telecommunications Agreement, it would waive the 25% limitation in
appropriate circumstances. Based upon information obtained by PageNet and Arch,
each of PageNet and Arch believe that substantially less than 25% of their
issued and outstanding common stock is owned by aliens or their representatives,
foreign governments or their representatives, or foreign corporations. PageNet
and Arch subsidiaries that are radio common carrier licensees are subject to
more stringent requirements and may have only up to 20% of their stock owned or
voted by aliens or their representatives, a foreign government or their
representatives or a foreign corporation. This ownership restriction is not
subject to waiver.

                                       96
<PAGE>   104

Limitations on Allocation of Numbers

     Increased demand for telephone numbers, particularly in metropolitan areas,
is causing depletion of numbers in some of the more popular area codes. Recent
plans to address this increased demand have included elements that could impact
PageNet's and Arch's operations, including the take-back of numbers already
assigned for use and service-specific plans whereby only some services, such as
paging and cellular, would be assigned numbers using a new area code, or plans
which require the pooling of blocks of numbers for use by multiple carriers.
Neither PageNet nor Arch can provide any assurance as to whether such plans will
be adopted by a federal or state commission, or whether such plans will require
PageNet or Arch to incur further, substantial expenses in order to continue to
obtain telephone numbers for their subscribers.

Interconnection

     Recent amendments to federal communications laws are intended to promote
competition in the provision of phone services by removing legal or other
barriers to entry. Specifically, all telecommunications carriers have the duty
to interconnect with the facilities and equipment of other telecommunications
carriers. The Federal Communications Commission, and the 9th Circuit Court of
Appeals, among others, have interpreted this duty as requiring certain local
telephone companies to compensate mobile wireless companies for calls originated
by customers of the local telephone companies which terminate on a mobile
wireless company's network. The Federal Communications Commission has also found
to be unlawful charges to messaging companies in the past that have been
assessed on a monthly basis by certain local telephone companies for the use of
interconnection facilities, including telephone numbers. These findings by the
Federal Communications Commission have been challenged at the Federal
Communications Commission and in the courts. Neither PageNet nor Arch can
predict with certainty the ultimate outcome of these proceedings. Compensation
amounts may be determined in subsequent proceedings either at the federal or
state level, or may be determined based on negotiations between the local
telephone companies and the messaging companies. Any agreements reached between
the local telephone companies and the messaging companies may be required to be
submitted to a state regulatory commission for approval. PageNet has negotiated
interconnection agreements with some major local telephone companies and is in
negotiations with other local telephone companies but can provide no assurances
that it will obtain interconnection agreements with all local telephone
companies. Arch is also in negotiations with local telephone companies, but as
with PageNet in markets where PageNet has not reached agreements, it may or may
not be successful in securing refunds, future relief, or both, with respect to
charges for termination of local telephone companies originated local traffic.
If these issues are ultimately decided in favor of the local telephone
companies, Arch, and to a lesser extent PageNet because of the agreements it has
reached, may be required to pay past due contested charges and may also be
assessed interest and late charges for amounts withheld.

Additional Regulatory Obligations and Benefits

     The Federal Communications Commission has determined that companies such as
PageNet and Arch are required to contribute to "Universal Service" or other
funds to assure the continued availability of local phone service to high cost
areas, as well as to contribute funds to cover other designated costs or
societal goals. Further, providers of payphones must be compensated for all
calls placed from pay telephones to toll-free numbers. This latter requirement
increases PageNet's and Arch's costs of providing toll-free number service, and
there are no assurances that either PageNet or Arch will be able to continue to
pass on to their subscribers these, or other increased costs imposed by federal
or state telecommunication regulators. Beneficially, the laws now limit the
circumstances under which states and local governments may deny a request by
most wireless companies to place transmission facilities in residential
communities and business districts, and give the Federal Communications
Commission the authority to preempt the states in some circumstances.

     The laws require some telecommunications companies, including PageNet and
Arch, to modify the design of their equipment or services to ensure that
electronic surveillance or interceptions can be
                                       97
<PAGE>   105

performed. Technical parameters applicable to the messaging industry have been
established but not acknowledged by all governmental bodies to date. Therefore,
neither PageNet nor Arch can determine at this time what compliance measures
will be required or the costs thereof. In addition, the Federal Communications
Commission has instituted proceedings addressing the manner in which
telecommunications carriers are permitted to jointly market certain types of
services, and the manner in which telecommunications carriers render bills for
these services. Depending on the outcome of these proceedings, PageNet, Arch,
and other telecommunications carriers could incur higher administration and
other costs in order to comply.

State Regulation

     In addition to potential regulation by the Federal Communications
Commission, some states have the authority to regulate messaging services,
except where such regulation affects or relates to the rates charged to
customers and/or the ability of companies like Arch or PageNet to enter a
market. Such regulations have been preempted by the federal communications laws.
States may petition the Federal Communications Commission for authority to
continue to regulate commercial mobile radio service rates if certain conditions
are met. State filings seeking rate authority have all been denied by the
Federal Communications Commission, although new petitions seeking such authority
may be filed in the future. Furthermore, some states and localities continue to
exert jurisdiction over (1) approval of acquisitions of assets and transfers of
licenses of mobile wireless systems and (2) resolution of consumer complaints.
PageNet and Arch believe that to date all required filings for their respective
messaging operations have been made. All state approvals of acquisitions or
transfers made by PageNet and Arch have been approved, and neither PageNet nor
Arch knows of any reason to believe such approvals will not continue to be
granted in connection with any future requests, even if states exercise that
review.

     The laws do not preempt state regulatory authority over other aspects of
PageNet's and Arch's operations, and some states may choose to exercise such
authority. Some state and local governments have imposed additional taxes or
fees upon some of the activities in which PageNet and Arch are engaged. In
addition, the construction and operation of radio transmitters may be subject to
zoning, land use, public health and safety, consumer protection and other state
and local taxes, levies and ordinances. As noted above, the Federal
Communications Commission may delegate to the states authority over telephone
number allocation and assignment.

                                       98
<PAGE>   106

                                ARCH'S BUSINESS

     Arch is a leading provider of wireless messaging services, primarily
traditional paging services, in the United States. Arch has established a market
presence in major metropolitan markets as well as in middle and small markets.
In addition, Arch's third-party retail distribution agreements complement the
more than 375 Arch-operated retail outlets. Similarly, Arch's nationwide
coverage utilizing two paging frequencies enables Arch to provide its services
on a nationwide basis to more subscribers. Arch's nationwide coverage also
enhances Arch's local coverage and provides an opportunity for Arch to take
advantage of Arch's distribution networks.

     Arch's plan to deploy the nationwide radio frequencies it is authorized to
use under its narrowband PCS authorizations using its existing network
infrastructure, together with its strategic alliances, should permit Arch to
market advanced messaging services sooner than it would otherwise be able to.
These services are expected to offer higher revenue and more growth potential
than basic messaging services. Finally, Arch's investments to date in two
national call centers and additional regional call centers should supplement its
previously developed call center and complement its strategy of evolving to
regional customer service centers. Achieving these intended benefits, however,
will depend on a number of factors and no assurance can be given that the
benefits will be realized, in whole or in part. See "Arch Management's
Discussion and Analysis of Financial Condition and Results of Operations" and
"-- Networks and Licenses."

     The expected effects of the PageNet merger on Arch's business are described
under "The Combined Company -- Business."

WIRELESS MESSAGING SERVICES, PRODUCTS AND OPERATIONS

     Arch provides wireless messaging services and advanced messaging services.
Arch operates in all 50 states and the District of Columbia and in each of the
100 largest markets in the United States. Arch offers these services on a local,
regional and nationwide basis employing digital networks covering more than 90%
of the United States population.

     The following table sets forth information about the approximate number of
units in service with Arch subscribers and net changes in number of units
through internal operations and acquisitions since 1995:

<TABLE>
<CAPTION>
                                                        NET INCREASE
                                 UNITS IN SERVICE       (DECREASE) IN       INCREASE IN UNITS    UNITS IN SERVICE
                                 AT BEGINNING OF        UNITS THROUGH            THROUGH            AT END OF
YEAR ENDED DECEMBER 31,               PERIOD         INTERNAL OPERATIONS      ACQUISITIONS            PERIOD
-----------------------          ----------------    -------------------    -----------------    ----------------
<S>                              <C>                 <C>                    <C>                  <C>
  1995.........................       538,000              366,000              1,102,000            2,006,000
  1996.........................     2,006,000              815,000                474,000            3,295,000
  1997.........................     3,295,000              595,000                     --            3,890,000
  1998.........................     3,890,000              386,000                     --            4,276,000
  1999.........................     4,276,000              (89,000)             2,762,000            6,949,000
<CAPTION>
SIX MONTHS ENDED JUNE 30,
-------------------------
<S>                              <C>                 <C>                    <C>                  <C>
  2000.........................     6,949,000             (277,000)                    --            6,672,000
</TABLE>

     Net increase (decrease) in units through internal operations includes
internal changes from acquired paging businesses after their acquisition by Arch
and is net of subscriber cancellations during each applicable period. Increase
in units through acquisitions is based on units in service of acquired paging
businesses at the time of their acquisition by Arch.

     Numeric paging service, which was introduced by the paging industry nearly
20 years ago, currently represents a majority of all units in service. The
growth of alphanumeric paging service, which was introduced in the mid-1980s,
has been constrained by its difficulties, such as inputting data, specialized
equipment requirements and its relatively high use of system capacity during
transmission, which has, to some extent, been relieved by deploying alternate
communications pathways, such as the Internet.

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<PAGE>   107

     The following table summarizes the types of Arch's units in service at
specified dates:

<TABLE>
<CAPTION>
                                       DECEMBER 31,       DECEMBER 31,       DECEMBER 31,         JUNE 30,
                                           1997               1998               1999               2000
                                      ---------------    ---------------    ---------------    ---------------
                                        UNITS      %       UNITS      %       UNITS      %       UNITS      %
<S>                                   <C>         <C>    <C>         <C>    <C>         <C>    <C>         <C>
Local Numeric.....................    3,284,000    85%   3,586,000    84%   5,299,000    76%   4,937,000    74%
Local Alphanumeric................      524,000    13      621,000    14    1,215,000    18    1,335,000    20
Tone-only.........................       82,000     2       69,000     2       48,000     1       36,000    --
Nationwide Numeric................           --    --           --    --      219,000     3      189,000     3
Nationwide Alphanumeric...........           --    --           --    --      168,000     2      175,000     3
                                      ---------   ---    ---------   ---    ---------   ---    ---------   ---
         Total....................    3,890,000   100%   4,276,000   100%   6,949,000   100%   6,672,000   100%
                                      =========   ===    =========   ===    =========   ===    =========   ===
</TABLE>

     Arch provides messaging services to subscribers for a monthly fee.
Subscribers either lease the unit from Arch for an additional fixed monthly fee
or they own the unit, having purchased it either from Arch or from another
vendor. Arch-owned units leased to subscribers require capital investment by
Arch, while customer-owned and maintained units, commonly referred to as COAM
units, and those owned by resellers do not. The monthly service fee is generally
based upon the type of service provided, the geographic area covered, the number
of units provided to the customer and the period of the subscriber's commitment.
Subscriber-owned units provide a more rapid recovery of Arch's capital
investment than units owned and maintained by Arch, but may generate less
recurring revenue. Arch also sells units to third-party resellers who lease or
resell units to their own subscribers and resell Arch's wireless messaging
services under marketing agreements. Resellers are responsible for sales,
billing, collection and equipment maintenance costs. Arch sells other products
and services, including units and accessories and unit replacement and
maintenance contracts. The following table summarizes the number of Arch-owned
and leased, subscriber-owned and reseller-owned units in service at specified
dates. Although the following table reflects an increase in Arch-owned and
leased units, this increase is due to Arch's acquisition of MobileMedia in 1999.
MobileMedia had a customer base that had proportionately larger accounts that
negotiated for leased units rather than subscriber-owned units:

<TABLE>
<CAPTION>
                                       DECEMBER 31,       DECEMBER 31,       DECEMBER 31,         JUNE 30,
                                           1997               1998               1999               2000
                                      ---------------    ---------------    ---------------    ---------------
                                        UNITS      %       UNITS      %       UNITS      %       UNITS      %
<S>                                   <C>         <C>    <C>         <C>    <C>         <C>    <C>         <C>
Arch-owned and leased.............    1,740,000    45%   1,857,000    43%   3,605,000    52%   3,558,000    53%
Subscriber-owned..................    1,087,000    28    1,135,000    27    1,518,000    22    1,519,000    23
Reseller-owned....................    1,063,000    27    1,284,000    30    1,826,000    26    1,595,000    24
                                      ---------   ---    ---------   ---    ---------   ---    ---------   ---
         Total....................    3,890,000   100%   4,276,000   100%   6,949,000   100%   6,672,000   100%
                                      =========   ===    =========   ===    =========   ===    =========   ===
</TABLE>

     Arch provides enhanced wireless messaging services such as voice mail,
wireless information delivery services, personalized greetings, message storage
and retrieval, pager loss protection and pager maintenance services. Voice mail
allows a caller to leave a recorded message that is stored in Arch's
computerized message retrieval center. When a message is left, the subscriber
can be automatically alerted through the subscriber's pager and can retrieve the
stored message by calling Arch's paging terminal. Personalized greetings allow
the subscriber to record a message to greet callers who reach the subscriber's
pager or voice mail box. Message storage and retrieval allows a subscriber who
leaves Arch's service area to retrieve calls that arrived during the
subscriber's absence from the service area. Pager loss protection allows
subscribers who lease pagers to limit their costs of replacement upon loss or
destruction of a pager. Pager maintenance services are offered to subscribers
who own their own equipment. Wireless information delivery allows subscribers to
receive stock quotes, news and weather through their Arch service. Arch is also
in the process of test marketing various other services that add value, and can
be integrated with existing paging services.

                                       100
<PAGE>   108

NETWORKS AND LICENSES

     Arch operates local, regional and national networks which enable its
customers to receive pages over a broad geographic area. Many of these networks
were acquired in the MobileMedia acquisition. Arch's extensive geographic
coverage may be attractive to large corporate clients and retail chains which
frequently demand national network coverage from their paging service provider.

     Arch's networks provide local, regional and national coverage and its
networks operate over numerous frequencies. Although the capacity of Arch's
networks varies significantly market by market, Arch has an adequate amount of
spectrum licensed to meet the capacity demands of projected growth for the next
several years.

     Arch is seeking to improve overall network efficiency by deploying paging
terminals, consolidating subscribers on fewer, higher capacity networks and
increasing the transmission speed, or baud rate, of certain of its existing
networks. Arch believes its investments in its network infrastructure will
facilitate and improve the delivery of high quality communications services
while at the same time reducing associated costs of such services.

  Nationwide Wireless Networks

     Arch operates two nationwide 900 MHz networks. As part of its acquisition
of MobileMedia, Arch acquired MobileMedia's fully operational nationwide
wireless "8875" network, which was upgraded in 1996 to incorporate high-speed
FLEX(TM) technology developed by Motorola. In addition, in 1996, MobileMedia
completed the construction of a second nationwide "5375" network that uses
FLEX(TM) technology. The use of FLEX(TM) technology significantly increases
transmission capacity and represents a marked improvement over other systems
that use older paging protocols.

  Narrowband PCS Networks and Licenses

     The Federal Communications Commission has allocated a set of radio
frequencies, called narrowband PCS frequencies, that enable wireless messaging
companies such as PageNet and Arch to offer advanced messaging services and to
make more efficient use of radio spectrum than do traditional paging networks.
Arch has taken the following steps to position itself to ensure it has access to
this valuable radio spectrum.

     Arch's Narrowband Personal Communications Services Licenses.  MobileMedia
purchased five regional licenses through the Federal Communications Commission's
1994 auction of narrowband PCS licenses, providing the equivalent of a
nationwide 50 kHz outbound/12.5 kHz inbound narrowband PCS system. In addition,
MobileMedia acquired a second narrowband PCS license for a nationwide inbound
system. In order to retain these narrowband PCS licenses, Arch must comply with
specified minimum build-out requirements. With respect to each of the regional
narrowband PCS licenses purchased at the Federal Communication Commission's 1994
auction, Arch has built out the related narrowband PCS system to cover 150,000
sq. km. or 37.5% of each of the five regional populations in compliance with the
Federal Communications Commission's applicable build-out requirements. Arch is
still required to build-out this system to cover 300,000 sq. km. or 75% of each
of the five regional populations by April 27, 2005. With respect to the
nationwide narrowband PCS license acquired as part of the MobileMedia
acquisition, Arch built out the related narrowband system to cover 750,000 sq.
km. or 37.5% of the U.S. population by September 29, 1999 in compliance with
applicable Federal Communications Commission build-out requirements. Arch is
still required to extend the build-out of this system to cover 1,500,000 sq. km.
or 75% of the U.S. population by September 29, 2004. In each instance, the
population percentage will be determined by reference to population figures at
the time of the applicable deadline. Arch estimates that the costs of these
minimum build-outs would be approximately $9.0 million; however, Arch may exceed
these minimum build-out requirements in order to be able to provide nationwide
narrowband PCS. If Arch chooses to exceed its minimum narrowband PCS build-out
requirements, Arch estimates that the costs through 2000 will approximate $50
million.

                                       101
<PAGE>   109

     Strategic Alliances.  Arch has entered into strategic alliances which it
believes provide it with an economical means to launch and offer to its
customers advanced messaging services, using its narrowband PCS spectrum by
leveraging its own network with those of its strategic partners while it
assesses the extent it will expand its network. Arch believes that its reseller
agreement with Weblink Wireless, Inc., formerly PageMart Wireless, Inc.,
together with its reseller agreement with PageNet, provides it with access to
additional spectrum to accommodate customer demands for higher volume and
bandwidth. Arch currently estimates that the total amount of future cash
expenditures related to deploying its narrowband PCS spectrum through 2003 with
Weblink and under its reseller agreement with PageNet, including expenditures
for network expansion as well as commitments under its strategic alliances, will
approximate $50 million.

SUBSCRIBERS AND MARKETING

     Arch's wireless messaging accounts are generally businesses with employees
who travel frequently but must be immediately accessible to their offices or
customers. Arch's subscribers include proprietors of small businesses,
professionals, management personnel, field sales personnel and service forces,
members of the construction industry and construction trades, real estate
brokers and developers, medical personnel, sales and service organizations,
specialty trade organizations, manufacturing organizations and governmental
agencies.

     Arch markets its services through three primary sales channels: direct,
reseller and retail.

     Direct.  In the direct channel, Arch leases or sells equipment directly to
its customers and bills and services such customers. Arch markets its services
through a direct marketing and sales organization which operated approximately
375 retail stores as of December 31, 1999. Arch's direct customers range from
individuals and small-and medium-sized businesses to Fortune 500 accounts and
government agencies. Business and government accounts typically experience less
turnover than consumer accounts. The direct channel will continue to have the
highest priority among Arch's marketing and sales efforts, because of its
critical contribution to recurring revenue and projected growth. Arch has been
engaged in efforts to improve sales productivity and strengthen its direct
channel sales force, segments of which had previously suffered from high
turnover and open positions under MobileMedia's ownership and management. In
addition, Arch commenced implementing consumer direct marketing techniques in
1998. As of December 31, 1999, the direct channel accounted for approximately
86.6% of recurring revenue.

     Reseller.  In the reseller channel, Arch sells access to its transmission
networks in bulk to a third party, who then resells such services to consumers
or small businesses or other end users. Arch offers access to its network to
resellers at bulk discounted rates. The third party reseller provides customer
service, is responsible for pager maintenance and repair costs, invoices the end
user and retains the credit risk of the end user, although Arch retains the
credit risk of the reseller. Because resellers are responsible for customer
equipment, the capital costs that would otherwise be borne by Arch are reduced.

     Arch's resellers generally are not exclusive distributors of Arch's
services and often have access to networks of more than one provider.
Competition among service providers to attract and maintain reseller
distribution is based primarily upon price, including the sale of equipment to
resellers at discounted rates. Arch intends to continue to be an active
participant in the reseller channel and to concentrate on accounts that are
profitable and where longer term partnerships can be established with selected
resellers. As of December 31, 1999, the reseller channel accounted for
approximately 8.4% of recurring revenue.

     Retail.  In the retail channel, Arch sells equipment to retailers and,
after the consumer purchases the pager from the retailer, the consumer contacts
Arch to activate service. The retail channel is targeted at the consumer market
and consists primarily of national retail chains. Consumers served by the retail
channel typically purchase, rather than lease, equipment. This reduces Arch's
capital investment requirements. Subscribers obtained through retailers are
billed and serviced directly by Arch. Retail distribution permits Arch to
penetrate the consumer market by supplementing direct sales efforts. As of
December 31, 1999, the retail channel accounted for approximately 5.0% of
recurring revenue.

                                       102
<PAGE>   110

SOURCES OF EQUIPMENT

     Arch does not manufacture any of the messaging equipment or other equipment
used in operations. The equipment used in Arch's paging operations is generally
available for purchase from multiple sources. Arch centralizes price and
quantity negotiations for all of its operating subsidiaries to achieve cost
savings from volume purchases. Arch buys customer equipment primarily from
Motorola, NEC and Panasonic and purchased terminals and transmitters primarily
from Glenayre and Motorola. Motorola has announced its intention to discontinue
manufacturing transmitters and other paging infrastructure during 2000, although
it will continue to maintain and service existing infrastructure into the
future. Arch anticipates that equipment will continue to be available in the
foreseeable future, consistent with normal manufacturing and delivery lead
times.

     Because of the high degree of compatibility among different models of
transmitters, computers and other equipment manufactured by suppliers, Arch is
able to design its systems without being dependent upon any single source of
such equipment. Arch routinely evaluates new developments in technology in
connection with the design and enhancement of its paging systems and selection
of products to be offered to subscribers. Arch believes that its system
equipment is among the most technologically sophisticated in the paging
industry.

COMPETITION

     The wireless messaging industry is highly competitive. Companies in this
industry compete on the basis of price, coverage area offered to subscribers,
available services offered, transmission quality, system reliability and
customer service.

     Arch competes by maintaining competitive pricing of its products and
services, by providing broad coverage options through high-quality, reliable
transmission networks and by furnishing subscribers a superior level of customer
service. Arch, the second largest messaging carrier in the United States, offers
messaging services, consisting primarily of basic paging services but also
including advanced messaging services and enhanced, or complementary, wireless
messaging services such as voice mail and voice mail notifications, news,
sports, weather reports, stock quotes and other information delivery services.
Arch's primary competitors in the traditional messaging market include
Metrocall, Vodafone/AirTouch and Weblink Wireless, all of which are among the
top eight largest paging carriers in the United States and offer highly similar
services. The products and services Arch offers also compete with a broad array
of wireless messaging services provided by cellular and PCS phone companies.
This competition has intensified as prices for these services have declined
rapidly, and these providers have incorporated messaging capability into their
handsets. Even people who recognize the advantages of traditional messaging may
discontinue subscription to these services in favor of subscription to a single
device which incorporates both traditional voice and messaging services. Many of
these companies possess financial, technical and other resources greater than
those of Arch. Such providers currently competing with Arch in one or more
markets include AT&T Wireless, SBC BellSouth, MCI/WorldCom/SkyTel, Sprint PCS,
Vodafone/AirTouch/Bell Atlantic (now called Verizon), Nextel and Motient, Inc.

     Insofar as cellular, PCS and other mobile phone service providers provide
subscribers with both messaging and voice service using the same hand-held
device, services like cellular and PCS are more sophisticated than basic
messaging services and command a greater price. The price of cellular and PCS
and other mobile phone services, however, has fallen dramatically. The decline
in price of these services is reflected in the decline of the average monthly
bill for cellular and PCS services from $43.86 in June 1997 to $41.24 in
December 1999. Moreover, today many cellular and PCS providers offer basic
service packages for approximately $20 per month. By contrast, Arch management
believes that currently the average revenue per unit per month is approximately
$10.00.

     While cellular, PCS and other mobile phone services are more expensive than
traditional messaging services, such mobile telephone service providers
typically provide traditional messaging service as an element of their basic
service package without additional charges. Subscribers that purchase these
combined services no longer need to subscribe to a separate messaging service as
well. As a result, a large
                                       103
<PAGE>   111

number of traditional messaging customers can readily switch from messaging to
cellular, PCS and other mobile telephone services. The dramatic decrease in
prices for cellular, PCS and other mobile telephone services has led many
customers to select combined voice and messaging services as an alternative to
stand alone messaging services. Indeed, survey data indicates that roughly 20
percent of paging customers that drop their service do so in favor of cellular,
PCS and other mobile phone services. PageNet and Arch are sensitive to these
technological and availability changes and are working to design competitively
attractive values for the customer even in the midst of these changes by
cellular, PCS and other mobile phone service providers.

EMPLOYEES

     At June 30, 2000, Arch employed approximately 4,900 persons. None of Arch's
employees is represented by a labor union. Arch believes that its employee
relations are good.

TRADEMARKS

     In May 1997, Arch established a single national identity, Arch Paging, for
its paging services which previously had been marketed under various trademarks.
In addition, Arch adopted a new corporate logo, developed a corporate-wide
positioning strategy tied to customer service delivery, and launched its
Internet Web site at www.arch.com. At present, Arch has continued to market to
former MobileMedia customers under the MobileComm and MobileMedia brand names,
but is working to transition its marketing under the Arch name.

     Arch owns the service marks "Arch," "Arch Paging" and "Arch
Communications", and holds federal registrations for the service marks
"MobileComm" and "MobileMedia" as well as various other trademarks.

PROPERTIES

     At June 30, 2000, Arch owned 10 office buildings and leased office space,
including its executive offices, in approximately 375 locations in 42 states for
use in its paging operations. Arch leases transmitter sites and/or owns
transmitters on commercial broadcast towers, buildings and other fixed
structures in approximately 4,800 locations in all 50 states, the U.S. Virgin
Islands and Puerto Rico. Arch's leases are for various terms and provide for
monthly lease payments at various rates. Arch believes that it will be able to
obtain additional space as needed at acceptable cost. Substantially all of
Arch's and MobileMedia's tower sites were sold during 1998 and 1999 and Arch
currently rents transmitter space.

LITIGATION

     Arch, from time to time, is involved in lawsuits arising in the normal
course of business. Arch believes that its currently pending lawsuits will not
have a material adverse effect on its financial condition or results of
operations.

THE COMPANY

     A predecessor to Arch, also named Arch Communications Group, Inc., was
incorporated in January 1986 in Delaware and conducted its operations through
wholly owned direct and indirect subsidiaries. On September 7, 1995, this
predecessor completed its acquisition of USA Mobile Communications Holdings,
Inc. through the merger of the predecessor with and into USA Mobile, which
simultaneously changed its name to Arch Communications Group, Inc. and continued
in existence as a Delaware corporation. See Note 2 to Arch's consolidated
financial statements. On June 3, 1999, Arch acquired the business of
MobileMedia, which was then operating as a debtor-in-possession under chapter 11
of the Bankruptcy Code.

                                       104
<PAGE>   112

                               ARCH'S MANAGEMENT

DIRECTORS AND EXECUTIVE OFFICERS

     The directors and executive officers of Arch are:

<TABLE>
<CAPTION>
NAME                                   AGE                           POSITION
----                                   ---                           --------
<S>                                    <C>    <C>
C. Edward Baker, Jr..................  50     Chairman of the Board, Chief Executive Officer and
                                              Director
Lyndon R. Daniels....................  47     President and Chief Operating Officer
John B. Saynor.......................  59     Executive Vice President and Director
J. Roy Pottle........................  41     Executive Vice President and Chief Financial Officer
Paul H. Kuzia........................  58     Executive Vice President/Technology and Regulatory
                                              Affairs
Edwin M. Banks(2)....................  38     Director
R. Schorr Berman(2)..................  52     Director
James S. Hughes(1)...................  57     Director
John Kornreich.......................  54     Director
H. Sean Mathis(1)....................  53     Director
Allan L. Rayfield(2).................  65     Director
John A. Shane(1).....................  67     Director
</TABLE>

---------------
(1) Member of the audit committee

(2) Member of the executive compensation and stock option committee

     C. EDWARD BAKER, JR. has served as Chief Executive Officer and a director
of Arch since 1988. Mr. Baker became Chairman of the Board of Arch in 1989. He
also served as President of Arch from April 1988 to January 1998. From 1986
until joining Arch in March 1988, Mr. Baker was President and Chief Executive
Officer of US West Paging.

     LYNDON R. DANIELS joined Arch in January 1998 as President and Chief
Operating Officer. From November 1993 to January 1998, Mr. Daniels was the
President and Chief Executive Officer of Pacific Bell Mobile Services, a
subsidiary of SBC Communications Inc. From May 1988 until November 1993, Mr.
Daniels was the Chief Financial Officer of Pactel Corp., a mobile telephone
company.

     JOHN B. SAYNOR has served as a director of Arch since 1986. Mr. Saynor has
served as Executive Vice President of Arch since 1990. Mr. Saynor is a founder
of Arch and served as President and Chief Executive Officer of Arch from 1986 to
March 1988 and as Chairman of the Board from 1986 until May 1989.

     J. ROY POTTLE joined Arch in February 1998 as Executive Vice President and
Chief Financial Officer. From October 1994 to February 1998, Mr. Pottle was Vice
President/Treasurer of Jones Intercable, Inc., a cable television operator. From
September 1989 to October 1994, he served as Vice President and Relationship
Manager at The Bank of Nova Scotia, New York Agency.

     PAUL H. KUZIA has served as Executive Vice President/Technology and
Regulatory Affairs of Arch since September 1996. He served as Vice
President/Engineering and Regulatory Affairs of Arch from 1988 to September
1996. Prior to 1988, Mr. Kuzia was director of operations at Message Center Inc.

     EDWIN M. BANKS has been a director of Arch since June 1999. He has been
employed by W.R. Huff Asset Management since 1988 and currently serves as a
portfolio manager. From 1985 until he joined W.R. Huff, Mr. Banks was employed
by Merrill Lynch & Company. Mr. Banks also serves as a director of Magellan
Health Services, formerly Charter Medical Corporation, and e.spire Corporation,
formerly American Communications Services, Inc.

     R. SCHORR BERMAN has been a director of Arch since 1986. Since 1987, he has
been the President and Chief Executive Officer of MDT Advisers, Inc., an
investment adviser. He is a director of Mercury Computer Systems, Inc. as well
as a number of private companies.

                                       105
<PAGE>   113

     JAMES S. HUGHES has been a director of Arch since 1986. Since 1987, he has
been President and Chief Executive Officer of Norwich Corporation, a real estate
investment and service firm, and, since 1992, he has served as President and
Managing Director of Inventa Corporation, an international business development
firm.

     JOHN KORNREICH has been a director of Arch since June 1998. Mr. Kornreich
has served as a Managing Director of Sandler Capital Management Co., Inc. since
1988.

     H. SEAN MATHIS has been a director of Arch since June 1999. He also has
been the President of Litchfield Asset Holdings, an investment advisory company,
since 1999. He was also the Chairman of the Board and Chief Executive Officer of
Allis Chalmers, Inc. from January 1996 to 1999 and previously served as a Vice
President of that company since 1989. From July 1996 to September 1997, Mr.
Mathis was Chairman of the Board of Universal Gym Equipment Inc., a privately
owned company which filed for protection under the Bankruptcy Code in July 1997.
From 1991 to 1993, Mr. Mathis was President of RCL Acquisition Corp., and from
1993 to 1995 he was President and a director of RCL Capital Corporation, which
was merged into DISC Graphics in November 1995. Previously, Mr. Mathis was a
director and Chief Operating Officer of Ameriscribe Corporation. Mr. Mathis is a
director of Kasper A.S.L. Ltd. and Thousand Trails, Inc.

     ALLAN L. RAYFIELD has been a director of Arch since 1997. He has been a
consultant with the Executive Service Corps, a non-profit organization that
provides consulting services to non-profit organizations, since 1995. From
November 1993 until December 1994, Mr. Rayfield served as Chief Executive
Officer of M/A Com Inc., a microwave electrical manufacturing company. From
April 1991 until November 1993, he served as Chief Operating Officer of M/A Com
Inc. He is a director of Parker Hannifin Corporation and Acme Metals
Incorporated.

     JOHN A. SHANE has been a director of Arch since 1988. He has been the
President of Palmer Service Corporation since 1972. He was a general partner of
Palmer Partners L.P., a venture capital firm, from 1981 to 1999. He serves as a
director of Overland Data, Inc., United Asset Management Corporation and Gensym
Corporation and as a trustee of Nvest Funds.

     Arch's certificate of incorporation and by-laws provide that Arch has a
classified board of directors composed of three classes, each of which serves
for three years, with one class being elected each year. The term of Messrs.
Baker, Berman and Kornreich will expire at Arch's annual meeting of stockholders
to be held in 2001. The term of Messrs. Hughes, Rayfield and Banks will expire
at Arch's annual meeting of stockholders to be held in 2002. The term of Messrs.
Saynor, Shane and Mathis will expire at Arch's annual meeting of stockholders to
be held in 2003.

     Two of Arch's stockholders, W.R. Huff Asset Management and Whippoorwill
Associates, Inc., have the right to designate one member each for election to
Arch's board of directors. This right of designation will continue through 2002
for W.R. Huff and 2003 for Whippoorwill if the designating stockholder is still
entitled to cast at least 5% of all votes at an Arch stockholders' meeting, and
will continue afterwards if the designating stockholder is still entitled to
cast at least 10% of all such votes. Under this arrangement, Mr. Banks has been
designed by W.R. Huff and Mr. Mathis has been designed by Whippoorwill.

     The holders of Series C preferred stock have the right, voting as a
separate class, to elect one member of Arch's board of directors, and such
director has the right to be a member of any committee of the board. Mr.
Kornreich is currently the director elected by the holders of Series C preferred
stock. This right of designation will terminate if less than 50% of the Series C
preferred stock remains outstanding.

     Arch's officers are elected by the board of directors and hold office until
their successors are elected or until their earlier death, resignation or
removal.

     Most of Arch's executive officers have entered into non-competition
agreements with Arch which provide that they will not compete with Arch for one
year following termination, or recruit or hire any other Arch employee for three
years following termination. See "Executive Compensation -- Executive Retention
Agreements."

                                       106
<PAGE>   114

     For a discussion of the expected changes in management as a result of the
merger, see "The Combined Company -- Management."

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     Arch and three other entities have co-founded an offshore corporation to
pursue wireless messaging opportunities in Latin America. Arch and Mr. Hughes
each contributed $250,000 to this offshore corporation. Arch and Mr. Hughes made
subsequent investments of $200,000 and $50,000, respectively, in the offshore
corporation in 1999. Arch and Mr. Hughes currently own 15.4% and 12.4%,
respectively, of the offshore corporation. Arch plans to maintain narrowband PCS
licenses obtained by the offshore corporation in Chile, Argentina and Peru. The
investment required to maintain these licenses is estimated at $30,000. Arch and
other stockholders of the offshore corporation, including Mr. Hughes, are
expected to make additional investments to fund the costs to maintain the
licenses.

     Arch's has made several loans to Mr. Baker. The loans bear interest at
5%-9 1/2% annually. As of June 30, 2000, principal and accrued interest of
$392,000 was outstanding.

BOARD COMMITTEES

     Arch's board of directors has an audit committee and an executive
compensation and stock option committee. The audit committee reviews the annual
consolidated financial statements of Arch and its subsidiaries before their
submission to Arch's board of directors and consults with Arch's independent
public accountants to review financial results, internal financial controls and
procedures, audit plans and recommendations. The audit committee also recommends
the selection, retention or termination of independent public accountants and
approves services provided by independent public accountants prior to the
provision of such services. The compensation committee recommends to Arch's
board the compensation of executive officers, key managers and directors and
administers Arch's stock option plans. Arch's board of directors has no standing
nominating committee.

INDEMNIFICATION AND DIRECTOR LIABILITY

     Arch's certificate of incorporation eliminates the liability of its
directors for monetary damages for breaches of fiduciary duties, for
circumstances involving wrongful acts, such as the breach of a director's duty
of loyalty or acts or omissions that involve intentional misconduct or a knowing
violation of law. The certificate of incorporation also requires Arch to
indemnify its directors and officers to the fullest extent permitted by the
Delaware corporations statute.

DIRECTOR COMPENSATION

  FEES AND EXPENSES

     Arch pays its non-employee, or "outside," directors an annual fee of
$12,000, an additional annual fee of $1,000 for serving as chairs of board
committees, $2,000 for each meeting of the board of directors attended and $750
for each board committee meeting attended. Arch also reimburses all directors
for customary and reasonable expenses incurred in attending board and board
committee meetings.

     Under a deferred compensation plan for Arch's outside directors, each
outside director has the right to make an election to defer his compensation as
an outside director and to receive the deferred amounts in cash on a specific
calendar date or a date on which a certain event occurs, such as the date he
ceases to be an outside director. All deferred compensation is credited, as of
the date on which such compensation would have been paid, at the participant's
election in either cash or shares of Arch common stock based on the market price
of such shares as of the date such compensation would have been paid. On the
distribution date, any deferred compensation credited in shares of common stock
is converted into cash by valuing each stock unit at the market price of a share
of common stock on the distribution date. Mr. Rayfield and Mr. Banks are the
only outside directors who have elected to participate in this plan. Mr.
Rayfield elected to defer all of his 1999 and 2000 director compensation, of
which 50% will be

                                       107
<PAGE>   115

credited in cash and 50% will be credited in shares of common stock of Arch,
until the date he ceases to be a director of the company. Mr. Banks elected to
defer all of his 1999 and 2000 director compensation of which 100% will be
credited in shares of Arch common stock, until the date he ceases to be a
director of the company.

OUTSIDE DIRECTORS' STOCK OPTION PLANS

     Outside Directors' Stock Option Plan.  A total of 196,733 shares of common
stock may be issued upon the exercise of options granted under Arch's outside
directors' stock option plan. Only directors of Arch who are not employees of
Arch are eligible to receive options under the outside directors' option plan.
Options granted under the outside directors' option plan do not qualify as
incentive stock options under Section 422 of the Internal Revenue Code. Under
the outside directors' option plan, outside directors receive annual grants on
the annual meeting date of options to purchase 3,000 shares of common stock. In
addition, newly elected or appointed outside directors receive options to
purchase 3,000 shares of common stock as of the date of their initial
appointment or election. All options have an exercise price equal to the fair
market value of the common stock on the date of grant.

     Currently, each option under the outside directors' option plan becomes
exercisable with respect to 100% of the shares subject to the option on the date
of grant, subject to Arch's repurchase option which would allow Arch to
repurchase, at its option up to 75% of the total number of shares subject to
such option on the date of grant less 25% on each of the first three
anniversaries of the date of grant. In general, an optionee may exercise his or
her option only while he or she is a director of Arch and for 90 days after he
or she ceases to be a director of the company, or one year after death or
permanent disability. In addition, options expire immediately if a director is
terminated for cause. Unexercised options expire ten years after the date of
grant. Options are not transferable or assignable other than upon the death of
the optionee or pursuant to a qualified domestic relations order.

     An optionee's options become fully vested upon his or her death and all
options become fully vested in the event of a change in control of Arch.
Pursuant to the terms of the outside directors' option plan, all options
outstanding on May 16, 1995, covering a total of 2,406 shares of common stock
exercisable at $37.41 per share and none of which was held by Arch's current
directors, became fully exercisable and vested as a result of Arch's purchase of
approximately 37% of USA Mobile in the first step of Arch's acquisition of USA
Mobile.

     As of June 30, 2000, options to purchase an aggregate of 48,000 shares of
common stock were outstanding and 2,406 options had been exercised under the
outside directors' option plan.

     Prior Outside Directors' Stock Option Plan.  Under a prior outside
directors' stock option plan; Messrs. Berman, Hughes and Shane each received an
option to purchase 1,667 shares of common stock at an exercise price equal to
the fair market value of the common stock on January 30, 1995 ($55.50 per
share). Each option under the plan becomes exercisable at the rate of 20% of the
shares subject to the option on the first anniversary of the date of grant and
5% of the shares subject to the option per calendar quarter thereafter. In the
event of a change in control of Arch, all outstanding options will become fully
exercisable and vested. In general, an optionee may exercise his option, to the
extent vested, only while he is a director of Arch and for one year after he
ceases to be a director of Arch. Unexercised options expire ten years after the
date of grant. Options are not transferable or assignable other than upon the
death of the optionee or pursuant to a qualified domestic relations order. The
plan was terminated on September 7, 1995, but outstanding options continue to
vest on the same terms as in effect prior to termination. As of June 30, 2000,
options to purchase an aggregate of 5,001 shares of common stock were
outstanding and no options had been exercised under the plan.

                                       108
<PAGE>   116

SUMMARY COMPENSATION TABLE

     The annual and long-term compensation of Arch's Chief Executive Officer and
other executive officers named below was as follows for the years ended December
31, 1997, 1998 and 1999:

                           SUMMARY COMPENSATION TABLE

<TABLE>
<CAPTION>
                                                             ANNUAL COMPENSATION
                                                      ----------------------------------      LONG-TERM
                                                                            OTHER ANNUAL     COMPENSATION
                                                                  BONUS     COMPENSATION    --------------
NAME AND PRINCIPAL POSITION DURING 1999        YEAR   SALARY $     $(1)        ($)(2)       OPTIONS (#)(3)
---------------------------------------        ----   --------   --------   ------------    --------------
<S>                                            <C>    <C>        <C>        <C>             <C>
C. Edward Baker, Jr..........................  1999   $434,337   $185,000     $  4,163         150,000
  Chairman, President and Chief Executive      1998    373,742    135,000          600         151,554(4)
  Officer                                      1997    353,317    227,500          600          16,545
Lyndon R. Daniels............................  1999    313,735    203,000       23,363(5)       91,667
  President and Chief Operating Officer        1998    295,416         --      113,905(5)       46,666
  (joined Arch in January 1998)
J. Roy Pottle................................  1999    228,896    140,000        2,317          66,666
  Executive Vice President and Chief           1998    179,200         --       99,304(5)       30,000
  Financial Officer (joined Arch in February
  1998)
John B. Saynor...............................  1999    161,667     44,092        1,490          20,000
  Executive Vice President                     1998    157,646     41,770          600          17,247(6)
                                               1997    153,188     72,900          600           5,302
Paul H. Kuzia................................  1999    190,163     64,480        3,373          41,666
  Executive Vice President/Technology          1998    165,489     58,435          600          29,616(7)
  and Regulatory Affairs                       1997    157,633     77,400          600           5,629
</TABLE>

---------------
(1) Represents bonus paid in such fiscal year with respect to prior year.

(2) Represents Arch's matching contributions paid under Arch's 401(k) plan.

(3) No restricted stock awards or SARs were granted to any of the named
    executive officers during the years ended December 31, 1997, 1998 or 1999.

(4) Includes options to purchase 136,563 shares granted as part of Arch's
    January 16, 1998 option repricing program.

(5) Represents reimbursement for certain relocation costs and associated taxes.

(6) Includes options to purchase 11,968 shares granted as part of Arch's January
    16, 1998 option repricing program.

(7) Includes options to purchase 23,229 shares granted as part of Arch's January
    16, 1998 option repricing program.

EXECUTIVE RETENTION AGREEMENTS

     Arch is a party to executive retention agreements with a total of 17
executives, including Messrs. Baker, Daniels, Kuzia, Pottle and Saynor.
Following the merger, the PageNet change of control severance plan will provide
similar severance arrangements for PageNet executives. See "PageNet's
Management."

     The purpose of the executive retention agreements is to assure the
continued employment and dedication of the executives without distraction from
the possibility of a change in control of Arch as defined in the executive
retention agreements. The executive will be eligible to receive benefits if a
change in control occurs, and Arch terminates the executive's employment at any
time within the following 12 months except for cause, disability or death, or
the executive terminates employment for good reason,

                                       109
<PAGE>   117

as defined in the executive retention agreements. Such benefits will include (1)
a lump sum cash severance payment equal to a specified multiple of the
executive's annual base salary in effect at the time of the change in control
plus a specified multiple of the executive's average annual bonus paid during
the previous three full calendar years, (2) payment of any accrued but unpaid
base salary plus any other amounts earned but unpaid through the date of
termination and (3) any amounts or benefits required to be paid or provided to
the executive or which the executive is eligible to receive following the
executive's termination under any plan, program, policy, practice, contract or
agreement of Arch. In addition, for up to 12 months after termination, Arch must
provide the executive with life, disability, accident and health insurance
benefits similar to those previously maintained until the executive becomes
reemployed with another employer and is eligible to receive substantially
equivalent benefits. The specified multiple of salary and bonus for Messrs.
Baker, Daniels, Kuzia, Pottle and Saynor is three, and the specified multiple
for the other executives is one or two. Good reason is defined to include, among
other things, a material reduction in employment responsibilities, compensation
or benefits. In the case of Mr. Baker, good reason includes his not becoming the
chief executive officer of any entity succeeding or controlling Arch.

STOCK OPTION GRANTS

     The following options were granted to the five executive officers named in
the summary compensation table during 1999.

                       OPTION GRANTS IN LAST FISCAL YEAR

<TABLE>
<CAPTION>
                                           INDIVIDUAL GRANTS
                        -------------------------------------------------------     POTENTIAL REALIZABLE
                                        PERCENT OF                                    VALUE AT ASSUMED
                                          TOTAL                                        ANNUAL RATES OF
                                       OPTIONS/SARS                               STOCK PRICE APPRECIATION
                        OPTIONS/SARS    GRANTED TO    EXERCISE OR                    FOR OPTIONS TERM(3)
                          GRANTED      EMPLOYEE IN     BASE PRICE    EXPIRATION   -------------------------
                           (#)(1)      FISCAL YEAR    ($/SHARE)(2)      DATE        5% ($)       10% ($)
                        ------------   ------------   ------------   ----------   ----------   ------------
<S>                     <C>            <C>            <C>            <C>          <C>          <C>
C. Edward Baker,
  Jr. ................    150,000         11.64%        $7.8282       06/03/09     $738,467     $1,871,420
Lyndon R. Daniels.....     91,667          7.11          7.8282       06/03/09      451,287      1,143,650
J. Roy Pottle.........     66,666          5.17          7.8282       06/03/09      328,204        831,734
John B. Saynor........     20,000          1.55          7.8282       06/03/09       98,462        249,523
Paul H. Kuzia.........     41,666          3.23          7.8282       06/03/09      205,126        519,831
</TABLE>

---------------
(1) Options generally become exercisable at a rate of 20% of the shares subject
    to the option on each of the first five anniversaries of the date of grant.

(2) The exercise price is equal to the fair market value of common stock on the
    date of grant.

(3) Amounts represent hypothetical gains that could be achieved for the options
    if exercised at the end of the option terms. These gains are based on
    assumed rates of stock appreciation of 5% and 10% compounded annually from
    the date the options were granted and are not intended to forecast future
    appreciation of the price of the common stock. The named executive officers
    will realize gain upon the exercise of these options only if there is an
    increase in the price of common stock which benefits all Arch stockholders
    proportionately.

     During 2000, Arch has granted additional options, exercisable at $6.06 per
share, to Messrs. Baker (709,000), Daniels (481,000), Pottle (350,000), Saynor
(100,000) and Kuzia (263,000).

                                       110
<PAGE>   118

OPTION EXERCISES AND YEAR-END OPTION TABLE

     The named executive officers did not exercise any stock options during
1999. They held the following stock options as of December 31, 1999:

              AGGREGATED OPTIONS/SAR EXERCISES IN LAST FISCAL YEAR
                       AND FISCAL YEAR-END OPTIONS VALUES

<TABLE>
<CAPTION>
                                                              NUMBER OF SECURITIES   VALUE OF UNEXERCISED
                                                               UNDERLYING OPTIONS    IN-THE-MONEY OPTIONS
                                       SHARES                  AT FISCAL YEAR-END     AT FISCAL YEAR-END
                                     ACQUIRED ON    VALUE        (EXERCISABLE/           (EXERCISABLE/
                                      EXERCISE     REALIZED      UNEXERCISABLE)         UNEXERCISABLE)
NAME                                     (#)         ($)              (#)                   ($)(1)
----                                 -----------   --------   --------------------   ---------------------
<S>                                  <C>           <C>        <C>        <C>         <C>         <C>
C. Edward Baker, Jr. ..............        --            --    72,959     228,595          --          --
Lyndon R. Daniels..................        --            --    16,335     121,998          --          --
John B. Saynor.....................        --            --     6,706      30,541          --          --
J. Roy Pottle......................        --            --    10,500      86,166          --          --
Paul H. Kuzia......................        --            --    14,371      56,911          --          --
</TABLE>

---------------
(1) Based on the fair market value of common stock on December 31, 1999 ($6.5938
    per share) less the option exercise price.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

     The current members of Arch's compensation committee are R. Schorr Berman,
Allan L. Rayfield and Edwin M. Banks. Messrs. Berman and Rayfield served on the
compensation committee throughout 1999, and Mr. Banks joined the compensation
committee in August 1999.

     C. Edward Baker, Jr., the chairman and chief executive officer of Arch,
makes recommendations and participates in discussions regarding executive
compensation, but he does not participate directly in discussions regarding his
own compensation. No current executive officer of Arch has served as a director
or member of the compensation committee (or other committee serving an
equivalent function) of any other entity that has an executive officer who
serves as a director of Arch or as a member of the compensation committee of
Arch.

                                       111
<PAGE>   119

                         ARCH'S PRINCIPAL STOCKHOLDERS

     The following table sets forth certain information about the beneficial
ownership of Arch's common stock by

     - each person who is known by Arch to beneficially own more than 5% of its
       outstanding shares of common stock;

     - each current director of Arch;

     - Arch's chief executive officer and the other named executive officers;
       and

     - all current directors and executive officers of Arch as a group.

     The table provides information at August 11, 2000 and as adjusted to give
effect to the exchange offer, the PageNet merger and related transactions,
assuming that all of the outstanding discount notes are tendered.

     Beneficial ownership is determined in accordance with the rules of the SEC
based upon voting or investment power over the securities. The number of shares
of common stock outstanding that is used in calculating the percentage for each
listed person includes any shares that person has the right to acquire through
exercise of warrants or options within 60 days after August 11, 2000. These
shares, however, are not deemed to be outstanding for the purpose of calculating
the percentage beneficially owned by any other person.

     Unless otherwise indicated, each person or entity listed in the table has
sole voting power and investment power, or shares such power with his spouse,
with respect to all shares of capital stock listed as owned by such person or
entity. The inclusion of shares in the table does not constitute an admission
that the named stockholder is a direct or indirect beneficial owner of the
shares.

     The table assumes

     - the conversion of Series D preferred stock into common stock at the
       current conversion ratio of 6.61318 to 1.00;

     - the conversion of Series C preferred stock into common stock at the
       current conversion ratio of 7.1576 to 1.00; and

     - the conversion of Class B common stock into common stock at a one-for-one
conversion ratio.

                                       112
<PAGE>   120

     Because Class B common stock is not entitled to vote in the election of
directors, the voting power of its holders is less than their percentages of
beneficial ownership shown in the table. Thus, the Class B stockholders
identified in notes (7) and (8) to the table would be entitled to cast a maximum
of 15.2% of the votes in the election of directors, assuming that they -- and
only they -- exercised outstanding options and warrants. This contrasts with the
more than 17.7% of beneficial ownership which is obtained by adding their
individual beneficial ownership percentages in the table.

<TABLE>
<CAPTION>
                                                             SHARES
                                                           UNDERLYING
                                                          OPTIONS AND
                                                            WARRANTS                           PERCENTAGE
                                             SHARES       EXERCISABLE                   ------------------------
                                         OUTSTANDING AT     PRIOR TO        TOTAL           AT
                                           AUGUST 11,     OCTOBER 10,    BENEFICIALLY   AUGUST 11,       AS
NAME                                          2000            2000          OWNED          2000      ADJUSTED(1)
----                                     --------------   ------------   ------------   ----------   -----------
<S>                                      <C>              <C>            <C>            <C>          <C>
C. Edward Baker, Jr. ..................        37,434        190,393         227,827       *            *
Lyndon R. Daniels......................            --         44,002          44,002       *            *
John B. Saynor.........................        64,642        125,022         189,664       *            *
J. Roy Pottle..........................            --         28,334          28,334       *            *
Paul H. Kuzia..........................           440         29,426          29,866       *            *
R. Schorr Berman(2)....................       655,671      1,143,948       1,799,619        2.4%         1.0%
James S. Hughes........................        40,196         80,142         120,338       *            *
John Kornreich(3)......................     1,843,666      2,888,323       4,731,989        6.1%         2.5%
Allan L. Rayfield......................           334          7,576           7,910       *            *
John A. Shane(4).......................         6,856         21,519          28,375       *            *
Edwin M. Banks(5)......................     8,345,429        572,002       8,917,431       11.9%         4.9%
H. Sean Mathis.........................            --          4,000           4,000       *            *
Sandler Capital Management(6)..........     1,762,438      2,745.444       4,507,882        5.8%         2.4%
W.R. Huff Asset Management Co.,
  L.L.C.(7)............................     8,345,429        568,002       8,913,431       11.9%         4.9%
Whippoorwill Associates, Inc.(8).......     3,939,048        439,904       4,378,952        5.8%         2.4%
Funds affiliated with Resurgence Asset
  Management(9)........................    15,963,776             --      15,963,776       21.4%         8.7%
Paul Tudor Jones II(10)................     4,136,799        126,716       4,262,975        5.7%         2.3%
Citigroup Inc.(11).....................     6,097,031             --       6,097,031        8.2%         3.3%
Bay Harbour Management, L.C............     4,405,201             --       4,405,201        5.9%         2.4%
State of Wisconsin Investment Board....       602,776      3,125,556       3,728,332        4.8%         2.0%
All current directors and executive
  officers of Arch as a group (12
  persons).............................    10,995,548      5,134,687      16,130,235       20.3%         8.6%
</TABLE>

---------------
  *  Less than 1%

 (1) None of these stockholders is expected to receive any shares of Arch common
     stock as a result of ownership of Arch discount notes, PageNet common stock
     or PageNet senior subordinated notes, to the extent Arch is aware of that
     ownership.

 (2) Includes 649,337 shares and 1,122,334 shares issuable upon exercise of
     warrants held by Memorial Drive Trust, over which Mr. Berman may be deemed
     to share voting and investment power as administrator and chief executive
     officer of Memorial Drive Trust. Mr. Berman disclaims beneficial ownership
     of such shares held by Memorial Drive Trust.

 (3) Includes 1,762,438 shares and 2,745,444 shares issuable upon exercise of
     warrants beneficially owned by Sandler Capital Management, over which Mr.
     Kornreich may be deemed to have voting and investment power as managing
     director, and 63,334 shares beneficially owned by two limited partnerships,
     over which Mr. Kornreich may be deemed to have voting and investment power
     as a general partner. Mr. Kornreich disclaims beneficial ownership of all
     such shares.

                                       113
<PAGE>   121

 (4) Includes 351 shares and 606 shares issuable upon exercise of warrants owned
     by Palmer Service Corporation, over which Mr. Shane may be deemed to have
     voting and investment power as president and sole stockholder of Palmer
     Service Corporation, 159 shares issuable upon conversion of $8,000
     principal amount of Arch's 6 3/4% convertible subordinated debentures due
     2003 held by Palmer Service Corporation, and 418 shares issuable upon
     conversion of Arch's 6 3/4% convertible subordinated debentures held by Mr.
     Shane.

 (5) Includes 7,548,218 shares and 568,002 shares issuable upon exercise of
     warrants W.R. Huff manages on behalf of various discretionary accounts and
     1,306,134 shares held by The Huff Alternative Income Fund, L.P., an
     affiliate of W.R. Huff. Mr. Banks is a portfolio manager of W.R. Huff. Mr.
     Banks disclaims beneficial ownership of all such shares.

 (6) Sandler has sole voting and investment power over 112,500 of such shares
     and 194,450 of the shares issuable upon exercise of warrants and shared
     voting and investment power over the remaining shares and warrants. As
     managing director of Sandler, John Kornreich may be deemed to have voting
     and investment power of all such shares.

 (7) Includes 7,548,218 shares and 568,002 shares issuable upon exercise of
     warrants W.R. Huff manages on behalf of various discretionary accounts and
     1,306,139 shares held by The Huff Alternative Income Fund, L.P., an
     affiliate of W.R. Huff. W.R. Huff disclaims beneficial ownership of these
     shares.

 (8) All of such shares are owned by various limited partnerships, a limited
     liability company, a trust and third party accounts for which Whippoorwill
     Associates, Inc. has discretionary authority and acts as general partner or
     investment manager. This information is based on Amendment No. 2 to
     Schedule 13D filed by Whippoorwill Associates, Inc. on February 29, 2000
     and the Form 4 filed by Whippoorwill Associates, Inc. on March 10, 2000
     with the Securities and Exchange Commission.

 (9) Includes 6,928,466 shares beneficially owned by various funds for which
     Resurgence Asset Management, L.L.C. acts as investment manager and/or
     general partner, 3,997,554 shares beneficially owned by various funds for
     which Resurgence Asset Management International L.L.C. acts as investment
     manager and/or general partner, 4,127,398 shares beneficially owned by
     various funds for which Re/Enterprise Asset Management, L.L.C. acts as
     investment manager and/or general partner, 92,648 shares held by Kingstreet
     Ltd., 241,915 shares held by Resurgence Parallel Fund, Inc., 35,560 shares
     held by M.D. Sass Associates, Inc. Employees Profit Sharing Plan, 241,317
     shares held by James B. Rubin, 154,972 shares held by Devonshire Capital
     Partners, L.L.C., 127,041 shares held by J.B. Rubin & Company Profit
     Sharing Plan, 6,992 shares held by Guadalupe G. Rubin IRA, 8,458 shares
     held by James B. Rubin, IRA and 895 shares held by Resurgence Asset
     Management L.L.C. Employee Retirement Plan. Resurgence Asset Management,
     L.L.C., Resurgence Asset Management International L.L.C. and Re/Enterprise
     Asset Management, L.L.C., may be deemed to beneficially own the shares held
     by the funds for which each acts as investment manager and/or general
     partner and each disclaims beneficial ownership of such shares. James B.
     Rubin serves as chief investment officer and is responsible for the day-to
     day investment activities of each of Resurgence Asset Management, L.L.C.,
     Resurgence Asset Management International, L.L.C. and Re/Enterprise Asset
     Management, L.L.C. This information is based on shares issued pursuant to
     the transaction described under "Arch Management's Discussion and Analysis
     of Financial Condition and Results of Operation -- Liquidity and Capital
     Resources," and Amendment No. 1 to Schedule 13G filed by the funds
     affiliated with Resurgence Asset Management with the Securities and
     Exchange Commission on February 15, 2000.

(10) Includes 960,139 shares and 33,417 shares issuable upon exercise of
     warrants held by Tudor BVI Futures, Ltd., 2,745,589 shares and 76,397
     shares issuable upon exercise of warrants held by The Raptor Global
     Portfolio Ltd., 10,650 shares held by The Alter Rock Fund, L.P., 204,346
     shares and 8,181 shares issuable upon exercise of warrants held by The
     Upper Mill Capital Appreciation Fund Ltd. and 216,075 shares and 8,181
     shares issuable upon exercise of warrants held by Tudor Proprietary
     Trading, L.L.C. Tudor Investment Corporation may be deemed to beneficially
     own the
                                       114
<PAGE>   122

     shares held by Tudor BVI Futures, Ltd., The Raptor Global Portfolio Ltd.,
     The Alter Rock Fund, Ltd. and The Upper Mill Capital Appreciation Fund Ltd.
     because Tudor Investment Corporation is the sole general partner of The
     Alter Rock Fund L.P. and provides investment advisory services to The
     Raptor Global Portfolio Ltd., Tudor BVI Futures, Ltd. and The Upper Mill
     Capital Appreciation Fund Ltd. Mr. Jones may be deemed to beneficially own
     the shares held by Tudor Investment Corporation and Tudor Proprietary
     Trading, L.L.C. because he is the indirect controlling equity holder of
     Tudor Proprietary Trading, L.L.C. and the controlling stockholder of Tudor
     Investment Corporation. This information is based on Amendment No. 1 to
     Schedule 13G filed by Paul Tudor Jones, II and Tudor Investment Corporation
     with the Securities and Exchange Commission on February 14, 2000.

(11) Includes 3,144,828 shares held by SSB Citi Fund Management LLC and
     2,891,513 held by Salomon Smith Barney Inc. Citigroup Inc. may be deemed to
     beneficially own all of these shares because Citigroup is the sole
     stockholder of Salomon Smith Barney Holdings, Inc. Salomon Smith Barney
     Holdings, Inc. is the sole stockholder of each of SSB Citi Fund Management
     LLC and Salomon Brothers Holding Company Inc. Salomon Brothers Holding
     Company Inc. is the sole stockholder of Salomon Smith Barney Inc. Citigroup
     Inc. and Salomon Smith Barney Holdings Inc. each disclaim beneficial
     ownership of all of these shares. This information is based on Amendment
     No. 1 to Schedule 13G filed by Citigroup Inc. with the Securities and
     Exchange Commission on February 8, 2000.

Each person or entity listed in the table has an address c/o Arch except for:

     - Sandler Capital Management, 767 Fifth Avenue, 45th Floor, New York, New
       York 10153

     - W.R. Huff Asset Management Co., L.L.C. 67 Park Place, Ninth Floor,
       Morristown, NJ 07960

     - Paul Tudor Jones II, c/o Tudor Investment Corporation, 600 Steamboat
       Road, Greenwich, CT 06830

     - Whippoorwill Associates, Inc. 11 Martine Avenue, White Plains, New York
       10606

     - Resurgence Asset Management L.L.C., 10 New King Street, 1st Floor, White
       Plains, New York 10604

     - Citigroup Inc., 153 East 53rd Street, New York, New York 10043

     - State of Wisconsin Investment Board, P.O. Box 7842, Madison, Wisconsin
       53707

     - Bay Harbour Management, L.C., 777 South Harbour Island Boulevard, Suite
       270, Tampa, Florida 33602

                                       115
<PAGE>   123

                               PAGENET'S BUSINESS

     PageNet is a provider of wireless messaging services throughout the United
States and in the U.S. Virgin Islands, Puerto Rico and Canada. It provides
services in all 50 states and the District of Columbia, including service in the
100 most populated markets in the United States. PageNet also owns a minority
interest in a wireless messaging company in Brazil.

     The main services of PageNet are numeric and alphanumeric wireless
messaging services. Numeric pagers allow a subscriber to receive a numeric
message, such as a telephone number to call back or a pre-arranged code, and
alphanumeric pagers allow a subscriber to receive numeric and text messages. As
of June 30, 2000, numeric pagers represented approximately 82% of PageNet's
total units in service with subscribers and alphanumeric pagers represented
approximately 17% of PageNet's total units in service with subscribers. However,
total units in service have declined each quarter since their high of 10,604,000
at June 30, 1998 and are expected to continue to decline in the second half of
2000. In addition, PageNet sells confirmed receipt paging services, which enable
subscribers to receive acknowledgements that their messages were delivered,
services which enable subscribers to respond to messages with their messaging
devices by using pre-scripted replies, and send-and-receive services, which
enable subscribers to initiate messages and to respond to messages with their
messaging devices by using pre-scripted replies or by creating original replies.
These services presently account for approximately 1% of PageNet's total units
in service. PageNet is currently developing other applications for its wireless
network through its wholly owned subsidiary, Vast, as described more fully
below.

STRATEGY AND RESTRUCTURING

     In February 1998, PageNet announced its intention to refocus its strategy
from rapid expansion and subscriber growth towards profitable growth. The major
components of this realignment have included:

     - restructuring and consolidation of its operations by eliminating
       redundant administrative and support functions located in offices
       throughout the country into centralized processing centers;

     - completing the build-out of its new advanced messaging network, and
       launching new, advanced messaging services for its customers;

     - developing other applications for its network to provide "wireless
       solutions" to customers;

     - focusing PageNet's sales and marketing efforts on more profitable
       services, such as alphanumeric and nationwide paging; and

     - increasing prices of some services.

     RESTRUCTURING OF OPERATIONS.  In February, 1998, PageNet's board of
directors approved a restructuring of PageNet's domestic operations. PageNet's
restructuring plan called for the elimination of redundant administrative
operations by consolidating key support functions located in offices throughout
the country into centralized processing facilities. In addition, the
restructuring plan called for the conversion to new billing and customer service
software platforms. The restructuring plan specified local and regional office
closures, the disposition of certain furniture, fixtures, and equipment and the
termination of approximately 1,950 employees by job function and location. While
progress in establishing these centralized processing centers was made,
PageNet's efforts to convert its offices to its new billing and customer service
software platforms fell behind its original schedule of being completed during
the second quarter of 1999. Billing software and system implementation problems
surfaced during the first office conversions, and as a result, PageNet had to
postpone the conversion of many of its other offices. Additional implementation
problems surfaced during 1999 and caused further delays. In November 1999, and
in conjunction with the announcement of PageNet's planned merger with Arch,
PageNet decided to suspend the restructuring after January 2000 pending the
decision as to which operating platforms will be used by the combined company.
During May 2000, a decision was made to use Arch's existing billing and customer
service systems upon completion of the merger. The decisions regarding other
systems to be utilized by the combined company are still pending.
                                       116
<PAGE>   124

     PageNet has converted to its new billing and customer service software
systems all of its customer units placed in service by its resellers and
approximately 50% of its directly placed customer units. However, due to the
suspension of the restructuring, combined with the impact of the contemplated
merger on its operations, PageNet is unable to determine the amount of future
savings resulting from the consolidation initiative.

     COMPLETION OF ADVANCED MESSAGING NETWORK.  On February 1, 2000, PageNet
launched its advanced messaging services. PageNet currently intends to invest
approximately $15 million in the network during 2000. This investment is
intended to complete the buildout of sites started in the fourth quarter of 1999
and expand capacity in certain cities throughout the nation during 2000, and
will substantially complete PageNet's investment in its advanced messaging
network.

     DEVELOPING "WIRELESS SOLUTIONS" BUSINESS OF VAST.  PageNet has been engaged
in several efforts to develop additional uses for its networks. In June 1999,
PageNet consolidated its initiative to develop advanced services, including
wireless data and wireless solutions, into Vast. Vast is a development stage
company and, since its inception, has been engaged primarily in product research
and development and developing markets for its products and services. In 1999
and for the six months ended June 30, 2000, Vast had total revenues of $1
million and $3 million, respectively and incurred operating losses of
approximately $36 million and $11 million, respectively, as a result of these
startup activities. Through Vast, PageNet is commencing operations that can
connect corporate mobile users with Internet or corporate data networks using
wireless devices. Vast's initial focus is on large businesses with mobile
workforces.

     REALIGNMENT OF SALES AND MARKETING STRUCTURE. PageNet has reviewed its
customers and prospects in each market in order to design a sales and marketing
structure that is more closely aligned with its customers' needs and with
PageNet's overall goal of having its customers move to higher revenue products.
This new sales structure, which was implemented in April 1999, enables PageNet
to sell a diversified portfolio of products to a sophisticated group of
customers. This structure includes account segmentation and focused selling
skills, career paths for all sales personnel, sales targets, training
curriculums for each selling group, and competitive compensation plans.

     PRICE INCREASES.  In an effort to improve the profitability of some of its
services, PageNet implemented price increases in late 1998 and 1999 to some of
its customers. As a result of these price increases, increased competition in
the marketplace for wireless messaging services, and other factors, PageNet's
units in service have decreased each quarter from the third quarter of 1998
through the second quarter of 2000, and this trend is expected to continue in
the second half of 2000. PageNet experienced its first year-to-year increase in
average revenue per unit in 1998, although average revenue per unit declined
during the second, third, and fourth quarters of 1999. Average revenue per unit
increased during the first quarter of 2000 and decreased during the second
quarter of 2000. PageNet continues to review its pricing structure for all of
its services.

SALES AND DISTRIBUTION

     PageNet's services are sold to its customers through both direct and
indirect distribution channels. The direct channel consists of selling services
to customers through local employee sales representatives who call on prospects
and customers or take orders at storefront locations, as well as sales completed
through PageNet's internet store. The indirect channel consists of selling
services to customers primarily through resellers. PageNet does not depend upon
any single subscriber or reseller for a significant portion of its net revenues.

     As of June 30, 2000, direct sales accounted for approximately 49% of
PageNet's overall units in service, and the indirect sales channel accounted for
approximately 51%. In the direct channel, PageNet charges a monthly fee and
either leases or sells its messaging devices to its customers. In the indirect
channel, PageNet provides services to resellers under marketing agreements at
wholesale service rates. PageNet sells or leases messaging devices to resellers,
who sell PageNet's services to end users. Resellers

                                       117
<PAGE>   125

are typically responsible for all costs associated with servicing their
customers. However, in some cases, resellers may contract with PageNet to
provide billing and other customer service functions.

MARKETING

     PageNet promotes its products and services through a variety of programs,
including print, newspaper, yellow pages advertising, and co-op programs with
manufacturers and other third parties. Traditionally, PageNet has focused its
marketing efforts primarily on business users, who represent the majority of its
subscribers.

MESSAGING DEVICES AND TRANSMISSION EQUIPMENT

     PageNet currently purchases messaging devices primarily from Motorola,
Inc., transmitters from Glenayre Technologies, Inc. and Motorola, and wireless
messaging terminals from Glenayre. Motorola has announced its intention to
discontinue manufacturing transmitters and other paging infrastructure during
2000, although it will continue to maintain and service existing infrastructure
into the future. PageNet believes that it will be able to continue to purchase
messaging devices from Motorola and other sources and be able to purchase paging
infrastructure from sources other than Motorola.

     PageNet's technical functions include testing of new messaging devices and
transmission equipment, designing wireless transmission systems and installing
and maintaining transmitters to support PageNet's transmission system. Because
of the compatibility among different transmitters, computers, and other
messaging equipment, PageNet can design its systems without being dependent upon
any single supplier.

     As of June 30, 2000, PageNet owned messaging devices having a net book
value of approximately $102 million.

INTERNATIONAL OPERATIONS

     PageNet provides services in Canada similar to those offered in the United
States through its wholly owned subsidiary, Paging Network of Canada Inc.
PageNet has sales operations in Montreal, Ottawa, Quebec City, Toronto, and
Vancouver. PageNet services a geographic area containing more than 75% of the
population of Canada.

     PageNet holds a minority interest in a wireless messaging company in
Brazil. PageNet, through its subsidiaries, also owns frequency licenses in the
United Kingdom, Argentina, and Chile. PageNet is currently considering options
to return these licenses to the regulatory bodies in each of these countries.
PageNet recorded a provision of $18 million during the first quarter of 1999 for
the impairment of the assets of its majority-owned Spanish subsidiaries in
accordance with Statement of Financial Accounting Standards No. 121, "Accounting
for the Impairment of Long-Lived Assets and for Long-Lived Assets to Be Disposed
Of," which requires impairment losses to be recorded on long-lived assets used
in operations when indicators of impairment are present and the undiscounted
cash flows estimated to be generated by those assets are less than the assets'
carrying amount. During the first quarter of 1999, PageNet made the decision to
narrow its focus to its North American operations and, as a result, made the
decision to sell or otherwise dispose of its operations in Spain. As a result of
this decision, PageNet analyzed the estimated future cash flows expected to be
generated from its Spanish operations and determined that they would not be
sufficient to recover the net book value of the assets of the subsidiaries and
accordingly, recorded a provision to write down the assets of the Spanish
subsidiaries based on the estimated value of PageNet's investment in its Spanish
subsidiaries as of March 31, 1999. No cash costs have been incurred or are
expected as a result of the provision for the impairment of the assets of
PageNet's Spanish subsidiaries. All operations in the Spanish subsidiaries were
ceased in the third quarter of 1999. No additional charges are required.

     PageNet's international subsidiaries are not debtors in the chapter 11
case. PageNet is not considering opportunities for international expansion at
this time.

                                       118
<PAGE>   126

COMPETITION

     PageNet has numerous competitors in all of the locations in which it
operates. Competition in most geographic markets is based primarily on price,
type and quality of service offered and geographic coverage. In addition to
other wireless messaging companies, PageNet experiences significant competition
from companies which provide PCS and cellular telephones and, more recently,
also offer traditional and advanced messaging services and Internet access. Many
of these competitors possess financial, technical and other resources greater
than those of PageNet. PageNet's competitors currently include wireless
messaging carriers such as Vodafone/AirTouch/Bell Atlantic (a combined company
now called Verizon), BellSouth Wireless Data, L.P., MCI WorldCom, Inc., Skytel
Communications, Inc., Metrocall, Inc., Nextel Communications, Inc., RSR, Sprint
PCS Group, and WebLink Wireless, Inc., formerly known as PageMart Wireless.

     Future technological advances in wireless messaging could create new
services or products which could be competitive with the services provided by
PageNet. PageNet continuously evaluates new technologies and applications in
wireless services. However, PageNet cannot guarantee that it will not be
adversely affected by technological changes in wireless messaging.

TRADEMARKS

     PageNet markets its services under various names and marks, including
PageNet(R), PageMail(R), PageMate(R), PageNet Nationwide(R), SurePage(R),
FaxNow(R), and MessageNow(R), all of which are federally registered service
marks. PageNet's federal mark registrations must be renewed at various times
between 2000 and 2005. PageNet has filed applications with the United States
patent and trademark office to register additional names and marks.

CORPORATE ORGANIZATION

     Historically, PageNet's subsidiaries operated as independent business units
making their own staffing, administrative, operational and marketing decisions
within guidelines established by the executive officers of PageNet. Effective
December 31, 1998, PageNet merged a substantial number of its operating
subsidiaries into PageNet, Inc., a first tier subsidiary of PageNet. PageNet has
eight wholly owned domestic subsidiaries. As of December 31, 1999, PageNet
conducted its international operations through eleven wholly and partially owned
subsidiaries. In March 2000, PageNet sold its interest in its Spanish
subsidiary.

SEASONALITY

     PageNet's results of operations are not significantly affected by seasonal
factors.

EMPLOYEES

     PageNet had approximately 4,200 employees as of June 30, 2000. Of these
employees, approximately 1,800 were engaged in administrative, customer service,
and technical capacities at PageNet's headquarters and its centralized
processing facilities. Approximately 2,400, including approximately 950 sales
personnel, were employed in PageNet's domestic and international offices. In
addition to its 4,200 employees, PageNet had approximately 800 temporary workers
in various customer service and administrative roles as of June 30, 2000. As a
result of PageNet's restructuring efforts, PageNet eliminated approximately 300
permanent and 850 temporary positions during 1999. None of PageNet's employees
is represented by a labor union. During 1999, PageNet experienced high employee
turnover primarily due to its restructuring initiative. PageNet is currently
continuing to experience a high employee turnover rate due to its deteriorating
financial results and its pending merger with Arch.

                                       119
<PAGE>   127

PROPERTIES

     As of June 30, 2000, PageNet leased office space in 108 cities in 34 states
in the United States and the District of Columbia, and in six cities in four
provinces in Canada. These leases expire, subject to renewal options, on various
dates through December 31, 2007. PageNet also leases office space for its
corporate headquarters in Dallas, Texas under a lease that expires in June 2003.
As of December 31, 1999, PageNet was paying annualized rent of approximately $28
million. This amount includes amounts paid under leases that are to be closed as
part of PageNet's restructuring, but excludes any potential income from
subleasing these facilities. PageNet has suspended further restructuring during
2000 pending a determination as to the infrastructure to be used by the combined
company following the merger.

     PageNet also leases sites for its transmitters on commercial broadcast
towers, buildings, and other structures. As of June 30, 2000, PageNet leased
transmitter sites for between 10,000 and 12,000 transmitters. A few local
municipalities have suspended the designation of new transmitter locations
and/or the addition of new towers. Should these suspensions, or others, continue
for an extended period of time, they could affect PageNet's and other wireless
carriers' ability to offer coverage in those areas.

     In July 1996, PageNet purchased 44 acres of undeveloped land at the Legacy
Office Park in Plano, Texas for a new corporate headquarters. During 1998,
PageNet decided to lease, rather than build, a new corporate headquarters and
subsequently entered into an agreement in December 1998 with Electronic Data
Systems Corporation, the owner and developer of the Legacy Office Park, for the
marketing and resale of the property. The Legacy Office Park property was sold
in December 1998 for a purchase price of approximately $15 million. Beginning in
June 1998, PageNet leased office space for its corporate headquarters in Dallas,
Texas under a five-year lease term.

LEGAL PROCEEDINGS

     PageNet is involved in various lawsuits arising in the normal course of
business. In management's opinion, the ultimate outcome of these lawsuits will
not have a material adverse effect on PageNet's business, financial position, or
results of operations.

     On July 14, 2000, three senior subordinated noteholders commenced an
involuntary proceeding against PageNet under chapter 11 of the United States
Bankruptcy Code. The petition related solely to Paging Network, Inc. and not to
any of its subsidiaries. On July 24, 2000, Paging Network, Inc. consented to an
order for relief, which in effect, converted the involuntary chapter 11 petition
into a voluntary proceeding. On the same date, Paging Network, Inc.'s domestic
subsidiaries other than Vast filed voluntary chapter 11 petitions in the United
States Bankruptcy Court. Subsequent to the petition date, PageNet and its
domestic subsidiaries other than Vast are operating as debtors-in-possession and
are subject to the jurisdiction of the United States Bankruptcy Court for the
District of Delaware. Chapter 11 is the principal business reorganization
chapter of the United States Bankruptcy Code. Under chapter 11 of the bankruptcy
code, a debtor is authorized to reorganize its business for the benefit of its
creditors and stockholders.

     The bankruptcy court has exercised supervisory powers over the operations
of PageNet with respect to the employment of attorneys, investment bankers and
other professionals, and transactions out of the ordinary course of business or
otherwise requiring bankruptcy court approval under the bankruptcy code. PageNet
has been paying undisputed obligations that have arisen subsequent to the
petition date on a timely basis. Since the petition date, the bankruptcy court
has entered orders, among other things, allowing PageNet (1) to pay certain
customer refunds and deposits in the ordinary course of business, (2) to pay
wages, salaries and benefits owing to employees, and (3) to pay pre-petition
obligations owed to continuing vendors as such obligations come due.

     On July 25, 2000, PageNet filed a joint plan of reorganization and
disclosure statement which provide for the implementation of the merger as
PageNet's plan of reorganization. A hearing with respect to the bankruptcy
court's approval of the disclosure statement is scheduled for September 7, 2000,
at which time the bankruptcy court will determine if the joint plan of
reorganization providing for the implementation of the merger will be submitted
to PageNet's creditors and stockholders for approval. PageNet's motion to assume
the merger termination fee and certain related provisions of the merger
agreement was approved

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<PAGE>   128

by the bankruptcy court on August 22, 2000. On August 4, 2000, Metrocall filed a
motion requesting that the bankruptcy court terminate PageNet's exclusivity
period and permit Metrocall to submit a competing plan of reorganization in
PageNet's chapter 11 reorganization. A continued hearing on that motion is
scheduled for September 7, 2000. On August 22, 2000, the bankruptcy court also
granted Metrocall the right to conduct a limited due diligence investigation of
PageNet through September 1, 2000.

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<PAGE>   129

                              PAGENET'S MANAGEMENT

EXECUTIVE OFFICERS AND DIRECTORS

     The following table sets forth the name, age and position of PageNet's
directors and executive officers as of June 30, 2000:

<TABLE>
<CAPTION>
NAME                                   AGE                           POSITION
----                                   ---                           --------
<S>                                    <C>    <C>
Richard C. Alberding.................  69     Director (1)(2)
Lynn A. Bace.........................  47     Executive Vice President and Chief Administrative
                                                Officer
Andreas K. Bremer....................  43     Vice President of Finance and Treasurer
Hermann Buerger......................  56     Director (1)(4)(5)
Julian B. Castelli...................  32     Senior Vice President and Chief Financial Officer and
                                                  Acting Chief Financial Officer of Vast
Jeffrey M. Cunningham................  48     Director (3)
Gary J. Fernandes....................  57     Director (3)(4)(5)
John P. Frazee, Jr. .................  55     Chairman of the Board of Directors and Chief Executive
                                                Officer of PageNet and Vast (4)
Jason G. Gillespie...................  39     Senior Vice President and Chief Technology Officer
John S. Llewellyn, Jr. ..............  65     Director (2)(3)(5)
Robert J. Miller.....................  55     Director (2)(3)
Edward W. Mullinix, Jr. .............  46     President and Chief Operating Officer
Timothy J. Paine.....................  46     Senior Vice President -- Customer Service
Douglas R. Ritter....................  42     Senior Vice President -- Sales
G. Robert Thompson...................  38     Senior Vice President -- Operations Staff
Ruth Williams........................  43     Senior Vice President, General Counsel and Assistant
                                                Secretary
</TABLE>

---------------
(1) Member of the Audit Committee of the Board of Directors.

(2) Member of the Board Affairs Committee of the Board of Directors.

(3) Member of the Compensation and Management Development Committee of the Board
    of Directors.

(4) Member of the Executive Committee of the Board of Directors.

(5) Member of the Finance Committee of the Board of Directors.

     RICHARD C. ALBERDING has been a director of PageNet since 1994. From 1958
through 1991, Mr. Alberding held various management positions with
Hewlett-Packard Co., including Executive Vice President. Mr. Alberding also
serves as a director of Digital Microwave Corporation, Kennametal, Inc., Sybase,
Inc., Walker Interactive Systems, Inc., JLK Direct, Inc. and PCTel, Inc.

     LYNN A. BACE has served as Executive Vice President and Chief
Administrative Officer of PageNet since June 1999. She served as Executive Vice
President -- Sales and Marketing of PageNet from December 1998 through June
1999, and as Senior Vice President -- Marketing of PageNet from August 1998 to
December 1998. Prior to that, Ms. Bace was employed in several executive
positions with Kraft Foods, Inc. from September 1993 to April 1997, most
recently as Executive Vice President and General Manager for a division of
Kraft.

     ANDREAS K. BREMER has served as Vice President of Finance and Treasurer of
PageNet since February 2000, and as Vice President and Treasurer since joining
PageNet in August 1999. Prior to that time, Mr. Bremer served in various
executive positions with Commerzbank AG from 1986 to 1999, most recently as
Senior Vice President and General Manager of various branches in the United
States and Germany.

                                       122
<PAGE>   130

     HERMANN BUERGER has been a director of PageNet since 1998. Mr. Buerger has
held the position of Executive Vice President and General Manager of North
American Operations for Commerzbank AG since 1989. Mr. Buerger also serves as a
director of Security Capital Group, Inc. and United Dominion Industries.

     JULIAN B. CASTELLI has served as Senior Vice President and Chief Financial
Officer of PageNet since June 1999. He also serves as Acting Chief Financial
Officer of Vast, a position he has held since December 1999. Mr. Castelli served
as Vice President and Treasurer for PageNet from July 1998 to June 1999. Prior
to joining PageNet, Mr. Castelli was employed by McKinsey & Company, an
international consulting firm, from August 1995 to July 1998, serving as
Engagement Manager from June 1997. Mr. Castelli served in the Corporate Finance
Department of Goldman, Sachs & Co. as an analyst from 1990 to 1993.

     JEFFREY M. CUNNINGHAM has been a director of PageNet since 1998. Mr.
Cunningham currently serves as Chairman of ILIFE Holdings. Mr. Cunningham served
as the President of Planet Direct, an internet media company and majority owned
subsidiary of CMGI, Inc., from December 1998 to March 2000. Previously, Mr.
Cunningham served as President and Chief Executive Officer of Knowledge
Universe, an internet media company, from July 1998 through December 1998. From
June 1993 through July 1998, Mr. Cunningham was the Group Publisher for Forbes,
Inc. Mr. Cunningham also serves as a director of Countrywide Credit, Inc., Data
General Corp. and Schindler Holdings.

     GARY J. FERNANDES has been a director of PageNet since 1999. Mr. Fernandes
is Chairman of the Board of Directors and Chief Executive Officer of
GroceryWorks.com, a Dallas-based Internet home fulfillment service specializing
in groceries since January 2000. Previously, Mr. Fernandes served as Managing
Partner of Convergent Partners LLC, a private equity capital investment firm
from January 1999 to January 2000. Mr. Fernandes previously held the position of
Vice Chairman as well as other senior management positions with Electronic Data
Systems Corporation from 1969 through 1998. Mr. Fernandes also serves as a
director of 7-Eleven Inc. and John Wiley & Sons, Inc.

     JOHN P. FRAZEE, JR. has been a director of PageNet since 1995 and has
served as Chairman of the Board of Directors and Chief Executive Officer of
PageNet since June 1999 and of Vast since December 1999. From August 1997
through June 1999, Mr. Frazee served as Chairman of the Board, President and
Chief Executive Officer of PageNet. Mr. Frazee was a private investor from
August 1993 to August 1997. Mr. Frazee also serves as a director of Security
Capital Group, Inc., Dean Foods Company, Cabot Microelectronics Corporation and
Homestead Village Incorporated.

     JASON G. GILLESPIE has served as Senior Vice President and Chief Technology
Officer of PageNet since February 2000. From October 1999 through February 2000
Mr. Gillespie served as Senior Vice President of Network Services, and from June
1999 to October 1999 he served as Vice President of Network Services of PageNet.
From December 1997 to June 1999 Mr. Gillespie was Vice President of Field
Operations of PageNet. Mr. Gillespie was a Vice President and General Manager of
PageNet prior to December 1997 and has been employed by PageNet for eight years.

     JOHN S. LLEWELLYN, JR. has been a director of PageNet since 1997. From 1982
to his retirement in 1997, Mr. Llewellyn held various management positions with
Ocean Spray Cranberries, Inc., including Chief Executive Officer. Mr. Llewellyn
also serves as a director of Dean Foods Company.

     ROBERT J. MILLER has been a director of PageNet since 1999. From 1989 to
January 1999, Mr. Miller served as the Governor of Nevada. Upon his retirement
as Governor, Mr. Miller became a Senior Partner in the law firm of Jones Vargas
in Las Vegas, Nevada and Reno, Nevada. Mr. Miller also serves as a director of
America West Airlines, International Game Technology, Newmont Mining
Corporation, Zenith Insurance Corp., National Center for Missing & Exploited
Children and the American Cancer Society Foundation; and as a member of the
Advisory Board of the Secretary of Energy, Americans for Technology Leadership
and Com-Net Ericsson.

     EDWARD W. MULLINIX, JR. has served as President and Chief Operating Officer
of PageNet since June 1999. He served as Executive Vice President -- Operations
for PageNet from February 1998 through June
                                       123
<PAGE>   131

1999, and as Senior Vice President -- Strategic Planning for PageNet from
November 1997 to February 1998. From September 1995 to October 1997, Mr.
Mullinix served as Senior Vice President of Finance and Administration and Chief
Financial Officer of The Haskell Company. He was Vice President -- Finance for
LCI, Ltd. from August 1994 to April 1995.

     TIMOTHY J. PAINE has served as Senior Vice President -- Customer Service
for PageNet since March 1998. Prior to joining PageNet, Mr. Paine served in
various positions for American Express Travel Related Services, Inc. from 1982
to March 1998, most recently as Vice President of Credit and Operations for the
new accounts branch of American Express Centurion Bank.

     DOUGLAS R. RITTER has served as Senior Vice President -- Sales for PageNet
since January 1999. Mr. Ritter served as Senior Vice President -- Corporate
Development for PageNet from February 1998 to January 1999 and as Vice
President -- Corporate Development for PageNet from December 1997 to February
1998. Mr. Ritter served as Vice President -- Business Planning for PageNet from
January 1996 to December 1997 and as Vice President -- New Business Development
for PageNet from July 1993 to January 1996.

     G. ROBERT THOMPSON has served as Senior Vice President -- Operations Staff
for PageNet since June 1999. He also served as Senior Vice President -- Process
Improvement for PageNet from November 1998 to June 1999. Mr. Thompson served as
Vice President -- Finance for PageNet from February 1995 to November 1998 and
was Corporate Controller for PageNet from 1990 to 1995.

     RUTH WILLIAMS has served as Senior Vice President, General Counsel and
Assistant Secretary for PageNet since May 1997. Prior to joining PageNet, Ms.
Williams was Associate General Counsel for First Data Corporation from September
1996 to April 1997. Ms. Williams was employed by Automatic Data Processing, Inc.
from 1986 to 1996, most recently as Staff Vice President and Associate General
Counsel.

COMPENSATION OF DIRECTORS

     Directors that are also full-time officers of PageNet do not receive any
additional compensation for serving on the board or its committees. Directors
who are not full-time officers receive an annual retainer of $20,000, plus
$1,500 for each meeting they attend in person, $1,000 for each teleconference
meeting in which they participate, and reimbursement for traveling costs and
other out-of-pocket expenses incurred. Directors who serve on one or more
committees receive $5,000 per year for their service. Directors who serve as a
chairman of one or more of these committees receive an additional $5,000 per
year.

     In addition, pursuant to PageNet's 1992 director compensation plan, each
non-employee director is granted an option to purchase 45,000 shares of PageNet
common stock. The exercise price is the fair market value on the date of grant.
The options vest in five equal annual installments so long as the person remains
a director of PageNet. In addition to these initial grants, subsequent grants to
purchase an additional 45,000 shares are made to each director on the date that
the options granted to such director under the 1992 director compensation plan
become fully exercisable. The exercise price for these options is also the fair
market value on the date of the grant. These options vest in five equal annual
installments so long as the person remains a director of PageNet.

     The 1992 director compensation plan also allows a director to waive his or
her right to the cash retainer and meeting fees and instead:

     - receive the number of shares of PageNet common stock equal to the dollar
       amount of the annual retainer, meeting and other fees due for such year;

     - defer receipt of all compensation until a designated future date, and
       invest such compensation in an interest-bearing account; or

     - defer receipt of all compensation until a designated future date, and
       invest such compensation in a phantom stock account whose value will
       increase and decrease with the value of PageNet's stock.

                                       124
<PAGE>   132

     A director who elects to defer receipt of his or her cash retainer and
meeting fees and invest such compensation in a phantom stock plan will be
credited with share units, with one share unit being equivalent to a share of
PageNet common stock. The number of share units deposited in a director's
deferred compensation account is equal to the amount of compensation deferred
divided by the then current trading price of PageNet common stock. Although no
actual shares of PageNet common stock are transferred into the director's
deferred compensation account, the value of the director's share units equal the
trading price of PageNet's common stock from time to time. Directors elect the
form, method and timing of the distribution of the deferred compensation.
Directors may elect to receive distributions of the amounts credited with share
units in the form of cash, shares of PageNet common stock, or in any combination
of cash and shares of PageNet common stock.

     In 1998, each director waived his rights to cash payments and elected to
receive deferred shares of PageNet common stock. Messrs. Alberding, Buerger,
Fernandes and Llewellyn elected to defer their compensation to phantom stock
units in 1999. Messrs. Cunningham and Miller elected to receive their 1999
compensation in cash. All directors have elected to receive their 2000
compensation in cash.

SUMMARY COMPENSATION TABLE

     The following table sets forth information concerning the annual and
long-term compensation paid by PageNet for services rendered in all capacities
for the years ended December 31, 1999, 1998 and 1997 of PageNet's chief
executive officer, and those persons who were, at December 31, 1999, the other
four most highly compensated executive officers of PageNet. Positions indicated
are as of December 31, 1999.

<TABLE>
<CAPTION>
                                            ANNUAL COMPENSATION                LONG-TERM COMPENSATION
                                  ----------------------------------------    ------------------------
                                                                                            SECURITIES
                                                                              RESTRICTED    UNDERLYING          ALL
                                                                                STOCK        OPTIONS           OTHER
                                  YEAR     SALARY      BONUS       OTHER      AWARDS($)      (SHARES)     COMPENSATION(1)
                                  ----    --------    --------    --------    ----------    ----------    ---------------
<S>                               <C>     <C>         <C>         <C>         <C>           <C>           <C>
John P. Frazee, Jr. ............  1999    $640,385    $     --    $ 95,958(2) $      --        311,500       $  2,229
  Chairman and                    1998     671,875     430,000      90,706(3)        --        100,000          2,333
  Chief Executive Officer of      1997     279,571(4)  150,000      50,938(5)   100,000(6)     600,000         20,000(7)
  PageNet and Vast
Mark A. Knickrehm(8)............  1999     299,038          --       4,172(9)        --        165,000          3,875
  President and Chief             1998     266,036     230,000(10)   43,573(11)        --      300,000             --
  Operating Officer of Vast       1997          --          --          --           --             --             --
Edward W. Mullinix, Jr.(12).....  1999     292,949          --       4,928(13)        --       165,000          4,825
  President and Chief             1998     247,916     120,000      41,589(14)        --        50,000          3,750
  Operating Officer               1997      45,337      60,000       7,837(15)        --       250,000             --
Lynn A. Bace(16)................  1999     216,218          --       2,742(17)        --       115,000             --
  Executive Vice President and    1998      93,750      51,000          --           --        250,000             --
  Chief Administrative Officer    1997          --          --          --           --             --             --
William G. Scott(18)............  1999     213,462          --       2,043(19)        --        25,000          5,000
  Senior Vice President -- Chief  1998     224,583      72,000          --           --         20,000          5,000
  Technology Officer of Vast      1997     215,000      80,000          --       55,313(20)    113,464          4,750
</TABLE>

---------------
 (1) Represents matching contributions to PageNet's 401(k) Plan, except where
     noted.

 (2) Includes housing allowance of $61,069.

 (3) Includes housing allowance of $66,158.

 (4) Annual compensation for 1997 represents compensation for the period from
     August 4, 1997, when Mr. Frazee became Chairman, President and Chief
     Executive Officer of PageNet, through December 31, 1997.

 (5) Includes payment of $23,214 to defray Mr. Frazee's expenses associated with
     relocation to the Dallas, Texas area.

 (6) Represents the fair market value on the date of grant of 11,510 shares of
     PageNet common stock awarded to Mr. Frazee on August 4, 1997.

 (7) Represents compensation for services rendered as a non-employee director of
     PageNet.

                                       125
<PAGE>   133

 (8) Annual compensation for 1998 represents compensation for the period from
     February 4, 1998, when Mr. Knickrehm became employed with PageNet as its
     Executive Vice President and Chief Financial Officer, through December 31,
     1998. On June 2, 1999, Mr. Knickrehm was promoted to President and Chief
     Operating Officer of Vast. On May 26, 2000, Mr. Knickrehm resigned as
     President and Chief Operating Officer of Vast.

 (9) Includes $4,928 of long-term disability insurance premiums paid by PageNet.

(10) Includes a $100,000 employment bonus and $130,000 paid as an annual bonus
     for performance in 1998.

(11) Includes payments of $43,573 made to defray Mr. Knickrehm's expenses
     associated with relocation to the Dallas, Texas area.

(12) Mr. Mullinix joined PageNet on November 3, 1997 as Senior Vice President of
     Strategic Planning, and was promoted to Executive Vice
     President -- Operations of PageNet on February 4, 1998. On June 2, 1999,
     Mr. Mullinix was promoted to President and Chief Operating Officer of
     PageNet.

(13) Includes $4,928 of long-term disability insurance premiums paid by PageNet.

(14) Includes payment of $41,589 made to defray Mr. Mullinix's expenses
     associated with relocation to the Dallas, Texas area.

(15) Includes payments of $7,837 made to defray Mr. Mullinix's expenses
     associated with relocation to the Dallas, Texas area.

(16) Ms. Bace joined PageNet on August 19, 1998 as Senior Vice President of
     Marketing and was promoted to Executive Vice President and Chief
     Administrative Officer of PageNet on June 2, 1999.

(17) Includes $2,742 of long-term disability insurance premiums paid by PageNet.

(18) Mr. Scott served as Senior Vice President and Chief Technology Officer of
     PageNet from June 1999 through December 1999. Upon Mr. Scott's change to
     his current position with Vast, he was no longer an executive officer of
     PageNet; therefore, Mr. Scott is not listed as an executive officer of
     PageNet in "PageNet's Management."

(19) Includes $2,043 of long-term disability insurance premiums paid by PageNet.

(20) Represents the fair market value on the date of grant of 5,000 shares of
     PageNet common stock awarded to Mr. Scott on February 2, 1997, vesting at
     the rate of 20% per year beginning on February 2, 1998 through 2002,
     contingent upon meeting performance goals.

                                       126
<PAGE>   134

OPTION GRANTS IN 1999

     The following table sets forth information on grants of options to purchase
PageNet common stock during the year ended December 31, 1999, to PageNet's chief
executive officer and those persons who were, at December 31, 1999, the other
most highly compensated executive officers of PageNet.

<TABLE>
<CAPTION>
                                NUMBER OF    PERCENTAGE OF
                                 SHARES      TOTAL OPTIONS
                               UNDERLYING     GRANTED TO                                        PRESENT VALUE
                                 OPTIONS       EMPLOYEES                                           ON DATE
NAME                           GRANTED (1)      IN 1999      EXERCISE PRICE   EXPIRATION DATE    OF GRANT(2)
----                           -----------   -------------   --------------   ---------------   -------------
<S>                            <C>           <C>             <C>              <C>               <C>
John P. Frazee, Jr. .........    311,500         7.54%          $6.1250          01/20/09        $1,907,938

Mark A. Knickrehm(3).........     65,000                         6.1250          01/20/09           398,125
                                 100,000                         3.3438          06/10/09           334,380
                                 -------                                                         ----------
          Subtotal...........    165,000         3.99%                                              732,505
                                 -------                                                         ----------

Edward W. Mullinix, Jr. .....     65,000                         6.1250          01/20/09           398,125
                                 100,000                         3.3438          06/10/09           334,380
                                 -------                                                         ----------
          Subtotal...........    165,000         3.99%                                              732,505
                                 -------                                                         ----------

Lynn A. Bace.................     65,000                         6.1250          01/20/09           398,125
                                  50,000                         3.3438          06/10/09           167,190
                                 -------                        -------                          ----------
          Subtotal...........    115,000         2.78%                                              565,315
                                 -------                                                         ----------

William G. Scott.............     25,000            *            6.1250          01/20/09           153,125
</TABLE>

---------------
 *  Less than 1%

(1) All options are exercisable only so long as employment continues or within
    limited periods following termination of employment. All options have a term
    of 10 years. All options vest in five equal annual installments beginning on
    the date of the grant, except that all of such options would vest at the
    closing of the merger by virtue of a change in control of the ownership of
    PageNet.

(2) The determination of the present value of PageNet common stock on the date
    of the grant is based on the Black-Scholes pricing model. Estimated values
    under the Black-Scholes model are based on standard assumptions as to
    variables in the model such as stock price volatility, projected future
    dividend yield and interest rates. In addition, the estimated value is
    discounted for potential forfeiture due to vesting schedules. The discount
    rate is consistent with PageNet's employment turnover experience over time.
    The estimated Black-Scholes values above are based on a range of values for
    the key variable. The range reflects different values in effect on the grant
    date of the option: volatility -- ranged from .559 to .583; dividend
    yield -- 0%; turnover -- 8% per year; risk-free interest rate -- yield to
    maturity of 10-year treasury note at grant date (rates ranged from 5.41% to
    5.56%). The actual value, if any, that an executive may realize will depend
    on the excess of the stock price over the exercise price on the date the
    option is exercised. There is no assurance that the value realized by an
    executive will be at or near the value estimated using a Black-Scholes
    model. Currently, all such stock options have no value because the trading
    price of PageNet shares is below the option exercise prices.

(3) On May 26, 2000, Mr. Knickrehm resigned as President and Chief Operating
    Officer of Vast.

                                       127
<PAGE>   135

AGGREGATE OPTION EXERCISES IN 1999 AND YEAR-END OPTION VALUES

     The following table sets forth information related to the unexercised
options to purchase PageNet common stock that were granted during the year ended
December 31, 1999, and prior years under PageNet's 1991 stock option plan to the
named officers and held by them at December 31, 1999.

<TABLE>
<CAPTION>
                                                            NUMBER OF UNEXERCISED          VALUE OF UNEXERCISED
                                                                OPTIONS HELD            IN-THE-MONEY OPTIONS HELD
                            SHARES                          AT DECEMBER 31, 1999         AT DECEMBER 31, 1999(1)
                          ACQUIRED ON                    ---------------------------   ----------------------------
NAME                       EXERCISE     VALUE REALIZED   EXERCISABLE   UNEXERCISABLE   EXERCISABLE    UNEXERCISABLE
----                      -----------   --------------   -----------   -------------   -----------    -------------
<S>                       <C>           <C>              <C>           <C>             <C>            <C>
John P. Frazee, Jr......       0              0            820,600        235,900           0               0
Mark A. Knickrehm(2)....       0              0            226,000        239,000           0               0
Edward W. Mullinix,
  Jr....................       0              0            226,000        239,000           0               0
Lynn A. Bace............       0              0            136,000        229,000           0               0
William G. Scott........       0              0            105,464         53,000           0               0
</TABLE>

---------------
(1) Based on the difference between the exercise price of each option and
    $0.8130, the last reported sales price of PageNet common stock on the Nasdaq
    National Market on December 31, 1999, the last trading date in PageNet's
    1999 fiscal year.
(2) On May 26, 2000, Mr. Knickrehm resigned as President and Chief Operating
    Officer of Vast, and forfeited all options.

CONTRACTS RELATED TO EMPLOYMENT

     PageNet and Mr. Frazee entered into an employment agreement on August 4,
1997. This agreement provides that Mr. Frazee is to be employed until July 31,
1998. The agreement is automatically extended for one-year periods unless either
PageNet or Mr. Frazee notifies the other party of termination not less than 90
days prior to the beginning of any one-year renewal period. The employment
agreement provided for a base salary of $650,000 and a target bonus of $350,000
if PageNet achieved the objectives established by the board of directors during
the initial one-year term of the contract, and allowed the board to change Mr.
Frazee's compensation during subsequent one-year terms. Mr. Frazee's current
base salary is $675,000 and current target bonus is $675,000 if PageNet achieves
the objectives established by the board of directors. The employment agreement
also provides that at least 40% of the bonus is to be paid in shares of PageNet
common stock. The board of directors gave Mr. Frazee his 1997 and 1998 bonuses
in cash, with the understanding that he would use 40% or more of the bonus to
purchase PageNet common stock in the public market. No bonus was awarded in
1999. Mr. Frazee has purchased shares in excess of this requirement. Upon
signing the employment agreement, Mr. Frazee was granted options to purchase
600,000 shares of common stock, all of which have vested. Mr. Frazee also was
awarded 11,510 shares of PageNet common stock under PageNet's 1997 restricted
stock plan. In addition, PageNet provides Mr. Frazee with transportation to and
from his residence in Florida.

     On January 20, 1999, the board of directors approved a severance plan which
would provide benefits to substantially all of PageNet's employees in the event
of a "change of control" of PageNet. "Change of control" is defined as any
merger, sale or other transaction which results in 35% or more of PageNet common
stock being held by an outsider, or any change in the composition of a majority
of the board of directors. This definition is consistent with the change of
control provisions that trigger accelerated vesting under PageNet's 1991
employee stock option plan. The severance plan provides for severance amounts
ranging from 50% to 300% of an employee's annual salary and annual target bonus
compensation and payment of a pro-rated portion of the employee's target bonus
compensation. In addition, the severance plan provides that the employee will
continue to receive substantially similar medical insurance, disability income
protection, life insurance protection and death benefits, and perquisites for at
least one year following the date of the employee's termination of employment at
no additional cost to the employee above the cost paid by the employee for such
benefits immediately prior to the change of control. The severance plan provides
no special pension benefits. An employee is entitled to receive benefits under
the severance plan if PageNet or its successor in interest terminates the
employee without cause or the employee resigns for good reason during the
12-month period immediately following a change in control. Good reasons for an
employee's resignation under the severance plan include a reduction in the
employee's

                                       128
<PAGE>   136

compensation, a significant change in the employee's duties, responsibilities,
title or authorities, relocation of the employee's office to a location more
than 50 miles from the location of the employee's office prior to the change in
control, and PageNet's failure to obtain the agreement from a successor to
assume and agree to perform the severance plan. The amount an employee will
receive depends upon the employee's position at PageNet. Payments under the plan
are made in one lump sum. At the time of its consideration of the Arch merger,
PageNet's board of directors approved an increase in the severance percentages
applicable to the Chairman and Chief Executive Officer, President and Chief
Operating Officer, Executive Vice President and Chief Administrative Officer,
Senior Vice President and Chief Financial Officer of the PageNet or President
and Chief Operating Officer of Vast from 200% to 300%, and the Regional Sales
Vice Presidents from 100% to 200%, of their annual salary and annual target
bonus compensation. Subsequently, the board approved a further amendment to the
plan to provide for a gross up of the amount payable to John P. Frazee, Jr.,
Edward W. Mullinix, Jr., Lynn A. Bace and Julian B. Castelli under the plan on
account of excise taxes anticipated to be payable by those individuals upon a
distribution pursuant to the plan. PageNet's severance plan will be assumed by
PageNet either pursuant to the bankruptcy plan or pursuant to a motion filed by
PageNet prior to confirmation of the bankruptcy plan.

                                       129
<PAGE>   137

                              THE COMBINED COMPANY

BUSINESS

     The combined company to be formed by the merger of Arch and PageNet will be
the largest paging company and one of the largest wireless messaging companies
in the United States, in terms of units in service.

     PageNet and Arch believe that the combined company will be better
positioned than either company is currently to compete with large telephone,
cellular and PCS providers which are increasingly offering well accepted
services that compete effectively with both traditional and advanced paging
services, in some cases at significantly lower prices. The combination of
PageNet's range of wireless messaging products and advanced wireless messaging
network with Arch's extensive national accounts and sales and marketing
infrastructure should enable the combined company to:

     - offer advanced messaging services and an expanded set of related products
       and services such as Internet-based wireless information, over PageNet's
       advanced wireless messaging network, with the goal of offsetting the
       growing decline in demand for traditional paging services by increased
       demand for advanced messaging services;

     - create significant economic efficiencies which may help the combined
       company to continue to price its services and products competitively; and

     - create a financially stronger company as a result of the reduced leverage
       of the combined company, although the combined company's pro forma
       leverage ratio of approximately 4.0 times earnings before interest,
       income taxes, depreciation and amortization may still impair its
       operational flexibility.

     Nevertheless, there can be no assurance that the combined company will
successfully meet the challenges posed by declining demand for traditional
paging services and increasing competition from large telephone, cellular and
PCS providers.

MANAGEMENT

     The combined company's board of directors will consist of six designees of
the current Arch board, three designees of the PageNet board and up to three
designees of PageNet's three largest noteholders. If any of such noteholders do
not designate directors for themselves, Arch's current board will designate
additional directors instead, so that there may be up to nine Arch nominees.

     None of PageNet's three largest noteholders has informed Arch or PageNet
whether it intends to designate a director. PageNet's board has not yet
designated its three directors to the board of the combined company. Arch's
board has not yet designated its six directors to the board of the combined
company.

     Mr. Frazee will become chairman of the board of the combined company, Mr.
Baker will continue to serve as chief executive officer, and Arch's other
executive officers will retain their current positions. Arch has announced the
senior management team for the combined company, which does not include any
PageNet officers. If all of the officers wished to continue but were terminated
or constructively terminated, they would receive a total of approximately $14.2
million in estimated severance benefits. See "PageNet's Management -- Change of
Control Severance Plan."

PRO FORMA INFORMATION, UNAUDITED FINANCIAL PROJECTIONS AND OPERATIONAL COST
SYNERGIES

     On a pro forma basis at June 30, 2000, the combined company would have had
approximately 14.0 million units in service, total assets of $2.8 billion and
total long-term debt of $1.8 billion, assuming that all of the outstanding
discount notes are exchanged for common stock. For the year ended December 31,
1999, the combined company would have had pro forma total revenues of $1.7
billion, adjusted pro forma earnings before interest, income taxes, depreciation
and amortization of $471.0 million
                                       130
<PAGE>   138

and net loss of $435.0. This pro forma net loss excludes the effects of an
extraordinary gain relating to the extinguishment of debt of $7.0 million and
the negative $40.8 million cumulative effect of accounting change relating to
Arch's and PageNet's original application of Statement of Position 98-5
"Reporting on The Costs of Start-Up Activities." For the six months ended June
30, 2000, the combined company would have had pro forma total revenues of $814.5
million, adjusted pro forma earnings before interest, income taxes, depreciation
and amortization of $215.4 million and a net loss of $228.6 million. This pro
forma net loss excludes the effect of an extraordinary gain of $52.1 million
relating to the extinguishment of Arch debt. These amounts also excludes the
impact of expected operational cost synergies. For the year ended December 31,
1999, the combined company's pro forma cash flows provided by operating
activities used in investing activities and provided by financing activities
would have been $325.2 million, $894.7 million and $717.7 million, respectively.
For the six months ended June 30, 2000, the combined company's pro forma cash
flows provided by operating activities used in investing activities, and
provided by financing activities were $159.4 million, $82.3 million and $27.9
million, respectively. The adjusted pro forma cash flow information assumes that
the merger and related transactions had been effected as of January 1, 1999.
Leverage for the combined company on a pro forma basis, as measured by the ratio
of total debt to adjusted pro forma earnings before interest, income taxes,
depreciation and amortization for the year ended December 31, 1999 and the six
months ended June 30, 2000, would have been 3.8 to 1.0 and 4.3 to 1.0,
respectively. This also excludes the impact of expected operational cost
synergies. Adjusted pro forma earnings before interest, income taxes,
depreciation and amortization is earnings before interest, income taxes,
depreciation and amortization, net of restructuring charges, bankruptcy related
expenses, equity in loss of affiliates, income tax benefit, interest and
non-operating expenses (net) and extraordinary items. See "Unaudited Pro Forma
Condensed Consolidated Financial Statements."

     Arch and PageNet have developed the unaudited combined company projections
contained in Annex D. The projections consist of projected operating and
financial results for the three months ending December 31, 2000 and the year
ending December 31, 2001. The projections assume that the merger and related
transactions will take place as of October 1, 2000. The projections have been
prepared for filing with the bankruptcy court following the methodology
customarily used by companies in preparing projections for filing with a
bankruptcy court.

     THE COMBINED COMPANY PROJECTIONS WERE NOT PREPARED TO COMPLY WITH THE
GUIDELINES FOR PROSPECTIVE FINANCIAL STATEMENTS PUBLISHED BY THE AMERICAN
INSTITUTE OF CERTIFIED PUBLIC ACCOUNTANTS. NEITHER THE INDEPENDENT ACCOUNTANTS
FOR ARCH NOR THE INDEPENDENT AUDITORS FOR PAGENET HAVE EXAMINED OR COMPILED THE
ACCOMPANYING PROJECTIONS AND ACCORDINGLY DO NOT EXPRESS AN OPINION OR ANY OTHER
FORM OF ASSURANCE WITH RESPECT TO THE PROJECTIONS, ASSUME NO RESPONSIBILITY FOR
THE PROJECTIONS AND DISCLAIM ANY ASSOCIATION WITH THE PROJECTIONS.

     ARCH AND PAGENET DO NOT PUBLISH PROJECTIONS OF THEIR RESPECTIVE ANTICIPATED
FINANCIAL POSITION OR RESULTS OF OPERATIONS. HOWEVER, TO THE EXTENT THEY BELIEVE
THAT THE SECURITIES LAWS REQUIRE, ARCH AND PAGENET WILL:

     - FURNISH UPDATED COMBINED COMPANY PROJECTIONS,

     - INCLUDE SUCH UPDATED INFORMATION IN ANY DOCUMENTS WHICH MAY BE REQUIRED
       TO BE FILED WITH THE SEC, OR

     - OTHERWISE MAKE SUCH UPDATED INFORMATION PUBLICLY AVAILABLE.

     THE SECURITIES LAWS REQUIRE FULL AND PROMPT DISCLOSURE OF MATERIAL FACTS,
BOTH FAVORABLE AND UNFAVORABLE, REGARDING ARCH'S AND PAGENET'S FINANCIAL
CONDITION AND MAY EXTEND TO SITUATIONS WHERE MANAGEMENT KNOWS OR HAS REASON TO
KNOW ITS PREVIOUSLY DISCLOSED PROJECTIONS NO LONGER HAVE A REASONABLE BASIS.
MANAGEMENT OF ARCH AND PAGENET BELIEVE THAT THE PROJECTED AMOUNTS ARE THE MOST
PROBABLE SPECIFIC AMOUNTS THAT THEY CAN FORECAST AND THAT THE ESTIMATES AND
ASSUMPTIONS THEY HAVE MADE IN ARRIVING AT THESE AMOUNTS ARE REASONABLE. THE
ESTIMATES AND ASSUMPTIONS MAY NOT BE REALIZED, HOWEVER, AND ARE INHERENTLY
SUBJECT TO SIGNIFICANT BUSINESS, ECONOMIC AND COMPETITIVE UNCERTAINTIES AND
CONTINGENCIES, MANY OF WHICH ARE BEYOND THE CONTROL OF ARCH AND PAGENET. NO
REPRESENTATIONS CAN BE OR

                                       131
<PAGE>   139

ARE MADE AS TO WHETHER ACTUAL RESULTS WILL MEET THE RESULTS SET FORTH IN THE
COMBINED COMPANY PROJECTIONS. SOME ASSUMPTIONS INEVITABLY WILL NOT MATERIALIZE,
AND EVENTS AND CIRCUMSTANCES OCCURRING SUBSEQUENT TO THE DATE ON WHICH THE
PROJECTIONS WERE PREPARED MAY BE DIFFERENT FROM THOSE ASSUMED OR MAY BE
UNANTICIPATED, AND THEREFORE MAY AFFECT FINANCIAL RESULTS IN A MATERIAL AND
POSSIBLY ADVERSE MANNER. THE PROJECTIONS, THEREFORE, ARE NOT A GUARANTEE OR
OTHER ASSURANCE THAT THE ACTUAL RESULTS THAT WILL OCCUR, AS PROJECTED. SEE
"FORWARD-LOOKING STATEMENTS."

     The projections contemplate that Arch should be able to operate its
business, fund its foreseeable capital commitments and service its debt for the
three months ending December 31, 2000 and the year ending December 31, 2001. The
projections contemplate that, for the three months ending December 31, 2000,
Arch will borrow approximately $10.0 million under its available line of credit
so that, together with its projected opening cash balance of $49.2 million and
projected adjusted earnings before interest, income taxes, depreciation and
amortization of $112.5 million, it will have sufficient cash to pay projected
interest of $50.8 million, capital expenditures of $59.0 million, transaction
costs and working capital requirements relating to the merger of $52.4 million
and reduce borrowings by a projected $5.6 million. During 2001, the projections
contemplate that adjusted earnings before interest, income taxes, depreciation
and amortization of $507.0 million will be sufficient to pay projected interest
of $192.0 million, income taxes of $15.0 million, capital expenditures of $232.3
million, working capital requirements of $10.3 million and reduce borrowings by
a projected $54.2 million.

                                       132
<PAGE>   140

                          DESCRIPTION OF INDEBTEDNESS

     Arch and its principal operating subsidiaries each have substantial amounts
of outstanding indebtedness that provide necessary funding and impose various
limitations on Arch's operations.

  Secured Credit Facility

     A principal operating subsidiary has a secured credit facility that
currently permits it to borrow up to $577.9 million from The Bank of New York,
Royal Bank of Canada, Toronto Dominion (Texas), Inc., Barclays Bank, PLC and
other financial institutions. At December 31, 1999, $438.9 million of borrowings
were outstanding.

     The facility consists of a $175.0 million reducing revolving Tranche A
facility, a $100.0 million Tranche B facility and a $302.9 million Tranche C
facility. The Tranche A Facility will be reduced on a quarterly basis commencing
on September 30, 2000 and will mature on June 30, 2005. The Tranche B Facility
converted into a term loan on June 27, 1999 and will be amortized in quarterly
installments commencing September 30, 2000, with an ultimate maturity date of
June 30, 2005. The Tranche C Facility began amortizing in annual installments
commencing December 31, 1999, with an ultimate maturity date of June 30, 2006.

     On March 23, 2000, the senior credit facility was amended to add a $746.6
million Tranche B-1 term loan to be used to assume obligations under PageNet's
existing credit facility upon completion of the pending PageNet merger. The
Tranche B-1 term loan will be amortized in quarterly installments commencing
March 31, 2001, with an ultimate maturity date of June 30, 2006.

     Arch and substantially all of its operating subsidiaries are either
borrowers or guarantors under the secured credit facility. Direct obligations
and guarantees under the facility are secured by a pledge of the capital stock
of some operating subsidiaries and by security interests in various assets.

     Borrowings under the secured credit facility bear interest based on a
reference rate equal to either:

     - The Bank of New York's announced alternate base rate plus a margin of
       between 0.75% and 5.625%, determined by comparing total debt to
       annualized earnings before interest, income taxes, depreciation and
       amortization;

     - The Bank of New York's announced LIBOR rate, plus a margin of between
       2.0% and 6.875%, determined by comparing total debt to annualized
       earnings before interest, income taxes, depreciation and amortization.

     The weighted average interest rate was 11.5% on June 30, 2000 and has
varied from 10.7% to 11.6% since the facility was comprehensively amended in
June 1999.

     The secured credit facility requires payment of fees on the daily average
amount available to be borrowed under the Tranche A facility. These fees vary
depending on specified ratios of total debt to annualized earnings before
interest, income taxes, depreciation and amortization.

     The secured credit facility contains restrictions that limit, among other
things:

     - additional indebtedness and encumbrances on assets;

     - cash dividends and other distributions;

     - mergers and sales of assets;

     - the repurchase or redemption of capital stock;

     - investments;

     - acquisitions that exceed certain dollar limitations without the lenders'
       prior approval; and

     - prepayment of indebtedness other than indebtedness under the secured
       credit facility.

                                       133
<PAGE>   141

     In addition, the secured credit facility requires Arch and its subsidiaries
to meet financial covenants, including ratios of earnings before interest,
income taxes, depreciation and amortization to fixed charges, earnings before
interest, income taxes, depreciation and amortization to debt service, earnings
before interest, income taxes, depreciation and amortization to interest service
and total indebtedness to earnings before interest, income taxes, depreciation
and amortization.

  Subsidiary's Senior Notes

     Another principal operating subsidiary of Arch has the following issues of
unsecured senior notes outstanding:

<TABLE>
<CAPTION>
PRINCIPAL AMOUNT     INTEREST
ACCRETED AT 9/30/99    RATE      MATURITY DATE     INTEREST PAYMENT DATES
-------------------  --------   ----------------   ----------------------
<S>                  <C>        <C>                <C>
$125.0 million        9 1/2%    February 1, 2004   February 1, August 1
$100.0 million           14%    November 1, 2004   May 1, November 1
$127.5 million       12 3/4%    July 1, 2007       January 1, July 1
$139.8 million       13 3/4%    April 15, 2008     April 15, October 1
</TABLE>

     Redemption.  The subsidiary may choose to redeem any amounts of these
senior notes during the periods indicated in the following table. The redemption
prices will equal the indicated percentages of the principal amount of the
notes, together with accrued and unpaid interest to the redemption date:

<TABLE>
<CAPTION>
                 9 1/2% SENIOR NOTES
------------------------------------------------------
REDEMPTION DATE                       REDEMPTION PRICE
---------------                       ----------------
<S>                                   <C>
February 1, 1999 to January 31, 2000     104.750%
February 1, 2000 to January 31, 2001     103.167%
February 1, 2001 to January 31, 2002     101.583%
On or after February 1, 2002             100.000%
</TABLE>

<TABLE>
<CAPTION>
                   14% SENIOR NOTES
------------------------------------------------------
REDEMPTION DATE                       REDEMPTION PRICE
---------------                       ----------------
<S>                                   <C>
November 1, 1999 to October 31, 2000     107.000%
November 1, 2000 to October 31, 2001     104.625%
November 1, 2001 to October 31, 2002     102.375%
On or after November 1, 2002             100.000%
</TABLE>

<TABLE>
<CAPTION>
                 12 3/4% SENIOR NOTES
------------------------------------------------------
REDEMPTION DATE                       REDEMPTION PRICE
---------------                       ----------------
<S>                                   <C>
July 1, 2003 to June 30, 2004            106.375%
July 1, 2004 to June 30, 2005            104.250%
July 1, 2005 to June 30, 2006            102.125%
On or after July 1, 2006                 100.000%
</TABLE>

<TABLE>
<CAPTION>
                 13 3/4% SENIOR NOTES
------------------------------------------------------
REDEMPTION DATE                       REDEMPTION PRICE
---------------                       ----------------
<S>                                   <C>
April 15, 2004 to April 14, 2005         106.875%
April 15, 2005 to April 14, 2006         104.583%
April 15, 2006 to April 14, 2007         102.291%
On or after April 15, 2007               100.000%
</TABLE>

                                       134
<PAGE>   142

     In addition, until July 1, 2001, the subsidiary may elect to use the
proceeds of a qualifying equity offering to redeem up to 35% in principal amount
of the 12 3/4% senior notes until July 1, 2001, or up to 35% in principal amount
of the 13 3/4% senior notes until April 15, 2002, at a redemption price equal to
112.75% of the principal amount of the 12 3/4% senior notes or 113.75% of the
principal amount of the 13 3/4% senior notes, together with accrued interest.
The subsidiary may make such redemption, however, only if 12 3/4% senior notes
with an aggregate principal amount of at least $84.5 million remain outstanding
immediately after giving effect to any such redemption of 12 3/4% senior notes,
and only if 13 3/4% senior notes with an aggregate principal amount of at least
$95.6 million remain outstanding immediately after giving effect to any such
redemption of 13 3/4% senior notes. Arch is not, however, obligated to redeem
any 12 3/4% senior notes or 13 3/4% senior notes with the proceeds of any equity
offering.

     Restrictive Covenants.  The indentures for the senior notes limit the
ability of specified subsidiaries to pay dividends, incur secured or unsecured
indebtedness, incur liens, dispose of assets, enter into transactions with
affiliates, guarantee parent company obligations, sell or issue stock and engage
in any merger, consolidation or sale of substantially all of their assets.

     Changes in Control.  Upon the occurrence of a change of control of Arch or
a principal operating subsidiary, each holder of senior notes has the right to
require repurchase of its senior notes for cash. The repurchase prices for the
four series of senior notes vary from 101% to 102% of the principal amount of
such notes plus accrued and unpaid interest to the date of repurchase. A change
of control of a corporation, as defined in the indentures, includes:

     - the acquisition by a person or group of beneficial ownership of the
       majority of securities having the right to vote in the election of
       directors;

     - specified types of changes in the board of directors;

     - the sale or transfer of all or substantially all of the corporation's
       assets; or

     - merger or consolidation with another corporation which results in a
       person or group becoming the beneficial owner of a majority of the
       securities of the surviving corporation having the right to vote in the
       election of directors.

     Arch does not believe that the merger will result in a change in control,
as defined.

     Events of Default.  The following constitute events of default under the
indentures:

     - a default in the timely payment of interest on the senior notes if such
       default continues for 30 days;

     - a default in the timely payment of principal of, or premium, if any, on
       any of the senior notes either at maturity, upon redemption or
       repurchase, by declaration or otherwise;

     - the borrowers' failure to observe or perform any of their other covenants
       or agreements in the senior notes or in the indenture, but generally only
       if the failure continues for a period of 30 or 60 days after written
       notice of default;

     - specified events of bankruptcy, insolvency or reorganization involving
       the borrowers;

     - a default in timely payment of principal, premium or interest on any
       indebtedness for borrowed money aggregating $5.0 million or more in
       principal amount;

     - the occurrence of an event of default as defined in any indenture or
       instrument involving at least $5.0 million aggregate principal amount of
       indebtedness for borrowed money that gives rise to the acceleration of
       such indebtedness;

     - the entry of one or more judgments, orders or decrees for the payment of
       more than a total of $5.0 million, net of any applicable insurance
       coverage, against the borrowers or any of their properties; or

     - the holder of any secured indebtedness aggregating at least $5.0 million
       in principal amount seeks foreclosure, set-off or other recourse against
       assets of the borrowers having an aggregate fair market value of more
       than $5.0 million.
                                       135
<PAGE>   143

  Arch's Discount Notes

     In March 1996, Arch issued 10 7/8% discount notes representing $467.4
million in aggregate principal amount at maturity. The discount notes are
scheduled to mature on March 15, 2008. The discount notes were issued at a
substantial discount from the principal amount due at maturity. As of June 30,
2000, Arch has outstanding $172.4 principal amount at maturity of discount
notes. Interest does not accrue on the discount notes prior to March 15, 2001.
After that date, interest will accrue at the rate of 10 7/8% per year, payable
semi-annually on March 15 and September 15, commencing September 15, 2001.

     Arch may choose to redeem any amount of discount notes on or after March
15, 2001 at the following redemption prices, together with accrued and unpaid
interest to the redemption date:

<TABLE>
<CAPTION>
REDEMPTION DATE                                                 REDEMPTION PRICE
---------------                                           ----------------------------
<S>                                                       <C>
March 15, 2001 to March 14, 2002                          104.078% of principal amount
March 15, 2002 to March 14, 2003                          102.719% of principal amount
March 15, 2003 to March 14, 2004                          101.359% of principal amount
On or after March 15, 2004                                100.000% of principal amount
</TABLE>

     The indenture for the discount notes contains restrictive covenants, change
in control provisions and events of default that are generally comparable to
those of the senior notes described above.

  Arch's Convertible Debentures

     As of June 30, 2000, Arch has outstanding $1.0 million in principal amount
of 6 3/4% convertible subordinated debentures due 2003. Interest is payable
twice a year on June 1 and December 1. The convertible debentures are scheduled
to mature on December 1, 2003. The principal amount of the convertible
debentures is currently convertible into common stock at a conversion price of
$50.25 per share at any time prior to redemption or maturity.

     Arch may choose to redeem any amount of the convertible debentures at any
time, at the following redemption prices, together with accrued and unpaid
interest to the redemption date:

<TABLE>
<CAPTION>
REDEMPTION DATE                                                 REDEMPTION PRICE
---------------                                           ----------------------------
<S>                                                       <C>
December 1, 1997 to November 30, 1998                     104.050% of principal amount
December 1, 1998 to November 30, 1999                     103.375% of principal amount
December 1, 1999 to November 30, 2000                     102.700% of principal amount
December 1, 2000 to November 30, 2001                     102.025% of principal amount
December 1, 2001 to November 30, 2002                     101.350% of principal amount
December 1, 2002 to November 30, 2003                     100.675% of principal amount
On or after December 1, 2003                              100.000% of principal amount
</TABLE>

     The convertible debentures represent senior unsecured obligations of Arch
and are subordinated to senior indebtedness of Arch, as defined in the
indenture. The indenture does not contain any limitation or restriction on the
incurrence of senior indebtedness or other indebtedness or securities of Arch or
its subsidiaries.

     Upon the occurrence of a fundamental change, as defined in the indenture,
each holder of convertible debentures has the right to require Arch to
repurchase its convertible debentures for cash, at a repurchase price of 100% of
the principal amount of the convertible debentures, plus accrued interest to the
repurchase date. The following constitute fundamental changes:

     - acquisition by a person or a group of beneficial ownership of stock of
       Arch entitled to exercise a majority of the total voting power of all
       capital stock, unless such beneficial ownership is approved by the board
       of directors;

     - specified types of changes in Arch's board of directors;

                                       136
<PAGE>   144

     - any merger, share exchange, or sale or transfer of all or substantially
       all of the assets of Arch to another person, with specified exceptions;

     - the purchase by Arch of beneficial ownership of shares of its common
       stock if the purchase would result in a default under any senior debt
       agreements to which Arch is a party; or

     - distributions of common stock by Arch to its stockholders in specified
       circumstances.

     The following constitute events of default under the indenture:

     - a default in the timely payment of any interest on the convertible
       debentures if such default continues for 30 days;

     - a default in the timely payment of principal or premium on any
       convertible debenture at maturity, upon redemption or otherwise;

     - a default in the performance of any other covenant or agreement of Arch
       that continues for 30 days after written notice of such default;

     - a default under any indebtedness for money borrowed by Arch that results
       in more than $5.0 million of indebtedness being accelerated; or

     - the occurrence of events of bankruptcy, insolvency or reorganization with
       respect to Arch.

                                       137
<PAGE>   145

                             ARCH'S SPECIAL MEETING

     We are furnishing this proxy statement to the holders of Arch common stock,
Class B common stock, Series C preferred stock and Class D preferred stock in
connection with the solicitation of proxies by the Arch board of directors for
use at the special meeting of Arch stockholders to be held on Thursday, October
5, 2000, and any adjournment or postponement of the meeting. We have included a
form of proxy for use at the special meeting with each copy of this proxy
statement.

     This proxy statement and the accompanying form of proxy are first being
furnished to the Arch stockholders on or about September 5, 2000.

DATE, TIME AND PLACE

     The special meeting will be held on Thursday, October 5, 2000 at 11:00
a.m., local time, at the offices of Hale and Dorr LLP, 60 State Street, Boston,
MA 02109.

MATTERS TO BE CONSIDERED

     At the special meeting and any adjournment or postponement of the special
meeting, Arch stockholders will be asked:

     - to consider and vote upon a proposal to issue up to approximately
       130,000,000 shares of Arch's common stock pursuant to the agreement and
       plan of merger, dated as of November 7, 1999, as subsequently amended,
       among Arch, PageNet and a wholly owned subsidiary of Arch;

     - to consider and vote upon a proposal to amend Arch's restated certificate
       of incorporation to: increase the number of authorized shares of Arch
       common stock from 150,000,000 to 300,000,000 shares; and

     - to transact such other business as may properly come before the special
       meeting.

     The approval of each of the first two proposals is conditioned upon
approval of the other proposal. Accordingly, a vote against either of the first
two proposals will have the same effect as a vote against both proposals.

VOTING AND REVOCATION OF PROXIES

     If you attend the special meeting, you may vote by ballot. The Arch board
of directors is soliciting proxies, however, to ensure that Arch stockholders
have the opportunity to vote on the proposals to be considered at the special
meeting if they are unable to attend. Accordingly, we request that you complete,
date and sign the accompanying proxy and promptly return it in the accompanying
postage-paid envelope or otherwise mail it to Arch. Brokers holding shares in
"street name" as nominees for their clients may vote the shares only if the
beneficial stockholder provides instructions on how to vote. Brokers will
provide beneficial owners instructions on how to direct the brokers to vote the
shares. All properly executed proxies that Arch receives prior to the vote at
the special meeting that are not revoked will be voted in accordance with the
instructions indicated on the proxies. If no direction is indicated, the proxies
will be voted to approve each of the proposals.

     The Arch board of directors does not currently intend to bring any other
business before the special meeting and, so far as the Arch board of directors
knows, no other matters are to be brought before the special meeting. If any
other matters are properly presented for consideration, including, among other
things, consideration of a motion to adjourn or postpone such meeting to another
time and/or place for the purposes of soliciting additional proxies or allowing
additional time for the satisfaction of conditions to the merger agreement, the
persons named in the enclosed form of proxy and acting thereunder generally will
have discretion to vote on such matters in accordance with their best judgment.

                                       138
<PAGE>   146

     Stockholders may revoke their proxies at any time prior to its use by

     - delivering to the secretary of Arch a signed notice of revocation or a
       later-dated, signed proxy; or

     - attending the special meeting and voting in person.

     Attendance at the special meeting does not in itself constitute the
revocation of a proxy.

VOTE REQUIRED

     At the close of business on August 11, 2000, the record date, there were
63,961,997 shares of Arch common stock outstanding and entitled to one vote per
share; 2,508,652 shares of Class B common stock outstanding and entitled to
1/100th of one vote per share, 250,000 shares of Series C preferred stock
outstanding and entitled to 7.1576 votes per share and 1,000,000 shares of
Series D preferred stock outstanding and entitled to 6.61318 votes per share.

     Holders of shares of Arch common stock, Class B common stock, Series C
preferred stock and Series D preferred stock will vote together as a single
class on each of the proposals.

     The approval of the issuance of shares of Arch common stock pursuant to the
merger agreement will require the affirmative vote of the holders of a majority
of the shares present and entitled to vote. The approval of this proposal is
required by the rules of the NASD governing corporations with securities
approved for quotation on the Nasdaq National Market System. Under Delaware law,
the adoption of the amendment to the certificate of incorporation will require
the affirmative vote of the holders of a majority of all shares of Arch common
stock, Class B common stock, Series C preferred stock and Series D preferred
stock, whether present or not at the special meeting.

     The special meeting may be adjourned, and additional proxies may be
solicited, if the vote necessary to approve a proposal has not been obtained.
Any adjournment of the special meeting will require the affirmative vote of the
holders of the shares represented, whether in person or by proxy, of the special
meeting (regardless of whether these shares constitute a quorum).

QUORUM; ABSTENTIONS AND BROKER NON-VOTES

     The required quorum for the transaction of business at the special meeting
is a majority of the outstanding shares of Arch common stock, Class B common
stock, Series C preferred stock and Series D preferred stock (calculated on an
as-converted basis, assuming conversion of all Class B common stock, Series C
preferred stock and Series D preferred stock, and voting together as a single
class) entitled to vote at the special meeting. Abstentions and broker non-votes
will be counted for purposes of determining the presence of a quorum. In
determining whether the proposal to issue shares of Arch's common stock pursuant
to the merger agreement has received the requisite number of affirmative votes
for approval, abstentions and broker non-votes will not be counted as votes in
favor of the proposal, and also will not be counted as shares voting on the
proposal. Accordingly, abstentions and broker non-votes will have no effect on
the outcome of the proposal. Because approval of the proposed charter amendment
requires the affirmative vote of a majority of the shares entitled to vote on
the proposal, abstentions and broker non-votes will not be counted as votes in
favor of the proposal. Accordingly, abstentions and broker non-votes will have
the same effect as a vote against the proposal. In addition, the failure of an
Arch stockholder to return a proxy or vote in person will have the effect of a
vote against the proposal. Brokers holding shares for a beneficial owner in
"street" name cannot vote on the actions proposed in the proxy statement without
the beneficial owner's specific instructions. Arch stockholders therefore are
urged to return the enclosed proxy card marked to indicate their vote, if the
proxy card is in their name, or to give instructions to their broker, if their
shares are held in "street" name.

SOLICITATION OF PROXIES AND EXPENSES

     All expenses of Arch's solicitation of proxies will be paid by Arch. The
cost of preparing and mailing this proxy statement will be shared equally by
Arch and PageNet. In addition to solicitation by mail,

                                       139
<PAGE>   147

proxies may be solicited by directors, officers and employees of Arch in person
or by telephone, facsimile, email or other means of communication. Any
directors, officers and employees soliciting proxies will not be additionally
compensated, but may be reimbursed for reasonable expenses incurred in
connection with the solicitation.

     Arch has retained MacKenzie Partners, Inc. to assist in the solicitation of
proxies from its stockholders. The fees to be paid to MacKenzie Partners, Inc.
for its services are expected to be approximately $15,000, plus reasonable
expenses. Brokerage houses, nominees, fiduciaries and other custodians will be
requested to forward soliciting materials to beneficial owners and will be
reimbursed for their reasonable expenses incurred in sending proxy materials to
beneficial owners.

APPRAISAL RIGHTS

     Holders of Arch common stock, Class B common stock, Series C preferred
stock and Series D preferred stock will not be entitled to any appraisal rights
in connection with the matters to be voted upon at the special meeting.

RECOMMENDATION OF THE ARCH BOARD OF DIRECTORS

     THE ARCH BOARD OF DIRECTORS HAS DETERMINED THAT EACH OF THE PROPOSALS IS
FAIR TO, AND IN THE BEST INTERESTS OF, ARCH AND ITS STOCKHOLDERS. ACCORDINGLY,
THE ARCH BOARD OF DIRECTORS HAS UNANIMOUSLY APPROVED THE MERGER AGREEMENT AND
THE TRANSACTIONS CONTEMPLATED BY THE MERGER AGREEMENT AND RECOMMENDS THAT YOU
VOTE FOR EACH OF THE PROPOSALS ON WHICH YOU ARE ENTITLED TO VOTE.

     THE MATTERS TO BE CONSIDERED AT THE SPECIAL MEETING ARE OF GREAT IMPORTANCE
TO THE ARCH STOCKHOLDERS. ACCORDINGLY, ARCH STOCKHOLDERS ARE URGED TO READ AND
CAREFULLY CONSIDER THE INFORMATION PRESENTED IN THIS PROXY STATEMENT, AND TO
COMPLETE, DATE, SIGN AND PROMPTLY RETURN THE ENCLOSED PROXY IN THE ENCLOSED
POSTAGE-PAID ENVELOPE.

                             STOCKHOLDER PROPOSALS

     Any proposal that a stockholder intends to present at Arch's 2001 annual
meeting of stockholders must be submitted to the secretary of Arch at its
offices, 1800 West Park Drive, Suite 250, Westborough, Massachusetts 01581, no
later than December 29, 2000 in order to be considered for inclusion in the
proxy statement relating to that meeting.

     In addition, Arch's by-laws require that Arch be given advance notice of
stockholder nominations for election to Arch's board of directors and of other
matters which stockholders wish to present for action at an annual meeting of
stockholders, other than matters included in Arch's proxy statement in
accordance with Rule 14a-8. The required notice must be made in writing and
delivered or mailed to the secretary of Arch at the principal offices of Arch,
and received not less than 80 days prior to the annual meeting of stockholders;
provided, however, that if less than 90 days' notice or prior public disclosure
of the date of the meeting is given or made to stockholders, such nomination may
be mailed or delivered to the secretary not later than the close of business on
the tenth day following the date on which the notice of the meeting was mailed
or such public disclosure was made, whichever occurs first. The 2001 annual
meeting of stockholders is currently expected to be held on May 15, 2001.
Assuming that this date does not change, in order to comply with the time
periods set forth in Arch's by-laws, appropriate notice would need to be
provided to the secretary no later than February 23, 2001.

                                       140
<PAGE>   148

                      WHERE YOU CAN FIND MORE INFORMATION

     Arch and PageNet file reports, proxy statements and other information with
the Securities and Exchange Commission as required by the Exchange Act.

     MobileMedia Communications, Inc. and MobileMedia Corporation were also
subject to the informational requirements of the Securities Exchange Act of 1934
but filed only limited reports after the commencement of their bankruptcy
proceedings in January 1997. Financial statements included in MobileMedia
Communications, Inc. and MobileMedia Corporation's periodic reports from
February 1997 through June 1998 were not prepared in accordance with generally
accepted accounting principles due to those companies' inability at the time of
such filings to determine the amount of an impairment loss related to long-lived
assets pursuant to Financial Accounting Standard No. 121. Those financial
statements are unaudited and have been revised periodically based on subsequent
determinations of changes in facts and circumstances impacting previously filed
unaudited financial statements. The audited financial statements of MobileMedia
contained in this proxy statement reflect adjustments from the unaudited
statements, including an impairment adjustment of $792.5 million recorded as of
December 31, 1996.

     You can find, copy and inspect information filed by Arch, by PageNet and,
to the extent available, by MobileMedia Communications, Inc. and MobileMedia
Corporation with the Securities and Exchange Commission at the public reference
facilities maintained by the Securities and Exchange Commission at Room 1024,
450 Fifth Street, N.W., Washington, D.C. 20549 and at the Securities and
Exchange Commission's regional offices at 7 World Trade Center, Suite 1300, New
York, New York 10048 and 500 West Madison Street, Suite 1400, Chicago, Illinois
60661. You can obtain copies of information filed by Arch with the Securities
and Exchange Commission at prescribed rates by writing to the Securities and
Exchange Commission's Public Reference Section, 450 Fifth Street, N.W.,
Washington, D.C. 20549. You can call the Securities and Exchange Commission at
1-800-SEC-0330 for further information about the public reference rooms. You can
review Arch's, PageNet's, MobileMedia Communications, Inc. and MobileMedia
Corporation's electronically filed reports, proxy and information statements on
the Securities and Exchange Commission's world wide web site at
http://www.sec.gov. Arch's common stock trades on the Nasdaq National Market
under the symbols "APGR", PageNet's common stock was traded on the Nasdaq
SmallCap Market under the symbol "PAGE". Therefore, you can inspect reports,
proxy statements and other information concerning Arch and PageNet at the
offices of the National Association of Securities Dealers, Inc., Market Listing
Section, 1735 K Street, N.W., Washington, D.C. 20006. Arch maintains a world
wide web site at http://www.arch.com. PageNet maintains a world wide web site at
http://www.pagenet.com. Neither Arch's nor PageNet's web site is a part of this
proxy statement.

     YOU MAY REQUEST A COPY OF ARCH'S, PAGENET'S AND MOBILEMEDIA'S FILINGS WITH
THE SECURITIES AND EXCHANGE COMMISSION, AT NO COST, BY WRITING OR TELEPHONING
ARCH AT THE FOLLOWING ADDRESS:

                        ARCH COMMUNICATIONS GROUP, INC.
                        1800 WEST PARK DRIVE, SUITE 250
                        WESTBOROUGH, MASSACHUSETTS 01581
                         ATTENTION: INVESTOR RELATIONS
                            TELEPHONE (508) 870-6700

                                       141
<PAGE>   149

                         INDEX TO FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
ARCH COMMUNICATIONS GROUP, INC. AND SUBSIDIARIES
Report of Independent Public Accountants....................   F-2
Consolidated Balance Sheets as of December 31, 1998 and
  1999......................................................   F-3
Consolidated Statements of Operations for Each of the Three
  Years in the Period Ended December 31, 1999...............   F-4
Consolidated Statements of Stockholders' Equity (Deficit)
  for Each of the Three Years in the Period Ended December
  31, 1999..................................................   F-5
Consolidated Statements of Cash Flows for Each of the Three
  Years in the Period Ended December 31, 1999...............   F-6
Notes to Consolidated Financial Statements..................   F-7

INTERIM FINANCIAL STATEMENTS (UNAUDITED):
Consolidated Condensed Balance Sheets as of December 31,
  1999 and June 30, 2000....................................  F-23
Consolidated Condensed Statements of Operations for Three
  and Six Months Ended June 30, 1999 and 2000...............  F-24
Consolidated Condensed Statements of Cash Flows for Six
  Months Ended June 30, 1999 and 2000.......................  F-25
Notes to Consolidated Condensed Financial Statements........  F-26

PAGING NETWORK, INC. AND SUBSIDIARIES
Report of Independent Auditors..............................  F-28
Consolidated Balance Sheets as of December 31, 1998 and
  1999......................................................  F-29
Consolidated Statements of Operations for Each of the Three
  Years in the Period Ended December 31, 1999...............  F-30
Consolidated Statements of Cash Flows for Each of the Three
  Years in the Period Ended December 31, 1999...............  F-31
Consolidated Statements of Shareowners' Deficit for each of
  the Three Years in the Period Ended December 31, 1999.....  F-32
Notes to Consolidated Financial Statements..................  F-33

INTERIM FINANCIAL STATEMENTS (UNAUDITED):
Consolidated Balance Sheets as of December 31, 1999 and June
  30, 2000..................................................  F-49
Consolidated Statements of Operations for Three and Six
  Months Ended June 30, 1999 and 2000.......................  F-50
Consolidated Statements of Cash Flows for Six Months Ended
  June 30, 1999 and 2000....................................  F-51
Notes to Consolidated Financial Statements..................  F-52

MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES
Report of Independent Auditors..............................  F-57
Consolidated Balance Sheets as of December 31, 1997 and 1998
  and March 31, 1999 (unaudited)............................  F-58
Consolidated Statements of Operations for Each of the Three
  Years in the Period Ended December 31, 1998 and for the
  Three Months Ended March 31, 1998 and 1999 (unaudited)....  F-59
Consolidated Statement of Changes in Stockholders' Equity
  (Deficit) for Each of the Three Years in the Period Ended
  December 31, 1998 and for the Three Months Ended March 31,
  1999 (unaudited)..........................................  F-60
Consolidated Statements of Cash Flows for Each of the Three
  Years in the Period Ended December 31, 1998 and for the
  Three Months Ended March 31, 1998 and 1999 (unaudited)....  F-61
Notes to Consolidated Financial Statements..................  F-62
</TABLE>

                                       F-1
<PAGE>   150

                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To Arch Communications Group, Inc.:

     We have audited the accompanying consolidated balance sheets of Arch
Communications Group, Inc. (a Delaware corporation) (the "Company") and
subsidiaries as of December 31, 1998 and 1999, and the related consolidated
statements of operations, stockholders' equity (deficit) and cash flows for each
of the three years in the period ended December 31, 1999. These consolidated
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these consolidated financial
statements based on our audits.

     We conducted our audits in accordance with auditing standards generally
accepted in the United States. Those standards require that we plan and perform
the audit to obtain reasonable assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. An
audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

     In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the consolidated financial position of
Arch Communications Group, Inc. and subsidiaries as of December 31, 1998 and
1999, and the results of their operations and their cash flows for each of the
three years in the period ended December 31, 1999, in conformity with accounting
principles generally accepted in the United States.

                                                 /s/ ARTHUR ANDERSEN LLP

Boston, Massachusetts
February 16, 2000 (except with respect to the matters discussed
  in Note 3 as to which the date is March 16, 2000)

                                       F-2
<PAGE>   151

                        ARCH COMMUNICATIONS GROUP, INC.

                          CONSOLIDATED BALANCE SHEETS
                      (IN THOUSANDS, EXCEPT SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                                   DECEMBER 31,
                                                              -----------------------
                                                                 1998         1999
                                                              ----------   ----------
<S>                                                           <C>          <C>
                                       ASSETS
Current assets:
     Cash and cash equivalents..............................  $    1,633   $    3,161
     Accounts receivable (less reserves of $6,583 and
      $16,473 in 1998 and 1999, respectively)...............      30,753       61,167
     Inventories............................................      10,319        9,101
     Prepaid expenses and other.............................       8,007       11,874
                                                              ----------   ----------
          Total current assets..............................      50,712       85,303
                                                              ----------   ----------
Property and equipment, at cost:
     Land, buildings and improvements.......................      10,480       20,503
     Messaging and computer equipment.......................     400,312      667,820
     Furniture, fixtures and vehicles.......................      17,381       26,321
                                                              ----------   ----------
                                                                 428,173      714,644
     Less accumulated depreciation and amortization.........     209,128      314,445
                                                              ----------   ----------
     Property and equipment, net............................     219,045      400,199
                                                              ----------   ----------
Intangible and other assets (less accumulated amortization
  of $372,122 and $515,195 in 1998 and 1999,
  respectively).............................................     634,528      867,543
                                                              ----------   ----------
                                                              $  904,285   $1,353,045
                                                              ==========   ==========

                   LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
Current liabilities:
     Current maturities of long-term debt...................  $    1,250   $    8,060
     Accounts payable.......................................      25,683       30,016
     Accrued restructuring charges..........................      11,909       17,111
     Accrued expenses.......................................      11,689       43,629
     Accrued interest.......................................      20,997       30,294
     Customer deposits......................................       4,528        7,526
     Deferred revenue.......................................      10,958       28,175
                                                              ----------   ----------
          Total current liabilities.........................      87,014      164,811
                                                              ----------   ----------
Long-term debt, less current maturities.....................   1,001,224    1,322,508
                                                              ----------   ----------
Other long-term liabilities.................................      29,510       83,285
                                                              ----------   ----------
Commitments and contingencies
Stockholders' equity (deficit):
     Preferred stock--$.01 par value, authorized 10,000,000
      shares; issued 250,000 shares (aggregate liquidation
      preference of $26,030 and $28,176 in 1998 and 1999,
      respectively).........................................           3            3
     Common stock--$.01 par value, authorized 65,000,000
      shares, issued and outstanding: 7,071,861 and
      47,263,500 shares in 1998 and 1999, respectively......          71          472
     Class B common stock--$.01 par value, authorized
      10,000,000 shares; issued and outstanding: no shares
      in 1998 and 3,968,164 shares in 1999..................          --           40
     Additional paid-in capital.............................     378,218      661,413
     Accumulated deficit....................................    (591,755)    (879,487)
                                                              ----------   ----------
          Total stockholders' equity (deficit)..............    (213,463)    (217,559)
                                                              ----------   ----------
                                                              $  904,285   $1,353,045
                                                              ==========   ==========
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.
                                       F-3
<PAGE>   152

                        ARCH COMMUNICATIONS GROUP, INC.

                     CONSOLIDATED STATEMENTS OF OPERATIONS
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                                YEARS ENDED DECEMBER 31,
                                                           -----------------------------------
                                                             1997        1998         1999
                                                           ---------   ---------   -----------
<S>                                                        <C>         <C>         <C>
Service, rental and maintenance revenues.................  $ 351,944   $ 371,154   $   591,389
Product sales............................................     44,897      42,481        50,435
                                                           ---------   ---------   -----------
          Total revenues.................................    396,841     413,635       641,824
Cost of products sold....................................    (29,158)    (29,953)      (34,954)
                                                           ---------   ---------   -----------
                                                             367,683     383,682       606,870
                                                           ---------   ---------   -----------
Operating expenses:
     Service, rental and maintenance.....................     79,836      80,782       132,400
     Selling.............................................     51,474      49,132        84,249
     General and administrative..........................    106,041     112,181       180,726
     Depreciation and amortization.......................    232,347     221,316       309,434
     Restructuring charge................................         --      14,700        (2,200)
                                                           ---------   ---------   -----------
          Total operating expenses.......................    469,698     478,111       704,609
                                                           ---------   ---------   -----------
Operating income (loss)..................................   (102,015)    (94,429)      (97,739)
Interest expense.........................................    (96,482)   (104,019)     (144,924)
Interest income..........................................        904       1,766         1,896
Other expense............................................     (1,581)     (1,960)      (45,221)
Equity in loss of affiliate..............................     (3,872)     (5,689)       (3,200)
                                                           ---------   ---------   -----------
Income (loss) before income tax benefit, extraordinary
  items and accounting change............................   (203,046)   (204,331)     (289,188)
Benefit from income taxes................................     21,172          --            --
                                                           ---------   ---------   -----------
Income (loss) before extraordinary items and
  accounting change......................................   (181,874)   (204,331)     (289,188)
Extraordinary gain (loss) from early extinguishment of
  debt...................................................         --      (1,720)        6,963
Cumulative effect of accounting change...................         --          --        (3,361)
                                                           ---------   ---------   -----------
Net income (loss)........................................   (181,874)   (206,051)     (285,586)
Accretion of redeemable preferred stock..................        (32)         --            --
Preferred stock dividend.................................         --      (1,030)       (2,146)
                                                           ---------   ---------   -----------
Net income (loss) applicable to common stockholders......  $(181,906)  $(207,081)  $  (287,732)
                                                           =========   =========   ===========
Basic/diluted income (loss) per common share before
  extraordinary item and accounting change...............  $  (26.31)  $  (29.34)  $     (9.21)
Extraordinary gain (loss) from early extinguishment of
  debt per basic/diluted common share....................         --       (0.25)         0.22
Cumulative effect of accounting change per basic/diluted
  common share...........................................         --          --         (0.11)
                                                           ---------   ---------   -----------
Basic/diluted net income (loss) per common share.........  $  (26.31)  $  (29.59)  $     (9.10)
                                                           =========   =========   ===========
Basic/diluted weighted average number of common shares
  outstanding............................................  6,915,413   6,997,730    31,603,410
                                                           =========   =========   ===========
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.
                                       F-4
<PAGE>   153

                        ARCH COMMUNICATIONS GROUP, INC.

           CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)
                      (IN THOUSANDS, EXCEPT SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                                                                      TOTAL
                                                             CLASS B   ADDITIONAL                 STOCKHOLDERS'
                                        PREFERRED   COMMON   COMMON     PAID-IN     ACCUMULATED      EQUITY
                                          STOCK     STOCK     STOCK     CAPITAL       DEFICIT       (DEFICIT)
                                        ---------   ------   -------   ----------   -----------   -------------
<S>                                     <C>         <C>      <C>       <C>          <C>           <C>
Balance, December 31, 1996............    $ --       $ 70     $ --      $350,581     $(202,800)     $ 147,851
     Issuance of 50,447 shares of
       common stock under Arch's
       employee stock purchase plan...      --         --       --           800            --            800
     Accretion of redeemable preferred
       stock..........................      --         --       --           (32)           --            (32)
     Net loss.........................      --         --       --            --      (181,874)      (181,874)
                                          ----       ----     ----      --------     ---------      ---------
Balance, December 31, 1997............      --         70       --       351,349      (384,674)       (33,255)
     Exercise of options to purchase
       31,344 shares of common
       stock..........................      --         --       --           294            --            294
     Issuance of 250,000 shares of
       preferred stock................       3         --       --        24,997            --         25,000
     Issuance of 85,996 shares of
       common stock under Arch's
       employee stock purchase plan...      --          1       --           548            --            549
     Preferred stock dividend.........      --         --       --         1,030        (1,030)            --
     Net loss.........................      --         --       --            --      (206,051)      (206,051)
                                          ----       ----     ----      --------     ---------      ---------
Balance, December 31, 1998............       3         71       --       378,218      (591,755)      (213,463)
     Issuance of 30,847,004 shares of
       common stock and 5,360,261 of
       Class B common stock in rights
       offering.......................      --        308       54       216,881            --        217,243
     Issuance of 4,781,656 shares of
       common stock to acquire
       company........................      --         48       --        20,035            --         20,083
     Shares to be issued in connection
       with the Benbow settlement.....      --         --       --        22,836            --         22,836
     Issuance of 3,136,665 shares of
       common stock in exchange for
       debt...........................      --         31       --        21,106            --         21,137
     Issuance of 34,217 shares of
       common stock under Arch's
       employee stock purchase plan...      --         --       --           191            --            191
     Conversion of Class B common
       stock into common stock........      --         14      (14)           --            --             --
     Preferred stock dividend.........      --         --       --         2,146        (2,146)            --
     Net loss.........................      --         --       --            --      (285,586)      (285,586)
                                          ----       ----     ----      --------     ---------      ---------
Balance, December 31, 1999............    $  3       $472     $ 40      $661,413     $(879,487)     $(217,559)
                                          ====       ====     ====      ========     =========      =========
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.
                                       F-5
<PAGE>   154

                        ARCH COMMUNICATIONS GROUP, INC.

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                YEARS ENDED DECEMBER 31,
                                                            ---------------------------------
                                                              1997        1998        1999
                                                            ---------   ---------   ---------
<S>                                                         <C>         <C>         <C>
Cash flows from operating activities:
     Net income (loss)....................................  $(181,874)  $(206,051)  $(285,586)
     Adjustments to reconcile net income (loss) to net
       cash provided by operating activities:
     Depreciation and amortization........................    232,347     221,316     309,434
     Deferred income tax benefit..........................    (21,172)         --          --
     Extraordinary loss (gain) from early extinguishment
       of debt............................................         --       1,720      (6,963)
     Cumulative effect of accounting change...............         --          --       3,361
     Equity in loss of affiliate..........................      3,872       5,689       3,200
     Accretion of discount on senior notes................     33,259      37,115      41,566
     Other non-cash interest expense......................         --          --       2,904
     Gain on Tower Site Sale..............................         --      (1,859)     (1,871)
     Write-off of N-PCS investments.......................         --          --      37,498
     Accounts receivable loss provision...................      7,181       8,545      15,265
     Changes in assets and liabilities, net of effect from
       acquisition of company:
          Accounts receivable.............................    (11,984)     (9,151)    (18,369)
          Inventories.....................................     (2,394)      2,314       1,728
          Prepaid expenses and other......................       (386)     (3,090)      7,000
          Accounts payable and accrued expenses...........      3,683      24,649      (2,986)
          Customer deposits and deferred revenue..........      1,058         549      (7,554)
          Other long-term liabilities.....................         --       1,634         909
                                                            ---------   ---------   ---------
Net cash provided by operating activities.................     63,590      83,380      99,536
                                                            ---------   ---------   ---------
Cash flows from investing activities:
     Additions to property and equipment, net.............    (87,868)    (79,249)    (95,208)
     Additions to intangible and other assets.............    (14,901)    (33,935)    (18,443)
     Net proceeds from tower site sale....................         --      30,316       3,046
     Acquisition of company, net of cash acquired.........         --          --    (516,561)
                                                            ---------   ---------   ---------
Net cash used for investing activities....................   (102,769)    (82,868)   (627,166)
                                                            ---------   ---------   ---------
Cash flows from financing activities:
     Issuance of long-term debt...........................     91,000     460,964     473,783
     Repayment of long-term debt..........................    (49,046)   (489,014)   (162,059)
     Repayment of redeemable preferred stock..............     (3,744)         --          --
     Net proceeds from sale of preferred stock............         --      25,000          --
     Net proceeds from sale of common stock...............        800         843     217,434
                                                            ---------   ---------   ---------
Net cash provided by (used in) financing activities.......     39,010      (2,207)    529,158
                                                            ---------   ---------   ---------
Net (decrease) increase in cash and cash equivalents......       (169)     (1,695)      1,528
Cash and cash equivalents, beginning of period............      3,497       3,328       1,633
                                                            ---------   ---------   ---------
Cash and cash equivalents, end of period..................  $   3,328   $   1,633   $   3,161
                                                            =========   =========   =========
Supplemental disclosure:
     Interest paid........................................  $  62,231   $  57,151   $  91,151
                                                            =========   =========   =========
     Issuance of common stock for debt....................  $      --   $      --   $  21,137
                                                            =========   =========   =========
     Issuance of common stock for acquisition of
       company............................................  $      --   $      --   $  20,083
                                                            =========   =========   =========
     Liabilities assumed in acquisition of company........  $      --   $      --   $ 134,429
                                                            =========   =========   =========
     Preferred stock dividend.............................  $      --   $   1,030   $   2,146
                                                            =========   =========   =========
     Accretion of redeemable preferred stock..............  $      32   $      --   $      --
                                                            =========   =========   =========
</TABLE>

  The accompanying notes are an integral part of these consolidated financial
                                  statements.
                                       F-6
<PAGE>   155

                        ARCH COMMUNICATIONS GROUP, INC.

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.  ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

     Organization--Arch Communications Group, Inc. ("Arch" or the "Company") is
a leading provider of wireless messaging services.

     Principles of Consolidation--The accompanying consolidated financial
statements include the accounts of the Company and its wholly-owned
subsidiaries. All significant intercompany accounts and transactions have been
eliminated in consolidation.

     Revenue Recognition--Arch recognizes revenue under rental and service
agreements with customers as the related services are performed. Maintenance
revenues and related costs are recognized ratably over the respective terms of
the agreements. Sales of equipment are recognized upon delivery. Commissions are
recognized as an expense when incurred. The Securities and Exchange Commission
released Staff Accounting Bulletin (SAB) No. 101, "Revenue Recognition in
Financial Statements", on December 3, 1999. This SAB provides additional
guidance on the accounting for revenue recognition, including both broad
conceptual discussions as well as certain industry-specific guidance. The
guidance is effective for the second quarter of fiscal 2000. Arch does not
expect SAB 101 to have a material impact on its results of operations upon
adoption.

     Use of Estimates--The preparation of financial statements in conformity
with generally accepted accounting principles requires management to make
estimates and assumptions that affect the reported amounts of assets and
liabilities and disclosure of contingent assets and liabilities at the date of
the financial statements and the reported amounts of revenues and expenses
during the reporting period. Actual results could differ from those estimates.

     Cash Equivalents--Cash equivalents include short-term, interest-bearing
instruments purchased with remaining maturities of three months or less. The
carrying amount approximates fair value due to the relatively short period to
maturity of these instruments.

     Inventories--Inventories consist of new messaging devices which are held
primarily for resale. Inventories are stated at the lower of cost or market,
with cost determined on a first-in, first-out basis.

     Property and Equipment--Leased messaging devices sold or otherwise retired
are removed from the accounts at their net book value using the first-in,
first-out method. Property and equipment is stated at cost and is depreciated
using the straight-line method over the following estimated useful lives:

<TABLE>
<CAPTION>
                                                               ESTIMATED
ASSET CLASSIFICATION                                          USEFUL LIFE
--------------------                                          -----------
<S>                                                           <C>
Buildings and improvements.................................    20 Years
Leasehold improvements.....................................   Lease Term
Messaging devices..........................................    3 Years
Messaging and computer equipment...........................   5-8 Years
Furniture and fixtures.....................................   5-8 Years
Vehicles...................................................    3 Years
</TABLE>

     Depreciation and amortization expense related to property and equipment
totaled $108.0 million, $101.1 million and $144.9 million for the years ended
December 31, 1997, 1998 and 1999, respectively.

                                       F-7
<PAGE>   156
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Intangible and Other Assets--Intangible and other assets, net of
accumulated amortization, are composed of the following (in thousands):

<TABLE>
<CAPTION>
                                                         DECEMBER 31,
                                                      -------------------
                                                        1998       1999
                                                      --------   --------
<S>                                                   <C>        <C>
Purchased Federal Communications Commission
  licenses..........................................  $256,519   $354,246
Goodwill............................................   271,808    249,010
Purchased subscriber lists..........................    56,825    239,114
Deferred financing costs............................    22,072     19,915
N-PCS investments...................................    17,847         --
Other...............................................     9,457      5,258
                                                      --------   --------
                                                      $634,528   $867,543
                                                      ========   ========
</TABLE>

     Amortization expense related to intangible and other assets totaled $124.3
million, $120.2 million and $164.6 million for the years ended December 31,
1997, 1998 and 1999, respectively.

     Subscriber lists, Federal Communications Commission licenses and goodwill
are amortized over their estimated useful lives, ranging from five to ten years
using the straight-line method. Non-competition agreements are amortized over
the terms of the agreements using the straight-line method. Other assets consist
of contract rights, organizational and Federal Communications Commission
application and development costs which are amortized using the straight-line
method over their estimated useful lives, not exceeding ten years.

     In April 1998, the Accounting Standards Executive Committee of the
Financial Accounting Standards Board issued Statement of Position (SOP) 98-5
"Reporting on the Costs of Start-Up Activities." SOP 98-5 requires costs of
start-up activities and organization costs to be expensed as incurred.
Development and start up costs include nonrecurring, direct costs incurred in
the development and expansion of messaging systems. Arch adopted SOP 98-5
effective January 1, 1999. Initial application of SOP 98-5 resulted in a $3.4
million charge, which was reported as the cumulative effect of a change in
accounting principle. This charge represents the unamortized portion of start-up
and organization costs, which had been deferred in prior years.

     Deferred financing costs incurred in connection with Arch's credit
agreements (see Note 3) are being amortized over periods not to exceed the terms
of the related agreements. As credit agreements are amended and restated,
unamortized deferred financing costs are written off as an extraordinary charge.
During 1998, a charge of $1.7 million was recognized in connection with the
closing of a new credit facility.

     In accordance with Statement of Financial Accounting Standards (SFAS) No.
121 "Accounting for the Impairment of Long-Lived Assets and Long-Lived Assets To
Be Disposed Of" Arch evaluates the recoverability of its carrying value of the
Company's long-lived assets and certain intangible assets based on estimated
undiscounted cash flows to be generated from each of such assets compared to the
original estimates used in measuring the assets. To the extent impairment is
identified, Arch reduces the carrying value of such impaired assets to fair
value based on estimated discounted future cash flows. To date, Arch has not had
any such impairments except as described below.

     N-PCS Investments--In connection with Arch's May 1996 acquisition of
Westlink Holdings, Inc., Arch acquired Westlink's 49.9% share of the capital
stock of Benbow PCS Ventures, Inc. Benbow holds exclusive rights to a 50kHz
outbound/12.5kHz inbound narrowband personal communications services license in
each of the five regions of the United States. Arch was formerly obligated to
advance Benbow sufficient funds to service debt obligations incurred by Benbow
in connection with its acquisition of its narrowband PCS licenses and to finance
construction of a narrowband PCS system unless funds were available to Benbow
from other sources. This obligation was subject to the approval of Arch's
designee on

                                       F-8
<PAGE>   157
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

Benbow's board of directors. Arch's investment in Benbow was accounted for under
the equity method whereby Arch's share of Benbow's losses, since the acquisition
date of Westlink, are recognized in Arch's accompanying consolidated statements
of operations under the caption equity in loss of affiliate.

     In June 1999, Arch, Benbow and Benbow's controlling stockholder, agreed
that:

     - the shareholders agreement, the management agreement and the employment
       agreement governing the establishment and operation of Benbow will be
       terminated;

     - Benbow will not make any further Federal Communications Commission
       payments and will not pursue construction of a narrowband PCS system;

     - Arch will not be obligated to fund Federal Communications Commission
       payments or construction of a narrowband PCS system by Benbow;

     - the parties will seek Federal Communications Commission approval of the
       forgiveness of Benbow's remaining payment obligations and the transfer of
       the controlling stockholder's equity interest in Benbow to Arch;

     - the closing of the transaction will occur on the earlier of January 23,
       2001 or receipt of Federal Communications Commission approval;

     - Arch will pay the controlling stockholder, in installments, an aggregate
       amount of $3.5 million (if the transaction closes before January 23,
       2001) or $3.8 million (if the transaction closes on January 23, 2001).

     As a result of these arrangements, Benbow will not have any meaningful
business operations and is unlikely to retain its narrowband personal
communications services licenses. Therefore, Arch has written off substantially
all of its investment in Benbow in the amount of $8.2 million. Arch has also
accrued the payment to the controlling stockholder of $3.8 million and legal and
other expenses of approximately $1.0 million which is included in accrued
expenses. In addition, Arch guaranteed Benbow's obligations in conjunction with
Benbow's June 1998 purchase of the stock of PageCall. Since it is unlikely that
Benbow will be able to meet these obligations and Arch is currently required to
settle the obligation in its stock, Arch has recorded the issuance of $22.8
million of its common stock in additional paid-in capital and as a charge to
operations, to satisfy the obligation in April 2000.

     On November 8, 1994, CONXUS Communications, Inc. was successful in
acquiring the rights to an interactive messaging license in five designated
regions in the United States in the Federal Communications Commission narrowband
wireless spectrum auction. On May 18, 1999, CONXUS filed for Chapter 11
protection in the U.S. Bankruptcy Court in Delaware, which case was converted to
a case under Chapter 7 on August 17, 1999. In June 1999, Arch wrote-off its $6.5
million investment in CONXUS. On November 3, 1999, in order to document its
disposition of any interest it has, if any, in CONXUS, Arch offered to transfer
to CONXUS its shares in CONXUS for no consideration. Which was accepted by the
Chapter 7 trustee on December 9, 1999.

     All of the above charges, totaling $42.3 million, are included in other
expense in 1999 in the accompanying statement of operations.

     Fair Value of Financial Instruments--Arch's financial instruments, as
defined under SFAS No. 107 "Disclosures about Fair Value of Financial
Instruments", include its cash, its debt financing and interest rate protection
agreements. The fair value of cash is equal to the carrying value at December
31, 1998 and 1999.

     As discussed in Note 3, Arch's debt financing primarily consists of (1)
senior bank debt, (2) fixed rate senior notes and (3) convertible subordinated
debentures. Arch considers the fair value of senior bank

                                       F-9
<PAGE>   158
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

debt to be equal to the carrying value since the related facilities bear a
current market rate of interest. Arch's fixed rate senior notes are traded
publicly. The following table depicts the fair value of the fixed rate senior
notes and the convertible subordinated debentures based on the current market
quote as of December 31, 1998 and 1999 (in thousands):

<TABLE>
<CAPTION>
                                   DECEMBER 31, 1998       DECEMBER 31, 1999
                                 ---------------------   ---------------------
                                 CARRYING                CARRYING
                                 --------                --------
DESCRIPTION                       VALUE     FAIR VALUE    VALUE     FAIR VALUE
-----------                       -----     ----------    -----     ----------
<S>                              <C>        <C>          <C>        <C>
10 7/8% Senior Discount Notes
  due 2008.....................  $369,506    $221,704    $393,917    $173,323
9 1/2% Senior Notes due 2004...   125,000     112,500     125,000      95,000
14% Senior Notes due 2004......   100,000     103,000     100,000      83,000
12 3/4% Senior Notes due
  2007.........................   127,604     127,604     127,887     101,030
13 3/4% Senior Notes due
  2008.........................        --          --     140,365     113,685
6 3/4% Convertible Subordinated
  Debentures due 2003..........    13,364       6,682       4,459       1,812
</TABLE>

     Arch had off-balance-sheet interest rate protection agreements consisting
of interest rate swaps and interest rate caps with notional amounts of $265.0
million and $40.0 million, respectively, at December 31, 1998 and $107.0 million
and $10.0 million, respectively, at December 31, 1999. The cost to terminate the
outstanding interest rate swaps and interest rate caps at December 31, 1998 and
1999 would have been $6.4 million and $4.5 million, respectively. See Note 3.

     Basic/Diluted Net Income (Loss) Per Common Share--On June 28, 1999, Arch
effected a one for three reverse stock split. All share and per share data for
all periods presented have been adjusted to give effect to this reverse split.

     In February 1997, the Financial Accounting Standards Board issued SFAS No.
128 "Earnings Per Share." The Company adopted this standard in 1997. The
adoption of this standard did not have an effect on the Company's financial
position, results of operations or income (loss) per share. Basic net income
(loss) per common share is based on the weighted average number of common shares
outstanding. Shares of stock issuable pursuant to stock options and upon
conversion of the subordinated debentures (see Note 3) or the Series C Preferred
Stock (see Note 4) have not been considered, as their effect would be
anti-dilutive and thus diluted net income (loss) per common share is the same as
basic net income (loss) per common share.

     In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards (SFAS) No. 133 "Accounting for Derivative
Instruments and Hedging Activities." SFAS No. 133 requires that every derivative
instrument be recorded in the balance sheet as either an asset or liability
measured at its fair value and that changes in the derivative's fair value be
recognized in earnings. Arch intends to adopt this standard effective January 1,
2001. Arch has not yet quantified the impact of adopting SFAS No. 133 on its
financial statements; however, adopting SFAS No. 133 could increase volatility
in earnings and other comprehensive income.

     Reclassifications--Certain amounts of prior periods were reclassified to
conform with the 1999 presentation.

2.  ACQUISITIONS

     On June 3, 1999 Arch completed its acquisition of MobileMedia
Communications, Inc. for $671.1 million, consisting of cash paid of $516.6
million, including direct transaction costs, 4,781,656 shares of Arch common
stock valued at $20.1 million and the assumption of liabilities of $134.4
million. The cash payments were financed through the issuance of approximately
36.2 million shares of Arch common stock (including approximately 5.4 million
shares of Arch Class B common

                                      F-10
<PAGE>   159
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

shares) in a rights offering for $6.00 per share, the issuance of $147.0 million
principal amount of 13 3/4% senior notes due 2008 (see Note 3) and additional
borrowings under the Company's credit facility.

     Arch issued to four unsecured creditors, who had agreed to act as standby
purchasers and to purchase shares not purchased by other unsecured creditors in
the rights offering, warrants to acquire 1,225,219 shares of its common stock on
or before September 1, 2001 for $9.03 per share. The fair value of these
warrants was determined to be immaterial.

     The purchase price was allocated based on the fair values of assets
acquired and liabilities assumed. The acquisition has been accounted for as a
purchase, and the results of MobileMedia's operations have been included in the
consolidated financial statements from the date of the acquisition. Goodwill
resulting from the acquisition is being amortized over a ten-year period using
the straight-line method.

     The liabilities assumed, referred to above, include an unfavorable lease
accrual related to MobileMedia's rentals on communications towers which were in
excess of market rental rates. This accrual amounted to approximately $52.9
million and is included in other long-term liabilities. This accrual will be
amortized over the remaining lease term of 13 3/4 years. Concurrent with the
consummation of the acquisition, Arch commenced the development of a plan to
integrate the operations of MobileMedia. The liabilities assumed, referred to
above, also includes a $14.5 million restructuring accrual to cover the costs to
eliminate redundant headcount and facilities in connection with the overall
integration of operations (see Note 9).

     The following unaudited pro forma summary presents the consolidated results
of operations as if the acquisition had occurred at the beginning of the period
presented, after giving effect to certain adjustments, including depreciation
and amortization of acquired assets and interest expense on acquisition debt.
These pro forma results have been prepared for comparative purposes only and do
not purport to be indicative of what would have occurred had the acquisition
been completed at the beginning of the period presented, or of results that may
occur in the future.

<TABLE>
<CAPTION>
                                                    YEAR ENDED           YEAR ENDED
                                                DECEMBER 31, 1998    DECEMBER 31, 1999
                                                -----------------    -----------------
                                                (UNAUDITED AND IN THOUSANDS EXCEPT FOR
                                                          PER SHARE AMOUNTS)
<S>                                             <C>                  <C>
Revenues......................................      $ 854,862            $ 817,686
Income (loss) before extraordinary item.......       (193,151)            (316,590)
Net income (loss).............................       (194,871)            (309,627)
Basic/diluted net income (loss) per common
  share.......................................          (4.09)               (6.39)
</TABLE>

     Pending Acquisition--In November 1999, Arch signed a definitive agreement
with Paging Network, Inc. (PageNet) pursuant to which PageNet will merge with a
wholly-owned subsidiary of Arch. Each outstanding share of PageNet common stock
will be converted into 0.1247 share of Arch common stock in the merger.

     Under the merger agreement, PageNet is required to make an exchange offer
of PageNet common stock to holders of its outstanding 8.875% senior subordinated
notes due 2006, its 10.125% senior subordinated notes due 2007 and its 10%
senior subordinated notes due 2008 (collectively, the "PageNet Notes"), having
an aggregate outstanding principal amount of $1.2 billion. Under the PageNet
exchange offer, an aggregate of 616,830,757 shares of PageNet common stock,
together with 68.9% of the equity interest in PageNet's subsidiary, Vast
Solutions, would be exchanged for all of the PageNet Notes, in the aggregate. In
connection with the Merger, PageNet would distribute to its stockholders (other
than holders who received shares in the PageNet exchange offer), 11.6% of the
equity interests in Vast Solutions. After the merger, PageNet would retain a
19.5% equity interest in Vast Solutions.

     Under the merger agreement Arch is required to make an exchange offer of up
to 29,651,984 shares of its common stock (in the aggregate) for all of its
10 7/8% senior discount notes due 2008.

                                      F-11
<PAGE>   160
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Arch expects the merger, which has been approved by the boards of directors
of Arch and PageNet, but is subject to regulatory review, shareholder approval,
other third-party consents and the completion of the exchange offers and
preferred stock conversion, to be completed in the second or third quarter of
2000. Each of the PageNet exchange offer and the Arch exchange offer is
conditioned upon acceptance by the holders of 97.5% of the PageNet Notes and the
Arch senior discount notes, respectively, subject to reduction under specified
circumstances.

     The merger agreement provides that under certain circumstances a fee may be
payable by Arch or PageNet upon termination of the agreement. These
circumstances include withdrawal of the recommendation or approval of the merger
agreement or the merger by the Arch or PageNet board of directors, the failure
of shareholders or noteholders to approve the transaction or exchange followed
by the making of an alternative proposal and Arch or PageNet entering into an
agreement with a third party within 12 months of such termination, and PageNet's
failure to file a prepackaged bankruptcy plan in certain circumstances. The
termination fee payable by Arch or PageNet under the merger agreement is $40.0
million.

     The merger agreement provides that either party may terminate the
agreement, without paying the above fee, if the merger is not consummated by
June 30, 2000. This termination date is subject to extension for 90 days for
regulatory approval and is subject to extension to as late as December 31, 2000
under certain circumstances where PageNet files for protection under the U.S.
Bankruptcy Code.

3.  LONG-TERM DEBT

     Long-term debt consisted of the following:

<TABLE>
<CAPTION>
                                                            DECEMBER 31,
                                                       -----------------------
                                                          1998         1999
                                                       ----------   ----------
                                                           (IN THOUSANDS)
<S>                                                    <C>          <C>
Senior Bank Debt.....................................  $  267,000   $  438,940
10 7/8% Senior Discount Notes due 2008...............     369,506      393,917
9 1/2% Senior Notes due 2004.........................     125,000      125,000
14% Senior Notes due 2004............................     100,000      100,000
12 3/4% Senior Notes due 2007........................     127,604      127,887
13 3/4% Senior Notes due 2008........................          --      140,365
Convertible Subordinated Debentures..................      13,364        4,459
                                                       ----------   ----------
                                                        1,002,474    1,330,568
Less -- Current maturities...........................       1,250        8,060
                                                       ----------   ----------
Long-term debt.......................................  $1,001,224   $1,322,508
                                                       ==========   ==========
</TABLE>

     Senior Bank Debt--The Company, through its operating subsidiary, Arch
Paging, Inc. (API) has a senior credit facility in the current amount of $577.9
million consisting of (i) a $175.0 million reducing revolving tranche A
facility, (ii) a $100.0 million tranche B term loan and (iii) a $302.9 million
tranche C term loan.

     The tranche A facility will be reduced on a quarterly basis commencing on
September 30, 2000 and will mature on June 30, 2005. The tranche B term loan
will be amortized in quarterly installments commencing September 30, 2000, with
an ultimate maturity date of June 30, 2005. The tranche C term loan began
amortizing in annual installments on December 31, 1999, with an ultimate
maturity date of June 30, 2006.

     API's obligations under the senior credit facility are secured by its
pledge of its interests in certain of its operating subsidiaries. The senior
credit facility is guaranteed by Arch and certain of Arch's operating
subsidiaries. Arch's guarantee is secured by a pledge of Arch's stock and notes
in its wholly-owned

                                      F-12
<PAGE>   161
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

subsidiary Arch Communications Inc. (ACI), and the guarantees of the operating
subsidiaries are secured by a security interest in certain assets of those
operating subsidiaries.

     Borrowings under the senior credit facility bear interest based on a
reference rate equal to either the agent bank's alternate base rate or LIBOR, in
each case plus a margin based on specified ratios of debt to annualized earnings
before interest, taxes, depreciation and amortization (EBITDA).

     The senior credit facility requires payment of fees on the daily average
amount available to be borrowed under the tranche A facility. These fees vary
depending on specified ratios of total debt to annualized EBITDA.

     The senior credit facility requires that at least 50% of total ACI debt,
including outstanding borrowings under the senior credit facility, be subject to
a fixed interest rate or interest rate protection agreements. Entering into
interest rate protection agreements involves both the credit risk of dealing
with counterparties and their ability to meet the terms of the contracts and
interest rate risk. In the event of nonperformance by the counterparty to these
interest rate protection agreements, Arch would be subject to the prevailing
interest rates specified in the senior credit facility.

     Under the interest rate swap agreements, the Company will pay the
difference between LIBOR and the fixed swap rate if the swap rate exceeds LIBOR,
and the Company will receive the difference between LIBOR and the fixed swap
rate if LIBOR exceeds the swap rate. Settlement occurs on the quarterly reset
dates specified by the terms of the contracts. No interest rate swaps on the
senior credit facility were outstanding at December 31, 1999. At December 31,
1998, the Company had a net payable of $47,000, on the interest rate swaps.

     The interest rate cap agreements will pay the Company the difference
between LIBOR and the cap level if LIBOR exceeds the cap levels at any of the
quarterly reset dates. If LIBOR remains below the cap level, no payment is made
to the Company. The total notional amount of the interest rate cap agreements
was $10.0 million with a cap level of 8% at December 31, 1999. The transaction
fees for these instruments are being amortized over the terms of the agreements.

     The senior credit facility contains restrictions that limit, among other
things, Arch's operating subsidiaries' ability to:

     - declare dividends or redeem or repurchase capital stock;

     - prepay, redeem or purchase debt;

     - incur liens and engage in sale/leaseback transactions;

     - make loans and investments;

     - incur indebtedness and contingent obligations;

     - amend or otherwise alter debt instruments and other material agreements;

     - engage in mergers, consolidations, acquisitions and asset sales;

     - alter its lines of business or accounting methods.

     In addition, the senior credit facility requires Arch and its subsidiaries
to meet certain financial covenants, including ratios of EBITDA to fixed
charges, EBITDA to debt service, EBITDA to interest service and total
indebtedness to EBITDA. As of December 31, 1999, Arch and its operating
subsidiaries were in compliance with the covenants of the senior credit
facility.

                                      F-13
<PAGE>   162
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     As of December 31, 1999, $438.9 million was outstanding and $139.0 million
was available under the senior credit facility. At December 31, 1999, such
advances bore interest at an average annual rate of 11.62%.

     Senior Notes--Interest on Arch's 10 7/8% senior discount notes due 2008
does not accrue prior to March 15, 2001. Commencing September 15, 2001, interest
on the senior discount notes is payable semi-annually at an annual rate of
10 7/8%. The maturity value of the senior discount notes outstanding at December
31, 1999 was $448.4 million.

     On June 3, 1999, ACI, a wholly-owned subsidiary of Arch, received the
proceeds of an offering of $147.0 million principal amount at maturity of
13 3/4% senior notes due 2008. The 13 3/4% notes were sold at an initial price
to investors of 95.091% for proceeds of $139.8 million less offering expenses of
$5.2 million. The 13 3/4% notes mature on April 15, 2008 and bear interest at a
rate of 13 3/4% per annum, payable semi-annually in arrears on April 15 and
October 15 of each year, commencing October 15, 1999.

     Interest on the 13 3/4% notes, ACI's 12 3/4% senior notes due 2007, ACI's
14% senior notes due 2004 and ACI's 9 1/2% senior notes due 2004 (collectively,
the "Senior Notes") is payable semiannually. The senior discount notes and
Senior Notes contain certain restrictive and financial covenants, which, among
other things, limit the ability of Arch or ACI to:

     - incur additional indebtedness;

     - pay dividends;

     - grant liens on its assets;

     - sell assets;

     - enter into transactions with related parties;

     - merge, consolidate or transfer substantially all of its assets;

     - redeem capital stock or subordinated debt;

     - make certain investments.

     Arch has entered into interest rate swap agreements in connection with the
ACI 14% Notes. Under the interest rate swap agreements, Arch has effectively
reduced the interest rate on the ACI 14% Notes from 14% to the fixed swap rate
of 9.45%. In the event of nonperformance by the counterparty to these interest
rate protection agreements, Arch would be subject to the 14% interest rate
specified on the notes. As of December 31, 1999, Arch had received $6.8 million
in excess of the amounts paid under the swap agreements, which is included in
other long-term liabilities in the accompanying balance sheet.

     Convertible Subordinated Debentures--The Arch convertible debentures are
convertible at their principal amount into shares of Arch common stock at any
time prior to redemption or maturity at an initial conversion price of $50.25
per share, subject to adjustment. The Arch convertible debentures are
redeemable, at the option of Arch, in whole or in part, at certain prices
declining annually to 100% of the principal amount at maturity plus accrued
interest. The Arch convertible debentures also are subject to redemption at the
option of the holders, at a price of 100% of the principal amount plus accrued
interest, upon the occurrence of certain events. The Arch convertible debentures
bear interest at a rate of 6 3/4% per annum, payable semiannually on June 1 and
December 1. The Arch convertible debentures are unsecured and are subordinated
to all existing indebtedness of Arch.

     Debt Exchanged for Equity--In October 1999, Arch completed transactions
with four bondholders in which Arch issued an aggregate of 3,136,665 shares of
Arch common stock and warrants to purchase 540,487 shares of Arch common stock
for $9.03 per share in exchange for $25.2 million accreted value of

                                      F-14
<PAGE>   163
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

debt securities. Under two of the exchange agreements, Arch issued 809,545
shares of Arch common stock and warrants to purchase 540,487 shares of Arch
common stock for $9.03 per share in exchange for $8.9 million principal amount
of Arch convertible debentures. Arch recorded $2.9 million of non-cash interest
expense in conjunction with these transactions. Under the remaining exchange
agreements, Arch issued 2,327,120 shares of Arch common stock in exchange for
$16.3 million accreted value ($19.0 million maturity value) of its senior
discount notes. Arch recorded an extraordinary gain of $7.0 million on the early
extinguishment of debt as a result of these transactions.

     In February and March 2000, Arch completed transactions in which Arch
issued an aggregate of 11,926,036 shares of Arch common stock in exchange for
approximately $160.9 million accreted value of debt securities. Under one of the
exchange agreements, Arch issued 285,715 shares of Arch common stock in exchange
for $3.5 million principal amount of Arch convertible debentures. Under the
other exchange agreements, Arch issued 11,640,321 shares of Arch common stock in
exchange for $157.4 million accreted value ($176.0 million maturity value) of
its senior discount notes.

     Maturities of Debt--Scheduled long-term debt maturities at December 31,
1999 are as follows (in thousands):

<TABLE>
<CAPTION>
YEAR ENDING DECEMBER 31,
------------------------
<S>                                                            <C>
2000........................................................   $    8,060
2001........................................................       15,560
2002........................................................       20,560
2003........................................................       30,019
2004........................................................      274,060
Thereafter..................................................      982,309
                                                               ----------
                                                               $1,330,568
                                                               ==========
</TABLE>

4.  REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY

     Redeemable Preferred Stock--In connection with the its merger with USA
Mobile Communications Holdings, Inc., Arch assumed the obligations associated
with 22,530 outstanding shares of Series A Redeemable Preferred Stock issued by
USA Mobile. The preferred stock was recorded at its accreted redemption value,
based on 10% annual accretion through the redemption date. On January 30, 1997,
all outstanding preferred stock was redeemed for $3.7 million in cash.

     Redeemable Series C Cumulative Convertible Preferred Stock--On June 29,
1998, two partnerships managed by Sandler Capital Management Company, Inc., an
investment management firm, together with certain other private investors, made
an equity investment in Arch of $25.0 million in the form of Series C
Convertible Preferred Stock of Arch. The Series C Preferred Stock: (i) is
convertible into Arch common stock at a conversion price of $16.38 per share,
subject to certain adjustments; (ii) bears dividends at an annual rate of 8.0%,
(A) payable quarterly in cash or, at Arch's option, through the issuance of
shares of Arch common stock valued at 95% of the then prevailing market price or
(B) if not paid quarterly, accumulating and payable upon redemption or
conversion of the Series C Preferred Stock or liquidation of Arch; (iii) permits
the holders after seven years to require Arch, at Arch's option, to redeem the
Series C Preferred Stock for cash or convert such shares into Arch common stock
valued at 95% of the then prevailing market price of Arch common stock; (iv) is
subject to redemption for cash or conversion into Arch common stock at Arch's
option in certain circumstances; (v) in the event of a "Change of Control" as
defined in the indenture governing the senior discount notes, requires Arch, at
its option, to redeem the Series C Preferred Stock for cash or convert such
shares into Arch common stock valued at 95% of the then prevailing market price
of Arch common stock, with such cash redemption or conversion being at a price
equal to 105% of the sum of the original purchase price plus accumulated
dividends; (vi) limits

                                      F-15
<PAGE>   164
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

certain mergers or asset sales by Arch; (vii) so long as at least 50% of the
Series C Preferred Stock remains outstanding, limits the incurrence of
indebtedness and "restricted payments" in the same manner as contained in the
senior discount notes indenture; and (viii) has certain voting and preemptive
rights. Upon an event of redemption or conversion, Arch currently intends to
convert such Series C Preferred Stock into shares of Arch common stock.

     Class B Common Stock--Shares of Arch Class B common stock are identical in
all respects to shares of Arch common stock, except that a holder of Class B
common stock is not entitled to vote in the election of directors and is
entitled to 1/100th vote per share on all other matters voted on by Arch
stockholders. Shares of class B common stock will automatically convert into an
identical number of shares of common stock upon transfer of Class B common
shares to any person or entity, other than any person or entity that received
shares of Class B common stock in the initial distribution of those shares or
any affiliate of such person or entity.

     Warrants--In connection with the acquisition of MobileMedia, Arch issued
approximately 48.3 million warrants to purchase Arch common stock. Each warrant
represents the right to purchase one-third of one share of Arch common stock at
an exercise price of $3.01 ($9.03 per share). The warrants expire on September
1, 2001.

     Stock Options--Arch has stock option plans which provide for the grant of
incentive and nonqualified stock options to key employees, directors and
consultants to purchase Arch common stock. Incentive stock options are granted
at exercise prices not less than the fair market value on the date of grant.
Options generally vest over a five-year period from the date of grant. However,
in certain circumstances, options may be immediately exercisable in full.
Options generally have a duration of 10 years. The plans provide for the
granting of options to purchase a total of 2,304,135 shares of common stock.

     On December 16, 1997, the Compensation Committee of the board of directors
of Arch authorized the Company to offer an election to its employees who had
outstanding options at a price greater than $15.19 to cancel such options and
accept new options at a lower price. In January 1998, as a result of this
election by certain of its employees, the Company canceled 361,072 options with
exercise prices ranging from $17.82 to $61.88 and granted the same number of new
options with an exercise price of $15.19 per share, the fair market value of the
stock on December 16, 1997.

     The following table summarizes the activity under Arch's stock option plans
for the periods presented:

<TABLE>
<CAPTION>
                                                                   WEIGHTED
                                                                   AVERAGE
                                                       NUMBER OF   EXERCISE
                                                        OPTIONS     PRICE
                                                       ---------   --------
<S>                                                    <C>         <C>
Options Outstanding at December 31, 1996.............    349,065    $34.11
     Granted.........................................    166,785     20.03
     Exercised.......................................         --        --
     Terminated......................................    (62,207)    31.97
                                                       ---------    ------
Options Outstanding at December 31, 1997.............    453,643     29.22
     Granted.........................................    656,096     14.27
     Exercised.......................................    (31,344)     9.38
     Terminated......................................   (429,627)    28.54
                                                       ---------    ------
Options Outstanding at December 31, 1998.............    648,768     15.51
     Granted.........................................  1,295,666      7.80
     Exercised.......................................         --        --
     Terminated......................................   (109,672)    13.89
                                                       ---------    ------
Options Outstanding at December 31, 1999.............  1,834,762     10.16
                                                       =========    ======
Options Exercisable at December 31, 1999.............    255,264    $17.00
                                                       =========    ======
</TABLE>

                                      F-16
<PAGE>   165
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The following table summarizes the options outstanding and options
exercisable by price range at December 31, 1999:

<TABLE>
<CAPTION>
                                 WEIGHTED
                                  AVERAGE     WEIGHTED                 WEIGHTED
                                 REMAINING    AVERAGE                  AVERAGE
   RANGE OF         OPTIONS     CONTRACTUAL   EXERCISE     OPTIONS     EXERCISE
EXERCISE PRICES   OUTSTANDING      LIFE        PRICE     EXERCISABLE    PRICE
---------------   -----------   -----------   --------   -----------   --------
<S>               <C>           <C>           <C>        <C>           <C>
$ 4.31 - $ 6.31       26,400       9.58        $ 5.70        7,900      $ 5.46
  7.83 -   7.83    1,263,266       9.42          7.83        2,000        7.83
 10.69 -  15.19      500,954       8.09         14.33      210,996       14.49
 18.75 -  23.63       32,974       5.99         20.76       23,516       21.03
 37.50 -  82.68       11,168       5.52         66.56       10,852       66.99
---------------    ---------       ----        ------      -------      ------
$ 4.31 - $82.68    1,834,762       8.98        $10.16      255,264      $17.00
===============    =========       ====        ======      =======      ======
</TABLE>

     Employee Stock Purchase Plans--The Company's employee stock purchase plans
allow eligible employees the right to purchase common stock, through payroll
deductions not exceeding 10% of their compensation, at the lower of 85% of the
market price at the beginning or the end of each six-month offering period.
During 1997, 1998 and 1999, 50,447, 85,996 and 34,217 shares were issued at an
average price per share of $15.87, $6.39 and $5.60, respectively. At December
31, 1999, 465,783 shares are available for future issuance.

     Accounting for Stock-Based Compensation--Arch accounts for its stock option
and stock purchase plans under APB Opinion No. 25 "Accounting for Stock Issued
to Employees." Since all options have been issued at a grant price equal to fair
market value, no compensation cost has been recognized in the statements of
operations. Had compensation cost for these plans been determined consistent
with SFAS No. 123, "Accounting for Stock-Based Compensation", Arch's net income
(loss) and income (loss) per share would have been increased to the following
pro forma amounts:

<TABLE>
<CAPTION>
                                                                 YEARS ENDED DECEMBER 31,
                                                        ------------------------------------------
                                                            1997           1998           1999
                                                        ------------   ------------   ------------
                                                         (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                      <C>                            <C>            <C>            <C>
Net income (loss):       As reported..................   $(181,874)     $(206,051)     $(285,586)
                         Pro forma....................    (183,470)      (208,065)      (288,070)
Basic net income (loss)
per common share:        As reported..................      (26.31)        (29.59)         (9.10)
                         Pro forma....................      (26.55)        (29.88)         (9.18)
</TABLE>

     Because the SFAS No. 123 method of accounting has not been applied to the
options granted prior to January 1, 1995, the resulting pro forma compensation
cost may not be representative of that to be expected in future years. The fair
value of each option grant is estimated on the date of grant using the
Black-Scholes option pricing model. In computing these pro forma amounts, Arch
has assumed risk-free interest rates of 4.5%-6%, an expected life of 5 years, an
expected dividend yield of zero and an expected volatility of 50%-87%.

     The weighted average fair values (computed consistent with SFAS No. 123) of
options granted under all plans in 1997, 1998 and 1999 were $10.11, $8.34 and
$5.56, respectively. The weighted average fair value of shares sold under the
employee stock purchase plans in 1997, 1998 and 1999 was $8.49, $5.64 and $3.13,
respectively.

     Deferred Compensation Plan for Nonemployee Directors--Under the deferred
compensation plan for nonemployee directors, outside directors may elect to
defer, for a specified period of time, receipt of some or all of the annual and
meeting fees which would otherwise be payable for service as a director. A
portion of the deferred compensation may be converted into phantom stock units,
at the election of the director.

                                      F-17
<PAGE>   166
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

The number of phantom stock units granted equals the amount of compensation to
be deferred as phantom stock divided by the fair value of Arch common stock on
the date the compensation would have otherwise been paid. At the end of the
deferral period, the phantom stock units will be converted to cash based on the
fair market value of Arch common stock on the date of distribution. Deferred
compensation is expensed when earned. Changes in the value of the phantom stock
units are recorded as income/expense based on the fair market value of Arch
common stock.

     Stockholders Rights Plan--In October 1995, Arch's board of directors
adopted a stockholders rights plan and declared a dividend of one preferred
stock purchase right for each outstanding share of common stock to stockholders
of record at the close of business on October 25, 1995. Each Right entitles the
registered holder to purchase from Arch one one-thousandth of a share of Series
B Junior Participating Preferred Stock, at a cash purchase price of $150,
subject to adjustment. Pursuant to the Plan, the Rights automatically attach to
and trade together with each share of common stock. The Rights will not be
exercisable or transferable separately from the shares of common stock to which
they are attached until the occurrence of certain events. The Rights will expire
on October 25, 2005, unless earlier redeemed or exchanged by Arch in accordance
with the Plan.

5.  INCOME TAXES

     Arch accounts for income taxes under the provisions of SFAS No. 109
"Accounting for Income Taxes." Deferred tax assets and liabilities are
determined based on the difference between the financial statement and tax bases
of assets and liabilities, given the provisions of enacted laws.

     The components of the net deferred tax asset (liability) recognized in the
accompanying consolidated balance sheets at December 31, 1998 and 1999 are as
follows (in thousands):

<TABLE>
<CAPTION>
                                                      1998        1999
                                                    ---------   ---------
<S>                                                 <C>         <C>
Deferred tax assets...............................  $ 179,484   $ 312,527
Deferred tax liabilities..........................    (67,652)    (41,617)
                                                    ---------   ---------
                                                      111,832     270,910
Valuation allowance...............................   (111,832)   (270,910)
                                                    ---------   ---------
                                                    $      --   $      --
                                                    =========   =========
</TABLE>

     The approximate effect of each type of temporary difference and
carryforward at December 31, 1998 and 1999 is summarized as follows (in
thousands):

<TABLE>
<CAPTION>
                                                          1998        1999
                                                        ---------   ---------
<S>                                                     <C>         <C>
Net operating losses..................................  $ 128,213   $ 174,588
Intangibles and other assets..........................    (62,084)     36,029
Depreciation of property and equipment................     39,941      42,703
Accruals and reserves.................................      5,762      17,590
                                                        ---------   ---------
                                                          111,832     270,910
Valuation allowance...................................   (111,832)   (270,910)
                                                        ---------   ---------
                                                        $      --   $      --
                                                        =========   =========
</TABLE>

     The effective income tax rate differs from the statutory federal tax rate
primarily due to the nondeductibility of goodwill amortization and the inability
to recognize the benefit of current net operating loss (NOL) carryforwards. The
NOL carryforwards expire at various dates through 2014. The Internal Revenue
Code contains provisions that may limit the NOL carryforwards available to be
used in any given year if certain events occur, including significant changes in
ownership, as defined.

                                      F-18
<PAGE>   167
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The Company has established a valuation reserve against its net deferred
tax asset until it becomes more likely than not that this asset will be realized
in the foreseeable future. Of the valuation allowance at December 31, 1999,
approximately $60.3 million will be recorded to goodwill when realized.

6.  COMMITMENTS AND CONTINGENCIES

     In the ordinary course of business, the Company and its subsidiaries are
defendants in a variety of judicial proceedings. In the opinion of management,
there is no proceeding pending, or to the knowledge of management threatened,
which, in the event of an adverse decision, would result in a material adverse
change in the financial condition or results of operations of the Company.

     Arch has operating leases for office and transmitting sites with lease
terms ranging from one month to approximately fifty years. In most cases, Arch
expects that, in the normal course of business, leases will be renewed or
replaced by other leases.

     Future minimum lease payments under noncancellable operating leases at
December 31, 1999 are as follows (in thousands):

<TABLE>
<CAPTION>
YEAR ENDING DECEMBER 31,
------------------------
<S>                                                           <C>
2000........................................................  $ 51,091
2001........................................................    42,611
2002........................................................    35,957
2003........................................................    29,457
2004........................................................    22,969
Thereafter..................................................   143,426
                                                              --------
          Total.............................................  $325,511
                                                              ========
</TABLE>

     Total rent expense under operating leases for the years ended December 31,
1997, 1998 and 1999 approximated $19.8 million, $19.6 million and $48.3 million,
respectively.

7.  EMPLOYEE BENEFIT PLANS

     Retirement Savings Plans--Arch has retirement savings plans, qualifying
under Section 401(k) of the Internal Revenue Code covering eligible employees,
as defined. Under the plans, a participant may elect to defer receipt of a
stated percentage of the compensation which would otherwise be payable to the
participant for any plan year (the deferred amount) provided, however, that the
deferred amount shall not exceed the maximum amount permitted under Section
401(k) of the Internal Revenue Code. The plans provide for employer matching
contributions. Matching contributions for the years ended December 31, 1997,
1998 and 1999 approximated $302,000, $278,000 and $960,000, respectively.

8.  LONG-TERM LIABILITIES

     During 1998 and 1999, Arch sold communications towers, real estate, site
management contracts and/or leasehold interests involving 133 sites in 22 states
and leased space on the towers on which it currently operates communications
equipment to service its own messaging network. Net proceeds from the sales were
approximately $33.4 million, Arch used the net proceeds to repay indebtedness
under its credit facility.

     Arch entered into options to repurchase each site and until this continuing
involvement ends the gain on the sale of the tower sites is deferred and
included in other long-term liabilities. At December 31, 1999, approximately
$24.9 million of the gain is deferred and approximately $1.9 million of this
gain has been recognized in the statement of operations and is included in
operating income for each of the years ended December 31, 1998 and 1999,
respectively.

                                      F-19
<PAGE>   168
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Also included in other long-term liabilities is an unfavorable lease
accrual related to MobileMedia's rentals on communications towers which were in
excess of market rental rates (see Note 2). At December 31, 1999, the remaining
balance of this accrual was approximately $51.5 million. This accrual is being
amortized over the term of the leases with approximately 13 3/4 years remaining
at December 31, 1999.

9.  RESTRUCTURING RESERVES

     Divisional reorganization--In June 1998, Arch's board of directors approved
a reorganization of Arch's operations. As part of the divisional reorganization,
Arch is in the process of consolidating certain regional administrative support
functions, such as customer service, collections, inventory and billing, to
reduce redundancy and take advantage of various operating efficiencies. In
connection with the divisional reorganization, Arch:

     - anticipates a net reduction of approximately 10% of its workforce;

     - is closing certain office locations and redeploying other assets; and

     - recorded a restructuring charge of $14.7 million in 1998.

     In conjunction with the completion of the MobileMedia merger in June 1999,
the timing and implementation of the divisional reorganization announced in June
1998 was reviewed by Arch management. The plan was reviewed within the context
of the combined company integration plan which was approved by the Company in
the third quarter of 1999. After this review it was determined that significant
changes needed to be made to the divisional reorganization plan. In the quarter
ended September 30, 1999, the Company identified certain of its facilities and
network leases that will not be utilized following the integration of the
Company and MobileMedia, resulting in an additional charge of $2.6 million. This
charge was offset by reductions to previously provided severance and other costs
of $4.8 million.

     The provision for lease obligations and terminations relates primarily to
future lease commitments on local, regional and divisional office facilities
that will be closed as part of this reorganization. The charge represents future
lease obligations, on such leases past the dates the offices will be closed by
the Company, or for certain leases, the cost of terminating the leases prior to
their scheduled expiration. Cash payments on the leases and lease terminations
will occur over the remaining lease terms, the majority of which expire prior to
2001.

     Through the elimination of certain local and regional administrative
operations and the consolidation of certain support functions, the Company will
eliminate approximately 280 net positions. As a result of eliminating these
positions approximately 900 employees will be effected. The majority of the
positions which have been or will be eliminated are related to customer service,
collections, inventory and billing functions in local and regional offices which
will be closed. As of December 31, 1998 and 1999, 217 employees and 414
employees, respectively, had been terminated due to the divisional
reorganization. The remaining severance and benefits costs will be paid during
2000.

     The Company's restructuring activity as of December 31, 1999 is as follows
(in thousands):

<TABLE>
<CAPTION>
                                        RESERVE
                                       INITIALLY     RESERVE     AMOUNTS   REMAINING
                                      ESTABLISHED   ADJUSTMENT    PAID      RESERVE
                                      -----------   ----------   -------   ---------
<S>                                   <C>           <C>          <C>       <C>
Severance costs.....................    $ 9,700      $(3,547)    $5,123     $1,030
Lease obligation costs..............      3,500        2,570        872      5,198
Other costs.........................      1,500       (1,223)       277         --
                                        -------      -------     ------     ------
Total...............................    $14,700      $(2,200)    $6,272     $6,228
                                        =======      =======     ======     ======
</TABLE>

                                      F-20
<PAGE>   169
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     MobileMedia Acquisition Reserve--On June 3, 1999, Arch completed its
acquisition of MobileMedia and commenced the development of plans to integrate
the operations of MobileMedia. During the third quarter of 1999, Arch's board of
directors approved plans covering the elimination of redundant headcount and
facilities in connection with the overall integration of operations. It is
expected that the integration activity relating to the MobileMedia merger, will
be completed by December 31, 2000.

     In connection with the MobileMedia acquisition, Arch anticipates a net
reduction of approximately 10% of MobileMedia's workforce and the closing of
certain facilities and tower sites. This resulted in the establishment a $14.5
million acquisition reserve which is included as part of the purchase price of
MobileMedia. The initial acquisition reserve consisted of approximately (i) $6.1
million for employee severance, (ii) $7.9 million for lease obligations and
terminations and (iii) $0.5 million of other costs.

     The provision for lease obligations and terminations relates primarily to
future lease commitments on local, regional and divisional office facilities
that will be closed as part of this reorganization. The charge represents future
lease obligations, on such leases past the dates the offices will be closed by
the Company, or for certain leases, the cost of terminating the leases prior to
their scheduled expiration. Cash payments on the leases and lease terminations
will occur over the remaining lease terms, the majority of which expire prior to
2003.

     Through the elimination of redundant management, administrative, customer
service, collections and inventory functions, the Company will eliminate
approximately 500 positions. As of December 31, 1999, 174 former MobileMedia
employees had been terminated.

     The MobileMedia acquisition reserve activity as of December 31, 1999 was as
follows (in thousands):

<TABLE>
<CAPTION>
                                                  RESERVE
                                                 INITIALLY    AMOUNTS   REMAINING
                                                ESTABLISHED    PAID      RESERVE
                                                -----------   -------   ---------
<S>                                             <C>           <C>       <C>
Severance costs...............................    $ 6,058     $3,380     $ 2,678
Lease obligation costs........................      7,950        122       7,828
Other costs...................................        500        123         377
                                                  -------     ------     -------
Total.........................................    $14,508     $3,625     $10,883
                                                  =======     ======     =======
</TABLE>

10.  SEGMENT REPORTING

     The Company operates in one industry: providing wireless messaging
services. On December 31, 1999, the Company operated approximately 375 retail
stores in the United States.

                                      F-21
<PAGE>   170
                        ARCH COMMUNICATIONS GROUP, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

11.  QUARTERLY FINANCIAL RESULTS (UNAUDITED)

     Quarterly financial information for the years ended December 31, 1998 and
1999 is summarized below (in thousands, except per share amounts):

<TABLE>
<CAPTION>
                                              FIRST      SECOND     THIRD      FOURTH
                                             QUARTER    QUARTER    QUARTER    QUARTER
                                             --------   --------   --------   --------
<S>                                          <C>        <C>        <C>        <C>
YEAR ENDED DECEMBER 31, 1998:
     Revenues..............................  $102,039   $103,546   $104,052   $103,998
     Operating income (loss)...............   (19,418)   (33,956)   (20,783)   (20,272)
     Income (loss) before extraordinary
       item................................   (45,839)   (60,877)   (47,994)   (49,621)
     Extraordinary charge..................        --     (1,720)        --         --
     Net income (loss).....................   (45,839)   (62,597)   (47,994)   (49,621)
     Basic/diluted net income (loss) per
       common share:
          Income (loss) before
            extraordinary
            item...........................     (6.59)     (8.71)     (6.91)     (7.14)
          Extraordinary charge.............        --      (0.25)        --         --
          Net income (loss)................     (6.59)     (8.96)     (6.91)     (7.14)
YEAR ENDED DECEMBER 31, 1999:
     Revenues..............................   100,888    133,493    206,189    201,254
     Operating income (loss)...............   (16,086)   (34,546)   (27,075)   (20,032)
     Income (loss) before extraordinary
       item and accounting change..........   (45,763)  (110,728)   (67,739)   (64,958)
     Extraordinary gain....................        --         --         --      6,963
     Cumulative effect of accounting
       change..............................    (3,361)        --         --         --
     Net income (loss).....................   (49,124)  (110,728)   (67,739)   (57,995)
     Basic/diluted net income (loss) per
       common share:
          Income (loss) before
            extraordinary item and
            accounting change..............     (6.54)     (5.65)     (1.42)     (1.29)
          Extraordinary gain...............        --         --         --       0.14
          Cumulative effect of accounting
            change.........................     (0.48)        --         --         --
          Net income (loss)................     (7.02)     (5.65)     (1.42)     (1.15)
</TABLE>

                                      F-22
<PAGE>   171

                        ARCH COMMUNICATIONS GROUP, INC.
                     CONSOLIDATED CONDENSED BALANCE SHEETS
                      (IN THOUSANDS, EXCEPT SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                              DECEMBER 31,     JUNE 30,
                                                                  1999           2000
                                                              ------------    -----------
                                                                              (UNAUDITED)
<S>                                                           <C>             <C>
                                         ASSETS
Current assets:
  Cash and cash equivalents.................................   $    3,161     $    3,858
  Accounts receivable, net..................................       61,167         63,368
  Inventories...............................................        9,101          7,246
  Prepaid expenses and other................................       11,874         16,306
                                                               ----------     ----------
          Total current assets..............................       85,303         90,778
                                                               ----------     ----------
Property and equipment, at cost.............................      714,644        781,021
Less accumulated depreciation and amortization..............     (314,445)      (398,783)
                                                               ----------     ----------
Property and equipment, net.................................      400,199        382,238
                                                               ----------     ----------
Intangible and other assets, net............................      867,543        778,210
                                                               ----------     ----------
                                                               $1,353,045     $1,251,226
                                                               ==========     ==========

                     LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
Current liabilities:
  Current maturities of long-term debt......................   $    8,060     $   14,310
  Accounts payable..........................................       30,016         48,122
  Accrued restructuring.....................................       17,111         12,754
  Accrued interest..........................................       30,294         30,200
  Accrued expenses and other liabilities....................       79,330         64,235
                                                               ----------     ----------
          Total current liabilities.........................      164,811        169,621
                                                               ----------     ----------
Long-term debt, less current maturities.....................    1,322,508      1,104,011
                                                               ----------     ----------
Other long-term liabilities.................................       83,285         78,772
                                                               ----------     ----------
Redeemable convertible preferred stock......................           --         43,953
                                                               ----------     ----------
Stockholders' equity (deficit):
  Preferred stock -- $.01 par value.........................            3              3
  Common stock -- $.01 par value............................          512            661
  Additional paid-in capital................................      661,413        817,116
  Accumulated deficit.......................................     (879,487)      (962,911)
                                                               ----------     ----------
          Total stockholders' equity (deficit)..............     (217,559)      (145,131)
                                                               ----------     ----------
                                                               $1,353,045     $1,251,226
                                                               ==========     ==========
</TABLE>

  The accompanying notes are an integral part of these consolidated condensed
                             financial statements.
                                      F-23
<PAGE>   172

                        ARCH COMMUNICATIONS GROUP, INC.
                CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS
        (UNAUDITED AND IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                           THREE MONTHS ENDED JUNE 30,   SIX MONTHS ENDED JUNE 30,
                                           ---------------------------   -------------------------
                                               1999           2000          1999          2000
                                           ------------   ------------   -----------   -----------
<S>                                        <C>            <C>            <C>           <C>
Service, rental, and maintenance
  revenues...............................  $   122,280    $   175,631    $   212,809   $   353,291
Product sales............................       11,213         12,221         21,572        24,556
                                           -----------    -----------    -----------   -----------
          Total revenues.................      133,493        187,852        234,381       377,847
Cost of products sold....................       (7,603)        (8,381)       (14,529)      (17,261)
                                           -----------    -----------    -----------   -----------
                                               125,890        179,471        219,852       360,586
                                           -----------    -----------    -----------   -----------
Operating expenses:
Service, rental, and maintenance.........       28,093         37,839         48,386        76,954
Selling..................................       18,033         24,333         31,044        49,378
General and administrative...............       37,395         55,362         63,021       109,296
Depreciation and amortization............       76,915         89,882        128,033       180,589
                                           -----------    -----------    -----------   -----------
          Total operating expenses.......      160,436        207,416        270,484       416,217
                                           -----------    -----------    -----------   -----------
Operating income (loss)..................      (34,546)       (27,945)       (50,632)      (55,631)
Interest expense, net....................      (33,373)       (35,399)       (59,187)      (76,699)
Other expense............................      (42,809)          (804)       (43,472)       (2,010)
Equity in loss of affiliate..............           --             --         (3,200)           --
                                           -----------    -----------    -----------   -----------
Income (loss) before extraordinary item
  and accounting change..................     (110,728)       (64,148)      (156,491)     (134,340)
Extraordinary gain from early
  extinguishment of debt.................           --         44,436             --        52,051
Cumulative effect of accounting change...           --             --         (3,361)           --
                                           -----------    -----------    -----------   -----------
Net income (loss)........................     (110,728)       (19,712)      (159,852)      (82,289)
Accretion of redeemable preferred
  stock..................................           --         (1,261)            --        (1,261)
Preferred stock dividend.................         (530)          (573)        (1,043)       (1,135)
                                           -----------    -----------    -----------   -----------
Net income (loss) to common
  stockholders...........................  $  (111,258)   $   (21,546)   $  (160,895)  $   (84,685)
                                           ===========    ===========    ===========   ===========
Basic/diluted net income (loss) per
  common share before extraordinary
  charge and accounting change...........  $     (5.65)   $     (1.01)   $    (11.75)  $     (2.26)
Extraordinary item per basic/diluted
  common share...........................           --           0.68             --          0.86
Cumulative effect of accounting change
  per basic/diluted common share.........           --             --          (0.25)           --
                                           -----------    -----------    -----------   -----------
Basic/diluted net income (loss) per
  common share...........................  $     (5.65)   $     (0.33)   $    (12.00)  $     (1.40)
                                           ===========    ===========    ===========   ===========
Basic/diluted weighted average number of
  common shares outstanding..............   19,683,837     65,794,673     13,412,689    60,555,685
                                           ===========    ===========    ===========   ===========
</TABLE>

  The accompanying notes are an integral part of these consolidated condensed
                             financial statements.
                                      F-24
<PAGE>   173

                        ARCH COMMUNICATIONS GROUP, INC.
                CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
                          (UNAUDITED AND IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                SIX MONTHS ENDED
                                                                    JUNE 30,
                                                              ---------------------
                                                                1999         2000
                                                              ---------    --------
<S>                                                           <C>          <C>
Net cash provided by operating activities...................  $  36,378    $ 53,006
Cash flows from investing activities:
  Additions to property and equipment, net..................    (38,685)    (74,061)
  Additions to intangible and other assets..................    (18,679)     (3,602)
  Net proceeds from sale of tower site assets...............      3,041          --
  Acquisition of company, net of cash acquired..............   (519,105)         --
                                                              ---------    --------
Net cash used for investing activities......................   (573,428)    (77,663)
                                                              ---------    --------
Cash flows from financing activities:
  Issuance of long-term debt................................    466,058      58,000
  Repayment of long-term debt...............................   (125,999)    (33,000)
  Net proceeds from sale of common stock....................    217,243         354
                                                              ---------    --------
Net cash provided by financing activities...................    557,302      25,354
                                                              ---------    --------
Net increase in cash and cash equivalents...................     20,252         697
Cash and cash equivalents, beginning of period..............      1,633       3,161
                                                              ---------    --------
Cash and cash equivalents, end of period....................  $  21,885    $  3,858
Supplemental disclosure:
  Interest paid.............................................  $  35,809    $ 60,461
                                                              =========    ========
  Accretion of discount on senior notes.....................  $  20,316    $ 14,696
  Issuance of common stock in exchange for debt.............  $      --    $155,624
  Issuance of preferred stock in exchange for debt..........  $      --    $ 42,692
  Accretion of redeemable preferred stock...................  $      --    $  1,261
  Issuance of common stock in acquisition of company........  $  20,083    $     --
  Liabilities assumed in acquisition of company.............  $ 122,543    $     --
</TABLE>

  The accompanying notes are an integral part of these consolidated condensed
                             financial statements.
                                      F-25
<PAGE>   174

                        ARCH COMMUNICATIONS GROUP, INC.

              NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS
                                  (UNAUDITED)

     (a) Preparation of Interim Financial Statements -- The consolidated
condensed financial statements of Arch Communications Group, Inc. have been
prepared in accordance with the rules and regulations of the Securities and
Exchange Commission. The financial information included herein, other than the
consolidated condensed balance sheet as of December 31, 1999, has been prepared
by management without audit by independent accountants who do not express an
opinion thereon. The consolidated condensed balance sheet at December 31, 1999
has been derived from, but does not include all the disclosures contained in,
the audited consolidated financial statements for the year ended December 31,
1999. In the opinion of management, all of these unaudited statements include
all adjustments and accruals consisting only of normal recurring accrual
adjustments which are necessary for a fair presentation of the results of all
interim periods reported herein. These consolidated condensed financial
statements should be read in conjunction with the consolidated financial
statements and accompanying notes included in Arch's Annual Report on Form 10-K
for the year ended December 31, 1999. The results of operations for the periods
presented are not necessarily indicative of the results that may be expected for
a full year.

     (b) Intangible and Other Assets -- Intangible and other assets, net of
accumulated amortization, are comprised of the following (in thousands):

<TABLE>
<CAPTION>
                                                         JUNE 30,      DECEMBER 31,
                                                           2000            1999
                                                        -----------    ------------
                                                        (UNAUDITED)
<S>                                                     <C>            <C>
Goodwill..............................................   $227,760        $249,010
  Purchased FCC licenses..............................    328,663         354,246
  Purchased subscriber lists..........................    201,749         239,114
  Deferred financing costs............................     15,391          19,915
  Other...............................................      4,647           5,258
                                                         --------        --------
                                                         $778,210        $867,543
                                                         ========        ========
</TABLE>

     (c) Divisional Reorganization - As of June 30, 2000, 428 employees had been
terminated due to the divisional reorganization and restructuring. The Company's
restructuring activity as of June 30, 2000 is as follows (in thousands):

<TABLE>
<CAPTION>
                                          RESERVE BALANCE AT   UTILIZATION OF
                                             DECEMBER 31,        RESERVE IN     REMAINING
                                                 1999               2000         RESERVE
                                          ------------------   --------------   ---------
<S>                                       <C>                  <C>              <C>
  Severance costs.......................        $1,030             $  265        $  765
  Lease obligation costs................         5,198              1,148         4,050
                                                ------             ------        ------
          Total.........................        $6,228             $1,413        $4,815
                                                ======             ======        ======
</TABLE>

     (d) MobileMedia Acquisition Reserve - As of June 30, 2000, 261 former
MobileMedia employees had been terminated. The Company's restructuring activity
as of June 30, 2000 is as follows (in thousands):

<TABLE>
<CAPTION>
                                          RESERVE BALANCE AT   UTILIZATION OF
                                             DECEMBER 31,        RESERVE IN     REMAINING
                                                 1999               2000         RESERVE
                                          ------------------   --------------   ---------
<S>                                       <C>                  <C>              <C>
  Severance costs.......................       $ 2,678             $1,882        $  796
  Lease obligation costs................         7,828              1,023         6,805
  Other costs...........................           377                 39           338
                                               -------             ------        ------
          Total.........................       $10,883             $2,944        $7,939
                                               =======             ======        ======
</TABLE>

     (e) Debt Exchanged for Equity - In February and March 2000, Arch completed
transactions in which Arch issued an aggregate of 11,926,036 shares of Arch
common stock in exchange for approximately $160.9 million accreted value of debt
securities. Under one of the exchange agreements,

                                      F-26
<PAGE>   175
                        ARCH COMMUNICATIONS GROUP, INC.

      NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)

Arch issued 285,715 shares of common stock in exchange for $3.5 million
principal amount of Arch convertible debentures. Arch recorded $2.4 million of
non-cash interest expense in conjunction with this transaction. Under the other
exchange agreements, Arch issued 11,640,321 shares of common stock in exchange
for $157.4 million accreted value ($176.0 million maturity value) of its senior
discount notes. Arch recorded an extraordinary gain of $7.6 million on the early
extinguishment of debt as a result of these transactions.

     (f) Subsequent Event - On May 10, 2000, Arch announced it had completed its
agreement with Resurgence Asset Management L.L.C. for the exchange of $91.1
million accreted value ($100.0 million maturity value) of senior discount notes
held by various Resurgence entities for 1,000,000 shares of a new class of
Arch's preferred stock to be called Series D preferred stock. The Series D
preferred stock will:

     - be convertible at the holder's option, at any time, into an aggregate of
       6,613,180 shares of common stock;

     - be subject to mandatory conversion into an aggregate of 6,613,180 shares
       of common stock upon completion of Arch's pending merger with PageNet;

     - if not earlier converted, commencing March 15, 2001, bear semi-annual
       dividends at the rate of 10 7/8% per annum, payable at Arch's option in
       cash or through the issuance of a new class of Arch's preferred stock to
       be called Series E preferred stock;

     - be subject to mandatory redemption on March 15, 2008 if redemption is
       then permitted by applicable law;

     - vote with the common stock on an as converted basis; and

     - rank upon liquidation senior to the common stock and on a parity with
       Arch's existing Series C preferred stock.

     If Arch issues Series E preferred stock as a dividend on the Series D
preferred stock, the Series E preferred stock will be identical to the Series D
preferred stock except that it will not (1) be subject to conversion into common
stock, (2) have any voting rights as required by law or (3) bear dividends.

     Arch recorded an extraordinary gain of $44.4 million on the early
extinguishment of debt as a result of this transaction based on the difference
between the carrying value of the exchanged debt and the fair value of the
preferred stock issued. As of June 30, 2000, the Series D preferred stock is
stated at its accreted redemption value after recording $1.3 million of
accretion in the quarter ended June 30, 2000.

                                      F-27
<PAGE>   176

                         REPORT OF INDEPENDENT AUDITORS

The Board of Directors and Shareowners
Paging Network, Inc.

     We have audited the accompanying consolidated balance sheets of Paging
Network, Inc. (the Company) as of December 31, 1998 and 1999, and the related
consolidated statements of operations, cash flows and shareowners' deficit for
each of the three years in the period ended December 31, 1999. These financial
statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.

     We conducted our audits in accordance with auditing standards generally
accepted in the United States. Those standards require that we plan and perform
the audit to obtain reasonable assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. An
audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

     In our opinion, the financial statements referred to above present fairly,
in all material respects, the consolidated financial position of Paging Network,
Inc. at December 31, 1998 and 1999, and the consolidated results of its
operations and its cash flows for each of the three years in the period ended
December 31, 1999, in conformity with accounting principles generally accepted
in the United States.

     The accompanying financial statements have been prepared assuming the
Company will continue as a going concern. As more fully described in Note 2, on
July 24, 2000, the Company and all of its wholly-owned domestic subsidiaries
except for Vast Solutions, Inc. commenced a proceeding under Chapter 11 of the
United States Bankruptcy Code in the United States Bankruptcy Court for the
District of Delaware. This event, and circumstances relating to the
non-compliance with certain covenants of loan agreements with banks and note
indentures and recurring losses from operations, raise substantial doubt about
the Company's ability to continue as a going concern. Management's plans with
regard to these matters are also described in Note 2. The accompanying financial
statements do not include any adjustments to reflect the possible future effects
on the recoverability and classification of assets or amounts and classification
of liabilities that may result from the outcome of these uncertainties.

                                            /S/ ERNST & YOUNG LLP

Dallas, Texas
May 3, 2000, except for Notes 1 and 2,
  as to which the date is August 1, 2000

                                      F-28
<PAGE>   177

                              PAGING NETWORK, INC.

                          CONSOLIDATED BALANCE SHEETS
                    (IN THOUSANDS, EXCEPT SHARE INFORMATION)

<TABLE>
<CAPTION>
                                                                   DECEMBER 31,
                                                              -----------------------
                                                                 1998         1999
                                                              ----------   ----------
<S>                                                           <C>          <C>
ASSETS
Current assets:
     Cash and cash equivalents..............................  $    3,077   $   32,144
     Accounts receivable (less allowance for doubtful
      accounts of $11,119 and $17,399 in 1998 and 1999,
      respectively).........................................      84,440       84,476
     Inventories............................................       6,379        8,687
     Prepaid expenses and other assets......................      15,065        5,623
                                                              ----------   ----------
          Total current assets..............................     108,961      130,930
Property, equipment, and leasehold improvements, at cost....   1,452,870    1,451,761
     Less accumulated depreciation..........................    (547,599)    (684,648)
                                                              ----------   ----------
          Net property, equipment, and leasehold
            improvements....................................     905,271      767,113
Other non-current assets, at cost...........................     629,372      609,014
     Less accumulated amortization..........................     (62,360)     (84,497)
                                                              ----------   ----------
          Net other non-current assets......................     567,012      524,517
                                                              ----------   ----------
                                                              $1,581,244   $1,422,560
                                                              ==========   ==========
LIABILITIES AND SHAREOWNERS' DEFICIT
Current liabilities:
     Long-term debt in default..............................  $       --   $1,945,000
     Accounts payable.......................................      96,478       80,889
     Accrued expenses.......................................      49,692       50,146
     Accrued interest.......................................      43,209       42,532
     Accrued restructuring costs, current portion...........       8,256           --
     Customer deposits......................................      22,735       15,927
     Deferred revenue.......................................      15,874       19,778
                                                              ----------   ----------
          Total current liabilities.........................     236,244    2,154,272
                                                              ----------   ----------
Long-term obligations, non-current portion..................   1,815,137       58,127
Accrued restructuring costs, non-current portion............      18,765           --
Minority interest...........................................       1,517           --
Commitments and contingencies
Shareowners' deficit:
     Common Stock -- $.01 par, authorized 250,000,000
      shares; issued and outstanding 103,640,554 shares at
      December 31, 1998 and 103,960,240 shares at December
      31, 1999..............................................       1,036        1,040
     Paid-in capital........................................     132,950      134,161
     Accumulated other comprehensive income.................       2,378          745
     Accumulated deficit....................................    (626,783)    (925,785)
                                                              ----------   ----------
          Total shareowners' deficit........................    (490,419)    (789,839)
                                                              ----------   ----------
                                                              $1,581,244   $1,422,560
                                                              ==========   ==========
</TABLE>

                             See accompanying notes

                                      F-29
<PAGE>   178

                              PAGING NETWORK, INC.

                     CONSOLIDATED STATEMENTS OF OPERATIONS
                    (IN THOUSANDS, EXCEPT SHARE INFORMATION)

<TABLE>
<CAPTION>
                                                                   YEAR ENDED DECEMBER 31,
                                                             -----------------------------------
                                                               1997         1998         1999
                                                             ---------   ----------   ----------
<S>                                                          <C>         <C>          <C>
Services, rent and maintenance revenues....................  $ 818,461   $  945,524   $  897,348
Product sales..............................................    142,515      100,503       92,375
                                                             ---------   ----------   ----------
          Total revenues...................................    960,976    1,046,027      989,723
Cost of products sold......................................   (121,487)     (77,672)     (57,901)
                                                             ---------   ----------   ----------
                                                               839,489      968,355      931,822
Operating expenses:
     Services, rent and maintenance........................    173,058      210,480      267,043
     Selling...............................................    102,995      104,350       97,413
     General and administrative............................    253,886      320,586      361,386
     Depreciation and amortization.........................    289,442      281,259      327,101
     Provision for asset impairment........................     12,600           --       17,798
     Restructuring charge..................................         --       74,000      (23,531)
                                                             ---------   ----------   ----------
          Total operating expenses.........................    831,981      990,675    1,047,210
                                                             ---------   ----------   ----------
Operating income (loss)....................................      7,508      (22,320)    (115,388)
Other income (expense):
     Interest expense......................................   (151,380)    (143,762)    (150,921)
     Interest income.......................................      3,689        2,070        3,902
     Other non-operating income (expense)..................     (1,220)       2,003          851
                                                             ---------   ----------   ----------
          Total other expense..............................   (148,911)    (139,689)    (146,168)
                                                             ---------   ----------   ----------
Loss before extraordinary item and cumulative effect of a
  change in accounting principle...........................   (141,403)    (162,009)    (261,556)
Extraordinary loss.........................................    (15,544)          --           --
Cumulative effect of a change in accounting principle......         --           --      (37,446)
                                                             ---------   ----------   ----------
Net loss...................................................  $(156,947)  $ (162,009)  $ (299,002)
                                                             =========   ==========   ==========
Net loss per share (basic and diluted):
Loss before extraordinary item and cumulative effect of a
  change in accounting principle...........................  $   (1.38)  $    (1.57)  $    (2.52)
Extraordinary loss.........................................      (0.15)          --           --
Cumulative effect of a change in accounting principle......         --           --        (0.36)
                                                             ---------   ----------   ----------
Net loss per share.........................................  $   (1.53)  $    (1.57)  $    (2.88)
                                                             =========   ==========   ==========
</TABLE>

                             See accompanying notes

                                      F-30
<PAGE>   179

                              PAGING NETWORK, INC.

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                    (IN THOUSANDS, EXCEPT SHARE INFORMATION)

<TABLE>
<CAPTION>
                                                                   YEAR ENDED DECEMBER 31,
                                                              ---------------------------------
                                                                1997        1998        1999
                                                              ---------   ---------   ---------
<S>                                                           <C>         <C>         <C>
Operating activities:
  Net loss..................................................  $(156,947)  $(162,009)  $(299,002)
  Adjustments to reconcile net loss to cash provided by
     operating activities:
       Provision for asset impairment.......................     12,600          --      17,798
       Cumulative effect of a change in accounting
          principle.........................................         --          --      37,446
       Restructuring charge.................................         --      74,000     (23,531)
       Extraordinary loss...................................     15,544          --          --
       Depreciation.........................................    258,798     252,234     307,536
       Amortization.........................................     30,644      29,025      19,565
       Provision for doubtful accounts......................     18,343      20,516      28,189
       Amortization of debt issuance costs..................      8,418       4,430       4,574
       Other non-operating (income) expense.................      1,220      (2,003)       (851)
  Changes in operating assets and liabilities:
       Accounts receivable..................................    (21,542)    (35,081)    (29,438)
       Inventories..........................................     (1,302)     18,349      (2,506)
       Prepaid expenses and other assets....................     (6,016)      9,133       9,270
       Accounts payable.....................................    (18,397)     22,768      14,963
       Accrued expenses and accrued interest................      4,286      16,203         247
       Accrued restructuring costs..........................         --      (1,979)     (3,490)
       Customer deposits and deferred revenue...............      4,854       2,515      (2,904)
                                                              ---------   ---------   ---------
Net cash provided by operating activities...................    150,503     248,101      77,866
                                                              ---------   ---------   ---------
Investing activities:
     Capital expenditures...................................   (328,365)   (268,183)   (234,926)
     Payments for spectrum licenses.........................    (92,856)    (13,065)     (3,768)
     Restricted cash invested in money market instruments...     (6,422)         --      (1,024)
     Business acquisitions and joint venture investments....     (7,253)     (7,322)         --
     Deposits for purchase of subscriber devices............    (13,493)         --          --
     Other, net.............................................    (11,540)      2,984       2,399
                                                              ---------   ---------   ---------
Net cash used in investing activities.......................   (459,929)   (285,586)   (237,319)
                                                              ---------   ---------   ---------
Financing activities:
     Borrowings of long-term obligations....................    558,317     305,587     325,280
     Repayments of long-term obligations....................    (39,000)   (275,555)   (137,966)
     Proceeds from exercise of stock options................         87       7,606       1,206
     Redemption of $200 million senior subordinated notes...   (211,750)         --          --
     Other, net.............................................        919          --          --
                                                              ---------   ---------   ---------
Net cash provided by financing activities...................    308,573      37,638     188,520
                                                              ---------   ---------   ---------
Net increase (decrease) in cash and cash equivalents........       (853)        153      29,067
Cash and cash equivalents at beginning of year..............      3,777       2,924       3,077
                                                              ---------   ---------   ---------
Cash and cash equivalents at end of year....................  $   2,924   $   3,077   $  32,144
                                                              =========   =========   =========
</TABLE>

                             See accompanying notes

                                      F-31
<PAGE>   180

                              PAGING NETWORK, INC.

                CONSOLIDATED STATEMENTS OF SHAREOWNERS' DEFICIT

                  YEAR ENDED DECEMBER 31, 1997, 1998 AND 1999
                    (IN THOUSANDS, EXCEPT SHARE INFORMATION)

<TABLE>
<CAPTION>
                                                                ACCUMULATED
                                                                   OTHER
                                           COMMON   PAID-IN    COMPREHENSIVE   ACCUMULATED   SHAREOWNERS'
                                           STOCK    CAPITAL       INCOME         DEFICIT       DEFICIT
                                           ------   --------   -------------   -----------   ------------
<S>                                        <C>      <C>        <C>             <C>           <C>
Balance, December 31, 1996...............  $1,026   $124,522      $   104       $(307,827)    $(182,175)
     Net loss............................     --          --           --        (156,947)     (156,947)
     Foreign currency translation
       adjustments.......................     --          --          804              --           804
                                                                                              ---------
          Total comprehensive loss.......                                                      (156,143)
     Issuance of 38,838 shares of
          Common stock pursuant to stock
          option and compensation
          plans..........................      1         386           --              --           387
                                           ------   --------      -------       ---------     ---------
Balance, December 31, 1997...............  1,027     124,908          908        (464,774)     (337,931)
     Net loss............................     --          --           --        (162,009)     (162,009)
     Foreign currency translation
       adjustments.......................     --          --        1,470              --         1,470
                                                                                              ---------
          Total comprehensive loss.......                                                      (160,539)
     Issuance of 980,639 shares of
          Common stock pursuant to stock
          option and compensation
          plans..........................      9       8,042           --              --         8,051
                                           ------   --------      -------       ---------     ---------
Balance, December 31, 1998...............  1,036     132,950        2,378        (626,783)     (490,419)
     Net loss............................     --          --           --        (299,002)     (299,002)
     Foreign currency translation
       adjustments.......................     --          --       (1,633)             --        (1,633)
                                                                                              ---------
          Total comprehensive loss.......                                                      (300,635)
     Issuance of 319,686 shares of
          Common stock pursuant to stock
          option and compensation
          plans..........................      4       1,211           --              --         1,215
                                           ------   --------      -------       ---------     ---------
Balance, December 31, 1999...............  $1,040   $134,161      $   745       $(925,785)    $(789,839)
                                           ======   ========      =======       =========     =========
</TABLE>

                             See accompanying notes

                                      F-32
<PAGE>   181

                              PAGING NETWORK, INC.
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.  THE COMPANY AND MERGER AGREEMENT

     PagingNetwork, Inc. (the "Company") is a provider of wireless
communications services throughout the United States and the U.S. Virgin
Islands, Puerto Rico, and Canada. The Company provides service in all 50 states
and the District of Columbia, including service in the 100 most populated
markets in the United States. The Company also owns a minority interest in a
wireless communications company in Brazil.

     On November 7, 1999, the Company signed a definitive agreement (the "Merger
Agreement") to merge (the "Merger") with Arch Communications group, Inc.
("Arch"). The Merger Agreement was subsequently amended on January 7, 2000, May
10, 2000, and July 23, 2000. Under the Merger Agreement, as amended, the
Company's senior subordinated notes, along with all accrued interest thereon,
will be exchanged for common stock of Arch representing 46.1% of the common
stock of the combined company and the Company's common stock will be converted
into common stock representing 5.0% of the common stock of the combined company.
The Merger Agreement also provides for the Company to distribute 80.5% of its
interest in Vast Solutions, Inc. ("Vast"), a wholly-owned subsidiary of the
Company, to holders of the Company's senior subordinated notes and common stock.
Holders of the senior subordinated notes will receive common stock of Vast
representing 60.5% of the equity of Vast, while holders of the Company's common
stock will receive common stock of Vast representing 20% of the equity of Vast.
The remaining interest in Vast will be held by the combined company following
the Merger.

     As more fully discussed in Note 2, the Company will seek to complete the
Merger through the Company's plan of reorganization resulting from the Company's
bankruptcy filing in July 2000. Consummation of the Merger is also subject to
customary regulatory review. The Company has received approval from the
Department of Justice and the Federal Communications Commission to proceed with
the Merger. If the Merger Agreement is terminated after one party pursues an
alternative offer, a plan of reorganization of the Company other than the one
contemplated in the Merger Agreement is filed by the Company and/or confirmed by
a bankruptcy court, or under other specified circumstances, either the Company
or Arch may be required to pay a termination fee of $40 million.

2.  CHAPTER 11 REORGANIZATION AND BASIS OF PRESENTATION

     The accompanying financial statements have been prepared on a going concern
basis, which contemplates the realization of assets and the satisfaction of
liabilities in the normal course of business. As shown in the accompanying
financial statements, the Company incurred losses of $157 million, $162 million,
and $299 million during the years ended December 31, 1997, 1998, and 1999,
respectively. The Company's deteriorating financial results and liquidity caused
it to be in default of the covenants of all of its domestic debt agreements. On
February 2, 2000 and August 1, 2000, the Company failed to make the semi-annual
interest payments on its 8.875% Senior Subordinated notes due 2008 (the "8.875%
Notes") and its 10.125% senior subordinated notes due 2007 (the "10.125%
Notes"), and on April 17, 2000, the Company failed to make the semi-annual
interest payment on its 10% senior subordinated notes due 2008 (the "10%
Notes"). The Company also violated several of the financial and other covenants
of the Credit Agreement. As a result, on July 14, 2000, three senior
subordinated noteholders commenced an involuntary proceeding against the Company
under Chapter 11 of the United States Bankruptcy Code (the "Bankruptcy Code").

     On July 24, 2000 (the "Petition Date"), the Company consented to an order
for relief which, in effect, converted the bankruptcy case filed on July 14 to a
voluntary Chapter 11 case. Also on the Petition Date, the Company's domestic
subsidiaries except for Vast filed voluntary petitions for relief under the
Bankruptcy Code (such subsidiaries and the Company are hereafter referred to
collectively as the "Debtors"). Subsequent to the Petition Date, the Debtors are
operating as debtors-in-possession and are subject to the jurisdiction of the
United States Bankruptcy Court for the district of Delaware (the "Bankruptcy
Court"). Chapter 11 is the principal business reorganization chapter of the
Bankruptcy Code.

                                      F-33
<PAGE>   182
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

Under Chapter 11 of the Bankruptcy Code, a debtor is authorized to reorganize
its business for the benefit of its creditors and stockholders. In addition to
permitting rehabilitation of the debtor, another goal of Chapter 11 is to
promote equality of treatment of creditors and equity security holders of equal
rank with respect to the restructuring of debt. In furtherance of these two
goals, upon the filing of a petition for reorganization under Chapter 11,
section 362(a) of the Bankruptcy Code generally provides for an automatic stay
of substantially all acts and proceedings against the debtor and its property,
including all attempts to collect claims or enforce liens that arose prior to
the commencement of the debtor's case under Chapter 11.

     The Bankruptcy Court has exercised supervisory powers over the operations
of the Debtors with respect to the employment of attorneys, investment bankers
and other professionals, and transactions out of the Debtors' ordinary course of
business or otherwise requiring bankruptcy court approval under the Bankruptcy
Code. The Debtors have been paying undisputed obligations that have arisen
subsequent to the Petition Date on a timely basis. Since the Petition Date, the
Bankruptcy Court has entered orders, among other things, allowing the Debtors
(i) to pay certain customer refunds and deposits in the ordinary course of
business, (ii) to pay wages, salaries and benefits owing to employees, and (iii)
to pay pre-petition obligations owed to continuing vendors as such obligations
come due.

     On July 25, 2000, the Debtors filed a Joint Plan of Reorganization and
disclosure statement which provide for the implementation of the Merger as the
Debtors' plan of reorganization. A hearing with respect to the Bankruptcy
Court's approval of the Debtors' disclosure statement is scheduled for September
7, 2000, at which time the Bankruptcy Court will determine if the Debtors' Joint
Plan of Reorganization providing for the implementation of the Merger will be
submitted to the creditors and shareholders of the Debtors for approval.

     As of July 31, 2000, the Company has approximately $66.0 million in cash.
Upon commencement of the Chapter 11 case, the Company obtained
debtor-in-possession loan facility (the "DIP Facility") from the current lenders
under the Credit Agreement which provided for additional secured borrowings by
both PageNet and Vast not to exceed $50 million in the aggregate, subject to
certain limitations as set forth in the loan agreement. Borrowings under the DIP
Facility bear interest at prime plus 2.5% for outstanding borrowings up to $15
million, and at prime plus 3.0% for outstanding borrowings in excess of $15
million, due monthly. All amounts outstanding under the DIP Facility are due the
earlier of (i) the confirmation of the Debtors' Joint Plan of Reorganization, or
(ii) November 30, 2000. The Company believes that its existing cash, the cash
expected to be generated from operations, and the cash available under the DIP
Facility is sufficient to meet its obligations, except for the cash interest
payments due under the Notes, through the completion of the Merger. However, if
the Company's financial results continue to deteriorate, the Merger is delayed,
or other unforeseen events occur, the Company may not have sufficient liquidity
to meet its obligations through the completion of the Merger. If the Merger is
not completed, the Company would likely be required to consider a stand-alone
restructuring, asset sales, transactions with other potential merger parties or
acquirors, or liquidation. In addition, if the Merger is not completed, the
Company would likely incur significant charges for asset impairments and
restructuring its obligations. The accompanying financial statements do not
include any adjustments relating to the possible future effects on the
recoverability and classification of assets or the amounts and classification of
liabilities that might be necessary should the Merger not be completed.

3.  SIGNIFICANT ACCOUNTING POLICIES

     Consolidation -- The consolidated financial statements include the accounts
of all of its wholly and majority-owned subsidiaries. All intercompany
transactions have been eliminated. Certain amounts from prior years have been
reclassified to conform with the current year presentation.

                                      F-34
<PAGE>   183
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Use of estimates -- The preparation of financial statements in conformity
with generally accepted accounting principles requires management to make
estimates and assumptions that affect the amounts reported in the financial
statements and accompanying notes. Actual results could differ from those
estimates.

     Inventories -- Inventories consist of subscriber devices which are held
specifically for resale. Inventories are stated at the lower of cost or market,
with cost determined on a first-in, first-out basis.

     Property, equipment, and leasehold improvements -- Property, equipment, and
leasehold improvements are stated at cost, less accumulated depreciation.
Expenditures for maintenance are charged to expense as incurred. Upon retirement
of units of equipment, the costs of units retired and the related accumulated
depreciation amounts are removed from the accounts. Depreciation is computed
using the straight-line method based on the following estimated useful lives:

<TABLE>
<S>                                                             <C>
Machinery and equipment.....................................    3 to 10 years(1)
Subscriber devices..........................................          2 years(1)(2)
Furniture and fixtures......................................          7 years
Leasehold improvements......................................          5 years(3)
Building and building improvements..........................         20 years
</TABLE>

---------------
(1) Effective April 1, 1999, the Company changed the depreciable lives of its
    subscriber devices from 3 years to 2 years and the depreciable life of
    certain of its network equipment from 7 years to 10 years (see Note 5).

(2) Effective January 1, 1997, the Company changed the depreciable life of its
    subscriber devices from 4 years to 3 years, with estimated residual value
    ranging up to $20 (see Note 5).

(3) Or term of lease if shorter.

     The Company reserves for subscriber devices, which it estimates to be
non-recoverable.

     Other non-current assets -- Other non-current assets are stated at cost,
less accumulated amortization. Amortization is computed using the straight-line
method based upon the following estimated useful lives:

<TABLE>
<S>                                                        <C>
Licenses and frequencies...............................                  40 years
Goodwill...............................................                  20 years
Other intangible assets................................      18 months to 3 years
Other non-current assets...............................      10 years to 12 years
</TABLE>

     Deferred revenues and customer deposits -- Deferred revenues represent
billing to customers in advance for services not yet performed and are
recognized as revenue in the month the service is provided. Deposits are
received from some customers at the time a service agreement is signed and are
recognized as a liability of the Company until such time as the deposits are
applied, generally against the customer's final bill.

     Revenue recognition -- Services, rent and maintenance revenues are
recognized in the month the related services are performed. Product sales are
recognized upon delivery of product to the customer.

     Employee stock options -- The Company has elected to follow Accounting
Principles Board Opinion No. 25, "Accounting for Stock Issued to Employees" (APB
25) and related interpretations in accounting for its employee stock option
plans. Under APB 25, because the exercise price of the Company's employee stock
options has historically equaled the market price of the underlying stock on the
date of grant, no compensation expense has been recognized.

                                      F-35
<PAGE>   184
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Advertising costs -- The Company expenses the costs of advertising as
incurred. Advertising expense for the years ended December 31, 1997, 1998, and
1999, was $22 million, $19 million, and $17 million, respectively.

     Comprehensive income (loss) -- Other comprehensive income as of December
31, 1997, 1998, and 1999, consists solely of foreign currency translation
adjustments.

     Capitalization of internally developed software -- The Company adopted the
provisions of Statement of Position 98-1, "Accounting for the Costs of Computer
Software Developed For or Obtained for Internal Use" (SOP 98-1), effective
January 1, 1999. SOP 98-1 requires the capitalization of certain costs of
developing or acquiring computer software for internal use. The adoption of SOP
98-1 did not have a material impact on the Company's results of operations or
financial position as the Company's previous policy for accounting for the costs
of developing or acquiring computer software for internal use was generally
consistent with the provisions of SOP 98-1.

4.  RESTRUCTURING CHARGE

     In February 1998, the Company's Board of Directors approved the
restructuring of the Company's domestic operations (the Restructuring). The
Company's Restructuring plan called for the elimination of redundant
administrative operations through the consolidation of key support functions
located in local and regional offices throughout the country into central
processing facilities. The Restructuring plan specified local and regional
office closures, the disposition of certain furniture, fixtures and equipment
and the termination of approximately 1,950 employees by job function and
location. Having adopted a formal plan of restructuring, the Company recorded a
$74 million charge, or $0.72 per share (basic and diluted), during the quarter
ended March 31, 1998. The components of the charge included (in thousands):

<TABLE>
<S>                                                           <C>
Write-down of property and equipment........................  $38,900
Lease obligations and terminations..........................   18,900
Severance and related benefits..............................   12,700
Other.......................................................    3,500
                                                              -------
          Total restructuring charge........................  $74,000
                                                              =======
</TABLE>

     The writedown of property and equipment related to a non-cash charge to
reduce the carrying amount of certain machinery and equipment, furniture and
fixtures, and leasehold improvements that the Company would not continue to
utilize following the Restructuring to their estimated net realizable value as
of the date such assets were projected to be disposed of or abandoned, allowing
for the recognition of normal depreciation expense on such assets through their
projected disposal date. The net realizable value of these assets was determined
based on management estimates, which considered such factors as the nature and
age of the assets to be disposed of, the timing of the assets' disposal, and the
method and potential costs of the disposal.

     The provision for lease obligations and terminations related primarily to
future lease commitments on local and regional office facilities that would be
closed as part of the Restructuring. The charge represented future lease
obligations, net of projected sublease income, on such leases past the dates the
offices would be closed by the Company, or, for certain leases, the cost of
terminating the leases prior to their scheduled expiration. Projected sublease
income was based on management estimates, which are subject to change. Cash
payments on the leases and lease terminations were expected to occur over the
remaining lease terms, the majority of which were to expire prior to 2003.

     During the fourth quarter of 1998, the Company identified additional
furniture, fixtures, and equipment that would not be utilized following the
Restructuring, resulting in an additional non-cash charge of $3 million. This
charge was offset by reductions in the provisions for lease obligations and

                                      F-36
<PAGE>   185
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

terminations and severance costs as a result of refinements to the Company's
schedule for local and regional office closures. Also as a result of the
refinements to the office closing schedule, the Company adjusted, effective
October 1, 1998, the depreciable lives of certain of the assets written down in
the first quarter of 1998, resulting in a decrease in depreciation expense of
approximately $3 million for the year ended December 31, 1998.

     The Company's restructuring activity from initial charge through December
31, 1998, was as follows (in thousands):

<TABLE>
<CAPTION>
                                                                   UTILIZATION OF RESERVE
                                         INITIAL    ADJUSTMENTS    ----------------------    REMAINING
                                         CHARGE      TO CHARGE       CASH       NON-CASH      RESERVE
                                         -------    -----------    --------    ----------    ---------
<S>                                      <C>        <C>            <C>         <C>           <C>
Fixed assets impairments...............  $38,900      $ 2,600       $   --       $41,500      $    --
Lease obligation costs.................   18,900       (1,300)         683            --       16,917
Severance costs........................   12,700       (1,300)       1,296            --       10,104
Other..................................    3,500           --           --         3,500           --
                                         -------      -------       ------       -------      -------
          Total........................  $74,000      $    --       $1,979       $45,000      $27,021
                                         =======      =======       ======       =======      =======
</TABLE>

     While progress in establishing the centralized processing facilities was
made during 1998 and early 1999, the Company's efforts to convert its offices to
its new billing and customer service software platforms fell behind the
Company's original schedule of being completed during the second quarter of
1999. Billing software and system implementation problems surfaced during the
first office conversions, and as a result, the Company had to postpone the
conversion of many of its other offices. These postponements resulted in delays
in office closures which deferred the payments of amounts accrued for lease
obligations and terminations and severance and related benefits. Additional
implementation problems surfaced during 1999 and caused further delays.

     In November 1999 and in conjunction with the announcement of the Merger, as
discussed in Note 1, the Company decided to suspend further conversions after
January 2000 pending the decisions as to which operating platforms will be used
by the combined company. As a result of the decision to suspend the
Restructuring indefinitely, the Company recorded a reversal of the unused
portion of the original restructuring charge of $24 million, or $0.23 per share
(basic and diluted), during the quarter ended December 31, 1999.

     The Company's restructuring activity from January 1, 1999 through December
31, 1999 is as follows (in thousands):

<TABLE>
<CAPTION>
                                                       UTILIZATION OF RESERVE
                                          BEGINNING    ----------------------    REVERSAL     REMAINING
                                           RESERVE       CASH       NON-CASH     OF CHARGE     RESERVE
                                          ---------    --------    ----------    ---------    ---------
<S>                                       <C>          <C>         <C>           <C>          <C>
Lease obligation costs................     $16,917      $  755        $ --       $(16,162)      $ --
Severance costs.......................      10,104       2,735          --         (7,369)        --
                                           -------      ------        ----       --------       ----
          Total.......................     $27,021      $3,490        $ --       $(23,531)      $ --
                                           =======      ======        ====       ========       ====
</TABLE>

     As a result of the Restructuring, the Company eliminated approximately 325
positions and involuntarily terminated approximately 1,150 employees during 1998
and 1999.

                                      F-37
<PAGE>   186
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

5.  PROPERTY, EQUIPMENT, AND LEASEHOLD IMPROVEMENTS

     The cost of property, equipment, and leasehold improvements consisted of
the following:

<TABLE>
<CAPTION>
                                                         1998          1999
            (IN THOUSANDS) DECEMBER 31,               ----------    ----------
<S>                                                   <C>           <C>
Machinery and equipment.............................  $  871,870    $  956,122
Subscriber devices..................................     497,238       407,188
Furniture and fixtures..............................      59,996        61,801
Leasehold improvements..............................      20,609        23,489
Land, buildings, and building improvements..........       3,157         3,161
                                                      ----------    ----------
          Total cost................................  $1,452,870    $1,451,761
                                                      ==========    ==========
</TABLE>

     The Company does not manufacture any of the subscriber devices or related
transmitting and computerized terminal equipment used in the Company's
operations. The Company purchases its subscriber devices primarily from
Motorola. The Company anticipates that subscriber devices will continue to be
available for purchase from Motorola and other sources, consistent with normal
manufacturing and delivery lead times.

     During the first quarter of 1999, the Company made the decision to narrow
its focus to its North American operations and, as a result, made the decision
to sell or otherwise dispose of its operations in Spain. During third quarter of
1999, all operations of the Company's majority-owned Spanish subsidiaries were
ceased. The Company's interest in its Spanish subsidiaries was sold in the first
quarter of 2000 for minimal proceeds. As a result of the Company's decision to
sell or otherwise dispose of its Spanish subsidiaries, the Company recorded a
provision of $18 million during the year ended December 31, 1999, for the
impairment of the assets of the Company's majority-owned subsidiaries, the
effect of which was to write-off the Company's net investment in its Spanish
subsidiaries. The amount of the provision was based on the Company's estimate of
the value of its net investment in the Spanish subsidiaries, which did not
materially differ from the proceeds received upon the sale of the subsidiaries
in the first quarter of 2000. No cash costs have been incurred or are expected
as a result of the provision for the impairment of the assets of the Company's
Spanish subsidiaries, and no additional charges are expected to be required.

     Effective April 1, 1999, the Company changed the depreciable lives for its
subscriber devices and certain network equipment. The Company changed the
depreciable lives of its subscriber devices from three years to two years and
the depreciable life of certain of its network equipment from seven years to ten
years. The changes resulted from a review by the Company of the historical usage
periods of its subscriber devices and its network equipment and the Company's
expectations regarding future usage periods for subscriber devices considering
current and projected technological advances. The Company has determined that
the appropriate useful life of its subscriber devices is two years as a result
of technological advances, customer desire for new pager technology, and the
Company's decreasing ability to redeploy older pager models. As a result of
these changes, the net loss increased by $78 million, or $0.75 per share (basic
and diluted), during the year ended December 31, 1999.

     Effective January 1, 1997, the Company shortened the depreciable lives of
its subscriber devices from four to three years, and revised the related
residual values. This change increased net loss for the year ended December 31,
1997 by $17 million and net loss per share by $0.16 (basic and diluted).

     During the year ended December 31, 1997, the Company recorded a provision
of $13 million to write down certain subscriber devices to their net realizable
value.

                                      F-38
<PAGE>   187
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

6.  OTHER NON-CURRENT ASSETS

     The cost of other non-current assets consisted of the following:

<TABLE>
<CAPTION>
                                                            1998        1999
              (IN THOUSANDS) DECEMBER 31,                 --------    --------
<S>                                                       <C>         <C>
Licenses and frequencies................................  $473,211    $477,659
Goodwill................................................    50,495      37,922
Restricted cash invested in money market instruments, at
  fair value (Note 7)...................................    33,461      34,485
Other intangible assets.................................    13,920       7,647
Other non-current assets................................    58,285      51,301
                                                          --------    --------
          Total cost....................................  $629,372    $609,014
                                                          ========    ========
</TABLE>

     Licenses and frequencies consist of amounts paid in conjunction with the
purchase of three nationwide narrowband personal communications services (PCS)
frequencies at a Federal Communications Commission (FCC) auction held in 1994,
amounts paid in conjunction with the purchase of blocks of two-way 900 MHz
specialized mobile radio (SMR) major trading area based licenses, amounts paid
to purchase exclusive rights to certain of the SMR frequencies from incumbent
operators, and amounts paid to secure other licenses.

     The Company adopted the provisions of Statement of Position 98-5 "Reporting
on the Costs of Start-Up Activities" (SOP 98-5), effective January 1, 1999. SOP
98-5 requires the expensing of all start-up costs as incurred, as well as the
writing off of the remaining unamortized balance of capitalized start-up costs
at the date of adoption of SOP 98-5. The impact of the Company's adoption of SOP
98-5 was a charge of $37 million representing the cumulative effect of a change
in accounting principle to write-off all unamortized start-up costs as of
January 1, 1999, and an increase in net loss of $21 million, or $0.20 per share
(basic and diluted), for the year ended December 31, 1999.

7.  LONG-TERM OBLIGATIONS

     Long-term obligations consisted of the following:

<TABLE>
<CAPTION>
                                                              1998                        1999
                                                    -------------------------   -------------------------
                                                    (CARRYING     (ESTIMATED    (CARRYING     (ESTIMATED
           (IN THOUSANDS) DECEMBER 31,                VALUE)     FAIR VALUE)      VALUE)     FAIR VALUE)
<S>                                                 <C>          <C>            <C>          <C>
Borrowings under Credit Agreement.................  $  565,000     $     --     $  745,000     $     --
10% Senior Subordinated Notes due October 15,
  2008............................................     500,000      477,473        500,000      145,000
10.125% Senior Subordinated Notes due August 1,
  2007............................................     400,000      382,964        400,000      116,000
8.875% Senior Subordinated Notes due February 1,
  2006............................................     300,000      292,484        300,000       87,000
Other.............................................      50,137           --         58,127           --
                                                    ----------                  ----------
                                                     1,815,137                   2,003,127
Obligations in default and classified as current
  (Note 2)........................................          --                   1,945,000
                                                    ----------                  ----------
                                                    $1,815,137                  $   58,127
                                                    ==========                  ==========
</TABLE>

                                      F-39
<PAGE>   188
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     As of December 31, 1999, PageNet had $ 745 million of borrowings
outstanding under its Credit Agreement. The Company's maximum borrowings under
the Credit Agreement are permanently reduced beginning on June 30, 2001, by the
following amounts: 2001 -- $150 million; 2002 -- $200 million; 2003 -- $250
million; and 2004 -- $147 million. The Company's Credit Agreement expires on
December 31, 2004. As discussed in Note 2, the Company is in default of the
covenants of its domestic debt agreements and is precluded from any additional
borrowings under the Credit Agreement.

     Under the Credit Agreement, the Company may designate all or a portion of
outstanding borrowings to be either a Base Rate Loan or a loan based on the
London Interbank Offered Rate (LIBOR). As of December 31, 1999, the Company had
designated all $745 million of borrowings as LIBOR loans, which bear interest at
a rate equal to LIBOR plus a spread of 2.00%. The interest rates for the $745
million of LIBOR loans as of December 31, 1999 ranged from 7.94% to 8.17%. As a
result of the defaults described in Note 2, the Company's lenders have the right
to collect default interest up to 12.00% for the Company's outstanding balances
under its Credit Agreement.

     The Credit Agreement prohibits the Company from paying cash dividends or
other cash distributions to shareowners. The Credit Agreement also prohibits the
Company from paying more than a total of $2 million in connection with the
purchase of Common Stock owned by employees whose employment with the Company is
terminated. The Credit Agreement contains other covenants that, among other
things, limit the ability of the Company and its subsidiaries to incur
indebtedness, engage in transactions with affiliates, dispose of assets, and
engage in mergers, consolidations, and other acquisitions without the prior
written consent of its lenders. Amounts owing under the Credit Agreement are
secured by a security interest in substantially all of the Company's assets, the
assets of the Company's subsidiaries, and the capital stock of the subsidiaries
of the Company (other than the international subsidiaries and Vast).

     The two credit agreements of the Company's Canadian subsidiaries provide
for total borrowings of approximately $75 million. As of December 31, 1999,
approximately $56 million of borrowings were outstanding under the credit
facilities. Such borrowings were collateralized by $34 million of restricted
cash included in other non-current assets. Additional borrowings are available
under these facilities, provided such borrowings are either collaterized or
certain financial conditions are met. Maximum borrowings that may be outstanding
under the credit facilities are permanently reduced beginning on March 31, 2002,
by the following amounts: 2002 -- $1 million; 2003 -- $6 million; and
2004 -- $68 million. Both credit agreements expire on December 31, 2004.

     The 8.875% Notes, the 10.125% Notes, and the 10% Notes are redeemable on or
after February 1, 1999; August 1, 2000; and October 15, 2001; respectively, at
the option of the Company, in whole or in part from time to time, at certain
prices declining annually to 100 percent of the principal amount on or after
February 1, 2002; August 1, 2003; and October 15, 2004; respectively, plus
accrued interest. The 8.875% Notes, the 10.125% Notes, and the 10% Notes are
subordinated in right of payment to all senior debt, and contain various
covenants that, among other things, limit the ability of the Company and its
subsidiaries to incur indebtedness, pay dividends, engage in transactions with
affiliates, sell assets, and engage in mergers, consolidations, and other
acquisitions without the prior written consent of its lenders. The fair values
of the 8.875% Notes, the 10.125% Notes, and the 10% Notes were based on quoted
market prices and discounted cash flow analyses. The fair values of the amounts
outstanding under the Credit Agreement and other indebtedness cannot be
reasonably estimated due to the debt defaults and covenant violations of the
Company.

                                      F-40
<PAGE>   189
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     On May 14, 1997, PageNet redeemed all $200 million of its outstanding
11.75% Senior Subordinated Notes (11.75% Notes), utilizing funds borrowed under
the Company's Credit Agreement. The Company recorded an extraordinary loss of
$16 million in the second quarter of 1997 on the early retirement of the 11.75%
Notes. The extraordinary loss was comprised of the redemption premium of $12
million and the write-off of unamortized issuance costs of $4 million.

8.  INCOME TAXES

     For the years ended December 31, 1997, 1998, and 1999, the Company had no
provision or benefit for income taxes because of the Company's inability to
benefit from its net operating losses. The valuation allowance for deferred tax
assets increased by $56 million, $58 million, and $109 million during the years
ended December 31, 1997, 1998, and 1999, respectively. Significant components of
the Company's deferred tax assets and liabilities are as follows:

<TABLE>
<CAPTION>
                                                         1998         1999
             (IN THOUSANDS) DECEMBER 31,               ---------    ---------
<S>                                                    <C>          <C>
Deferred tax assets:
     Net operating loss carryforwards................  $ 197,983    $ 294,580
     Deferred revenue................................      5,982        7,411
     Provision for asset impairment..................         --        6,941
     Bad debt reserve................................      3,768        6,670
     Other tax credit carryforwards..................        679          664
     Other...........................................     28,482       18,405
                                                       ---------    ---------
          Total deferred tax assets..................    236,894      334,671
     Valuation allowance.............................   (201,496)    (310,909)
                                                       ---------    ---------
          Net deferred tax assets....................     35,398       23,762
Deferred tax liabilities:
     Depreciation....................................    (23,450)      (3,977)
     Amortization....................................    (11,948)     (19,785)
                                                       ---------    ---------
          Total deferred tax liabilities.............    (35,398)     (23,762)
                                                       ---------    ---------
                                                       $      --    $      --
                                                       =========    =========
</TABLE>

     As of December 31, 1999, the Company has net operating loss carryforwards
of approximately $755 million that expire in years 2001 through 2019. Of such
amounts, $5 million expire in 2001 and $3 million expire in 2002. The bankruptcy
proceeding is expected to result in the elimination of substantially all of the
tax benefit of the net operating loss carryforwards and certain other tax
attributes of the Company. Loss before income taxes attributable to the
Company's foreign operations was $14 million, $12 million, and $11 million for
the years ended December 31, 1997, 1998, and 1999.

9.  STOCK OPTIONS

     The 1982 Incentive Stock Option Plan, as amended (1982 Plan), for officers
and key employees of the Company provides for the granting of stock options
intended to qualify as Incentive Stock Options (ISOs) to purchase Common Stock
at not less than 100% of the fair market value on the date the option is
granted, as determined by the Board of Directors. No further options may be
granted under the 1982 Plan. As of December 31, 1999, options for 228,487 shares
were exercisable under the 1982 Plan. All options outstanding and exercisable
under the 1982 Plan are fully vested.

                                      F-41
<PAGE>   190
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Options granted were exercisable immediately, or in installments as the
Board of Directors determined at the time it granted such options, and have a
duration of ten years from the date of grant. Any stock issued is subject to
repurchase at the option of the Company, which occurs at the exercise price for
the unvested portion of the shares issued and at fair market value, as defined
or allowed in the Stock Option Agreement, for the vested portion. Such options
vest ratably over a five-year period from the date they first become
exercisable. However, in the event of a change in ownership control of the
Company, all options vest immediately.

     The 1991 Stock Option Plan (1991 Plan) for officers and key employees of
the Company provides for the granting of ISOs and non-statutory options to
purchase Common Stock at not less than 100% of the fair market value on the date
the options are granted. The 1991 Plan is administered by the Compensation and
Management Development Committee of the Board of Directors (the Committee).
Approximately 3 million shares remained available for grant under the 1991 Plan
as of December 31, 1999. A total of 4,034,671 shares were vested and exercisable
under the 1991 Plan as of December 31, 1999. Options granted under the 1991 Plan
are non-transferable except by the laws of descent and distribution and are
exercisable upon vesting, which occurs in installments, as the Board of
Directors or the Committee may determine at the time it grants such options.

     On May 21, 1998, the Company's shareowners approved an amendment to its
1991 Plan to broaden the group of employees eligible to receive stock options
under such plan to include all employees of the Company and its subsidiaries. On
May 22, 1998, PageNet granted approximately 2 million options under the 1991
Plan to approximately 2,700 employees at an exercise price of $13.94 per share,
which represented the market price of the Company's Common Stock at the date of
grant. Since that time, grants of stock options to eligible new employees have
been made the first day of the next quarter after the quarter in which they were
hired.

     The Amended and Restated 1992 Directors Compensation Plan (Directors'
Plan), for non-employee Directors of the Company, provides for the granting of
non-statutory options to purchase Common Stock at not less than 100% of the fair
market value on the date the options are granted. The Directors' Plan is
administered by the Committee. The total number of shares of Common Stock with
respect to which options may be granted under the Directors' Plan may not exceed
750,000. Approximately 300,000 shares remain available for grant under the
Directors' Plan as of December 31, 1999. A total of 225,000 shares were vested
and exercisable as of December 31, 1999. Options granted under the Directors'
Plan are non-transferable except by the laws of descent and distribution and are
exercisable upon vesting, which occurs in installments, as the Board of
Directors or the Committee may determine at the time it grants such options.

     With respect to the 1991 Plan and the Directors' Plan, notwithstanding the
above, ten business days before a merger or a change in the ownership control of
the Company or a sale of substantially all the assets of the Company, all
options issued vest immediately and become exercisable in full; upon a merger or
a change in ownership control of the Company or the sale of substantially all
the assets of the Company, all options issued under the 1991 Plan and Directors'
Plan which have not been exercised terminate. The Merger Agreement provides that
all the Company's stock options will be converted into options for shares of
Arch at a formula which would reduce the number of options outstanding by
8,944,792 and increase the exercise price range by $6.18 to $120.24.

     On June 12, 1997, the Company offered an election to its employees with
options granted during 1995 and 1996 under the 1991 Plan to cancel such options
and accept a lesser number of new options at a lower exercise price, with the
vesting dates being restarted with the new grant dates. As a result of the
election by certain of its employees, PageNet canceled approximately 3 million
of options with exercise prices ranging from $13.69 to $26.50 and granted
approximately 1 million of options to the same optionees with an exercise price
of $8.25 per share.

                                      F-42
<PAGE>   191
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     Information concerning options as of December 31, 1997, 1998, and 1999 is
as follows:

<TABLE>
<CAPTION>
                                                    1997            1998            1999
                                                ------------    ------------    ------------
<S>                                             <C>             <C>             <C>
Outstanding at January 1....................       5,968,605       5,687,335       8,579,568
     Granted................................       3,435,873       5,066,000       4,214,987
     Canceled...............................      (3,705,609)     (1,241,982)     (2,505,716)
     Exercised..............................         (11,534)       (931,785)        (69,724)
                                                ------------    ------------    ------------
Outstanding at December 31..................       5,687,335       8,579,568      10,219,115
                                                ============    ============    ============
Exercisable at December 31..................       2,450,795       3,253,511       4,588,158
                                                ============    ============    ============
Option price range-options outstanding......    $2.67-$25.50    $2.67-$25.50    $0.88-$17.13
Option price range-options exercised........    $2.73-$ 9.25    $2.67-$14.38    $2.67-$ 5.13
</TABLE>

     Weighted-average exercise prices are as follows:

<TABLE>
<CAPTION>
                                                                 1997      1998      1999
                                                                ------    ------    ------
<S>                                                             <C>       <C>       <C>
Outstanding at January 1....................................    $15.90    $ 9.47    $10.98
     Granted................................................      9.54     12.59      4.54
     Canceled...............................................     19.89     12.79     10.17
     Exercised..............................................      7.49      8.16      3.12
Outstanding at December 31..................................      9.47     10.98      8.56
Exercisable at December 31..................................      9.12      9.85      9.31
</TABLE>

     Certain information is being presented based on a range of exercise prices
as of December 31, 1999, as follows:

<TABLE>
<CAPTION>
                                          $0.88-$6.00    $6.03-$8.13    $8.25-$12.63    $12.94-$17.13
                                          -----------    -----------    ------------    -------------
<S>                                       <C>            <C>            <C>             <C>
Number of shares outstanding..........     2,567,374      2,308,960       2,338,101       3,004,680
Weighted-average exercise price.......    $     3.40     $     6.43      $     9.83      $    13.62
Weighted-average remaining contractual
  life................................          8.55           8.01            7.23            8.01
Number of shares exercisable..........       792,465        800,140       1,632,993       1,362,560
Weighted-average exercise price of
  shares exercisable..................    $     3.63     $     6.89      $     9.63      $    13.66
</TABLE>

     The Company adopted the pro forma disclosure provisions of the Statement of
Financial Accounting Standards No. 123, "Accounting for Stock-Based
Compensation" (SFAS 123) in 1996. As required by SFAS 123, pro forma information
regarding net loss and net loss per share has been determined as if the Company
had accounted for employee stock options and stock-based awards granted
subsequent to December 31, 1994 under the fair value method provided for under
SFAS 123. The weighted-average fair value of stock options granted during 1997,
1998, and 1999 was $5.98, $7.21, and $1.22, respectively. The fair value for the
stock options granted to officers and key employees of the Company after January
1, 1995 was estimated at the date of the grant using the Black-Scholes option
pricing model with the following assumptions: risk-free interest ranging from
5.46% to 6.89% for 1997, ranging from 4.09% to 5.72% for 1998, and ranging from
4.54% to 6.13% for 1999; a dividend yield of 0%; volatility factors of the
expected market price of the Company's Common Stock ranging from 54.4% to 57.6%
for 1997, ranging from 56.8% to 60.0% for 1998, and 75.0% for 1999; and a
weighted average expected life of each option ranging from 5.5 years to 6.7
years for 1997 and 1998, and ranging from 2.0 years to 6.0 years for 1999.

                                      F-43
<PAGE>   192
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     For purposes of the pro forma disclosures, the estimated fair market value
of the options and stock-based awards is amortized to expense over the vesting
period. The Company's pro forma information is as follows (in thousands, except
for net loss per common share information):

<TABLE>
<CAPTION>
                                                       1997            1998            1999
                                                     ---------       ---------       ---------
<S>                                   <C>            <C>             <C>             <C>
Net loss                              As reported    $(156,947)      $(162,009)      $(299,002)
                                        Pro forma    $(172,884)      $(179,834)      $(301,586)
Net loss per common share             As reported    $   (1.53)      $   (1.57)      $   (2.88)
  (basic and diluted)                   Pro forma    $   (1.68)      $   (1.74)      $   (2.90)
</TABLE>

     Because SFAS 123 is applicable only to options and stock-based awards
granted subsequent to December 31, 1994, its pro forma effect will not be fully
reflected until 2001.

10.  COMMITMENTS

     The Company has operating leases for office and transmitting sites with
lease terms ranging from a month to approximately ten years. There are no
significant renewal or purchase options. Total rent expense for 1997, 1998, and
1999 was approximately $70 million, $81 million, and $101 million, respectively.

     The following is a schedule by year of future minimum rental payments
required under operating leases that have remaining noncancelable lease terms in
excess of one year as of December 31, 1999.

<TABLE>
<CAPTION>
          YEAR ENDING DECEMBER 31: (IN THOUSANDS)
          ---------------------------------------
<S>                                                           <C>
          2000..............................................  $27,997
          2001..............................................   19,788
          2002..............................................   14,855
          2003..............................................   10,229
          2004..............................................    7,080
          Later years.......................................    8,163
                                                              -------
                    Total minimum payments required.........  $88,112
                                                              =======
</TABLE>

11.  CONTINGENCIES

     The Company is involved in various lawsuits arising in the normal course of
business. In management's opinion, the ultimate outcome of these lawsuits will
not have a material adverse effect on PageNet's business, financial position, or
results of operations.

12.  COMMON STOCK AND NET LOSS PER SHARE

     Net loss per share amounts are computed based on the weighted average
number of common shares outstanding. The number of shares used to compute per
share amounts for the years ended December 31, 1997, 1998, and 1999, was 103
million, 103 million, and 104 million, respectively. The average number of
options to purchase shares of the Company's Common Stock during the years ended
December 31, 1997, 1998, and 1999, were 6 million, 8 million, and 10 million,
respectively, at exercise prices ranging from $0.88 per share to $25.50 per
share. These stock options were not included in the computation of diluted
earnings per share because the effect of assuming their exercise would have been
antidilutive.

     The Company has 275 million authorized shares, of which 250 million are
Common Stock and 25 million are preferred stock. As of December 31, 1999,
approximately 15 million shares of Common Stock were reserved for the issuance
of shares under the Company's stock option and other plans. As of December 31,
1999, there were no preferred shares issued or outstanding.

                                      F-44
<PAGE>   193
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     On May 23, 1996, the Company's shareowners approved an employee stock
purchase plan of up to 2 million shares of the Company's Common Stock. Under the
employee stock purchase plan, an employee may elect to purchase shares of the
Company's Common Stock at the end of a predetermined period at a price equal to
85% of the fair market value of the Company's Common Stock at the beginning or
end of such period, whichever is lower. The Company implemented two-year
employee stock purchase plans on January 1, 1997 and 1998, and a one-year plan
on January 1, 1999. The Company discontinued the employee stock purchase plan
effective December 31, 1999.

13.  STATEMENT OF CASH FLOWS INFORMATION

     Cash and cash equivalents include highly liquid debt instruments with an
original maturity of three months or less. As of December 31, 1999, cash
equivalents also include investments in money market instruments, which are
carried at fair market value. Cash payments made for interest for the years
ended December 31, 1997, 1998, and 1999 were approximately $144 million, $136
million, and $147 million, respectively, net of $16 million, $22 million, and
$24 million, respectively, of interest capitalized during the years ended
December 31, 1997, 1998 and 1999. During the year ended December 31, 1998,
PageNet utilized $13 million of deposits made in 1998 for the purchase of
subscriber devices. There were no significant federal or state income taxes paid
or refunded for the years ended December 31, 1997, 1998, and 1999.

14.  EMPLOYEE BENEFIT PLANS

     The Company has adopted a plan to provide retirement benefits under the
provisions of Section 401(k) of the Internal Revenue Code (the Code) for all
employees who have completed a specified term of service. Effective January 1,
1996, Company contributions equal 50% of employee contributions up to a maximum
of 6% of the employee's compensation. Employees may elect to contribute up to
15% of their compensation on a pre-tax basis, not to exceed the maximum amount
allowed as determined by the Code. The Company's contributions aggregated
approximately $2 million in 1997, $3 million in 1998, and $2 million in 1999.

15.  STOCK PURCHASE RIGHTS

     In September 1994, the Board of Directors of the Company adopted a Stock
Purchase Rights Plan and declared a distribution of one common share purchase
right for each outstanding share of the Company's Common Stock. As of September
28, 1994, certificates representing shares of the Company's Common Stock also
represent ownership of one common share purchase right. In January 1999, the
Board of Directors of the Company amended the Rights Plan to eliminate certain
provisions held to be unenforceable under Delaware law.

     Generally, the rights will become exercisable only if a person or group (i)
acquires 20% or more of the Company's Common Stock or (ii) announces a tender
offer that would result in ownership of 20% or more of the Company's Common
Stock or (iii) is declared to be an "Adverse Person" by the Board of Directors.
Adverse Person includes any person or group who owns at least 10% of the
Company's Common Stock and attempts an action that would adversely impact the
Company. The Company's Board of Directors can waive the application of the stock
purchase rights under certain circumstances. In connection with the approval of
the Merger Agreement, the Company's Board of Directors waived such application
as it would have related to the Merger.

     Once a person or group has acquired 20% or more of the outstanding Common
Stock of the Company, each right may entitle its holder (other than the 20%
person or group) to purchase, at an exercise price of $150, shares of Common
Stock of the Company (or of any company that acquires the

                                      F-45
<PAGE>   194
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

Company) at a price equal to 50% of their current market price. Under certain
circumstances, the Board of Directors may exchange the rights for Common Stock
(or equivalent securities) on a one-for-one basis.

     Until declaration of an Adverse Person, or ten (10) days after public
announcement that any person or group has acquired 20% or more of the Common
Stock of the Company, the rights are redeemable at the option of the Board of
Directors. Thereafter, they may be redeemed by the Board of Directors in
connection with certain acquisitions not involving any acquiring person or
Adverse Person or in certain circumstances following a disposition of shares by
the acquiring person or Adverse Person. The redemption price is $0.01 per right.
The rights will expire on September 27, 2004, unless redeemed prior to that
date.

16.  SEGMENT INFORMATION

     The Company has determined that it has two reportable segments, traditional
paging operations and advanced messaging operations. The Company's basis for the
segments relates to the types of products and services each segment provides.
The traditional paging segment consists of the traditional display and
alphanumeric services, which are basic one-way services, and 1 1/2-way paging
services. The advanced messaging operating segment consists of the Company's new
2-way wireless messaging services, VoiceNow service, and the operations of Vast,
which includes wireless integration products, consumer content, and wireless
software development and sales.

                                      F-46
<PAGE>   195
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     The following table presents certain information related to the Company's
business segments as of December 31, 1997, 1998, and 1999 or for the years ended
December 31, 1997, 1998, and 1999.

<TABLE>
<CAPTION>
                                                            1997             1998             1999
                   (IN THOUSANDS)                        ----------       ----------       ----------
<S>                                                      <C>              <C>              <C>
Total Revenues:
     Traditional Paging(1)...........................    $  960,290       $1,041,603       $  973,658
     Advanced Messaging..............................           686            4,424           16,065
                                                         ----------       ----------       ----------
                                                         $  960,976       $1,046,027       $  989,723
                                                         ==========       ==========       ==========
Depreciation and amortization:
     Traditional Paging(1)...........................    $  276,590       $  266,319       $  310,347
     Advanced Messaging..............................        12,852           14,940           16,754
                                                         ----------       ----------       ----------
                                                         $  289,442       $  281,259       $  327,101
                                                         ==========       ==========       ==========
Operating income (loss):
     Traditional Paging(1)...........................    $   31,399(2)    $   17,406(3)    $  (41,190)(4)
     Advanced Messaging..............................       (23,891)         (39,726)         (74,198)
                                                         ----------       ----------       ----------
                                                         $    7,508       $  (22,320)      $ (115,388)
                                                         ==========       ==========       ==========
Adjusted EBITDA(5):
     Traditional Paging(1)...........................    $  320,589       $  357,725       $  263,424
     Advanced Messaging..............................       (11,039)         (24,786)         (57,444)
                                                         ----------       ----------       ----------
                                                         $  309,550       $  332,939       $  205,980
                                                         ==========       ==========       ==========
Capital expenditures:
     Traditional Paging(1)...........................    $  224,459       $  193,234       $  121,779
     Advanced Messaging..............................       103,906           74,949          113,147
                                                         ----------       ----------       ----------
                                                         $  328,365       $  268,183       $  234,926
                                                         ==========       ==========       ==========
Net interest expense(6):
     Traditional Paging(1)...........................    $   90,458       $   74,729       $   65,107
     Advanced Messaging..............................        57,233           66,963           81,912
                                                         ----------       ----------       ----------
                                                         $  147,691       $  141,692       $  147,019
                                                         ==========       ==========       ==========
Total assets:
     Traditional Paging(1)...........................    $1,047,246       $  945,621       $  746,515
     Advanced Messaging..............................       549,987          635,623          676,045
                                                         ----------       ----------       ----------
                                                         $1,597,233       $1,581,244       $1,422,560
                                                         ==========       ==========       ==========
</TABLE>

---------------
(1) The international operations of the Company currently consist entirely of
    traditional paging services and accordingly are included in PageNet's
    traditional paging business segment.

(2) Operating income for the traditional paging business segment for 1997
    includes a $13 million provision to write down certain subscriber devices to
    their net realizable value. See Note 5.

(3) Operating income for the traditional paging business segment for 1998
    includes a restructuring charge of $74 million. See Note 4.

(4) Operating loss for the traditional paging business segment for 1999 includes
    a partial reversal of the restructuring charge of $24 million and a
    provision for asset impairment of $18 million. See Notes 4 and 5,
    respectively.

                                      F-47
<PAGE>   196
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

(5) Adjusted EBITDA, as determined by the Company, does not reflect other
    non-operating (income) expense, provision for asset impairment,
    restructuring charge, extraordinary items, and cumulative effect of a change
    in accounting principle.

(6) Net interest expense is interest expense less interest income.

     Adjusted EBITDA is not defined in generally accepted accounting principles
and should not be considered in isolation or as a substitute for a measure of
performance in accordance with generally accepted accounting principles.

17.  QUARTERLY FINANCIAL RESULTS (UNAUDITED)

     Quarterly financial information for the two years ended December 31, 1999
is summarized below.

<TABLE>
<CAPTION>
                                                   FIRST        SECOND       THIRD      FOURTH
                                                  QUARTER       QUARTER     QUARTER     QUARTER
   (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)      ---------     ---------   ---------   ---------
<S>                                              <C>           <C>         <C>         <C>
  1998
     Services, rent, and maintenance
       revenues................................  $ 229,861     $ 235,172   $ 239,689   $ 240,802
     Product sales.............................     25,889        29,329      25,382      19,903
                                                 ---------     ---------   ---------   ---------
          Total revenues.......................    255,750       264,501     265,071     260,705
     Cost of products sold.....................    (21,103)      (23,161)    (18,276)    (15,132)
                                                 ---------     ---------   ---------   ---------
                                                   234,647       241,340     246,795     245,573
  Operating income (loss)......................    (56,605)(1)    19,803      17,998      (3,516)
     Net loss..................................    (92,372)(1)   (15,619)    (16,428)    (37,590)
     Net loss per share (basic and diluted)....      (0.90)(1)     (0.15)      (0.16)      (0.36)
  1999
     Services, rent, and maintenance
       revenues................................  $ 241,868     $ 231,635   $ 223,063   $ 200,782
     Product sales.............................     21,692        22,930      24,347      23,406
                                                 ---------     ---------   ---------   ---------
          Total revenues.......................    263,560       254,565     247,410     224,188
     Cost of products sold.....................    (16,177)      (10,462)    (16,374)    (14,888)
                                                 ---------     ---------   ---------   ---------
                                                   247,383       244,103     231,036     209,300
     Operating income (loss)...................    (16,505)(2)   (58,248)    (13,499)    (27,136)(3)
     Loss before cumulative effect of a change
       in accounting principle.................    (51,758)(2)   (95,311)    (49,488)    (64,999)(3)
     Cumulative effect of a change in
       accounting principle....................    (37,446)           --          --          --
     Net loss..................................    (89,204)(2)   (95,311)    (49,488)    (64,999)(3)
     Net loss per share (basic and diluted):...
     Loss before cumulative effect of a change
       in accounting principle.................      (0.50)(2)     (0.92)      (0.48)      (0.64)(3)
     Cumulative effect of a change in
       accounting principle....................      (0.36)           --          --          --
     Net loss per share........................      (0.86)(2)     (0.92)      (0.48)      (0.64)(3)
</TABLE>

---------------
(1) Operating loss for the first quarter of 1998 includes a restructuring charge
    of $74 million. See Note 4.

(2) Operating loss for the first quarter of 1999 includes a provision for asset
    impairment of $18 million. See Notes 5 and 6.

(3) Operating loss for the fourth quarter of 1999 includes a partial reversal of
    the restructuring charge of $24 million. See Note 4.

                                      F-48
<PAGE>   197

                              PAGING NETWORK, INC.

                          CONSOLIDATED BALANCE SHEETS
                    (IN THOUSANDS, EXCEPT SHARE INFORMATION)
                                  (UNAUDITED)

<TABLE>
<CAPTION>
                                                              DECEMBER 31,     JUNE 30,
                                                                  1999           2000
                                                              ------------    -----------
<S>                                                           <C>             <C>
                           ASSETS
Current assets:
  Cash and cash equivalents.................................   $   32,144     $    71,111
  Accounts receivable, less allowance for doubtful
     accounts...............................................       84,476          82,782
  Inventories...............................................        8,687           6,340
  Prepaid expenses and other assets.........................        5,623          15,810
                                                               ----------     -----------
     Total current assets...................................      130,930         176,043
Property, equipment, and leasehold improvements, at cost....    1,451,761       1,394,510
  Less accumulated depreciation.............................     (684,648)       (735,119)
                                                               ----------     -----------
     Net property, equipment, and leasehold improvements....      767,113         659,391
Other non-current assets, at cost...........................      609,014         610,734
  Less accumulated amortization.............................      (84,497)        (94,949)
                                                               ----------     -----------
     Net other non-current assets...........................      524,517         515,785
                                                               ----------     -----------
                                                               $1,422,560     $ 1,351,219
                                                               ==========     ===========
            LIABILITIES AND SHAREOWNERS' DEFICIT
Current liabilities:
  Long-term debt in default.................................   $1,945,000     $ 1,946,450
  Accounts payable..........................................       80,889          70,813
  Accrued expenses..........................................       50,146          46,153
  Accrued interest..........................................       42,532          99,185
  Customer deposits.........................................       15,927          14,296
  Deferred revenue..........................................       19,778          24,837
                                                               ----------     -----------
     Total current liabilities..............................    2,154,272       2,201,734
                                                               ----------     -----------
Long-term obligations, non-current portion..................       58,127          59,507
Commitments and contingencies
Shareowners' deficit:
  Common Stock -- $.01 par, authorized 250,000,000 shares;
     103,960,240 and 104,242,567 shares issued and
     outstanding as of December 31, 1999 and June 30, 2000,
     respectively...........................................        1,040           1,042
  Paid-in capital...........................................      134,161         134,742
  Accumulated other comprehensive income....................          745           1,614
  Accumulated deficit.......................................     (925,785)     (1,047,420)
                                                               ----------     -----------
     Total shareowners' deficit.............................     (789,839)       (910,022)
                                                               ----------     -----------
                                                               $1,422,560     $ 1,351,219
                                                               ==========     ===========
</TABLE>

                             See accompanying notes
                                      F-49
<PAGE>   198

                              PAGING NETWORK, INC.

                     CONSOLIDATED STATEMENTS OF OPERATIONS
                  (IN THOUSANDS, EXCEPT PER SHARE INFORMATION)
                                  (UNAUDITED)

<TABLE>
<CAPTION>
                                                 THREE MONTHS ENDED        SIX MONTHS ENDED
                                                      JUNE 30,                 JUNE 30,
                                                --------------------    ----------------------
                                                  1999        2000        1999         2000
                                                --------    --------    ---------    ---------
<S>                                             <C>         <C>         <C>          <C>
Services, rent and maintenance revenues.......  $231,635    $184,884    $ 473,503    $ 396,157
Product sales.................................    22,930      18,635       44,622       42,999
                                                --------    --------    ---------    ---------
     Total revenues...........................   254,565     203,519      518,125      439,156
Cost of products sold.........................   (10,462)    (13,043)     (26,639)     (26,236)
                                                --------    --------    ---------    ---------
                                                 244,103     190,476      491,486      412,920
Operating expenses:
  Services, rent and maintenance..............    63,782      62,541      130,672      125,240
  Selling.....................................    21,962      15,221       45,992       35,322
  General and administrative..................    87,939      80,164      176,229      159,934
  Depreciation and amortization...............   128,668      58,988      195,548      121,825
  Provision for asset impairment..............        --          --       17,798           --
                                                --------    --------    ---------    ---------
     Total operating expenses.................   302,351     216,914      566,239      442,321
                                                --------    --------    ---------    ---------
Operating loss................................   (58,248)    (26,438)     (74,753)     (29,401)
Other income (expense):
  Interest expense............................   (37,770)    (46,768)     (73,801)     (93,123)
  Interest income.............................       715         824        1,305          938
  Other non-operating income (expense)........        (8)        (25)         180          (49)
                                                --------    --------    ---------    ---------
     Total other expense......................   (37,063)    (45,969)     (72,316)     (92,234)
                                                --------    --------    ---------    ---------
Loss before cumulative effect of a change in
  accounting principle........................   (95,311)    (72,407)    (147,069)    (121,635)
Cumulative effect of a change in accounting
  principle...................................        --          --      (37,446)          --
                                                --------    --------    ---------    ---------
Net loss......................................  $(95,311)   $(72,407)   $(184,515)   $(121,635)
                                                ========    ========    =========    =========
Net loss per share (basic and diluted):
Loss before cumulative effect of a change in
  accounting principle........................  $  (0.92)   $  (0.69)   $   (1.42)   $   (1.17)
Cumulative effect of a change in accounting
  principle...................................        --          --        (0.36)          --
                                                --------    --------    ---------    ---------
  Net loss per share..........................  $  (0.92)   $  (0.69)   $   (1.78)   $   (1.17)
                                                ========    ========    =========    =========
</TABLE>

                             See accompanying notes
                                      F-50
<PAGE>   199

                              PAGING NETWORK, INC.

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
                                  (UNAUDITED)

<TABLE>
<CAPTION>
                                                                 SIX MONTHS ENDED
                                                                     JUNE 30,
                                                              ----------------------
                                                                1999         2000
                                                              ---------    ---------
<S>                                                           <C>          <C>
Operating activities:
  Net loss..................................................  $(184,515)   $(121,635)
     Adjustments to reconcile net loss to net cash provided
      by operating activities:
       Provision for asset impairment.......................     17,798           --
       Cumulative effect of a change in accounting
        principle...........................................     37,446           --
       Depreciation.........................................    186,545      112,641
       Amortization.........................................      9,003        9,184
       Provision for doubtful accounts......................     12,630       14,698
       Amortization of debt issuance costs..................      2,260        2,304
       Other................................................       (180)          49
  Changes in operating assets and liabilities:
       Accounts receivable..................................      3,155      (13,004)
       Inventories..........................................     (4,194)       2,347
       Prepaid expenses and other assets....................      1,762      (10,187)
       Accounts payable.....................................     26,911      (10,076)
       Accrued expenses and accrued interest................     (6,160)      52,611
       Accrued restructuring costs..........................       (933)          --
       Customer deposits and deferred revenue...............        (12)       3,428
                                                              ---------    ---------
Net cash provided by operating activities...................    101,516       42,360
                                                              ---------    ---------
Investing activities:
  Capital expenditures......................................   (134,814)      (6,727)
  Payments for spectrum licenses............................     (2,546)          --
  Restricted cash invested in money market instruments......         --         (655)
  Other, net................................................     (6,749)       1,406
                                                              ---------    ---------
Net cash used in investing activities.......................   (144,109)      (5,976)
                                                              ---------    ---------
Financing activities:
  Borrowings of long-term obligations.......................    144,637        3,640
  Repayments of long-term obligations.......................    (94,979)      (1,640)
  Proceeds from exercise of stock options...................      1,201          583
                                                              ---------    ---------
Net cash provided by financing activities...................     50,859        2,583
                                                              ---------    ---------
Net increase in cash and cash equivalents...................      8,266       38,967
Cash and cash equivalents at beginning of period............      3,077       32,144
                                                              ---------    ---------
Cash and cash equivalents at end of period..................  $  11,343    $  71,111
                                                              =========    =========
</TABLE>

                             See accompanying notes
                                      F-51
<PAGE>   200

                              PAGING NETWORK, INC.

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                 JUNE 30, 2000
                                  (UNAUDITED)

1.  THE COMPANY AND MERGER AGREEMENT

     Paging Network, Inc. (the Company) is a provider of wireless messaging
services throughout the United States and the U.S. Virgin Islands, Puerto Rico,
and Canada. The Company provides service in all 50 states and the District of
Columbia, including service in the 100 most populated markets in the United
States. The Company also owns a minority interest in a wireless messaging
company in Brazil.

     On November 7, 1999, the Company signed a definitive agreement (the Merger
Agreement) to merge (the Merger) with Arch Communications Group, Inc. (Arch).
The Merger Agreement was subsequently amended on January 7, 2000, May 10, 2000,
and July 23, 2000. Under terms of the Merger Agreement, as amended, the
Company's senior subordinated notes, along with all accrued interest thereon,
will be exchanged for common stock of Arch representing 46.1% of the common
stock of the combined company, and the Company's common stock will be converted
into common stock representing 5.0% of the common stock of the combined company.
The Merger Agreement also provides for the Company to distribute 80.5% of its
interest in Vast Solutions, Inc. (Vast), a wholly-owned subsidiary of the
Company, to holders of the Company's senior subordinated notes and common stock.
Holders of the senior subordinated notes will receive common stock of Vast
representing 60.5% of the equity of Vast, while holders of the Company's common
stock will receive common stock of Vast representing 20% of the equity of Vast.
The remaining interest in Vast will be held by the combined company following
the Merger.

     As more fully discussed in Note 2, the Company will seek to complete the
Merger through the Company's plan of reorganization filed in conjunction with
the Company's bankruptcy filing in July 2000. Consummation of the Merger is also
subject to customary regulatory review. The Company and Arch have received
approval from the Department of Justice and the Federal Communications
Commission to proceed with the Merger. If the Merger Agreement is terminated
after one party pursues an alternative offer, a plan of reorganization of the
Company other than the one contemplated in the Merger Agreement is filed by the
Company and/or confirmed by a bankruptcy court, or under other specified
circumstances, either the Company or Arch may be required to pay a termination
fee of $40 million.

2.  CHAPTER 11 REORGANIZATION AND BASIS OF PRESENTATION

     The accompanying financial statements have been prepared on a going concern
basis, which contemplates the realization of assets and the satisfaction of
liabilities in the normal course of business. The Company incurred losses of
$157 million, $162 million, and $299 million during the years ended December 31,
1997, 1998, and 1999, respectively, and $72 million and $122 million,
respectively, during the three and six months ended June 30, 2000. The Company's
deteriorating financial results and liquidity caused it to be in default of the
covenants of all of its domestic debt agreements. On February 2, 2000 and August
1, 2000, the Company failed to make the semi-annual interest payments on its
8.875% senior subordinated notes due 2006 (8.875% Notes) and its 10.125% senior
subordinated notes due 2007 (10.125% Notes), and on April 17, 2000, the Company
failed to make the semi-annual interest payment on its 10% senior subordinated
notes due 2008 (10% Notes). The Company also violated several of the financial
and other covenants of its domestic revolving credit facility (the Credit
Agreement). As a result of these defaults, the Company's bondholders and the
lenders under the Credit Agreement had the right to demand at any time that the
Company immediately pay its outstanding indebtedness in full. On July 14, 2000,
three senior subordinated noteholders commenced an involuntary proceeding
against the Company under Chapter 11 of the United States Bankruptcy Code (the
Bankruptcy Code).

     On July 24, 2000 (the Petition Date), the Company consented to an order for
relief which, in effect, converted the bankruptcy case filed on July 14, 2000 to
a voluntary Chapter 11 case. Also on the Petition Date, the Company's domestic
subsidiaries except for Vast filed voluntary petitions for relief under the

                                      F-52
<PAGE>   201
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                                 JUNE 30, 2000
                                  (UNAUDITED)

Bankruptcy Code (such subsidiaries and the Company are hereafter referred to
collectively as the "Debtors"). Subsequent to the Petition Date, the Debtors are
operating as debtors-in- possession and are subject to the jurisdiction of the
United States Bankruptcy Court for the District of Delaware (the Bankruptcy
Court). Chapter 11 is the principal business reorganization chapter of the
Bankruptcy Code. Under Chapter 11 of the Bankruptcy Code, a debtor is authorized
to reorganize its business for the benefit of its creditors and stockholders. In
addition to permitting rehabilitation of the debtor, another goal of Chapter 11
is to promote equality of treatment of creditors and equity security holders of
equal rank with respect to the restructuring of debt. In furtherance of these
two goals, upon the filing of a petition for reorganization under Chapter 11,
section 362(a) of the Bankruptcy Code generally provides for an automatic stay
of substantially all acts and proceedings against the debtor and its property,
including all attempts to collect claims or enforce liens that arose prior to
the commencement of the debtor's case under Chapter 11.

     The Bankruptcy Court has exercised supervisory powers over the operations
of the Debtors with respect to the employment of attorneys, investment bankers
and other professionals, and transactions out of the Debtors' ordinary course of
business or otherwise requiring Bankruptcy Court approval under the Bankruptcy
Code. The Debtors have been paying undisputed obligations that have arisen
subsequent to the Petition Date on a timely basis. Since the Petition Date, the
Bankruptcy Court has entered orders, among other things, allowing the Debtors
(i) to pay certain customer refunds and deposits in the ordinary course of
business, (ii) to pay wages, salaries and benefits owing to employees, and (iii)
to pay pre-petition obligations owed to continuing vendors as such obligations
come due.

     On July 25, 2000, the Debtors filed a Joint Plan of Reorganization and
disclosure statement which provide for the implementation of the Merger as the
Debtors' plan of reorganization. A hearing with respect to the Bankruptcy
Court's approval of the Debtors' disclosure statement is scheduled for September
7, 2000, at which time the Bankruptcy Court will determine if the Debtors' Joint
Plan of Reorganization providing for the implementation of the Merger will be
submitted to the creditors and shareholders of the Debtors for approval.

     As of July 31, 2000, the Company had approximately $66 million in cash.
Upon commencement of the Chapter 11 case, the Company obtained a
debtor-in-possession loan facility (the DIP Facility) from the current lenders
under the Credit Agreement which provided for additional secured borrowings by
both the Company and Vast not to exceed $50 million in the aggregate, subject to
certain limitations as set forth in the loan agreement. Borrowings under the DIP
Facility bear interest at prime plus 2.5% for outstanding borrowings up to $15
million, and at prime plus 3.0% for outstanding borrowings in excess of $15
million, due monthly. All amounts outstanding under the DIP Facility are due the
earlier of (i) the confirmation of the Debtors' Joint Plan of Reorganization, or
(ii) November 30, 2000. The Company believes that its existing cash, the cash
expected to be generated from operations, and the cash available under the DIP
Facility is sufficient to meet its obligations, except for the cash interest
payments due under the Notes, through the completion of the Merger. However, if
the Company's financial results continue to deteriorate, the Merger is delayed,
or other unforeseen events occur, the Company may not have sufficient liquidity
to meet its obligations through the completion of the Merger. If the Merger is
not completed, the Company would likely be required to consider a stand-alone
restructuring, asset sales, transactions with other potential merger parties or
acquirers, or liquidation. In addition, if the Merger is not completed, the
Company would likely incur significant charges for asset impairments and
restructuring its obligations. The accompanying financial statements do not
include any adjustments relating to the possible future effects on the
recoverability and classification of assets or the amounts and classification of
liabilities that might be necessary should the Merger not be completed.

                                      F-53
<PAGE>   202
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                                 JUNE 30, 2000
                                  (UNAUDITED)

3.  UNAUDITED INTERIM FINANCIAL STATEMENTS

     The interim consolidated financial information contained herein is
unaudited but, in the opinion of management, includes all adjustments, which are
of a normal recurring nature, except for the cumulative effect of a change in
accounting principle discussed in Note 4 and the provision for asset impairment
discussed in Note 5, necessary for a fair presentation of the financial
position, results of operations, and cash flows for the periods presented. These
financial statements have been prepared in accordance with accounting principles
generally accepted in the United States for interim financial information and
the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly,
these financial statements do not include all of the information and footnotes
required by accounting principles generally accepted in the United States for
complete financial statements. The balance sheet as of December 31, 1999, has
been derived from the audited financial statements as of that date. Results of
operations for the periods presented herein are not necessarily indicative of
results of operations for the entire year. These financial statements and
related notes should be read in conjunction with the financial statements and
notes included in the Company's Annual Report on Form 10-K for the year ended
December 31, 1999.

4.  ACCOUNTING CHANGES

     The Company adopted the provisions of Statement of Position 98-5 "Reporting
on the Costs of Start-Up Activities" (SOP 98-5), effective January 1, 1999. SOP
98-5 requires the expensing of all start-up costs as incurred, as well as
writing off the remaining unamortized balance of capitalized start-up costs at
the date of adoption of SOP 98-5. The impact of the Company's adoption of SOP
98-5 was a charge of $37 million representing the cumulative effect of a change
in accounting principle to write-off all unamortized start-up costs as of
January 1, 1999.

     Effective April 1, 1999, the Company changed the depreciable lives for its
subscriber devices and certain network equipment. The Company changed the
depreciable lives of its subscriber devices from three years to two years and
the depreciable life of certain of its network equipment from seven years to ten
years. The changes resulted from a review by the Company of the historical usage
periods of its subscriber devices and its network equipment and the Company's
expectations regarding future usage periods for subscriber devices considering
current and projected technological advances. The Company has determined that
the appropriate useful life of its subscriber devices is two years as a result
of technological advances, customer desire for new pager technology, and the
Company's decreasing ability to redeploy older pager models. As a result of
these changes, net loss increased by $69 million, or $0.66 per share (basic and
diluted), for the three and six months ended June 30, 1999.

5.  PROVISION FOR ASSET IMPAIRMENT

     During the first quarter of 1999, the Company made the decision to narrow
its focus to its North American operations and, as a result, made the decision
to sell or otherwise dispose of its operations in Spain. During the third
quarter of 1999, all operations of the Company's majority-owned Spanish
subsidiaries were ceased. The Company's interest in its Spanish subsidiaries was
sold in the first quarter of 2000 for minimal proceeds. As a result of the
Company's decision to sell or otherwise dispose of its Spanish subsidiaries, the
Company recorded a provision of $18 million during the six months ended June 30,
1999, for the impairment of the assets of the Company's majority-owned
subsidiaries, the effect of which was to write-off the Company's net investment
in its Spanish subsidiaries. The amount of the provision was based on the
Company's estimate of the value of its net investment in the Spanish
subsidiaries, which did not materially differ from the proceeds received upon
the sale of the subsidiaries in the first quarter of 2000. No cash costs have
been incurred or are expected as a result of the provision for

                                      F-54
<PAGE>   203
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                                 JUNE 30, 2000
                                  (UNAUDITED)

the impairment of the assets of the Company's Spanish subsidiaries, and no
additional charges are expected to be required.

6.  INCOME TAXES

     For the three and six months ended June 30, 1999 and 2000, the Company had
no provision or benefit for income taxes because of the Company's inability to
benefit from its net operating losses.

7.  COMMON STOCK AND NET LOSS PER SHARE

     Net loss per share amounts are computed based on the weighted average
number of common shares outstanding. The number of shares used to compute per
share amounts for the three months ended June 30, 1999 and 2000, were 104
million. The number of shares used to compute per share amounts for the six
months ended June 30, 1999 and 2000, were 104 million. The average number of
options to purchase shares of the Company's Common Stock during the three and
six months ended June 30, 1999 was 10 million, at exercise prices ranging from
$2.73 per share to $25.50 per share. The average number of options to purchase
shares of the Company's Common Stock during the three and six months ended June
30, 2000, was 10 million, at exercise prices ranging from $0.81 per share to
$17.13 per share. These stock options were not included in the computation of
diluted earnings per share because the effect of assuming their exercise would
have been antidilutive.

     The Company has 275 million authorized shares, of which 250 million are
Common Stock and 25 million are preferred stock. As of June 30, 2000, there were
no preferred shares issued or outstanding.

8.  COMPREHENSIVE LOSS

     Comprehensive loss for the three and six months ended June 30, 1999 and
2000, is as follows (in thousands):

<TABLE>
<CAPTION>
                                                    THREE MONTHS              SIX MONTHS
                                                   ENDED JUNE 30,           ENDED JUNE 30,
                                                --------------------    ----------------------
                                                  1999        2000        1999         2000
                                                --------    --------    ---------    ---------
<S>                                             <C>         <C>         <C>          <C>
Net loss......................................  $(95,311)   $(72,407)   $(184,515)   $(121,635)
Foreign currency translation adjustments......      (166)        810       (1,007)         869
                                                --------    --------    ---------    ---------
          Total comprehensive loss............  $(95,477)   $(71,597)   $(185,522)   $(120,766)
                                                ========    ========    =========    =========
</TABLE>

9.  STATEMENT OF CASH FLOWS INFORMATION

     Cash and cash equivalents include highly liquid debt instruments with an
original maturity of three months or less. As of June 30, 2000, cash equivalents
also include investments in money market instruments, which are carried at fair
market value. Cash payments made for interest during the six months ended June
30, 1999 and 2000, were approximately $70 million and $34 million, respectively,
net of interest capitalized during the six months ended June 30, 1999 and 2000
of $11 million and $1 million, respectively. There were no significant federal
or state income taxes paid or refunded for the six months ended June 30, 1999
and 2000.

10.  SEGMENT INFORMATION

     The Company has two reportable segments, traditional paging operations and
advanced messaging operations. The Company's basis for the segments relates to
the types of products and services each

                                      F-55
<PAGE>   204
                              PAGING NETWORK, INC.

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                                 JUNE 30, 2000
                                  (UNAUDITED)

segment provides. The traditional paging segment includes the traditional
display and alphanumeric services, which are basic one-way services, and
1 1/2-way paging services. The advanced messaging segment consists of the
Company's new 2-way wireless messaging services, VoiceNow service, and the
operations of Vast, which include wireless integration products and wireless
software development and sales.

     The following table presents certain information related to the Company's
business segments for the three and six months ended June 30, 1999 and 2000.

<TABLE>
<CAPTION>
                                                     THREE MONTHS             SIX MONTHS
                                                    ENDED JUNE 30,          ENDED JUNE 30,
                                                 --------------------    ---------------------
                                                   1999        2000        1999         2000
                                                 --------    --------    ---------    --------
<S>                                              <C>         <C>         <C>          <C>
Total Revenues:
  Traditional Paging(1)........................  $251,142    $196,170    $ 511,808    $424,655
  Advanced Messaging...........................     3,423       7,349        6,317      14,501
                                                 --------    --------    ---------    --------
                                                 $254,565    $203,519    $ 518,125    $439,156
                                                 ========    ========    =========    ========
Operating income (loss):
  Traditional Paging(1)........................  $(46,525)   $ (1,000)   $ (54,246)(2) $ 12,101
  Advanced Messaging...........................   (11,723)    (25,438)     (20,507)    (41,502)
                                                 --------    --------    ---------    --------
                                                 $(58,248)   $(26,438)   $ (74,753)   $(29,401)
                                                 ========    ========    =========    ========
Adjusted EBITDA (3):
  Traditional Paging(1)........................  $ 81,506    $ 47,186    $ 157,857    $114,534
  Advanced Messaging...........................   (11,086)    (14,636)     (19,264)    (22,110)
                                                 --------    --------    ---------    --------
                                                 $ 70,420    $ 32,550    $ 138,593    $ 92,424
                                                 ========    ========    =========    ========
</TABLE>

---------------
(1) The international operations of the Company currently consist entirely of
    traditional paging services and accordingly are included in the Company's
    traditional paging business segment.

(2) Operating loss for the traditional paging business segment for the first six
    months of 1999 includes a provision for asset impairment of $18 million. See
    Note 5.

(3) Adjusted EBITDA, as determined by the Company, does not reflect other
    non-operating income (expense), provision for asset impairment, and
    cumulative effect of a change in accounting principle.

     Adjusted EBITDA is not defined in generally accepted accounting principles
and should not be considered in isolation or as a substitute for a measure of
performance in accordance with generally accepted accounting principles.

                                      F-56
<PAGE>   205

                         REPORT OF INDEPENDENT AUDITORS

The Board of Directors
MobileMedia Communications, Inc.

     We have audited the accompanying consolidated balance sheets of MobileMedia
Communications, Inc. and Subsidiaries ("MobileMedia") as of December 31, 1997
and 1998, and the related consolidated statements of operations, stockholders'
equity (deficit) and cash flows for each of the three years in the period ended
December 31, 1998. These financial statements are the responsibility of the
Company's management. Our responsibility is to express an opinion on these
consolidated financial statements based on our audits.

     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

     In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the consolidated financial position of
MobileMedia Communications, Inc. and Subsidiaries at December 31, 1997 and 1998
and the consolidated results of their operations and cash flows for each of the
three years in the period ended December 31, 1998 in conformity with generally
accepted accounting principles.

     The accompanying financial statements have been prepared assuming that
MobileMedia will continue as a going concern. As more fully described in Note 1,
on January 30, 1997, MobileMedia Corporation and substantially all of its
subsidiaries filed voluntary petitions for reorganization under Chapter 11 of
the United States Bankruptcy Code in the United States Bankruptcy Court for the
District of Delaware (the Bankruptcy Court). Additionally, as more fully
described in Note 11, on April 8, 1997, the Federal Communications Commission
("FCC") issued a Public Notice commencing an administrative hearing into the
qualification of MobileMedia to remain a licensee. These events, and
circumstances relating to the Chapter 11 filing with the Bankruptcy Court,
including MobileMedia's highly leveraged financial structure, non-compliance
with certain covenants of loan agreements with banks and note indentures, net
working capital deficiency and recurring losses from operations, raise
substantial doubt about MobileMedia's ability to continue as a going concern.
Although MobileMedia is currently operating the business as a debtor-in-
possession under the jurisdiction of the Bankruptcy Court, the continuation of
the business as a going concern is contingent upon, among other things, the
ability to (a) gain approval of the creditors and confirmation by the Bankruptcy
Court of a plan of reorganization, (b) maintain compliance with all covenants
under the debtor-in-possession financing agreement, (c) achieve satisfactory
levels of future operating profit and (d) retain FCC qualification as a
licensee. The financial statements do not include any adjustments to reflect the
possible future effects on the recoverability and classification of assets or
the amounts and classification of liabilities that may result from the outcome
of these uncertainties.

                                            /S/ ERNST & YOUNG LLP

MetroPark, New Jersey
February 12, 1999, except for the eighth paragraph of Note 1 and
  the second paragraph of Note 6, as to which the date is March 26, 1999
  and the ninth paragraph of Note 1, as to which the date is April 12, 1999

                                      F-57
<PAGE>   206

               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES
                          CONSOLIDATED BALANCE SHEETS
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                    DECEMBER 31,
                                                              -------------------------    MARCH 31,
                                                                 1997          1998          1999
                                                              -----------   -----------   -----------
                                                                                          (UNAUDITED)
<S>                                                           <C>           <C>           <C>
                                               ASSETS
Current assets
    Cash and cash equivalents...............................  $    10,920   $     1,218   $        --
    Accounts receivable (less allowance for uncollectible
       accounts of $26,500, $15,000 and $14,893 in 1997,
       1998 and 1999, respectively).........................       55,432        38,942        37,270
    Inventories.............................................          868         2,192         1,609
    Prepaid expense.........................................        5,108         5,523         5,261
    Other current assets....................................        2,783         4,855         4,900
                                                              -----------   -----------   -----------
         Total current assets...............................       75,111        52,730        49,040
                                                              -----------   -----------   -----------
Investment in net assets of equity affiliate................        1,788         1,400            --
Property and equipment, net.................................      257,937       219,642       225,566
Intangible assets, net......................................      295,358       266,109       258,793
Other assets................................................       24,940        21,573        20,610
                                                              -----------   -----------   -----------
         Total assets.......................................  $   655,134   $   561,454   $   554,009
                                                              ===========   ===========   ===========

                                LIABILITIES AND STOCKHOLDERS' DEFICIT
Liabilities not subject to compromise
    Debtor-In-Possession (DIP) credit facility..............  $    10,000   $        --   $     5,000
    Accrued restructuring costs.............................        4,897         5,163         7,197
    Accrued wages, benefits and payroll.....................       11,894        12,033         9,944
    Book cash overdraft.....................................           --            --         1,255
    Accounts payable--post petition.........................        2,362         1,703         7,334
    Accrued interest........................................        4,777         3,692         3,566
    Accrued expenses and other current liabilities..........       35,959        35,735        30,061
    Current income taxes payable............................           --         2,871         1,200
    Advance billing and customer deposits...................       34,252        28,554        28,892
    Deferred gain on tower sale.............................           --        68,444        67,278
                                                              -----------   -----------   -----------
         Total liabilities not subject to compromise........      104,141       158,195       161,727
                                                              -----------   -----------   -----------
Liabilities subject to compromise
    Accrued wages, benefits and payroll taxes...............          562           647           476
    Accrued interest........................................       18,450        17,579        17,578
    Accounts payable--pre petition..........................       19,646        15,410        15,351
    Accrued expenses and other current liabilities..........       20,663        15,285        12,231
    Debt....................................................    1,075,681       905,681       905,681
    Other liabilities.......................................        2,915            --            --
                                                              -----------   -----------   -----------
         Total liabilities subject to compromise............    1,137,917       954,602       951,317
                                                              -----------   -----------   -----------
    Deferred tax liabilities................................        2,655         2,655         2,655
Stockholders' deficit
    Common stock (1 share, no par value, issued and
       outstanding at December 31, 1997 and 1998 and March
       31, 1999)............................................           --            --            --
Additional paid-in-capital..................................      676,025       676,025       676,025
Accumulated deficit--pre petition...........................   (1,154,420)   (1,154,420)   (1,154,420)
Accumulated deficit--post petition..........................     (111,184)      (75,603)      (83,295)
                                                              -----------   -----------   -----------
         Total stockholders' deficit........................     (589,579)     (553,998)     (561,690)
                                                              -----------   -----------   -----------
         Total liabilities and stockholders' deficit........  $   655,134   $   561,454   $   554,009
                                                              ===========   ===========   ===========
</TABLE>

                            See accompanying notes.
                                      F-58
<PAGE>   207

               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                                   THREE MONTHS
                                                YEAR ENDED DECEMBER 31,           ENDED MARCH 31,
                                           ----------------------------------   -------------------
                                              1996         1997        1998       1998       1999
                                           -----------   ---------   --------   --------   --------
                                                                                    (UNAUDITED)
<S>                                        <C>           <C>         <C>        <C>        <C>
Revenue
     Services, rents and maintenance.....  $   568,892   $ 491,174   $423,059   $108,542   $100,631
     Product sales.......................       71,818      36,218     26,622      6,621      5,193
                                           -----------   ---------   --------   --------   --------
          Total revenues.................      640,710     527,392    449,681    115,163    105,824
Cost of products sold....................      (72,595)    (35,843)   (22,162)    (5,513)    (3,516)
                                           -----------   ---------   --------   --------   --------
                                               568,115     491,549    427,519    109,650    102,308
Operating expenses
     Services, rents and maintenance.....      144,050     139,333    111,589     28,899     27,077
     Selling.............................       96,817      69,544     61,106     15,703     14,136
     General and administrative..........      218,607     179,599    133,003     34,908     31,481
     Reduction of liabilities subject to
       compromise........................           --          --    (10,461)        --     (3,050)
     Impairment of long-lived assets.....      792,478          --         --         --         --
     Restructuring costs.................        4,256      19,811     18,624      4,558      5,067
     Depreciation........................      136,434     110,376     86,624     24,193     20,501
     Amortization........................      212,264      29,862     29,835      7,478      7,468
     Amortization of deferred gain on
       tower sale........................           --          --     (1,556)        --     (1,167)
                                           -----------   ---------   --------   --------   --------
          Total operating expenses.......    1,604,906     548,525    428,764    115,739    101,513
                                           -----------   ---------   --------   --------   --------
Operating Income (loss)..................   (1,036,791)    (56,976)    (1,245)    (6,089)       795
Other income (expense)
     Interest expense, net...............      (92,663)    (67,611)   (53,043)   (14,626)   (10,018)
     Gain (loss) on sale/disposal of
       assets............................           68           3     94,165          1       (323)
     Other...............................           --          --       (338)        --      2,063
                                           -----------   ---------   --------   --------   --------
          Total other expense............      (92,595)    (67,608)    40,784    (14,625)    (8,278)
                                           -----------   ---------   --------   --------   --------
Income (loss) before income taxes
  (benefit)..............................   (1,129,386)   (124,584)    39,539    (20,714)    (7,483)
Income taxes (benefit)...................      (69,442)         --      3,958         --        209
                                           -----------   ---------   --------   --------   --------
Net income (loss)........................  $(1,059,944)  $(124,584)  $ 35,581   $(20,714)  $ (7,692)
                                           ===========   =========   ========   ========   ========
</TABLE>

                            See accompanying notes.
                                      F-59
<PAGE>   208

               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES
      CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT)
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                 ADDITIONAL   ACCUMULATED     ACCUMULATED
                                                  PAID IN       DEFICIT         DEFICIT
                                                  CAPITAL     PRE-PETITION   POST-PETITION      TOTAL
                                                 ----------   ------------   -------------   -----------
<S>                                              <C>          <C>            <C>             <C>
Balance at December 31, 1995...................   $659,829    $   (81,076)     $       0     $   578,753
Capital contribution from MobileMedia..........     12,800             --             --          12,800
Net loss.......................................         --     (1,059,944)            --      (1,059,944)
                                                  --------    -----------      ---------     -----------
Balance at December 31, 1996...................    672,629     (1,141,020)             0        (468,391)
Capital contribution from MobileMedia..........      3,396             --             --           3,396
Net loss.......................................         --        (13,400)      (111,184)       (124,584)
                                                  --------    -----------      ---------     -----------
Balance at December 31, 1997...................    676,025     (1,154,420)      (111,184)       (589,579)
Net income.....................................         --             --         35,581          35,581
                                                  --------    -----------      ---------     -----------
Balance at December 31, 1998...................    676,025     (1,154,420)       (75,603)       (553,998)
Net loss (unaudited)...........................         --             --         (7,692)         (7,692)
                                                  --------    -----------      ---------     -----------
Balance at March 31, 1999 (unaudited)..........   $676,025    $(1,154,420)     $ (83,295)    $  (561,690)
                                                  ========    ===========      =========     ===========
</TABLE>

                            See accompanying notes.
                                      F-60
<PAGE>   209

               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                                     THREE MONTHS ENDED
                                                     YEAR ENDED DECEMBER 31,              MARCH 31,
                                               -----------------------------------   -------------------
                                                  1996         1997        1998        1998       1999
                                               -----------   ---------   ---------   --------   --------
                                                                                         (UNAUDITED)
<S>                                            <C>           <C>         <C>         <C>        <C>
Operating activities
    Net income (loss)........................  $(1,059,944)  $(124,584)  $  35,581   $(20,714)  $ (7,692)
Adjustments to reconcile net loss to net cash
  provided by (used in) Operating activities:
    Depreciation and amortization............      348,698     140,238     116,459     31,672     27,969
    Amortization of deferred gain on tower
       sale..................................           --          --      (1,556)        --     (1,167)
    Income tax benefit.......................      (69,442)         --          --         --         --
    Accretion of note payable discount.......       16,792       1,485          --         --         --
    Provision for uncollectible accounts.....       56,556      65,181      14,841      4,981      2,131
    Reduction of liabilities subject to
       compromise............................           --          --     (10,461)        --     (3,050)
    Recognized gain on sale of tower
       assets................................           --          --     (94,165)        --         --
    Impairment of long-lived assets..........      792,478          --          --         --         --
    Undistributed earnings of affiliate,
       net...................................          160          69         (87)        22         --
Change in operating assets and liabilities:
    Accounts receivable......................      (55,965)    (53,904)      1,649      2,813       (459)
    Inventories..............................        2,433      12,514      (1,324)       407        583
    Prepaid expenses and other assets........       12,145        (686)        590     (1,052)     1,028
    Accounts payable, accrued expenses and
       other liabilities.....................       13,283     (25,393)     (7,065)     1,413     (1,791)
                                               -----------   ---------   ---------   --------   --------
    Net cash provided by (used in) operating
       activities............................       57,194      14,920      54,462     19,542     17,552
                                               -----------   ---------   ---------   --------   --------
Investing activities:
    Construction and capital expenditures,
       including net changes in pager
       assets................................     (161,861)    (40,556)    (53,867)    (4,854)   (26,806)
    Net proceeds from the sale of tower
       assets................................           --          --     169,703         --         --
    Net proceeds from the sale of investment
       in Abacus.............................           --          --          --         --      1,400
    Net loss on the disposal of fixed
       assets................................           --          --          --         --        381
    Acquisition of businesses................     (866,460)         --          --         --         --
                                               -----------   ---------   ---------   --------   --------
Net cash provided by (used in) investing
  activities.................................   (1,028,321)    (40,556)    115,836     (4,854)   (25,025)
                                               -----------   ---------   ---------   --------   --------
Financing activities:
    Book cash overdraft......................           --          --          --         --      1,255
    Capital contribution by MobileMedia
       Corporation...........................       12,800       3,396          --         --         --
    Payment of debt issue costs..............       (6,939)         --          --         --         --
    Borrowing from revolving credit
       facilities............................      580,250          --          --         --         --
    Repayments on revolving credit
       facilities............................           --          --    (170,000)        --         --
    Borrowing from DIP credit facilities.....           --      47,000          --         --      5,000
    Repayments on DIP credit facilities......           --     (37,000)    (10,000)   (10,000)        --
                                               -----------   ---------   ---------   --------   --------
Net cash provided by (used in) financing
  activities.................................      586,111      13,396    (180,000)   (10,000)     6,255
                                               -----------   ---------   ---------   --------   --------
Net (decrease) increase in cash, cash
  equivalents designated and cash designated
  for the MobileComm acquisition.............     (385,016)    (12,240)     (9,702)     4,688     (1,218)
Cash and cash equivalents at beginning of
  period.....................................      408,176      23,160      10,920     10,920      1,218
                                               -----------   ---------   ---------   --------   --------
Cash and cash equivalents at end of period...  $    23,160   $  10,920   $   1,218   $ 15,608   $      0
                                               ===========   =========   =========   ========   ========
</TABLE>

                            See accompanying notes.
                                      F-61
<PAGE>   210

               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                             (DOLLARS IN THOUSANDS)

1.  CHAPTER 11 REORGANIZATION AND BASIS OF PRESENTATION

     On January 30, 1997 (the "Petition date"), MobileMedia Corporation
("Parent"), its wholly owned subsidiary MobileMedia Communications, Inc., and
all seventeen of MobileMedia Communications, Inc.'s subsidiaries ("MobileMedia")
(collectively with Parent, the "Debtors"), filed for protection under Chapter 11
of Title 11 of the United States Code (the "Bankruptcy Code"). The Debtors are
operating as debtors-in-possession and are subject to the jurisdiction of the
United States Bankruptcy Court for the District of Delaware (the "Bankruptcy
Court"). Chapter 11 is the principal business reorganization chapter of the
Bankruptcy Code. Under Chapter 11 of the Bankruptcy Code, a debtor is authorized
to reorganize its business for the benefit of its creditors and stockholders. In
addition to permitting rehabilitation of the debtor, another goal of Chapter 11
is to promote equality of treatment of creditors and equity security holders of
equal rank with respect to the restructuring of debt. In furtherance of these
two goals, upon the filing of a petition for reorganization under Chapter 11,
section 362(a) of the Bankruptcy Code generally provides for an automatic stay
of substantially all acts and proceedings against the debtor and its property,
including all attempts to collect claims or enforce liens that arose prior to
the commencement of the debtor's case under Chapter 11.

     The Bankruptcy Court has exercised supervisory powers over the operations
of the Debtors with respect to the employment of attorneys, investment bankers
and other professionals, and transactions out of the Debtors' ordinary course of
business or otherwise requiring bankruptcy court approval under the Bankruptcy
Code. The Debtors have been paying undisputed obligations that have arisen
subsequent to the Petition date on a timely basis.

     Since the Petition date, the Bankruptcy Court has entered orders, among
other things, allowing the Debtors (i) to pay certain customer refunds and
deposits in the ordinary course of business, (ii) to pay wages, salaries and
benefits owing to employees, and (iii) to pay specified pre-petition taxes owing
to various governmental entities. On February 6, 1997, the Bankruptcy Court
entered an order authorizing the Debtors to pay approximately $46,000 in
pre-petition amounts owing to certain essential vendors.

     Under the Bankruptcy Code, the Debtors may elect to assume or reject real
estate leases, employment contracts, personal property leases, service contracts
and other unexpired executory pre-petition leases and contracts, subject to
Bankruptcy Court approval. Assumption of a contract requires the Debtors, among
other things, to cure all defaults under the contract, including payment of all
pre-petition liabilities. Rejection of a contract constitutes a breach of that
contract as of the moment immediately preceding the Chapter 11 filing and the
other party has the right to assert a general, unsecured claim against the
bankruptcy estate for damages arising out of such breach. These parties may also
seek to assert post-petition administrative claims against the Debtors to the
extent that the Debtors utilize the collateral or services of such parties
subsequent to the commencement of the Chapter 11 proceedings. The Debtors cannot
presently determine or reasonably estimate the ultimate liability that may
result from payments required to cure defaults under assumed leases and
contracts or from the filing of claims for all leases and contracts which may be
rejected.

     In connection with the Chapter 11 filing, the Debtors notified all known
claimants that pursuant to an order of the Bankruptcy Court, all proofs of
claims, on account of pre-petition obligations, other than for certain
governmental entities, were required to be filed by June 16, 1997 (the "Bar
Date"). As of March 31, 1999, approximately 2,581 proofs of claim had been filed
against the Debtors. Included among the claims filed are claims of unspecified
and undeterminable amounts. The Debtors consider the amounts set forth in
certain proofs of claim to be inaccurate estimates of the Debtors' liabilities.
As of March 31, 1999, the Debtors had secured orders of the Bankruptcy Court
reducing approximately 1,607 claims filed in an aggregate amount of
approximately $143,362 to an allowed amount of $10,239. As of March 31,

                                      F-62
<PAGE>   211
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

1999, the Debtors had also analyzed and resolved an additional 876 proofs of
claim, representing an aggregate allowed amount of $8,389. The Debtors expect
the objection process to continue.

     On August 20, 1998, MobileMedia announced that it had executed a merger
agreement with Arch Communications Group, Inc. ("Arch"), pursuant to which
MobileMedia Communications, Inc. will be merged with and into a wholly-owned
subsidiary of Arch. Immediately prior to the Merger, Parent will contribute all
of its assets to MobileMedia Communications, Inc. Also on August 20, 1998, the
Debtors filed a First Amended Joint Plan of Reorganization that reflects the
proposed merger with Arch. On September 3, 1998, Arch and MobileMedia executed
an amendment to the merger agreement and the Debtors filed a subsequent Second
Amended Joint Plan of Reorganization. On December 1, 1998 Arch and MobileMedia
executed a second amendment to the merger agreement and on December 2, 1998, the
Debtors filed a Third Amended Joint Plan of Reorganization (the "Plan"). As of
February 9, 1999, Arch and MobileMedia executed a third amendment to the merger
agreement. Under the Plan, the Debtors' secured creditors will receive cash in
an amount equal to their allowed pre-petition claims and the Debtors' unsecured
creditors will receive cash or equity securities of Arch in satisfaction of
their pre-petition claims against the Debtors. Because there are a variety of
conditions precedent to the consummation of the Plan and the merger with Arch,
there can be no assurance that the transactions contemplated thereby will be
consummated.

     In December 1998 and January 1999, MobileMedia solicited the votes of its
creditors on the Plan. 100% of the voting creditors in Class 4 voted to accept
the Plan. As to Allowed Claims in Class 5, 83% in number and 91% in amount of
those voting voted to accept the Plan. Of the Allowed Claims in Class 6 that
voted on the Plan, 968 of such holders (approximately 94% in number and 69% in
amount) voted to accept the Plan, and 61 of such holders (approximately 6% in
number and 31% in amount) voted to reject the Plan.

     Objections to confirmation were filed by New Generation Advisors, Inc.
("New Generation"), Merrill Lynch Phoenix Fund, Inc., Merrill Lynch Corporate
Bond Fund, Inc.--High Income Portfolio and State Street Research High Income
Fund (the "Objectors"). On February 12, 1999, at a continued hearing on
confirmation of the Plan, the Bankruptcy Court ordered MobileMedia to provide
due diligence to a nominee of New Generation, to prepare supplemental disclosure
to the holders of Allowed Claims in Class 6, and to resolicit the votes of such
holders on the Plan. At a hearing held before the Bankruptcy Court on February
18, 1999, the Bankruptcy Court entered an order approving a form of Notice and
Supplemental Disclosure, directing MobileMedia to resolicit the votes of all
holders of Allowed Class 6 Claims and establishing March 23, 1999 as (a) the
Supplemental Voting Deadline for Class 6 and (b) the deadline for any further
objections to confirmation of the Plan arising out of the matters set forth in
the Notice of Supplemental Disclosure. No further objections to the Plan were
received by March 23, 1999. Taking into account the resolicitation of Class 6,
the Plan was accepted by 59.6% in number and 69.3% in dollar amount of voting
Class 6 creditors.

     On March 22, 1999, the Debtors and various other parties (including the
Objectors, Arch, the Committee and the Agent for the Company's pre-petition
secured lenders) executed a stipulation (the "Stipulation") that was approved by
the Bankruptcy Court, effective as of March 23, 1999. The Stipulation resolved
the pending objections to the Plan by providing for the withdrawal of the
Objectors' objections and the waiver of all appeal rights of the Objectors. The
Plan was confirmed by the Bankruptcy Court on April 12, 1999.

     The consolidated financial statements at December 31, 1997, 1998 and March
31, 1999 (unaudited) have been prepared on a going concern basis which assumes
continuity of operations and realization of assets and liquidation of
liabilities in the ordinary course of business. As discussed herein, there are
significant uncertainties relating to the ability of MobileMedia to continue as
a going concern.

                                      F-63
<PAGE>   212
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

The consolidated financial statements do not include any adjustments relating to
the recoverability and classification of recorded asset amounts, or the amounts
and classification of liabilities that might be necessary as a result of the
outcome of the uncertainties discussed herein.

2.  THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

  The Company

     MobileMedia provides paging and wireless messaging services in the United
States, including the 100 largest metropolitan areas.

  Consolidation

     The consolidated financial statements include the accounts of MobileMedia
and its wholly-owned subsidiaries (MobileMedia Communications, Inc.
(California), MobileMedia Paging, Inc., MobileMedia DP Properties, Inc., Dial
Page Southeast, Inc., Radio Call Company of Va., Inc., MobileMedia PCS, Inc.,
Mobile Communications Corporation of America, MobileComm of Florida, Inc.,
MobileComm of Tennessee, Inc., MobileComm of the Midsouth, Inc., MobileComm
Nationwide Operations, Inc., MobileComm of the West, Inc., MobileComm of the
Northeast, Inc., MobileComm of the Southeast, Inc., MobileComm of the Southeast
Private Carrier Operations, Inc., MobileComm of the Southwest, Inc. and FWS
Radio, Inc.). All significant intercompany accounts and transactions have been
eliminated.

  Cash Equivalents

     MobileMedia considers all highly-liquid securities with an original
maturity of less than three months to be cash equivalents.

  Concentrations of Credit Risk

     Financial instruments that potentially subject MobileMedia to
concentrations of credit risk consist principally of temporary cash investments
and accounts receivable. MobileMedia places its cash with high-quality
institutions and, by policy, limits its credit exposure to any one institution.
Although MobileMedia faces significant credit risk from its customers, such risk
does not result from a concentration of credit risk as a result of the large
number of customers which comprise MobileMedia's customer base. MobileMedia
generally does not require collateral or other security to support customer
receivables.

  Inventories

     MobileMedia values inventories at the lower of specific cost or market
value. Inventories consist of pagers held specifically for resale by
MobileMedia.

  Revenue Recognition

     MobileMedia recognizes revenue under service, rent and maintenance
agreements with customers at the time the related services are performed.
Advance billings for services are deferred and recognized as revenue when
earned. MobileMedia leases (as lessor) certain pagers under operating leases.
Sales of pagers are recognized upon delivery.

                                      F-64
<PAGE>   213
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

  Estimates

     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the amounts reported in the financial statements and
accompanying notes. Actual results could differ from these estimates.

  Property and Equipment

     Effective October 1, 1997, MobileMedia shortened the estimated useful life
of pagers from four to three years. This change resulted in additional
depreciation expense of approximately $2,500 in 1997.

     Property and equipment are stated at cost, less accumulated depreciation.

     MobileMedia purchases a significant percentage of its pagers from one
supplier. Any disruption of such supply could have a material impact on
MobileMedia's operations.

     Expenditures for maintenance are charged to expense as incurred.

     Upon retirement of pagers, the cost and related accumulated depreciation
are removed from the accounts and the net book value, if any, is charged to
depreciation expense. Upon the sale of pagers, the net book value is charged to
cost of products sold.

     Depreciation and amortization are computed using the straight-line method
over the following estimated useful lives:

<TABLE>
<S>                                                           <C>
Pagers......................................................     3 years
Radio transmission equipment................................    10 years
Computer equipment..........................................     4 years
Furniture and fixtures......................................     5 years
Leasehold improvements......................................  1-10 years
Buildings...................................................    30 years
</TABLE>

  Intangible Assets

     Intangible assets consist primarily of customer lists and FCC licenses
which are being amortized principally using the straight-line method over
periods ranging from 3 to 25 years. In connection with the impairment writedown
discussed below, MobileMedia revised the useful lives of FCC licenses and
customer lists to 25 years and 3 years, respectively.

  Impairment of Long-Lived Assets

     In accordance with Statement of Financial Accounting Standards No. 121,
"Accounting for the Impairment of Long-Lived Assets and for Long-Lived Assets to
be Disposed Of", MobileMedia records impairment losses on long-lived assets used
in operations when events and circumstances indicate that the assets might be
impaired and the undiscounted cash flows estimated to be generated by those
assets are less than the net book value of those assets. In 1997, MobileMedia
determined impairment existed with respect to its long-lived assets as of
December 31, 1996. Such determination was based upon the existence of adverse
business circumstances, such as MobileMedia's bankruptcy, its 1996 operating
results and the uncertainty associated with the pending FCC proceeding. In July
1998, MobileMedia evaluated the ongoing value of its long-lived assets effective
December 31, 1996 and, based on this evaluation, MobileMedia determined that
intangible assets with a net book value of $1,118,231 were impaired and wrote
them down by $792,478 to their estimated fair value. Fair value was determined
through the

                                      F-65
<PAGE>   214
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

application of generally accepted valuation methods to MobileMedia's projected
cash flows, discounted at an estimated market rate of interest. The remaining
carrying amount of long-lived assets are expected to be recovered based on
MobileMedia's estimates of cash flows. However, it is possible that such
estimates could change based upon the uncertainties of the bankruptcy process
and because future operating and financial results may differ from those
projected which may require further writedowns to fair value.

  Debt Issue Costs

     Debt issue costs, which relate to the long term debt discussed in Note 6,
are reported as "Other assets" in the accompanying balance sheets. Such costs
amounted to $22,939 at December 31, 1997 and $19,295 at December 31, 1998 and
$18,384 at March 31, 1999 (unaudited) and are being amortized on a straight line
basis over the term of the related debt.

  Book Cash Overdraft

     Under MobileMedia's cash management system, checks issued but not presented
to banks occasionally result in overdraft balances for accounting purposes and
are classified as "Book cash overdraft" in the balance sheet.

  Liabilities Subject to Compromise

     Liabilities subject to compromise consists of pre-petition liabilities that
may be affected by a plan of reorganization. In accordance with AICPA Statement
of Position 90-7 "Financial Reporting by Entities in Reorganization under the
Bankruptcy Code", MobileMedia records liabilities subject to compromise based on
the expected amount of the allowed claims related to these liabilities.
Accordingly, in December 1998 and March 1999 MobileMedia reduced such
liabilities by approximately $10,461 and $3,050 (unaudited), respectively, to
reflect changes in estimated allowed claims.

  Restructuring Costs

     Restructuring costs are primarily comprised of professional fees
constituting administrative expenses incurred by MobileMedia as a result of
reorganization under Chapter 11 of the Bankruptcy Code.

  Income Taxes

     Income taxes are accounted for by the liability method in accordance with
Statement of Financial Accounting Standards No. 109, "Accounting for Income
Taxes."

  New Authoritative Accounting Pronouncements

     In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 131 "Disclosures about Segments of an
Enterprise and Related Information" ("SFAS No. 131"), which is effective for
years beginning after December 15, 1997. SFAS No. 131 establishes standards for
the way that public business enterprises report information about operating
segments in annual financial statements and requires that those enterprises
report selected information about operating segments in interim financial
reports. It also establishes standards for related disclosures about products
and services, geographic areas, and major customers. SFAS No. 131 is effective
for financial statements for fiscal years beginning after December 15, 1997.
MobileMedia has adopted SFAS No. 131 as of December 31, 1998. Such adoption did
not have an impact on MobileMedia's financial reporting.

     In April 1998, the Accounting Standards Executive Committee of the
Financial Accounting Standards Board issued Statement of Position 98-5 ("SOP
98-5") "Reporting on the Costs of Start-Up
                                      F-66
<PAGE>   215
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

Activities." SOP 98-5 requires costs of start-up activities and organization
costs to be expensed as incurred. Initial application of SOP 98-5 will be
reported as the cumulative effect of a change in accounting principle.
MobileMedia has adopted SOP 98-5 effective January 1, 1999. Such adoption did
not have any effect on MobileMedia's financial position or results of
operations.

3.  ACQUISITIONS AND DIVESTITURES

     On September 3, 1998, MobileMedia completed the sale of 166 transmission
towers to Pinnacle Towers, Inc. ("Pinnacle") for $170,000 in cash (the "Tower
Sale"). Under the terms of a lease with Pinnacle, MobileMedia will lease antenna
sites located on these towers for an initial period of 15 years at an aggregate
annual rental of $10,700. The sale was accounted for in accordance with
Statement of Financial Accounting Standards No. 28, Accounting for Sales with
Leasebacks, and resulted in a recognized gain of $94,200 and a deferred gain of
$70,000. The deferred gain will be amortized on a straight-line basis over the
initial lease period of 15 years. Subsequent to the sale, MobileMedia
distributed the $170,000 in proceeds to its secured creditors, who had a lien on
such assets.

     On January 4, 1996, MobileMedia completed its acquisition of MobileComm,
BellSouth's paging and wireless messaging unit, and an associated nationwide
2-way narrowband 50/12.5 kHz PCS license, and BellSouth agreed to enter into a
two-year non-compete agreement and a five-year reseller agreement with
MobileMedia (the "MobileComm Acquisition"). The aggregate consideration paid for
the MobileComm Acquisition (excluding fees and expenses and related financing
costs) was approximately $928,709.

     The MobileComm Acquisition has been accounted for as a purchase transaction
in accordance with Accounting Principles Board Opinion No. 16 and, accordingly,
the financial statements for the periods subsequent to January 4, 1996 reflect
the purchase price and transaction costs of $24,328, allocated to tangible and
intangible assets acquired and liabilities assumed based on their estimated fair
values as of January 4, 1996. The allocation of the purchase price is summarized
as follows:

<TABLE>
<CAPTION>
                                                              (IN THOUSANDS)
<S>                                                           <C>
Current assets............................................      $  55,301
Property and equipment....................................        112,986
Intangible assets.........................................        934,269
Other assets..............................................            143
Liabilities assumed.......................................       (149,662)
                                                                ---------
                                                                $ 953,037
                                                                =========
</TABLE>

                                      F-67
<PAGE>   216
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

4.  PROPERTY AND EQUIPMENT

     Property and equipment are summarized as follows:

<TABLE>
<CAPTION>
                                              DECEMBER 31,
                                          --------------------     MARCH 31,
                                            1997        1998         1999
                                          --------    --------    -----------
                                             (IN THOUSANDS)       (UNAUDITED)
<S>                                       <C>         <C>         <C>
Pagers..................................  $196,791    $176,610      $190,903
Radio transmission equipment............   202,296     203,048       204,054
Computer equipment......................    30,896      32,679        32,866
Furniture and fixtures..................    20,918      22,019        21,187
Leasehold improvements..................    14,652      16,516        16,745
Construction in progress................     1,128      11,624        13,140
Land, buildings and other...............     7,911       6,697         6,591
                                          --------    --------      --------
                                           474,592     469,193       485,486
Accumulated depreciation................   216,655     249,551       259,920
                                          --------    --------      --------
Property and equipment, net.............  $257,937    $219,642      $225,566
                                          ========    ========      ========
</TABLE>

5.  INTANGIBLE ASSETS

<TABLE>
<CAPTION>
                                                     DECEMBER 31,                                     MARCH 31, 1999 (UNAUDITED)
                        -----------------------------------------------------------------------   ----------------------------------
                                       1997                                 1998
                        ----------------------------------   ----------------------------------
                                   ACCUMULATED                          ACCUMULATED                          ACCUMULATED
                          COST     AMORTIZATION     NET        COST     AMORTIZATION     NET        COST     AMORTIZATION     NET
                        --------   ------------   --------   --------   ------------   --------   --------   ------------   --------
<S>                     <C>        <C>            <C>        <C>        <C>            <C>        <C>        <C>            <C>
FCC Licenses..........  $261,323     $ (8,918)    $252,405   $261,523     $(16,891)    $244,632   $261,623     $(18,937)    $242,686
Customer lists........    64,430      (21,477)      42,953     64,430      (42,953)      21,477     64,430      (48,323)      16,107
                        --------     --------     --------   --------     --------     --------   --------     --------     --------
                        $325,753     $(30,395)    $295,358   $325,953     $(59,844)    $266,109   $326,053     $(67,260)    $258,793
                        ========     ========     ========   ========     ========     ========   ========     ========     ========
</TABLE>

     MobileMedia is not amortizing the cost of two nationwide Personal
Communications Services ("PCS") licenses, one acquired directly from the FCC and
the other as a result of the MobileComm acquisition, because the construction of
paging networks related to such licenses has not been completed. These networks
are expected to begin commercial operation in 1999 and, accordingly,
amortization of these licenses will begin at such time.

                                      F-68
<PAGE>   217
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

6.  DEBT

     Debt is summarized as follows:

<TABLE>
<CAPTION>
                                                           DECEMBER 31,
                                                       ---------------------    MARCH 31,
                                                          1997        1998        1999
                                                       ----------   --------   -----------
                                                                               (UNAUDITED)
<S>                                                    <C>          <C>        <C>
DIP credit facility..................................  $   10,000   $     --    $  5,000
Revolving loan.......................................      99,000     72,900      72,900
Term loan............................................     550,000    406,100     406,100
10 1/2% Senior Subordinated Deferred Coupon Notes due
  December 1, 2003...................................     174,125    174,125     174,125
9 3/8% Senior Subordinated Notes due November 1,
  2007...............................................     250,000    250,000     250,000
Dial Page Notes......................................       1,570      1,570       1,570
Note Payable.........................................         986        986         986
                                                       ----------   --------    --------
     Total debt......................................  $1,085,681   $905,681    $910,681
                                                       ==========   ========    ========
</TABLE>

     The debt obligations of MobileMedia include:

          1) A debtor-in-possession credit facility ("DIP Facility") with a
     syndicate of lenders including The Chase Manhattan Bank, as Agent (the "DIP
     Lenders"). As of March 31, 1999 there was $5,000 of borrowings outstanding
     under this facility, as of December 31, 1998 there were no funded
     borrowings and as of December 31, 1997, there was $10,000 of borrowings
     outstanding under this facility. MobileMedia is subject to certain
     financial and operating restrictions customary to credit facilities of this
     type including a limitation on periodic capital expenditures, minimum
     allowable periodic EBITDA and retention of a turnaround professional.
     Additionally, MobileMedia is required to make monthly interest payments to
     the DIP Lenders and pay a commitment fee of 0.5% on any unused portion of
     the DIP Facility. The DIP Facility bears interest at a rate of LIBOR plus
     250 basis points or Base Rate plus 150 basis points, at the option of
     MobileMedia. During 1997, the Debtors drew down $47,000 of borrowings and
     repaid $37,000 under the DIP Facility. During January and February, 1998
     the Debtors repaid an additional $10,000. On January 27, 1998, the DIP
     Facility was amended and reduced from $200,000 to $100,000. On August 12,
     1998, MobileMedia received approval from the Bankruptcy Court to extend the
     DIP Facility to March 31, 1999 and further reduce it from $100,000 to
     $75,000. MobileMedia has negotiated an extension of the DIP Facility
     through and including December 31, 1999.

          2) A $750,000 senior secured and guaranteed credit agreement (the
     "Pre-Petition Credit Agreement") with a syndicate of lenders including The
     Chase Manhattan Bank, as Agent. As of March 31, 1999 and December 31, 1998
     there was $479,000 outstanding under this facility consisting of term loans
     of $101,500 and $304,600 and loans under a revolving credit facility
     totaling $72,900. This agreement was entered into on December 4, 1995, in
     connection with the financing of the MobileComm Acquisition. Commencing in
     1996 MobileMedia was in default under this agreement. As a result of such
     default and the bankruptcy filing, MobileMedia has no borrowing capacity
     under this agreement. Since the Petition date, MobileMedia has brought
     current its interest payments and has been making monthly payments to the
     lenders under the Pre-Petition Credit Agreement equal to the amount of
     interest accruing under such agreement. On September 3, 1998, MobileMedia
     repaid $170,000 of borrowings under the Pre-Petition Credit Agreement with
     proceeds from the Tower Sale (see Note 3).

                                      F-69
<PAGE>   218
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

          3) $250,000 Senior Subordinated Notes due November 1, 2007 (the
     "9 3/8% Notes") issued in November 1995. These notes bear interest at a
     rate of 9 3/8% payable semi-annually on May 1 and November 1 of each year.
     On November 1, 1996, MobileMedia did not make its scheduled interest
     payment on its 9 3/8% Notes which constituted an event of default. The note
     holders have not exercised any rights or remedies afforded holders (which
     rights include, but are not limited to, acceleration of the liquidation
     maturity of the notes). Since the Petition date, any such right or remedy
     is subject to the automatic stay created by the Bankruptcy Code.

          4) $210,000 of Senior Subordinated Deferred Coupon Notes (the
     "Deferred Coupon Notes") issued, at a discount, in November 1993. The
     Deferred Coupon Notes accrete at a rate of 10 1/2%, compounded
     semi-annually, to an aggregate principal amount of $210,000 by December 1,
     1998 after which interest is paid in cash at a rate of 10 1/2% and is
     payable semi-annually. By virtue of the missed interest payments on the
     9 3/8% Notes and the Pre-Petition Credit Agreement an event of default has
     occurred. The note holders have not exercised any rights or remedies
     afforded such holders (which rights include, but are not limited to,
     acceleration of the stated maturity of the notes). Since the Petition date,
     any such right or remedy is subject to the automatic stay created by the
     Bankruptcy Code.

  Interest Expense on Debt

     Interest paid during the years ended December 31, 1996, 1997 and 1998, and
the three months ended March 31, 1998 and 1999 (unaudited) was $65,978, $70,817,
$51,560, $13,915 and $9,383 respectively. Total interest cost incurred for the
years ended December 31, 1996, 1997 and 1998 was $94,231, $68,409 and $53,982,
respectively of which $1,292, $176 and $228 was capitalized. Total interest cost
incurred for the three months ended March 31, 1998 and 1999 (unaudited), was
$14,793 and $10,248, respectively, of which $21 and $149 was capitalized.

     Subsequent to the Petition date, interest was accrued and paid only on the
Pre-Petition Credit Agreement and the DIP Facility. If not for the filing,
interest expense for the year ended December 31, 1997 and 1998 and March 31,
1998 and 1999 (unaudited), would have been approximately $104,152, $97,776,
$25,724 and $21,187, respectively.

7.  INCOME TAXES

     The components of income tax benefit (expense) are as follows:

<TABLE>
<CAPTION>
                                               YEAR ENDED DECEMBER 31,
                                            ------------------------------
                                             1996        1997       1998
                                            -------    --------    -------
<S>                                         <C>        <C>         <C>
Current:
     Federal..............................  $    --    $     --    $(1,757)
     State and local......................       --          --     (2,201)
                                            -------    --------    -------
                                                 --          --     (3,958)
  Deferred:
     Federal..............................   52,081          --         --
     State and local......................   17,361          --         --
                                            -------    --------    -------
          Total...........................  $69,442    $     --    $(3,958)
                                            =======    ========    =======
</TABLE>

                                      F-70
<PAGE>   219
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

     MobileMedia is included in the Parent's consolidated federal income tax
return. Income taxes are presented in the accompanying financial statements as
if MobileMedia filed tax returns as a separate consolidated entity.

     A reconciliation of income tax benefit (expense) and the amount computed by
applying the statutory federal income tax rate to loss before income taxes is as
follows:

<TABLE>
<CAPTION>
                                               YEAR ENDED DECEMBER 31,
                                           -------------------------------
                                             1996        1997       1998
                                           ---------   --------   --------
<S>                                        <C>         <C>        <C>
Tax benefit (expense) at federal
  statutory rate.........................  $ 395,285   $ 43,604   $(13,838)
Goodwill and intangible amortization and
  writedown..............................    (95,362)        --         --
State income taxes.......................         --         --     (1,783)
Nondeductible expenses...................         --         --     (4,765)
Valuation allowance on federal deferred
  tax assets.............................   (230,481)   (43,604)    16,428
                                           ---------   --------   --------
          Total..........................  $  69,442   $     --   $ (3,958)
                                           =========   ========   ========
</TABLE>

     Deferred income taxes reflect the net tax effects of temporary differences
between the carrying amounts of assets and liabilities for financial reporting
purposes and the amounts used for federal and state income tax purposes. The
components of deferred tax liabilities are as follows:

<TABLE>
<CAPTION>
                                                                  DECEMBER 31,
                                                              ---------------------
                                                                1997        1998
                                                              ---------   ---------
<S>                                                           <C>         <C>
Deferred tax liabilities:
     Difference in book and tax basis of fixed assets.......  $  10,206   $  19,974
     Other..................................................         68          27
                                                              ---------   ---------
          Deferred tax liabilities..........................     10,274      20,001
Deferred tax assets:
     Tax credit carryforwards...............................         --       1,757
     Accounts receivable reserves...........................     10,578       6,000
     Differences between the book and tax basis of
       intangible assets....................................    128,462     121,526
     Difference between book and tax basis of accrued
       liabilities..........................................      5,089       4,794
     Net operating loss carryforward........................    161,840     135,458
     Deferred gain on tower sale............................         --      27,378
                                                              ---------   ---------
          Total deferred assets.............................    305,969     296,913
          Valuation allowances for deferred tax assets......   (298,350)   (279,567)
                                                              ---------   ---------
          Deferred tax assets...............................      7,619      17,346
                                                              =========   =========
          Net deferred tax liabilities......................  $   2,655   $   2,655
                                                              =========   =========
</TABLE>

     As of December 31, 1998, MobileMedia has available net operating loss
carryforwards for tax purposes of approximately $330,000 which expire in years
2008 through 2012. Utilization of these losses may be limited under Section 382
of the Internal Revenue Code.

     MobileMedia believes consummation of the public offering of 15,525,000
shares of Parent's Class A Common Stock on November 7, 1995 caused an ownership
change for MobileMedia for purposes of

                                      F-71
<PAGE>   220
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

Section 382 of the Code. As a result, the use of MobileMedia's pre-ownership
change net operating loss carryforwards will be limited annually by the Section
382 Limitation, which is estimated to be approximately $40,000. In addition, if
a second ownership change has occurred subsequent to November 7, 1995, which has
not yet been determined, use of MobileMedia's net operating losses would be
severely limited. It is also anticipated that the net operating loss
carryforwards and certain other tax attributes of MobileMedia will be
substantially reduced and their utilization significantly limited as a result of
consummation of the Plan.

8.  LEASES

     Certain facilities and equipment used in operations are held under
operating leases. Rental expenses under operating leases were $44,574, $43,453,
$40,936, $10,423 and $12,989 for the years ended December 31, 1996, 1997 and
1998 and the three months ended March 31, 1998 and 1999 (unaudited),
respectively. At December 31, 1998, the aggregate minimum rental commitments
under leases were as follows:

<TABLE>
<S>                                                           <C>
1999........................................................  $ 48,951
2000........................................................    25,457
2001........................................................    19,250
2002........................................................    15,726
2003........................................................    13,327
Thereafter..................................................    15,783
                                                              --------
                                                              $138,494
                                                              ========
</TABLE>

9.  EMPLOYEE BENEFIT PLANS

     MobileMedia has adopted a retirement savings plan that allows all employees
who have been employed for one year and have at least 1,000 hours of credited
service to contribute and defer up to 15% of their compensation. Effective
February 1, 1996, MobileMedia began a matching contribution of 50% of the first
2% of the elected deferral plus an additional 25% of the next 4% of the elected
deferral. MobileMedia's matching contribution was $700 in 1996, $730 in 1997 and
$692 in 1998 and $160 and $178 for the three months ended March 31, 1998 and
1999 (unaudited), respectively.

10.  STOCK OPTION PLANS

     MobileMedia has two stock option plans under which approximately 1.3
million options are currently outstanding. Under the proposed Plan of
Reorganization, MobileMedia's equity holders will receive no value for their
ownership interests in the Company, and accordingly, the options are also deemed
to have no value.

11.  COMMITMENTS AND CONTINGENCIES

     MobileMedia is party to a number of lawsuits and other matters arising in
the ordinary course of business.

     As announced on September 27, 1996 and October 21, 1996, MobileMedia
disclosed that misrepresentations and other violations had occurred during the
licensing process for as many as 400 to 500, or approximately 6% to 7%, of its
approximately 8,000 local transmission one-way paging stations. MobileMedia
caused an investigation to be conducted by its outside counsel, and a
comprehensive report regarding these matters was provided to the FCC in the fall
of 1996.

                                      F-72
<PAGE>   221
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

     On January 13, 1997, the FCC issued a Public Notice relating to the status
of certain FCC authorizations held by MobileMedia. Pursuant to the Public
Notice, the FCC announced that it had (i) automatically terminated approximately
185 authorizations for paging facilities that were not constructed by the
expiration date of their construction permits and remained unconstructed, (ii)
dismissed as defective approximately 94 applications for fill-in sites around
existing paging stations because they were predicated upon unconstructed
facilities and (iii) automatically terminated approximately 99 other
authorizations for paging facilities that were constructed after the expiration
date of their construction permits. However, the FCC granted MobileMedia interim
operating authority to operate transmitters in this last category subject to
further action by the FCC.

     On April 8, 1997, the FCC adopted an order commencing an administrative
hearing into the qualification of MobileMedia to remain a licensee. The order
directed an Administrative Law Judge to take evidence and develop a full factual
record on directed issues concerning MobileMedia's filing of false forms and
applications. MobileMedia was permitted to operate its licensed facilities and
provide service to the public during the pendency of the hearing.

     On June 6, 1997, the FCC issued an order staying the hearing proceeding in
order to allow MobileMedia to develop and consummate a plan of reorganization
that provides for a change of control of MobileMedia and a permissible transfer
of MobileMedia's FCC licenses. The grant of the stay was premised on the
availability of an FCC doctrine known as Second Thursday, which provides that,
if there is a change of control that meets certain conditions, the regulatory
issues designated for administrative hearing will be resolved by the transfer of
MobileMedia's FCC licenses to the new owners of MobileMedia and the hearing will
not proceed. The stay was originally granted for ten months and was extended by
the FCC through October 6, 1998.

     On September 2, 1998, MobileMedia and Arch Communications Group, Inc.
("Arch") filed a joint Second Thursday application. The FCC released an order
granting the application on February 5, 1999. The order, which is conditioned on
confirmation of the plan and consummation thereof within nine months, expressly
terminated the administrative hearing and resolved the issues designated
therein. The order denied the parties' request for permanent authority to
operate transmitters for which MobileMedia was granted interim authority on
January 13, 1997. If the Merger is consummated, Arch must cease operating these
facilities within 6 months after the merger. The order also denied the parties'
request for a waiver of the spectrum cap (which prohibits narrowband PCS
licensees from having ownership interest in more than three channels in any
geographic area). Arch must divest any excess channels within 6 months after the
merger.

     Prior to the Petition date, five actions allegedly arising under the
federal securities laws were filed against MobileMedia and certain of its
present and former officers, directors and underwriters in the United States
District Court for the District of New Jersey (the "New Jersey District Court").
These actions were subsequently consolidated as In re MobileMedia Securities
Litigation, No. 96-5723 (AJL) (the "New Jersey Actions"). A consolidated amended
complaint (the "Complaint") was filed on November 21, 1997. The Complaint does
not name MobileMedia as a defendant.

     In June 1997, the Debtors initiated an Adversary Proceeding in the
Bankruptcy Court to stay the prosecution of the New Jersey Actions. Pursuant to
a Stipulation entered into among the Debtors and the plaintiffs in the New
Jersey Actions and "So Ordered" by the Bankruptcy Court on October 31, 1997, the
plaintiffs in the New Jersey Actions could conduct only limited discovery in
connection with the New Jersey Actions and could not file any pleadings, except
responses to motions to dismiss, until the earlier of September 30, 1998 and the
effective date of a plan of reorganization. On October 21, 1998, the defendants'
motion to dismiss the New Jersey Actions filed with the New Jersey District
Court on January 16, 1998 was denied.

                                      F-73
<PAGE>   222
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

     In addition to the New Jersey Actions, two lawsuits (together, the
"California Actions" and, together with the New Jersey Actions, the "Securities
Actions") were filed in September 1997 in the United States District Court for
the Northern District of California and the Superior Court of California naming
as defendants certain former officers and certain present and former directors
of MobileMedia, certain investment entities and the Debtors' independent
auditors. None of the Debtors is named as defendant in the California Actions.

     On November 4, 1997, the Debtors commenced an adversary proceeding in the
Bankruptcy Court seeking to stay the prosecution of the California Actions
against the named defendants. At hearings held on December 10, 1997 and May 29,
1998, the Bankruptcy Court enjoined the plaintiffs in the California Actions
until September 15, 1998 from taking certain actions in connection with the
California Actions, with certain exceptions.

     The plaintiffs in both the New Jersey Actions and California Actions are
currently conducting discovery of MobileMedia in connection with their
prosecution of the actions against the named defendants. Following consummation
of the Plan of Reorganization, the Company may be subject to further discovery
in these proceedings.

     Neither the New Jersey Actions nor the California Actions name any of the
Debtors as a defendant. However, proofs of claim have been filed against the
Debtors by the plaintiffs in the New Jersey Actions, and both the New Jersey
Actions and the California Actions may give rise to claims against the Debtors'
Directors, Officers and Corporate Liability Insurance Policy. It is anticipated
that under any plan of reorganization for MobileMedia these Claims will receive
no distributions.

12.  OTHER INVESTMENTS

     On March 21, 1995, MobileMedia purchased a 33% interest in Abacus
Communications Partners, L.P., ("Abacus") a Delaware limited partnership, from
Abacus Business Services, Inc. for $1,641. Abacus Communications Partners, L.P.
is one of MobileMedia's alphanumeric dispatch services providers. The investment
has been accounted for under the equity method in accordance with Accounting
Principles Board Opinion No. 18. Under the equity method, original investments
are recorded at cost and adjusted by MobileMedia's share of undistributed
earnings or losses of the purchased company. MobileMedia's share of income
(loss) of affiliate, net of distribution, for the years ended December 31, 1996,
1997 and 1998, was $160, $69, and $(87), respectively. On December 30, 1998
MobileMedia reached an agreement to sell its interest in Abacus to Abacus
Exchange Inc. for $1,400 and subsequently completed the sale on January 25,
1999. Accordingly, MobileMedia wrote down its investment in Abacus from $1,612
to $1,400 as of December 31, 1998.

13.  IMPACT OF YEAR 2000 (UNAUDITED)

GENERAL

     Computer systems were originally designed to recognize calendar years by
the last two digits in the date code field. Beginning in the year 2000, these
date code fields will need to accept four digit entries to distinguish
twenty-first century dates from twentieth century dates. Any of MobileMedia's
computer programs that have time-sensitive software may recognize a date using
"00" as the year 1900 rather than the year 2000. This could result in a system
failure or miscalculations causing disruptions of operations, including, among
other things, a temporary inability to process transactions, send invoices, or
engage in similar normal business activities. As a result, in less than two
years, the computerized systems (including both information and non-information
technology systems) and applications used by MobileMedia will

                                      F-74
<PAGE>   223
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

need to be reviewed, evaluated and, if and where necessary, modified or replaced
to ensure that all financial, information and operating systems are Year 2000
compliant.

  State of Readiness

     MobileMedia has formed an internal task force comprised of representatives
of its various relevant departments to address Year 2000 compliance matters. The
task force has undertaken a preliminary review of internal and external areas
that are likely to be affected by Year 2000 compliance matters and has
classified the various areas as mission critical, important or
non-critical/non-important. MobileMedia also expects to hire outside consultants
to review MobileMedia's testing methodology and test results, to assess its
contingency planning and to provide general oversight relating to Year 2000
compliance matters.

     With respect to internal matters, MobileMedia has completed a review of its
hardware and software to determine whether its business-related applications
(including applications relating to distribution, finance, inventories,
operations, pager activation, purchasing and sales/marketing) will be Year 2000
compliant. In addition, in the last quarter of 1998, programs designed to
identify Year 2000 problems associated with dates embedded in certain
business-related files were created and executed to identify any Year 2000
compliance issues. The testing unearthed a few Year 2000 problems all of which
have been addressed and retested for Year 2000 readiness. Additional testing
took place the first quarter of 1999, which included testing of MobileMedia's
financial and human resource software packages. Although the results of these
tests are still being analyzed, relatively few Year 2000 problems were
identified. There can be no assurance, however, that such testing has detected,
or will detect, all compliance issues related to the Year 2000 problem.

     With respect to external matters, MobileMedia has distributed
questionnaires and requests for certification to its mission-critical vendors
and is in the process of obtaining and reviewing the responses thereto. The
questionnaires have requested information concerning embedded technologies of
such vendors, the hardware and software applications used by such vendors and
the Year 2000 compliance efforts of such vendors relating thereto.

  Estimated Year 2000 Compliance Costs

     MobileMedia has an information technology staff of approximately 68 people
that has addressed technical issues relating to Year 2000 compliance matters.
Through December 31, 1998, MobileMedia has incurred approximately $50 in costs
(excluding in-house labor and hardware) in connection with Year 2000 compliance
matters. In addition, MobileMedia has purchased upgraded hardware at a cost of
approximately $175 for use as redundant equipment in testing for Year 2000
problems in an isolated production environment. MobileMedia estimates that it
will expend approximately $500 on additional hardware, software and other items
related to the Year 2000 compliance matters.

     In addition, MobileMedia estimates that it will incur approximately $200 in
costs relating to Year 2000 remediation efforts for its paging network hardware.
MobileMedia also upgraded its paging network hardware during 1998 and plans
further upgrades in fiscal year 1999. Such upgrades have not been and are not
expected to be purchased solely for remediation of the Year 2000 compliance
problems; such upgrades are not themselves expected to have Year 2000 compliance
problems.

  Risks Relating to Year 2000 Compliance Matters

     MobileMedia has a goal to become Year 2000 compliant with respect to
internal matters during 1999. Although MobileMedia has begun testing of its
internal business-related hardware and software applications, there can be no
assurances that such testing will detect all applications that may be affected

                                      F-75
<PAGE>   224
               MOBILEMEDIA COMMUNICATIONS, INC. AND SUBSIDIARIES

           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                             (DOLLARS IN THOUSANDS)

by Year 2000 compliance problems. With respect to external matters, due to the
multi-dependent and interdependent issues raised by Year 2000 compliance,
including many factors beyond its control, MobileMedia may face the possibility
that one or more of its mission-critical vendors, such as its utilities,
telephone carriers, equipment manufacturers or satellite carriers, may not be
Year 2000 compliant on a timely basis. Because of the unique nature of such
vendors, alternate providers may not be available. Finally, MobileMedia does not
manufacture any of the pagers, paging-related hardware or network equipment used
by MobileMedia or its customers in connection with MobileMedia's paging
operations. Although MobileMedia has tested such equipment, it has also relied
upon the representations of its vendors with respect to their Year 2000
readiness. MobileMedia can give no assurance as to the accuracy of such vendors'
representations.

  Contingency Planning

     MobileMedia has begun the process of assessing contingency plans that might
be available in the event of either internal or external Year 2000 compliance
problems. To this end, MobileMedia's various internal departments have begun to
prepare assessments of potential contingency alternatives. The task force will
undertake a review of these assessments on a department-by-department basis and
on a company-wide basis. MobileMedia intends to complete its contingency
planning during the second quarter of 1999.

                                      F-76
<PAGE>   225

                                                                         ANNEX A
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                          AGREEMENT AND PLAN OF MERGER
                                     AMONG
                             PAGING NETWORK, INC.,
                        ARCH COMMUNICATIONS GROUP, INC.
                                      AND
                          ST. LOUIS ACQUISITION CORP.

                          DATED AS OF NOVEMBER 7, 1999
                               AND AMENDED AS OF
                                JANUARY 7, 2000
                                  MAY 10, 2000
                                      AND
                                 JULY 24, 2000

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
<PAGE>   226

                          AGREEMENT AND PLAN OF MERGER

     This AGREEMENT AND PLAN OF MERGER ("Agreement"), dated as of November 7,
1999, as amended by the Amendments dated January 7, 2000, May 10, 2000 and July
24, 2000, among Paging Network, Inc., a Delaware corporation ("PageNet"), Arch
Communications Group, Inc., a Delaware corporation ("Arch"), and St. Louis
Acquisition Corp., a Delaware corporation that is a wholly owned subsidiary of
Arch ("Merger Sub").

                                    RECITALS

     WHEREAS, the respective Boards of Directors of each of Arch, Merger Sub and
PageNet have approved, recommended and declared advisable this Agreement and the
merger of Merger Sub with and into PageNet (the "Merger") upon the terms and
subject to the conditions set forth in this Agreement;

     WHEREAS, the parties hereto intend, by executing and delivering this
Agreement, to adopt a plan of reorganization within the meaning of Section
368(a) of the Internal Revenue Code of 1986, as amended (the "Code"), and to
cause the Merger and the other transactions which are part of this plan of
reorganization to qualify as a "reorganization" as therein defined;

     WHEREAS, the Arch Board of Directors has approved, recommended and declared
advisable certain amendments to its Certificate of Incorporation to effectuate
the actions described herein (the "Certificate Amendments"), contemporaneously
upon and in connection with the Merger;

     WHEREAS, Arch, Merger Sub and PageNet desire to make certain
representations, warranties, covenants and agreements in connection with this
Agreement.

     NOW, THEREFORE, in consideration of the premises, and of the
representations, warranties, covenants and agreements contained in this
Agreement, the parties hereto agree as follows:

                                   ARTICLE I.

                      THE MERGER; CLOSING; EFFECTIVE TIME

     1.1.  The Merger.  Upon the terms and subject to the conditions set forth
in this Agreement, at the Effective Time (as defined in Section 1.3), Merger Sub
shall be merged with and into PageNet and the separate corporate existence of
Merger Sub shall thereupon cease. PageNet shall be the surviving corporation in
the Merger (sometimes referred to as the "Surviving Corporation") and shall
continue to be governed by the laws of the State of Delaware, and the separate
corporate existence of PageNet with all its rights, privileges, immunities,
powers and franchises shall continue unaffected by the Merger, except as set
forth in Articles II and III of this Agreement. The Merger shall have the
effects specified in the Delaware General Corporation Law, as amended (the
"DGCL").

     1.2.  Closing.  The closing of the Merger (the "Closing") shall take place:
(i) at the offices of Hale and Dorr LLP, 60 State Street, Boston, Massachusetts,
at 9:00 A.M., local time, on the second business day after the date on which the
last to be fulfilled or waived of the conditions set forth in Article VII (other
than those conditions that by their nature are to be satisfied at the Closing,
but subject to the fulfillment or waiver of those conditions) shall be satisfied
or waived in accordance with this Agreement; or (ii) at such other place and
time and/or on such other date as Arch and PageNet may agree in writing (the
"Closing Date").

     1.3.  Effective Time.  At the Closing, Arch and PageNet will cause a
Certificate of Merger (the "Certificate of Merger") to be executed,
acknowledged, and filed with the Secretary of State of the State of Delaware as
provided in Section 251 of the DGCL. The Merger shall become effective at the
time when the Certificate of Merger has been duly filed with the Secretary of
State of the State of Delaware or such other later time as shall be agreed upon
by the parties and set forth in the Certificate of Merger in accordance with the
DGCL (the "Effective Time").

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                                  ARTICLE II.

      CERTIFICATE OF INCORPORATION AND BYLAWS OF THE SURVIVING CORPORATION

     2.1.  The Certificate of Incorporation.  The certificate of incorporation
of PageNet, amended and restated in its entirety as set forth in Exhibit A,
shall be the certificate of incorporation of the Surviving Corporation (the
"Charter"), until duly amended as provided therein or by applicable law.

     2.2.  The Bylaws.  The bylaws of Merger Sub, as in effect immediately prior
to the Effective Time, shall be the bylaws of the Surviving Corporation (the
"Bylaws"), until thereafter amended as provided therein or by applicable law.

                                  ARTICLE III.

                              DIRECTORS & OFFICERS

     3.1.  Directors of Arch.  Arch shall take all actions necessary (subject to
applicable law and any necessary stockholder approval) to cause, at the
Effective Time, the number of directors comprising the full Board of Directors
of Arch to be comprised of twelve directors, six of which shall be nominated by
the Board of Directors of Arch, and six of which shall be nominated by the Board
of Directors of PageNet, each such person to serve from the Effective Time until
his or her successor has been duly elected and qualified, or until his or her
earlier death, resignation, or removal in accordance with the Charter and the
Bylaws; provided, however, that of the six directors nominated by the Board of
Directors of PageNet, one shall be designated by each of the three holders of
PageNet Notes holding the greatest percentage in aggregate principal amount of
the PageNet Notes; and if and to the extent that any such holder declines to
make such designation, the number of directors nominated by the Board of
Directors of PageNet shall be decreased and the number of directors nominated by
the Board of Directors of Arch shall be increased. The directors nominated by
PageNet shall be divided as nearly evenly as is possible among the classes of
directors of Arch.

     3.2.  Directors of the Surviving Corporation.  The directors of Merger Sub
at the Effective Time shall, from and after the Effective Time, be the directors
of the Surviving Corporation until his or her successor has been duly elected
and qualified, or until his or her earlier death, resignation, or removal in
accordance with the Charter and the Bylaws;

     3.3.  Officers of the Surviving Corporation.  The officers of PageNet at
the Effective Time shall at the Effective Time, be the officers of the Surviving
Corporation until his or her successor has been duly elected and qualified, or
until their earlier death, resignation, or removal in accordance with the
Charter and the Bylaws.

                                  ARTICLE IV.

        EFFECT OF THE MERGER ON CAPITAL STOCK; EXCHANGE OF CERTIFICATES

     4.1.  Effect on Capital Stock.  At the Effective Time, the Merger shall
have the following effects on the capital stock of Arch, Merger Sub and PageNet,
without any action on the part of the holder of any capital stock of Arch,
Merger Sub or PageNet:

          (a) Merger Consideration.  Each share of common stock, par value $0.01
     per share, of PageNet (each, a "PageNet Share") issued and outstanding
     immediately prior to the Effective Time (excluding PageNet Shares
     (collectively, "Excluded PageNet Shares") that are owned by Arch, Merger
     Sub or any direct or indirect, wholly owned subsidiary of Arch or Merger
     Sub (collectively, the "Arch Companies")), shall be converted into and
     become exchangeable for 0.08365112 of a share (the "Exchange Ratio") of
     common stock, par value $0.01 per share, of Arch (the "Arch Common Stock"),
     subject to adjustment as provided in Section 4.4 (the "Merger
     Consideration"). At the Effective Time, all PageNet Shares shall no longer
     be outstanding, shall be canceled and retired and shall cease to exist, and
     each certificate (a "Certificate") formerly representing any of such
     PageNet
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     Shares (other than Excluded PageNet Shares) shall thereafter represent only
     the right to receive the Merger Consideration and the right, if any, to
     receive a distribution or dividend pursuant to Section 4.2(b)(i), in each
     case without interest, or to vote pursuant to Section 4.2(b)(ii).

          (b) Cancellation of Excluded PageNet Shares.  At the Effective Time,
     each Excluded PageNet Share shall no longer be outstanding, shall be
     canceled and retired without payment of any consideration therefor, and
     shall cease to exist.

          (c) Merger Sub Capital Stock.  At the Effective Time, each share of
     Common Stock, par value $0.01 per share, of Merger Sub issued and
     outstanding immediately prior to the Effective Time shall be converted into
     one share of common stock of the Surviving Corporation, and the Surviving
     Corporation shall thereby become a wholly owned subsidiary of Arch.

     4.2.  Exchange of Certificates for Shares.

          (a) Exchange Procedures.  Promptly after the Effective Time, Arch
     shall cause its transfer agent or another exchange agent selected by Arch
     with PageNet's prior approval (the "Exchange Agent"), which shall not be
     unreasonably withheld, to mail to each holder of record as of the Effective
     Time of a Certificate: (i) a letter of transmittal specifying that delivery
     of the Certificates shall be effected, and that risk of loss and title to
     the Certificates shall pass, only upon delivery of the Certificates (or
     affidavits of loss in lieu thereof) to the Exchange Agent in accordance
     with the terms and conditions of such letter of transmittal, such letter of
     transmittal to be in such form and have such other provisions as Arch and
     PageNet may reasonably agree; and (ii) instructions for exchanging the
     Certificates for: (A) certificates representing shares of Arch Common
     Stock; (B) with respect to holders of PageNet Shares at the Vast
     Distribution Record Date (as defined in Section 6.22), the Distributed
     Interests (as defined in Section 6.22), and (C) any unpaid dividends and
     other distributions due to such holder with respect to such shares. Subject
     to Sections 4.2(g) and 4.3, upon proper surrender of a Certificate for
     cancellation (or affidavits of loss in lieu thereof) to the Exchange Agent
     together with such letter of transmittal, duly executed, the holder of such
     Certificate shall be entitled to receive in exchange therefor: (x) a
     certificate representing that number of shares of Arch Common Stock that
     such holder is entitled to receive pursuant to this Article IV and, with
     respect to PageNet Shares at the Vast Distribution Record Date,
     certificates representing the Distributed Interests that such holder is
     entitled pursuant to Section 6.22; and (y) a check in the amount (after
     giving effect to any required tax withholdings) of any dividends or other
     distributions that such holder has the right to receive pursuant to the
     provisions of this Article IV. The Certificate so surrendered shall
     forthwith be canceled. No interest will be paid or accrued on any amount
     payable upon due surrender of any Certificate. Notwithstanding the
     foregoing, a holder of Dissenting Shares shall not be required to surrender
     a Certificate in order to receive Distributed Interests with respect to the
     PageNet Shares represented by such Certificate, provided that Arch has
     confirmed to the Exchange Agent that such holder has taken all necessary
     steps to perfect appraisal rights pursuant to Section 4.3 hereof and the
     DGCL. In the event of a transfer of ownership of PageNet Shares that is not
     registered in the transfer records of PageNet, a certificate representing
     the proper number of shares of Arch Common Stock and, with respect to
     PageNet Shares at the Vast Distribution Record Date, certificates
     representing the Distributed Interests, together with a check for any
     dividends or distributions with respect thereto, may be issued and/or paid
     to such a transferee if the Certificate formerly representing such PageNet
     Shares is presented to the Exchange Agent, accompanied by all documents
     required to evidence and effect such transfer and to evidence that all
     applicable stock transfer taxes have been paid. If any certificate for
     shares of Arch Common Stock (and/or Distributed Interests) is to be issued
     in a name other than that in which the Certificate surrendered in exchange
     therefor is registered, it shall be a condition of such exchange that the
     Person (as defined below) requesting such exchange shall pay all transfer
     and other taxes required by reason of the issuance of certificates for
     shares of Arch Common Stock and/or Distributed Interests in a name other
     than that of the registered holder of the Certificate surrendered, or shall
     establish to the satisfaction of Arch or the Exchange Agent that such tax
     has been paid or is not applicable.

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          The term "Person" means any individual, corporation (including
     not-for-profit), general or limited partnership, limited liability company,
     joint venture, estate, trust, association, organization, Governmental
     Entity (as defined in Section 5.1(d)(i)), or other entity of any kind or
     nature.

          (b) Distributions with Respect to Unexchanged Shares; Voting.

             (i) Whenever a dividend or other distribution is declared by Arch
        with respect to Arch Common Stock, the record date for which is at or
        after the Effective Time, that declaration shall include dividends or
        other distributions with respect to all shares of Arch Common Stock
        issuable pursuant to this Agreement. No dividends or other distributions
        with respect to such Arch Common Stock shall be paid to any holder of
        any unsurrendered Certificate until such Certificate is surrendered for
        exchange in accordance with this Article IV. Subject to the effect of
        applicable Laws, following surrender of any such Certificate, there
        shall be issued or paid to the holder of the certificates representing
        shares of Arch Common Stock issued in exchange therefor, without
        interest: (A) at the time of such surrender, the dividends or other
        distributions with a record date after the Effective Time and a payment
        date on or prior to the date of issuance of such shares of Arch Common
        Stock and not previously paid; and (B) at the appropriate payment date,
        the dividends or other distributions payable with respect to such shares
        of Arch Common Stock with a record date after the Effective Time and
        prior to the date of issuance of such shares of Arch Common Stock but
        with a payment date subsequent to surrender. For purposes of dividends
        or other distributions with respect to shares of Arch Common Stock, all
        such shares to be issued pursuant to the Merger shall be deemed issued
        and outstanding as of the Effective Time.

             (ii) At any meeting of stockholders of Arch with a record date at
        or after the Effective Time, registered holders of unsurrendered
        Certificates shall be entitled to vote the number of shares of Arch
        Common Stock represented by such Certificates, regardless of whether
        such holders have exchanged their Certificates; provided, however, that
        any such vote shall be at the times, upon the conditions, and in the
        manner prescribed by the certificate of incorporation and bylaws of
        Arch.

          (c) Transfers.  From and after the Effective Time, there shall be no
     transfers of PageNet Shares or, if Arch elects to convert shares of Arch
     Class B Common Stock (as defined below) into shares of Arch Common Stock at
     the Effective Time, Arch Class B Common Stock that were outstanding
     immediately prior to the Effective Time recorded on the stock transfer
     books of PageNet or Arch, as the case may be.

          (d) Fractional Shares.  Notwithstanding any other provision of this
     Agreement to the contrary, no certificates or scrip representing fractional
     shares of Arch Common Stock will be issued in the Merger, but in lieu
     thereof, each holder of Certificates otherwise entitled to a fractional
     share of Arch Common Stock will be entitled to receive, from the Exchange
     Agent in accordance with the provisions of this Section 4.2(d), a cash
     payment in lieu of such fractional shares of Arch Common Stock determined
     by multiplying such fraction (rounded to the nearest one-hundredth of a
     share) by the average closing price of a share of Arch Common Stock, as
     reported in The Wall Street Journal, New York City edition, on the ten (10)
     days immediately prior to the Effective Time. As soon as practicable after
     the determination of the amount of cash, if any, to be paid to the holders
     of Certificates in lieu of any fractional shares of Arch Common Stock, the
     Exchange Agent shall make available such amounts of cash to such holders of
     Certificates, without interest thereon.

          (e) Termination of Exchange Period; Unclaimed Stock.  Any shares of
     Arch Common Stock, and any portion of the dividends or other distributions
     with respect to the Arch Common Stock deposited by Arch with the Exchange
     Agent (including the proceeds of any investments thereof) that remain
     unclaimed by the holders of Certificates 180 days after the Effective Time
     shall be re-delivered to Arch. Any holders of Certificates who have not
     theretofore complied with this Article IV shall thereafter be entitled to
     look only to the Surviving Corporation for exchange of shares of Arch
     Common Stock, and any dividends and other distributions with respect
     thereto issuable and/or

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<PAGE>   230

     payable pursuant to Section 4.1, Section 4.2(b), and Section 4.2(d) upon
     due surrender of their Certificates (or affidavits of loss in lieu
     thereof), in each case, without any interest thereon. Any Distributed
     Interests, and any portion of the dividends or other distributions with
     respect to the Distributed Interests deposited by PageNet with the Exchange
     Agent (including the proceeds of any investments thereof) that remain
     unclaimed by the holders of Certificates 180 days after the Effective Time
     shall be re-delivered to the Distributed Subsidiary. Any holders of
     Certificates who have not theretofore complied with this Article IV shall
     thereafter be entitled to look only to the Distributed Subsidiary for the
     Distributed Interests, and any dividends and other distributions with
     respect thereto issuable and/or payable pursuant to Section 4.1, Section
     4.2(b), and Section 6.22 upon due surrender of their Certificates (or
     affidavits of loss in lieu thereof), in each case, without any interest
     thereon. Notwithstanding the foregoing, none of Arch, the Distributed
     Subsidiary, the Exchange Agent, nor any other Person shall be liable to any
     former holder of Certificates for any amount properly delivered to a public
     official pursuant to applicable abandoned property, escheat or similar
     laws.

          (f) Lost, Stolen or Destroyed Certificates.  In the event any
     Certificate shall have been lost, stolen or destroyed, upon the making of
     an affidavit of that fact by the Person claiming such Certificate to be
     lost, stolen or destroyed, and the posting by such Person of a bond in the
     form customarily required by Arch as indemnity against any claim that may
     be made against it with respect to such Certificate, Arch and PageNet will
     issue the shares of Arch Common Stock and the Distributed Interests and the
     Exchange Agent will issue stock and any dividends and other distributions
     with respect thereto issuable or payable in exchange for such lost, stolen,
     or destroyed Certificate pursuant to Section 4.1, Section 4.2(b), Section
     4.2(d), and Section 6.22, in each case, without interest.

          (g) Affiliates.  Notwithstanding anything in this Agreement to the
     contrary, Certificates surrendered for exchange by any Rule 145 Affiliate
     (as determined pursuant to Section 6.8) of PageNet shall not be exchanged
     until Arch has received a written agreement from such Person as provided in
     Section 6.8.

     4.3.  Dissenters' Rights.  Notwithstanding anything to the contrary,
PageNet Shares outstanding immediately prior to the Effective Time and held by a
stockholder of record as of the time of the PageNet Stockholders Meeting who has
not voted in favor of the Merger or consented thereto in writing and who has
delivered a written demand for appraisal of such shares at or before the PageNet
Stockholders Meeting in accordance with Section 262 of the DGCL ("Dissenting
Shares"), shall not be converted into the right to receive the Merger
Consideration unless such holder fails to perfect or withdraws or otherwise
loses his right to appraisal and payment under the DGCL. If, after the Effective
Time, any such holder fails to perfect or effectively withdraws or loses his
right to appraisal and payment, such Dissenting Shares shall thereupon be
treated as if they had been converted as of the Effective Time into the right to
receive the Merger Consideration to which such holder is entitled, without
interest or dividends thereon.

     4.4.  Adjustments to Prevent Dilution.  In the event that prior to the
Effective Time, solely as a result of a distribution, reclassification, stock
split (including a reverse split), stock dividend or stock distribution, or
other similar transaction, there is a change in the number of PageNet Shares,
Arch Common Stock, or securities convertible or exchangeable into, or
exercisable for, PageNet Shares or Arch Common Stock issued and outstanding, the
Exchange Ratio shall be equitably adjusted to eliminate the effects of such
event.

     4.5.  Alternate Transaction Structure.  At any time prior to the
effectiveness of the S-4 Registration Statement (as defined herein), either Arch
or PageNet may notify the other party (the "Alternative Merger Notice") that it
desires to restructure the Merger or the other transactions contemplated hereby
in a manner contemplated to (i) increase the likelihood that the Merger would be
treated as a tax-free reorganization within the meaning of Section 368(a) of the
Code, (ii) decrease any potential tax liability of PageNet, Arch or the
Surviving Corporation after the Effective Time, (iii) provide greater
operational flexibility to Arch and the Surviving Corporation after the
Effective Time, or (iv) increase the number of PageNet Shares (or Distributed
Interests) offered to holders of PageNet Notes or the number of shares of

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Arch Common Stock offered to holders of Arch Notes in the Exchange Offers (with
a corresponding reduction in the number of shares of Arch Common Stock (or
Distributed Interests) offered to the holders of PageNet Shares or the holders
of Arch Common Stock, respectively). Upon delivery of the Alternative Merger
Notice, the parties to this Agreement shall cooperate with each other and use
their respective reasonable best efforts to determine the manner in which the
Merger, the Agreement and the transactions contemplated hereby shall be
restructured (the Merger, restructured as contemplated by the parties pursuant
to this Section 4.5, shall be referred to herein as the "Alternative Merger").
With the written consent of each of the parties to this Agreement (such consent
not to be unreasonably withheld), the Merger, this Agreement and the other
transactions contemplated hereby may be modified to reflect the Alternative
Merger with a view to ensuring that the parties hereto are not adversely
affected by the restructuring.

                                   ARTICLE V.

                         REPRESENTATIONS AND WARRANTIES

     5.1.  Representations and Warranties of PageNet, Arch and Merger Sub.
Except as set forth in the corresponding sections or subsections of the
respective disclosure letters, dated as of the date of this Agreement, and
delivered by PageNet to Arch or by Arch to PageNet (each a "Disclosure Letter,"
and the "Pagenet Disclosure Letter" and the "Arch Disclosure Letter,"
respectively), as the case may be, PageNet (except for subparagraphs (b)(ii),
(c)(ii), (j)(ii) and (o)(ii) below and references in subparagraphs (a) and (e)
below to documents made available by Arch to PageNet) represents and warrants to
Arch and Merger Sub, and Arch, on behalf of itself and Merger Sub (except for
subparagraphs (b)(i), (c)(i), (j)(i), and (o)(i) below, and references in
subparagraphs (a) and (e) below to documents made available by PageNet to Arch)
represents and warrants to PageNet, that:

          (a) Organization, Good Standing and Qualification.  Each of it and its
     Subsidiaries is a corporation duly organized, validly existing, and in good
     standing under the laws of its respective jurisdiction of organization and
     has all requisite corporate or similar power and authority to own and
     operate its properties and assets and to carry on its business as presently
     conducted, and is qualified to do business and is in good standing as a
     foreign corporation in each jurisdiction where the ownership or operation
     of its properties or conduct of its business requires such qualification,
     except when the failure to be so qualified or in good standing, when taken
     together with all other such failures, is not reasonably likely to have a
     Material Adverse Effect (as defined below) on it. It has made available to
     Arch, in the case of PageNet, and to PageNet, in the case of Arch, a
     complete and correct copy of its certificate of incorporation and bylaws,
     each as amended to date. Such certificates of incorporation and bylaws are
     in full force and effect.

     The term "Subsidiary" means, with respect to PageNet or Arch, as the case
may be, any entity, whether incorporated or unincorporated, of which at least a
majority of the securities or other ownership interests having by their terms
ordinary voting power to elect at least a majority of the Board of Directors or
other persons performing similar functions is directly or indirectly owned by
such party.

     The term "Material Adverse Effect" means, with respect to any Person, a
material adverse effect on the business, assets (including licenses, franchises
and other intangible assets), financial condition and results of operations of
such Person and its Subsidiaries, taken as a whole; provided, however, that
Material Adverse Effect shall exclude any effect resulting from, or related to,
changes or developments involving: (1) a prospective change arising out of any
proposed or adopted legislation, or any other proposal or enactment by any
governmental, regulatory, or administrative authority; (2) general conditions
applicable to the U.S. economy, including changes in interest rates; or (3)
conditions affecting the U.S. wireless telecommunications industry, in each case
taken as a whole.

     Reference to "the other party" means, with respect to PageNet, Arch and
means, with respect to Arch, PageNet.

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          (b) Capital Structure.

          (i) The authorized capital stock of PageNet consists of 250,000,000
     PageNet Shares, of which 103,960,240 PageNet Shares were issued and
     outstanding and no PageNet Shares were held in treasury as of the close of
     business on November 5, 1999, and 25,000,000 shares of preferred stock, of
     which no shares were issued and outstanding as of the close of business on
     November 5, 1999. All of the outstanding PageNet Shares have been duly
     authorized and are validly issued, fully paid and nonassessable. There are
     no PageNet Shares reserved for issuance pursuant to the Shareholder Rights
     Agreement, dated as of September 8, 1994, between PageNet and The First
     National Bank of Boston, as Rights Agent, as amended (the "PageNet Rights
     Agreement"), and PageNet Shares subject to issuance as set forth below, as
     of the date of this Agreement, and PageNet has no PageNet Shares or
     preferred stock reserved for, or subject to, issuance. As of November 5,
     1999, there were 9,887,588 PageNet Shares that PageNet was obligated to
     issue pursuant to PageNet's stock plans, at a weighted average exercise
     price of $9.2637 per PageNet Share, and each of such plans is listed in
     Section 5.1(b)(i) of the PageNet Disclosure Letter (collectively, the
     "PageNet Stock Plans"). Each of the outstanding shares of capital stock or
     other securities of each of PageNet's "Significant Subsidiaries" (as
     defined in Rule 1.02(w) of Regulation S-X promulgated pursuant to the
     Securities Exchange Act of 1934, as amended (the "Exchange Act"), including
     any Subsidiaries that, if aggregated, would together constitute a
     Significant Subsidiary) is duly authorized, validly issued, fully paid and
     nonassessable and owned by PageNet or a direct or indirect wholly owned
     subsidiary of PageNet, free and clear of any lien, pledge, security
     interest, claim or other encumbrance. Except as set forth above, as of the
     date of this Agreement there are no preemptive or other outstanding rights,
     options, warrants, conversion rights, stock appreciation rights, redemption
     rights, repurchase rights, agreements, arrangements or commitments to issue
     or to sell any shares of capital stock or other securities of PageNet or
     any of its Significant Subsidiaries or any securities or obligations
     convertible or exchangeable into, or exercisable for, or giving any Person
     a right to subscribe for or acquire, any securities of PageNet or any of
     its Significant Subsidiaries, and no securities or obligation evidencing
     such rights are authorized, issued or outstanding. As of the date hereof,
     PageNet does not have outstanding any bonds, debentures, notes or other
     debt obligations, the holders of which have the right to vote (or
     convertible into or exercisable for securities having the right to vote)
     with the stockholders of PageNet on any matter. No PageNet Shares are held
     by a Subsidiary of PageNet.

          (ii) The authorized capital stock of Arch consists of 65,000,000
     shares of Arch Common Stock, of which 45,837,186 shares of Arch Common
     Stock were issued and outstanding and no shares of Arch Common Stock were
     held in treasury as of the close of business on November 5, 1999,
     10,000,000 shares of Class B common stock, par value $0.01 per share, of
     Arch (the "Arch Class B Common Stock") of which 5,360,261 shares of Arch
     Class B Common Stock were issued and outstanding as of the close of
     business on November 5, 1999, and 10,000,000 shares of preferred stock, of
     which (x) 250,000 were designated Series C Convertible Preferred Stock, par
     value $0.01 per share (each a "Arch Series C Preferred Share"), of which
     250,000 shares were issued and outstanding as of the close of business on
     November 5, 1999, and (y) 300,000 shares of which were designated Series B
     Junior Participating Preferred Stock, par value $0.01 per share (each a
     "Arch Series B Preferred Share," collectively the "Arch Series B Preferred
     Shares"), none of which were outstanding as of the close of business on
     November 5, 1999 (the Arch Series B Preferred Shares together with the Arch
     Series C Preferred Shares, the "Arch Preferred Shares"). All of the
     outstanding shares of Arch Common Stock, Arch Class B Common Stock and Arch
     Preferred Shares have been duly authorized and are validly issued, fully
     paid and nonassessable. Other than 300,000 Arch Series B Preferred Shares
     reserved for issuance pursuant to the Rights Agreement, dated as of October
     13, 1995, between Arch and The Bank of New York, as Rights Agent, as
     amended (the "Arch Rights Agreement"), and Arch Common Stock subject to
     issuance as set forth below, and Arch Preferred Shares, Arch has not
     authorized, issued, or reserved for issuance any common stock, preferred
     stock, or other shares of capital stock as of the date of this Agreement.
     As of November 5, 1999, there were 1,834,253 shares of Arch Common Stock
     that Arch was obligated to issue pursuant to Arch' stock plans, at a
     weighted average exercise price of $10.18 per share of Arch Common

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     Stock, each of such plans is listed in Section 5.1(b)(ii) of the Arch
     Disclosure Letter (collectively the "Arch Stock Plans"), and 5,902,702
     shares of Arch Common Stock that Arch was obligated to issue pursuant to
     outstanding warrants having an expiration date of September 1, 2001 and an
     effective exercise price of $9.03 per Share of Arch Common Stock. As of the
     date hereof, each outstanding Arch Series C Preferred Share is convertible
     into 6.7444 shares of Arch Common Stock. Each of the outstanding shares of
     capital stock or other securities of each of Arch' Significant Subsidiaries
     is duly authorized, validly issued, fully paid and nonassessable and owned
     by Arch or a direct or indirect wholly owned Subsidiary of Arch, free and
     clear of any lien, pledge, security interest, claim, or other encumbrance.
     Except as set forth above and except pursuant to the Arch Series B
     Preferred Shares or the Arch Series C Preferred Shares, there are no
     preemptive or other outstanding rights, options, warrants, conversion
     rights, stock appreciation rights, redemption rights, repurchase rights,
     agreements, arrangements or commitments to issue or sell any shares of
     capital stock or other securities of Arch or any of its Significant
     Subsidiaries or any securities or obligations convertible or exchangeable
     into, or exercisable for, or giving any Person a right to subscribe for or
     acquire, any securities of Arch or any of its Significant Subsidiaries, and
     no securities or obligations evidencing such rights are authorized, issued
     or outstanding. Arch does not have outstanding any bonds, debentures, notes
     or other debt obligations, the holders of which have the right to vote (or
     convertible into or exercisable for securities having the right to vote)
     with the stockholders of Arch on any matter. No shares of Arch Common Stock
     or Arch Preferred Shares are held by a Subsidiary of Arch. The authorized
     capital stock of Merger Sub consists of 1,000 shares of Common Stock, par
     value $0.01 per share, all of which are validly issued and outstanding. All
     of the issued and outstanding capital stock of Merger Sub is, and at the
     Effective Time will be, owned by Arch, and there are (i) no other shares of
     capital stock or other voting securities of Merger Sub, (ii) no securities
     of Merger Sub convertible into or exchangeable for shares of capital stock
     or other voting securities of Merger Sub and (iii) no options or other
     rights to acquire from Merger Sub, and no obligations of Merger Sub to
     issue, any capital stock, other voting securities or securities convertible
     into or exchangeable for capital stock or other voting securities of Merger
     Sub. Merger Sub has not conducted any business prior to the date of this
     Agreement and has no, and prior to the Effective Time will have no, assets,
     liabilities or obligations of any nature other than those incident to its
     formation and pursuant to this Agreement and the Merger and the other
     transactions contemplated by this Agreement.

          (c) Corporate Authority; Approval and Fairness.

          (i) PageNet has all requisite corporate power and authority and has
     taken all corporate action necessary in order to execute, deliver and
     perform its obligations under this Agreement and, subject only to adoption
     of this Agreement and approval of the Merger and the amendment to the
     PageNet certificate of incorporation to increase the number of PageNet
     Shares authorized to the amount sufficient to complete the transactions
     contemplated by this Agreement by the holders of a majority of the PageNet
     Shares in accordance with applicable law and PageNet's bylaws and charter
     and to the receipt of PageNet Required Consents (as defined in Section
     5.1(d)(i)), to consummate the Merger. This Agreement has been duly executed
     and delivered by PageNet and is a valid and binding agreement of PageNet,
     enforceable against PageNet in accordance with its terms, subject to
     bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and
     similar laws of general applicability relating to or affecting creditors'
     rights and to general equity principles (the "Bankruptcy and Equity
     Exception"). The Board of Directors of PageNet: (A) has unanimously
     approved and declared advisable this Agreement and the other transactions
     contemplated by this Agreement; and (B) has received the opinion of each of
     its financial advisors, Houlihan Lokey Howard & Zukin Capital, Goldman,
     Sachs & Co. and Morgan Stanley Dean Witter, in a customary form and to the
     effect that the Merger Consideration and the Distributed Interests, taken
     as a whole, to be received by the holders of PageNet Shares, on the date of
     such opinion, is fair to such holders from a financial point of view. The
     PageNet Shares when issued pursuant to the PageNet Exchange Offer (as
     defined in Section 6.18(a)), will be validly issued, fully paid and
     nonassessable, and no stockholder of PageNet will have any preemptive right
     of subscription or purchase with respect thereto.

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          (ii) Arch and Merger Sub each has all requisite corporate power and
     authority and has taken all corporate action necessary in order to execute,
     deliver and perform its obligations under this Agreement and, subject only
     to adoption of the Certificate Amendments (or this Agreement and the
     Alternative Merger if Arch is a party to the Alternative Merger) and the
     other transactions contemplated by this Agreement pursuant to this
     Agreement by a majority of the votes of the Arch Common Stock and Arch
     Series C Preferred Shares voting together in accordance with applicable law
     and Arch certificate of incorporation and bylaws (the "Arch Requisite
     Vote"), and to the receipt of the Arch Required Consents (as defined in
     Section 5.1(d)(i)), to consummate the Merger. This Agreement has been duly
     executed and delivered by Arch and Merger Sub and is a valid and binding
     agreement of Arch and Merger Sub, enforceable against Arch and Merger Sub
     in accordance with its terms, subject to the Bankruptcy and Equity
     Exception. The Board of Directors of Arch: (A) has unanimously approved and
     declared advisable this Agreement and the other transactions contemplated
     by this Agreement; and (B) has received the opinion of its financial
     advisor, Bear, Stearns & Co. Inc., in a customary form and to the effect
     that the Exchange Ratio, as of the date of such opinion, is fair to the
     public stockholders of Arch from a financial point of view. The shares of
     Arch Common Stock, when issued pursuant to this Agreement or the Arch
     Exchange Offer, will be validly issued, fully paid and nonassessable, and
     no stockholder of Arch will have any preemptive right of subscription or
     purchase with respect thereto.

          (d) Government Filings; No Violations.

          (i) Other than the filings, notices and/or approvals: (A) pursuant to
     Section 1.3 of this Agreement, or, in connection with the Bankruptcy Case
     and the Prepackaged Plan, the Final Confirmation Order; (B) under the
     Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the "HSR
     Act"), the Exchange Act, and the Securities Act of 1933, as amended (the
     "Securities Act"); (C) of the Federal Communications Commission (the "FCC")
     pursuant to the Communications Act of 1934, as amended (the "Communications
     Act"), or the rules, regulations, and policies of the FCC (the "FCC
     Regulations"); (D) of any state public utility commissions or similar state
     regulatory bodies (each, a "PUC") identified in its respective Disclosure
     Letter pursuant to applicable state laws (as defined in Section 5.1(i))
     regulating the paging or other telecommunications business ("State Laws");
     (E) to comply with state securities or "blue-sky" laws; and (F) of any
     local, state or federal governmental authorities required for a change in
     ownership of transmission sites (all of such filings and/or notices of Arch
     being referred to as the "Arch Required Consents" and of PageNet being
     referred to as the "PageNet Required Consents"), no notices, reports or
     other filings are required to be made by it with, nor are any consents,
     registrations, approvals, permits or authorizations required to be obtained
     by it from, any governmental or regulatory authority, court, agency,
     commission, body or other governmental entity ("Governmental Entity"), in
     connection with the execution and delivery of this Agreement by it and the
     consummation by it of the Merger and the other transactions contemplated by
     this Agreement, except those that the failure to make or obtain are not,
     individually or in the aggregate, reasonably likely to have a Material
     Adverse Effect on it or prevent, materially delay or materially impair its
     ability to (x) consummate the transactions contemplated by this Agreement
     or (y) operate its business following the Effective Time.

     The term "Governmental Regulations" includes the HSR Act, the
Communications Act, the FCC Regulations, State Laws, and any other antitrust,
competition, or telecommunications Law of the United States of America or any
other nation, province, territory or jurisdiction that must be satisfied or
complied with in order to consummate and make effective the Merger and the other
transactions contemplated by this Agreement.

          (ii) The execution, delivery and performance of this Agreement by it
     do not, and the consummation by it of the Merger and the other transactions
     contemplated by this Agreement will not, constitute or result in: (A) a
     breach or violation of, or a default under, its certificate of
     incorporation or bylaws or the comparable governing instruments of any of
     its Significant Subsidiaries or any entity in which it has an equity
     interest of 20% or more (collectively, with Significant Subsidiaries,
     "Significant Investees"); (B) a breach or violation of, or a default under,
     the

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     acceleration of any obligations or the creation of a lien, pledge, security
     interest or other encumbrance on its assets or the assets of any of its
     Significant Investees (with or without notice, lapse of time or both)
     pursuant to, any agreement, lease, contract, note, mortgage, indenture,
     arrangement or other obligation ("Contracts") binding upon it or any of its
     Significant Investees or any Law or governmental or non-governmental permit
     or license to which it or any of its Significant Investees is subject or is
     a party; or (C) any change in the rights or obligations of any party under
     any Contracts to which it or any of its Significant Investees is subject or
     is a party, except for such defaults, breaches, violations or accelerations
     as may result from the Bankruptcy Case or the Prepackaged Plan, and except,
     in the case of clauses (B) or (C) above for any breach, violation, default,
     acceleration, creation or change that, individually or in the aggregate, is
     not reasonably likely to have a Material Adverse Effect on it or prevent,
     materially delay or materially impair its ability to (x) consummate the
     transactions contemplated by this Agreement or (y) operate its business
     following the Effective Time. The PageNet Disclosure Letter, with respect
     to PageNet, and the Arch Disclosure Letter, with respect to Arch, sets
     forth a correct and complete list of Contracts to which it or any of its
     Significant Investees is a party, pursuant to which consents or waivers are
     or may be required prior to consummation of the transactions contemplated
     by this Agreement, other than as may be required in connection with the
     Bankruptcy Case or the Prepackaged Plan, or those where the failure to
     obtain such consents or waivers is not, individually or in the aggregate,
     reasonably likely to have a Material Adverse Effect on it or prevent or
     materially impair its (x) ability to consummate the transactions
     contemplated by this Agreement or (y) operate its business following the
     Effective Time.

          (e) Reports; Financial Statements.  It has made available to the other
     party each registration statement, report, proxy statement or information
     statement prepared by it since December 31, 1996, including without
     limitation its Annual Report on Form 10-K for the years ended December 31,
     1996, December 31, 1997 and December 31, 1998 in the form (including
     exhibits, annexes and any amendments thereto) filed with the Securities and
     Exchange Commission (the "SEC") (collectively, including any such reports
     filed subsequent to the date of this Agreement, its "Reports"). As of their
     respective dates, its Reports complied, as to form, with all applicable
     requirements under the Securities Act, the Exchange Act, and the rules and
     regulations thereunder, and (together with any amendments thereto filed
     prior to the date hereof) did not contain any untrue statement of a
     material fact or omit to state a material fact required to be stated
     therein or necessary to make the statements made therein, in light of the
     circumstances in which they were made, not misleading. Each of the
     consolidated balance sheets included in, or incorporated by reference into,
     its Reports (including the related notes and schedules) fairly presents the
     consolidated financial position of it and its Subsidiaries as of its date
     and each of the consolidated statements of income, stockholders' equity,
     and of cash flows included in, or incorporated by reference into, its
     Reports (including any related notes and schedules) fairly presents the
     consolidated results of operations, retained earnings and cash flows, as
     the case may be, of it and its Subsidiaries for the periods set forth
     therein (subject, in the case of unaudited statements, to notes and normal
     year-end audit adjustments that will not be material in amount or effect),
     in each case in accordance with generally accepted accounting principles
     ("GAAP") consistently applied during the periods involved, except as may be
     noted therein. It has made available to the other party all correspondence
     since December 31, 1996 between it or its representatives, on the one hand,
     and the SEC, on the other hand. To its knowledge, as of the date of this
     Agreement, there are no pending or threatened SEC inquiries or
     investigations relating to it or any of its Reports. To its knowledge and
     except as disclosed in its Reports or in filings by its holders with the
     SEC, as of the date of this Agreement, no Person or "group" "beneficially
     owns" 5% or more of its outstanding voting securities, with the terms
     "beneficially owns" and "group" having the meanings ascribed to them under
     Rule 13d-3 and Rule 13d-5 under the Exchange Act.

          (f) Absence of Certain Changes.  Except as disclosed in its Reports
     filed prior to the date of this Agreement or as expressly contemplated by
     this Agreement, since December 31, 1998 (the "Audit Date"), it and its
     Subsidiaries have conducted their respective businesses only in, and have
     not engaged in any material transaction other than according to, the
     ordinary and usual course of such businesses and there has not been: (i)
     any change in the business, assets (including licenses,

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     franchises and other intangible assets), financial condition and results of
     operations of it and its Subsidiaries, except those changes that are not,
     individually or in the aggregate, reasonably likely to have a Material
     Adverse Effect on it; (ii) any damage, destruction or other casualty loss
     with respect to any asset or property owned, leased or otherwise used by it
     or any of its Subsidiaries, whether or not covered by insurance, which
     damage, destruction or loss is reasonably likely, individually or in the
     aggregate, to have a Material Adverse Effect on it; (iii) any declaration,
     setting aside or payment of any dividend or other distribution with respect
     to its capital stock; or (iv) any change by it in accounting principles,
     practices or methods, except as required by GAAP. Since the Audit Date,
     except as provided for in this Agreement, in its respective Disclosure
     Letter, or as disclosed in its Reports filed prior to the date of this
     Agreement, there has not been any increase in the salary, wage, bonus,
     grants, awards, benefits or other compensation payable or that could become
     payable by it or any of its respective Subsidiaries, to directors, officers
     or key employees as identified in the corresponding section of each party's
     Disclosure Letter or any amendment of any of its Compensation and Benefit
     Plans (as defined in Section 5.1(h)(i)), other than increases or amendments
     in the ordinary and usual course of its business (which may include normal
     periodic performance reviews and related compensation and benefit increases
     and the provision of new individual compensation and benefits for promoted
     or newly hired officers and employees on terms consistent with past
     practice).

          (g) Litigation and Liabilities.  Except as disclosed in its Reports
     filed prior to the date of this Agreement, there are no: (x) (i) civil,
     criminal or administrative actions, suits, claims, hearings, investigations
     or proceedings pending or, to the actual knowledge of its executive
     officers identified in the corresponding section of each party's Disclosure
     Letter ("Knowledgeable Executives"), threatened against it or any of its
     Affiliates (as defined in Rule 12b-2 under the Exchange Act); or (ii)
     obligations or liabilities, whether or not accrued, contingent or
     otherwise, and whether or not required to be disclosed, including those
     relating to matters involving any Environmental Law, or (y) any other facts
     or circumstances, in any such case, of which the Knowledgeable Executives
     have actual knowledge and that are reasonably likely to result in any
     claims against or obligations or liabilities of it or any of its
     Affiliates, except, in the case of (x) or (y), those that are not,
     individually or in the aggregate, reasonably likely to have a Material
     Adverse Effect on it or prevent, materially delay or materially impair its
     ability to consummate the transactions contemplated by this Agreement.

          (h) Employee Benefits.

             (i) Neither it nor any of its respective ERISA Affiliates (as
        defined below) maintains, is a party to, participates in, or has any
        liability or contingent liability with respect to, any employee benefit
        plan (within the meaning of Section 3(3) of the Employee Retirement
        Income Security Act of 1974, as amended ("ERISA"), or any bonus,
        deferred compensation, pension, retirement, profit-sharing, thrift,
        savings, employee stock ownership, stock bonus, change-of-control, stock
        purchase, restricted stock, stock option, employment, consulting,
        termination, severance, compensation, medical, health or fringe benefit
        plan, or other plan, program, agreement, policy or arrangement for any
        of its agents, consultants, employees, directors, former employees or
        former directors and/or any of its respective ERISA Affiliates which
        does not constitute an employee benefit plan under ERISA (which employee
        benefit plans and other plans, programs, agreements, policies and
        arrangements are collectively referred to as the "Compensation and
        Benefit Plans"). A true and correct copy of each Compensation and
        Benefit Plan which have been reduced to writing and, to the extent
        applicable, copies of the most recent annual report, actuarial report,
        accountant's opinion of the plan's financial statements, summary plan
        description and Internal Revenue Service determination letter with
        respect to any Compensation and Benefit Plans and any trust agreements
        or insurance contracts forming a part of such Compensation and Benefit
        Plans has been made available by PageNet and Arch to the other party
        prior to the date of this Agreement. In the case of any Compensation and
        Benefit Plan which is not in written form, PageNet and Arch has supplied
        to the other party an accurate description of such Compensation and
        Benefit Plan as in effect on the date of this Agreement. For purposes of
        this Agreement, the term "ERISA Affiliate" means any corporation or
        trade or business which, together with

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        PageNet or Arch, as applicable, is a member of a controlled group of
        Persons or a group of trades or businesses under common control with
        PageNet or Arch, as applicable, within the meaning of Sections 414(b),
        (c), (m) or (o) of the Code.

             (ii) All Compensation and Benefit Plans, other than a multiemployer
        plan (as defined in Section 3(37) of ERISA), are in substantial
        compliance with all requirements of applicable law, including the Code
        and ERISA and no event has occurred which will or could cause any such
        Compensation and Benefit Plan to fail to comply with such requirements
        and no notice has been issued by any governmental authority questioning
        or challenging such compliance. There have been no acts or omissions by
        it or any of its respective ERISA Affiliates, which have given rise to
        or may give rise to material fines, penalties, taxes or related charges
        under Section 502 of ERISA or Chapters 43, 47, 68 or 100 of the Code for
        which PageNet, Arch, as applicable, or any of its respective ERISA
        Affiliates may be liable. Each of the Compensation and Benefit Plans
        that is an "employee pension benefit plan" within the meaning of Section
        3(2) of ERISA, other than a multiemployer plan (each a "Pension Plan"),
        and that is intended to be qualified under Section 401(a) of the Code
        has received a favorable determination letter from the Internal Revenue
        Service (the "IRS") which covers all changes in law for which the
        remedial amendment period (within the meaning of Section 401(b) of the
        Code and applicable regulations) has expired and neither it, nor any of
        its respective ERISA Affiliates is aware of any circumstances reasonably
        likely to result in revocation of any such favorable determination
        letter. There is no pending or, to the actual knowledge of PageNet's or
        Arch', as applicable, Knowledgeable Executives, threatened material
        litigation relating to its Compensation and Benefit Plans. Neither it,
        nor any of its respective ERISA Affiliates, has engaged in a transaction
        with respect to any of the Compensation and Benefit Plans that, assuming
        the taxable period of such transaction expired as of the date of this
        Agreement, would subject it or any of the ERISA Affiliates to a material
        tax or penalty imposed by either Section 4975 of the Code or Section 502
        of ERISA.

             (iii) As of the date of this Agreement, no liability under Title IV
        of ERISA (other than the payment of prospective premium amounts to the
        Pension Benefit Guaranty Corporation in the normal course) has been or
        is expected to be incurred by it or any of its respective ERISA
        Affiliates with respect to any Compensation and Benefit Plan. No notice
        of a "reportable event," within the meaning of Section 4043 of ERISA for
        which the 30-day reporting requirement has not been waived, has been
        required to be filed for any Pension Plans within the 12-month period
        ending on the date of this Agreement or will be required to be filed in
        connection with the transactions contemplated by this Agreement.

             (iv) All contributions required to be made under the terms of any
        of the Compensation and Benefit Plans as of the date of this Agreement
        have been timely made or have been reflected on the most recent
        consolidated balance sheet filed or incorporated by reference in its
        Reports prior to the date of this Agreement. None of the Pension Plans
        has an "accumulated funding deficiency" (whether or not waived) within
        the meaning of Section 412 of the Code or Section 302 of ERISA. Neither
        it, nor any of its respective ERISA Affiliates has provided, or is
        required to provide, security to any Pension Plans pursuant to Section
        401(a)(29) of the Code or to the PBGC pursuant to Title IV or ERISA.

             (v) Under each of the Pension Plans as of the last day of the most
        recent plan year ended prior to the date of this Agreement, the
        actuarially determined present value of all "benefit liabilities,"
        within the meaning of Section 4001(a)(16) of ERISA (as determined on the
        basis of the actuarial assumptions contained in such Pension Plan's most
        recent actuarial valuation), did not exceed the then current value of
        the assets of such Pension Plan, and there has been no material change
        in the financial condition of such Pension Plan since the last day of
        the most recent plan year.

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             (vi) Neither it, nor any of its respective ERISA Affiliates, have
        any obligations for post-termination health and life benefits under any
        of the Compensation and Benefit Plans, except as set forth in its
        Reports filed prior to the date of this Agreement or as required by
        applicable law.

             (vii) The consummation of the Merger (or the approval thereof by
        its respective stockholders) and the other transactions contemplated by
        this Agreement, will not (except as may result from, or be contemplated
        by, the Bankruptcy Case or the Prepackaged Plan): (x) entitle any of its
        employees or directors or any employees of any of its ERISA Affiliates,
        as applicable, to severance pay, directly or indirectly, upon
        termination of employment or otherwise; (y) accelerate the time of
        payment or vesting or trigger any payment of compensation or benefits
        under, or increase the amount payable or trigger any other material
        obligation pursuant to, any of the Compensation and Benefit Plans; or
        (z) result in any breach or violation of, or a default under, any of the
        Compensation and Benefit Plans.

             (viii) None of the Compensation and Benefit Plans is a
        multiemployer plan and neither it, nor any of its respective ERISA
        Affiliates, have contributed or been obligated to contribute to a
        multiemployer plan at any time.

          (i) Compliance with Laws. Except as set forth in its Reports filed
     prior to the date of this Agreement, the businesses of each of it and its
     Subsidiaries have not been, and are not being, conducted in violation of
     any law, statute, ordinance, regulation, judgment, order, decree,
     injunction, arbitration award, license, authorization, opinion, agency
     requirement or permit of any Governmental Entity or common law
     (collectively, "Laws"), except for violations or possible violations that
     are not, individually or in the aggregate, reasonably likely to have a
     Material Adverse Effect on it or prevent, materially delay or materially
     impair its ability to consummate the transactions contemplated by this
     Agreement. Except as set forth in its Reports filed prior to the date of
     this Agreement, no investigation or review by any Governmental Entity with
     respect to it or any of its Subsidiaries is pending or, to the actual
     knowledge of the Knowledgeable Executives, threatened, nor has any
     Governmental Entity indicated an intention to conduct the same, except for
     those the outcome of which are not, individually or in the aggregate,
     reasonably likely to have a Material Adverse Effect on it or prevent,
     materially delay or materially impair its ability to consummate the
     transactions contemplated by this Agreement. To the actual knowledge of the
     Knowledgeable Executives, no material change is required in its or any of
     its Subsidiaries' processes, properties or procedures in connection with
     any such Laws, and it has not received any notice or communication of any
     material noncompliance with any such Laws that has not been cured as of the
     date of this Agreement, except for such changes and noncompliance that are
     not, individually or in the aggregate, reasonably likely to have a Material
     Adverse Effect on it or prevent, materially delay or materially impair its
     ability to consummate the transactions contemplated by this Agreement. Each
     of it and its Subsidiaries has all permits, licenses, franchises,
     variances, exemptions, orders, operating rights, and other governmental
     authorizations, consents and approvals (collectively, "Permits"), necessary
     to conduct their business as presently conducted, except for those the
     absence of which are not, individually or in the aggregate, reasonably
     likely to have a Material Adverse Effect on it or prevent, materially delay
     or materially impair its ability to consummate the transactions
     contemplated by this Agreement.

          (j) Takeover Statutes; Charter and Bylaw Provisions.

             (i) The PageNet Board of Directors has taken all appropriate and
        necessary actions to exempt the Merger, this Agreement and the other
        transactions contemplated hereby from the restrictions of Section 203 of
        the DGCL. No other "control share acquisition," "fair price,"
        "moratorium" or other anti-takeover laws or regulations enacted under
        U.S. stated or federal laws (each a "Takeover Statute") apply to the
        Merger, this Agreement, or any of the other transactions contemplated
        hereby. PageNet and the PageNet Board of Directors have taken all
        appropriate and necessary actions to (A) render the PageNet Rights
        Agreement inapplicable to the Merger and the other transactions
        contemplated by this Agreement, (B) provide that (I) neither Arch nor
        Merger Sub shall be deemed an Acquiring Person (as defined in the
        PageNet Rights Agreement) as a result of this Agreement or the
        transactions contemplated

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        hereby and thereby, (II) no Distribution Date (as defined in the PageNet
        Rights Agreement) shall be deemed to have occurred as a result of this
        Agreement or the transactions contemplated hereby and (III) the rights
        issuable pursuant to the PageNet Rights Agreement will not separate from
        the shares of PageNet Common Stock, as a result of the approval,
        execution or delivery of this Agreement or the consummation of the
        transactions contemplated hereby, and (C) render any anti-takeover or
        other provision contained in the certificate of incorporation or by-laws
        of PageNet inapplicable to the Merger, this Agreement and the other
        transactions contemplated hereby.

             (ii) The Arch Board of Directors has taken all appropriate and
        necessary actions to exempt the Merger, this Agreement and the
        transactions contemplated hereby from the restrictions of Section 203 of
        the DGCL. No other Takeover Statute applies to this Agreement or any of
        the transactions contemplated hereby. Arch and the Arch Board of
        Directors have taken all appropriate and necessary actions to (A) amend
        the Arch Rights Agreement as set forth in Exhibit B to this Agreement,
        (B) provide that (I) PageNet shall not be deemed an Acquiring Person (as
        defined in the Arch Rights Agreement) as a result of this Agreement or
        the transactions contemplated thereby, (II) no Distribution Date (as
        defined in the Arch Rights Agreement) shall be deemed to have occurred
        as a result of this Agreement or the transactions contemplated thereby
        unless the ownership threshold set forth in Exhibit B shall be exceeded,
        and (III) the rights issuable pursuant to the Arch Rights Agreement will
        not separate from the shares of Arch Common Stock, as a result of the
        approval, execution or delivery of this Agreement or the consummation of
        the transactions contemplated hereby unless the ownership threshold set
        forth in Exhibit B shall be exceeded, and (C) render any anti-takeover
        or other provision contained in the certificate of incorporation or by-
        laws of Arch inapplicable to the Merger, this Agreement and the other
        transactions contemplated hereby.

          (k) Tax Matters.  As of the date of this Agreement, neither it nor any
     of its Subsidiaries has taken or agreed to take any action, nor do the
     Knowledgeable Executives have any actual knowledge of any fact or
     circumstance (excluding possible uncertainties regarding valuation of
     securities to be issued in the Merger and Exchange Offers), that would
     prevent the Merger and the other transactions contemplated by this
     Agreement from qualifying as a "reorganization" within the meaning of
     Section 368(a) of the Code.

          (l) Taxes.  It and each of its Subsidiaries have prepared in good
     faith and duly and timely filed (taking into account any extension of time
     within which to file) all material Tax Returns required to be filed by any
     of them at or before the Effective Time and all such filed Tax Returns are
     complete and accurate in all material respects. It and each of its
     Subsidiaries as of the Effective Time: (x) will have paid all Taxes and
     estimated Taxes (including all amounts shown to be due on all filed Tax
     Returns) that they are required to pay prior to the Effective Time; and (y)
     will have withheld or collected all federal, state and local income taxes,
     FICA, FUTA and other Taxes, including, without limitation, similar foreign
     Taxes, required to be withheld from amounts owing to any employee,
     creditor, or third party, and to the extent required, will have paid such
     amounts to the proper governmental authority. As of the date of this
     Agreement, (i) there are not pending or threatened in writing, any audits,
     examinations, investigations or other proceedings with respect to Taxes or
     Tax matters, and (ii) there are not, to the actual knowledge of its
     Knowledgeable Executives, any unresolved questions, claims or outstanding
     proposed or assessed deficiencies concerning its or any of its
     Subsidiaries' Tax liability which, if determined adversely would have a
     Material Adverse Effect on it. Neither it nor any of its Subsidiaries has
     any liability with respect to income, franchise or similar Taxes in excess
     of the amounts accrued with respect to such Taxes that are reflected in the
     financial statements included in its Reports. Neither it nor any of its
     Subsidiaries has executed any waiver of any statute of limitations on, or
     extended the period for the assessment or collection of, any Tax. There are
     no tax liens (other than liens for current Taxes not yet due and payable)
     upon its assets or the assets of any Subsidiary. There is no "Section 382
     limitation," as defined in Section 382(b) of the Code, currently applicable
     to its or its Subsidiaries' net operating loss, investment credit, or other
     tax attribute carryforwards. Neither it nor any of its Subsidiaries: (A) is
     a party to any tax sharing

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     agreement; or (B) is liable for the Tax obligations of any person other
     than it or one of its Subsidiaries.

     The term "Tax" (including, with correlative meaning, the terms "Taxes," and
"Taxable") includes all federal, state, local and foreign income, profits,
franchise, gross receipts, environmental, customs duty, capital stock,
severance, stamp, payroll, sales, employment, unemployment, disability, use,
property, withholding, excise, production, value added, occupancy and other
taxes, duties, charges, fees, or assessments of any nature whatsoever, together
with all interest, penalties and additions imposed with respect to such amounts
and any interest with respect to such penalties and additions. The term "Tax
Return" includes all federal, state, local and foreign returns and reports
(including elections, declarations, disclosures, schedules, estimates and
information returns) required to be supplied to a Tax authority relating to
Taxes.

          (m) Labor Matters.  Neither it nor any of its Subsidiaries is the
     subject of any material proceeding asserting that it or any of its
     Subsidiaries has committed an unfair labor practice or is seeking to compel
     it to bargain with any labor union or labor organization, nor is there
     pending or, to the actual knowledge of its Knowledgeable Executives,
     threatened, nor has there been for the past five years, any labor strike,
     dispute, walkout, work stoppage, slow-down or lockout involving it or any
     of its Subsidiaries, except in each case as is not, individually or in the
     aggregate, reasonably likely to have a Material Adverse Effect on it. None
     of the employees of PageNet or Arch or any of their respective Subsidiaries
     is subject to a collective bargaining agreement, no collective bargaining
     agreement is currently being negotiated, and no attempt is currently being
     made or during the past three (3) years has been made to organize any of
     its employees to form or enter into any labor union or similar
     organization.

          (n) Environmental Matters.  Except as disclosed in its Reports filed
     prior to the date of this Agreement and except for such matters that,
     individually or in the aggregate, are not reasonably likely to have a
     Material Adverse Effect on it: (i) each of it and its Subsidiaries has
     complied with all applicable Environmental Laws; (ii) the properties
     currently owned or operated by it or any of its Subsidiaries (including
     soils, groundwater, surface water, buildings, or other structures) do not
     contain any Hazardous Substances; (iii) the properties formerly owned or
     operated by it or any of its Subsidiaries did not contain any Hazardous
     Substances during the period of ownership or operation by it or any of its
     Subsidiaries; (iv) neither it nor any of its Subsidiaries is subject to
     liability for any Hazardous Substance disposal or contamination on any
     third party property; (v) neither it nor any Subsidiary has been associated
     with any release or threat of release of any Hazardous Substance; (vi)
     neither it nor any Subsidiary has received any notice, demand, letter,
     claim, or request for information alleging that it or any of its
     Subsidiaries may be in violation of or liable under any Environmental Law;
     (vii) neither it nor any of its Subsidiaries is subject to any orders,
     decrees, injunctions, or other arrangements with any Governmental Entity or
     is subject to any indemnity or other agreement with any third party
     relating to liability under any Environmental Law or relating to Hazardous
     Substances; and (viii) there are no circumstances or conditions involving
     it or any of its Subsidiaries that could reasonably be expected to result
     in any claims, liability, investigations, costs, or restrictions on the
     ownership, use, or transfer of any of its properties pursuant to any
     Environmental Law.

     The term "Environmental Law" means any Law relating to: (A) the protection,
investigation or restoration of the environment, health, safety, or natural
resources; (B) the handling, use, presence, disposal, release, or threatened
release of any Hazardous Substance; or (C) noise, odor, wetlands, pollution,
contamination, or any injury or threat of injury to persons or property or
notifications to government agencies or the public in connection with any
Hazardous Substance.

     The term "Hazardous Substance" means any substance that is listed,
classified, or regulated pursuant to any Environmental Law, including any
petroleum product or by-product, asbestos- containing material, lead-containing
paint or plumbing, polychlorinated biphenyls, electromagnetic fields, microwave
transmission, radioactive materials, or radon.

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          (o) Brokers and Finders.  Neither it nor any of its officers,
     directors or employees has employed any broker or finder or incurred any
     liability for any brokerage fees, commissions or finders' fees in
     connection with the Merger or the other transactions contemplated in this
     Agreement, except that: (i) PageNet has employed Houlihan Lokey Howard &
     Zukin Capital, Goldman, Sachs & Co. and Morgan Stanley Dean Witter as its
     financial advisors, the arrangements with which have been disclosed to Arch
     prior to the date of this Agreement; and (ii) Arch has employed Bear,
     Stearns & Co. Inc. as its financial advisor, the arrangements with which
     have been disclosed to PageNet prior to the date of this Agreement.

          (p) Computer Systems.  Except as set forth in its Reports: (i) its
     computer system performs and shall perform properly all date-sensitive
     functions with respect to dates prior to and after December 31, 1999; and
     (ii) it has developed feasible contingency plans to ensure uninterrupted
     and unimpaired business operation in the event of a failure of its own or a
     third party's computer system or equipment on or about January 1, 2000
     (including, those of vendors, customers, and suppliers, and a general
     failure of, or interruption in, its communications and delivery
     infrastructure).

          (q) FCC Licenses.  Each of Arch and PageNet, and each of its
     respective Subsidiaries, is the authorized and legal holder of, or
     otherwise has all rights to, all Permits issued under or pursuant to the
     Communications Act, the FCC Regulations, and State Laws which are necessary
     for the operation of their respective businesses as presently operated,
     except as would not, individually or in aggregate, have a Materially
     Adverse Effect on it. All such Permits and licenses are validly issued and
     in full force and effect, except as would not, individually or in the
     aggregate, have a Material Adverse Effect on it. Each of Arch and PageNet,
     and each of its respective Subsidiaries, is in compliance in all respects
     with the terms and conditions of each such Permit and with all applicable
     Governmental Regulations, except where the failure to be in compliance
     would not have a Material Adverse Effect on it. There is not pending, and
     to the actual knowledge of the Knowledgeable Executives of Arch and
     PageNet, as applicable, any threatened, action by or before the FCC or any
     governmental or regulatory authority to revoke, suspend, cancel, rescind,
     or modify in any material respect any of such party's Permits rights under
     the Communications Act, the FCC Regulations or State Laws. Each party has
     made all regulatory filings required, and paid all fees and assessments
     imposed, by any Governmental Entity, and all such filings and the
     calculation of such fees, are accurate in all material respects, except
     where the failure to make such filing or pay such fees or assessments would
     not have a Material Adverse Effect on such party.

                                  ARTICLE VI.

                                   COVENANTS

     6.1.  Interim Operations.

     (a) PageNet covenants and agrees as to itself and its Subsidiaries that,
from and after the date of this Agreement and prior to the Effective Time
(unless Arch shall otherwise approve in writing, and except as otherwise
expressly contemplated by this Agreement, disclosed in the PageNet Disclosure
Letter, or required by applicable Law):

          (i) Its business and the business of its Subsidiaries shall be
     conducted only in the ordinary and usual course and, to the extent
     consistent therewith, it and its Subsidiaries shall use their reasonable
     best efforts to preserve their respective business organizations intact and
     maintain their respective existing relations and goodwill with customers,
     suppliers, regulators, distributors, creditors, lessors, employees and
     business associates;

          (ii) It shall not: (A) amend its certificate of incorporation or
     bylaws; (B) split, combine, subdivide or reclassify its outstanding shares
     of capital stock; (C) declare, set aside or pay any dividend payable in
     cash, stock or property with respect to any capital stock; or (D)
     repurchase, redeem or otherwise acquire, except in connection with existing
     commitments under PageNet Stock Plans but subject to PageNet's obligations
     under subparagraph (iii) below, or permit any of its
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     Subsidiaries to purchase or otherwise acquire, any shares of its capital
     stock or any securities convertible into, or exchangeable or exercisable
     for, any shares of its capital stock;

          (iii) Neither it nor any of its Subsidiaries shall take any action
     that would prevent the Merger from qualifying as a "reorganization" within
     the meaning of Section 368(a) of the Code or that would cause any of its
     representations and warranties in this Agreement to become untrue in any
     material respect;

          (iv) Neither it nor any of its ERISA Affiliates shall: (A) accelerate,
     amend or change the period of exercisability of or terminate, establish,
     adopt, enter into, make any new grants or awards of stock-based
     compensation or other benefits under any Compensation and Benefit Plans;
     (B) amend or otherwise modify any Compensation and Benefit Plan; or (C)
     increase the salary, wage, bonus or other compensation of any directors,
     officers or key employees, except: (x) for grants or awards to directors,
     officers and employees of it or its Subsidiaries under existing
     Compensation and Benefit Plans in such amounts and on such terms as are
     consistent with past practice; (y) in the ordinary and usual course of its
     business (which may include normal periodic performance reviews and related
     compensation and benefit increases and the provision of individual PageNet
     Compensation and Benefit Plans consistent with past practice for promoted
     or newly hired officers and employees on terms consistent with past
     practice);or (z) for actions necessary to satisfy existing contractual
     obligations under Compensation and Benefit Plans existing as of the date of
     this Agreement;

          (v) Neither it nor any of its Subsidiaries shall incur, repay or
     retire prior to maturity or refinance any indebtedness for borrowed money
     or guarantee any such indebtedness or issue, sell, repurchase or redeem
     prior to maturity any debt securities or warrants or rights to acquire any
     debt securities or guarantee any debt securities of others, except (A) in
     the ordinary and usual course of its business, (B) for any refinancing of
     such indebtedness or debt securities on terms no less favorable in the
     aggregate to PageNet and which would not prevent, materially delay or
     materially impair PageNet's ability to consummate the transactions
     contemplated by this Agreement, and (C) for any retirement in exchange for
     PageNet Shares consistent with past practice;

          (vi) Neither it nor any of its Subsidiaries shall make any capital
     expenditures in an aggregate amount in excess of the aggregate amount
     reflected in PageNet's capital expenditure budget for the fiscal years
     ending December 31, 1999 and 2000, a copy of which has been provided to
     Arch;

          (vii) Neither it nor any of its Subsidiaries shall issue, deliver,
     sell, pledge or encumber shares of any class of its capital stock or any
     securities convertible or exchangeable into, or any rights, warrants or
     options to acquire, or any bonds, debentures, notes, or other debt
     obligations having the right to vote or that are convertible or exercisable
     for, any such shares, except PageNet may issue PageNet Shares in exchange
     for indebtedness or debt securities pursuant to clause (v) above;

          (viii) Neither it nor any of its Subsidiaries shall authorize, propose
     or announce an intention to authorize or propose, or enter into an
     agreement with respect to, any merger, consolidation or business
     combination (other than the Merger), or any purchase, sale, lease, license
     or other acquisition or disposition of any business or of a material amount
     of assets or securities, except for transactions entered into in the
     ordinary and usual course of its business, except for any acquisition of
     assets or any investment having a cash purchase price of $25,000,000 or
     less in any single instance and $50,000,000 or less in the aggregate where
     such acquisition or investment would not prevent, materially delay or
     materially impair PageNet's ability to consummate the transactions
     contemplated by this Agreement;

          (ix) PageNet shall not make any material change in its accounting
     policies or procedures, other than any such change that is required by
     GAAP;

          (x) PageNet shall not release, assign, settle or compromise any
     material claims or litigation in excess of $300,000 or make any material
     tax election or settle or compromise any material federal, state, local or
     foreign tax liability; and

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          (xi) Neither it nor any of its Subsidiaries shall authorize or enter
     into any agreement to do any of the foregoing.

     (b) Arch covenants and agrees as to itself and its Subsidiaries that, from
and after the date of this Agreement and prior to the Effective Time (unless
PageNet shall otherwise approve in writing and except as otherwise expressly
contemplated by this Agreement, disclosed in the Arch Disclosure Letter, or
required by applicable Law):

          (i) Its business and the business of its Subsidiaries shall be
     conducted only in the ordinary and usual course and, to the extent
     consistent therewith, it and its Subsidiaries shall use their reasonable
     best efforts to preserve their respective business organizations intact and
     maintain their respective existing relations and goodwill with customers,
     suppliers, regulators, distributors, creditors, lessors, employees and
     business associates;

          (ii) It shall not: (A) amend its certificate of incorporation or
     bylaws; (B) split, combine, subdivide or reclassify its outstanding shares
     of capital stock; (C) declare, set aside or pay any dividend payable in
     cash, stock or property with respect to any capital stock, except for a
     dividend that would be received by holders of PageNet Shares on an
     equivalent post-Merger basis per share of Arch Common Stock after the
     Effective Time; or (D) repurchase, redeem or otherwise acquire, except in
     connection with existing commitments under Arch Stock Plans but subject to
     Arch' obligations under subparagraph (iii) below, or permit any of its
     Subsidiaries to purchase or otherwise acquire, any shares of its capital
     stock or any securities convertible into, or exchangeable or exercisable
     for, any shares of its capital stock;

          (iii) Neither it nor any of its Subsidiaries shall take any action
     that would prevent the Merger from qualifying as a "reorganization" within
     the meaning of Section 368(a) of the Code or that would cause any of its
     representations and warranties in this Agreement to become untrue in any
     material respect;

          (iv) Neither it nor any of its ERISA Affiliates shall: (A) accelerate,
     amend or change the period of exercisability of or terminate, establish,
     adopt, enter into, make any new grants or awards of stock-based
     compensation or other benefits under any Compensation and Benefit Plans;
     (B) amend or otherwise modify any Compensation and Benefit Plan; or (C)
     increase the salary, wage, bonus or other compensation of any directors,
     officers or key employees, except: (x) for grants or awards to directors,
     officers and employees of it or its Subsidiaries under existing
     Compensation and Benefit Plans in such amounts and on such terms as are
     consistent with past practice; (y) in the ordinary and usual course of its
     business (which may include normal periodic performance reviews and related
     compensation and benefit increases and the provision of individual Arch
     Compensation and Benefit Plans consistent with past practice for promoted
     or newly hired officers and employees on terms consistent with past
     practice); or (z) for actions necessary to satisfy existing contractual
     obligations under its Compensation and Benefit Plans existing as of the
     date of this Agreement;

          (v) Neither it nor any of its Subsidiaries shall incur, repay or
     retire prior to maturity or refinance any indebtedness for borrowed money
     or guarantee any such indebtedness or issue, sell, repurchase or redeem
     prior to maturity any debt securities or warrants or rights to acquire any
     debt securities or guarantee any debt securities of others, except in (A)
     the ordinary and usual course of its business, (B) for any refinancing of
     such indebtedness or debt securities on terms no less favorable in the
     aggregate to Arch and which would not prevent, materially delay or
     materially impair Arch' or Merger Sub's ability to consummate the
     transactions contemplated by this Agreement, and (C) for any retirement in
     exchange for shares of Arch Common Stock consistent with past practice;

          (vi) Neither it nor any of its Subsidiaries shall make any capital
     expenditures in an aggregate amount in excess of the aggregate amount
     reflected in Arch' capital expenditure budget for the fiscal years ending
     December 31, 1999 and 2000, a copy of which has been provided to PageNet;

          (vii) Neither it nor any of its Subsidiaries shall issue, deliver,
     sell, pledge or encumber shares of any class of its capital stock or any
     securities convertible or exchangeable into, or any rights, warrants
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     or options to acquire, or any bonds, debentures, notes, or other debt
     obligations having the right to vote or that are convertible or exercisable
     for, any such shares, except Arch may issue shares of Arch Common Stock
     issued in exchange for indebtedness or debt securities pursuant to clause
     (v) above;

          (viii) Neither it nor any of its Subsidiaries shall authorize, propose
     or announce an intention to authorize or propose, or enter into an
     agreement with respect to, any merger, consolidation or business
     combination (other than the Merger), or any purchase, sale, lease, license
     or other acquisition or disposition of any business or of a material amount
     of assets or securities, except for transactions entered into in the
     ordinary and usual course of its business, except for any acquisition of
     assets or any investment having a cash purchase price of $25,000,000 or
     less in any single instance and $50,000,000 or less in the aggregate where
     such acquisition or investment would not prevent, materially delay or
     materially impair Arch' or Merger Sub's ability to consummate the
     transactions contemplated by this Agreement;

          (ix) Arch shall not make any material change in its accounting
     policies or procedures, other than any such change that is required by
     GAAP;

          (x) Arch shall not release, assign, settle or compromise any material
     claims or litigation in excess of $300,000 or make any material tax
     election or settle or compromise any material federal, state, local or
     foreign tax liability; and

          (xi) Neither it nor any of its Subsidiaries shall authorize or enter
     into any agreement to do any of the foregoing.

     (c) Arch and PageNet agree that any written approval obtained under this
Section 6.1 must be signed, if on behalf of Arch, by the Chief Executive Officer
or the Chief Financial Officer of Arch, or if on behalf of PageNet, by the
Chairman of the Board and Chief Executive Officer or President and Chief
Operating Officer of PageNet.

     (d) Notwithstanding any other provision hereof to the contrary, PageNet
may, after the date hereof (i) issue, deliver, sell, pledge or encumber in
arms-length transactions with unaffiliated third parties shares of any class of
capital stock of the Distributed Subsidiary or any securities convertible or
exchangeable into, or any rights, warrants or options to acquire, or any bonds,
debentures, notes, or other debt obligations having the right to vote or that
are convertible or exercisable for, any such shares of the Distributed
Subsidiary, (ii) cause the Distributed Subsidiary to incur any indebtedness for
borrowed money, if all proceeds thereof are used solely by the Distributed
Subsidiary, (iii) transfer the assets set forth in the corresponding section of
the PageNet Disclosure Letter to the Distributed Subsidiary, (iv) determine the
form of security or securities representing the equity ownership of the
Distributed Subsidiary to be distributed to the holders of PageNet Shares or
PageNet Notes pursuant to Sections 6.18 and 6.22 of this Agreement and designate
the rights and restrictions applicable to such securities, (v) establish an
employee stock option, stock ownership or other similar plan and set aside
common equity (of the same type as the Distributed Interests or any securities
underlying such Distributed Interests) representing up to 20% of the equity
ownership of the Distributed Subsidiary for such purpose, or (vi) enter into
such transactions, arrangements or agreements with the Distributed Subsidiary on
terms and conditions approved by Arch or cause the Distributed Subsidiary to
enter into arms-length transactions, arrangements or agreements with third
parties, in each case, as are reasonably necessary and appropriate to permit the
Distributed Subsidiary to continue its business and operations in the ordinary
course following the Merger; provided, that the taking of such action shall not
cause Arch or the Surviving Corporation (other than through its ownership of
capital stock in the Distributed Subsidiary after the Effective Time) to incur
any liability or obligation which would not have been incurred by the Surviving
Corporation pursuant to the Merger or the other transactions contemplated
hereby. It is understood and agreed by the parties to this Agreement, that in
the event that, prior to or at the Effective Time, PageNet shall take any action
set forth in (i), (ii), (v) or (vi) above that reduces the aggregate amount of
Distributed Interests available to be distributed to the parties, the
distribution of the Distributed Interests will be ratably adjusted such that
holders of PageNet Shares at the Vast Distribution Record Date and holders of
PageNet Notes immediately prior to the Effective Time receive 80.5% of the
remaining interests
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in the Distributed Subsidiary and the Surviving Corporation receives 19.5% of
the remaining interests in the Distributed Subsidiary.

     6.2.  Acquisition Proposals.

     (a) Except as set forth in Section 6.1(d) of this Agreement, PageNet and
Arch each agree that neither it nor any of its Subsidiaries nor any of the
officers and directors of it or its Subsidiaries shall, and that each shall
direct and use its best efforts to cause its and its Subsidiaries' employees,
agents and representatives (including any investment banker, attorney or
accountant retained by it or any of its Subsidiaries) (PageNet or Arch, as the
case may be, its respective Subsidiaries and their officers, directors,
employees, agents and representatives being referred to as its
"Representatives") not to, directly or indirectly, initiate, solicit, encourage
or otherwise facilitate any inquiries or the making of any proposal or offer
with respect to a merger, reorganization, acquisition, share exchange,
consolidation, business combination, recapitalization, liquidation, dissolution
or similar transaction involving it, or any purchase or sale of the consolidated
assets (including without limitation stock of Subsidiaries) of it or any of its
Subsidiaries, taken as a whole, having an aggregate value equal to 10% or more
of its assets, or any purchase or sale of, or tender or exchange offer for, 15%
or more of its equity securities (any such proposal or offer being referred to
as an "Acquisition Proposal"). PageNet and Arch further agree that neither it
nor any of its Subsidiaries nor any of the officers and directors of it or its
Subsidiaries shall, and that it shall direct and use its best efforts to cause
its Representatives not to, directly or indirectly, have any discussion with, or
provide any confidential information or data to, any Person relating to, or in
contemplation of, an Acquisition Proposal or engage in any negotiations
concerning an Acquisition Proposal, or otherwise facilitate any effort or
attempt to make or implement an Acquisition Proposal; provided, however, that
nothing contained in this Agreement shall prevent PageNet, Arch or their
respective Board of Directors from: (A) complying with Rule 14e-2 promulgated
under the Exchange Act with regard to an Acquisition Proposal; (B) engaging in
any discussions or negotiations with or providing any information to, any Person
in response to an unsolicited bona fide written Acquisition Proposal by any such
Person; or (C) subject to the obligation of (x) PageNet pursuant to Section
6.5(a) to duly convene a PageNet Stockholders Meeting at which a vote of the
stockholders of PageNet shall be taken regarding the adoption of this Agreement
and the approval of the Merger and the other transactions contemplated by this
Agreement, and (y) Arch pursuant to Section 6.5(b) to duly convene a Arch
Stockholders Meeting at which a vote of the stockholders of Arch shall be taken
with respect to the matters set forth in Section 6.5(b) of this Agreement,
recommending such an unsolicited bona fide written Acquisition Proposal to its
stockholders if, and only to the extent that, with respect to the actions
referred to in clauses (B) or (C): (i) its Board of Directors concludes in good
faith (after consultation with its outside legal counsel and its financial
advisor) that such Acquisition Proposal is reasonably capable of being
completed, taking into account all legal, financial, regulatory and other
aspects of the proposal and the Person making the proposal, and would, if
consummated, result in a transaction more favorable to its stakeholders from a
financial point of view than the transaction contemplated by this Agreement (any
such Acquisition Proposal being referred to herein as a "Superior Proposal");
(ii) its Board of Directors determines in good faith after consultation with
outside legal counsel that such action is necessary for the Board of Directors
to comply with its fiduciary duty to its stakeholders under applicable Law; and
(iii) prior to providing any information or data to any Person in connection
with a Superior Proposal by any such Person, its Board of Directors shall
receive from such Person an executed confidentiality agreement on terms
substantially similar to those contained in the Confidentiality Agreement (as
defined in Section 6.15); provided, that such confidentiality agreement shall
contain terms that allow it to comply with its obligations under this Section
6.2.

     (b) PageNet and Arch each agree that it will immediately cease and cause to
be terminated any existing activities, discussions or negotiations with any
parties conducted heretofore with respect to any Acquisition Proposal. PageNet
and Arch each agree that it will take the necessary steps to promptly inform
each of its Representatives of the obligations undertaken in Section 6.2(a).
PageNet and Arch each agree that it will notify the other party immediately if
any such inquiries, proposals or offers are received by, any such information is
requested from, or any such discussions or negotiations are sought to

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be initiated or continued with, any of its Representatives indicating, in
connection with such notice, the name of such Person making such inquiry,
proposal, offer or request and the substance of any such inquiries, proposals or
offers. Such party thereafter shall keep the other informed, on a current basis,
of the status and terms of any such inquiries, proposals or offers and the
status of any such discussions or negotiations. PageNet and Arch each also agree
that it will promptly request each Person that has heretofore executed a
confidentiality agreement in connection with its consideration of any
Acquisition Proposal to return all confidential information heretofore furnished
to such Person by, or on behalf of, it or any of its Subsidiaries.

     6.3.  The Certificate Amendments.  Arch shall take all actions necessary
(subject to applicable law and any necessary stockholder approval) to adopt the
Certificate Amendments. The Certificate Amendments shall provide for an increase
in the authorized number of shares of Arch Common Stock to an amount sufficient
to effectuate the actions contemplated hereby and, if Arch so elects, may
provide for the conversion of each share of Arch Class B Common Stock into one
share of Arch Common Stock. Some or all of the Certificate Amendments may, in
the discretion of Arch, be made contingent upon the consummation of the Merger
or the Alternative Merger (as the case may be).

     6.4.  Information Supplied.  PageNet and Arch each agrees, as to itself and
its Subsidiaries, that none of the information supplied or to be supplied by it
or its Subsidiaries for inclusion or incorporation by reference in: (i) the
Registration Statement on Form S-4 to be filed with the SEC by Arch in
connection with the issuance of shares of Arch Common Stock in the Merger
(including the joint proxy statement and prospectus (the "Prospectus/Proxy
Statement") constituting a part thereof) (the "S-4 Registration Statement")
will, at the time the S-4 Registration Statement becomes effective under the
Securities Act; and (ii) the Prospectus/Proxy Statement and any amendment or
supplement thereto will, at the date of mailing to stockholders and at the time
of each of the PageNet Stockholders Meeting and the Arch Stockholders Meeting to
be held in connection with the Merger, in any such case, contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary in order to make the statements therein, in light of
the circumstances under which they were made, not misleading. If at any time
prior to the Effective Time any information relating to Arch or PageNet, or any
of their respective affiliates (as defined in SEC Rule 12b-2), officers or
directors, is discovered by Arch or PageNet which should be set forth in an
amendment or supplement to any of the S-4 Registration Statement or the
Prospectus/Proxy Statement, so that any of such documents would not include any
misstatement of a material fact or would omit to state any material fact
required to be stated therein or necessary to make the statements therein, in
the light of the circumstances under which they were made, not misleading, the
party which discovers such information shall promptly notify the other parties
to this Agreement and an appropriate amendment or supplement describing such
information shall be promptly filed with the SEC and, to the extent required by
law, disseminated to the stockholders of PageNet and Arch.

     6.5.  Stockholders Meetings.

     (a) PageNet will take, in accordance with applicable Law and its
certificate of incorporation and bylaws, all action necessary to convene a
meeting of its stockholders (the "PageNet Stockholders Meeting") as promptly as
practicable after the S-4 Registration Statement is declared effective to
consider and vote upon the adoption of this Agreement, and to approve the
Merger, an amendment to the PageNet certificate of incorporation to increase the
number of PageNet Shares authorized to an amount sufficient to complete the
transactions contemplated by this Agreement and the other transactions
contemplated by this Agreement. PageNet will take all necessary action to obtain
the adoption of this Agreement, the approval of the Merger, the amendment to the
PageNet certificate of incorporation to increase the number of PageNet Shares
authorized to the amount sufficient to complete the transactions contemplated by
this Agreement and the other transactions contemplated by this Agreement by the
holders of the PageNet Shares (the "PageNet Stockholders Approval"). The Board
of Directors of PageNet shall: (i) recommend that the stockholders adopt this
Agreement and thereby approve the Merger and the other transactions contemplated
by this Agreement (including without limitation adoption of the Prepackaged Plan
and authorization of the Bankruptcy Case) and the amendment to the PageNet
certificate of incorporation to
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increase the number of PageNet Shares authorized to the amount sufficient to
complete the transactions contemplated by this Agreement; and (ii) take all
lawful action to solicit such adoption and approval; provided, however, that
PageNet's Board of Directors may, at any time prior to the Effective Time,
withdraw, modify or change any such recommendation to the extent that PageNet's
Board of Directors determines in good faith, after consultation with outside
legal counsel, that such withdrawal, modification or change of its
recommendation is required by its fiduciary duties to PageNet's stockholders
under applicable Law; provided, further, that, unless this Agreement is
terminated by Arch pursuant to Section 8.4, PageNet shall, as promptly as
practicable after the S-4 Registration Statement is declared effective, duly
convene and complete the PageNet Stockholders Meeting regarding the adoption of
this Agreement and the approval of the Merger, the amendment to the PageNet
certificate of incorporation set forth above and the other transactions
contemplated by this Agreement, regardless of whether PageNet's Board of
Directors has withdrawn, modified, or changed its recommendation to the
stockholders regarding the adoption of this Agreement or the approval of the
Merger, the amendment to the PageNet certificate of incorporation set forth
above or the other transactions contemplated by this Agreement prior to such
PageNet Stockholders Meeting. Notwithstanding the foregoing or any other
provision of this Agreement to the contrary, PageNet shall not be required to
convene a PageNet Stockholders Meeting after (x) the Bankruptcy Case has
commenced or (y) PageNet stipulates to bankruptcy relief after the occurrence of
an Involuntary Insolvency Event pursuant to Section 6.19(a)(v) hereof.

     (b) Arch will take, in accordance with applicable Law and its certificate
of incorporation and bylaws, all action necessary to convene a meeting of its
stockholders (the "Arch Stockholders Meeting") as promptly as practicable after
the S-4 Registration Statement is declared effective to (i) consider and vote
upon (A) the Certificate Amendments and the issuance of shares of Arch Common
Stock pursuant to the Merger, the conversion of the Arch Class B Common Stock
(if Arch elects to have such shares converted pursuant to the Certificate
Amendments) and the Arch Exchange Offer or (B) if the Alternative Merger is
elected pursuant to Section 4.5 and Arch is a party to the Alternative Merger,
the adoption of this Agreement and the approval of the Alternative Merger and
the other transactions contemplated by this Agreement (including the actions
contemplated by the Certificate Amendments, which may be effectuated pursuant to
a certificate of merger filed in connection with such Alternative Merger); and
(ii) to approve any actions necessary pursuant to Section 3.1 hereof (with
respect to all matters other than the approval of the conversion of the Arch
Class B Common Stock pursuant to the Certificate Amendment, the "Arch
Stockholder Approval"). Arch will take all necessary action to obtain such
consents and approvals. The Board of Directors of Arch shall: (i) recommend that
the stockholders adopt the Certificate Amendments and approve the issuance of
Arch Common Stock pursuant to the Merger, the conversion of the Arch Class B
Common Stock (if Arch elects to have such shares converted pursuant to the
Certificate Amendments) and the Arch Exchange Offer (or this Agreement and the
Alternative Merger if Arch is a party to the Alternative Merger) and the other
transactions contemplated by this Agreement; and (ii) take all lawful action to
solicit such adoption; provided, however, that Arch' Board of Directors may, at
any time prior to the Effective Time, withdraw, modify or change any such
recommendation to the extent that Arch' Board of Directors determines in good
faith, after consultation with outside legal counsel, that such withdrawal,
modification or change of its recommendation is required by its fiduciary duties
to Arch' stockholders under applicable Law; provided, further, that, unless this
Agreement is terminated by PageNet pursuant to Section 8.3, Arch shall, as
promptly as practicable after the S-4 Registration Statement is declared
effective, duly convene and complete the Arch Stockholders Meeting regarding the
adoption of the Certificate Amendments and the issuance of shares of Arch Common
Stock pursuant to the Merger, the conversion of the Arch Class B Common Stock
(if Arch elects to have such shares converted pursuant to the Certificate
Amendments) and the Arch Exchange Offer (or this Agreement and the Alternative
Merger if Arch is a party to the Alternative Merger) and the other transactions
contemplated by this Agreement, regardless of whether Arch' Board of Directors
has withdrawn, modified, or changed its recommendation to the stockholders
regarding the adoption of the Certificate Amendments and the issuance of shares
of Arch Common Stock pursuant to the Merger, the conversion of the Arch Class B
Common Stock (if Arch elects to have such shares converted pursuant to the
Certificate Amendments) and the Arch Exchange Offer (or this Agreement and the
Alternative Merger if Arch is a

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party to the Alternative Merger) or the other transactions contemplated by this
Agreement prior to such Arch Stockholders Meeting.

     6.6.  Filings; Other Actions; Notification.

     (a) Arch and PageNet shall promptly prepare and file with the SEC the
Prospectus/Proxy Statement, and Arch shall prepare and file with the SEC the S-4
Registration Statement as promptly as practicable. Arch and PageNet each shall
use its reasonable best efforts to have the S-4 Registration Statement declared
effective under the Securities Act as promptly as practicable and on the same
day as each of the Exchange Registration Statements, and promptly thereafter
mail the Prospectus/Proxy Statement to the stockholders of Arch and PageNet.
Arch shall also use its reasonable best efforts to obtain prior to the effective
date of the S-4 Registration Statement all necessary state securities law or
"blue sky" permits and approvals required in connection with the Merger and the
other transactions contemplated by this Agreement and will pay all expenses
incident thereto. Each party shall notify the other of the receipt of the
comments of the SEC and of any requests by the SEC for amendments or supplements
to the Prospectus/Proxy Statement or the S-4 Registration Statement or for
additional information and shall promptly supply one another with copies of all
correspondence between any of them (or their Representatives) and the SEC (or
its staff) with respect thereto. If, at any time prior to either of the Arch
Stockholders Meeting or the PageNet Stockholders Meeting, any event shall occur
relating to or affecting Arch, PageNet, or their respective officers or
directors, which event should be described in an amendment or supplement to the
Prospectus/Proxy Statement or the S-4 Registration Statement, the parties shall
promptly inform one another and shall cooperate in promptly preparing filing and
clearing with the SEC and, if required by applicable securities laws, mailing to
Arch' or PageNet's stockholders, as the case may be, such amendment or
supplement.

     (b) PageNet and Arch each shall use its respective reasonable best efforts
to cause to be delivered to the other party and its directors a letter of its
independent auditors, dated: (i) the date on which the S-4 Registration
Statement and the Exchange Registration Statements shall become effective; and
(ii) the Closing Date, and addressed to the other party and its directors, in
form and substance customary for "comfort" letters delivered by independent
public accountants in connection with registration statements similar to the S-4
Registration Statement and the Exchange Registration Statements.

     (c) PageNet and Arch shall cooperate with each other and use (and shall
cause their respective Subsidiaries to use) their respective reasonable best
efforts: (i) to take or cause to be taken all actions, and do or cause to be
done all things, necessary, proper or advisable on its part under this Agreement
and applicable Laws to consummate and make effective the Merger, the Exchange
Offers and the other transactions contemplated by this Agreement (including, if
necessary, the Prepackaged Plan) as soon as practicable, including: (A)
obtaining opinions of their respective attorneys referred to in Article VII
below; (B) preparing and filing as promptly as practicable all documentation to
effect all necessary applications, notices, petitions, filings and other
documents; and (C) instituting court actions or other proceedings necessary to
obtain the approvals required to consummate the Merger, the Exchange Offers or
the other transactions contemplated by this Agreement or defending or otherwise
opposing all court actions or other proceedings instituted by a Governmental
Entity or other Person under the Governmental Regulations for purposes of
preventing the consummation of the Merger, the Exchange Offers and the other
transactions contemplated by this Agreement; and (ii) to obtain as promptly as
practicable all consents, registrations, approvals, permits and authorizations
necessary or advisable to be obtained from any third party and/or any
Governmental Entity in order to consummate the Merger, the Exchange Offers or
any of the other transactions contemplated by this Agreement; provided, however,
that nothing in this Section 6.5 shall require either Arch or PageNet to agree
to any divestitures or hold separate or similar arrangements if such
divestitures or arrangements would reasonably be expected to have a material
adverse effect on Arch or PageNet, or a material adverse effect on the expected
benefits of the Merger to it. Neither Arch nor PageNet will agree to any
divestitures or hold separate or similar arrangements without the prior written
approval of the other party. Subject to applicable laws relating to the exchange
of information, Arch and PageNet shall have the right to review in advance, and
to the extent practicable each will consult the other party on, all the
information relating to Arch or PageNet, as the case may be, and any of their
respective
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Subsidiaries, that appear in any filing made with, or written materials
submitted to, any third party and/or any Governmental Entity in connection with
the Merger and the other transactions contemplated by this Agreement. In
exercising the foregoing right, each of PageNet and Arch shall act reasonably
and as promptly as practicable.

     (d) PageNet and Arch each shall, upon request by the other party, furnish
the other party with all information concerning itself, its Subsidiaries,
directors, officers and stockholders and such other matters as may be reasonably
necessary or advisable in connection with the Prospectus/Proxy Statement, the
S-4 Registration Statement, the Exchange Registration Statements or any other
statement, filing, notice or application made by, or on behalf of, Arch, PageNet
or any of their respective Subsidiaries to any third party and/or any
Governmental Entity in connection with the Merger, the Exchange Offers and the
transactions contemplated by this Agreement.

     (e) PageNet and Arch each shall keep the other party apprised of the status
of matters relating to completion of the transactions contemplated by this
Agreement, including promptly furnishing the other party with copies of notices
or other communications received by Arch or PageNet, as the case may be, or any
of its Subsidiaries, from any third party and/or any Governmental Entity with
respect to the Merger, the Exchange Offers and the other transactions
contemplated by this Agreement. Each of PageNet and Arch shall give prompt
notice to the other party of any change that is reasonably likely to result in a
Material Adverse Effect on it or of any failure of any conditions to the other
party's obligations to effect the Merger set forth in Article VII.

     (f) Each of PageNet and Arch agrees that if a bona fide Acquisition
Proposal is made to acquire shares of the other party to this Agreement, then
upon the request of the party not receiving the Acquisition Proposal, the party
receiving the Acquisition Proposal will cooperate with the other party to this
Agreement to make such filings and take such other actions as may be permitted
or required under the FCC's Policy Statement in Tender Offers and Proxy
Contests, in order to allow the parties to this Agreement to take all steps as
are necessary to consummate the transactions contemplated hereby pending FCC
approval of the transaction.

     6.7.  Access; Consultation.  Upon reasonable notice, and except as may be
prohibited by applicable Law, PageNet and Arch each shall (and shall cause its
Subsidiaries to) afford the other and its respective Representatives, reasonable
access, during normal business hours throughout the period prior to the
Effective Time, to its properties, books, contracts and records and, during such
period, each shall (and shall cause its Subsidiaries to) furnish promptly to the
other party all information concerning its business, properties and personnel as
may reasonably be requested; provided that no investigation pursuant to this
section shall affect or be deemed to modify any representation or warranty made
by PageNet or Arch under this Agreement; and provided, further, that the
foregoing shall not require PageNet or Arch to permit any inspection, or to
disclose any information, that in the reasonable judgment of PageNet or Arch, as
the case may be, would result in the disclosure of any trade secrets of it or
third parties, or violate any of its obligations with respect to confidentiality
if PageNet or Arch, as the case may be, shall have used all reasonable efforts
to obtain the consent of such third party to such inspection or disclosure. All
requests for information made pursuant to this section shall be directed to an
executive officer of PageNet or Arch, as the case may be, or such Person as may
be designated by any such executive officer, as the case may be.

     6.8.  Affiliates.  PageNet shall deliver to Arch a letter identifying all
Persons whom PageNet believes to be, at the date of its Stockholders Meeting,
affiliates of PageNet for purposes of Rule 145 under the Securities Act ("Rule
145 Affiliates"). PageNet shall use all reasonable efforts to cause each Person
who is identified as a Rule 145 Affiliate in the letter referred to above to
deliver to Arch on or prior to the date of such party's respective Stockholders
Meeting a written agreement, in the form attached as Exhibit C (the "PageNet
Affiliates Agreement"). Prior to the Effective Time, PageNet shall use all
reasonable efforts to cause each additional Person who is identified as a Rule
145 Affiliate after the date of its Stockholders Meeting to execute the
applicable written agreement as set forth in this Section 6.8, as soon as
practicable after such Person is identified.

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     6.9.  Stock Exchange Listing.  Arch shall use its reasonable best efforts
to file a notification for listing of additional shares with respect to the
shares of Arch Common Stock to be issued pursuant to the Merger, Arch Exchange
Offer and pursuant to the Certificate Amendments with the Nasdaq Stock Market
("NASDAQ") on or prior to the Closing Date.

     6.10.  Publicity.  The initial press release with respect to the Merger
shall be a joint press release. Thereafter PageNet and Arch shall consult with
each other prior to issuing any press releases or otherwise making public
announcements with respect to the Merger, the Exchange Offers and the other
transactions contemplated by this Agreement and prior to making any filings with
any third party and/or any Governmental Entity (including any securities
exchange) with respect thereto, except as may be required by Law or by
obligations pursuant to any listing agreement with, or rules of, any securities
exchange.

     6.11.  Benefits.

     (a) Stock Options.

          (i) At the Effective Time, each outstanding option to purchase PageNet
     Shares (a "PageNet Option") under PageNet Stock Plans, and which has not
     vested prior to the Effective Time, shall become fully exercisable and
     vested as of the Effective Time. At the Effective Time, each PageNet Option
     shall be converted to an option to acquire, on the same terms and
     conditions as were applicable under such PageNet Option, the same number of
     shares of Arch Common Stock as the holder of such PageNet Option would have
     been entitled to receive pursuant to the Merger had such holder exercised
     such PageNet Option in full immediately prior to the Effective Time
     (rounded down to the nearest whole number) (a "Substitute Option"), at an
     exercise price per share (rounded to the nearest whole cent) equal to: (y)
     the aggregate exercise price for PageNet Shares otherwise purchasable by
     such holder pursuant to such PageNet Option; divided by (z) the number of
     full shares of Arch Common Stock deemed purchasable pursuant to such
     PageNet Option in accordance with the foregoing.

          (ii) Notwithstanding the foregoing provisions, in the case of any
     option to which Code Section 421 applies, the option price, the number of
     shares subject to such option, and the terms and conditions of exercise of
     such option shall be determined in order to comply with Code Section
     424(a). As promptly as practicable after the Effective Time, Arch shall
     deliver to the participants in PageNet Stock Plans appropriate notices
     setting forth such participants' rights pursuant to the Substitute Options.

          (iii) With respect to each of the directors and officers of PageNet
     identified in Section 6.11(a)(iii) of the PageNet Disclosure Letter (each,
     a "Section 16 Person"), the full Board of Directors of PageNet shall
     approve the disposition by each such Section 16 Person of the PageNet
     equity securities (including derivative securities) set forth next to such
     Section 16 Person's name in Section 6.11(a)(iii) of the PageNet Disclosure
     Letter and the full Board of Directors of Arch shall approve the
     acquisition by each such Section 16 Person of the Arch equity securities
     (including derivative securities) set forth next to such Section 16
     Person's name in Section 6.11(a)(iii) of the PageNet Disclosure Letter.
     Each such approval shall specify, in the form set forth in Section
     6.11(a)(iii) of the PageNet Disclosure Letter, the material terms of the
     derivative securities and each such approval shall specify that the
     approval is granted for purposes of exempting the transaction under Rule
     16b-3 under the Exchange Act.

     (b) Conversion and Registration.  At or prior to the Effective Time,
PageNet shall make all necessary arrangements with respect to PageNet Stock
Plans to permit the conversion of the unexercised PageNet Options into
Substitute Options pursuant to this section and, as soon as practicable after
the Effective Time, Arch shall use its reasonable best efforts to register under
the Securities Act on Form S-8 or other appropriate form (and use its best
efforts to maintain the effectiveness thereof) shares of Arch Common Stock
issuable pursuant to all Substitute Options.

     (c) Amendment to 401(k) Plan.  Prior to the Effective Time, PageNet shall
(i) amend the PageNet Employees Savings Plan and the related trust to prohibit
the investment of Employer Salary Reduction
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Contributions in equity securities of PageNet (ii) deregister interests under
such plan and any registered but unsold equity securities of PageNet under the
Securities Act of 1933 and the Exchange Act.

     6.12.  Expenses.  Whether or not the Merger is consummated, all costs and
expenses incurred in connection with this Agreement, the Merger, the Exchange
Offers and the other transactions contemplated by this Agreement shall be paid
by the party incurring such cost and expense, except that costs and expenses
incurred in connection with the filing fee for the S-4 Registration Statement
and the Exchange Registration Statements, printing and mailing the
Prospectus/Proxy Statement, the S-4 Registration Statement and the Exchange
Registration Statements, and the filing fees under the HSR Act, any other
filings fees under any Governmental Regulations, and any filings fees in
connection with obtaining approvals under the Communications Act, FCC
Regulations and State Laws shall be shared equally by Arch and PageNet.

     6.13.  Indemnification; Directors' and Officers' Insurance.

     (a) For six years from and after the Effective Time, Arch will indemnify
and hold harmless each present and former director and officer of PageNet
(solely when acting in such capacity) determined as of the Effective Time (the
"Indemnified Parties"), against any costs or expenses (including reasonable
attorneys' fees), judgments, fines, losses, claims, damages or liabilities
(collectively, "Costs") incurred in connection with any claim, action, suit,
proceeding or investigation, whether civil, criminal, administrative or
investigative, arising out of or pertaining to matters existing or occurring at,
or prior to, the Effective Time, whether asserted or claimed prior to, at or
after the Effective Time, to the fullest extent that PageNet would have been
permitted under Delaware law and its certificate of incorporation or bylaws in
effect on the date of this Agreement to indemnify such Person (and the Surviving
Corporation shall also advance expenses as incurred to the fullest extent
permitted under applicable law, provided the Person to whom expenses are
advanced provides an undertaking to repay such advances if it is ultimately
determined that such Person is not entitled to indemnification).

     (b) Any Indemnified Party wishing to claim indemnification under paragraph
(a) of this Section 6.13 shall promptly notify Arch, upon learning of any such
claim, action, suit, proceeding or investigation, but the failure to so notify
shall not relieve Arch of any liability it may have to such Indemnified Party if
such failure does not materially prejudice the ability of Arch to defend such
claims. In the event of any such claim, action, suit, proceeding or
investigation (whether arising before or after the Effective Time), (i) Arch
shall have the right to assume the defense thereof and Arch shall not be liable
to such Indemnified Parties for any legal expenses of other counsel or any other
expenses subsequently incurred by such Indemnified Parties in connection with
the defense thereof, except that if Arch elects not to assume such defense or
counsel for the Indemnified Parties advises that there are actual conflicts of
interest between Arch and the Indemnified Parties, the Indemnified Parties may
retain counsel satisfactory to them, and Arch shall pay all reasonable fees and
expenses of such counsel for the Indemnified Parties promptly as statements
therefor are received; provided, however, that Arch shall be obligated pursuant
to this paragraph (b) to pay for only one firm of counsel for all Indemnified
Parties in any jurisdiction (unless there is such an actual conflict of
interest), (ii) the Indemnified Parties will cooperate in the defense of any
such matter and (iii) Arch shall not be liable for any settlement effected
without its prior written consent.

     (c) Arch shall maintain a policy of officers' and directors' liability
insurance for acts and omissions occurring prior to the Effective Time ("D&O
Insurance") with coverage in amount and scope at least as favorable as PageNet's
existing directors' and officers' liability insurance coverage for a period of
six years after the Effective Time; provided, however, if the existing D&O
Insurance expires, is terminated or canceled, or if the annual premium therefor
is increased to an amount in excess of 200% of the last annual premium paid
prior to the date of this Agreement (the "Current Premium"), in each case during
such six year period, Arch will use its best efforts to obtain D&O Insurance in
an amount and scope as great as can be obtained for the remainder of such period
for a premium not in excess (on an annualized basis) of 200% of the Current
Premium. The provisions of this Section 6.13(c) shall be deemed to have been
satisfied if prepaid policies shall have been obtained by PageNet prior to the
Closing, which policies

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provide such directors and officers with coverage for an aggregate period of six
years with respect to claims arising from facts or events that occurred on, or
prior to, the Effective Time, including, without limitation, with respect to the
transactions contemplated by this Agreement. If such prepaid policies shall have
been obtained by PageNet prior to the Closing, then Arch shall maintain such
policies in full force and effect and shall continue to honor PageNet's
obligations thereunder.

     (d) If Arch or any of its successors or assigns: (i) shall consolidate
with, or merge into, any other corporation or entity and shall not be the
continuing or surviving corporation or entity of such consolidation or merger;
or (ii) shall transfer all or substantially all of its properties and assets to
any individual, corporation or other entity, then and in each such case, proper
provisions shall be made so that the successors and assigns of Arch shall assume
all of the obligations set forth in this section. At the Effective Time, Arch
shall assume and be bound by all of PageNet's indemnity obligations with respect
to officers, directors and employees of corporations it previously acquired that
are identified in the corresponding section of the PageNet Disclosure Letter.

     (e) The provisions of this section are intended to be for the benefit of,
and shall be enforceable by, each of the Indemnified Parties, their heirs and
their representatives.

     6.14.  Takeover Statute.  If any Takeover Statute or similar statute or
regulation is or may become applicable to this Agreement or to the other
transactions contemplated hereby or thereby, each of the parties and its Board
of Directors shall grant such approvals and take all such actions as are legally
permissible so that the transactions contemplated under such agreements may be
consummated as promptly as practicable on the terms contemplated under such
agreements and otherwise act to eliminate or minimize the effects of any such
statute or regulation on the transactions contemplated under such agreements.

     6.15.  Confidentiality.  PageNet and Arch each acknowledges and confirms
that it has entered into a Confidentiality Agreement, dated as of August 26,
1999 (the "Confidentiality Agreement"), and that the Confidentiality Agreement
shall remain in full force and effect in accordance with its terms.

     6.16.  Tax-Free Reorganization.  Arch, Merger Sub and PageNet shall each
use its best efforts to cause the Merger to be treated as a reorganization
within the meaning of Section 368(a) of the Code and, with respect to PageNet,
to obtain an opinion of its counsel as contemplated by Section 7.3(d).

     6.17.  Senior Credit Facilities.  PageNet and Arch shall use their
reasonable best efforts to secure, through the amendment or restatement of their
respective current credit facilities, through a new credit facility or through
the operation of the Prepackaged Plan, or any combination of the foregoing,
senior secured debt financing in an amount not less than $1.3 billion on terms
reasonably acceptable to the parties to this Agreement. Simultaneously with the
Exchange Offers, PageNet shall solicit the consent of the holders of PageNet's
senior credit facilities (the "PageNet Secured Creditors") to the Prepackaged
Plan. The solicitation of the PageNet Secured Creditors shall be made in
accordance with the standards and requirements set forth in Section 6.18(e).

     6.18.  The Exchange Offers.

     (a) Provided that nothing shall have occurred that would result in a
failure to satisfy any other conditions set forth in Section 6.18(b) of this
Agreement, Arch and PageNet shall, as promptly as practicable, commence separate
exchange offers (the "Arch Exchange Offer" and the "PageNet Exchange Offer" and
together, the "Exchange Offers") to issue an aggregate of up to: (i) 29,651,984
shares of Arch Common Stock in exchange for the $448.4 million in aggregate
principal amount of Arch' 10 7/8% Senior Discount Notes due March 15, 2008
issued under and pursuant to an Indenture, dated as of March 12, 1996, between
Arch and IBJ Schroder Bank & Trust Company, as Trustee (the "Arch Notes"); and
(ii) in the case of PageNet, 616,830,757 PageNet Shares and, subject to Section
6.1(d) of this Agreement, Distributed Interests representing 68.9% of the equity
ownership in the Distributed Subsidiary in exchange for the $1.2 billion in
aggregate principal amount, together with all accrued interest thereon, of: (x)
10% Senior Subordinated Notes Due October 15, 2008 issued under and pursuant to
an Indenture, dated as of July 15, 1995, between PageNet and Shawmut Bank, N.A.,
as Trustee, as supplemented by a
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Second Supplemental Indenture, dated as of October 15, 1996, between PageNet and
Fleet National Bank; (y) 10.125% Senior Subordinated Notes Due August 1, 2007
issued under and pursuant to an Indenture, dated as of July 15, 1995, between
PageNet and Shawmut Bank, N.A., as Trustee, as supplemented by a First
Supplemental Indenture, dated as of July 15, 1995, between PageNet and Shawmut
Bank, N.A.; and (z) 8.875% Senior Subordinated Notes Due February 1, 2006 issued
under and pursuant to an Indenture, dated as of January 15, 1994, between
PageNet and Shawmut Bank, N.A., as Trustee, as supplemented by a First
Supplemental Indenture, dated as of January 15, 1994, between PageNet and
Shawmut Bank, N.A. (collectively, the "PageNet Notes" and together with the Arch
Notes, the "Notes"). In the Exchange Offers, (i) Arch will offer to exchange
66.1318 shares of Arch Common Stock for each $1,000 principal amount, together
with all accreted or accrued interest thereon, of outstanding Arch Notes and
(ii) PageNet will offer to exchange a pro rata portion of 616,830,757 PageNet
Shares and, subject to Section 6.1(d) of this Agreement, Distributed Interests
representing the portion of such equity ownership in the Distributed Subsidiary
equal to 68.9% of the total equity ownership of the Distributed Subsidiary for
each PageNet Note (such pro rata portion to be computed immediately prior to the
Effective Time by dividing the principal amount, together with all accrued
interest thereon, of each PageNet Note by the principal amount, together with
all accrued interest thereon, of all PageNet Notes). Calculations of share
amounts for such purpose will be rounded down to the nearest whole share and no
fractional shares of Arch Common Stock or PageNet Shares will be issued for
Notes.

     (b) The obligations of PageNet under the PageNet Exchange Offer shall be
subject to the satisfaction of the conditions to the consummation of the Merger
set forth in Article VII of this Agreement and shall be subject to the further
condition that not less than 97.5% of the aggregate outstanding principal amount
of PageNet Notes and not less than a majority of the outstanding principal
amount of each series of PageNet Notes shall have been validly tendered in
accordance with the terms of the PageNet Exchange Offer prior to the expiration
date of the PageNet Exchange Offer and not withdrawn (such 97.5% of the
outstanding principal amount of the PageNet Notes and not less than a majority
of the outstanding principal amount of each series of PageNet Notes tendered and
not withdrawn being herein referred to as the "PageNet Minimum Condition").
Except as otherwise provided in this Agreement, no term or condition of the
Exchange Offers may be amended or modified without the written consent of the
parties hereto, which consent shall not be unreasonably withheld.

     (c) Holders of Notes who tender into the Exchange Offers will be required,
as a condition to a valid tender, to give their consent (the "Note Consents")
with respect to all Notes tendered by them to, with respect to the PageNet
Notes, the Prepackaged Plan and, with respect to all Notes (including the Arch
Notes), the following amendments to the respective indenture or supplemental
indentures, together with such additional amendments thereto or waivers thereof
as shall be determined and consented to by each of Arch and PageNet to be
necessary or desirable (the "Indenture Amendments"): (i) amendment of each such
indenture to the extent necessary, if any, to permit the completion of the
Merger, the Prepackaged Plan and the other transactions contemplated by this
Agreement; and (ii) amendments to eliminate (A) any covenants which may be
modified or eliminated by majority vote of the Notes, including without
limitation any covenants which restrict (s) the sale of assets, (t) any change
of control, (u) the incurrence of indebtedness, (v) the making of restricted
payments, (w) the existence of limitations on distributions by subsidiaries, (x)
the existence of liens, (y) transactions with affiliates or related persons or
(z) the issuance and sale of stock of subsidiaries, (B) any events of default
which relate to (x) the non-payment or acceleration of other indebtedness (or
notification of foreclosure proceedings with respect to property secured by
other indebtedness), (y) the failure to discharge judgments for the payment of
money, or (z) the bankruptcy or insolvency of subsidiaries, and (C) any
provisions which condition mergers or consolidations on compliance with any
financial criteria. Such holders will also be required, as a condition to a
valid tender, to waive (the "Note Waivers") any and all existing defaults on or
with respect to the Notes and any and all rights to rescind their acceptance of
the Exchange Offer after the Exchange Offers Expiration Date (as defined in
Section 6.18(h) hereof), such waiver of rescission rights to be subject,
however, to their withdrawal rights under applicable law and regulations, or to
claim any payments relating to the Notes tendered under applicable law and
regulations, and for any other relief, legal or equitable,
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based on any possible future judicial, administrative or other governmental or
legal determination that the Note Consents or the adoption of any of the
Indenture Amendments are invalid or unenforceable. Notwithstanding anything to
the contrary herein, the Note Waivers shall not be deemed to cover claims for
violations of federal or state securities laws relating to the Exchange Offers.

     (d) PageNet and Arch each agrees, as to itself and its Subsidiaries, that
none of the information supplied or to be supplied by it or its Subsidiaries for
inclusion or incorporation by reference in: (i) (x) the Registration Statement
on Form S-4 to be filed with the SEC by Arch in connection with the issuance of
shares of Arch Common Stock in the Arch Exchange Offer (including the consent
solicitation and prospectus (the "Arch Exchange Prospectus" constituting a part
thereof) (the "Arch Exchange Registration Statement")) and (y) the Registration
Statement on Form S-4 to be filed with the SEC by PageNet in connection with the
issuance of PageNet Shares and Distributed Interests in the PageNet Exchange
Offer (including the consent solicitation and prospectus (the "PageNet Exchange
Prospectus" and, together with the Arch Exchange Statement, the "Exchange
Prospectuses" constituting a part thereof) (the "PageNet Exchange Registration
Statement" and, together with the Arch Exchange Registration Statement, the
"Exchange Registration Statements")) will, at the time the Exchange Registration
Statements become effective under the Securities Act; and (ii) the Exchange
Prospectuses and any amendment or supplement thereto will, at the date of
mailing to noteholders contain any untrue statement of a material fact or omit
to state any material fact required to be stated therein or necessary in order
to make the statements therein, in light of the circumstances under which they
were made, not misleading. If at any time prior to the Effective Time any
information relating to Arch or PageNet, or any of their respective affiliates
(as defined in SEC Rule 12b-2), officers or directors, is discovered by Arch or
PageNet which should be set forth in an amendment or supplement to any of the
Exchange Registration Statements or the Exchange Prospectuses, so that any of
such documents would not include any misstatement of a material fact or would
omit to state any material fact required to be stated therein or necessary to
make the statements therein, in the light of the circumstances under which they
were made, not misleading, the party which discovers such information shall
promptly notify the other parties to this Agreement and an appropriate amendment
or supplement describing such information shall be promptly filed with the SEC
and, to the extent required by law, disseminated to the noteholders.

     (e) The PageNet Exchange Prospectus sent to the holders of the PageNet
Notes in connection with the PageNet Exchange Offer will also constitute a
disclosure statement for the purpose of soliciting the acceptances of such
holders for the Prepackaged Plan (as defined in Section 6.19). PageNet and Arch
shall consult with each other prior to sending the PageNet Exchange Prospectus
to the holders of the PageNet Notes for purposes of ensuring that such materials
comply with the disclosure requirements of the Bankruptcy Code and other
applicable law insofar as they relate to prepackaged plans.

     (f) Arch and PageNet shall promptly prepare Exchange Prospectuses, and
shall prepare and file with the SEC the Exchange Registration Statements as
promptly as practicable. Arch and PageNet each shall use its reasonable best
efforts to have each of the Exchange Registration Statements declared effective
under the Securities Act as promptly as practicable and on the same day as the
S-4 Registration Statement, and promptly thereafter mail the Exchange
Prospectuses to the noteholders of Arch and PageNet. Each party shall notify the
other of the receipt of the comments of the SEC and of any requests by the SEC
for amendments or supplements to the Exchange Prospectuses or the Exchange
Registration Statements or for additional information and shall promptly supply
one another with copies of all correspondence between any of them (or their
Representatives) and the SEC (or its staff) with respect thereto. If, at any
time prior to the expiration date of the Exchange Offers, any event shall occur
relating to or affecting Arch, PageNet, or their respective officers or
directors, which event should be described in an amendment or supplement to the
Exchange Prospectuses or the Exchange Registration Statements, the parties shall
promptly inform one another and shall cooperate in promptly preparing, filing
and clearing with the SEC and, if required by applicable securities laws,
mailing to Arch' or PageNet's noteholders, as the case may be, such amendment or
supplement.

     (g) Provided the conditions to the Exchange Offers referred to in Section
6.18(b) above have been satisfied or waived and Arch or PageNet, as the case may
be, has accepted for exchange Notes properly
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tendered and not withdrawn, Notes that are not tendered into or accepted in the
Exchange Offers will remain outstanding as obligations of Arch or the Surviving
Corporation, as the case may be, after consummation of the Merger and Arch or
the Surviving Corporation, as the case may be, alone shall be obligated to
comply with the terms thereof, except as may otherwise be provided in the
Prepackaged Plan or the Final Confirmation Order (as defined in Section 6.19) if
the Bankruptcy Case (as defined in Section 6.19) is commenced. Such Notes shall
be modified only to the extent provided in the Indenture Amendments and the Note
Consents.

     (h) The Exchange Offers will expire at 12:00 midnight, New York City time,
on the thirty-fifth calendar day after such commencement, or, consistent with
this Agreement and the provisions of Section 6.19, at such later time and date
as PageNet and Arch shall select consistent with applicable law and regulations
(the "Exchange Offers Expiration Date").

     (i) The Arch Common Stock or PageNet Shares and Distributed Interests, as
the case may be, to be issued in exchange for the Notes tendered and accepted in
the Exchange Offers will be so issued only after timely receipt by the exchange
agent selected jointly by Arch and PageNet (the "Notes Exchange Agent") of: (i)
certificates for all physically delivered Notes in proper form for transfer, or
timely confirmation of book-entry transfer of such Notes for such purposes; (ii)
a properly completed and duly executed letter of transmittal in the form
provided on behalf of Arch or the Surviving Corporation, as the case may be, for
such purpose; (iii) a duly executed form of Note Consent and Note Waiver; and
(iv) any other documents required by the letter of transmittal.

     (j) For purposes of the Exchange Offers, Arch or PageNet, as the case may
be, shall be deemed to have accepted for exchange the tendered Notes as, if and
when Arch or PageNet, as the case may be, gives oral or written notice to the
Notes Exchange Agent of such party's acceptance of such Notes for exchange. Each
of Arch and PageNet agree to simultaneously accept for exchange the Notes
pursuant to their respective Exchange Offers. The Notes Exchange Agent will act
as agent for the tendering holders for the purpose of receiving the Notes and
transmitting the Arch Common Stock, PageNet Shares or Distributed Interests, as
the case may be, in exchange therefor.

     (k) Arch and PageNet shall jointly establish such additional procedures and
requirements with respect to the conduct of the Exchange Offers and shall cause
the same to be communicated to holders of the Notes in such manner as they shall
determine to be necessary or appropriate, including procedures and requirements
as may be necessary to obtain confirmation of the Prepackaged Plan if the
Bankruptcy Case is commenced. All questions concerning the timeliness, validity,
form, eligibility, and acceptance for exchange or withdrawal of any tender of
the Notes pursuant to any of the procedures described herein or any additional
procedures established by the parties shall be determined jointly by the
parties, whose determinations shall be final and binding. Arch and PageNet, as
the case may be, also reserve in connection with their respective Exchange
Offers, the absolute right to: (i) waive any defect or irregularity in any
tender with respect to any particular Note or any particular holder; (ii) permit
a defect or irregularity to be corrected within such time as it may determine;
or (iii) reject the purported tender of any Note and interest coupons
appertaining thereto. Tenders shall not be deemed to have been received or
accepted until all defects and irregularities have been cured or waived within
such time as Arch or PageNet, as the case may be, may determine in its sole
discretion. None of Arch, PageNet or the Notes Exchange Agent or any other
person shall be under any duty to give notification of any defects or
irregularities relating to tenders or incur any liability for failure to give
such notification.

     (l) Each of PageNet and Arch shall accept the Notes tendered in their
respective Exchange Offer as of immediately prior to the Effective Time.

     (m) Promptly upon receipt of the consents of the holders of at least a
majority of the outstanding principal amount of a series of Notes, Arch or
PageNet, as the case may be, shall execute the applicable supplemental indenture
to be effective as of the Effective Time.

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     6.19.  Bankruptcy Provisions.  As used in this Agreement, the term:

     "Bankruptcy Case" shall mean the bankruptcy case filed or stipulated to by
PageNet and its Subsidiaries under Chapter 11 of the Bankruptcy Code pursuant to
the terms hereof;

     "Bankruptcy Code" shall mean Title 11 of the United States Code, 11
U.S.C.sec.101 et seq., as now in effect or hereafter amended;

     "Bankruptcy Court" shall mean the court in which the Bankruptcy Case may be
filed or otherwise administered, including any court to which the Bankruptcy
Case may be transferred at any time under applicable law. PageNet and Arch
hereby agree that the U.S. Bankruptcy Court for the District of Delaware is the
appropriate venue for the Bankruptcy Case and that if the Bankruptcy Case is
filed by PageNet it will be filed in the District of Delaware;

     "Exit Financing" shall mean the senior secured debt financing referred to
in Section 6.17 hereof;

     "Final Confirmation Order" shall mean an order of the Bankruptcy Court
confirming the Prepackaged Plan in form and substance reasonably acceptable to
PageNet and Arch, which has not been amended, modified and added to without the
express consent of PageNet and Arch and as to which order as of the Effective
Time there is no stay or injunction;

     "Initial Determination Date" shall mean the date which is 35 calendar days
after the date upon which the S-4 Registration Statement and the PageNet
Exchange Registration Statement are declared effective by the SEC;

     "Interim Financing" shall mean debt financing in an amount and on terms
reasonably acceptable to Arch and appropriate to permit PageNet to continue its
business and operations in the ordinary course following the filing of the
Bankruptcy Case;

     "Prepackaged Plan" shall mean the "prepackaged" plan of reorganization for
PageNet and its Subsidiaries that (1) is prepared by PageNet and its
Subsidiaries in accordance with, and intended by PageNet and its Subsidiaries to
be confirmed under, the provisions of Chapter 11 of the Bankruptcy Code
(including the confirmation requirements set forth in Section 1129 thereof), (2)
consists of terms, conditions and provisions that are mutually acceptable to
Arch and PageNet (it being understood and agreed by PageNet and Arch that
neither party will unreasonably withhold its consent to proposed amendments to
non-material provisions of the Prepackaged Plan) and are not inconsistent with
the terms, conditions and provisions of this Agreement, (3) is included in the
SEC disclosure materials sent to holders of the PageNet Notes in connection with
the Exchange Offers pursuant to Sections 6.18(a) and (e) of this Agreement and
(4) which contains terms intended to implement this Agreement and other terms
which are not inconsistent with this Agreement, together with any and all
changes, amendments or modifications to, or restatements of, such prepackaged
plan which with respect to material provisions have been agreed to by Arch and
PageNet, without regard to whether such changes, amendments, modifications and
restatements are made to the Prepackaged Plan before or after the commencement
of the Bankruptcy Case;

     "PageNet Conditions to the Prepackaged Plan" shall mean (i) the Requisite
Bankruptcy Vote of the PageNet Notes, (ii) the Requisite Bankruptcy Vote of the
PageNet Secured Creditors and (iii) the Interim Financing;

     "Requisite Bankruptcy Vote of the PageNet Notes" shall mean a vote in favor
of the Prepackaged Plan by the holders of at least two-thirds of the outstanding
principal amount of the PageNet Notes that are actually voted, and a vote in
favor of the Prepackaged Plan by a majority in number of the holders of the
PageNet Notes that actually vote;

     "Requisite Bankruptcy Vote of the PageNet Secured Creditors" shall mean a
vote in favor of the Prepackaged Plan by the holders of at least two-thirds of
the outstanding indebtedness owed under the PageNet senior credit facilities
that are actually voted, and a vote in favor of the Prepackaged Plan by a

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<PAGE>   257

majority in number of the holders of the indebtedness under the PageNet senior
credit facilities that actually vote;

     "Requisite Conditions to the Prepackaged Plan" shall mean (i) the PageNet
Conditions to the Prepackaged Plan, (ii) the Arch Stockholders Approval, and
(iii) that either the Exit Financing has been obtained or upon entry of the
Final Order will be obtained.

     (a) Notwithstanding any other provision of this Agreement to the contrary,
in the event that:

          (i) prior to or at the Initial Determination Date the PageNet Minimum
     Condition is satisfied, and the PageNet Stockholders Approval and the Arch
     Stockholders Approvals are obtained, then the Exchange Offers shall be
     consummated pursuant to the terms hereof, the Bankruptcy Case shall not be
     filed and the Prepackaged Plan shall be abandoned, unless PageNet and Arch
     agree that the filing of the Bankruptcy Case and the confirmation of the
     Prepackaged Plan are in the best interests of PageNet and Arch,
     notwithstanding satisfaction of the PageNet Minimum Condition;

          (ii) at the Initial Determination Date, the PageNet Minimum Condition
     is not satisfied or the PageNet Stockholders Approval is not obtained but
     the Requisite Conditions to the Prepackaged Plan are satisfied, then either
     (x) (1) PageNet shall file the Bankruptcy Case (in the U.S. Bankruptcy
     Court for the District of Delaware or such other bankruptcy court as
     PageNet and Arch mutually agree) and seek confirmation of the Prepackaged
     Plan by the Bankruptcy Court, and (2) Arch shall be bound by all of the
     terms hereof, and shall consummate the Merger through the Prepackaged Plan
     if such plan is confirmed by the Bankruptcy Court by a Final Confirmation
     Order within 120 days of the commencement of the Bankruptcy Case, or such
     later date as is mutually agreed to in writing by Arch and PageNet, and if
     the other conditions to the Merger set forth in Article VII hereof (other
     than Section 7.1(a)(2) and 7.1(g)(ii), which shall have been satisfied by
     entry of the Final Confirmation Order) are satisfied after entry of the
     Final Confirmation Order but prior to the Termination Date, as such date
     may be extended in accordance with Section 8.2, or (y) PageNet shall
     terminate this Agreement and simultaneously pay to Arch the Arch
     Termination Fee pursuant to Section 8.5(c) hereof. In the event the
     Bankruptcy Case is commenced, Arch shall:

             (w) support assumption of this Agreement by PageNet as a
        debtor-in-possession pursuant to 11 U.S.C. sec.365;

             (x) enter into a new agreement identical to the terms of this
        Agreement with PageNet as a debtor-in-possession after commencement of
        the Bankruptcy Case, in the event PageNet and Arch agree (upon the
        advice of counsel) or the Bankruptcy Court determines that applicable
        law prohibits assumption of this Agreement by PageNet as a
        debtor-in-possession pursuant to 11 U.S.C. sec.365(c)(2);

             (y) support confirmation of the Prepackaged Plan and all actions
        and pleadings reasonably undertaken by PageNet in the Bankruptcy Case to
        achieve confirmation thereof; and

             (z) oppose any effort by any party to (1) dismiss the Bankruptcy
        Case or convert the Bankruptcy Case to a case under chapter 7 of the
        Bankruptcy Code, or (2) defeat confirmation of the Prepackaged Plan;

          (iii) at the Initial Determination Date, the PageNet Minimum Condition
     is not satisfied or the PageNet Stockholders Approval is not obtained and
     the Requisite Conditions to the Prepackaged Plan are not satisfied, then
     the Initial Determination Date shall be extended to the earlier of (x) the
     date upon which the PageNet Minimum Condition is satisfied, and the PageNet
     Stockholders Approval and the Arch Stockholders Approval are obtained, (y)
     the date upon which the Requisite Conditions to the Prepackaged Plan are
     satisfied and (z) September 30, 2000 (the "Extended Determination Date").
     If the PageNet Minimum Condition is satisfied and the PageNet Stockholders
     Approval and the Arch Stockholders Approval are obtained prior to September
     30, 2000, then the provisions of Section 6.19(a)(i) of this Agreement shall
     apply. If the Requisite Conditions to the Prepackaged

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<PAGE>   258

     Plan are satisfied prior to September 30, 2000, then the provisions of
     Section 6.19(a)(ii) of this Agreement shall apply;

          (iv) at any time after the date of this Agreement, the Board of
     Directors of PageNet determines that the filing of the Bankruptcy Case is
     in the best interests of PageNet, then (1) PageNet may file the Bankruptcy
     Case and shall seek, to the extent not already satisfied, to satisfy the
     PageNet Conditions to the Prepackaged Plan and otherwise seek confirmation
     of the Prepackaged Plan by the Bankruptcy Court, and (2) Arch shall (x)
     seek, to the extent not already satisfied, to satisfy the Arch Stockholders
     Approval and (y) be bound by all of the terms hereof, and shall consummate
     the Merger through the Prepackaged Plan if such plan is confirmed by the
     Bankruptcy Court by a Final Confirmation Order (provided that such Final
     Confirmation Order shall be entered by no later than December 31, 2000, or
     such later date as is mutually agreed to by Arch and PageNet) and if the
     other conditions to the Merger set forth in Article VII hereof (other than
     Section 7.1(a)(2) and 7.1(g)(ii), which shall have been satisfied by entry
     of the Final Confirmation Order) are satisfied after entry of the Final
     Confirmation Order but prior to the Termination Date, as such date may be
     extended in accordance with Section 8.2;

          (v) an Involuntary Insolvency Event occurs prior to a voluntary
     commencement of the Bankruptcy Case pursuant to Sections 6.19(a)(ii), (iii)
     or (iv), (1) (A) if the date of the Insolvency Event (the "Involuntary
     Insolvency Event Date") is prior to the Initial Determination Date, PageNet
     shall have up to 120 days after such Involuntary Insolvency Event Date to
     obtain from the appropriate court an order which dismisses such Involuntary
     Insolvency Event (including, with respect to an involuntary petition filed
     in any bankruptcy court, an order which holds or requires that the court
     abstain from adjudicating the petition pursuant to 11 U.S.C. sec.305) and
     which order is not subject to a stay or injunction and is not subject to an
     appeal and all periods for taking an appeal shall have expired (the
     "Dismissal Order"), so that the Exchange Offers may be completed, and this
     Agreement shall remain in full force and effect and Arch shall be bound by
     all of the terms hereof or (B) if an Involuntary Insolvency Event occurs
     after the Initial Determination Date, and as of the Involuntary Insolvency
     Event Date the PageNet Minimum Condition has been satisfied and the PageNet
     Stockholders Approval and Arch Stockholders Approval have been obtained,
     then (x) PageNet shall have up to 120 days after such Involuntary
     Insolvency Event Date to obtain entry of the Dismissal Order, and (y) this
     Agreement shall remain in full force and effect and Arch shall consummate
     the Merger (outside of bankruptcy, unless PageNet and Arch mutually consent
     to file the Bankruptcy Case as contemplated by Section 6.19(a)(i) hereof)
     pursuant to the terms hereof provided that such Dismissal Order has been
     obtained before the expiration of such 120-day period, (2) if on the
     Involuntary Insolvency Event Date the PageNet Minimum Condition has not
     been satisfied or PageNet Stockholders Approval has not been obtained but
     the Requisite Conditions to the Prepackaged Plan have been satisfied, then
     PageNet shall stipulate to bankruptcy relief under Chapter 11 of the
     Bankruptcy Code and the provisions of Section 6.19(a)(ii)(x)(1) of this
     Agreement shall apply (including the provisions therein requiring Arch to
     be obligated to consummate the Merger pursuant to the Prepackaged Plan);
     and (3) if on the Involuntary Insolvency Event Date the PageNet Minimum
     Condition has not been satisfied or PageNet Stockholders Approval or Arch
     Stockholders Approval has not been obtained and the Requisite Conditions to
     the Prepackaged Bankruptcy have not been obtained, then PageNet may (but
     shall not be obligated to) stipulate to bankruptcy relief under Chapter 11
     of the Bankruptcy Code and the provisions of Section 6.19(a)(iv) of this
     Agreement shall apply (including the provisions therein requiring Arch to
     be obligated for a period of time to consummate the Merger pursuant to the
     Prepackaged Plan). For purposes hereof, an "Involuntary Insolvency Event"
     shall mean any filing of an involuntary bankruptcy petition against PageNet
     or any of its Subsidiaries by any party, or the appointment under other
     applicable state or federal law of a liquidator or a trustee for PageNet or
     any of its Subsidiaries.

     (b) As soon as practicable after entering into this Agreement, PageNet and
Arch shall jointly prepare the Prepackaged Plan in form and substance
satisfactory to PageNet and Arch. PageNet shall include the Prepackaged Plan and
related solicitation materials (including a ballot) in the PageNet Exchange

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<PAGE>   259

Prospectus, the solicitation materials sent to the PageNet Secured Creditors,
and (to the extent PageNet and Arch deem necessary) in any materials sent to the
holders of PageNet Shares. PageNet and Arch shall cooperate to ensure that the
Exchange Offers, including the disclosures to holders of PageNet Notes made in
connection therewith, and the solicitation of PageNet Secured Creditors comply
with the disclosure requirements of the Bankruptcy Code and applicable law. The
Prepackaged Plan may not be amended, modified or added to in any material
respect without the written consent of PageNet and Arch.

     (c) Notwithstanding any other provision hereof to the contrary, (i) the
filing of the Bankruptcy Case, the operation of PageNet's business in accordance
with the Bankruptcy Code or the pendency of the Bankruptcy Case, or (ii) the
occurrence of an Involuntary Insolvency Event with respect to PageNet shall not
be considered in and of itself a Material Adverse Effect for purposes of this
Agreement.

     (d) On the same day that the Bankruptcy Case is filed, an order for relief
is consented to under Section 6.19(a)(v) of this Agreement or an order for
relief is entered, as applicable, PageNet shall file a motion (the "Initial
Merger Motion") for expedited determination of approval of Section 6.2 hereof
concerning Acquisition Proposals (the "Exclusivity Provision"), Section 8.5(c)
concerning the Arch Termination Fee and Section 8.5(b) concerning the PageNet
Termination Fee in form and substance acceptable to Arch, PageNet shall use its
best efforts to obtain an order approving the Initial Merger Motion (the
"Initial Merger Order") within 15 days of the commencement of the Bankruptcy
Case, but in no event not later than 30 days after the commencement thereof,
which order shall be in form and substance acceptable to Arch.

     (e) PageNet shall promptly provide to Arch with drafts of all documents,
motions, orders, filings or pleadings that PageNet proposes to file with the
Bankruptcy Court and will provide Arch with reasonable opportunity prior to the
filing thereof to review such filings to the extent reasonably practicable.
PageNet shall consult and cooperate with Arch with respect to all such filings.

     (f) PageNet and Arch shall use their best efforts to cause the transactions
contemplated by this Agreement and the Prepackaged Plan to be consummated in
accordance with the terms hereof and thereof, and without limiting the
generality of the foregoing shall use their best efforts to obtain all necessary
approvals, waivers, consents, permits, licenses, registrations and other
authorizations required in connection with this Agreement and the Prepackaged
Plan and the transactions contemplated hereby and thereby, including without
limitation, entry of the Final Confirmation Order.

     (g) PageNet shall cause its Subsidiaries to take all actions and to execute
all agreements and documents which are necessary or useful in the preparation of
and commencement of the Bankruptcy Case, the preparation, filing and prosecution
of the Prepackaged Plan and the entry of the Final Confirmation Order.

     (h) Concurrent with the commencement of the Exchange Offers, PageNet shall
send solicitation and disclosure materials to its creditors as would bind such
creditors to the Prepackaged Plan under the provisions of the Bankruptcy Code.
PageNet shall make such solicitations of its creditors (in addition to
solicitations of holders of the PageNet Notes) as PageNet and Arch determine is
necessary to facilitate and expedite the confirmation of the Prepackaged Plan in
the event of any potential Bankruptcy Case.

     (i) If the Bankruptcy Case is commenced pursuant to Section 6.19(a)(iv) or
(v), then Arch shall not be subject to the restrictions set forth in Section 6.2
or the restrictions on the conduct of its business set forth in Section
6.1(b)(viii) with respect to merger or acquisition transactions or the other
restrictions set forth in Section 6.1(b), to the extent such restrictions would
impede or prohibit Arch from entering into another merger or acquisition
transaction; provided, however, that Arch may not enter into another merger or
acquisition transaction that would prevent, materially impair or materially
delay its ability to consummate the Merger or the other transactions
contemplated hereby; provided, further, that if Arch enters into a merger or
acquisition transaction following the commencement of the Bankruptcy Case
pursuant to Section 6.19(a)(iv) or (v) and as a result of such event PageNet is
required to amend its disclosure statement and resolicit the votes of its
creditors, then the time within which the Final Confirmation Order must be
obtained shall be extended for an additional 90 days.

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<PAGE>   260

     6.20.  Rights Agreement.  At or prior to the Effective Time, the Arch Board
of Directors shall take all action required to render inapplicable the Arch
Rights Agreement to the Merger and the transactions contemplated by this
Agreement. At or prior to the Effective Time, the Arch Board of Directors shall
take all action required by Section 5.1(j)(ii) of this Agreement and the PageNet
Board of Directors shall take all action required by Section 5.1(j)(i) of this
Agreement.

     6.21.  Payment of Dissenters' Rights.  Following the Effective Time, any
payment made with respect to a holder of Dissenting Shares entitled to payment
under the DGCL will be made solely from the assets of the Surviving Corporation.
Arch shall not make any payments to holders of Dissenting Shares and shall not
directly or indirectly reimburse the Surviving Corporation for the payments made
with respect to Dissenting Shares.

     6.22.  Distribution of Interests in Vast to PageNet Shareholders.  Prior to
the Closing, the Board of Directors of PageNet will set aside for distribution,
solely to those holders of PageNet Shares immediately prior to the acceptance of
PageNet Notes in the PageNet Exchange Offer (the "Vast Distribution Record
Date"), with respect to each PageNet Share issued and outstanding at such date,
interests (the "Distributed Interests") representing the portion of such equity
ownership in Vast Solutions, Inc. (the "Distributed Subsidiary") equal to (x)
subject to Section 6.1(d), up to 20.0% of the total equity ownership of the
Distributed Subsidiary divided by (y) the number of PageNet Shares issued and
outstanding at the Vast Distribution Record Date (the distribution of the
Distributed Interests shall be referred to herein as the "Vast Distribution").
The distribution of the Distributed Interests shall be conditioned upon the
occurrence of (i) either (A) the satisfaction of the PageNet Minimum Condition
and the acceptance of the PageNet Notes or (B) the filing of the Final
Confirmation Order and (ii) the consummation of the Merger. PageNet and the
Distributed Subsidiary shall take such action reasonably necessary (including
filings with and no-action requests of the SEC and communications with
stockholders) to effectuate the Vast Distribution. Upon satisfaction of the
conditions to the Vast Distribution, Arch shall, in accordance with Section 4.2
of this Agreement and in connection with the exchange of PageNet certificates,
use its reasonable best efforts to consummate, or cause to be consummated the
Vast Distribution as promptly as practicable after the Effective Time."

                                  ARTICLE VII.

                                   CONDITIONS

     7.1.  Conditions to Each Party's Obligation to Effect the Merger.  The
respective obligation of each party to effect the Merger is subject to the
satisfaction or waiver, if applicable, at or prior to the Effective Time of each
of the following conditions:

          (a) Stockholder Approval.  The Arch Stockholders Approval shall have
     been obtained, and PageNet shall have obtained either (1) the PageNet
     Stockholders Approval or (2) entry of the Final Confirmation Order
     confirming the Prepackaged Plan, such that this Agreement and the
     transactions contemplated hereby can be accomplished without the approval
     of the holders of the PageNet Shares.

          (b) NASDAQ Listing.  The notification for listing of additional shares
     with respect to all shares of Arch Common Stock issuable pursuant to this
     Agreement shall have been filed with NASDAQ.

          (c) Governmental Regulations.  The waiting period applicable to the
     consummation of the Merger under the HSR Act shall have expired or been
     terminated, and all other consents, permits, licenses, and approvals for
     the Merger and the other transactions contemplated by this Agreement
     required by the Governmental Regulations, as well as all other material
     PageNet Required Consents and Arch Required Consents, shall have been
     obtained and shall have become Final Orders. For purposes of this
     agreement, a "Final Order" shall mean an action taken or order issued by
     the applicable Governmental Entity as to which (i) no request for stay by
     such Governmental Entity of the action or order is pending, no such stay is
     in effect, and, if any deadline for filing any such request is designated
     by statute or regulation, it is passed; (ii) no petition for rehearing or
     reconsideration of the action or order is pending before the Governmental
     Entity and the time for filing any such
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     petition is passed; (iii) the Governmental Entity does not have the action
     or order under reconsideration on its own motion and the time for such
     reconsideration has passed; (iv) the action or order is not then under
     active judicial review, there is no notice of appeal or other application
     for judicial review pending, and the deadline for filing such notice of
     appeal or other application for judicial review has passed; and (v) with
     respect to an action taken or order issued by the Governmental Entity
     granting consent to the Merger, such consent shall be without material
     adverse conditions, other than conditions that have been agreed to by
     PageNet and Arch or that are routine conditions with respect to transfer of
     this nature.

          (d) Laws and Orders.  No Governmental Entity of competent jurisdiction
     shall have enacted, issued, promulgated, enforced or entered any Law
     (whether temporary, preliminary or permanent) that is in effect and
     restrains, enjoins or otherwise prohibits consummation of the Merger, the
     PageNet Exchange Offer, the Vast Distribution or the other transactions
     contemplated by this Agreement (collectively, an "Order"), and no
     Governmental Entity shall have instituted any proceeding or threatened to
     institute any proceeding seeking any such Order.

          (e) S-4.  The S-4 Registration Statement and the PageNet Exchange
     Registration Statement shall have become effective under the Securities
     Act. No stop order suspending the effectiveness of the S-4 Registration
     Statement or the PageNet Exchange Registration Statement shall have been
     issued, and no proceedings for that purpose shall have been initiated or be
     threatened by the SEC.

          (f) Senior Credit Facilities.  Arch and its subsidiaries, including
     PageNet after giving effect to the Merger, will have senior credit
     facilities in an amount not less than $1.3 billion.

          (g) Exchange Offers/Bankruptcy.  Either (i) the PageNet Minimum
     Condition shall have been satisfied or (ii) if the PageNet Minimum
     Condition has not been satisfied, the Final Confirmation Order shall have
     been entered confirming the Prepackaged Plan and all conditions to the
     Effective Time occurring under the Prepackaged Plan shall have been
     satisfied.

          (h) Blue Sky Approvals.  Arch shall have received all state securities
     and "blue sky" permits and approvals necessary to consummate the
     transactions contemplated by this Agreement.

          (i) Expected Out-of-Pocket Income Tax Liability.  PageNet, Arch,
     Merger Sub and their respective subsidiaries shall not be reasonably
     expected to incur out-of-pocket income tax liability in their respective
     taxable periods which include the Effective Time resulting directly from
     the consummation of the Merger, the Exchange Offers and the Vast
     Distribution in excess of $25 million in the aggregate. In making this
     determination the following shall be taken into account: (1) the amount of
     cancellation of indebtedness income, if any, includible in gross income,
     (2) gain, if any, incurred as a result of the distribution or transfer of
     appreciated assets, and (3) the amount of losses, credits or deductions,
     including both available net operating loss or credit carryforwards and
     losses, deductions or credits expected to be generated in the taxable
     periods which include the Effective Time, but excluding any expected
     carrybacks from subsequent taxable periods.

     7.2.  Conditions to Obligations of Arch and Merger Sub.  The obligations of
Arch and Merger Sub to effect the Merger are also subject to the satisfaction or
waiver by Arch at or prior to the Effective Time of the following conditions:

          (a) Representations and Warranties.  The representations and
     warranties of PageNet set forth in this Agreement (other than those
     representations and warranties which would be breached as a result of the
     filing or conduct of the Bankruptcy Case or the occurrence of an
     Involuntary Insolvency Event with respect to PageNet): (i) to the extent
     qualified by materiality, shall be true and correct; and (ii) to the extent
     not qualified by materiality, shall be true and correct (except that this
     clause (ii) shall be deemed satisfied so long as any failures of such
     representations and warranties to be true and correct, taken together,
     would not reasonably be expected to have a Material Adverse Effect on
     PageNet and would not reasonably be expected to have a material adverse
     effect on the expected benefits of the Merger to Arch), in the case of each
     of clauses (i) and (ii), as of the date of this Agreement and (except to
     the extent such representations and warranties speak as of an earlier date)

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     as of the Closing Date as though made on and as of the Closing Date, and
     Arch shall have received a certificate signed on behalf of PageNet by an
     executive officer of PageNet to such effect.

          (b) Performance of Obligations of PageNet.  PageNet shall have
     performed in all material respects all of its covenants, agreements and
     obligations set forth in this Agreement at or prior to the Closing Date,
     and Arch shall have received a certificate signed on behalf of PageNet by
     an executive officer of PageNet to such effect.

          (c) Consents Under Agreements.  PageNet shall have obtained the
     consent or approval of each Person whose consent or approval shall be
     required in order to consummate the transactions contemplated by this
     Agreement under any Contract to which PageNet or any of its Subsidiaries is
     a party (other than consents or waivers relating to the Bankruptcy Case or
     the occurrence of an Involuntary Insolvency Event), except those for which
     the failure to obtain such consent or approval, individually or in the
     aggregate, is not reasonably likely to have, a Material Adverse Effect on
     PageNet or a material adverse effect on the expected benefits of the Merger
     to Arch.

          (d) Intentionally Omitted.

          (e) Certificate.  PageNet shall have delivered to Arch a certificate
     (without qualification as to knowledge or materiality or otherwise) to the
     effect that each of the conditions specified in Section 7.2 is satisfied in
     all respects, that the PageNet Stockholders Meeting has been convened
     (unless the Bankruptcy Case precedes the scheduled date of such meeting),
     and that the actions set forth in Section 6.5(a) of this Agreement have
     been adopted and approved in accordance with such section (except to the
     extent such approval is not required by reason of the entry of the Final
     Confirmation Order).

     7.3.  Conditions to Obligation of PageNet.  The obligation of PageNet to
effect the Merger is also subject to the satisfaction or waiver by PageNet at or
prior to the Effective Time of the following conditions:

          (a) Representations and Warranties.  The representations and
     warranties of Arch and Merger Sub set forth in this Agreement: (i) to the
     extent qualified by materiality, shall be true and correct; and (ii) to the
     extent not qualified by materiality, shall be true and correct (except that
     this clause (ii) shall be deemed satisfied so long as any failures of such
     representations and warranties to be true and correct, taken together,
     would not reasonably be expected to have a Material Adverse Effect and
     would not reasonably be expected to have a material adverse effect on the
     expected benefits of the Merger to PageNet), in the case of each of clauses
     (i) and (ii), as of the date of this Agreement and (except to the extent
     such representations and warranties speak as of an earlier date) as of the
     Closing Date as though made on and as of the Closing Date, and PageNet
     shall have received a certificate signed on behalf of Arch and Merger Sub
     by an executive officer of Arch to such effect.

          (b) Performance of Obligations of Arch.  Each of Arch and Merger Sub
     shall have performed in all material respects all of its covenants,
     agreements and obligations set forth in this Agreement at or prior to the
     Closing Date, and PageNet shall have received a certificate signed on
     behalf of Arch and Merger Sub by an executive officer of Arch to such
     effect.

          (c) Consents Under Agreements.  Arch shall have obtained the consent
     or approval of each Person whose consent or approval shall be required in
     order to consummate the transactions contemplated by this Agreement under
     any Contract to which Arch or any of its Subsidiaries is a party, except
     those for which the failure to obtain such consent or approval,
     individually or in the aggregate, is not reasonably likely to have, a
     Material Adverse Effect on Arch or a material adverse effect on the
     expected benefits of the Merger to PageNet.

          (d) Tax Opinion.  PageNet shall have received the opinion of Mayer,
     Brown & Platt, counsel to PageNet, dated the Closing Date, to the effect
     that the Merger will be treated for federal income tax purposes as a
     reorganization within the meaning of Section 368(a) of the Code, and that
     each of Arch, Merger Sub and PageNet will be a party to that reorganization
     within the meaning of Section 368(b) of the Code. Such opinion shall be
     based on certain assumptions concerning the fair market value of stock and
     securities to be surrendered and issued in the Merger, the Exchange Offers
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     and the Vast Distribution, which PageNet, Arch and, with respect to
     PageNet, Houlihan Lokey Howard & Zukin Financial Advisors, Inc., and, with
     respect to Arch, Bear, Stearns & Co. Inc. will certify as being reasonable.
     In addition, in rendering such opinions, counsel may rely upon
     representations and certificates given for this purpose by responsible
     officers of PageNet and Arch.

          (e) Certificate.  Arch shall have delivered to PageNet a certificate
     (without qualification as to knowledge or materiality or otherwise) to the
     effect that each of the conditions specified in Section 7.3 (a)-(d) is
     satisfied in all respects, that the Arch Stockholders Meeting has been
     convened, and that the actions set forth in Section 6.5(b) have been
     adopted and approved in accordance with such section.

          (f) [Intentionally Omitted]

          (g) Vast Distribution.  The Board of Directors of PageNet shall have
     set aside Distributed Interests pursuant to Section 6.22 of this Agreement
     or the Final Confirmation Order shall have been entered confirming the
     Prepackaged Plan.

                                 ARTICLE VIII.

                                  TERMINATION

     8.1.  Termination by Mutual Consent.  This Agreement may be terminated and
the Merger may be abandoned at any time prior to the Effective Time, whether
before or after the approval by stockholders of PageNet or Arch referred to in
Section 7.1(a), by mutual written consent of PageNet and Arch, through action of
their respective Boards of Directors.

     8.2.  Termination by Either Arch or PageNet.  This Agreement may be
terminated and the Merger may be abandoned at any time prior to the Effective
Time by action of the Board of Directors of either Arch or PageNet if: (i) the
Merger shall not have been consummated by September 30, 2000 if no Bankruptcy
Case has been filed by that date or 30 days following the date by which the
Final Confirmation Order must be entered under Section 6.19(a) (the "Termination
Date"); provided, however, that either party shall have the option, in its sole
discretion, to extend the Termination Date for an additional period of time not
to exceed 90 days if the sole reason that the Merger has not been consummated by
such date is that the condition set forth in Section 7.1(c) has not been
satisfied due to the failure to obtain the necessary consents and approvals
under applicable Governmental Regulations and Arch or PageNet are still
attempting to obtain such necessary consents and approvals under applicable
Governmental Regulations or are contesting the refusal of the relevant
Government Entities to give such consents or approvals in court or through other
applicable proceedings; (ii) the PageNet Stockholders Meeting and the Arch
Stockholders Meeting shall have been held and completed, but the PageNet
Stockholders Approval or the Arch Stockholders Approval, to the extent required
by Section 7.1(a), shall not have occurred; or (iii) any Order permanently
restraining, enjoining or otherwise prohibiting consummation of the Merger shall
become final and non-appealable (whether before or after the PageNet
Stockholders Approval or the Arch Stockholders Approval); provided, further,
that the right to terminate this Agreement pursuant to clause (i) above shall
not be available to any party that has breached in any material respect its
obligations under this Agreement in any manner that shall have proximately
contributed to the failure of the Merger to be consummated.

     8.3.  Termination by PageNet.  This Agreement may be terminated and the
Merger may be abandoned at any time prior to the Effective Time, before or after
the PageNet Stockholder Approval referred to in Section 7.1(a), by action of the
Board of Directors of PageNet if:

          (a) the Board of Directors of Arch shall have withdrawn or adversely
     modified its approval or recommendation of this Agreement;

          (b) there has been a breach by Arch or Merger Sub of any
     representation, warranty, covenant or agreement contained in this Agreement
     which both: (i) would result in a failure of a condition set forth in
     Section 7.3(a) or 7.3(b); and (ii) cannot be or is not cured prior to the
     Termination Date;

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<PAGE>   264

          (c) PageNet has received a Superior Proposal, has otherwise complied
     with the requirements of Section 6.2, provides Arch with all of the
     material terms of Superior Proposal at least two business days prior to
     termination and simultaneously with such termination pays to Arch the Arch
     Termination Fee required by Section 8.5(c); or

          (d) pursuant to Section 6.19(a)(ii), PageNet shall not file the
     Bankruptcy Case and seek confirmation of the Prepackaged Plan by the
     Bankruptcy Court and simultaneously pays to Arch the Arch Termination Fee.

     8.4.  Termination by Arch.  This Agreement may be terminated and the Merger
may be abandoned at any time prior to the Effective Time, before or after the
Arch Stockholder Approval referred to in Section 7.1(a), by action of the Board
of Directors of Arch if:

          (a) the Board of Directors of PageNet shall have withdrawn or
     adversely modified its approval or recommendation of this Agreement to do
     so;

          (b) there has been a breach by PageNet of any representation,
     warranty, covenant or agreement contained in this Agreement which both: (i)
     would result in a failure of a condition set forth in Section 7.2(a) or
     7.2(b); and (ii) cannot be or is not cured prior to the Termination Date,
     other than a breach that results solely from the filing or conduct of the
     Bankruptcy Case consistent with the terms of this Agreement or solely from
     the occurrence of an Involuntary Insolvency Event with respect to PageNet;

          (c) the Initial Merger Order has not been entered within 30 days of
     the commencement of the Bankruptcy Case;

          (d) the Final Confirmation Order is not entered within the time
     permitted by Section 6.19(a);

          (e) the Prepackaged Plan is amended, modified or added to in violation
     of Section 6.19(b); or

          (f) Arch has received a Superior Proposal, has otherwise complied with
     the requirements of Section 6.2, provides PageNet with all of the material
     terms of the Superior Proposal at least two business days prior to such
     termination and simultaneously pays to PageNet the PageNet Termination Fee
     required by Section 8.5(b).

     8.5.  Effect of Termination and Abandonment.

          (a) In the event of termination of this Agreement and the abandonment
     of the Merger pursuant to this Article VIII, this Agreement (other than as
     set forth in Section 9.1) shall become void and of no effect with no
     liability (other than as set forth in Section 8.5(b) or (c), or in the
     proviso at the end of this sentence) on the part of any party to this
     Agreement or of any of its directors, officers, employees, agents, legal or
     financial advisors or other representatives; provided, however, no such
     termination shall relieve any party to this Agreement from any liability
     for damages resulting from any breach of this Agreement.

          (b) In the event that: (i) an Acquisition Proposal shall have been
     made to Arch or have been made directly to Arch' stockholders or
     noteholders generally or any Person shall have publicly announced an
     intention (whether or not conditional) to make an Acquisition Proposal and
     thereafter: (A) Arch' stockholders do not adopt this Agreement or the other
     transactions contemplated hereby at the Arch Stockholders Meeting; (B) this
     Agreement is terminated by either Arch or PageNet pursuant to the terms of
     this Agreement and (C) Arch enters into an agreement with a third party
     with respect to an Acquisition Proposal within 12 months of the termination
     of this Agreement; (ii) this Agreement is terminated by PageNet pursuant to
     Section 8.3(a) or (b) provided that, with respect to Section 8.3(b), it is
     terminated solely with respect to a breach of (A) Section 6.2 or (B)
     Section 6.5 (but, only with respect to Arch' obligation in accordance with
     such Section to duly convene and complete the Arch Stockholders Meeting
     regarding the adoption of this Agreement and the matters set forth in
     Section 6.5(b) of this Agreement); or (iii) this Agreement is terminated by
     Arch pursuant to Section 8.4(f), then Arch and its Subsidiaries (jointly
     and severally) shall pay PageNet a fee equal to $40.0 million (the "PageNet
     Termination Fee"), which amount shall be in addition to any expenses to be
     paid pursuant to Section 6.12, payable by wire transfer of same day

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     funds. A PageNet Termination Fee payable pursuant to Section 8.5(b)(i), or
     (ii) shall be paid no later than two days after the date of termination and
     a PageNet Termination Fee payable pursuant to Section 8.5(b)(iii) shall be
     paid simultaneously with (and such payment shall be a condition of)
     termination pursuant to Section 8.4(f). Arch acknowledges that the
     agreements contained in this Section 8.5(b) are an integral part of the
     transactions contemplated by this Agreement, and that, without these
     agreements, PageNet would not enter into this Agreement. Accordingly, if
     Arch fails to pay promptly the amount due pursuant to this Section 8.5(b),
     and, in order to obtain such payment, PageNet commences a suit which
     results in a judgment against Arch for the fee set forth in this paragraph
     (b), Arch shall pay to PageNet its costs and expenses (including attorneys'
     fees) in connection with such suit, together with interest on the amount of
     the fee at the prime rate of Citibank N.A. in effect on the date such
     payment was required to be made.

          (c) In the event that: (i) an Acquisition Proposal shall have been
     made to PageNet or have been made directly to PageNet's stockholders or
     noteholders generally or any Person shall have publicly announced an
     intention (whether or not conditional) to make an Acquisition Proposal and
     thereafter: (A) PageNet's stockholders do not adopt this Agreement or the
     other transactions contemplated hereby at the PageNet Stockholders Meeting
     or PageNet's noteholders do not satisfy the PageNet Minimum Condition with
     respect to the PageNet Notes, and the Bankruptcy Court fails to enter the
     Final Confirmation Order which would otherwise enable the transactions set
     forth in this Agreement to occur without approval by the holders of PageNet
     Shares; (B) this Agreement is terminated by either Arch or PageNet pursuant
     to the terms of this Agreement and (C) either (x) PageNet executes and
     delivers an agreement with respect to an Acquisition Proposal or (y) an
     Acquisition Proposal with respect to PageNet is consummated, in either
     case, within 12 months of the date this Agreement is terminated; (ii) this
     Agreement is terminated by Arch pursuant to Section 8.4(a) or (b) provided
     that, with respect to Section 8.4(b), it is terminated solely with respect
     to a breach of (A) Section 6.2 or (B) Section 6.5 (but, only with respect
     to PageNet's obligation in accordance with such Section to duly convene and
     complete the PageNet Stockholders Meeting (unless the Bankruptcy Case has
     commenced or PageNet has stipulated to bankruptcy relief after the
     occurrence of an Involuntary Insolvency Event pursuant to Section
     6.19(a)(iv) hereof) regarding the adoption of this Agreement and the
     approval of the matters set forth in Section 6.5(a) of this Agreement);
     (iii) the Prepackaged Plan is withdrawn without the prior written consent
     of Arch, or PageNet files any other plan of reorganization or amends,
     modifies or adds to any material provision of the Prepackaged Plan in each
     case without the prior written consent of Arch; (iv) any other plan of
     reorganization filed by a person other than PageNet is confirmed by the
     Bankruptcy Court; (v) PageNet files a motion to sell or otherwise transfer
     all or a substantial portion of its assets as part of a sale pursuant to
     Section 363 of the Bankruptcy Code without the prior written consent of
     Arch; or (vi) this Agreement is terminated by PageNet pursuant to Section
     8.3(c) or (d), then PageNet and its Subsidiaries (jointly and severally)
     shall pay Arch a fee equal to $40.0 million (the "Arch Termination Fee"),
     which amount shall be in addition to any expenses to be paid pursuant to
     Section 6.12, payable by wire transfer of same day funds. A Arch
     Termination Fee payable pursuant to Section 8.5(c)(i), (ii), (iii), (iv) or
     (v) shall be paid no later than two days after the date of termination and
     a Arch Termination Fee payable pursuant to Section 8.5(c)(vi) shall be paid
     simultaneously with (and such payment shall be a condition of) termination
     pursuant to Section 8.3(c) or (d). PageNet acknowledges that the agreements
     contained in this Section 8.5(c) are an integral part of the transactions
     contemplated by this Agreement, and that, without these agreements, Arch
     and Merger Sub would not enter into this Agreement. Accordingly, if PageNet
     fails to pay promptly the amount due pursuant to this Section 8.5(c) (and
     in any case in which the Bankruptcy Case has been commenced, the Initial
     Merger Order approves this provision), and, in order to obtain such
     payment, Arch commences a suit which results in a judgment against PageNet
     for the fee set forth in this paragraph (c), PageNet shall pay to Arch its
     costs and expenses (including attorneys' fees) in connection with such
     suit, together with interest on the amount of the fee at the prime rate of
     Citibank N.A. in effect on the date such payment was required to be made.

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                                  ARTICLE IX.

                           MISCELLANEOUS AND GENERAL

     9.1.  Survival.  Article II, Article III, Article IV and this Article IX
(other than Section 9.4 (Counterparts)), and the agreements of PageNet, Arch and
Merger Sub contained in Sections 6.8 (Affiliates), 6.11 (Benefits), 6.12
(Expenses) and 6.13 (Indemnification; Directors' and Officers' Insurance) shall
survive the consummation of the Merger. This Article IX (other than Section 9.2
(Modification or Amendment), Section 9.3 (Waiver of Conditions) and Section 9.13
(Assignment)) and the agreements of PageNet, Arch and Merger Sub contained in
Section 6.12 (Expenses), Section 6.14 (Takeover Statute), Section 6.15
(Confidentiality) and Section 8.5 (Effect of Termination and Abandonment) shall
survive the termination of this Agreement. All other representations,
warranties, covenants and agreements in this Agreement shall not survive the
consummation of the Merger or the termination of this Agreement.

     9.2.  Modification or Amendment.  Subject to the provisions of the
applicable law, at any time prior to the Effective Time, the parties to this
Agreement may modify or amend this Agreement, by written agreement executed and
delivered by duly authorized officers of the respective parties.

     9.3.  Waiver of Conditions.

          (a) Any provision of this Agreement may be waived prior to the
     Effective Time if, and only if, such waiver is in writing and signed by an
     authorized representative or the party against whom the waiver is to be
     effective.

          (b) No failure or delay by any party in exercising any right, power or
     privilege under this Agreement shall operate as a waiver thereof nor shall
     any single or partial exercise thereof preclude any other or further
     exercise thereof or the exercise of any other right, power or privilege.
     Except as otherwise provided in this Agreement, the rights and remedies
     herein provided shall be cumulative and not exclusive of any rights or
     remedies provided by Law.

     9.4.  Counterparts.  This Agreement may be executed in any number of
counterparts, each such counterpart being deemed to be an original instrument,
and all such counterparts shall together constitute the same agreement.

     9.5.  Governing Law and Venue; Waiver of Jury Trial.

          (a) This Agreement shall be deemed to be made in and in all respects
     shall be interpreted, construed, and governed by, and in accordance with,
     the substantive laws of the State of Delaware, without regard to the
     conflict of law principles thereof. The parties hereby irrevocably and
     unconditionally consent to submit to the exclusive jurisdiction of the
     courts of the State of Delaware and of the United States of America located
     in Wilmington, Delaware, including the U.S. Bankruptcy Court for the
     District of Delaware (the "Delaware Courts"), for any litigation arising
     out of or relating to this Agreement or the Prepackaged Plan and the
     transactions contemplated by this Agreement (and agree not to commence any
     litigation relating thereto except in such Delaware Courts), waive any
     objection to the laying of venue of any such litigation in the Delaware
     Courts and agree not to plead or claim in any Delaware Court that such
     litigation brought therein has been brought in an inconvenient forum.

          (b) EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY
     ARISE UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT
     ISSUES, AND THEREFORE, EACH SUCH PARTY HEREBY IRREVOCABLY AND
     UNCONDITIONALLY WAIVES ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY
     WITH RESPECT TO ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, OR
     RELATING TO, THIS AGREEMENT, OR THE TRANSACTIONS CONTEMPLATED BY THIS
     AGREEMENT. EACH PARTY CERTIFIES AND ACKNOWLEDGES THAT: (i) NO
     REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED,
     EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF
     LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER; (ii) EACH SUCH PARTY
     UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF THIS WAIVER; (iii) EACH
     PARTY MAKES THIS

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     WAIVER VOLUNTARILY; AND (iv) EACH SUCH PARTY HAS BEEN INDUCED TO ENTER INTO
     THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND
     CERTIFICATIONS IN THIS SECTION 9.5.

     9.6.  Notices.  Notices, requests, instructions or other documents to be
given under this Agreement shall be in writing and shall be deemed given: (i)
when sent if sent by facsimile, provided that receipt of the fax is promptly
confirmed by telephone; (ii) when delivered, if delivered personally to the
intended recipient; and (iii) one business day later, if sent by overnight
delivery via a national courier service, and in each case, addressed to a party
at the following address for such party:

        If to Arch or Merger Sub:

               Arch Communications Group, Inc.
               1800 West Park Drive, Suite 250
               Westborough, Massachusetts 01581
               Attention: Chief Executive Officer
               Fax: (508) 870-6076

        with a copy to:

               Hale and Dorr LLP
               60 State Street
               Boston, Massachusetts 02109
               Attention: Jay E. Bothwick
               Fax: (617) 526-5000

        and if to PageNet:

               Paging Network, Inc.
               14911 Quorum Drive
               Dallas, Texas 75240
               Attention: Chief Executive Officer
               Fax: (972) 801-8950

        and
               Paging Network, Inc.
               14911 Quorum Drive
               Dallas, Texas 75240
               Attention: Senior Vice President and General Counsel
               Fax: (972) 801-8978

        with a copy to:

               Mayer, Brown & Platt
               190 South LaSalle Street
               Chicago, Illinois 60603-3441
               Attention: John R. Schmidt
               Fax: (312) 701-7711

or to such other persons or addresses as may be designated in writing by the
party to receive such notice as provided above.

     9.7.  Entire Agreement.  This Agreement (including any exhibits and annexes
to this Agreement), the Confidentiality Agreement, the PageNet Disclosure
Letter, and the Arch Disclosure Letter constitute the entire agreement, and
supersede all other prior agreements, understandings, representations and
warranties, both written and oral, among the parties with respect to the subject
matter of this Agreement. EACH PARTY TO THIS AGREEMENT AGREES THAT, EXCEPT FOR
THE REPRESENTATIONS AND WARRANTIES CONTAINED IN THIS AGREEMENT, NEITHER ARCH AND
MERGER SUB NOR PAGENET MAKES ANY REPRESENTATIONS OR WARRANTIES, AND EACH HEREBY
DISCLAIMS ANY OTHER REPRESENTATIONS OR WARRANTIES MADE BY ITSELF OR ANY OF ITS
OFFICERS, DIRECTORS, EMPLOYEES, AGENTS, FINANCIAL AND LEGAL ADVISORS OR OTHER
REPRESENTATIVES, WITH RESPECT TO THE
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EXECUTION AND DELIVERY OF THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY
THIS AGREEMENT, NOTWITHSTANDING THE DELIVERY OR DISCLOSURE TO THE OTHER PARTY OR
THE OTHER PARTY'S REPRESENTATIVES OF ANY DOCUMENTATION OR OTHER INFORMATION WITH
RESPECT TO ANY ONE OR MORE OF THE FOREGOING.

     9.8.  No Third Party Beneficiaries.  Except as provided in Section 6.11
(Benefits), and Section 6.13 (Indemnification; Directors' and Officers'
Insurance), this Agreement is not intended to confer upon any Person other than
the parties to this Agreement any rights or remedies under this Agreement.

     9.9.  Obligations of Arch and of PageNet.  Whenever this Agreement requires
a Subsidiary of Arch to take any action, such requirement shall be deemed to
include an undertaking on the part of Arch to cause such Subsidiary to take such
action. Whenever this Agreement requires a Subsidiary of PageNet to take any
action, such requirement shall be deemed to include an undertaking on the part
of PageNet to cause such Subsidiary to take such action and, after the Effective
Time, on the part of the Surviving Corporation to cause such Subsidiary to take
such action.

     9.10.  Severability.  The provisions of this Agreement shall be deemed
severable and the invalidity or unenforceability of any provision shall not
affect the validity or enforceability or the other provisions of this Agreement.
If any provision of this Agreement, or the application thereof to any Person or
any circumstance, is invalid or unenforceable: (a) a suitable and equitable
provision shall be substituted therefor in order to carry out, so far as may be
valid and enforceable, the intent and purpose of such invalid or unenforceable
provision; and (b) the remainder of this Agreement and the application of such
provision to other Persons or circumstances shall not be affected by such
invalidity or unenforceability, nor shall such invalidity or unenforceability
affect the validity or enforceability of such provision, or the application
thereof, in any other jurisdiction.

     9.11.  Interpretation.  Where a reference in this Agreement is made to a
section or exhibit, such reference shall be to a section of, or exhibit or annex
to this Agreement unless otherwise indicated. Whenever the words "include,"
"includes" or "including" are used in this Agreement, they shall be deemed to be
followed by the words "without limitation."

     9.12.  Captions.  The table of contents, article, section, and paragraph
captions in this Agreement are for convenience of reference only, do not
constitute part of this Agreement and shall not be deemed to limit or otherwise
affect any of the provisions of this Agreement.

     9.13.  Assignment.  This Agreement shall not be assignable by operation of
law or otherwise, provided, that the parties agree that this Agreement may be
assumed by PageNet as a debtor-in-possession in the Bankruptcy Case and may be
assumed by Arch should Arch become a debtor in any bankruptcy case under the
Bankruptcy Code. Any assignment in contravention of the preceding sentence shall
be null and void.

                                   * * * * *

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     IN WITNESS WHEREOF, this Agreement has been duly executed and delivered by
the duly authorized officers of the parties to this Agreement as of the date
first written above.

                                            PAGING NETWORK, INC.

                                            By: /s/ JOHN P. FRAZEE, JR.
                                              ----------------------------------
                                                Name: John P. Frazee, Jr.
                                              Title: Chairman of the Board and
                                              Chief Executive Officer

                                            ARCH COMMUNICATIONS GROUP, INC.

                                            By: /s/ C.E. BAKER, JR.
                                              ----------------------------------
                                                Name: C.E. Baker, Jr.
                                                Title: Chairman of the Board and
                                                Chief Executive Officer

                                            ST. LOUIS ACQUISITION CORP.

                                            By: /s/ C.E. BAKER, JR.
                                              ----------------------------------
                                                Name: C.E. Baker, Jr.
                                                Title: Chief Executive Officer

                                      A-44
<PAGE>   270

                                                                         ANNEX B

                          [LETTERHEAD OF BEAR STEARNS]

November 7, 1999

The Board of Directors
Arch Communications Group, Inc.
1800 West Park Drive, Suite 250
Westborough, Massachusetts 01581

Gentlemen:

     We understand that Arch Communications Group, Inc. ("Arch"), St. Louis
Acquisition Corp., a wholly owned subsidiary of Arch ("Merger Sub") and Paging
Network, Inc. ("PageNet") have entered into an Agreement and Plan of Merger (the
"Agreement") dated November 7, 1999, pursuant to which Merger Sub shall merge
with and into PageNet (the "Merger") and each PageNet Share (other than the
Excluded PageNet Shares) shall be converted into and become exchangeable for
0.124677 of a share (the "Exchange Ratio") of Arch Common Stock, subject to
adjustment as set forth in the Agreement. You have provided us with a copy of
the Agreement; all capitalized terms in this letter have the meanings assigned
to them in the Agreement, unless otherwise defined in this letter.

     You have asked us to render our opinion as to whether the Exchange Ratio is
fair, from a financial point of view, to the stockholders of Arch as of the date
of this letter.

     In the course of performing our review and analyses for rendering this
opinion, we have:

     - reviewed the Agreement;

     - reviewed Arch's and PageNet's Annual Reports to Stockholders and Annual
       Reports on Form 10-K for the years ended December 31, 1996 through 1998,
       and their Quarterly Reports on Form 10-Q for the periods ended March 31
       and June 30, 1999;

     - reviewed all Reports on Form 8-K of Arch and PageNet for the period
       commencing January 1, 1996 through the date hereof;

     - reviewed certain operating and financial information, including
       projections and synergy estimates, provided to us by Arch's and PageNet's
       management relating to the business and prospects of Arch and PageNet,
       respectively;

     - met with certain members of Arch's and PageNet's management to discuss
       the business, operations, historical and projected financial results and
       prospects of Arch and PageNet, respectively, as well as the potential
       synergies for the combined company resulting from the Merger (the
       "Combined Company");

     - reviewed the historical prices, trading multiples and trading volumes of
       the Arch Common Stock and the PageNet Shares;

     - reviewed publicly available financial data, stock market performance data
       and trading multiples of companies which we deemed generally comparable
       to Arch and PageNet, as appropriate;

                                       B-1
<PAGE>   271
Arch Communications Group, Inc.
November 7, 1999
Page  2

     - reviewed the terms of recent merger and acquisition transactions
       involving companies which we deemed generally comparable to Arch and
       PageNet;

     - performed discounted cash flow analyses based on the projections for Arch
       and the Combined Company furnished to us by Arch;

     - reviewed the pro forma financial results, financial condition and
       capitalization of the Combined Company; and

     - conducted such other studies, analyses, inquiries and investigations as
       we deemed appropriate.

     We have relied upon and assumed, with your permission, without independent
verification, the accuracy and completeness of the financial and other
information, including without limitation the projections and synergy estimates,
provided to us by Arch and PageNet. With respect to Arch's and PageNet's
projected financial results and the potential synergies that could be achieved
upon consummation of the Merger, we have assumed that they have been reasonably
prepared on bases reflecting the best currently available estimates and
judgments of the managements of Arch and PageNet as to the expected future
performance of Arch, PageNet and the Combined Company. We have not assumed any
responsibility for the independent verification of any such information or of
the projections and synergy estimates provided to us, and we have further relied
upon the assurances of the managements of Arch and PageNet that they are unaware
of any facts that would make the information, projections and synergy estimates
provided to us incomplete or misleading.

     In arriving at our opinion, we have not performed or obtained any
independent appraisal of the assets or liabilities of Arch and PageNet, nor have
we been furnished with any such appraisals. We have assumed that the Merger will
qualify as a tax-free "reorganization" within the meaning of Section 368(a) of
the Internal Revenue Code. We have assumed that the Merger will be consummated
without any regulatory limitations, restrictions, conditions, amendments or
modifications that collectively would have a material effect on Arch, PageNet or
the Combined Company. We have assumed that the other transactions contemplated
in connection with the Merger are in fact consummated as described in the
Agreement. Our opinion is necessarily based on economic, market and other
conditions, and the information made available to us, as of the date hereof.

     We do not express any opinion as to the price or range of prices at which
the shares of Arch Common Stock and the PageNet Shares may trade subsequent to
the announcement of the Merger or as to the price or range of prices at which
the shares of common stock of the Combined Company may trade subsequent to the
consummation of the Merger.

     We have acted as a financial advisor to Arch in connection with the Merger
and will receive a customary fee for such services. Bear Stearns has been
previously engaged by Arch to provide certain investment banking and financial
advisory services in connection with Arch's acquisition of MobileMedia
Communications, Inc. and Arch's issuance of 12 3/4% Senior Notes, 13 3/4% Senior
Notes and Series C Preferred Stock, for which transactions Bear Stearns received
customary fees. In the ordinary course of business, Bear Stearns may actively
trade the equity and debt securities of Arch and/or PageNet for our own account
and for the account of our customers and, accordingly, may at any time hold a
long or short position in such securities.

     It is understood that this letter is intended for the benefit and use of
the Board of Directors of Arch and does not constitute a recommendation to the
Board of Directors of Arch or any holders of Arch Common Stock as to how to vote
in connection with the Merger. This letter is not intended for the benefit or
use of the holders of the Arch Notes. This opinion does not address Arch's
underlying business decision to pursue the Merger. This letter is not to be used
for any other purpose, or reproduced, disseminated, quoted to or referred to at
any time, in whole or in part, without our prior written consent; provided,

                                       B-2
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Arch Communications Group, Inc.
November 7, 1999
Page  3

however, that this letter may be included in its entirety in any proxy statement
to be distributed to the holders of Arch Common Stock in connection with the
Merger.

     Based on and subject to the foregoing, it is our opinion that, as of the
date hereof, the Exchange Ratio is fair, from a financial point of view, to the
stockholders of Arch.

                                          Very truly yours,

                                          BEAR, STEARNS & CO. INC.

                                          By:
                                            ------------------------------------
                                                  Senior Managing Director

                                       B-3
<PAGE>   273

                                                                         ANNEX C

                               ARCH PAGING, INC.

                       SUMMARY OF PRINCIPAL TERMS OF THE
                  THIRD AMENDED AND RESTATED CREDIT AGREEMENT

                             PRELIMINARY STATEMENT

     This Summary (the "Term Sheet") sets forth the principal terms of the Third
Amended and Restated Credit Agreement, dated as of March 23, 2000, by and among
Arch Paging, Inc. (the "Borrower"), the Lenders party thereto, The Bank of New
York ("BNY"), Royal Bank of Canada ("RBC"), Toronto Dominion (Texas), Inc.
("TD"), Barclays Bank plc ("Barclays") and Fleet National Bank ("Fleet"), as
Managing Agents, RBC, as Documentation Agent, Barclays and Fleet, as Co-
Documentation Agents, TD, as Syndication Agent, and BNY, as Administrative Agent
(as amended by Amendment No. 1, dated as of May 19, 2000, the "Credit
Agreement"). Appendix A hereto contains a list of definitions which are used in
this Term Sheet. The lenders under the Credit Agreement having a Tranche A
Commitment and/or Tranche A Loans, Tranche B Loans and/or Tranche C Loans are
referred to as the "API Lenders". The terms of the Credit Agreement are not
limited to those set forth herein but rather are set forth in full in the Credit
Agreement and the collateral and other documents relating thereto (together with
the Credit Agreement, the "Loan Documents").

     The Credit Agreement was adopted in connection with the proposed
acquisition (the "Acquisition") of Paging Network, Inc., a Delaware corporation
("PageNet") and its Subsidiaries. The Acquisition is to be effected by the
merger (the "Merger") of PageNet with St. Louis Acquisition Corp., a newly
created direct wholly-owned Subsidiary ("Merger Sub") of Arch Communications
Group, Inc. (the "Parent") with PageNet as the survivor. Prior to the Merger,
one or more of PageNet's existing domestic Subsidiaries may be merged into
PageNet or one or more of its other existing domestic Subsidiaries. As a result
of the Merger, PageNet and its Subsidiaries will become wholly-owned
Subsidiaries of the Parent. It is contemplated that immediately after the
Merger, the Parent will contribute, directly or indirectly, all of the Stock of
PageNet to the Borrower (the "Dropdown").

     The Second Amended and Restated Credit Agreement, dated as of June 5, 1996,
as amended, among PageNet, its Subsidiaries party thereto, the lenders party
thereto (the "PageNet Lenders"), the Co-Agents party thereto, Bank of America,
N.A. (formerly, NationsBank of Texas, N.A.), as Documentation Agent, TD, as
Administrative Agent, and BankBoston, N.A. (formerly, The First National Bank of
Boston) and Chase Securities, Inc., as Co-Syndication Agents, and Bank of
Montreal, First Union National Bank (formerly, First Union National Bank of
North Carolina), Mercantile Bank National Association (formerly, Mercantile Bank
of St. Louis National Association), The Mitsubishi Trust and Banking
Corporation, Chicago Branch and Societe Generale, as Lead Managers (the
"Existing PageNet Credit Agreement") will be amended and restated in connection
with the Merger to become a part of the Credit Agreement and the outstanding
principal balance of the loans made under the Existing PageNet Credit Agreement
and the outstanding exposure of letters of credit issued under the Existing
PageNet Credit Agreement will be assumed by the Borrower and will be designated
as the Tranche B-1 Facility under the Credit Agreement. PageNet and its
Subsidiaries (other than certain of its Foreign Subsidiaries) which are
currently co-borrowers under the Existing PageNet Credit Agreement will become
Guarantors under the Credit Agreement.

                  MERGER; RECAPITALIZATION AND EXCHANGE OFFERS

     The Merger will be effected pursuant to the Agreement and Plan of Merger,
dated as of November 7, 1999, as amended by Amendment No. 1, dated as of January
7, 2000, by and among the Parent, Merger Sub and PageNet (as amended from time
to time with the consent of Required Lenders, the "Merger Agreement"). On the
date of the consummation of the Merger (the "Merger Effective Date") and
immediately after the time of the effectiveness of the Merger (the "Merger
Effective Time"), the
                                       C-1
<PAGE>   274

Dropdown shall take place. All documents executed and delivered in connection
with the Merger (including, without limitation, the Merger Agreement), the
Parent Exchange Offer (as defined below), the PageNet Exchange Offer (as defined
below), the Parent Preferred Stock Conversion (as defined below), the amendments
to the Parent's certificate of incorporation, the Spin-Off (as defined below),
the Dropdown, the PageNet Noteholder Consents (as defined below), the Parent
Noteholder Consents (as defined below), the amendments to the PageNet Indentures
and the Parent Discount Note Indenture, any PageNet Subsidiary Mergers and the
amended and restatement of the Existing PageNet Credit Agreement and related
collateral documents are referred to collectively as the "Merger Documents" and
the transactions contemplated thereby are referred to collectively as the
"Merger Transactions".

     In connection with the consummation of the Merger, a recapitalization of
the Parent, PageNet and their respective Subsidiaries are contemplated as
follows:

     First, the Parent will make an offer (the "Parent Exchange Offer") to
holders of the Parent Discount Notes to exchange such Parent Discount Notes for
common Stock of the Parent (the "Parent Exchange"). It is a condition to the
Parent Exchange Offer that at least 97.5% of the aggregate outstanding principal
amount of the Parent Discount Notes shall have been validly tendered and not
withdrawn prior to the expiration of the Parent Exchange Offer, provided that
PageNet has the right to reduce such minimum percentage to any specified level
prior to such expiration or to waive such requirement in its entirety and, under
certain circumstances, the Parent has the right to reduce such minimum
percentage to a percentage not less than 67%. As a condition to the acceptance
of the Parent Exchange Offer, holders thereof will be required to consent (the
"Parent Noteholder Consents") to certain amendments to the Parent Discount Notes
Indenture.

     Second, PageNet will make an offer (the "PageNet Exchange Offer" and
together with the Parent Exchange Offer, the "Exchange Offers") to holders (the
"PageNet Noteholders") of the 10% Senior Subordinated Notes due October 15,
2008, the 10.125% Senior Subordinated Notes due August 1, 2007 and the 8.875%
Senior Subordinated Notes due February 1, 2006, each issued by PageNet
(collectively, the "PageNet Notes") to exchange (collectively, the "PageNet
Exchange") such PageNet Notes for (i) shares of its common Stock and (ii) up to
68.9% of its equity ownership in VAST Solutions, Inc. (the "Distributed
Subsidiary"). It is a condition to the PageNet Exchange Offer that at least
97.5% of the aggregate outstanding principal amount of the PageNet Notes and not
less than 50% of the aggregate outstanding principal amount of each series of
PageNet Notes shall have been validly tendered and not withdrawn prior to the
expiration thereof. As a condition to the acceptance of the PageNet Exchange
Offer, PageNet Noteholders will be required to consent (the "PageNet Noteholder
Consents") to certain amendments to the indentures under which the PageNet Notes
were issued (collectively, the "PageNet Indentures") to, among other things,
permit the Merger. In the event that the minimum percentages set forth above are
not satisfied but the conditions to a prepackaged bankruptcy proceeding (the
"Bankruptcy Proceeding") have been satisfied, PageNet will commence the
Bankruptcy Proceeding and, in connection therewith, shall submit a plan of
reorganization (the "Plan of Reorganization") for confirmation. See "Additional
Conditions Precedent -- Bankruptcy Proceeding" below.

     Third, PageNet will distribute (the "Spin-Off") to the holders of its
common Stock who hold such shares prior to the acceptance of the PageNet
Exchange Offer (as defined above) up to 11.6% of its equity ownership in the
Distributed Subsidiary.

     Fourth, the Parent will seek the agreement of the holders of its Series C
Convertible Preferred Stock to, among other things, support an amendment to the
Parent's certificate of incorporation providing for the conversion of such
preferred Stock to common Stock of the Parent according to the ratio set forth
in the Merger Agreement (the "Parent Preferred Stock Conversion").

     Fifth, one or more of PageNet's existing domestic Subsidiaries may be
merged into PageNet or one or more of its other existing domestic Subsidiaries.

                                       C-2
<PAGE>   275

                                   COLLATERAL

     Prior to the merger (the "ACE Merger") of Arch Communications Enterprises,
Inc. ("ACE") into the Borrower on June 29, 1998, the API Lenders were granted a
first priority security interest in (i) the Stock of Arch Communications, Inc.
("Arch"), (ii) intercompany notes made by ACE and ACE's Subsidiaries, Arch
Connecticut Valley, Inc. and Arch Communications Enterprises, LLC (the "ACE
Subsidiaries") to the Parent and (iii) all assets of the ACE Subsidiaries,
including intercompany notes made by the Borrower and the Parent to the ACE
Subsidiaries and by ACE Subsidiaries to other ACE Subsidiaries, and the Stock of
the ACE Subsidiaries, in each case to the extent such assets, notes and Stock
existed at the time of the ACE Merger and such security interest was in effect
at the time of the ACE Merger (the "Existing API Collateral"). Under the terms
of the Existing Arch Indentures, the API Lenders are not required to share the
Existing API Collateral with the holders of the Existing Arch Senior Notes
("Existing Arch Senior Noteholders"). On a vote of Minority Lenders, the API
Lenders have a right to require a grant of a security interest in all other
assets of Arch and its Subsidiaries. However, under the terms of the Existing
Arch Indentures, if the API Lenders exercise this right, the Existing Arch
Senior Noteholders must be equally and ratably secured by such assets. Such
assets would include, for example, accounts receivable and inventory of the ACE
Subsidiaries which arose or were acquired after the ACE Merger, all of the
assets of the Borrower (which consist primarily of the assets of the former USA
Mobile companies), all of the assets of the MobileMedia companies, etc.

     The PageNet Lenders will be entitled to maintain their security interest in
the assets of PageNet and its Subsidiaries (including the Stock of such
Subsidiaries) existing at the time of the Merger (the "Existing PageNet
Collateral") but would be required to equally and ratably secure the Existing
Arch Senior Noteholders with any other assets in which the PageNet Lenders were
granted a security interest. The assets of the Canadian Subsidiaries of PageNet
will not constitute Existing PageNet Collateral or collateral to be shared with
the API Lenders and the Existing Arch Senior Noteholders for so long as the
existing Canadian credit facilities for such Subsidiaries remain in place.

     On the Merger Effective Date and immediately after the Merger Effective
Time, a security interest will be granted by Arch, the Borrower, PageNet and
each of their respective Subsidiaries that is a Guarantor in all of their
respective present and after acquired assets (other than the Existing API
Collateral, the Existing PageNet Collateral and the assets of the Canadian
Subsidiaries of PageNet for so long as the Canadian Subsidiaries' Canadian
credit facilities remain in place and, with respect to the Stock owned by such
Person of any Foreign Subsidiary that is not a Material Foreign Subsidiary,
limited to 65% of the Stock of such Foreign Subsidiary) for the equal and
ratable benefit of the API Lenders, the PageNet Lenders and the Existing Arch
Senior Noteholders.

     Following is a summary of the credit facilities under the Credit Agreement
(the "Credit Facilities") and the principal terms of the Credit Agreement and
the collateral and other documents relating thereto (the "Loan Documents").

BORROWER:                            Arch Paging, Inc., a Delaware corporation.

MANAGING AGENTS:                     BNY, TD, RBC, Barclays and Fleet.

ADMINISTRATIVE AGENT:                BNY.

DOCUMENTATION AGENT:                 RBC.

CO-DOCUMENTATION AGENTS:             Barclays and Fleet.

SYNDICATION AGENT:                   TD.

LEAD ARRANGERS AND BOOK RUNNERS:     BNY Capital Markets, Inc. and TD Securities
                                     (USA) Inc.

LENDERS:                             The API Lenders and, after the consummation
                                     of the Merger, the PageNet Lenders
                                     (together with the API Lenders, the
                                     "Lenders").

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<PAGE>   276

LETTER OF CREDIT ISSUING BANK:       BNY. The Administrative Agent, the Lenders
                                     and the Letter of Credit Issuing Bank are
                                     referred to collectively as the "Credit
                                     Parties").

COLLATERAL AGENTS:                   BNY, on behalf of the Lenders and the
                                     Applicable Arch Indenture Trustees, on
                                     behalf the Existing Arch Senior
                                     Noteholders.

TYPE OF FACILITIES:                  An aggregate of $1,327,555,000 (less the
                                     Tranche C amortization payment in the
                                     amount of $3,060,000 made on or about
                                     December 31, 1999) of senior Credit
                                     Facilities comprised of the following:

                                     Tranche A: A $175,000,000 reducing
                                     revolving credit facility (the "Tranche A
                                     Facility") pursuant to which revolving
                                     loans (the "Tranche A Loans") may be
                                     borrowed, prepaid and reborrowed and
                                     pursuant to which letters of credit may be
                                     issued as set forth below. The commitments
                                     of the Lenders under the Tranche A Facility
                                     are referred to as the "Tranche A
                                     Commitments", each a "Tranche A
                                     Commitment".

                                     The Borrower may request the issuance of
                                     letters of credit (each a "Letter of
                                     Credit") with a face amount not in excess
                                     of $5,000,000, subject to Tranche A
                                     Commitment reductions. Each such Letter of
                                     Credit shall have an expiry date of one
                                     year or less and with a final expiry date
                                     at least ten business days prior to the
                                     Final Maturity Date for the Tranche A
                                     Facility. The issuance of a Letter of
                                     Credit will be deemed a utilization of the
                                     Tranche A Facility. The outstanding
                                     principal balance of the Tranche A Loans
                                     plus the exposure in respect of Letters of
                                     Credit are referred to collectively as the
                                     "Tranche A Exposure".

                                     Tranche B: A $100,000,000 amortizing term
                                     loan facility (the "Tranche B Facility"),
                                     the loans under which are referred to as
                                     the "Tranche B Loans". The outstanding
                                     principal amount of the Tranche B Loans
                                     will amortize as set forth below.

                                     Tranche B-1: A $746,555,000 (less any
                                     Replaced Letters of Credit, as defined
                                     below) amortizing term loan facility (the
                                     "Tranche B-1 Facility"), consisting of (i)
                                     term loans in the aggregate principal
                                     amount of $745,000,000 plus any additional
                                     loans made in connection with the PageNet
                                     Letters of Credit as discussed below (the
                                     "Tranche B-1 Loans") and (ii) letters of
                                     credit issued by Bank of America, N.A.
                                     under the Existing PageNet Credit Agreement
                                     (the "PageNet Letters of Credit")
                                     outstanding on the Merger Effective Date
                                     (currently in the face amount of
                                     $1,555,000) less any PageNet Letters of
                                     Credit replaced by Letters of Credit under
                                     the Tranche A Facility on the Merger
                                     Effective Date (the "Replaced Letters of
                                     Credit"). The reimbursement obligations of
                                     the PageNet Lenders to Bank of America,
                                     N.A., as the letter of credit issuer under
                                     the Existing PageNet Credit Agreement, will
                                     continue to

                                       C-4
<PAGE>   277

                                     be governed by the provisions of the
                                     Existing PageNet Credit Agreement as if
                                     such Existing PageNet Credit Agreement was
                                     still in effect. If (i) any PageNet Letter
                                     of Credit is drawn before, on or after the
                                     Merger Effective Date, (ii) the issuer
                                     thereof is not reimbursed by PageNet, and
                                     (iii) the issuer thereof is reimbursed by
                                     the PageNet Lenders in accordance with the
                                     provisions of the Existing PageNet Credit
                                     Agreement, then the amount so reimbursed
                                     will be deemed to be additional Tranche B-1
                                     Loans made by the PageNet Lenders. The
                                     PageNet Letters of Credit cannot be renewed
                                     but, subject to availability, can be
                                     replaced by Letters of Credit issued under
                                     the Tranche A Facility. The outstanding
                                     principal amount of the Tranche B-1 Loans
                                     will amortize as set forth below.

                                     Tranche C: A $306,000,000 (less the Tranche
                                     C amortization payment in the amount of
                                     $3,060,000 made on or about December 31,
                                     1999) amortizing term loan facility (the
                                     "Tranche C Facility"), the loans under
                                     which are referred to as the "Tranche C
                                     Loans". The outstanding principal amount of
                                     the Tranche C Loans will amortize as set
                                     forth below.

                                     The Tranche A Loans, the Tranche B Loans,
                                     the Tranche B-1 Loans and the Tranche C
                                     Loans are referred to collectively as the
                                     "Loans".

CLOSING DATE:                        March 23, 2000.

FINAL MATURITY DATE:                 Tranche A Facility and Tranche B
                                     Facility -- the earlier to occur of (i)
                                     June 30, 2005, and (ii) the Adjusted
                                     Indenture Maturity Date.

                                     Tranche B-1 Facility and Tranche C
                                     Facility -- the earlier of (i) June 30,
                                     2006 and (ii) the Adjusted Indenture
                                     Maturity Date.

PURPOSE:                             For general corporate purposes of the
                                     Borrower and its Subsidiaries, including
                                     (i) capital expenditures, (ii) working
                                     capital, (iii) to finance permitted
                                     acquisitions, (iv) to make permitted
                                     Restricted Payments, (v) to make
                                     investments in PageNet's Canadian
                                     Subsidiaries in an aggregate amount not in
                                     excess of $2,000,000, (vi) in the event of
                                     the commencement of the Bankruptcy
                                     Proceeding, to repay the DIP Facility,
                                     provided that the aggregate amount of such
                                     repayment shall not exceed $50,000,000 and
                                     provided further that the conditions set
                                     forth in item 10 of "Condition Precedent to
                                     Merger" are satisfied, and (vii) to pay
                                     transactions costs.

SECURITY:                            1. The API Lenders will be entitled to
                                        continue their first priority perfected
                                        security interest in all Existing API
                                        Collateral, provided that the security
                                        interest granted by the Parent in the
                                        Stock of Arch and intercompany notes
                                        made by Arch, the Borrower and the ACE
                                        Subsidiaries

                                       C-5
<PAGE>   278

                                       to the Parent shall be subject to release
                                       as currently provided in the Loan
                                       Documents.

                                     2. The PageNet Lenders will be entitled to
                                        continue their first priority perfected
                                        security interest in the Existing
                                        PageNet Collateral, including 100% of
                                        its retained interest in the Distributed
                                        Subsidiary to the extent it constitutes
                                        Existing PageNet Collateral.

                                     3. On the Merger Effective Date and
                                        immediately after the Merger Effective
                                        Time, a first priority perfected
                                        security interest will be granted by
                                        Arch, the Borrower, PageNet and each of
                                        their respective Subsidiaries that is a
                                        Guarantor to the Collateral Agents for
                                        the equal and ratable benefit of the API
                                        Lenders, the PageNet Lenders and the
                                        Existing Arch Senior Noteholders in all
                                        of their respective present and after
                                        acquired assets (other than the Existing
                                        API Collateral, the Existing PageNet
                                        Collateral and the assets of any
                                        Canadian Subsidiary of PageNet which is
                                        a party to a loan document relating to a
                                        Canadian credit facility which is then
                                        in effect), provided that the percentage
                                        of Stock owned by such Person in any
                                        Foreign Subsidiary that is not a
                                        Material Foreign Subsidiary shall be
                                        limited to 65% of the Stock of such
                                        Foreign Subsidiary.

                                     4. The Credit Agreement provides for an
                                        intercreditor arrangement covering the
                                        Existing API Collateral and the Existing
                                        PageNet Collateral. The arrangement
                                        shall provide, among other things, for
                                        the ratable sharing of the proceeds of
                                        such collateral, provided, however, that
                                        the amount of the secured claim with
                                        respect to the Existing API Collateral
                                        and the Existing PageNet Collateral
                                        shall not be increased.

GUARANTORS:                          Guaranties of (i) all present and future
                                     direct and indirect Subsidiaries of the
                                     Parent, including on and after the Merger
                                     Effective Date, PageNet and its
                                     Subsidiaries, but excluding the Borrower,
                                     the Borrower's Foreign Subsidiaries which
                                     are not Material Foreign Subsidiaries and,
                                     until the Benbow Guaranty Date (as defined
                                     below), Benbow Investments, Inc. ("Benbow
                                     Investments") and Benbow PCS Ventures, Inc.
                                     ("Benbow") (if it is a Subsidiary at such
                                     time) and (ii) the Parent shall be provided
                                     to the Credit Parties. The guaranty of the
                                     Parent referred to in clause (ii) above
                                     shall be subject to release as currently
                                     provided in the Loan Documents.

RELEASE OF SECURITY; GUARANTORS:     At such time as (i) the Existing Arch
                                     Senior Note Termination Date has occurred
                                     and (ii) all action required to be taken to
                                     grant to the Administrative Agent a first
                                     perfected security interest in the
                                     collateral to be granted at such time shall
                                     have been taken (including the making of
                                     all required filings), then so long as no
                                     default or event of

                                       C-6
<PAGE>   279

                                     default exists or would be continuing
                                     before and after giving effect thereto and
                                     provided that the Administrative Agent
                                     shall have received a favorable opinion of
                                     counsel to the Borrower (in form and
                                     substance satisfactory to the
                                     Administrative Agent) as to the grant and
                                     perfection of such security interests, the
                                     Administrative Agent shall take such
                                     reasonable actions as requested by, and at
                                     the expense of, the Borrower, to release
                                     the Parent from its guaranty and the
                                     security interest in the collateral pledged
                                     to the Administrative Agent by the Parent
                                     thereunder.

SCHEDULED TRANCHE A COMMITMENT
REDUCTIONS:                          Commencing September 30, 2000, the Tranche
                                     A Commitment shall reduce through equal
                                     quarterly reductions occurring on the last
                                     business day of each March, June, September
                                     and December such that the following annual
                                     reductions occur:

<TABLE>
<CAPTION>
                                                                                      % REDUCTION IN
                                                YEAR ENDING                        TRANCHE A COMMITMENT
                                                -----------                        --------------------
                                                <S>                                <C>
                                                12/31/00.........................          10.0%
                                                12/31/01.........................          20.0%
                                                12/31/02.........................          20.0%
                                                12/31/03.........................          20.0%
                                                12/31/04.........................          20.0%
                                                12/31/05.........................          10.0%
</TABLE>

AMORTIZATION OF TRANCHE B
FACILITY:                            Commencing September 30, 2000, the Tranche
                                     B Facility shall amortize in equal
                                     quarterly installments occurring on the
                                     last business day of each March, June,
                                     September and December such that the
                                     following annual percentages of the Tranche
                                     B Facility are payable:

<TABLE>
<CAPTION>
                                                YEAR ENDING                        % OF TRANCHE B FACILITY
                                                -----------                        -----------------------
                                                <S>                                <C>
                                                12/31/00.........................            5.0%
                                                12/31/01.........................           12.5%
                                                12/31/02.........................           17.5%
                                                12/31/03.........................           22.5%
                                                12/31/04.........................           27.5%
                                                12/31/05.........................           15.0%
</TABLE>

AMORTIZATION OF TRANCHE B-1
FACILITY:                            Commencing March 31, 2001, the Tranche B-1
                                     Facility shall amortize in equal quarterly
                                     installments occurring on the last business
                                     day of each March, June, September and

                                       C-7
<PAGE>   280

                                     December such that the following annual
                                     percentages of the Tranche B-1 Facility are
                                     payable:

<TABLE>
<CAPTION>
                                                YEAR ENDING                      % OF TRANCHE B-1 FACILITY
                                                -----------                      -------------------------
                                                <S>                              <C>
                                                12/31/01.......................             2.5%
                                                12/31/02.......................            15.0%
                                                12/31/03.......................            20.0%
                                                12/31/04.......................            22.5%
                                                12/31/05.......................            25.0%
</TABLE>

                                     The remaining 15% of the Tranche B-1
                                     Facility will amortize in two equal
                                     installments on 3/31/06 and 6/30/06.

AMORTIZATION OF TRANCHE C
FACILITY:                            Commencing December 31, 1999, the Tranche C
                                     Facility shall amortize in annual
                                     installments occurring on the last business
                                     day of each year such that the following
                                     annual percentages of the Tranche C
                                     Facility are payable:

<TABLE>
<CAPTION>
                                                YEAR ENDING                        % OF TRANCHE C FACILITY
                                                -----------                        -----------------------
                                                <S>                                <C>
                                                12/31/99........................             1.0%
                                                12/31/00........................             1.0%
                                                12/31/01........................             1.0%
                                                12/31/02........................             1.0%
                                                12/31/03........................             1.0%
                                                12/31/04........................             1.0%
                                                12/31/05........................             1.0%
                                                12/31/06........................            93.0%
</TABLE>

INTEREST RATES:                      At the Borrower's option, the Loans will
                                     bear interest at either (i) the Applicable
                                     Margin plus, the greater of (a) the Federal
                                     Funds Effective Rate plus 1/2 of 1% and (b)
                                     BNY's prime commercial lending rate as
                                     publicly announced to be in effect from
                                     time to time (the "Alternate Base Rate"),
                                     or (ii) subject to legality and
                                     availability, the Administrative Agent's
                                     reserve-adjusted LIBOR interest rate plus
                                     the Applicable Margin. Interest periods for
                                     the LIBOR interest rate option shall be for
                                     periods of one, two, three or six months.

APPLICABLE MARGIN:                   Tranche A and Tranche B -- The Applicable
                                     Margin with respect to any interest rate
                                     option under the Tranche A Facility and the
                                     Tranche B Facility shall be determined on
                                     the basis of the Pricing Leverage Ratio as
                                     follows:

                                     Prior to the Merger Effective Date:

<TABLE>
<CAPTION>
              PRICING LEVERAGE RATIO                               ABR    LIBOR
              ----------------------                              -----   -----
              <S>                                                 <C>     <C>
              (greater than or equal to) 4.50:1.00..............  1.875%  3.125%
              (greater than or equal to) 4.00:1.00 (less than)
                4.50:1.00.......................................  1.500%  2.750%
              (greater than or equal to) 3.00:1.00 (less than)
                4.00:1.00.......................................  1.125%  2.375%
              (less than) 3.00:1.00.............................  0.750%  2.000%
</TABLE>

                                       C-8
<PAGE>   281

                                     On and after the Merger Effective Date:

<TABLE>
<CAPTION>
              PRICING LEVERAGE RATIO                               ABR    LIBOR
              ----------------------                              -----   -----
              <S>                                                 <C>     <C>
              (greater than or equal to) 3.50:1.00..............  2.125%  3.375%
              (greater than or equal to) 3.00:1.00 (less than)
                3.50:1.00.......................................  1.875%  3.125%
              (greater than or equal to) 2.50:1.00 (less than)
                3.00:1.00.......................................  1.500%  2.750%
              (less than) 2.50:1.00.............................  1.125%  2.375%
</TABLE>

                                     Tranche B-1 -- The Applicable Margin with
                                     respect to any interest rate option under
                                     the Tranche B-1 Facility shall be
                                     determined on the basis of the Pricing
                                     Leverage Ratio as follows:

<TABLE>
<CAPTION>
              PRICING LEVERAGE RATIO                                         ABR    LIBOR
              ----------------------                                        -----   -----
              <S>                                                           <C>     <C>
              (greater than or equal to) 3.50:1.00........................  2.125%  3.375%
              (greater than or equal to) 3.00:1.00 (less than)
                3.50:1.00.................................................  1.875%  3.125%
              (greater than or equal to) 2.50:1.00 (less than)
                3.00:1.00.................................................  1.500%  2.750%
              (less than) 2.50:1.00.......................................  1.125%  2.375%
</TABLE>

                                     Changes in the Applicable Margin with
                                     respect to the Tranche A Facility, the
                                     Tranche B Facility and the Tranche B-1
                                     Facility shall become effective two
                                     business days after the date of delivery of
                                     a compliance certificate required to be
                                     delivered by the Borrower, provided,
                                     however, that in the event the Borrower
                                     fails to deliver a compliance certificate
                                     on a timely basis, the Pricing Leverage
                                     Ratio shall be deemed to be greater than
                                     the highest pricing level under each of the
                                     above grids until a compliance certificate
                                     is delivered which shows a lower Pricing
                                     Leverage Ratio.

                                     Tranche C -- The Applicable Margin with
                                     respect to any interest rate option under
                                     the Tranche C Facility shall be 6.875% with
                                     respect to borrowings bearing interest
                                     based upon LIBOR ("LIBOR Advances") and
                                     5.625% with respect to ABR Advances.

DEFAULT RATE OF INTEREST:            Following the occurrence of and during the
                                     continuation of an Event of Default,
                                     interest on the outstanding principal
                                     balance of the Loans shall accrue at then
                                     applicable interest rates plus 2.00% per
                                     annum. If any amount payable under the Loan
                                     Documents (other than the principal of the
                                     Loans) is not paid when due, such amount
                                     shall bear interest at the Alternate Base
                                     Rate plus the Applicable Margin plus 2.00%
                                     per annum from the date of nonpayment until
                                     paid in full. All such interest shall be
                                     payable on demand.

COMMITMENT FEES:                     A non-refundable per annum fee payable to
                                     the Administrative Agent for pro-rata
                                     distribution to the Lenders with Tranche A
                                     Commitments shall accrue on the average
                                     daily unused portion of the Tranche A
                                     Commitments, deter-

                                       C-9
<PAGE>   282

                                     mined on the basis of the Pricing Leverage
                                     Ratio, as follows:

                                     Prior to the Merger Effective Date:

<TABLE>
<CAPTION>
                                                    PRICING LEVERAGE RATIO                              COMMITMENT FEE
                                                    ----------------------                              --------------
<S>                                                 <C>                                                 <C>
                                                    (greater than or equal to)4.00:1.00...............      0.500%
                                                    (less than)4.00:1.00..............................      0.375%
</TABLE>

                                     On and after the Merger Effective Date:

<TABLE>
<CAPTION>
                                                    PRICING LEVERAGE RATIO                              COMMITMENT FEE
                                                    ----------------------                              --------------
<S>                                                 <C>                                                 <C>
                                                    (greater than or equal to)3.00:1.00...............       1.00%
                                                    (less than)3.00:1.00..............................       0.75%
</TABLE>

                                     Changes in the applicable commitment fee
                                     percentage shall become effective two
                                     business days after the date of delivery of
                                     a compliance certificate required to be
                                     delivered by the Borrower, provided,
                                     however, that in the event the Borrower
                                     fails to deliver a compliance certificate
                                     on a timely basis, the Pricing Leverage
                                     Ratio shall be deemed to be greater than
                                     the highest pricing level under each of the
                                     above grids until a compliance certificate
                                     is delivered which shows a lower Pricing
                                     Leverage Ratio. Commitment Fees shall be
                                     computed on the basis of the actual number
                                     of days elapsed in a year comprised of 365
                                     days or, if appropriate, 366 days and shall
                                     be payable quarterly in arrears on the last
                                     day of March, June, September and December.

LETTER OF CREDIT FEES:               A non-refundable per annum fee payable to
                                     the Administrative Agent for pro-rata
                                     distribution to the Lenders having Tranche
                                     A Commitments, shall accrue on the face
                                     amount of each Letter of Credit equal to
                                     the Applicable Margin in effect for the
                                     LIBOR interest rate option under the
                                     Tranche A Facility. Letter of Credit Fees
                                     shall be computed on the basis of the
                                     actual number of days elapsed in a year
                                     comprised of 360 days and shall be payable
                                     quarterly in arrears on the last day of
                                     March, June, September and December.

CLOSING FEE FOR EXISTING PAGENET
LENDERS:                             A non-refundable fee of $5,000,000 payable
                                     to the Administrative Agent for the pro
                                     rata account of each Existing PageNet
                                     Lender which executes and delivers the
                                     Joinder and Assumption Agreement described
                                     in the Credit Agreement, payable on the
                                     Merger Effective Date.

CALCULATION AND PAYMENT OF
INTEREST:                            Interest shall be computed on the basis of
                                     the actual number of days elapsed in a year
                                     comprised of 360 days (or, in the case of
                                     Loans bearing interest at the Alternate
                                     Base Rate based on the prime rate, 365 days
                                     or, if appropriate, 366 days). Except as
                                     provided under the heading "Default Rate of
                                     Interest", above, interest at (i) the
                                     Alternate Base Rate shall be payable
                                     quarterly in arrears on the last day of
                                     each March, June, September and December
                                     and (ii) LIBOR shall be payable on the

                                      C-10
<PAGE>   283

                                     last day of the applicable interest period,
                                     provided that if the applicable interest
                                     period is greater than three months,
                                     interest shall be payable on the last day
                                     of each three month interval occurring
                                     during such interest period and the last
                                     day of such interest period.

PREPAYMENTS & COMMITMENT
REDUCTIONS:                          Voluntary Commitment Reductions -- The
                                     Borrower may terminate or permanently
                                     reduce the unused portion of the Tranche A
                                     Commitment. All such reductions must be in
                                     a minimum amount of $1,000,000 and $100,000
                                     multiples thereof.

                                     Voluntary Prepayments -- The Borrower may
                                     prepay Loans (subject to break funding
                                     indemnities and the prepayment fee
                                     described under the heading "Prepayment Fee
                                     on Prepayments of Tranche C Loans" below),
                                     subject to a minimum prepayment of
                                     $1,000,000 plus $100,000 multiples thereof.
                                     The Borrower shall designate the Tranche to
                                     which each prepayment shall apply and any
                                     voluntary prepayments made on the Tranche B
                                     Facility, the Tranche B-1 Facility or the
                                     Tranche C Facility shall be applied
                                     respectively to the remaining amortization
                                     installments thereof on a pro rata basis.

                                     Mandatory Commitment Reductions and
                                     Prepayments:

                                       On or before each date set forth below,
                                       the Borrower shall prepay the Tranche B
                                       Loans, the Tranche B-1 Loans and the
                                       Tranche C Loans (and, if no Tranche B
                                       Loans are outstanding, the Tranche A
                                       Commitment is to be reduced) as set forth
                                       below by an amount equal to the amount
                                       set forth in subparagraphs (a) through
                                       (d) below and applicable to such date
                                       (the "Aggregate Prepayment/ Reduction
                                       Amount"):

                                          Excess Cash Flow -- For each fiscal
                                          year prior to the fiscal year in which
                                          the Existing Arch Senior Note
                                          Termination Date occurs, commencing
                                          with the fiscal year ended December
                                          31, 1999, and effective on March 31st
                                          of each immediately succeeding fiscal
                                          year, in an aggregate amount equal to
                                          the following: (i) if the Total
                                          Leverage Ratio at the end of such
                                          fiscal year is greater than 4.00:1.00,
                                          the lesser of (A) 80% of Excess Cash
                                          Flow (the "Maximum Excess Cash Flow
                                          Amount") and (B) an amount equal to
                                          the sum of (1) the portion of the
                                          Maximum Excess Cash Flow Amount which
                                          will reduce the Total Leverage Ratio
                                          to 4.00:1:00 at the end of such fiscal
                                          year, plus (2) 50% of the amount equal
                                          to Excess Cash Flow minus such portion
                                          referred to in clause (B)(1) above, or
                                          (ii) if the Total Leverage Ratio at
                                          the end of such fiscal year is less
                                          than or equal to 4.00:1.00, 50% of
                                          Excess Cash Flow.

                                          Asset Sales -- 100% of the net cash
                                          proceeds received from asset sales,
                                          other than those in the ordinary

                                      C-11
<PAGE>   284

                                         course of business, subject to
                                         customary reinvestment provisions.

                                          Insurance and Condemnation
                                          Awards -- 100% of all property
                                          insurance recoveries and condemnation
                                          awards in excess of amounts used to
                                          replace or restore any properties,
                                          subject to customary reinvestment
                                          provisions.

                                          Breakup Fee -- 100% of any breakup or
                                          similar fee received by the Parent or
                                          any of its Affiliates under the Merger
                                          Agreement in the event that the Merger
                                          is not consummated less the amount
                                          thereof used by the Parent or Arch
                                          during the six month period following
                                          the receipt thereof to repay, redeem
                                          or otherwise retire any of the Parent
                                          Discount Notes, the Parent
                                          Subordinated Debentures or the
                                          Existing Arch Senior Notes, such
                                          prepayment to be made on the last day
                                          of such period.

                                       In addition to the Scheduled Tranche A
                                       Commitment Reduction, the Tranche A
                                       Commitment shall be permanently reduced
                                       as described under the heading
                                       "Application of Mandatory Prepayments &
                                       Commitment Reductions", below. The
                                       Borrower shall prepay the Tranche A Loans
                                       so that the Tranche A Exposure does not
                                       exceed the Tranche A Commitment as so
                                       reduced.

                                       The Tranche A Loans shall be due and
                                       payable on the termination of the Tranche
                                       A Commitment.

                                     Simultaneously with the termination and
                                     each reduction of the Aggregate Tranche A
                                     Commitments, the Borrower shall pay to the
                                     Administrative Agent, for the pro rata
                                     account of the Lenders holding Tranche A
                                     Commitments, accrued Commitment Fees (to
                                     the date of termination or reduction) on
                                     the terminated or reduced portion thereof.

APPLICATION OF MANDATORY
PREPAYMENTS & COMMITMENT
  REDUCTIONS:                        The Aggregate Prepayment/Reduction Amount
                                     to be applied on any date shall be applied
                                     as follows:

                                     Tranche B Facility -- The Tranche B Loans
                                     shall be prepaid in an amount equal to the
                                     product of (i) Aggregate
                                     Prepayment/Reduction Amount to be applied
                                     and (ii) the Aggregate Tranche B
                                     Percentage.

                                     Tranche B-1 Facility -- The Tranche B-1
                                     Loans shall be prepaid in an amount equal
                                     to the product of (i) Aggregate
                                     Prepayment/Reduction Amount to be applied
                                     and (ii) the Aggregate Tranche B-1
                                     Percentage.

                                     Tranche C Facility -- The Tranche C Loans
                                     shall be repaid in an amount equal to the
                                     product of (i) Aggregate
                                     Prepayment/Reduction Amount to be applied
                                     and (ii) the Aggregate Tranche C
                                     Percentage.

                                      C-12
<PAGE>   285

                                     Tranche A Facility -- If as of any date
                                     after applying all or any portion of the
                                     Aggregate Prepayment/Reduction Amount to
                                     the Tranche B Loans, the Tranche B Loans
                                     shall have been paid in full, the Tranche A
                                     Facility shall be permanently reduced in an
                                     amount equal to the Aggregate
                                     Prepayment/Reduction Amount to be applied
                                     as of such date minus the sum of (i) the
                                     product of the Aggregate Tranche B-1
                                     Percentage and the Aggregate Prepayment/
                                     Reduction Amount to be applied as of such
                                     date and (ii) the product of the Aggregate
                                     Tranche C Percentage and the Aggregate
                                     Prepayment/Reduction Amount to be applied
                                     as of such date.

                                     Each reduction of the Tranche A Commitment
                                     shall be applied to the remaining Scheduled
                                     Tranche A Commitment Reductions on a pro
                                     rata basis.

                                     Prepayments of the Tranche B Loans, the
                                     Tranche B-1 Loans and Tranche C Loans shall
                                     be applied on a pro rata basis to the
                                     remaining respective amortization
                                     installments of such Loans.

PREPAYMENT FEE:                      If the Borrower makes a voluntary
                                     prepayment of Tranche C Loans during the
                                     periods set forth below, the Borrower shall
                                     pay to each Tranche C Lender together with
                                     the prepayment, a prepayment fee equal to
                                     the following percentages of the principal
                                     amount of such prepayment:

<TABLE>
<CAPTION>
                                                   PERIOD                                         FEE
                                                   ------                                         ----
                                                   <S>                                            <C>
                                                   6/3/99-11/30/99..............................  2.00%
                                                   12/1/99-5/29/00..............................  1.50%
                                                   5/30/00-11/26/00.............................  1.00%
                                                   11/27/00-5/26/01.............................  0.50%
                                                   5/27/01 and thereafter.......................  0.00%
</TABLE>

REPRESENTATIONS & WARRANTIES:        Customary for the type of transaction
                                     proposed and others to be reasonably
                                     specified by the Managing Agents, in each
                                     case to be applied to Arch and its
                                     Subsidiaries, including, without
                                     limitation, representations and warranties
                                     relating to: Subsidiaries and
                                     capitalization; the existence,
                                     qualification and good standing of the Loan
                                     Parties; authorization; title to
                                     properties; liens; employee benefits; the
                                     accuracy and fair presentation of financial
                                     statements; absence material adverse change
                                     in the financial condition, business
                                     operations or properties of the Borrower
                                     and its Subsidiaries, if any, since
                                     December 31, 1998; the noncontravention of
                                     organizational documents, laws and material
                                     agreements; the absence of litigation; the
                                     payment of taxes and other material
                                     obligations; compliance with environmental
                                     and other laws; receipt of necessary
                                     approvals; insurance; validity of licenses,
                                     permits and franchises, including FCC
                                     licenses; and the power and authority of
                                     the Loan Parties to execute, deliver and
                                     perform obligations pursuant to the

                                      C-13
<PAGE>   286

                                     Loan Documents. In addition, the Parent's
                                     guaranty contains comparable
                                     representations and warranties.

CONDITIONS PRECEDENT TO MERGER:      Customary for the type of transaction
                                     proposed, and others to be reasonably
                                     specified by the Managing Agents,
                                     including, without limitation:

                                     Execution and delivery of definitive
                                     documentation relating to the amendment and
                                     restatement of the Existing PageNet Credit
                                     Agreement and related collateral documents
                                     and the assumption of the loans thereunder
                                     by the Borrower, signed by the Borrower and
                                     each Person then a party to the Existing
                                     PageNet Credit Agreement or related
                                     collateral documents; and other
                                     documentation, including, without
                                     limitation, a joinder and assumption
                                     agreement.

                                     Replacement of certain Schedules to the
                                     Credit Agreement and related collateral
                                     documents, in form and substance acceptable
                                     to the Managing Agents.

                                     Execution and delivery of promissory notes
                                     for the Lenders (other than Tranche A
                                     Lenders, Tranche B Lenders and Tranche C
                                     Lenders).

                                     Execution and delivery of joinder
                                     supplements to the subsidiary guaranty and
                                     applicable collateral documents by PageNet,
                                     its domestic Subsidiaries and its Material
                                     Foreign Subsidiaries.

                                     (a) The stockholders of the Parent shall
                                     have approved the Merger Transactions, (b)
                                     either (i) the stockholders of PageNet
                                     shall have approved the Merger
                                     Transactions, or (ii) the conditions
                                     precedent under the heading "Additional
                                     Conditions Precedent -- Bankruptcy
                                     Proceeding" below shall have been
                                     satisfied, and (c) the Administrative Agent
                                     shall have received a certificate of the
                                     secretary or assistant secretary of the
                                     Parent to the foregoing effects.

                                     The receipt by the Administrative Agent of
                                     a certificate, dated as of the Merger
                                     Effective Date, of the Secretary or
                                     Assistant Secretary of each of PageNet and
                                     each of its Subsidiaries that is a party to
                                     a Transaction Document (1) either (x)
                                     attaching a true and complete copy of the
                                     resolutions of its Board of Directors or
                                     other managing body or Person and of all
                                     documents evidencing other necessary
                                     corporate or other action (in form and
                                     substance satisfactory to the
                                     Administrative Agent) taken by it to
                                     authorize the Transaction Documents to
                                     which it is a party and the consummation of
                                     the Transactions or (y) the conditions
                                     precedent under the heading "Additional
                                     Conditions Precedent -- Bankruptcy
                                     Proceeding" below shall have been
                                     satisfied, (2) attaching a true and
                                     complete copy of its certificate of
                                     incorporation and by-laws or other
                                     organizational documents, (3) setting forth
                                     the incumbency of its officer or officers
                                     who may sign such Transaction Documents,
                                     including therein a signature specimen of
                                     such

                                      C-14
<PAGE>   287

                                     officer or officers and (4) attaching a
                                     certificate of good standing of the
                                     Secretary of State of the jurisdiction of
                                     its incorporation and of each other state
                                     in which it is qualified to do business,
                                     together with such other documents as the
                                     Administrative Agent shall require.

                                     The Administrative Agent shall have
                                     received a certificate, dated as of the
                                     Merger Effective Date, of the Secretary or
                                     Assistant Secretary of each of the Parent
                                     and each of its Subsidiaries that is a
                                     party to a Transaction Document (1)
                                     certifying that there have been no
                                     amendments, supplements or other
                                     modifications to the resolutions, the
                                     certificate of incorporation or by-laws
                                     delivered on the Closing Date or if so,
                                     setting forth the same, and (2) setting
                                     forth the incumbency of its officer or
                                     officers who may sign such Transaction
                                     Documents, including therein a signature
                                     specimen of such officer or officers,
                                     together with such other documents as the
                                     Administrative Agent shall require.

                                     (a) The Operating Cash Flow of PageNet for
                                     the three month period ending on the Merger
                                     Effective Date or, if the Merger Effective
                                     Date is not the last day of a month, for
                                     the immediately preceding three month
                                     period, multiplied by 4 shall not be less
                                     than $175,000,000, and the sum of (i)
                                     Annualized Operating Cash Flow of the
                                     Borrower plus (ii) Operating Cash Flow of
                                     PageNet for the three month period ending
                                     on the Merger Effective Date (or if the
                                     Merger Effective Date is not the last day
                                     of a month, for the immediately preceding
                                     three month period) multiplied by 4 shall
                                     not be less than $400,000,000, (b) the
                                     aggregate number of Pagers in Service of
                                     (i) PageNet and its Subsidiaries as of the
                                     Merger Effective Date shall not be less
                                     than 7,250,000 and (ii) the Borrower and
                                     its Subsidiaries and PageNet and its
                                     Subsidiaries on a combined basis as of the
                                     Merger Effective Date shall not be less
                                     than 13,175,000, and (c) the Administrative
                                     Agent shall have received a certificate of
                                     a financial officer of the Borrower
                                     (including calculations in reasonable
                                     detail) to the foregoing effect in form and
                                     substance satisfactory to the Managing
                                     Agents.

                                     The corporate, tax, capital and ownership
                                     structure (including articles of
                                     incorporation and by-laws), shareholders
                                     agreements and management of the Parent and
                                     its Subsidiaries before and after the
                                     consummation of the Transactions shall be
                                     satisfactory to the Managing Agents and the
                                     aggregate tax liability reasonably expected
                                     to be incurred by PageNet and its
                                     Subsidiaries and the Parent and its
                                     Subsidiaries as a result of the
                                     Transactions shall not exceed $15,000,000
                                     in the aggregate and the Administrative
                                     Agent shall have received a certificate of
                                     a financial officer of the Borrower to the
                                     foregoing effect in form and substance
                                     satisfactory to the Managing Agents.

                                      C-15
<PAGE>   288

                                     Immediately after the consummation of the
                                     Merger Transactions and the repayment in
                                     full of the DIP Facility, the Borrower
                                     shall have availability under the Tranche A
                                     Commitments in an amount not less than the
                                     sum of $85,000,000 minus an amount equal to
                                     the outstanding principal amount of the DIP
                                     Facility immediately prior to the
                                     consummation of the PageNet Merger in
                                     excess of $15,000,000 (but not more than
                                     $35,000,000) plus, without duplication, the
                                     amount of any fees or expenses incurred by
                                     the Parent or any of its Subsidiaries in
                                     connection with the Merger Transactions
                                     which are not paid on the Merger Effective
                                     Date.

                                     The Parent shall have completed the Parent
                                     Exchange Offer on terms satisfactory to the
                                     Managing Agents, at least 50% of the
                                     aggregate principal amount of the Parent
                                     Discount Notes outstanding on January 1,
                                     2000 shall have been validly tendered and
                                     not withdrawn or shall have been exchanged
                                     for common Stock of the Parent or other
                                     Stock of the Parent which, by its terms,
                                     converts to common Stock of the Parent on
                                     the Merger Effective Date, and the
                                     Administrative Agent shall have received a
                                     certificate of a financial officer of the
                                     Parent to the foregoing effects in form and
                                     substance satisfactory to the Managing
                                     Agents.

                                     (a) PageNet shall have completed the
                                     PageNet Exchange on terms satisfactory to
                                     the Managing Agents, at least 97.5% of the
                                     aggregate outstanding principal amount of
                                     PageNet Notes and at least 50% of the
                                     aggregate principal amount of each series
                                     of PageNet Notes shall have been validly
                                     tendered and not withdrawn, PageNet
                                     Noteholder Consents shall have been
                                     received from PageNet Noteholders holding
                                     at least such percentages of the aggregate
                                     outstanding principal amount of PageNet
                                     Notes, the PageNet Indentures shall have
                                     been either terminated or amended on terms
                                     satisfactory to the Managing Agents, and
                                     the Administrative Agent shall have
                                     received a certificate of a financial
                                     officer of the Parent to the foregoing
                                     effects in form and substance satisfactory
                                     to the Managing Agents, or (b) the
                                     conditions precedent under the heading
                                     "Additional Conditions
                                     Precedent -- Bankruptcy Proceeding" below
                                     shall have been satisfied.

                                     PageNet's shareholders' rights plan shall
                                     be inapplicable to the Merger Transactions
                                     and the Administrative Agent shall have
                                     received a certificate of a financial
                                     officer of the Parent to the foregoing
                                     effects in form and substance satisfactory
                                     to the Managing Agents.

                                     Except for the Bankruptcy Proceeding and
                                     orders issued by the court therein, there
                                     shall be no injunction, writ, preliminary
                                     restraining order or other order of any
                                     nature issued by any governmental body in
                                     any respect affecting the Transactions and
                                     no action or proceeding by or before any
                                     governmental body shall have been commenced
                                     and be

                                      C-16
<PAGE>   289

                                     pending or, to the knowledge of the Parent,
                                     the Borrower or Arch, be threatened,
                                     seeking to prevent or delay the
                                     Transactions or challenging any terms and
                                     provisions thereof or seeking any damages
                                     in connection therewith which would in the
                                     reasonable opinion of the Parent (or in the
                                     opinion of the Managing Agents in their
                                     sole discretion with respect to which
                                     written notice has been provided to the
                                     Parent by one or more of the Managing
                                     Agents), individually or in the aggregate,
                                     have a material adverse effect on (w) the
                                     business, property, financial condition,
                                     operations, projections or prospects of the
                                     Parent and its Subsidiaries on a
                                     consolidated basis, Arch and its
                                     Subsidiaries on a consolidated basis, the
                                     Borrower and its Subsidiaries on a
                                     consolidated basis or PageNet and its
                                     Subsidiaries on a consolidated basis; (x)
                                     the legality, validity or enforceability of
                                     any of the Transaction Documents, (y) the
                                     ability of the Borrower or any other Loan
                                     Party to perform its obligations under the
                                     Loan Documents, or (z) the rights and
                                     remedies of the Credit Parties under the
                                     Loan Documents, and the Administrative
                                     Agent shall have received a certificate of
                                     a financial officer of the Parent to the
                                     foregoing effects in form and substance
                                     satisfactory to the Managing Agents,
                                     provided that to the extent such
                                     certificate relates to PageNet, such
                                     certificate shall be to the best of the
                                     knowledge of such financial officer.

                                     The consummation of the Transactions shall
                                     not (i) constitute a default under any
                                     material agreement of the Parent, PageNet
                                     or any of their respective Subsidiaries
                                     (other than defaults resulting from the
                                     commencement of the Bankruptcy Proceeding
                                     or defaults nullified by the Plan of
                                     Reorganization or the Confirmation Order),
                                     (ii) require the prepayment, repurchase,
                                     redemption or defeasance (other than
                                     pursuant to the Exchange Offers or
                                     requirements nullified by the Plan of
                                     Reorganization or the Confirmation Order)
                                     of any indebtedness of the Parent, PageNet
                                     or any of their respective Subsidiaries
                                     prior to its scheduled maturity, including,
                                     without limitation, under any change of
                                     control or similar provision, or (iii)
                                     constitute a Change of Control, and the
                                     Administrative Agent shall have received a
                                     certificate of a financial officer of the
                                     Parent to the foregoing effects in form and
                                     substance satisfactory to the Managing
                                     Agents.

                                     The Administrative Agent shall have
                                     received a certificate of a financial
                                     officer of the Parent, dated the Merger
                                     Effective Date, in all respects
                                     satisfactory to the Administrative Agent
                                     certifying that as of the Merger Effective
                                     Date (i) no default or Event of Default
                                     exists and (ii) the representations and
                                     warranties contained in the Loan Documents
                                     are true and correct.

                                      C-17
<PAGE>   290

                                     (a) (1) Neither the Parent, Arch, the
                                     Borrower nor any of their respective
                                     Subsidiaries shall have sustained since
                                     December 31, 1998 any loss or interference
                                     with its respective business from fire,
                                     explosion, flood or other calamity, whether
                                     or not covered by insurance or from any
                                     labor dispute or court or governmental
                                     action order, or decree, (2) except for the
                                     Additional Tranche C Loans (as defined in
                                     and made under the Existing Tranche A and
                                     Tranche C Credit Agreement) and the Arch
                                     13 3/4% Notes, since such date there shall
                                     not have been a material increase in
                                     short-term debt or long-term debt of the
                                     Parent, Arch, the Borrower or any of their
                                     respective Subsidiaries (other than debt
                                     contemplated by this Agreement), and (3)
                                     since such date there shall not have been
                                     any change, or any development involving a
                                     prospective change, that could in the
                                     reasonable opinion of the Parent reasonably
                                     be expected to result (or in the opinion of
                                     the Managing Agents in their sole
                                     discretion with respect to which written
                                     notice has been provided to the Parent by
                                     one or more of the Managing Agents be
                                     expected to result) in a material adverse
                                     effect on (i) the business, property,
                                     financial condition, operations,
                                     projections or prospects of the Parent and
                                     its Subsidiaries on a consolidated basis or
                                     Arch and its Subsidiaries on a consolidated
                                     basis; (ii) the legality, validity or
                                     enforceability of any of the Loan
                                     Documents, (iii) the ability of the
                                     Borrower to repay its obligations under the
                                     Loan Documents or of any other Loan Party
                                     to perform its obligations under the Loan
                                     Documents, or (iv) the rights and remedies
                                     of the Credit Parties under the Loan
                                     Documents.

                                     (b) (1) Except to the extent publicly
                                     disclosed by PageNet prior to the Closing
                                     Date, neither PageNet nor any of its
                                     Subsidiaries shall have sustained since
                                     December 31, 1998, any loss or interference
                                     with its respective business from fire,
                                     explosion, flood or other calamity, whether
                                     or not covered by insurance or from any
                                     labor dispute or court or governmental
                                     action order, or decree (other than, in the
                                     event of the commencement of the Bankruptcy
                                     Proceeding, litigation before the
                                     Bankruptcy Court which litigation is
                                     disposed of pursuant to the Confirmation
                                     Order (described under the heading
                                     "Additional Conditions
                                     Precedent -- Bankruptcy Proceeding" below)
                                     other than as set forth in its audited
                                     financial statements as of that date, (2)
                                     since such date, except for borrowings
                                     under the Existing PageNet Credit Agreement
                                     and borrowings under the DIP Facility,
                                     there shall not have been a material
                                     increase in short-term debt or long-term
                                     debt of PageNet or any of its Subsidiaries
                                     (other than, in the event of the
                                     commencement of the Bankruptcy Proceeding,
                                     pursuant to the DIP Loan Documents, as
                                     permitted in the PageNet Merger Documents),
                                     and (3) except to the extent publicly
                                     disclosed by PageNet

                                      C-18
<PAGE>   291

                                     prior to the Closing Date, since such date
                                     there shall not have been any change, or
                                     any development involving a prospective
                                     change (other than the commencement of the
                                     Bankruptcy Proceeding), that could in the
                                     reasonable opinion of the Parent reasonably
                                     be expected to result (or in the opinion of
                                     the Managing Agents in their sole
                                     discretion with respect to which written
                                     notice has been provided to the Parent by
                                     one or more of the Managing Agents be
                                     expected to result) in a material adverse
                                     effect on (i) the business, property,
                                     financial condition, operations,
                                     projections or prospects of PageNet and its
                                     Subsidiaries on a consolidated basis; (ii)
                                     the legality, validity or enforceability of
                                     any of the Loan Documents, (iii) the
                                     ability of the Borrower to repay its
                                     obligations under the Loan Documents or of
                                     any other Loan Party to perform its
                                     obligations under the Loan Documents, or
                                     (iv) the rights and remedies of the Credit
                                     Parties under the Loan Documents.

                                     (c) The Administrative Agent shall have
                                     received a certificate of a financial
                                     officer of the Parent, dated the Merger
                                     Effective date, in all respects
                                     satisfactory to the Managing Agents
                                     certifying to clauses (a) and (b) above,
                                     provided, that with respect to clause (b),
                                     such certificate shall be to the best of
                                     the knowledge of such financial officer.
                                     The filing of the Bankruptcy Proceeding
                                     shall not, in and of itself, be deemed to
                                     be a material adverse change with respect
                                     to PageNet and its Subsidiaries.

                                     The Administrative Agent shall have
                                     received financial projections (giving
                                     effect to the Merger) of (i) the Parent and
                                     its Subsidiaries on a consolidated basis,
                                     (ii) Arch and its Subsidiaries on a
                                     consolidated basis, (iii) the Borrower and
                                     its Subsidiaries on a consolidated basis,
                                     and (iv) PageNet and its Subsidiaries on a
                                     consolidated basis, in each case after
                                     giving effect to the Merger, for the period
                                     through the Tranche C Maturity Date, each
                                     in form and substance satisfactory to the
                                     Managing Agents.

                                     The Administrative Agent shall have
                                     received a certified copy of a final order
                                     of the FCC approving the transfer of
                                     control of such of PageNet and its
                                     Subsidiaries which hold FCC licenses to the
                                     Parent or any of its Subsidiaries.

                                     All approvals and consents of all Persons
                                     required to be obtained prior to the Merger
                                     Effective Date in connection with the
                                     consummation of the Transactions
                                     (including, without limitation, the lenders
                                     under the Existing PageNet Credit Agreement
                                     and the noteholders under the PageNet
                                     Indentures and the Existing Arch
                                     Indentures, to the extent required) shall
                                     have been obtained and all required notices
                                     shall have been given and all required
                                     waiting periods shall have expired,
                                     including, without limitation, under the
                                     Hart-Scott-Rodino Antitrust Improvements
                                     Act of 1976, as amended (or expiration of
                                     applicable waiting periods), and

                                      C-19
<PAGE>   292

                                     no provision of any applicable statute,
                                     law, rule or regulation of any governmental
                                     body will prevent the execution, delivery
                                     or performance of, or affect the validity
                                     of, the Transaction Documents, and the
                                     Administrative Agent shall have received a
                                     certificate of an officer of the Parent in
                                     form and substance satisfactory to the
                                     Administrative Agent to the foregoing
                                     effects.

                                     The Administrative Agent shall have
                                     received (i) such UCC, tax, patent,
                                     trademark and judgment lien search reports
                                     with respect to such applicable public
                                     offices where Liens are filed, as shall be
                                     acceptable to the Administrative Agent,
                                     disclosing that there are no Liens of
                                     record in such official's office covering
                                     any collateral or showing the Parent,
                                     PageNet or any of their respective
                                     Subsidiaries as a debtor thereunder (other
                                     than liens permitted by the Loan
                                     Documents), (ii) a certificate of the
                                     Parent, dated the Merger Effective Date,
                                     certifying that, as of the Merger Effective
                                     Date, there will exist no Liens on the
                                     Collateral (other than liens permitted by
                                     the Loan Documents), and (iii) such Uniform
                                     Commercial Code financing statements or
                                     financing statement amendments, executed by
                                     the appropriate Loan Parties, as shall be
                                     reasonably requested by the Administrative
                                     Agent, together with either (x)
                                     satisfactory evidence that all taxes
                                     payable in connection with the filing of
                                     the UCC-1 financing statements have been
                                     paid or (y) a check payable to each
                                     applicable governmental body in payment of
                                     each such tax.

                                     Each of the conditions precedent contained
                                     in the Merger Documents to the consummation
                                     of the Merger Transactions shall have been
                                     satisfied (with no waiver of any condition
                                     thereof without the prior written consent
                                     of the Managing Agents), and the Merger
                                     Transactions (other than the Dropdown)
                                     shall have been consummated in accordance
                                     with the terms of the Merger Documents
                                     (with no amendment, supplement or other
                                     modification to any term or provision
                                     contained therein without the prior written
                                     consent of the Required Lenders (other than
                                     any amendment, supplement or other
                                     modification to any nonmaterial term or
                                     provision contained therein or any
                                     amendment, supplement or other modification
                                     which is not adverse to the Lenders which
                                     may be made with the prior written consent
                                     of the Managing Agents)) and all applicable
                                     laws, governmental policies, rules and
                                     regulations.

                                     All representations and warranties made in
                                     the Merger Documents by the Parent, Merger
                                     Sub and PageNet shall be true and correct
                                     in all material respects.

                                     The Administrative Agent shall have
                                     received a certificate of the Secretary or
                                     Assistant Secretary of the Parent, in all
                                     respects satisfactory to the Administrative
                                     Agent, (a) attaching a true and complete
                                     copy of each of the fully executed Merger
                                     Documents (including, without limitation,

                                      C-20
<PAGE>   293

                                     the Merger Agreement, the amendments to the
                                     PageNet Indentures and the Parent Discount
                                     Notes Indenture, the registration
                                     statements with respect to the Parent
                                     Exchange Offer and the PageNet Exchange
                                     Offer as filed with the SEC, all of which
                                     shall be satisfactory to the Managing
                                     Agents), and (b) certifying that (i) each
                                     Merger Document is in full force and
                                     effect, (ii) no default or event of default
                                     by the Parent or the Borrower or, to the
                                     best of the knowledge of the Parent and the
                                     Borrower, any other party, has occurred and
                                     is continuing thereunder and (iii) each of
                                     the conditions specified in paragraphs 22
                                     and 23 above have been satisfied, provided,
                                     however, that with respect to the
                                     representations and warranties made in the
                                     Merger Documents by PageNet or any of its
                                     Subsidiaries, such certification shall be
                                     made to the best knowledge of the Parent.

                                     The Administrative Agent shall have
                                     received, in form and substance
                                     satisfactory to the Managing Agents, such
                                     amendments, waivers or consents to the
                                     Transactions from the lenders under the
                                     documentation for the existing PageNet
                                     Canadian credit facilities, including,
                                     without limitation, amendments to limit the
                                     collateral thereunder to the assets of the
                                     PageNet Canadian Subsidiaries existing on
                                     the Merger Effective Date in which a Lien
                                     was granted prior to such date, as the
                                     Managing Agents shall require.

                                     The Administrative Agent shall have
                                     received a compliance certificate signed by
                                     a financial officer of the Borrower, in all
                                     respects reasonably satisfactory to the
                                     Administrative Agent, dated the Merger
                                     Effective Date, and (i) stating that the
                                     Borrower is in compliance with all
                                     covenants on a pro-forma basis after giving
                                     effect to the Transactions, and (ii)
                                     attaching a copy of a pro-forma
                                     Consolidated balance sheet of the Borrower
                                     utilized for purposes of preparing such
                                     compliance certificate, which pro-forma
                                     Consolidated balance sheet presents the
                                     Borrower's good faith estimate of its
                                     pro-forma Consolidated financial condition
                                     at the date thereof, after giving effect to
                                     the Transactions.

                                     Either (i) all of the Existing PageNet
                                     Lenders shall have consented to the
                                     consummation of the Merger Transactions and
                                     the Administrative Agent shall have
                                     received a Certificate of the Secretary or
                                     Assistant Secretary of the Parent to the
                                     foregoing effect or (ii) the conditions set
                                     forth under the heading "Additional
                                     Conditions Precedent -- Bankruptcy
                                     Proceeding" shall have been satisfied.

                                     The Merger shall occur on or before
                                     September 30, 2000.

                                     A certificate of merger shall have been
                                     filed with the Secretary of State of the
                                     State of Delaware, which certificate shall
                                     comply as to form and substance with the
                                     General Corporation Law of Delaware, and
                                     the Administrative Agent shall have
                                     received a certified copy thereof.

                                      C-21
<PAGE>   294

                                     With respect to each PageNet Subsidiary
                                     Merger, if any, a PageNet Subsidiary Merger
                                     Certificate shall have been filed with the
                                     applicable governmental body, each of which
                                     shall comply as to form and substance with
                                     applicable state law, and the
                                     Administrative Agent shall have received a
                                     certified copy thereof.

                                     The API Lenders' due diligence
                                     investigations with respect to the Parent,
                                     Arch, the Borrower and their respective
                                     Subsidiaries, PageNet and its Subsidiaries,
                                     the Acquisition and the other Transactions
                                     shall be satisfactory in all respects to
                                     Required Lenders.

                                     The Spin-Off shall have occurred.

                                     The Administrative Agent shall have
                                     received satisfactory legal opinions of
                                     counsel to the Loan Parties, including,
                                     without limitation, with respect to the tax
                                     treatment of the Merger Transactions and
                                     FCC matters, addressed to the
                                     Administrative Agent and the other Credit
                                     Parties, dated the Merger Effective Date
                                     and in form and substance satisfactory to
                                     the Administrative Agent.

                                     The percentage of shares of Stock of
                                     PageNet with respect to which the holders
                                     thereof shall have perfected their
                                     appraisal rights shall not exceed 5% of the
                                     outstanding shares of PageNet, the holders
                                     of which are entitled to appraisal rights,
                                     and the Administrative Agent shall have a
                                     received a certificate of a financial
                                     officer of the Parent, in form and
                                     substance satisfactory to the
                                     Administrative Agent, as to the foregoing,
                                     which certificate shall specify the number
                                     of such shares.

                                     All fees and expenses payable to the Agents
                                     and the Lenders on the Merger Effective
                                     Date shall have been paid, including the
                                     reasonable fees and expenses of counsel to
                                     the Administrative Agent.

                                     The Administrative Agent shall have
                                     received such other documents and
                                     assurances as the Managing Agents shall
                                     reasonably require.

ADDITIONAL CONDITIONS
PRECEDENT -- BANKRUPTCY
  PROCEEDING:                        In the event that (i) a vote in favor of
                                     the Plan of Reorganization by (A) PageNet
                                     Noteholders holding at least two-thirds of
                                     the aggregate principal amount of the
                                     PageNet Notes that are actually voted and
                                     by a majority in number of the PageNet
                                     Noteholders that actually vote and (B)
                                     lenders holding at least two-thirds of the
                                     aggregate principal amount of the
                                     indebtedness under the Existing PageNet
                                     Credit Agreement that are actually voted
                                     and by a majority in number of such lenders
                                     that actually vote, and (ii) certain other
                                     conditions set forth in the Merger
                                     Agreement are satisfied, PageNet will
                                     commence the Bankruptcy Proceeding. In the
                                     event that the Bankruptcy Proceeding has
                                     been commenced, as a condition to the

                                      C-22
<PAGE>   295

                                     consummation of the Merger Transactions the
                                     following additional conditions precedent
                                     shall have been satisfied:

                                     PageNet shall have submitted to the court
                                     the Plan of Reorganization which shall be
                                     acceptable in all respects to the Managing
                                     Agents.

                                     The DIP Facility shall have been repaid in
                                     full (including, subject to Item 10 of
                                     "Conditions Precedent to Merger", with the
                                     proceeds of Tranche A Loans), and all Liens
                                     in respect thereof shall have been
                                     terminated, and the Administrative Agent
                                     shall have received evidence, in form and
                                     substance satisfactory to the Managing
                                     Agents, to such effect.

                                     The Administrative Agent shall have
                                     received a court certified copy of a final
                                     confirmation order issued by the bankruptcy
                                     court confirming the Plan of Reorganization
                                     in form and substance satisfactory to the
                                     Managing Agents.

FINANCIAL COVENANTS:                 Customary for the type of transaction
                                     proposed, including, without limitation,
                                     the following:

                                     Total Leverage Ratio -- At all times prior
                                     to the Existing Arch Senior Note
                                     Termination Date, during the periods set
                                     forth below the Total Leverage Ratio shall
                                     not exceed the following:

                                     (a) prior to the Merger Effective Date:

<TABLE>
<CAPTION>
                                                   PERIOD                              TOTAL LEVERAGE RATIO
                                                   ------                              --------------------
                                                   <S>                                 <C>
                                                   Closing Date through 6/29/00......       4.50:1.00
                                                   6/30/00 through 6/29/01...........       4.25:1.00
                                                   6/30/01 through 6/29/02...........       4.00:1.00
                                                   6/30/02 and thereafter............       3.50:1.00
</TABLE>

                                     (b) on and after the Merger Effective Date:

<TABLE>
<CAPTION>
                                                   PERIOD                              TOTAL LEVERAGE RATIO
                                                   ------                              --------------------
                                                   <S>                                 <C>
                                                   Merger Effective Date through
                                                     6/29/01.........................       4.25:1.00
                                                   6/30/01 through 9/29/01...........       4.00:1.00
                                                   9/30/01 through 12/30/01..........       3.75:1.00
                                                   12/31/01 and thereafter...........       3.50:1.00
</TABLE>

                                     At all times on and after the Existing Arch
                                     Senior Note Termination Date, the Total
                                     Leverage Ratio shall not exceed 4.00:1.00.

                                     API Leverage Ratio -- At all times the API
                                     Leverage Ratio shall be less than or equal
                                     to:

                                     (a) prior to the Merger Effective Date,
                                     2.50:1.00; and

                                      C-23
<PAGE>   296

                                     (b) on and after the Merger Effective Date
                                     during the periods set forth below the
                                     following:

<TABLE>
<CAPTION>
                                                   PERIOD                              TOTAL LEVERAGE RATIO
                                                   ------                              --------------------
                                                   <S>                                 <C>
                                                   Merger Effective Date through
                                                     6/29/01.........................       3.00:1.00
                                                   6/30/01 through 12/30/01..........       2.75:1.00
                                                   12/31/01 through 6/29/02..........       2.50:1.00
                                                   6/30/02 and thereafter............       2.00:1.00
</TABLE>

                                     Interest Coverage Ratio -- As of the last
                                     day of each fiscal quarter during the
                                     periods set forth below, the Interest
                                     Coverage Ratio shall exceed the following:

                                     (a) prior to the Merger Effective Date:

<TABLE>
<CAPTION>
                                                   PERIOD                             INTEREST COVERAGE RATIO
                                                   ------                             -----------------------
                                                   <S>                                <C>
                                                   Closing Date through 9/30/00.....         2.00:1.00
                                                   12/31/00 and thereafter..........         2.25:1.00
</TABLE>

                                     (b) on and after the Merger Effective Date:

<TABLE>
<CAPTION>
                                                   PERIOD                             INTEREST COVERAGE RATIO
                                                   ------                             -----------------------
                                                   <S>                                <C>
                                                   Merger Effective Date through
                                                     9/30/01........................         2.00:1.00
                                                   12/31/01 and thereafter..........         2.25:1.00
</TABLE>

                                     Pro Forma Debt Service Coverage Ratio -- As
                                     of the last day of each fiscal quarter, the
                                     Pro Forma Debt Service Coverage Ratio shall
                                     exceed 1.25:1.00.

                                     Fixed Charge Coverage Ratio -- Commencing
                                     June 30, 2001, as of the last day of each
                                     fiscal quarter, the Fixed Charge Coverage
                                     Ratio shall exceed 1.00:1.00.

                                     Minimum Net Revenues -- As of the last day
                                     of each full fiscal quarter during the
                                     period from Merger Effective Date until the
                                     last day of the fiscal quarter ending on
                                     the second anniversary thereof (or if such
                                     anniversary is not the last day of a fiscal
                                     quarter, the last day of the fiscal quarter
                                     in which such anniversary occurs), the net
                                     revenues of the Borrower and its
                                     Subsidiaries on a consolidated basis for
                                     such fiscal quarter shall be greater than
                                     $325,000,000.

                                     Maximum Capital Expenditures -- Capital
                                     Expenditures made or obligated to be made
                                     in respect of each fiscal quarter set forth
                                     below shall not exceed the amount set forth
                                     below with respect to such fiscal quarter:

<TABLE>
<CAPTION>
                                                FISCAL QUARTER ENDING                      AMOUNT
                                                ---------------------                    -----------
                                                <S>                                      <C>
                                                9/30/00................................  $75,000,000
                                                12/31/00...............................  $75,000,000
                                                3/31/01................................  $70,000,000
</TABLE>

                                       Capital Expenditures shall be calculated
                                       on a non-cumulative basis so that amounts
                                       not used in a fiscal quarter may not be
                                       carried over and used in a subsequent
                                       fiscal quarter.

                                      C-24
<PAGE>   297

OTHER COVENANTS:                     Customary affirmative and negative
                                     covenants for the type of transaction
                                     proposed, in each case (except where
                                     otherwise provided) to be applied to Arch
                                     and its Subsidiaries, including, without
                                     limitation, the periodic delivery of
                                     financial statements and other information;
                                     the payment and performance of taxes and
                                     other material obligations; the maintenance
                                     of existence, qualification, good standing,
                                     properties, licenses and insurance;
                                     compliance with environmental and other
                                     laws, regulations and material agreements;
                                     and the following:

                                     Limitations on Liens -- Arch and its
                                     Subsidiaries will not incur any liens,
                                     except (i) existing liens securing
                                     specified Indebtedness as set forth on a
                                     schedule to the Credit Agreement, (ii)
                                     liens for capital leases, taxes,
                                     assessments or governmental charges,
                                     mechanics, carriers, warehousemen or
                                     materialmen arising in the ordinary course
                                     of business not yet not delinquent or, if
                                     delinquent, being contested in good faith
                                     and by appropriate proceedings diligently
                                     conducted and for which such reserve or
                                     other appropriate provision as shall be
                                     required by the Borrower's accountants in
                                     accordance with GAAP shall have been made,
                                     (iii) liens created or existing under the
                                     Credit Agreement and the collateral
                                     documents executed in connection therewith,
                                     (iv) equal and ratable liens in favor of
                                     the Collateral Agents in the Collateral
                                     (other than the Existing API Collateral and
                                     the Existing PageNet Collateral) as
                                     described in paragraph 3 of "Security"
                                     above, (v) liens on property existing on
                                     the Merger Effective Date under the
                                     Canadian credit facilities of PageNet's
                                     Canadian Subsidiaries provided that such
                                     liens do not extend to any other property
                                     of the Borrower and its Subsidiaries, and
                                     (vi) other liens securing Indebtedness
                                     (including purchase money obligations) of
                                     the Borrower and the Subsidiary Guarantors
                                     not exceeding 2.5% of Maximum Permitted
                                     Indebtedness.

                                     Limitation on Indebtedness -- Arch and its
                                     Subsidiaries will not incur any
                                     Indebtedness, except:

                                          Indebtedness arising under the Credit
                                          Facilities,

                                          Indebtedness of Arch arising under the
                                          Arch Senior Notes,

                                          Indebtedness under intercompany notes,

                                          existing Indebtedness as set forth on
                                          a schedule to the Credit Agreement,

                                          prior to the Existing Arch Senior Note
                                          Termination Date, unsecured
                                          Indebtedness (A) between the Borrower
                                          and Arch, provided that written notice
                                          thereof is given 120 days prior
                                          thereto and (B) among the Borrower and
                                          its Subsidiaries (other than Benbow
                                          Investments until such time as Benbow
                                          Investments

                                      C-25
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                                          ceases to be an Unrestricted
                                          Subsidiary under and as defined in the
                                          Arch Indentures, has become a
                                          Subsidiary Guarantor and has granted a
                                          security interest to the Collateral
                                          Agents in its assets),

                                          on and after the Existing Arch Senior
                                          Note Termination Date, unsecured and
                                          subordinated Indebtedness (i) between
                                          the Borrower and Arch, (ii) between
                                          the Borrower and any Subsidiary
                                          Guarantor, and (iii) between any
                                          Subsidiary Guarantor and any other any
                                          Subsidiary Guarantor which shall be
                                          subordinated to the Borrower's or such
                                          Subsidiary Guarantor's obligations
                                          under the Credit Facilities on terms
                                          and conditions acceptable to the
                                          Administrative Agent and the Required
                                          Lenders ("Intercompany Subordinated
                                          Debt"),

                                          Indebtedness of the Borrower in
                                          respect of a subordinated promissory
                                          note (the "ACE Subordinated Note"),
                                          made by ACE (the Borrower's
                                          predecessor) to The Westlink Company
                                          II (subsequently merged into Benbow
                                          Investments, Inc.), in a principal
                                          amount not in excess of $50,000,000,

                                          (i) prior to the Existing Arch Senior
                                          Note Termination Date, Contingent
                                          Obligations of Arch, the Borrower or
                                          any Subsidiary of the Borrower (other
                                          than Benbow Investments until such
                                          time as Benbow Investments ceases to
                                          be an Unrestricted Subsidiary under
                                          and as defined in the Arch Indentures,
                                          has become a Subsidiary Guarantor and
                                          has granted a security interest to the
                                          Collateral Agents in its assets)
                                          incurred to, or for the benefit of,
                                          Arch, the Borrower or any of its
                                          Subsidiaries (other than Benbow
                                          Investments until such time as Benbow
                                          Investments ceases to be an
                                          Unrestricted Subsidiary under and as
                                          defined in the Arch Indentures, has
                                          become a Subsidiary Guarantor and has
                                          granted a security interest to the
                                          Collateral Agents in its assets) and
                                          (ii) on and after the Arch Senior Note
                                          Termination Date, guarantees by the
                                          Borrower of Indebtedness of any
                                          Subsidiary Guarantor, by any
                                          Subsidiary Guarantor of Indebtedness
                                          of the Borrower and by any Subsidiary
                                          Guarantor of Indebtedness of any other
                                          Subsidiary Guarantor, provided that
                                          the Indebtedness would be permitted
                                          under Covenant 2 above if it was
                                          directly incurred,

                                          on and after the Merger Effective
                                          Date, Indebtedness (including, without
                                          duplication, guaranties) of PageNet's
                                          Canadian Subsidiaries in an aggregate
                                          principal amount not in excess of (A)
                                          in the case of the Paging Network of
                                          Canada, Inc. credit facility, Canadian
                                          $64,350,000, (B) in the case of the
                                          Madison Telecommunications Holdings,
                                          Inc. credit facility, Canadian
                                          $28,500,000, and (C) without
                                          duplication, the
                                      C-26
<PAGE>   299

                                          guaranties thereof by PageNet and its
                                          Subsidiaries which are in effect on
                                          the Merger Effective Date, and

                                          other Indebtedness of the Borrower and
                                          the Subsidiary Guarantors (including
                                          purchase money and capitalized lease
                                          obligations and Indebtedness in
                                          respect of non-competition agreements)
                                          not exceeding 2.5% of Maximum
                                          Permitted Indebtedness.

                                          Limitation on Investments -- The
                                          Borrower and its Subsidiaries shall
                                          not make any investments, loans or
                                          other advances other than:

                                          investments in cash equivalents and
                                          investments existing at closing (as
                                          set forth on a schedule to the Credit
                                          Agreement),

                                          prior to the Existing Arch Senior Note
                                          Termination Date, loans or advances by
                                          the Borrower or any of its
                                          Subsidiaries to Arch, the Borrower or
                                          any of its Subsidiaries (other than
                                          Benbow Investments until such time as
                                          Benbow Investments ceases to be an
                                          Unrestricted Subsidiary under and as
                                          defined in the Arch Indentures, has
                                          become a Subsidiary Guarantor and has
                                          granted a security interest to the
                                          Collateral Agents in its assets),

                                          investments by the Borrower in Benbow
                                          Investments consisting solely of the
                                          ACE Subordinated Note,

                                          Investments by the Borrower or any
                                          Subsidiary Guarantor in Intercompany
                                          Subordinated Debt, provided, however,
                                          that (A) any such loan is evidenced by
                                          a subordinated promissory note in form
                                          and substance satisfactory to the
                                          Administrative Agent which is
                                          delivered to the Appropriate Party
                                          under the applicable Collateral
                                          Document, and (B) no default or event
                                          of default would exist before or after
                                          giving effect thereto;

                                          investments ("Additional Benbow
                                          Investments") by Benbow Investments in
                                          Benbow, provided that (i) immediately
                                          before and after giving effect to any
                                          such Additional Benbow Investment, no
                                          default or event of default shall
                                          exist, (ii) prior to the Existing Arch
                                          Senior Note Termination Date, the
                                          amount of such Additional Benbow
                                          Investments (exclusive of Parent
                                          common Stock contributed to Benbow
                                          Investments and advanced by Benbow
                                          Investments to Benbow to enable Benbow
                                          to satisfy its obligations under the
                                          Page Call Purchase Agreement or to
                                          satisfy the Parent's guaranty thereof)
                                          shall not exceed $10,000,000 in the
                                          aggregate in any one fiscal year of
                                          the Borrower and $25,000,000 in the
                                          aggregate for all such Additional
                                          Benbow Investments and provided
                                          further that the amount of such
                                          Additional Benbow

                                      C-27
<PAGE>   300

                                          Investments shall in no event exceed
                                          the amount required to be paid by
                                          Benbow Investments to June Walsh
                                          pursuant to the Purchase Agreement,
                                          dated as of June 24, 1999, among the
                                          Parent, Benbow, Benbow Investments and
                                          June Walsh (the "Benbow Purchase
                                          Agreement") plus the amount required
                                          to be advanced by Benbow Investments
                                          to Benbow to enable Benbow to make
                                          payments to Lisa-Gaye Shearing under
                                          the Page Call Purchase Documents, and
                                          (ii) on and after the Existing Arch
                                          Senior Note Termination Date,
                                          Additional Benbow Investments may be
                                          made so long as before and after
                                          giving effect thereto, the API
                                          Leverage Ratio is less than or equal
                                          to 2:00:1.00 provided that the amount
                                          of such Additional Benbow Investments
                                          shall in no event exceed the amount
                                          required to be paid by Benbow
                                          Investments to June Walsh pursuant to
                                          the Benbow Purchase Agreement plus the
                                          amount required to be advanced by
                                          Benbow Investments to Benbow to enable
                                          Benbow to make payments to Lisa-Gaye
                                          Shearing under the Page Call Purchase
                                          Documents,

                                          payments by the Borrower in respect of
                                          the ACE Subordinated Note, provided
                                          that (i) no default or event of
                                          default would exist and be continuing
                                          immediately before and after giving
                                          effect thereto, (ii) the amount of any
                                          such payment shall not exceed the
                                          amount of Additional Benbow
                                          Investments permitted to be made to
                                          Benbow pursuant clause (e) above as of
                                          the date such payment is made, and
                                          (iii) the proceeds of any such payment
                                          shall be used promptly and solely as
                                          an Additional Benbow Investment;

                                          other investments, provided that (i)
                                          no default or event of default shall
                                          exist before and after giving effect
                                          thereto, (ii) the Borrower shall have
                                          delivered the required annual and
                                          quarterly financial statements that
                                          demonstrate that the Total Leverage
                                          Ratio has been less than 3.00:1:00 for
                                          the immediately preceding two
                                          consecutive fiscal quarters, and (iii)
                                          the Total Leverage Ratio would be less
                                          than or equal to 3.00:1.00 after
                                          giving effect thereto,

                                          Investments consisting of intercompany
                                          notes, and

                                          the Merger Transactions upon
                                          satisfaction of the conditions set
                                          forth under the headings "Conditions
                                          Precedent to Merger" and, if
                                          applicable, "Additional Conditions
                                          Precedent -- Bankruptcy Proceeding",
                                          above.

                                          Limitation on the Sale/Exchange of
                                          Assets -- Arch and its Subsidiaries
                                          may not sell, assign, exchange, lease
                                          or otherwise dispose of any assets,
                                          except (i) sales, assignments,
                                          exchanges, leases or other

                                      C-28
<PAGE>   301

                                         dispositions of property in the
                                         ordinary course of business, (ii) prior
                                         to the Existing Arch Senior Note
                                         Termination Date, sales or other
                                         dispositions of property between Arch,
                                         the Borrower or any Subsidiary of Arch,
                                         provided that written notice thereof is
                                         given 120 days prior thereto, (iii)
                                         other sales, assignments, exchanges,
                                         leases or other dispositions not
                                         exceeding $25,000,000 individually or
                                         $50,000,000 collectively during any 24
                                         month period; provided, however, that
                                         both before and after giving effect
                                         thereto (a) no default or event of
                                         default shall exist, and (b) the
                                         proceeds derived therefrom are used to
                                         prepay loans as described in Mandatory
                                         Prepayments, above;

                                          Limitation on Acquisitions -- The
                                          Parent and its Subsidiaries may not
                                          make acquisitions (other than the
                                          Merger pursuant to the terms contained
                                          herein) except that the Borrower and
                                          its Subsidiaries may make
                                          acquisitions, provided (i) both before
                                          and after giving effect to any
                                          acquisition no default or event of
                                          default exists, (ii) acquisitions are
                                          limited to the wireless messaging
                                          industry, (iii) such acquisitions do
                                          not exceed $25,000,000 individually or
                                          $50,000,000 collectively during any 24
                                          month period, (iv) the Total Leverage
                                          Ratio is less than or equal to
                                          4.75:1.00 both before and after such
                                          acquisition and (v) the API Leverage
                                          Ratio is less than or equal to
                                          2.50:1.00 both before and after such
                                          acquisition;

                                          Restricted Payments -- Prohibition on
                                          distributions, including dividends and
                                          other restricted payments ("Restricted
                                          Payments"), except:

                                          Prior to the Existing Arch Senior Note
                                          Termination Date -- Prior to the
                                          Existing Arch Senior Note Termination
                                          Date, whether or not any of the Parent
                                          Discount Notes are outstanding or the
                                          Parent Discount Notes Indenture is in
                                          effect, the following Restricted
                                          Payments shall be permitted:

                                          (i)   any Subsidiary of Arch may,
                                                directly or indirectly, make
                                                Restricted Payments to Arch, the
                                                Borrower or any of its
                                                Subsidiaries (other than Benbow
                                                Investments until such time as
                                                Benbow Investments ceases to be
                                                an Unrestricted Subsidiary under
                                                and as defined in the Arch
                                                Indentures, has become a
                                                Subsidiary Guarantor and has
                                                granted a security interest to
                                                the Collateral Agents in its
                                                assets), provided that with
                                                respect to any Restricted
                                                Payment to Arch written notice
                                                thereof is given 120 days prior
                                                thereto (other than with respect
                                                to a Restricted Payment to Arch
                                                on a day on which Arch is
                                                obligated to make a payment in
                                                respect of Required Obligations
                                                so long as the amount
                                      C-29
<PAGE>   302

                                            thereof does not exceed the amount
                                            of the Required Obligation payable
                                            on such date);

                                          (ii)  Arch and its Subsidiaries may
                                                make Restricted Payments to the
                                                Parent for purposes of enabling
                                                the Parent, as a consolidated
                                                taxpayer to pay taxes, pursuant
                                                to the terms set forth in the
                                                Tax Sharing Agreement;

                                          (iii) the Borrower and its
                                                Subsidiaries may pay management
                                                fees to Arch in any fiscal
                                                quarter (in an aggregate amount
                                                not exceeding 1.5% of the net
                                                revenue of Arch and its
                                                Subsidiaries for the immediately
                                                preceding four fiscal quarters
                                                ending with the latest fiscal
                                                quarter for which Arch has filed
                                                a quarterly report with the SEC
                                                on form 10-Q or an annual report
                                                on form 10-K) in accordance with
                                                the terms set forth in the
                                                Management Agreement for
                                                services rendered to the
                                                Borrower or any of its
                                                Subsidiaries, provided that (i)
                                                no default or event of default
                                                has occurred or is continuing
                                                (provided that during the
                                                continuance of a default or an
                                                event of default, the management
                                                fee may be accrued, but not
                                                paid) and (ii) any such
                                                management fee accrued or paid
                                                shall be treated as an operating
                                                expense and deducted from the
                                                calculation of Operating Cash
                                                Flow of the Borrower; and

                                          (iv) provided that no default or event
                                               of default shall exist both
                                               before and after giving effect
                                               thereto, after the Borrower has
                                               delivered the required annual and
                                               quarterly financial statements
                                               that demonstrate that the Total
                                               Leverage Ratio has been less than
                                               3.00:1:00 for the immediately
                                               preceding two consecutive fiscal
                                               quarters, and provided that the
                                               Total Leverage Ratio would be
                                               less than or equal to 3.00:1.00
                                               after giving effect thereto, (A)
                                               Arch may make any Restricted
                                               Payments to the Parent, and (B)
                                               the Parent may make any
                                               Restricted Payments to its
                                               shareholders.

                                          On and After the Existing Arch Senior
                                          Note Termination Date -- On and after
                                          the Existing Arch Senior Note
                                          Termination Date, whether or not any
                                          of the Parent Discount Notes are
                                          outstanding or the Parent Discount
                                          Notes Indenture is in effect, the
                                          following Restricted Payments shall be
                                          permitted:

                                          (i)   any Subsidiary of the Borrower
                                                may make a Restricted Payment to
                                                its parent;

                                          (ii)  provided that no default or
                                                event of default shall exist
                                                both before and after giving
                                                effect thereto,

                                      C-30
<PAGE>   303

                                            a Subsidiary of Arch may make a
                                            Restricted Payment (other than any
                                            payment under the Tax Sharing
                                            Agreement or the Management
                                            Agreement) to Arch (A) on a day on
                                            which Arch is obligated to make a
                                            payment in respect of Required
                                            Obligations so long as the amount
                                            thereof does not exceed the amount
                                            of the Required Obligation payable
                                            on such date, and (B) for any other
                                            purpose so long as after giving
                                            effect thereto, the API Leverage
                                            Ratio does not exceed 2.00:1.00;

                                          (iii) Arch and its Subsidiaries may
                                                make Restricted Payments to the
                                                Parent for purposes of enabling
                                                the Parent, as a consolidated
                                                taxpayer to pay taxes, pursuant
                                                to the terms set forth in the
                                                Tax Sharing Agreement;

                                          (iv) the Borrower and its Subsidiaries
                                               may pay Management Fees to Arch
                                               in any fiscal quarter (in an
                                               aggregate amount not exceeding
                                               1.5% of the net revenue of arch
                                               and its Subsidiaries for the
                                               immediately preceding four fiscal
                                               quarters ending with the latest
                                               fiscal quarter for which Arch has
                                               filed a quarterly report with the
                                               SEC on form 10-Q or an annual
                                               report on form 10-K) in
                                               accordance with the terms set
                                               forth in the Management Agreement
                                               for services rendered to the
                                               Borrower or any of its
                                               Subsidiaries, provided that (i)
                                               no default or event of default
                                               has occurred or is continuing
                                               (provided that during the
                                               continuance of a default or an
                                               event of default, the management
                                               fee may be accrued, but not paid)
                                               and (ii) any such management fee
                                               accrued or paid shall be treated
                                               as an operating expense and
                                               deducted from the calculation of
                                               Operating Cash Flow of the
                                               Borrower; and

                                          (v)  provided that no default or event
                                               of default shall exist both
                                               before and after giving effect
                                               thereto, after the Borrower has
                                               delivered the required annual and
                                               quarterly financial statements
                                               that demonstrate that the Total
                                               Leverage Ratio has been less than
                                               3.00:1:00 for the immediately
                                               preceding two consecutive fiscal
                                               quarters, and provided that the
                                               Total Leverage Ratio would be
                                               less than 3.00:1.00 after giving
                                               effect thereto, (A) Arch may make
                                               any Restricted Payments to the
                                               Parent, and (B) the Parent may
                                               make any Restricted Payments to
                                               its shareholders.

                                          Additional Restricted Payments to the
                                          Parent -- So long as any of the Parent
                                          Discount Notes are outstanding or the
                                          Parent Discount Notes Indenture is

                                      C-31
<PAGE>   304

                                         in effect, and provided that
                                         immediately before or after giving
                                         effect to such declaration and payment
                                         no default or event of default shall
                                         exist, in addition to any payments
                                         permitted under clauses (a) and (b)
                                         above, Arch may make Restricted
                                         Payments to the Parent (A) on any day
                                         in an amount not in excess of the
                                         amount of interest due and payable on
                                         the Parent Discount Notes on such day,
                                         (B) to enable the Parent to repurchase
                                         shares of its Stock in an aggregate
                                         amount not exceeding $1,000,000 minus
                                         amounts expended for such purpose on or
                                         after March 12, 1996 and (C) to enable
                                         the Parent to make payments (not
                                         exceeding $189,282 in any fiscal year)
                                         when due under the Consulting Agreement
                                         with Lisa Gaye Shearing.

                                    Prohibition on Mergers or other Fundamental
                                    Changes -- except that:

                                          prior to the Existing Arch Senior Note
                                          Termination Date, Arch, the Borrower
                                          or any of its Subsidiaries (other than
                                          Benbow Investments until such time as
                                          Benbow Investments ceases to be an
                                          Unrestricted Subsidiary under and as
                                          defined in the Arch Indentures, has
                                          become a Subsidiary Guarantor and has
                                          granted a security interest to the
                                          Collateral Agents in its assets) may
                                          merge or consolidate with, or transfer
                                          all or substantially all of its assets
                                          to, Arch, the Borrower or any of its
                                          Subsidiaries (other than Benbow
                                          Investments until such time as Benbow
                                          Investments ceases to be an
                                          Unrestricted Subsidiary under and as
                                          defined in the Arch Indentures, has
                                          become a Subsidiary Guarantor and has
                                          granted a security interest to the
                                          Collateral Agents in its assets),
                                          provided that (i) written notice
                                          thereof is given 120 days prior
                                          thereto and (ii) in any merger
                                          involving the Borrower, the Borrower
                                          shall be the survivor,

                                          on and after the Existing Arch Senior
                                          Note Termination Date, the Borrower or
                                          any Subsidiary Guarantor may merge or
                                          consolidate with, or transfer all or
                                          substantially all of its assets to,
                                          the Borrower or any such Subsidiary
                                          Guarantor, provided that (A) the
                                          Administrative Agent shall have
                                          received ten days' prior written
                                          notice thereof, (B) immediately before
                                          and after giving effect thereto no
                                          default or event of default shall
                                          exist and (C) in any merger involving
                                          the Borrower, the Borrower shall be
                                          the survivor,

                                          at all times, mergers involving
                                          Subsidiaries of the Borrower as part
                                          of an Acquisition permitted by
                                          Covenant 5, and

                                          the Merger, provided that the
                                          conditions thereto set forth in this
                                          Term Sheet have been satisfied.

                                      C-32
<PAGE>   305

ADDITIONAL COVENANTS APPLICABLE
TO THE PARENT:                       Customary affirmative and negative
                                     covenants for the type of transaction
                                     proposed, including, without limitation:
                                     (i) a limitation of the Parent's business
                                     and activities to the ownership of Arch and
                                     certain activities directly related
                                     thereto, (ii) a prohibition on incurring,
                                     assuming or creating any Indebtedness other
                                     than in respect of its guaranty of the
                                     Credit Facility, the Parent Discount Notes
                                     and its existing convertible subordinated
                                     notes, (iii) a limitation on its
                                     investments to investment grade securities
                                     and certain other investments which shall
                                     be satisfactory to the Administrative
                                     Agent, (iv) a prohibition against the
                                     issuance of any Stock other than common
                                     Stock and other perpetual Stock, provided
                                     that no such Stock shall provide for
                                     mandatory dividends (except for dividends
                                     payable solely in such Stock), mandatory
                                     redemptions or other similar payments,
                                     including, without limitation, the Series D
                                     and Series E Preferred Stock of the Parent
                                     to be issued in exchange for Parent
                                     Discount Notes, and (v) an affirmative
                                     covenant providing that immediately after
                                     the consummation of the Merger, the Parent
                                     shall contribute all of the Stock of
                                     PageNet to the Borrower.

EVENTS OF DEFAULT:                   Customary for the type of transaction
                                     proposed, including, without limitation,
                                     nonpayment of principal, interest or other
                                     fees when due; breach of representations,
                                     warranties or covenants; breach of other
                                     material agreements; material undischarged
                                     judgments; bankruptcy or insolvency; change
                                     of control; and, cross default to other
                                     Indebtedness (including mandatory
                                     redemption of Existing Notes or Replacement
                                     Notes) of the Borrower, the Parent and Arch
                                     in excess of $10,000,000.

REQUIRED LENDERS:                    Lenders having more than (a) 50% of
                                     Tranches A, B, B-1 and C, taken as a whole
                                     and (b) 50% of Tranches A, B and C, taken
                                     as a whole.

MISCELLANEOUS:                       Customary for the type of transaction
                                     proposed and others to be reasonably
                                     specified by the Managing Agents,
                                     including, without limitation, the
                                     following:

                                     1. Standard provisions for illegality,
                                        inability to determine rate,
                                        indemnification for break funding and
                                        increased costs or reduced return
                                        including, without limitation, those
                                        arising from reserve requirements, taxes
                                        and capital adequacy.

                                     2. Amendments and waivers will be permitted
                                        with the consent of Required Lenders,
                                        provided, however, that amendments and
                                        waivers relating to interest rates,
                                        fees, payment amounts and dates and
                                        releases of any security shall require
                                        the consent of all Lenders;

                                     3. The Lenders will be permitted to sell
                                        assignments and participations in loans,
                                        notes, and commitments with, in the case
                                        of assignments to Persons other than
                                        existing

                                      C-33
<PAGE>   306

                                       Lenders or their affiliates, the consent
                                       of the Borrower, the Administrative Agent
                                       and the Letter of Credit Issuing Bank,
                                       provided, however, (i) such consents
                                       shall not be unreasonably withheld and,
                                       in the case of the consent of the
                                       Borrower, not be required during the
                                       continuance of an Event of Default and
                                       (ii) the assignor or the assignee pays a
                                       service fee to the Administrative Agent
                                       of $3,500 for each assignment;

                                     4. Standard provisions for indemnification
                                        of the Managing Agents, the
                                        Administrative Agent, the Letter of
                                        Credit Issuing Bank, BNY, as a
                                        Collateral Agent, the Bank Collateral
                                        Agent, and the Security Agent, each of
                                        the Lenders and each of their respective
                                        affiliates, directors, officers, agents
                                        and employees; and

                                     5. The Borrower will pay all reasonable
                                        legal fees and other reasonable
                                        out-of-pocket expenses of the Managing
                                        Agents in connection with the
                                        transactions contemplated hereby whether
                                        or not consummated.

                                      C-34
<PAGE>   307

                             APPENDIX A TO ANNEX C

                                  DEFINITIONS

     "Adjusted Indenture Maturity Date" means the earlier to occur of (i) if the
Arch 9 1/2% Indenture is in effect, August 1, 2003, and (ii) if the Arch 14%
Indenture is in effect, May 1, 2004.

     "Aggregate Tranche B Percentage" means, on any date of determination, the
percentage equal to a fraction (i) the numerator of which is the sum of (1) the
aggregate outstanding principal amount of the Tranche B Loans on such date, plus
(2) (A) prior to the termination (or other nonexistence) of the Aggregate
Tranche A Commitments, the Aggregate Tranche A Commitments on such date, and (B)
on and after the termination (or other nonexistence) of the Aggregate Tranche A
Commitments, the Aggregate Tranche A Exposure on such date, and (ii) the
denominator of which is the sum of (1) the amount determined under clause (i) of
this definition on such date, plus (2) the aggregate outstanding principal
amount of the Tranche B-1 Loans on such date, plus (3) the aggregate outstanding
principal amount of the Tranche C Loans on such date.

     "Aggregate Tranche B-1 Percentage" means, on any date of determination on
and after the Merger Effective Date, the percentage equal to a fraction (i) the
numerator of which is the aggregate outstanding principal amount of the Tranche
B-1 Loans on such date and (ii) the denominator of which is the sum of (1) the
amount determined under clause (i) of this definition on such date, plus (2) the
aggregate outstanding principal amount of the Tranche B Loans on such date plus
(3) the aggregate outstanding principal amount of the Tranche C Loans on such
date, plus (4) (A) prior to the termination (or other nonexistence) of the
Aggregate Tranche A Commitments, the Aggregate Tranche A Commitments on such
date, and (B) on and after the termination (or other nonexistence) of the
Aggregate Tranche A Commitments, the Aggregate Tranche A Exposure on such date.

     "Aggregate Tranche C Percentage" means, on any date of determination, the
percentage equal to a fraction (i) the numerator of which is the aggregate
unpaid principal balance of the Tranche C Loans on such date, and (ii) the
denominator of which is the sum of (1) the amount determined under clause (i) of
this definition on such date, plus (2), the aggregate outstanding principal
amount of the Tranche B Loans on such date, plus (3), the aggregate outstanding
principal amount of the Tranche B-1 Loans on such date, plus (4) (A) prior to
the termination (or other nonexistence) of the Aggregate Tranche A Commitments,
the Aggregate Tranche A Commitments on such date and (B) on and after the
termination (or other nonexistence) of the Aggregate Tranche A Commitments, the
Aggregate Tranche A Exposure on such date.

     "Annualized Operating Cash Flow" means, as to any Person on any date of
determination, an amount equal to (i) Operating Cash Flow of such Person and its
Subsidiaries (determined on a consolidated basis in accordance with GAAP) for
the fiscal quarter ending on such date or, if such date is not a fiscal quarter
ending date, the immediately preceding fiscal quarter, multiplied by (ii) four.

     "API Debt" means, at any date of determination, the sum of all Indebtedness
of the Borrower and its Subsidiaries, determined on a consolidated basis in
accordance with GAAP.

     "API Leverage Ratio" means, at any date of determination, the ratio of API
Debt to Annualized Operating Cash Flow of the Borrower.

     "Applicable Arch Indenture Trustees" means, at any time, (i) if the Arch
9 1/2% Indenture is in effect and has not been satisfied, defeased or
discharged, United States Trust Company of New York or its successor as trustee
under the Arch 9 1/2% Indenture, and (ii) if the Arch 14% Indenture is in effect
and has not been satisfied, defeased or discharged, United States Trust Company
of New York or its successor as trustee under the Arch 14% Indenture.

     "Arch 14% Indenture" means the Indenture, dated as of December 15, 1994,
between Arch and United States Trust Company of New York or its successor, as
trustee, pursuant to which Arch issued the Arch 14% Senior Notes.

                                       A-1
<PAGE>   308

     "Arch 14% Senior Notes" means the 14% Senior Notes due 2004 issued by Arch
pursuant to the Arch 14% Indenture.

     "Arch Indentures": collectively, the Existing Arch Indentures, the Arch
12 3/4% Indenture, the Arch 13 3/4% Indenture and any Replacement Indenture (if
existing).

     "Arch 9 1/2% Indenture" means the Indenture, dated as of February 7, 1994,
between Arch and United States Trust Company of New York or its successor, as
trustee, pursuant to which Arch issued the Arch 9 1/2% Senior Notes.

     "Arch 9 1/2% Senior Notes" means the 9 1/2% Senior Notes due 2004 issued by
Arch pursuant to the Arch 9 1/2% Indenture.

     "Arch Senior Notes": collectively, the Existing Arch Senior Notes, the Arch
13 3/4% Senior Notes, the Arch 12 3/4% Senior Notes and any Replacement Notes
(if existing).

     "Arch 13 3/4% Indenture" means the Indenture, dated as of April 9, 1999,
between Arch (as successor by merger to Arch Escrow Corp.) and IBJ Whitehall
Bank & Trust Company, or its successor, as trustee, pursuant to which Arch
issued the Arch 13 3/4% Senior Notes.

     "Arch 13 3/4% Senior Notes" means the 13 3/4% Senior Notes due 2008 issued
by Arch pursuant to the Arch 13 3/4% Indenture.

     "Arch 12 3/4% Indenture" means the Indenture, dated as of June 29, 1998,
between Arch and U.S. Bank Trust National Association or its successor, as
trustee, pursuant to which Arch issued the Arch 12 3/4% Senior Notes.

     "Arch 12 3/4% Senior Notes" means the 12 3/4% Senior Notes due 2007 issued
by Arch pursuant to the Arch 12 3/4% Indenture.

     "Bank Collateral Agent": The Bank of New York, in its capacity as
collateral agent under the Borrower Pledge Agreement, the Restricted Subsidiary
Security Agreement and the Amended PageNet Collateral Documents.

     "Benbow Guaranty Date": the earlier to occur of (i) the Existing Arch
Senior Note Termination Date and (ii) the date on which the last to occur of the
following events has occurred: (A) Benbow Investments ceases to be an
Unrestricted Subsidiary under and as defined in each of the Existing Arch
Indentures, (B) the consummation of the pending purchase of June Walsh's
interest in Benbow and (C) the redemption of the Benbow Stock received by
Adelphia Communications Corporation pursuant to the Page Call Purchase Agreement
has been consummated.

     "Capital Expenditures": any expenditures made or costs incurred that are
required or permitted to be capitalized for financial reporting purposes in
accordance with GAAP other than deferred financing fees.

     "Cash Interest Expense": for any period, the sum of (i) cash interest
expense on Total Debt (adjusted to give effect to all Interest Rate Protection
Agreements (including Interest Hedge Agreements (as defined in the Existing
PageNet Credit Agreement) which are assumed by the Borrower) and fees and
expenses paid in connection with the same, all as determined in accordance with
GAAP) during such period as determined in accordance with GAAP, (ii) Commitment
Fees, Letter of Credit Fees and fees in respect of PageNet Letters of Credit
during such period and (iii) without duplication, Restricted Payments made to
the Parent during such period to the extent made to enable the Parent to satisfy
its interest obligations under the Parent Discount Notes Indenture.

     "Collateral Agents": collectively, (i) BNY in its capacity as collateral
agent for the Lenders under the Security and Intercreditor Agreement and (ii)
the Applicable Arch Indenture Trustees in their capacities as collateral agents
for the Existing Arch Senior Noteholders under the Security and Intercreditor
Agreement.

     "Consolidated Total Assets" means, at any date of determination, the total
assets of the Borrower and its Subsidiaries determined on a consolidated basis
in accordance with GAAP as at such date.
                                       A-2
<PAGE>   309

     "Contingent Obligation": as to any Person, any obligation of such Person
guaranteeing or in effect guaranteeing any Indebtedness, leases, dividends or
other obligations ("primary obligations") of any other Person (the "primary
obligor") in any manner, whether directly or indirectly, including any
obligation of such Person, whether or not contingent, (a) to purchase any such
primary obligation or any Property constituting direct or indirect security
therefor, (b) to advance or supply funds (i) for the purchase or payment of any
such primary obligation or (ii) to maintain working capital or equity capital of
the primary obligor or otherwise to maintain net worth, solvency or other
financial statement condition of the primary obligor, (c) to purchase Property,
securities or services primarily for the purpose of assuring the beneficiary of
any such primary obligation of the ability of the primary obligor to make
payment of such primary obligation or (d) otherwise to assure, protect from
loss, or hold harmless the beneficiary of such primary obligation against loss
in respect thereof; provided, however, that the term Contingent Obligation shall
not include the indorsement of instruments for deposit or collection in the
ordinary course of business. The term Contingent Obligation shall also include
the liability of a general partner in respect of the recourse liabilities of the
partnership in which it is a general partner. The amount of any Contingent
Obligation of a Person shall be deemed to be an amount equal to the stated or
determinable amount of the primary obligation in respect of which such
Contingent Obligation is made or, if not stated or determinable, the maximum
reasonably anticipated liability in respect thereof as determined by such Person
in good faith.

     "DIP Facility" means, in the event of the commencement of the Bankruptcy
Proceeding, any debtor in possession financing facility extended by one or more
lenders to PageNet and its Subsidiaries which are debtors in such proceeding.

     "Excess Cash Flow" means, with respect to any fiscal year, Operating Cash
Flow of the Borrower for such fiscal year less the sum of, without duplication
(i) the amount, if positive, equal to (a) the amount of the Tranche A Loans
outstanding at the beginning of such fiscal year minus (b) the Aggregate Tranche
A Commitments at the end of such fiscal year (without giving effect to mandatory
reductions thereof (other than scheduled reductions) during such period, (ii)
payments of the principal of the Tranche B Loans, the Tranche B-1 Loans and the
Tranche C Loans during such fiscal year (other than mandatory prepayments
thereof, (iii) scheduled payments of principal of other Indebtedness of the
Borrower and its Subsidiaries on a consolidated basis made during such fiscal
year (including Indebtedness in respect of Capital Leases), (iv) Capital
Expenditures made by the Borrower and its Subsidiaries on a consolidated basis
during such fiscal year, (v) without duplication, taxes and payments under the
Tax Sharing Agreement paid by the Borrower and its Subsidiaries in cash during
such period, and (vi) Cash Interest Expense for such fiscal year.

     "Existing Arch Indentures" means, collectively, the Arch 9 1/2% Indenture
and the Arch 14% Indenture.

     "Existing Arch Senior Noteholders" means, collectively, the holders of the
Existing Arch Senior Notes.

     "Existing Arch Senior Notes" means, collectively, (i) the 9 1/2% Senior
Notes and (ii) the 14% Senior Notes.

     "Existing Arch Senior Note Termination Date" means the first date on which
none of the Existing Arch Senior Notes remain outstanding and neither of the
Existing Arch Indentures is in effect. For purposes of this definition, the
Existing Arch Senior Notes issued under an Existing Arch Indenture shall no
longer be deemed to be outstanding and such Existing Arch Indenture shall no
longer be deemed to be in effect if Arch has elected in accordance with the
provisions of such Existing Arch Indenture to have the defeasance and discharge
or covenant defeasance provisions thereof apply and has complied with the
requirements thereof.

     "Fixed Charge Coverage Ratio" means, as of the last day of any fiscal
quarter, the ratio of (i) Annualized Operating Cash Flow to (ii) Fixed Charges
for the Four Quarter Trailing Period.

                                       A-3
<PAGE>   310

     "Fixed Charges" means for any period, the sum of (i) scheduled payments of
principal on Total Debt made or required to be made during such period, (ii) the
amount, if positive, equal to (a) the amount of the Tranche A Loans outstanding
at the beginning of such period minus (b) the Aggregate Tranche A Commitments at
the end of such period (without giving effect to reductions thereof during such
period required as a result of asset sales, the receipt of insurance proceeds or
condemnation awards or the receipt of a breakup or similar fee), (iii) Capital
Expenditures made by Arch and its Subsidiaries on a consolidated basis during
such period, (iv) payments under Capital Leases made or required to be made by
Arch and its Subsidiaries on a consolidated basis during such period, (v)
without duplication, taxes and payments under the Tax Sharing Agreement, in each
case paid or required to be paid in cash made by Arch and its Subsidiaries on a
consolidated basis during such period, and (vi) Cash Interest Expense.

     "Foreign Subsidiary" means any Subsidiary that is a "controlled foreign
corporation" within the meaning of Section 957 of the Internal Revenue Code.

     "Four Quarter Trailing Period" means, at any date of determination, the
period of the four fiscal quarters ending on such date, or, if such date is not
the last day of a fiscal quarter, the period of the most immediately completed
four fiscal quarters.

     "Indebtedness" means, as to any Person, at a particular time, all items
which constitute, without duplication, (i) Indebtedness for borrowed money or
the deferred purchase price of Property (other than trade payables incurred in
the ordinary course of business), (ii) Indebtedness evidenced by notes, bonds,
debentures or similar instruments, (iii) obligations with respect to any
conditional sale or title retention agreement, (iv) Indebtedness arising under
acceptance facilities and the amount available to be drawn under all letters of
credit issued for the account of such Person and, without duplication, all
drafts drawn thereunder to the extent such Person shall not have reimbursed the
issuer in respect of the issuer's payment of such drafts, (v) all liabilities
(excluding liabilities under Secured Hedging Agreements) secured by any Lien on
any Property owned by such Person even though such Person has not assumed or
otherwise become liable for the payment thereof (other than carriers',
warehousemen's, mechanics', repairmen's or other like non-consensual Liens
arising in the ordinary course of business), (vi) obligations under Capital
Leases, (vii) all Contingent Obligations and (viii) obligations under the
Non-Competition Agreements.

     "Loan Parties" -- means, collectively, the Borrower and the Guarantors.

     "Interest Coverage Ratio": as of the last day of (i) any fiscal quarter
occurring on or before the Merger Effective Date and the fiscal quarter in which
the Merger Effective Date occurs, the ratio of Operating Cash Flow of the
Borrower to Cash Interest Expense, in each case for the Four Quarter Trailing
Period, (ii) the first full fiscal quarter ending after the Merger Effective
Date, the ratio of Operating Cash Flow of the Borrower to Cash Interest Expense
in each case for such fiscal quarter, (iii) the second full fiscal quarter
ending after the Merger Effective Date, the ratio of Operating Cash Flow of the
Borrower to Cash Interest Expense, in each case for the first and second full
fiscal quarters ending after the Merger Effective Date, (iv) the third full
fiscal quarter ending after the Merger Effective Date, the ratio of Operating
Cash Flow of the Borrower to Cash Interest Expense in each case for the first,
second and third full fiscal quarters ending after the Merger Effective Date,
and (v) the fourth full fiscal quarter ending after the Merger Effective Date
and each fiscal quarter thereafter, the ratio of Operating Cash Flow of the
Borrower to Cash Interest Expense for the Four Quarter Trailing Period.

     "Management Agreement" means the Amended and Restated Management Services
Agreement, dated as of June 29, 1998, by and among Arch and its Subsidiaries.

     "Material Foreign Subsidiary" means, as to any Person, a Foreign Subsidiary
of such Person which, as of the last day of the most recently completed fiscal
quarter, satisfied any one or more of the following three tests: (i) the
Borrower and its other Subsidiaries' investments in and advances made on or
after the Closing Date (or, in the case of a PageNet Canadian Subsidiary, the
Merger Effective Date) to (x) such Foreign Subsidiary and its Subsidiaries
exceed $15,000,000 in the aggregate or (y) all Foreign Subsidiaries which are
not Subsidiary Guarantors exceeds $25,000,000 in the aggregate, (ii) the
Borrower and its other

                                       A-4
<PAGE>   311

Subsidiaries' proportionate share of Consolidated Total Assets (after
intercompany eliminations) consisting of the Property of such Foreign Subsidiary
exceeds 5% of Consolidated Total Assets or (iii) the Borrower and the other
Subsidiaries' equity in the income (not to include losses) from continuing
operations before income taxes, extraordinary items and the cumulative effect of
a change in accounting principles of such Foreign Subsidiary exceeds 5% of the
income (not to include losses) from continuing operations before income taxes,
extraordinary items and the cumulative effect of a change in accounting
principles of the Borrower and its Subsidiaries determined on a consolidated
basis in accordance with GAAP. Notwithstanding the foregoing, a PageNet Canadian
Subsidiary that is a party to one or more of the PageNet Canadian Loan Documents
shall not be a Material Foreign Subsidiary by reason of the satisfaction of the
tests set forth in clause (ii) or (iii) of the preceding sentence until the
PageNet Canadian Loan Documents to which it is a party have been terminated.

     "Maximum Permitted Indebtedness" means, on any date of determination, the
maximum Total Leverage Ratio permitted on such date multiplied by Annualized
Operating Cash Flow.

     "Minority Lenders" means, on any date of determination, Lenders under this
Agreement having Tranche A Commitments (or, if no Tranche A Commitments are in
effect, Tranche A Exposure), Tranche B Loans and Tranche C Loans aggregating not
less than 40% of the sum of (i) the Aggregate Tranche A Commitments (or, if no
Tranche A Commitments are in effect, Aggregate Tranche A Exposure), (ii) the
aggregate outstanding principal balance of the Tranche B Loans, and (iii) the
aggregate outstanding principal balance of the Tranche C Loans.

     "Operating Cash Flow" means as to any Person for any period, total revenue
of such Person and its Subsidiaries on a consolidated basis for such period,
determined in accordance with GAAP, without giving effect to extraordinary gains
and losses from sales, exchanges and other dispositions of Property not in the
ordinary course of business, and non-recurring items, less the sum of, without
duplication, the following for such Person and its Subsidiaries on a
consolidated basis for such period, determined in accordance with GAAP: (i)
operating expenses (exclusive of depreciation, amortization and other non-cash
items included therein), and (ii) corporate office, general and administrative
expenses (exclusive of depreciation, amortization and other non-cash items
included therein). With respect to the Borrower and its Subsidiaries, any
Management Fees paid or accrued will be treated as an administrative expense.
Solely for purposes of calculating the API Leverage Ratio and the Total Leverage
Ratio, Operating Cash Flow of the Borrower shall be adjusted on a consistent
basis satisfactory to the Administrative Agent to give pro-forma effect to any
acquisition, sale, exchange or disposition of Property.

     "Parent Discount Noteholders" means, collectively, the holders of Parent
Discount Notes.

     "Parent Discount Notes" means the 10 7/8% Senior Parent Discount Notes, due
2008, issued by the Parent pursuant to the Parent Discount Notes Indenture.

     "Parent Discount Notes Indenture" means the Indenture, dated as of March
12, 1996, between the Parent and IBJ Schroder Bank & Trust Company or its
successor, as trustee, pursuant to which the Parent issued the Parent Discount
Notes.

     "Parent Subordinated Debentures" means the 6 3/4% Convertible Subordinated
Debentures, due 2003, issued by the Parent pursuant to the Parent Subordinated
Indenture.

     "Parent Subordinated Indenture" means the Indenture, dated as of December
1, 1993, between the Parent and BNY or its successor, as trustee, pursuant to
which the Parent issued the Parent Subordinated Debentures.

     "Person" means an individual, a partnership, a corporation, a business
trust, a joint stock company, a trust, an unincorporated association, a joint
venture, a Governmental Body or any other entity of whatever nature.

     "Pricing Leverage Ratio" means (i) prior to the Existing Arch Senior Note
Termination Date, the Total Leverage Ratio, and (ii) at all other times, the API
Leverage Ratio.

                                       A-5
<PAGE>   312

     "Pro-forma Debt Service" means, at any date of determination, the sum of
(i) Cash Interest Expense for the period of the four fiscal quarters immediately
succeeding such date of determination, (ii) all current maturities of all
Indebtedness of Arch and its Subsidiaries (determined on a consolidated basis in
accordance with GAAP) for such four fiscal quarter period and (iii) the amount,
if positive, equal to (a) the amount of the Tranche A Loans outstanding at the
beginning of such period minus (b) the Aggregate Tranche A Commitments at the
end of such period (after giving effect to any mandatory reductions (other than
scheduled reductions during such period). Where any item of interest varies or
depends upon a variable rate of interest (or other rate of interest which is not
fixed for such entire four fiscal quarter period), such rate, for purposes of
calculating Pro-forma Debt Service, shall be assumed to equal the Alternate Base
Rate plus the Applicable Margin in effect on the date of such calculation, or,
if such rate is a Eurodollar Rate, the applicable Eurodollar Rate plus the
Applicable Margin in effect on the date of such calculation. Also, for purposes
of calculating Pro-forma Debt Service, the principal amount of Total Debt
outstanding on the date of any calculation of Pro-forma Debt Service shall be
assumed to be outstanding during the entire four fiscal quarter period
immediately succeeding such date, except to the extent that such Indebtedness is
subject to mandatory payment of principal during such period.

     "Pro-forma Debt Service Coverage Ratio" means, as of the last day of any
fiscal quarter, the ratio of Annualized Operating Cash Flow to Pro-forma Debt
Service as of such date.

     "Replacement Notes" means any senior note issue of Arch in an amount and on
terms and conditions satisfactory to the Required Lenders.

     "Required Lenders": on any date of determination, Lenders satisfying both
clauses (a) and (b) below:

          (a) Lenders having Tranche A Commitments (or, if no Tranche A
     Commitments are in effect, Tranche A Exposure), Tranche B Loans and Tranche
     C Loans aggregating more than 50% of the sum of (i) the Aggregate Tranche A
     Commitments (or, if no Tranche A Commitments are in effect, Aggregate
     Tranche A Exposure), (ii) the aggregate outstanding principal balance of
     the Tranche B Loans, and (iii) the aggregate outstanding principal balance
     of the Tranche C Loans, and

          (b) Lenders having Tranche A Commitments (or, if no Tranche A
     Commitments are in effect, Tranche A Exposure), Tranche B Loans, Tranche
     B-1 Loans and Tranche C Loans aggregating more than 50% of the sum of (i)
     the Aggregate Tranche A Commitments (or, if no Tranche A Commitments are in
     effect, Aggregate Tranche A Exposure), (ii) the aggregate outstanding
     principal balance of the Tranche B Loans, (iii) the aggregate outstanding
     principal balance of the Tranche B-1 Loans and (iv) the aggregate
     outstanding principal balance of the Tranche C Loans.

     "Required Obligations" means, on any date, interest due and payable on such
date on the Arch Senior Notes.

     "Restricted Payment": as to any Person, (i) the payment or declaration by
such Person of any dividend on any class of Stock (other than dividends payable
solely in common Stock of the such Person or other Stock to the extent the same
is permitted to be issued pursuant to the Credit Agreement), or warrants, rights
or options to acquire common Stock of such Person (or other Stock to the extent
the same is permitted to be issued pursuant to the Credit Agreement) or the
making of any other distribution on account of any class of its Stock, (ii) the
retirement, redemption, purchase or acquisition, directly or indirectly, of (a)
any shares of the Stock of such Person (except shares acquired solely upon the
conversion thereof into other shares of its Stock) and (b) any security
convertible into, or any option, warrant or other right to acquire, shares of
the Stock of such Person, or (iii) the payment of any management fees or any
payment under the Tax Sharing Agreement or the Management Agreement.

     "Security Agent": The Bank of New York, in its capacity as security agent
under the Security and Intercreditor Agreement.

     "Stock" means, as to any Person, all shares, interests, partnership
interests, limited liability company interests, participations, rights in or
other equivalents (however designated) of such Person's equity

                                       A-6
<PAGE>   313

(however designated) and any rights, warrants or options exchangeable for or
convertible into such shares, interests, participations, rights or other equity.

     "Subsidiary" means, as to any Person (the "parent") at any date, any
corporation, limited liability company, partnership, association or other entity
the accounts of which would be consolidated with those of the parent in the
parent's consolidated financial statements if such financial statements were
prepared in accordance with GAAP as of such date, as well as any other
corporation, limited liability company, partnership, association or other entity
of which securities or other ownership interests representing more than 50% of
the equity or more than 50% of the ordinary voting power is or, in the case of a
partnership, more than 50% of the general partnership interests are, as of such
date, owned, controlled or held by the parent or one or more Subsidiaries of the
parent.

     "Tax Sharing Agreement" means the Tax Sharing Agreement, dated as of May 5,
1995, between the Parent and certain of its Subsidiaries.

     "Total Debt" means, at any date of determination, the sum of all
Indebtedness (other than Intercompany Subordinated Debt) of Arch and its
Subsidiaries, determined on a consolidated basis in accordance with GAAP.

     "Total Leverage Ratio" means, at any date of determination, the ratio of
Total Debt to Annualized Operating Cash Flow.

     "Tranche A Lenders": each Lender having a Tranche A Commitment (or, if no
Tranche A Commitments are in effect, a Tranche A Exposure).

     "Tranche B Lenders": each Lender having a Tranche B Loan outstanding and
its successors and assigns.

     "Tranche B-1 Lenders": each Lender having a Tranche B-1 Loan outstanding
and its successors and assigns.

     "Transactions" collectively, the transactions contemplated by the
Transaction Documents.

     "Transaction Documents" collectively, the Loan Documents and the Merger
Documents.

                                       A-7
<PAGE>   314

                                    ANNEX D
              UNAUDITED COMBINED COMPANY PROJECTED BALANCE SHEETS
                                 (IN MILLIONS)

<TABLE>
<CAPTION>
                                                                  DECEMBER 31,
                                                              ---------------------
                                                                2000        2001
                                                              --------    ---------
<S>                                                           <C>         <C>
ASSETS
Current assets:
  Cash and cash equivalents.................................  $    3.9    $     7.1
  Accounts receivable, net..................................     152.4        155.7
  Inventories...............................................      17.5         19.4
  Prepaid expenses and other................................      28.0         28.6
                                                              --------    ---------
     Total current assets...................................     201.8        210.8
Property and equipment, net.................................     960.1        775.0
Intangible and other assets, net............................   1,387.5      1,093.9
                                                              --------    ---------
                                                              $2,549.4    $2,079.07
                                                              ========    =========
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Current maturities of long-term debt......................  $   34.2    $   132.6
  Accounts payable..........................................      95.9         93.2
  Accrued expenses..........................................      63.1         81.8
  Accrued interest..........................................      53.7         52.4
  Customer deposits and deferred revenue....................      71.4         74.2
  Accrued restructuring charges.............................      27.0           --
                                                              --------    ---------
     Total current liabilities..............................     345.3        434.2
Long-term debt, less current maturities.....................   1,680.5      1,529.0
Other long-term liabilities.................................      67.6         57.6
Stockholders' equity........................................     456.0         58.9
                                                              --------    ---------
                                                              $2,549.4    $ 2,079.7
                                                              ========    =========
</TABLE>

                                       D-1
<PAGE>   315

         UNAUDITED COMBINED COMPANY PROJECTED STATEMENTS OF OPERATIONS
                                 (IN MILLIONS)

<TABLE>
<CAPTION>
                                                                THREE MONTHS
                                                                    ENDED            YEAR ENDED
                                                              DECEMBER 31, 2000   DECEMBER 31, 2001
                                                              -----------------   -----------------
<S>                                                           <C>                 <C>
Service, rental and maintenance revenues....................       $ 347.6            $1,421.3
Product sales...............................................          35.2               143.3
                                                                   -------            --------
  Total revenues............................................         382.8             1,564.6
Cost of products sold.......................................         (24.0)             (105.1)
                                                                   -------            --------
                                                                     358.8             1,459.5
                                                                   -------            --------
Operating expenses:
  Service, rental and maintenance...........................          94.8               365.3
  Selling...................................................          43.2               184.4
  General and administrative................................         108.3               402.8
  Depreciation and amortization.............................         173.9               711.0
                                                                   -------            --------
     Total operating expenses...............................         420.2             1,663.5
                                                                   -------            --------
Operating income (loss).....................................         (61.4)             (204.0)
Interest expense, net.......................................          49.6               193.1
                                                                   -------            --------
Income (loss) before income tax provision and extraordinary
  item......................................................        (111.0)             (397.1)
Provision for income taxes..................................          15.0                  --
                                                                   -------            --------
Income (loss) before extraordinary item.....................        (126.0)             (397.1)
Extraordinary gain from early extinguishment of debt........          95.3                  --
                                                                   -------            --------
Net income (loss)...........................................       $ (30.7)           $ (397.1)
                                                                   =======            ========
</TABLE>

                                       D-2
<PAGE>   316

         UNAUDITED COMBINED COMPANY PROJECTED STATEMENTS OF CASH FLOWS
                                 (IN MILLIONS)

<TABLE>
<CAPTION>
                                                                THREE MONTHS
                                                                    ENDED            YEAR ENDED
                                                              DECEMBER 31, 2000   DECEMBER 31, 2001
                                                              -----------------   -----------------
<S>                                                           <C>                 <C>
Net cash provided by operating activities...................       $   9.3             $ 289.7
                                                                   -------             -------
Cash flow from investing activities:
  Additions to property and equipment, net..................         (56.5)             (221.3)
  Additions to intangible and other assets..................          (2.5)              (11.0)
                                                                   -------             -------
Net cash used from investing activities.....................         (59.0)             (232.3)
                                                                   -------             -------
Cash flows from financing activities:
  Increase in long-term debt................................          10.0                  --
  Repayment of long-term debt...............................          (5.6)              (54.2)
                                                                   -------             -------
Net cash from (used for) financing activities...............           4.4               (54.2)
                                                                   -------             -------
Net increase in cash and cash equivalents...................         (45.3)                3.2
Cash and cash equivalents, beginning of period..............          49.2                 3.9
                                                                   -------             -------
Cash and cash equivalents, end of period....................       $   3.9             $   7.1
                                                                   =======             =======
EBITDA......................................................       $ 112.5             $ 507.0
                                                                   =======             =======
</TABLE>

UNAUDITED FINANCIAL PROJECTIONS AND OPERATIONAL COST SYNERGIES

     Arch and PageNet have developed the unaudited combined company projections
reflected herein. The projections consist of projected operating and financial
results for the three months ending December 31, 2000 and the year ending
December 31, 2001. The projections assume that the merger and related
transactions will take place as of October 1, 2000. The projections have been
prepared for filing with the bankruptcy court in connection with PageNet's
bankruptcy case.

     The projections, which were developed by management of each of Arch and
PageNet, are based on:

             - Arch's projected financial results, as developed by the
               management of Arch, taking into account anticipated cost
               reductions associated with its integration of MobileMedia;

             - PageNet's projected financial results, as developed by the
               management of PageNet, taking into account anticipated cost
               reductions associated with the restructuring of its domestic
               operations and divestiture of 80.5% of its interest in Vast;

     Certain adjustments to PageNet's projected results were made by the
management of Arch to reflect more conservative assumptions with regard to
expected subscriber additions, subscriber turnover and net revenues. Such
adjustments were intended to reflect the continuing potential impact from the
effects of a bankruptcy case and the integration of Arch's and PageNet's
operations.

ASSUMPTIONS USED IN THE UNAUDITED FINANCIAL PROJECTIONS

     A number of important assumptions are reflected in the projections. No
assurance can be given that such assumptions will be realized. See "Risk
Factors" for a discussion of various factors that could materially affect the
combined company's financial condition, results of operations, business,
prospects and securities.

          1. The projections assume the merger will take place on October 1,
     2000.

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          2. The projections assume that general economic conditions will
     continue unchanged throughout the projection period and that their
     potential impact on capital spending and revenues within each of the
     combined company's operating regions will not fluctuate.

          3. Management estimates that it will achieve $100 million in operating
     cost reductions annually after the consummation of the merger. However, due
     to the time involved in implementing these cost savings, the projections
     assume that the combined company would recognize only $15 million in
     operating cost reductions for the three months ended December 31, 2000, and
     $95 million in operating cost reductions for the year ended December 31,
     2001. The managements of Arch and PageNet estimated the amounts and timing
     of these operating cost reductions during multiple meetings. During these
     meetings, they performed a market-by-market analysis to identify redundant
     costs.

          4. Service revenues for the combined company have been projected to
     decrease by 11.7% for 2000 on the basis of Arch management's estimates for
     subscriber growth and average revenue per unit. Based on these estimates,
     Arch's service revenues for 2000 were projected to decrease by
     approximately 8.0% from 1999, while PageNet's service revenues were
     projected to decrease by approximately 14.8% from 1999. The combined
     company's service revenues for 2001 were projected to decreased by 2.5% as
     compared to 2000.

          5. Projected operating costs for 2000 are based on historical cost
     margins for both companies individually and the expected decrease in cost
     margins as Arch achieves further cost reductions resulting from its
     integration of MobileMedia and PageNet. The combined company's projected
     operating costs for 2000 are based on the actual 1999 operating results for
     the individual companies. The cost margins used for 2000 assume a reduction
     in the historical cost margins (approximately 1.2% of net revenue) for
     Arch's base business and assume a reduction in the historical cost margins
     (approximately 2.2% of net revenue) for PageNet's base business. Projected
     costs are based upon historical experience, expected market conditions and
     historical decreases in Arch's costs as Arch increased its operating
     leverage. These cost assumptions were then adjusted to reflect the impact
     of the assumed synergies.

          6. The projections assume that the combined company will utilize
     available borrowing capacity from its senior credit facility to fully repay
     all administrative claims and transaction expenses and provide for working
     capital throughout the period of the projections. Outstanding obligations
     to PageNet's secured bank lenders are assumed to become obligations of the
     combined company.

          7. Interest expense is calculated based upon the capital structure
     that would result upon consummation of the merger and related transactions,
     as described in "Unaudited Selected Pro Forma Consolidated Financial Data",
     during the projection period. This assumes tender and acceptance of 100% of
     Arch's discount notes. Interest also includes the amortization of any
     original issue discounts.

          8. The projections have been prepared in accordance with applicable
     principles of purchase accounting. Under purchase accounting principles,
     the combined company will record an intangible asset equal to the excess,
     if any, of the purchase price paid by Arch in the merger over the net fair
     market value allocated to the identifiable assets and liabilities of
     PageNet. We refer to any such excess as goodwill. The projections assume
     that goodwill will be amortized ratably on a straight-line basis over a
     period of 10 years. The actual calculation of goodwill will depend upon the
     actual price of Arch's common stock at the time of the merger. The
     projections assume a value of $6.02 per share of Arch common stock to
     calculate the purchase accounting adjustment and an assumption that the
     historical, restated book value of PageNet's assets and liabilities
     generally approximates fair value.

          Arch and PageNet have made these assumptions and resultant
     computations solely for the purpose of preparing the projections. The
     combined company will be required to determine the actual amount of
     goodwill and the appropriate amortization period when the merger takes
     place. Such determination will be based on the fair values of PageNet's net
     assets and other relevant information

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     when the merger takes place. Although these determinations are not
     currently expected to result in the actual amount of goodwill and related
     amortization being materially greater or less than the amounts assumed for
     purposes of the projections, there can be no assurance in that regard. Any
     increase in the amount of amortization of goodwill would reduce periodic
     income before taxes and net income.

          9. Projections of changes in certain balance sheet accounts such as
     accounts receivable and accounts payable are based on historic ratios of
     such accounts to other accounts such as revenue. These projections have
     been modified, where deemed appropriate, to recognize any adjustment or
     balance sheet item changes necessary to reflect the business combination.
     Arch assumed approximately 40 days sales outstanding to estimate the
     accounts receivable balance and approximately 45 days costs outstanding to
     estimate the accounts payable balance. The projected long-term debt
     reflects payments made to reduce borrowings under the senior credit
     facility.

     THE COMBINED COMPANY PROJECTIONS WERE NOT PREPARED TO COMPLY WITH THE
GUIDELINES FOR PROSPECTIVE FINANCIAL STATEMENTS PUBLISHED BY THE AMERICAN
INSTITUTE OF CERTIFIED PUBLIC ACCOUNTANTS. NEITHER THE INDEPENDENT ACCOUNTANTS
FOR ARCH NOR THE INDEPENDENT AUDITORS FOR PAGENET HAVE EXAMINED OR COMPILED THE
ACCOMPANYING PROJECTIONS AND ACCORDINGLY DO NOT EXPRESS AN OPINION OR ANY OTHER
FORM OF ASSURANCE WITH RESPECT TO THE PROJECTIONS, ASSUME NO RESPONSIBILITY FOR
THE PROJECTIONS AND DISCLAIM ANY ASSOCIATION WITH THE PROJECTIONS.

     ARCH AND PAGENET DO NOT PUBLISH PROJECTIONS OF THEIR RESPECTIVE ANTICIPATED
FINANCIAL POSITION OR RESULTS OF OPERATIONS. HOWEVER, TO THE EXTENT THEY BELIEVE
THAT THE SECURITIES LAWS REQUIRE, ARCH AND PAGENET WILL:

     - FURNISH UPDATED COMBINED COMPANY PROJECTIONS,

     - INCLUDE SUCH UPDATED INFORMATION IN ANY DOCUMENTS WHICH MAY BE REQUIRED
       TO BE FILED WITH THE SEC, OR

     - OTHERWISE MAKE SUCH UPDATED INFORMATION PUBLICLY AVAILABLE.

     THE SECURITIES LAWS REQUIRE FULL AND PROMPT DISCLOSURE OF MATERIAL FACTS,
BOTH FAVORABLE AND UNFAVORABLE, REGARDING ARCH'S AND PAGENET'S FINANCIAL
CONDITION AND MAY EXTEND TO SITUATIONS WHERE MANAGEMENT KNOWS OR HAS REASON TO
KNOW ITS PREVIOUSLY DISCLOSED PROJECTIONS NO LONGER HAVE A REASONABLE BASIS.
MANAGEMENT OF ARCH AND PAGENET BELIEVE THAT THE PROJECTED AMOUNTS ARE THE MOST
PROBABLE SPECIFIC AMOUNTS THAT THEY CAN FORECAST AND THAT THE ESTIMATES AND
ASSUMPTIONS THEY HAVE MADE IN ARRIVING AT THESE AMOUNTS ARE REASONABLE. THE
ESTIMATES AND ASSUMPTIONS MAY NOT BE REALIZED, HOWEVER, AND ARE INHERENTLY
SUBJECT TO SIGNIFICANT BUSINESS, ECONOMIC AND COMPETITIVE UNCERTAINTIES AND
CONTINGENCIES, MANY OF WHICH ARE BEYOND THE CONTROL OF ARCH AND PAGENET. NO
REPRESENTATIONS CAN BE OR ARE MADE AS TO WHETHER ACTUAL RESULTS WILL MEET THE
RESULTS SET FORTH IN THE COMBINED COMPANY PROJECTIONS. SOME ASSUMPTIONS
INEVITABLY WILL NOT MATERIALIZE, AND EVENTS AND CIRCUMSTANCES OCCURRING
SUBSEQUENT TO THE DATE ON WHICH THE PROJECTIONS WERE PREPARED MAY BE DIFFERENT
FROM THOSE ASSUMED OR MAY BE UNANTICIPATED, AND THEREFORE MAY AFFECT FINANCIAL
RESULTS IN A MATERIAL AND POSSIBLY ADVERSE MANNER. THE PROJECTIONS, THEREFORE,
MAY NOT BE RELIED UPON AS A GUARANTEE OR OTHER ASSURANCE OF THE ACTUAL RESULTS
THAT WILL OCCUR. SEE "FORWARD-LOOKING STATEMENTS."

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