CELLNET DATA SYSTEMS INC
S-4/A, 1996-12-30
TELEGRAPH & OTHER MESSAGE COMMUNICATIONS
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<PAGE>
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON DECEMBER 27, 1996
                                                      REGISTRATION NO. 333-15395
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                AMENDMENT NO. 1
                                       TO
                              NOTE EXCHANGE OFFER
                                       ON
                                    FORM S-4
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
 
                           CELLNET DATA SYSTEMS, INC.
             (Exact name of Registrant as specified in its charter)
 
<TABLE>
<S>                              <C>                            <C>
           DELAWARE                          4825                  94-2951096
 (State or other jurisdiction    (Primary Standard Industrial   (I.R.S. Employer
     of incorporation or         Classification Code Number)     Identification
        organization)                                               Number)
</TABLE>
 
                               125 SHOREWAY ROAD
                              SAN CARLOS, CA 94070
                                 (415) 508-6000
  (Address, including zip code, and telephone number, including area code, of
                   Registrant's principal executive offices)
                            ------------------------
                                 JOHN M. SEIDL
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                           CELLNET DATA SYSTEMS, INC.
                               125 SHOREWAY ROAD
                              SAN CARLOS, CA 94070
                                 (415) 508-6000
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
                            ------------------------
                                   COPIES TO:
                             BARRY E. TAYLOR, ESQ.
                           MEREDITH S. JACKSON, ESQ.
                            TREVOR J. CHAPLICK, ESQ.
                        WILSON SONSINI GOODRICH & ROSATI
                            PROFESSIONAL CORPORATION
                               650 PAGE MILL ROAD
                        PALO ALTO, CALIFORNIA 94304-1050
                                 (415) 493-9300
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
As soon as practicable after the effective date of this Registration Statement.
 
    If any of the securities being registered on this Form are to be offered in
connection with the formation of a holding company and there is compliance with
General Instruction G, check the following box.  / /
                            ------------------------
                        CALCULATION OF REGISTRATION FEE
 
<TABLE>
<CAPTION>
                                                                  PROPOSED             PROPOSED
        TITLE OF EACH CLASS OF                 AMOUNT         MAXIMUM OFFERING    MAXIMUM AGGREGATE             AMOUNT OF
      SECURITIES TO BE REGISTERED         TO BE REGISTERED   PRICE PER UNIT(1)    OFFERING PRICE(1)         REGISTRATION FEE
<S>                                      <C>                 <C>                 <C>                   <C>
13% Senior Discount Notes due 2005,
  Series B.............................     $325,000,000            100%             $325,000,000                $98,485
</TABLE>
 
(1) Estimated solely for the purpose of calculating the registration fee.
                            ------------------------
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                 SUBJECT TO COMPLETION DATED DECEMBER 27, 1996
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
PROSPECTUS
 
                           CELLNET DATA SYSTEMS, INC.
 
                             OFFER TO EXCHANGE ITS
             13% SENIOR DISCOUNT NOTES DUE JUNE 15, 2005, SERIES B
              WHICH HAVE BEEN REGISTERED UNDER THE SECURITIES ACT
                       FOR ANY AND ALL OF ITS OUTSTANDING
             13% SENIOR DISCOUNT NOTES DUE JUNE 15, 2005, SERIES A
 
       THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M.,
             NEW YORK CITY TIME ON JUNE 28, 1997, UNLESS EXTENDED.
                            ------------------------
 
    CellNet Data Systems, Inc. ("CellNet" or the "Company") hereby offers, upon
the terms and subject to the conditions set forth in this Prospectus (as the
same may be amended or supplemented from time to time, the "Prospectus") and the
accompanying Letter of Transmittal (the "Letter of Transmittal" and together
with this Prospectus, the "Exchange Offer"), to exchange $1,000 principal amount
of its 13% Senior Discount Notes due June 15, 2005, Series B (the "New Notes")
which have been registered under the Securities Act of 1933, as amended (the
"Securities Act"), pursuant to a registration statement (the "Registration
Statement") of which this Prospectus is a part, for each $1,000 principal amount
of its outstanding 13% Senior Discount Notes due June 15, 2005, Series A (the
"Old Notes," and together with the New Notes, the "Notes"), of which $325
million principal amount at maturity is outstanding as of the date hereof.
 
    The Company will accept for exchange any and all validly tendered Old Notes
prior to 5:00 P.M., New York City time, on June 28, 1997, unless extended (the
"Expiration Date"). Old Notes may be tendered only in integral multiples of
$1,000. Tenders of Old Notes may be withdrawn at any time prior to 5:00 P.M.,
New York City time, on the Expiration Date. The Exchange Offer is not
conditioned upon any minimum principal amount of Old Notes being tendered for
exchange. However, the Exchange Offer is subject to certain customary
conditions. In the event the Company terminates the Exchange Offer and does not
accept for exchange any Old Notes, the Company will promptly return the Old
Notes to the holders thereof. The Company will not receive any proceeds from the
Exchange Offer. See "The Exchange Offer."
 
    The terms of the New Notes will be identical to the terms of the Old Notes,
in all material respects, except that the New Notes (i) will have been
registered under the Securities Act and therefore will not be subject to certain
restrictions on transfer applicable to the Old Notes and (ii) will not be
entitled to registration or other rights under the Registration Rights Agreement
(as defined below) including the provision in the Registration Rights Agreement
for an increase of .50% per annum of the interest rate thereon upon failure by
the Company to consummate the Exchange Offer. See "Description of the Old
Notes." The New Notes will be entitled to the benefits of the indenture, as
supplemented, governing the Old Notes (the "Indenture"). See "Description of New
Notes." See "The Exchange Offer."
 
                                                     CONTINUED ON FOLLOWING PAGE
 
THIS PROSPECTUS AND THE LETTER OF TRANSMITTAL ARE FIRST BEING MAILED TO HOLDERS
                               ON        , 1996.
 
    SEE "RISK FACTORS" ON PAGE 15 FOR INFORMATION THAT SHOULD BE CONSIDERED
                       IN CONNECTION WITH THIS OFFERING.
                             ---------------------
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
     EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE
        COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
        ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRE- SENTATION
                     TO THE CONTRARY IS A CRIMINAL OFFENSE.
                            ------------------------
 
                The date of this Prospectus is           , 1996
<PAGE>
(CONTINUATION OF COVER PAGE)
    The New Notes are being offered hereunder in order to satisfy certain
obligations of the Company under the Notes Registration Rights Agreement, dated
as of June 15, 1995 by and between the Company and the Initial Purchaser (as
defined herein), as supplemented by the First Supplemental Notes Registration
Rights Agreement dated as of November 21, 1995, (collectively, the "Registration
Rights Agreement"), by and among the Company and the holders of registered notes
named therein, a copy of which has been filed as an exhibit to the Registration
Statement of which this Prospectus is a part. The Exchange Offer is intended to
satisfy the Company's obligations under the Registration Rights Agreement to
register the Old Notes under the Securities Act. Once the Exchange Offer is
consummated, the Company will have no further obligations to register any of the
Old Notes not tendered by the holders of the Old Notes (the "Holders") for
exchange. See "Risk Factors--Consequences to Non-Tendering Holders of Old
Notes."
 
    Old Notes initially purchased by "qualified institutional buyers" (as such
term is defined in Rule 144A under the Securities Act) were initially
represented by two Global Old Notes (as defined herein) in fully registered
form, both registered in the name of a nominee of The Depository Trust Company
("DTC"), as depositary. The New Notes exchanged for the Old Notes represented by
the Global Old Notes will be represented by a single Global New Note (as defined
herein) in fully registered form, registered in the name of the nominee of DTC.
The Global New Note will be exchangeable for the New Notes in registered form,
in denominations of $1,000 and integral multiples thereof as described herein.
The New Notes in global form will trade in The Depository Trust Company's
Same-Day Funds Settlement System, and secondary market trading activity in such
New Notes will therefore settle in immediately available funds. See "Description
of New Notes--Form, Denomination and Book-Entry Procedures."
 
    The New Notes will accrete at the rate of 13% per annum from the date of
issuance thereof until June 15, 2000. Thereafter, the New Notes will bear
interest at a rate equal to 13% per annum, payable semi-annually in arrears on
June 15 and December 15 of each year, commencing December 15, 2000. The Old
Notes will continue to accrete at the rate of 13% per annum to, but not
including, the date of issuance of the New Notes. Such accretion will become a
part of the Accreted Amount (as defined herein) of the New Notes.
 
    The New Notes will be redeemable at the option of the Company, in whole or
in part, at any time on or after June 15, 2000, at the redemption prices set
forth herein, together with accrued and unpaid interest, if any, to the date of
redemption. On or prior to June 15, 1998, up to 25% of the aggregate principal
amount of the New Notes originally issued will be redeemable at the option of
the Company from the net proceeds of a Public Equity Offering (as defined in the
Indenture) after giving effect to which there exists a Public Market (as defined
in the Indenture) within 60 days thereafter, at 113% of the principal amount
thereof, together with accrued and unpaid interest, if any, to the date of
redemption; provided, however, in no event shall less than 75% of the New Notes
be outstanding after such redemption. Upon the occurrence of a Change of Control
(as defined in the Indenture), each holder of the New Notes may require the
Company to repurchase all or a portion of such holder's New Notes at 101% of the
Accreted Value thereof (if prior to June 15, 2000) or the principal amount
thereof (if on or after June 15, 2000), together with accrued and unpaid
interest and Additional Interest (as defined in the Registration Rights
Agreement), if any, to the date of repurchase. See "Description of New Notes."
 
    The Company is making the Exchange Offer in reliance on the position of the
Staff of the Division of Corporation Finance of the Securities and Exchange
Commission (the "Commission") as set forth in the Staff's Exxon Capital Holdings
Corp. SEC No-Action Letter (available April 13, 1989), Morgan Stanley & Co.,
Inc. SEC No-Action Letter (available June 5, 1991), Shearman & Sterling SEC
No-Action Letter (available July 7, 1993), and other interpretive letters
addressed to third parties in other transactions. However, the Company has not
sought its own interpretive letter and there can be no assurance that the Staff
of the Division of Corporation Finance of the Commission would make a similar
determination with respect to the Exchange Offer as it has in such interpretive
letters to third parties. Based on these interpretations by the Staff of the
Division of Corporation Finance, and subject to the two immediately
 
                                       2
<PAGE>
(CONTINUATION OF COVER PAGE)
following sentences, the Company believes that New Notes issued pursuant to this
Exchange Offer in exchange for Old Notes may be offered for resale, resold and
otherwise transferred by a holder thereof (other than a Holder who is a
broker-dealer) without further compliance with the registration and prospectus
delivery requirements of the Securities Act, provided that such New Notes are
acquired in the ordinary course of such Holder's business and that such Holder
is not participating, and has no arrangement or understanding with any person to
participate, in a distribution (within the meaning of the Securities Act) of
such New Notes. However, any Holder of Old Notes who is an "affiliate" of the
Company or who intends to participate in the Exchange Offer for the purpose of
distributing New Notes, or any broker-dealer who purchased Old Notes from the
Company to resell pursuant to Rule 144A under the Securities Act ("Rule 144A")
or any other available exemption under the Securities Act, (a) will not be able
to rely on the interpretations of the staff of the Division of Corporation
Finance of the Commission set forth in the above-mentioned interpretive letters,
(b) will not be permitted or entitled to tender such Old Notes in the Exchange
Offer and (c) must comply with the registration and prospectus delivery
requirements of the Securities Act in connection with any sale or other transfer
of such Old Notes unless such sale is made pursuant to an exemption from such
requirements. See "Risk Factors--Consequences to Non-Tendering Holders of Old
Notes." In addition, as described below, if any broker-dealer holds Old Notes
acquired for its own account as a result of market-making or other trading
activities and exchanges such Old Notes for New Notes, then such broker-dealer
must deliver a prospectus meeting the requirements of the Securities Act in
connection with any resales of such New Notes.
 
    Each Holder of Old Notes who wishes to exchange Old Notes for New Notes in
the Exchange Offer will be required to represent that (i) it is not an
"affiliate" of the Company, (ii) any New Notes to be received by it are being
acquired in the ordinary course of its business, (iii) it has no arrangement or
understanding with any person to participate in a distribution (within the
meaning of the Securities Act) of such New Notes, and (iv) if such Holder is not
a broker-dealer, such Holder is not engaged in, and does not intend to engage
in, a distribution (within the meaning of the Securities Act) of such New Notes.
Each broker-dealer that receives New Notes for its own account pursuant to the
Exchange Offer must acknowledge that it acquired the Old Notes for its own
account as a result of market making activities or other trading activities and
must agree that it will deliver a prospectus meeting the requirements of the
Securities Act in connection with any resale of such New Notes. The Letter of
Transmittal states that by so acknowledging and by delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act. Based on the position taken by the Staff of the
Division of Corporation Finance of the Commission in the interpretive letters
referred to above, the Company believes that broker-dealers who acquired Old
Notes for their own accounts, as a result of market making activities or other
trading activities ("Participating Broker-Dealers") may fulfill their prospectus
delivery requirements with respect to the New Notes received upon exchange of
such Old Notes (other than Old Notes which represent an unsold allotment from
the original sale of the Old Notes) with a prospectus meeting the requirements
of the Securities Act, which may be the prospectus prepared for an exchange
offer so long as it contains a description of the plan of distribution with
respect to the resale of such New Notes. Accordingly, this Prospectus, as it may
be amended or supplemented from time to time, may be used by a Participating
Broker-Dealer during the period referred to below in connection with resales of
New Notes received in exchange for Old Notes where such Old Notes were acquired
by such Participating Broker-Dealer for its own account as a result of market
making or other trading activities. Subject to certain provisions set forth in
the Registration Rights Agreement, the Company has agreed that this Prospectus,
as it may be amended or supplemented from time to time, may be used by a
Participating Broker-Dealer in connection with resales of such New Notes for a
period ending 90 days after the Expiration Date referred to below (subject to
extension under certain limited circumstances described below) or, if earlier,
when all such New Notes have been disposed of by such Participating
Broker-Dealer. See "Plan of Distribution." Any Participating Broker-Dealer who
is an "affiliate" of the Company may not
 
                                       3
<PAGE>
(CONTINUATION OF COVER PAGE)
rely on such interpretive letters and must comply with the registration and
prospectus delivery requirements of the Securities Act in connection with any
resale transaction. See "The Exchange Offer--Resales of New Notes."
 
    In that regard, each Participating Broker-Dealer who surrenders Old Notes
pursuant to the Exchange Offer will be deemed to have agreed, by execution of
the Letter of Transmittal, that, upon receipt of notice from the Company of the
occurrence of any event or the discovery of any fact which makes any statement
contained or incorporated by reference in this Prospectus untrue in any material
respect or which causes this Prospectus to omit to state a material fact
necessary in order to make the statements contained or incorporated by reference
herein, in light of the circumstances under which they were made, not misleading
or of the occurrence of certain other events specified in the Registration
Rights Agreement, such Participating Broker-Dealer will suspend the sale of New
Notes pursuant to this Prospectus until the Company has amended or supplemented
this Prospectus to correct such misstatement or omission and has furnished
copies of the amended or supplemented Prospectus to such Participating
Broker-Dealer or the Company has given notice that the sale of the New Notes may
be resumed, as the case may be. If the Company gives such notice to suspend the
sale of the New Notes, it shall extend the 90-day period referred to above
during which Participating Broker-Dealers are entitled to use this Prospectus in
connection with the resale of New Notes by the number of days during the period
from and including the date of the giving of such notice to and including the
date when Participating Broker-Dealers shall have received copies of the amended
or supplemented Prospectus necessary to permit resales of the New Notes or to
and including the date on which the Company has given notice that the sale of
New Notes may be resumed, as the case may be.
 
    The New Notes will be unsecured obligations of the Company, will rank PARI
PASSU with all other senior debt of the Company, will be senior in right of
payment to all existing and future subordinated debt of the Company and will be
effectively subordinated to all secured debt of the Company and all indebtedness
(including subordinated debt and trade payables) of subsidiaries of the Company.
As of June 30, 1996 the aggregate amount of senior debt of the Company was
$194,720,000. See "Capitalization." The Indenture permits the Company and its
subsidiaries to incur substantial additional indebtedness, including secured
indebtedness. The Company conducts its operations primarily through its
subsidiaries. The Company and its subsidiaries had additional debt of $793,000
in the aggregate at June 30, 1996. These subsidiaries do not guarantee the Old
Notes and will not be required to guarantee the New Notes, and the Company is
permitted to make substantial investments in these subsidiaries.
 
    Any Old Notes not tendered and accepted in the Exchange Offer will remain
outstanding and will be entitled to all the same rights and will be subject to
the same limitations applicable thereto under the Indenture (except for those
rights which terminate upon consummation of the Exchange Offer). Following
consummation of the Exchange Offer, the Holders of Old Notes will continue to be
subject to the existing restrictions upon transfer thereof and the Company will
have no further obligation to such Holders (other than to the Initial Purchaser
under certain limited circumstances) to provide for registration under the
Securities Act of the Old Notes held by them. To the extent that Old Notes are
tendered and accepted in the Exchange Offer, a Holder's ability to sell
untendered Old Notes could be adversely affected. See "Summary--Certain
Consequences of a Failure to Exchange Old Notes."
 
    THIS PROSPECTUS AND THE RELATED LETTER OF TRANSMITTAL CONTAIN IMPORTANT
INFORMATION. HOLDERS OF OLD NOTES ARE URGED TO READ THIS PROSPECTUS AND THE
RELATED LETTER OF TRANSMITTAL CAREFULLY BEFORE DECIDING WHETHER TO TENDER THEIR
OLD NOTES PURSUANT TO THE EXCHANGE OFFER.
 
    Prior to this offering, there has been no public market for the Old Notes or
New Notes. The Company does not intend to list the New Notes on a national
securities exchange or to seek approval for quotation through the Nasdaq
National Market. As the Old Notes were issued and the New Notes are being issued
to a limited number of institutions who typically hold similar securities for
investments, the Company does
 
                                       4
<PAGE>
(CONTINUATION OF COVER PAGE)
not expect that an active public market for the New Notes will develop. In
addition, resales by certain Holders of the Old Notes or the New Notes of a
substantial percentage of the aggregate principal amount of such Notes could
constrain the ability of any market maker to develop or maintain a market for
the New Notes. To the extent that a market for the New Notes should develop, the
market value of the New Notes will depend on prevailing interest rates, the
market for similar securities and other factors, including the financial
condition, performance and prospects of the Company. Such factors might cause
the New Notes to trade at a discount from face value. See "Risk Factors--Absence
of Public Market for the Notes." The Company has agreed to pay the expenses of
the Exchange Offer.
 
    The Company will not receive any cash proceeds from the issuance of the New
Notes offered hereby. No dealer-manager is being used in connection with the
Exchange Offer. See "Use of Proceeds" and "Plan of Distribution."
 
                             AVAILABLE INFORMATION
 
    The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and, in accordance
therewith, files reports, proxy statements and other information with the
Commission. Reports, proxy statements and other information filed by the Company
with the Commission pursuant to the informational requirements of the Exchange
Act may be inspected and copied at the public reference facilities maintained by
the Commission at Room 1024, 450 Fifth Street, N.W., Judiciary Plaza,
Washington, D.C. 20549, and at the Commission's Regional Offices in New York
City (Seven World Trade Center, 13th Floor, New York, New York 10048), and
Chicago (Citicorp Center, 500 West Madison Street, Suite 1400, Chicago, Illinois
60661). Copies of these materials may be obtained upon written request from the
Public Reference Section of the Commission, 450 Fifth Street, N.W., Washington,
D.C. 20549, at prescribed rates. The Common Stock of the Company is traded on
the Nasdaq National Market. Reports, proxy statements and other information
concerning the Company may also be inspected at the offices of the Nasdaq
National Market, Nasdaq Operations, 1735 K Street, N.W., Washington, D.C. 20006.
 
                             ADDITIONAL INFORMATION
 
    This Prospectus constitutes a part of a registration statement on Form S-4
(together with all amendments thereto, the "Registration Statement") filed by
the Company with the Commission under the Securities Act. This Prospectus, which
forms a part of the Registration Statement, does not contain all the information
set forth in the Registration Statement, certain parts of which have been
omitted in accordance with the rules and regulations of the Commission.
Reference is hereby made to the Registration Statement and related exhibits and
schedules filed therewith for further information with respect to the Company
and the New Notes offered hereby. Statements contained herein concerning the
provisions of any document are not necessarily complete and, in each instance,
reference is made to the copy of such document filed or incorporated by
reference as an exhibit to the Registration Statement or otherwise filed by the
Company with the Commission and each such statement is qualified in its entirety
by such reference. The Registration Statement and the exhibits and schedules
thereto may be inspected and copied at the public reference facilities
maintained by the Commission at the addresses described above. The Commission
maintains a Web site that contains reports, proxy and information statements and
other information regarding registrants that file electronically with the
Commission. Copies of the Registration Statement may be obtained from the
Commission's Internet address at http://www.sec.gov.
 
                                       5
<PAGE>
                               PROSPECTUS SUMMARY
 
    THE FOLLOWING SUMMARY IS QUALIFIED IN ITS ENTIRETY BY THE MORE DETAILED
INFORMATION, INCLUDING "RISK FACTORS" AND THE CONSOLIDATED FINANCIAL STATEMENTS
AND NOTES THERETO, APPEARING ELSEWHERE IN THIS PROSPECTUS. REFERENCES HEREIN TO
"CELLNET" OR THE "COMPANY" REFER TO CELLNET DATA SYSTEMS, INC. AND ITS
SUBSIDIARIES. THE NEW NOTES OFFERED HEREBY ARE SUBJECT TO A HIGH DEGREE OF RISK.
SEE "RISK FACTORS." CERTAIN INFORMATION CONTAINED IN THIS SUMMARY AND ELSEWHERE
IN THIS PROSPECTUS, INCLUDING INFORMATION WITH REGARD TO THE COMPANY'S EXPECTED
WIRELESS DATA COMMUNICATIONS NETWORK DEPLOYMENTS AND OPERATIONS, ITS STRATEGY
FOR MARKETING AND DEPLOYING SUCH NETWORKS AND RELATED FINANCING ACTIVITIES,
CONTAINS FORWARD-LOOKING STATEMENTS THAT INVOLVE RISKS AND UNCERTAINTIES. THE
COMPANY'S ACTUAL RESULTS MAY DIFFER MATERIALLY FROM THE RESULTS DISCUSSED IN THE
FORWARD-LOOKING STATEMENTS AND THE VARIATIONS MAY BE MATERIAL. FACTORS THAT
MIGHT CAUSE SUCH A DIFFERENCE INCLUDE, BUT ARE NOT LIMITED TO, THOSE DISCUSSED
IN "RISK FACTORS," "MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS OF OPERATIONS" AND "BUSINESS."
 
                                  THE COMPANY
 
    The Company designs, builds, owns and operates innovative wireless networks
capable of providing low-cost real-time status and event monitoring of up to
several million fixed endpoints. The primary application of the Company's
network is to provide network meter reading ("NMR") services to electric, gas
and water utility companies pursuant to long-term contracts. The Company is
currently building wireless networks to provide NMR services to Kansas City
Power & Light Company ("KCPL") and Union Electric Company ("UE") in St. Louis
covering a total of approximately 1,230,000 meters, of which more than 105,000
meters were in revenue service as of June 30, 1996. In addition, the Company has
recently entered into separate services agreements with Northern States Power
Company ("NSP") in Minneapolis, Pacific Gas & Electric Company ("PG&E") in San
Francisco and Puget Sound Power & Light Company ("Puget") in Washington State,
pursuant to which it has contracted to build wireless networks to provide NMR
services covering an aggregate of approximately 1,115,000 additional meters,
including 1,000,000 meters under the NSP Services Agreement, 100,000 meters
under the PG&E Services Agreement and an initial installation consisting of
15,000 meters under the Puget Services Agreement. CellNet also currently
provides certain network distribution automation services to electric utility
customers including monitoring and control of power distribution equipment.
CellNet's network uses radio devices fitted to existing utility meters to read
and report data from each meter every few minutes. Through efficient use of
radio frequency spectrum, the Company's networks will have substantial
additional capacity to service non-utility applications that require low-cost
monitoring of fixed endpoints, such as home security and remote status
monitoring of vending machines and office equipment. The Company is working with
industry leaders in those markets to encourage further development of such
applications.
 
    CellNet believes it has a first-to-market opportunity to offer wireless data
communications services on a commercial scale for utility and selected
non-utility applications. CellNet's network is distinguished by the following
advantages:
 
    - infrastructure and operating costs sufficiently low to permit cost
      effective utility meter reading and other fixed point monitoring
      applications;
 
    - highly efficient use of spectrum--the equivalent of approximately a single
      voice channel is needed to operate a network;
 
    - proprietary software specifically designed to manage real-time data
      collection from up to several million endpoints; and
 
    - open system architecture designed to allow new applications to be added to
      the CellNet system.
 
    Utilities are under increasing regulatory and competitive pressures. CellNet
offers an outsourced solution which enables utilities to offer time-of-use
pricing plans, peak demand monitoring, real-time response to billing inquiries,
real-time power outage detection, on-demand meter reads, customized billing
 
                                       6
<PAGE>
functions and distribution automation. The Company believes its NMR services
provide utilities with an effective solution to many of the demands created by
increased regulatory and competitive pressures within the utility industry.
CellNet's system allows utilities to respond effectively to regulatory changes,
reduce costs, defer capital spending and enhance their operating efficiencies.
 
    CellNet's strategy is to deploy and operate a series of wireless data
communications networks pursuant to long-term contracts with utility company
customers and to earn recurring revenues by providing NMR services to such
utilities and by using the network to support a variety of non-utility
applications. Principal elements of CellNet's strategy include (i) focus on
utility markets, (ii) promote development of non-utility applications, (iii)
form strategic alliances to enhance NMR services and offer additional services,
(iv) pursue international expansion and (v) outsource a substantial portion of
its manufacturing and installation activities.
 
    The Company is actively targeting those utilities which operate in the 60
largest Metropolitan Statistical Areas ("MSAs"), which represent a majority of
the 225 million electric, gas and water meters in the U.S. The Company believes
that utilities operating in these densely populated areas will be the first to
experience heightened competitive and regulatory pressures, and as such, will be
most likely to benefit from the Company's services. The Company believes that
these competitive and regulatory pressures have recently prompted utilities in
the U.S. to undertake increased measures to improve their efficiency and service
levels.
 
    CellNet's proprietary technology enables the Company to make extremely
efficient use of spectrum. As a result, relative to other wireless services, the
Company has been able to acquire frequency at a very low cost. The Company had
capitalized $762,000 for license fees and related expenses as of June 30, 1996
and has acquired 50 spectrum licenses in 42 of the top 60 MSAs. The Company
believes that it will be able to obtain additional spectrum at reasonable cost
if required. The Company has focused its spectrum acquisition strategy on these
top 60 markets.
 
    The Company believes its spectrum-efficient networks will have substantial
excess capacity to service non-utility applications which require low-cost
monitoring of fixed endpoints. Potential non-utility applications of the
Company's systems include home security, remote status monitoring of vending
machines, office equipment, parking meters and other equipment and remote
control of traffic lights. The Company is working with industry leaders such as
Ameritech, Hewlett-Packard, Honeywell, Inc., Real Time Data, Inc., and
Interactive Technologies, Inc. to develop such applications. The Company
believes that its utility networks will provide an excellent platform to
position the Company as a leading wholesale provider of wireless data
communications services for such non-utility applications.
 
    The Company believes that a significant international market also exists for
its services with several hundred million electric, gas and water meters outside
of the U.S. The Company's strategy is to pursue international markets through a
proposed joint venture with Bechtel Enterprises, Inc. ("BEn"). The Company is
currently exploring projects with electric utilities in the United Kingdom,
Singapore and Thailand.
 
                                       7
<PAGE>
                               THE EXCHANGE OFFER
 
<TABLE>
<S>                                 <C>
The Exchange Offer................  $1,000 principal amount of the New Notes in exchange for
                                    each $1,000 principal amount of the Old Notes. As of
                                    October 31, 1996, $325 million in aggregate principal
                                    amount at maturity of Old Notes were outstanding. The
                                    Company will issue the New Notes to Holders on or
                                    promptly after the Expiration Date.
 
                                    Based on an interpretation by the Staff of the
                                    Commission set forth in the Staff's Exxon Capital
                                    Holdings Corp. SEC No-Action Letter (available April 13,
                                    1989), Morgan Stanley & Co., Inc. SEC No-Action Letter
                                    (available June 5, 1991), Shearman & Sterling SEC
                                    No-Action Letter (available July 7, 1993), and other
                                    no-action letters issued to third parties, the Company
                                    believes that New Notes issued pursuant to the Exchange
                                    Offer in exchange for Old Notes may be offered for
                                    resale, resold and otherwise transferred by Holders
                                    thereof without compliance with the registration and
                                    prospectus delivery provisions of the Securities Act.
                                    However, any Holder who is an "affiliate" of CellNet or
                                    who intends to participate in the Exchange Offer for the
                                    purpose of distributing the New Notes (i) cannot rely on
                                    the interpretation by the Staff of the Commission set
                                    forth in the above referenced no-action letters, (ii)
                                    cannot tender its Old Notes in the Exchange Offer, and
                                    (iii) must comply with the registration and prospectus
                                    delivery requirements of the Securities Act in
                                    connection with any sale or transfer of the Old Notes,
                                    unless such sale or transfer is made pursuant to an
                                    exemption from such requirements. See "Risk Factors--
                                    Consequences to Non-Tendering Holder of Old Notes."
 
                                    Each broker-dealer that receives New Notes for its own
                                    account pursuant to the Exchange Offer must acknowledge
                                    that it will deliver a prospectus in connection with any
                                    resale of such New Notes. The Letter of Transmittal
                                    states that by so acknowledging and by delivering a
                                    prospectus, a broker-dealer will not be deemed to admit
                                    that it is an "underwriter" within the meaning of the
                                    Securities Act. This Prospectus, as it may be amended or
                                    supplemented from time to time, may be used by a broker-
                                    dealer in connection with resales of New Notes received
                                    in exchange for Old Notes where such Old Notes were
                                    acquired by such broker-dealer as a result of market
                                    making activities or other trading activities or other
                                    trading activities and not acquired directly from the
                                    Company. CellNet has agreed that for a period of 90 days
                                    after the Expiration Date, it will make this Prospectus
                                    available to any broker-dealer for use in connection
                                    with any such resale. See "Plan of Distribution."
 
Expiration Date...................  5:00 p.m., New York City time, on June 28, 1997, unless
                                    the Exchange Offer is extended, in which case the term
                                    "Expiration Date" means the latest date and time to
                                    which the Exchange Offer is extended.
</TABLE>
 
                                       8
<PAGE>
 
<TABLE>
<S>                                 <C>
Accretion of the New Notes and the
  Old Notes.......................  No cash interest will accrue or be payable in respect of
                                    the New Notes prior to June 15, 2000. Thereafter,
                                    interest will accrue at the rate of 13% per annum,
                                    payable semiannually in arrears on each June 15 and
                                    December 15, commencing December 15, 2000. The Old Notes
                                    will continue to accrete at the rate of 13% per annum
                                    to, but excluding, the issuance date of the New Notes.
                                    The Old Notes accepted for exchange will cease to
                                    accrete upon cancellation of the Old Notes and issuance
                                    of the New Notes. The Accreted Value of the New Notes
                                    upon issuance will equal the Accreted Value of the Old
                                    Notes immediately prior to issuance of the New Notes.
 
Conditions to the Exchange
  Offer...........................  The Exchange Offer is subject to certain customary
                                    conditions. The conditions are limited and relate in
                                    general to proceedings which have been instituted or
                                    laws which have been adopted that might impair the
                                    ability of the Company to proceed with the Exchange
                                    Offer. As of December 30, 1996, none of these events had
                                    occurred, and the Company believes their occurrence to
                                    be to be unlikely. If any such conditions do exist prior
                                    to the Expiration Date, the Company may (i) refuse to
                                    accept any Old Notes and return all previously tendered
                                    Old Notes, (ii) extend the Exchange Offer or (iii) waive
                                    such conditions. See "The Exchange Offer--Conditions."
 
Procedures for Tendering Old
  Notes...........................  Each Holder of Old Notes wishing to accept the Exchange
                                    Offer must complete, sign and date the Letter of
                                    Transmittal, or a facsimile thereof, in accordance with
                                    the instructions contained herein and therein, and mail
                                    or otherwise deliver such Letter of Transmittal, or such
                                    facsimile, together with such Old Notes to be exchanged
                                    and any other required documentation to The Bank of New
                                    York, as Exchange Agent (the "Exchange Agent"), at the
                                    address set forth herein and therein or effect a tender
                                    of such Old Notes pursuant to the procedures for
                                    book-entry transfer as provided for herein. By executing
                                    the Letter of Transmittal, each Holder will represent to
                                    the Company that, among other things, the New Notes
                                    acquired pursuant to the Exchange Offer are being
                                    obtained in the ordinary course of business of the
                                    person receiving such New Notes, whether or not such
                                    person is the Holder, that neither the Holder nor any
                                    such other person has an arrangement or understanding
                                    with any person to participate in the distribution of
                                    such New Notes and that neither the Holder nor any such
                                    person is an "affiliate," as defined in Rule 405 under
                                    the Securities Act, of the Company. Each broker-dealer
                                    that receives New Notes for its own account in exchange
                                    for Old Notes, where such Old Notes were acquired by
                                    such broker-dealer as a result of market making
                                    activities or other trading activities and not acquired
                                    directly from the Company, must acknowledge that it will
                                    deliver a prospectus in connection with any resale of
                                    such New Notes. See "The Exchange Offer--Procedures for
                                    Tendering" and "Plan of Distribution."
</TABLE>
 
                                       9
<PAGE>
 
<TABLE>
<S>                                 <C>
Special Procedures for Beneficial
  Owners..........................  Any beneficial owner whose Old Notes are registered in
                                    the name of a broker, dealer, commercial bank, trust
                                    company or other nominee and who wishes to tender such
                                    Old Notes in the Exchange Offer should contact such
                                    registered Holder promptly and instruct such registered
                                    Holder to tender such Old Notes on such beneficial
                                    owner's behalf. If such beneficial owner wishes to
                                    tender on such beneficial owner's own behalf, such owner
                                    must, prior to completing and executing the Letter of
                                    Transmittal and delivering its Old Notes, either make
                                    appropriate arrangements to register ownership of the
                                    Old Notes in such beneficial owner's name or obtain a
                                    properly completed bond power from the registered
                                    Holder. The transfer of registered ownership may take
                                    considerable time and may not be able to be completed
                                    prior to the Expiration Date. See "The Exchange Offer--
                                    Procedures for Tendering."
 
Guaranteed Delivery Procedures....  Holders of Old Notes who wish to tender their Old Notes
                                    and whose Old Notes are not immediately available or who
                                    cannot deliver their Old Notes, the Letter of
                                    Transmittal or any other documents required by the
                                    Letter of Transmittal to the Exchange Agent, or cannot
                                    complete the procedure for book-entry transfer, prior to
                                    the Expiration Date must tender their Old Notes
                                    according to the guaranteed delivery procedures set
                                    forth in "The Exchange Offer--Guaranteed Delivery
                                    Procedures."
 
Withdrawal Rights.................  Tenders may be withdrawn at any time prior to 5:00 p.m.,
                                    New York City time, on the Expiration Date by delivering
                                    a written notice of such withdrawal to the Exchange
                                    Agent in conformity with certain procedures set forth
                                    below under "The Exchange Offer--Withdrawal of Tenders."
 
Acceptance of Old Notes and
  Delivery of New Notes...........  The Company will accept for exchange any and all Old
                                    Notes which are properly tendered in the Exchange Offer
                                    prior to 5:00 p.m., New York City time, on the
                                    Expiration Date. The New Notes issued pursuant to the
                                    Exchange Offer will be delivered promptly following the
                                    Expiration Date. Any Old Notes not accepted for exchange
                                    will be returned without expense to the tendering Holder
                                    thereof as promptly as practicable after the expiration
                                    or termination of the Exchange Offer. See "The Exchange
                                    Offer--Terms of the Exchange Offer."
 
Certain Tax Considerations........  The exchange pursuant to the Exchange Offer will not be
                                    a taxable event for federal income tax purposes. See
                                    "Certain United States Federal Income Tax
                                    Considerations."
 
Exchange Agent....................  The Bank of New York is serving as Exchange Agent in
                                    connection with the Exchange Offer.
</TABLE>
 
                                       10
<PAGE>
                               TERMS OF NEW NOTES
 
    The Exchange Offer applies to up to $325 million aggregate principal amount
at maturity of CellNet's Old Notes. The New Notes will be obligations of the
Company evidencing the same debt as the Old Notes and will be entitled to the
benefits of the same Indenture. See "Description of New Notes." The form and
terms of the New Notes are the same as the form and terms of the Old Notes in
all material respects except that the New Notes have been registered under the
Securities Act and hence do not include certain rights to registration
thereunder and do not contain transfer restrictions or terms with respect to the
special interest payments applicable to the Old Notes. See "Description of New
Notes."
 
<TABLE>
<S>                                 <C>
New Notes Offered.................  $325 million aggregate principal amount at maturity of
                                    13% Senior Discount Notes due June 15, 2005, Series B.
 
Accretion and Interest Payments...  No cash interest will accrue or be payable in respect of
                                    the New Notes prior to June 15, 2000. Thereafter,
                                    interest will accrue at the rate of 13% per annum and
                                    will be payable semiannually in arrears on each June 15
                                    and December 15, commencing December 15, 2000.
 
Maturity Date.....................  June 15, 2005.
 
Optional Redemption...............  The New Notes will be redeemable, in whole or in part,
                                    at the option of the Company, on or after June 15, 2000,
                                    at the redemption prices set forth herein plus accrued
                                    interest. On or prior to June 15, 1998, the Company may,
                                    at its option, redeem up to 25% of the aggregate
                                    principal amount of the New Notes originally issued at
                                    113% of the principal amount thereof plus accrued
                                    interest to the redemption date with the proceeds of one
                                    or more Public Equity Offerings; PROVIDED, HOWEVER, that
                                    in no event shall less than 75% of the outstanding
                                    aggregate Accreted Amount (if prior to June 15, 2000) or
                                    the aggregate principal amount (if on or after June 15,
                                    2000) of the New Notes be outstanding after any such
                                    redemption.
 
Mandatory Sinking Fund............  None.
 
Change of Control.................  In the event of a Change of Control, the Company will be
                                    obligated to make an offer to purchase all the New Notes
                                    then outstanding at a redemption price of 101% of the
                                    principal amount thereof plus accrued interest, if any,
                                    to the redemption date.
 
Ranking...........................  The New Notes will represent general unsecured senior
                                    obligations of the Company, and as such will be senior
                                    in right of payment to all existing and future
                                    subordinated debt of the Company and rank PARI PASSU
                                    with all other senior debt of the Company. However, the
                                    obligations of the Company under the New Notes will be
                                    effectively subordinated to all secured debt of the
                                    Company and all indebtedness of subsidiaries of the
                                    Company (including subordinated debt and trade
                                    payables). The Company conducts its domestic operations
                                    primarily through subsidiaries. The subsidiaries will
                                    not guarantee the New Notes. The Company and its
                                    subsidiaries had additional debt of $793,000 in the
                                    aggregate at June 30, 1996.
</TABLE>
 
                                       11
<PAGE>
 
<TABLE>
<S>                                 <C>
Certain Covenants.................  The Indenture contains certain covenants that, among
                                    other things, limit the ability of the Company and its
                                    subsidiaries to incur debt, issue certain preferred
                                    stock, create liens securing subordinated debt, sell or
                                    transfer assets, make restricted payments and engage in
                                    certain transactions with affiliates and certain
                                    mergers.
 
Exchange Rights...................  Holders of New Notes will not be entitled to any
                                    exchange or registration rights with respect to the New
                                    Notes. Holders of Old Notes are entitled to certain
                                    exchange rights pursuant to the Registration Rights
                                    Agreement. Under the Registration Rights Agreement, the
                                    Company is required to offer to exchange the Old Notes
                                    for new notes having substantially identical terms which
                                    have been registered under the Securities Act. This
                                    Exchange Offer is intended to satisfy such obligation.
                                    Once the Exchange Offer is consummated, the Company will
                                    have no further obligations to register any of the Old
                                    Notes not tendered by the Holders for exchange. See
                                    "Risk Factors--Consequences to Non-Tendering of Old
                                    Notes."
 
Use of Proceeds...................  The Company will not receive any proceeds from the
                                    Exchange Offer.
</TABLE>
 
            CERTAIN CONSEQUENCES OF A FAILURE TO EXCHANGE OLD NOTES
 
    The Old Notes have not been registered under the Securities Act or any state
securities laws and therefore may not be offered, sold or otherwise transferred
except in compliance with the registration requirements of the Securities Act
and any other applicable securities laws, or pursuant to an exemption therefrom
or in a transaction not subject thereto, and in each case in compliance with
certain other conditions and restrictions, including the Company's and the
Trustee's (as defined herein) right in certain cases to require the delivery of
opinions of counsel, certifications and other information prior to any such
transfer. Old Notes which remain outstanding after consummation of the Exchange
Offer will continue to bear a legend reflecting such restrictions on transfer.
In addition, upon consummation of the Exchange Offer, Holders of Old Notes which
remain outstanding will not be entitled to any rights to have such Old Notes
registered under the Securities Act or to any similar rights under the
Registration Rights Agreement (subject to certain limited exceptions applicable
solely to the Initial Purchaser). The Company currently does not intend to
register under the Securities Act any Old Notes which remain outstanding after
consummation of the Exchange Offer (subject to such limited exceptions, if
applicable).
 
    To the extent that Old Notes are tendered and accepted in the Exchange Offer
any trading market for Old Notes which remain outstanding after the Exchange
Offer could be adversely affected.
 
    The New Notes and any Old Notes which remain outstanding after consummation
of the Exchange Offer will vote together as a single class for purposes of
determining whether holders of the requisite percentage in outstanding principal
amount thereof have taken certain actions or exercised certain rights under the
Indenture. See "Description of New Notes."
 
    The Registration Rights Agreement relating to Old Notes provides that, if
the Exchange Offer were not consummated by June 15, 1998, the interest rate
borne by the Old Notes would increase by 0.50% per annum following June 15,
1998, until the Exchange Offer were consummated. See "Description of Old Notes."
Following consummation of the Exchange Offer, neither the Old Notes nor the New
Notes will be entitled to any increase in the interest rate thereon.
 
                                       12
<PAGE>
                 SUMMARY CONSOLIDATED FINANCIAL AND OTHER DATA
 
    The following table sets forth summary consolidated statement of operations
data and selected other data of the Company for each of the three years in the
period ended December 31, 1993, 1994 and 1995, and for the six months ended June
30, 1995 and 1996 and the consolidated balance sheet data at June 30, 1996. The
financial information data were derived from, and should be read in conjunction
with, "Management's Discussion and Analysis of Financial Condition and Results
of Operations" and the Consolidated Financial Statements of the Company and the
notes thereto included elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
                                                                                            SIX MONTHS ENDED JUNE
                                                              YEAR ENDED DECEMBER 31,                30,
                                                         ---------------------------------  ----------------------
                                                           1993        1994        1995        1995        1996
                                                         ---------  ----------  ----------  ----------  ----------
                                                                   (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                      <C>        <C>         <C>         <C>         <C>
CONSOLIDATED STATEMENT OF OPERATIONS DATA:
Revenues...............................................  $   1,757  $    1,651  $    2,126  $    1,291  $      420
Costs and expenses:
  Cost of revenues.....................................      1,840       1,191       5,129       1,931       3,483
  Research and development.............................      5,262       9,693      22,380       6,735      13,009
  Marketing and sales..................................      1,447       3,257       4,201       1,946       2,924
  General and administrative...........................      1,450       2,583       6,805       2,874       5,412
                                                         ---------  ----------  ----------  ----------  ----------
    Total costs and expenses...........................      9,999      16,724      38,515      13,486      24,828
Loss from operations...................................     (8,242)    (15,073)    (36,389)    (12,195)    (24,408)
                                                         ---------  ----------  ----------  ----------  ----------
Other income (expense).................................       (148)        441      (4,564)         75      (7,903)
                                                         ---------  ----------  ----------  ----------  ----------
Loss before income taxes...............................     (8,390)    (14,632)    (40,953)    (12,120)    (32,311)
Provision for income taxes.............................          1           2           3           1           2
                                                         ---------  ----------  ----------  ----------  ----------
Net loss...............................................  $  (8,391) $  (14,634) $  (40,956) $  (12,121) $  (32,313)
                                                         ---------  ----------  ----------  ----------  ----------
                                                         ---------  ----------  ----------  ----------  ----------
Pro forma net loss per share(1)........................                         $    (1.22)             $    (0.94)
                                                                                ----------              ----------
                                                                                ----------              ----------
Shares used in computing pro forma net loss per
  share(1).............................................                             33,497                  34,483
                                                                                ----------              ----------
                                                                                ----------              ----------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                  DECEMBER 31, 1995  JUNE 30, 1996
                                                                                  -----------------  -------------
<S>                                                                               <C>                <C>
SELECTED OTHER DATA:
Meters under contract(2)........................................................       1,070,000        1,220,000
Meters in revenue service(2)....................................................          17,559          105,354
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                      JUNE 30, 1996
                                                                         ----------------------------------------
                                                                                                         AS
                                                                           ACTUAL    PRO FORMA(3)   ADJUSTED(3)(4)
                                                                         ----------  -------------  -------------
                                                                                      (IN THOUSANDS)
<S>                                                                      <C>         <C>            <C>
CONSOLIDATED BALANCE SHEET DATA:
Cash, cash equivalents and short-term investments......................  $  102,967   $   104,158    $   223,968
Total assets...........................................................     162,653       163,844        283,654
Long-term obligations, including current portion.......................     195,513       195,513        195,513
Series CC redeemable convertible preferred stock.......................      29,486       --             --
Total stockholders' equity (deficit)...................................     (70,400)      (39,723)        80,087
</TABLE>
 
- ------------------------
 
(1) For an explanation of the determination of the number of shares used in
    computing pro forma net loss per share, see Note 1 to Consolidated Financial
    Statements.
 
                                       13
<PAGE>
(2) "Meters under contract" refers to the aggregate number of meters for which
    the Company has agreed to provide NMR services under services agreements
    with utilities and "Meters in revenue service" refers to the aggregate
    number of meters under contract which have been installed on the Company's
    networks and for which the Company is receiving NMR service revenues. As of
    August 31, 1996, the Company had 2,235,000 meters under contract and as of
    July 31, 1996, the Company had 143,415 meters in revenue service.
 
(3) Reflects, at the closing of the Company's initial public offering on October
    2, 1996 (the "Initial Public Offering"): (1) the conversion of all
    outstanding shares of Preferred Stock into Common Stock; (2) the exercise of
    warrants on a cash basis to purchase 495,918 shares of Common Stock at an
    aggregate exercise price of approximately $1.2 million; and (3) the issuance
    of 913,876 shares of Common Stock upon the net exercise of certain warrants.
    Also reflects the assumed exercise of warrants on a cash basis to purchase
    2,600,000 shares of Common Stock at an aggregate exercise price of $13,000
    within 270 days of October 2, 1996.
 
(4) Adjusted to reflect the proceeds of the Company's Initial Public Offering at
    an offering price of $20.00 per share and after deducting underwriting
    discounts and commissions and offering expenses payable by the Company. See
    "Use of Proceeds." Also reflects the sale of 1,579,404 shares of Common
    Stock pursuant to certain direct placements, less approximate issuance costs
    of $40,000 with respect to such purchases which also closed on October 2,
    1996.
 
                                       14
<PAGE>
                                  RISK FACTORS
 
    AN INVESTMENT IN THE NEW NOTES BEING OFFERED HEREBY INVOLVES A HIGH DEGREE
OF RISK. PROSPECTIVE INVESTORS SHOULD CAREFULLY CONSIDER THE FOLLOWING RISK
FACTORS, IN ADDITION TO THE OTHER INFORMATION CONTAINED IN THIS PROSPECTUS,
BEFORE EXCHANGING THE OLD NOTES FOR THE NEW NOTES OFFERED HEREBY. CERTAIN
INFORMATION CONTAINED IN THIS SECTION AND ELSEWHERE IN THIS PROSPECTUS,
INCLUDING INFORMATION WITH REGARD TO THE COMPANY'S EXPECTED WIRELESS
COMMUNICATIONS NETWORK DEPLOYMENTS AND OPERATIONS, ITS STRATEGY FOR MARKETING
AND DEPLOYING SUCH NETWORKS AND RELATED FINANCING ACTIVITIES CONTAINS
FORWARD-LOOKING STATEMENTS THAT INVOLVE RISKS AND UNCERTAINTIES. THE COMPANY'S
ACTUAL RESULTS MAY DIFFER MATERIALLY FROM THE RESULTS DISCUSSED IN SUCH
STATEMENTS. FACTORS THAT MIGHT CAUSE SUCH A DIFFERENCE INCLUDE, BUT ARE NOT
LIMITED TO, THOSE DISCUSSED IN "RISK FACTORS," "MANAGEMENT'S DISCUSSION AND
ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS" AND "BUSINESS."
 
HISTORY AND CONTINUATION OF OPERATING LOSSES
 
    The Company has incurred substantial and increasing operating losses since
inception. As of June 30, 1996, the Company had an accumulated deficit of $127.3
million, primarily resulting from expenses incurred in the development of the
Company's wireless data communications system, marketing of the Company's NMR,
distribution automation and other services, the installation of its wireless
data communications networks and the payment of other normal operating costs.
 
    The Company does not expect significant revenues during 1996 and expects to
incur substantial and increasing operating losses and negative net cash flow
after capital expenditures for the foreseeable future as it expands its research
and development and marketing efforts and installs additional networks. The
Company's network service revenues from a particular network are expected to lag
significantly behind network installation expenses until such network is
substantially complete. If the Company is able to deploy additional networks,
the losses created by this lag in revenues are expected to increase until the
revenues from the installed networks overtake the costs associated with the
deployment and operation of such additional networks. The Company does not
expect positive cash flow after capital expenditures from its NMR services
operations for several years. A large portion of the Company's limited revenues
to date has been attributable to miscellaneous equipment sales and development
and other contract revenues that are largely non-recurring and that the Company
expects to decrease and remain at relatively insignificant levels over the next
few years. See "Management's Discussion and Analysis of Financial Condition and
Results of Operations."
 
DEPENDENCE ON AND UNCERTAINTY OF UTILITY MARKET ACCEPTANCE
 
    The Company's success will be almost entirely dependent on whether a large
number of utility companies sign long-term services contracts with CellNet. Any
decision by a utility to utilize the Company's services will involve a
significant organizational, technological and financial commitment by such
utility. The utility industry is generally characterized by long purchasing
cycles and cautious decision making. Utilities typically go through numerous
steps before making a final purchase decision. These steps, which can take up to
several years to complete, may include the formation of a committee to evaluate
the purchase, the review of different technical options with vendors,
performance and cost justifications, regulatory review and the creation and
issuance of requests for quotes and proposals, as well as the utilities' normal
budget approval process. Purchases of the Company's services are, to a
substantial extent, deferrable in the event that utilities seek to reduce
capital expenditures. Outside of pilot trials, only five utilities (KCPL, UE,
and recently NSP, PG&E and Puget) have made a commitment to purchase the
Company's services to date, and there can be no assurance as to when or if the
Company will enter into additional services contracts or that any such agreement
would be on favorable terms to the Company. See "Business."
 
    Because automation of utility meter reading and distribution is a relatively
new and evolving market, it is difficult to predict the future growth rate and
size of this market. Utility companies are testing
 
                                       15
<PAGE>
products from various suppliers for various applications, and no industry
standard has been broadly adopted. The CellNet system is one possible solution
for automated meter reading and distribution automation. There can be no
assurance that the Company will be successful in achieving the large-scale
adoption of its system. In the event that the utility industry does not adopt
the Company's technology, or does so less rapidly than expected by the Company,
the Company's future results, including its ability to service its indebtedness
and achieve profitability, will be materially and adversely affected. In recent
competitive bids, potential utility customers have from time to time selected
competing systems to perform services offered by the Company. See
"Business--Competition."
 
UNCERTAINTY OF FUTURE REVENUES; INCREASING INSTALLATION COSTS; NEED FOR
  ADDITIONAL SERVICES CONTRACTS AND FLUCTUATING OPERATING RESULTS
 
    The timing and amount of future revenues will depend almost entirely upon
the Company's ability to obtain new services agreements with utilities and other
parties and upon the successful deployment and operation of the Company's
wireless data communications networks. The signing of any new services contracts
is expected to occur on an irregular basis, if at all. The Company expects that
it will generally take two to four years to complete the installation of each
network after a services contract has been signed. Service revenues from such
networks are not expected to exceed the Company's capital investments and
expenses incurred to deploy and operate such network for several years. The
Company will not begin to receive recurring revenues under a services contract
until portions of the network become operational, which is expected to occur no
earlier than six months after installation begins. The Company's results of
operations may be adversely affected by delays or difficulties arising in the
network installation process. The cost of network deployments will be highly
variable and depend upon a wide variety of factors, including radio frequency
characteristics, the size of a service territory and density of endpoints within
such territory, the nature and sophistication of services being provided, local
labor rates and other economic factors.
 
    CellNet currently derives almost all of its revenues from long-term services
contracts with KCPL and UE. The Company recently entered into services contracts
with NSP, PG&E and Puget. The Company will not generate sufficient cash flow to
service its indebtedness or achieve profitability unless it enters into a
significant number of additional services contracts. There can be no assurance
that the Company will complete commercial deployments of the CellNet system
under the KCPL, UE, NSP, PG&E and Puget contracts successfully or that it will
obtain enough additional contracts on satisfactory terms for network deployments
in a sufficient number of locations to allow the Company to achieve adequate
cash flow to service its indebtedness or achieve profitability. The Company's
operating results will fluctuate significantly in the future as a result of a
variety of factors, some of which are outside of the Company's control,
including the rate at which utilities and other customers enter into new
services contracts, general economic conditions, economic conditions in the
utility industry, the effects of governmental regulations and regulatory
changes, capital expenditures and other costs relating to the expansion of
operations, the introduction of new services by the Company or its competitors,
the mix of services sold, pricing changes and new service introductions by the
Company and its competitors and prices charged by suppliers. In response to a
changing competitive environment, the Company may elect from time to time to
make certain pricing, service or marketing decisions or enter into strategic
alliances or investments that could have a material adverse effect on the
Company's business, results of operations, financial condition and cash flow.
See "Management's Discussion and Analysis of Financial Condition and Results of
Operations."
 
UNCERTAINTY OF ACCEPTANCE OF AND DEPENDENCE ON OTHER APPLICATIONS
 
    The Company's long-term business plan contemplates offering non-utility
application services. The Company believes its future ability to service its
indebtedness and to achieve profitability will be significantly dependent on its
success in generating substantial revenues from such additional services. The
Company currently has no services contracts which provide for the implementation
of such services, and
 
                                       16
<PAGE>
the Company has not yet demonstrated an ability to deploy such services on a
commercial scale. In addition, unless utilities sign services contracts that
enable the Company to deploy its wireless networks in their service areas, the
Company may not be able to offer any such services in such areas or may be able
to offer these services only on a limited basis. See "Business--Business
Strategy--Promote Development of Non-Utility Applications" and
"Business--Wireless Communications Industry Overview."
 
SUBSTANTIAL LEVERAGE AND ABILITY TO SERVICE DEBT; SUBSTANTIAL FUTURE CAPITAL
  NEEDS
 
    The Company had outstanding indebtedness as of June 30, 1996 of
approximately $195.5 million, which included $194.7 million of the Company's
Notes. The Notes will accrete to $325.0 million by June 15, 2000. The Company
must begin paying cash interest on the Senior Discount Notes on December 15,
2000. The Company and its subsidiaries intend to incur substantial additional
indebtedness, primarily in connection with installing future networks. As a
result, the Company and its subsidiaries will have substantial debt service
obligations. The Company's capital expenditures will increase significantly if
new services contracts are signed, and the Company expects that its cash flow
taking into account capital expenditures will be increasingly negative over the
next several years. The ability of the Company to meet its debt service
requirements will depend upon achieving significant and sustained growth in the
Company's cash flow, which will be affected by its success in implementing its
business strategy, prevailing economic conditions and financial, business and
other factors, certain of which are beyond the Company's control. The Company's
ability to generate such cash flow is subject to a number of risks and
contingencies. Included among these risks are: (i) the possibilities that the
Company may not obtain sufficient additional services agreements or complete
scheduled installations on a timely basis, (ii) revenues may not be generated
quickly enough to meet the Company's operating costs and debt service
obligations, (iii) the Company's wireless systems could experience performance
problems or (iv) adoption of the Company's system could be less widespread than
anticipated. Accordingly, there can be no assurance as to whether or when the
Company's operations will generate positive cash flow or become profitable or
whether the Company or its subsidiaries will at any time have sufficient
resources to meet their debt service obligations. If the Company is unable to
generate sufficient cash flow to service its indebtedness, it will have to
reduce or delay planned capital expenditures, sell assets, restructure or
refinance its indebtedness or seek additional equity capital. There can be no
assurance that any of these strategies could be effected on satisfactory terms,
if at all, particularly in light of the Company's high levels of indebtedness.
In addition, the degree to which the Company is leveraged could have significant
consequences, including, but not limited to, the following: (i) the Company's
ability to obtain additional financing in the future for working capital,
capital expenditures, research and development, acquisitions, and other general
corporate purposes may be materially limited or impaired, (ii) a substantial
portion of the Company's cash flow from operations must be dedicated to the
payment of principal and interest on its indebtedness and therefore cannot be
used in the Company's business and (iii) the Company's high degree of leverage
may make it more vulnerable to economic downturns, may limit its ability to
withstand competitive pressures and may reduce its flexibility in responding to
changing business and economic conditions.
 
    The Company will require substantial additional funds for the development,
commercial deployment and expansion of its networks, as well as to fund
operating losses. As of August 31, 1996, the Company had $88.5 million in cash,
cash equivalents and short-term investments. On October 2, 1996, the Company
completed its Initial Public Offering in which it sold 5,000,000 shares of its
Common Stock at an offering price of $20 per share for net proceeds of
$91,850,000 after deducting underwriting discounts and commisions and estimated
offering expenses payable by the Company. In addition, on October 2, 1996, the
Company completed certain direct placements in which it sold 1,579,404 shares of
its Common Stock for net proceeds of $28,000,000, less estimated issuance costs
of $40,000. The Company believes that its existing cash, cash equivalents and
short-term investments and anticipated interest income and other revenues, will
be sufficient to meet its cash requirements for at least the next 12 months.
Thereafter, the Company expects that it will require substantial additional
capital. Depending upon the number and timing of any new services agreements and
upon the associated network deployment costs and schedules, the
 
                                       17
<PAGE>
Company may require additional equity or debt financing earlier than estimated
in order to fund its working capital and other requirements. Future financings
may be dilutive to existing stockholders. There can be no assurance that
additional financing will be available when required or, if available, that it
will be on terms satisfactory to the Company. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations--Liquidity and Capital
Reserves."
 
    Substantially all of the operations of the Company are and will be conducted
through subsidiaries. Nonetheless, the Company has incurred significant
indebtedness at the holding company level, and intends to incur substantial
additional holding company indebtedness. The ability of the Company to service
such indebtedness will depend on the availability of income and cash flow from
its subsidiaries for distribution to the holding company. Such availability will
depend on a number of factors, including the terms of financing agreements
entered into by the Company's subsidiaries and restrictions arising under the
laws of the jurisdictions wherein those subsidiaries conduct their businesses.
The Company's subsidiaries are separate and distinct legal entities and have no
obligation, contingent or otherwise, to pay any amounts due on the Company's
indebtedness or to make any funds available therefor, whether in the form of
loans, dividends or otherwise. Any default in the payment of its debt
obligations could seriously impair the value of the Common Stock.
 
    In the event that the Company is unable to generate sufficient cash flow and
is otherwise unable to obtain funds necessary to meet required payments on its
indebtedness, the Company could be in default under the terms of the agreements
governing such indebtedness. In the event of such default, the holders of such
indebtedness would have certain enforcement rights, including the right to
accelerate such debt and the right to commence an involuntary bankruptcy
proceeding against the Company. In any such proceeding, the holders of the
Company's debt would be entitled to receive payment of their claims prior to any
distributions to equity holders. In addition, any holders of secured
indebtedness of the Company and its subsidiaries would have certain rights to
repossess, foreclose upon and sell the assets securing such indebtedness. See
"Management; Discussion and Analysis of Financial Condition and Results of
Operations."
 
SUBSTANTIAL AND INCREASING COMPETITION
 
    The emerging market for utility NMR systems, and the potential market for
other applications once a common infrastructure is in place, have led
electronics, communications and utility product companies to begin developing
various systems, some of which currently compete, and others of which may in the
future compete, with the CellNet system. The Company believes that its only
significant direct competitor in the marketplace at present is Itron, Inc.
("Itron"), an established manufacturer and seller of hand-held and drive-by
automated meter reading equipment to utilities. Itron has announced the
development of its Genesis-TM- system, a radio network system similar to the
Company's, for meter reading purposes and is presently offering that system in
the marketplace. The Company believes that Itron has signed at least two
contracts with utilities for the commercial installation of its Genesis-TM-
system.
 
    There may be many potential alternative solutions to the Company's NMR
services including traditional wireless solutions. Metricom, Inc., a provider
primarily of subscriber-based, wireless data communications for users of
portable and desktop computers; First Pacific Networks, a provider primarily of
bandwidth efficient wireline communications technology; and Lucent Technologies
are examples of companies whose technology might be adapted for NMR and who may
become direct competitors of the Company in the future. Schlumberger is
developing a fixed network system in cooperation with Motorola for meter reading
as well. Schlumberger, Lucent Technologies and First Pacific Networks either
have conducted, or are in the process of conducting, pilot trials of utility
network automation systems. Established suppliers of equipment, services and
technology to the utility industry such as Asea Brown Boveri and General
Electric could expand their current product and service offerings so as to
compete directly with the Company, although they have not yet done so. Many of
the Company's present and potential future competitors have substantially
greater financial, marketing, technical and manufacturing
 
                                       18
<PAGE>
resources, name recognition and experience than the Company. The Company's
competitors may be able to respond more quickly to new or emerging technologies
and changes in customer requirements or to devote greater resources to the
development, promotion and sale of their products and services than the Company.
While CellNet believes its technology is widely regarded as competitive at the
present time, there can be no assurance that the Company's competitors will not
succeed in developing products or technologies that are better or more cost
effective. In addition, current and potential competitors may make strategic
acquisitions or establish cooperative relationships among themselves or with
third parties that increase their ability to address the needs of the Company's
prospective customers. Accordingly, it is possible that new competitors or
alliances among current and new competitors may emerge and rapidly gain
significant market share. In addition, if the Company achieves significant
success it could draw additional competitors into the market. Traditional
providers of wireless services may in the future choose to enter the Company's
markets. Such existing and future competition could materially adversely affect
the pricing for the Company's services and the Company's ability to sign
long-term contracts and maintain existing agreements with utilities. Competition
for services relating to non-utility applications may be more intense than
competition for utility NMR services. There can be no assurance that the Company
will be able to compete successfully against current and future competitors, and
any failure to do so would have a material adverse effect on the Company's
business, operating results, financial condition and cash flow. See
"Business--Competition."
 
TECHNOLOGICAL PERFORMANCE AND BUILD-OUT OF THE SYSTEM; RAPID TECHNOLOGICAL
  CHANGE AND UNCERTAINTY
 
    The Company's initial target market is the monitoring, control and
automation of utility companies' electric, gas and water distribution networks.
Although the CellNet system (including both NMR services and distribution
automation) has been deployed commercially with more than 105,000 meters in
revenue service as of June 30, 1996, there can be no assurance that unforeseen
problems will not develop with respect to the Company's technology, products or
services, or that the Company will be successful in completing the development
and commercial implementation of its technology on a wider scale. The Company
must complete a number of technical development projects and continue to expand
and upgrade its capabilities in connection with such commercial implementation,
the success of which cannot be assured. While the Company believes that it has
developed the necessary hardware to install its endpoint devices on most of the
standard electromechanical electric meters manufactured by the four largest U.S.
electric meter manufacturers, there can be no assurance that the Company will be
able to develop successfully a full range of endpoint devices required by
utilities. The Company must also develop the hardware enhancements necessary to
utilize its system on a commercial basis with gas and water meters. The
Company's future success will be materially adversely affected if it is not
successful or is significantly delayed in the completion of its hardware
development programs.
 
    The Company's future success will also depend, in part, on its ability to
enhance its existing hardware, software and wireless communications technology.
The telecommunications industry has been characterized by rapid, significant
technological advances. The advent of computer-linked electronic networks, fiber
optic transmission, advanced data digitization technology, cellular and
satellite communications capabilities and personal communications systems
("PCS") have radically expanded communications capabilities and market
opportunities. Future advances may render the Company's technology obsolete or
less cost effective than competitive systems or erode the Company's market
position. Many companies from diverse industries are seeking solutions for the
transmission of data over traditional communications media, including radio, as
well as more recently developed media such as cellular and PCS-based networks.
Competitors may be capable of offering significant cost savings or other
benefits to the Company's customers, and there can be no assurance that the
Company will maintain competitive services or obtain appropriate new
technologies on a timely basis or on satisfactory terms. See "Business--Wireless
Communications Industry Overview."
 
                                       19
<PAGE>
    The necessary development effort will require the Company to make continued
substantial investments. The Company has encountered product development delays
in the past affecting both software and hardware components of its system. See
"Business--Research and Development."
 
ACCESS TO RADIO FREQUENCY ("RF") SPECTRUM; REGULATION BY THE FEDERAL
  COMMUNICATIONS COMMISSION ("FCC")
 
    The Company will attempt to obtain exclusive usage of licensed bandwidth
and/or secure its own licenses. CellNet licenses radio spectrum for its wireless
networks in the top 60 MSAs in the U.S. sufficient to support its projected
utility and non-utility applications with a margin for future growth. Enough
frequency spectrum may not be available to fully enable the delivery of all or a
part of the Company's wireless data communications services or the Company may
be required to find alternative frequencies. The cost of obtaining such spectrum
is currently difficult to estimate and may involve time delays and/or increased
cost to the Company. The Company could also be unable to obtain frequency in
certain areas. Any of these circumstances could have a material adverse impact
on the Company's future ability to provide its network services and on the
Company's business, operating results, financial condition and cash flow. See
"Business--Regulation."
 
    The Company's network equipment uses radio spectrum and, as such, is subject
to regulation by the FCC. In addition, CellNet intends to provide services as a
private carrier. This status allows services to be provided pursuant to
individual contracts without becoming subject to many of the statutory
requirements and FCC and state regulations that govern the provision of common
carrier services. The Company's network equipment uses both licensed RF spectrum
allocated for multiple address system ("MAS") operations in the 928/952 MHz band
and unlicensed spectrum in the 902-928 MHz band. In order to obtain a license to
operate the Company's network equipment in the 928/952 MHz band, license
applicants may need to obtain a waiver of various sections of the FCC's rules.
Although the Company has obtained such waivers for its licensed systems
routinely in the past, and expects the required waivers to be granted on a
routine basis in the future, there can be no assurance that the Company will be
able to obtain such waivers on a timely basis or to obtain them at all. In
addition, as the amount of spectrum in the 928/952 MHz band is limited, issuance
of these licenses is contingent upon the availability of spectrum in the area(s)
for which the licenses are requested. The Company might not be able to obtain
licenses to the spectrum it needs in every area in which it has prospective
customers. The FCC's rules, subject to a number of limited exceptions, permit
third parties such as CellNet to operate on spectrum licensed to utilities to
provide other services. The Company plans to use these provisions of the FCC's
rules to expand its CellNet system.
 
    The FCC requires that a minimum configuration of an MAS system be in
operation within eighteen months from the initial date of the grant of the
system authorization or risk forfeiture of the license for the MAS frequencies.
The eighteen-month deadline may be extended upon showing of good cause, but
there is no assurance that the FCC will grant any such extension. The Company is
responding to this requirement by selectively building out transmission capacity
in some areas where it does not yet have utility telecommunications services
contracts and may permit licenses to lapse in certain areas.
 
    No license is needed to operate the Company's equipment utilizing the
902-928 MHz band, although the equipment must be certified by the Company and
the FCC as being compliant with certain FCC restrictions on radio frequency
emissions designed to protect licensed services from objectionable interference.
While the Company believes it has obtained all required certifications for its
products, the FCC could modify the limits imposed on such products or otherwise
impose new authorization requirements, and in either case, such changes could
have a material adverse impact on the Company's business. The FCC recently
completed a new rulemaking proceeding designed to better accommodate the
cohabitation in the 902-928 MHz band of existing licensed services with newly
authorized and expanded uses of licensed systems, and existing and newly
designed unlicensed devices like those used by the Company. In this proceeding,
the FCC expressly recognized the rights of such unlicensed services to operate
under certain
 
                                       20
<PAGE>
delineated operating parameters even if the potential for interference to the
licensed operations exists. The Company's systems will operate within those
specified parameters. The FCC retains the right to modify those rules or to
allow for other uses of this spectrum that might create interference to the
Company's systems, which could, in either case, have a material adverse impact
on the Company's business, operating results, financial condition and cash flow.
 
    While the Company intends to offer non-utility services as a private carrier
and in accordance with FCC Rules, each such service offering would need to be
reviewed relative to these rules. The FCC's rules currently prohibit the use of
the MAS frequencies on which the Company is operating its systems for the
provision of common carrier service offerings. In the event that it is
determined that a particular service offering does not comply with the rules,
the Company may be required to restructure such offering or to utilize other
frequencies for the purpose of providing such service. There can be no assurance
that the Company will gain access to such other frequencies. Future
interpretation of regulations by the FCC or changes in the regulation of the
Company's industry by the FCC or other regulatory bodies or legislation by
Congress could have a material adverse effect on the Company's business,
operating results, financial condition and cash flow. See
"Business--Regulation."
 
MANAGEMENT OF GROWTH; DEPENDENCE ON KEY PERSONNEL
 
    The Company's recent growth has placed, and is expected to continue to
place, a significant strain on its managerial, operational and financial
resources. The Company's ability to manage growth effectively will require it to
continue to implement and improve its operational and financial systems and to
expand, train and manage its employee base. These demands are expected to
require the addition of new management personnel and the development of
additional expertise by existing management personnel. There can be no assurance
that the Company will be able to effectively manage the expansion of its
operations, that its systems, procedures or controls will be adequate to support
the Company's operations or that Company management will be able to exploit
opportunities for the Company's services. An inability to manage growth, if any,
could have a material adverse effect on the Company's business, results of
operations, financial condition and cash flow. See "Management."
 
    The success of the Company is substantially dependent on its key management
and technical personnel, the loss of one or more of whom could adversely affect
the Company's business. All of the Company's employees and officers are employed
on an at-will basis. Presently, the Company does not maintain a "key man" life
insurance policy on any of its executives or employees. The Company's future
success also depends on its continuing ability to identify, hire, train and
retain other highly qualified technical and managerial personnel. Competition
for such personnel is intense, and there can be no assurance that the Company
will be able to attract or retain highly qualified technical and managerial
personnel in the future. An inability to attract and retain the necessary
technical and managerial personnel could have a material adverse effect on the
Company's business, operating results, financial condition and cash flow. See
"Business--Employees" and "Management."
 
UNCERTAINTY OF PROTECTION OF COPYRIGHTS, PATENTS AND PROPRIETARY RIGHTS
 
    The Company relies on a combination of trade secret protection, copyright,
patent, trademark and confidentiality agreements and licensing arrangements to
establish and protect its proprietary rights. The Company's success will depend
in part on its ability to maintain copyright and patent protection for its
products, to preserve its trade secrets and to operate without infringing the
proprietary rights of third parties. While the Company has obtained and applied
for patents, and intends to file applications as appropriate for patents
covering its products and processes, there can be no assurance that additional
patents will be issued or, if issued, that the scope of any patent protection
will be significant, or that any patents issued to the Company or licensed by
the Company will not be challenged, invalidated or circumvented, or that the
rights granted thereunder will provide proprietary protection to the Company.
 
                                       21
<PAGE>
Since U.S. patent applications are maintained in secrecy until patents are
issued, and since publication of inventions in the technical or patent
literature tend to lag behind such inventions by several months, CellNet cannot
be certain that it was the first creator of inventions covered by its issued
patents or pending patent applications, that it was the first to file patent
applications for such inventions or that no patent conflict will exist with
other products or processes which could compete with the Company's products or
approach. Despite the Company's efforts to safeguard and maintain these
proprietary rights, there can be no assurance that the Company will be
successful or that the Company's competitors will not independently develop
patent technologies that are substantially equivalent or superior to the
Company's technologies. Participants in the wireless industry, including
competitors of the Company, typically seek to obtain patents which will provide
as broad protection as possible for their products and processes. There is a
substantial backlog of patents at the U.S. Patent Office. It is uncertain
whether any such third-party patents will require the Company to alter its
products or processes, obtain licenses or cease certain activities. An adverse
outcome with regard to a third-party patent infringement claim could subject the
Company to significant liabilities, require disputed rights to be licensed or
restrict the Company's ability to use such technology. The Company also relies
to a substantial degree upon unpatented trade secrets, and no assurance can be
given that others, including the Company's competitors, will not independently
develop or otherwise acquire substantially equivalent trade secrets. In
addition, whether or not additional patents are issued to the Company, others
may receive patents which contain claims applicable to products or processes
developed by the Company. If any such claims were to be upheld, the Company
would require licenses, and no assurance can be given that licenses would be
available on acceptable terms, if at all. In addition, the Company could incur
substantial costs in defending against suits brought against it by others for
infringement of intellectual property rights or in prosecuting suits which the
Company might bring against other parties to protect its intellectual property
rights. From time to time the Company receives inquiries with respect to the
coverage of its intellectual property rights, and there can be no assurance that
such inquiries will not develop into litigation. See "Business--Proprietary
Rights."
 
    In October 1996, Itron, Inc., one of the Company's competitors, filed a
complaint against the Company in the Federal District Court in Minnesota,
alleging that the Company infringes an Itron patent which was issued in
September 1996. Itron is seeking a judgment for damages, attorneys fees and
injunctive relief. The Company believes, based on information currently known,
that the Company's products do not infringe any valid claim in the Itron patent,
and in the Company's opinion, the ultimate outcome of the lawsuit is not
expected to have a material adverse effect on its results of operations or
financial condition. See "Business--Litigation."
 
    Although the Company has been granted federal registration of its "CellNet"
trademark, another Company has filed a petition for cancellation in an attempt
to challenge such registration which, if successful, would mean the Company
could lose its registration and be required to adopt a new trademark and
possibly a new or modified corporate name. CellNet could encounter similar
challenges to its trademark and corporate name in the future. While the
requirement to adopt a new trademark or new or modified corporate name could
involve a significant expense and could result in the loss of any goodwill and
name recognition associated with the Company's current trademark and corporate
name, the Company does not believe this would have a long-term material adverse
impact on its business, operating results, financial condition and cash flow.
See "Business--Litigation."
 
DEPENDENCE ON THIRD-PARTY MANUFACTURERS; EXPOSURE TO COMPONENT SHORTAGES
 
    The Company relies and will continue to rely on outside parties to
manufacture a majority of its network equipment such as radio devices and
printed circuit boards. As the Company signs additional services contracts,
there will be a significant ramp-up in the amount of manufacturing by third
parties in order to enable the Company to meet its contractual commitments. The
Company currently relies on single manufacturers for radio devices and for
printed circuit boards. There can be no assurance that these manufacturers will
be able to meet the Company's manufacturing needs in a satisfactory and timely
 
                                       22
<PAGE>
manner or that the Company can obtain additional manufacturers when and if
needed. Although the Company believes alternative manufacturers are available,
an inability of the Company to develop alternative suppliers quickly or
cost-effectively could materially impair its ability to manufacture and install
systems. The Company's reliance on third-party manufacturers involves a number
of additional risks, including the absence of guaranteed capacity and reduced
control over delivery schedules, quality assurance, production yields and costs.
Although the Company believes that these manufacturers would have an economic
incentive to perform such manufacturing for the Company, the quality, amount and
timing of resources to be devoted to these activities is not within the control
of the Company, and there can be no assurance that manufacturing problems will
not occur in the future. A significant price increase, a quality control
problem, an interruption in supply from one or more of such manufacturers or the
inability to obtain additional manufacturers when and if needed could have a
material adverse effect on the Company's business, operating results, financial
condition and cash flow. See "Business--Manufacturing and Operations."
 
    Certain of the Company's subassemblies, components and network equipment are
procured from single sources and others are procured only from a limited number
of sources. In addition, CellNet may be affected by general shortages of certain
components, such as surface mounted integrated circuits and memory chips. There
have been shortages of such materials generally in the marketplace from time to
time in the past. The Company's reliance on such components and on a limited
number of vendors and subcontractors involves certain risks, including the
possibility of shortages and reduced control over delivery schedules,
manufacturing capability, quality and cost. A significant price increase or
interruption in supply from one or more of such suppliers could have a material
adverse effect on the Company's business, operating results, financial condition
and cash flow. Although the Company believes alternative suppliers of
sub-assemblies, components and network equipment are available, the inability of
the Company to develop alternative sources quickly or cost-effectively could
materially impair its ability to manufacture and install systems. Lead times can
be as long as a year for certain components, which may require the Company to
use working capital to purchase inventory significantly in advance of receiving
any revenues. See "Business--Manufacturing and Operations."
 
DEPENDENCE ON BUSINESS ALLIANCES
 
    A key element of the Company's business strategy is the formation of
corporate alliances with leading companies. The Company is currently investing,
and plans to continue to invest, significant resources to develop these
relationships. The Company believes that its success in penetrating markets for
non-utility applications of its network will depend in large part on its ability
to maintain these relationships and to cultivate additional or alternative
relationships. There can be no assurance that the Company will be able to
develop additional corporate alliances with such companies, that existing
relationships will continue or be successful in achieving their purposes or that
such companies will not form competing arrangements. See "Business--Business
Strategy--Form Strategic Alliances."
 
POSSIBLE TERMINATION OF LONG-TERM CONTRACTS
 
    The Company expects that substantially all of its future revenues will be
provided pursuant to long-term services contracts with utility companies and
other parties. These contracts will generally be subject to cancellation or
termination in certain circumstances in the event of a material and continuing
failure on CellNet's part to meet agreed NMR performance standards on a
consistent basis over agreed time periods, subject to certain rights to cure any
such failure. Each of the Company's existing services contracts also provides
for termination of such contracts by the respective utility without cause in
less than ten years, subject to certain reimbursement provisions. Such contracts
also provide that CellNet will be required to compensate such utilities for the
use of its system for non-utility applications. In the event that a services
contract is terminated by a utility, the Company would incur substantial losses.
A network's service revenues are not expected to exceed the Company's capital
investments to deploy such network for several years. Termination or
cancellation of one or more utility services contracts would have a material
adverse
 
                                       23
<PAGE>
effect on the Company's business, results of operations, financial condition and
cash flow. See "Business-- Current Utility Services Agreements."
 
RISKS ASSOCIATED WITH INTERNATIONAL EXPANSION
 
    The Company plans to expand into international markets and has begun initial
marketing efforts. The Company does not anticipate that it will have any
material international operations in the next 12 months. If revenues generated
by international activities are not adequate to offset the expense of
establishing and maintaining these activities, the Company's business, operating
results, financial condition and cash flow could be materially adversely
affected. International demand for the Company's services and systems is
expected to vary by country, based on such factors as the regulatory
environment, electric power generating capacity and demand, labor costs and
other political and economic conditions. To date, the Company has no experience
in developing a localized version of its wireless data communications system for
foreign markets. The Company believes its ability to establish business
alliances in each international market will be critical to its success. There
can be no assurance that the Company will be able to successfully develop,
market and implement its system in international markets or establish successful
business alliances for these markets. In addition, there are certain risks
inherent in doing business internationally, such as unexpected changes in
regulatory requirements, export restrictions, tariffs and other trade barriers,
difficulties in staffing and managing foreign operations, longer payment cycles,
problems in collecting accounts receivable, political instability, fluctuations
in currency exchange rates and potentially adverse tax consequences, any of
which could adversely impact the Company's potential international operations.
There can be no assurance that one or more of such factors will not have a
material adverse effect on the Company's future international operations and,
consequently, on its business, operating results, financial condition and cash
flow. See "Business--Business Strategy--Pursue Internal Expansion."
 
    The Company's strategy is to pursue international markets through a proposed
joint venture with BEn which could involve additional partners in a local
operating project entity in a particular country. The Company may not have a
majority interest or control of the board of directors of any such local
operating project entity. The risk is present in any such joint venture in which
the Company may determine to participate, that the other joint venture partner
may at any time have economic, business or legal interests or goals that are
inconsistent with those of the joint venture or the Company. The risk is also
present that a joint venture partner may be unable to meet its economic or other
obligations and that the Company may be required to fulfill those obligations.
In addition, in any joint venture in which the Company does not have a majority
interest, the Company may not have control over the operations or assets of such
joint venture. See "Business--Business Strategy--Pursue Internal Expansion."
 
ABSENCE OF PUBLIC MARKET FOR THE NOTES
 
    The New Notes are being offered to the Holders of the Old Notes. Prior to
this Exchange Offer, there has been no public market for the Old Notes. Prior to
Exchange Offer there are no New Notes. The Company does not intend to apply for
listing of the New Notes on any securities exchange or for quotation through the
Nasdaq National Market. The Initial Purchaser has informed the Company that it
currently intends to make a market for the New Notes. However, the Initial
Purchaser is not obligated to do so and any such market making may be
discontinued at any time without notice. Therefore, no assurance can be given as
to whether an active trading market will develop or be maintained for the New
Notes. If the New Notes are traded after their initial issuance they may trade
at a discount from their initial offering price, depending on prevailing
interest rates, the market for similar securities and other factors, including
the financial condition, performance and prospects of the Company.
 
CONSEQUENCES TO NON-TENDERING HOLDERS OF OLD NOTES
 
    Upon consummation of the Exchange Offer, the Company will have no further
obligation to register the Old Notes. Thereafter, any Holder of Old Notes who
does not tender its Old Notes in the Exchange
 
                                       24
<PAGE>
Offer, including any Holder which is an "affiliate" (as that term is defined in
Rule 405 of the Securities Act) of the Company which cannot tender its Old Notes
in the Exchange Offer, will continue to hold restricted securities which may not
be offered, sold or otherwise transferred, pledged or hypothecated except
pursuant to Rule 144 and Rule 144A under the Securities Act or pursuant to any
other exemption from registration under the Securities Act relating to the
disposition of securities, provided that an opinion of counsel is furnished to
the Company that such an exemption is available.
 
HOLDING COMPANY STRUCTURE; DEPENDENCE OF COMPANY ON SUBSIDIARIES FOR REPAYMENT
  OF NOTES;
  EFFECTIVE SUBORDINATION OF NOTES TO INDEBTEDNESS OF SUBSIDIARIES
 
    The Notes will be obligations of the Company exclusively. Substantially all
of the operations of the Company are and will be conducted through direct and
indirect subsidiaries. The Company's cash flow and, consequently, its ability to
service debt, including the Notes, will depend upon the cash flow of its
subsidiaries and the payment of funds by those subsidiaries to the Company in
the form of loans, dividends or otherwise. The subsidiaries are separate and
distinct legal entities and have no obligation, contingent or otherwise, to pay
any amounts due pursuant to the Notes or to make any funds available therefor,
whether in the form of loans, dividends or otherwise. In addition, the Company's
subsidiaries are likely to become parties to financing arrangements in
connection with the development of the wireless systems, which may contain
limitations on the ability of such subsidiaries to pay dividends or to make
loans or advances to the Company. In the event of any insolvency, bankruptcy or
similar proceedings, creditors of the subsidiaries would generally be entitled
to priority over holders of the Notes with respect to the assets of the affected
subsidiary. See "Description of Old Notes--Limitation on Dividend and Other
Payment Restrictions Affecting Restricted Subsidiaries."
 
    Because the Company is a holding company that conducts and will conduct its
business through its subsidiaries, all existing and future liabilities of the
Company's subsidiaries, including trade payables, will be effectively senior to
the Notes. The Indenture limits, but does not prohibit, the incurrence of
additional indebtedness by the Company and its subsidiaries. See "Description of
Old Notes--Limitation on Indebtedness and Preferred Stock."
 
RANKING OF NOTES
 
    The Notes will be senior obligations of the Company ranking PARI PASSU in
right of payment as to all existing and future indebtedness of the Company,
other than indebtedness that is expressly subordinated to the Notes. Upon
consummation of the offering made hereby, the Company will have no indebtedness
outstanding that is subordinated to the Notes, and no senior indebtedness, other
than the Notes. However, the Company and its subsidiaries may incur substantial
additional indebtedness, including indebtedness which is secured by assets of
the Company and its subsidiaries. Any holders of secured indebtedness of the
Company would be entitled to payment of their indebtedness out of the proceeds
of their collateral prior to the holders of any general unsecured obligations of
the Company, including the Notes, and any holders of indebtedness of
subsidiaries of the Company would generally be entitled to repayment of such
indebtedness from the assets of the affected subsidiaries before such assets
were made available for distribution to the Company. Similarly, in the event of
any distribution or payment of the assets of the Company in any foreclosure,
dissolution, winding-up, liquidation or reorganization, holders of any secured
indebtedness will have a secured prior claim to the assets of the Company that
constitute their collateral and holders of subsidiary indebtedness would be
entitled to prior repayment of their claims from the assets of the relevant
subsidiary. In the event of bankruptcy, liquidation or reorganization of the
Company, holders of the Notes will participate ratably with all holders of
senior unsecured indebtedness of the Company which is deemed to be of the same
class as the Notes, and potentially with all other general creditors of the
Company, based upon the respective amounts owed to each holder or creditor, in
the remaining assets of the Company. In any of the foregoing events, there can
be no assurance that there would be sufficient assets to pay amounts due on the
Notes.
 
                                       25
<PAGE>
FRAUDULENT TRANSFER AND PREFERENCE CONSIDERATIONS
 
    Under applicable provisions of the federal bankruptcy law or comparable
provisions of state fraudulent transfer law, if the Company, at the time of
issuance of, or making any payment in respect of, the Notes, (a)(i) was or was
rendered insolvent thereby, was engaged or about to engage in a business or
transaction for which its assets constituted unreasonably small capital, or
intended to incur, or believed that it would incur, debts beyond its ability to
pay such debts as they matured, and (ii) the Company received less than
reasonably equivalent value or fair consideration for such issuance, or (b) the
Company issued the Notes or made any payment thereunder with intent to hinder,
defraud or delay any of its creditors, the obligations of the Company under some
or all of the Notes could be avoided or held to be unenforceable by a court, the
obligations of the Company under the Notes could be subordinated to claims of
other creditors or the holders could be required to return payments already
received. In particular, if the Company were to cause a subsidiary to make a
dividend in order to enable the Company to make payments in respect of the
Notes, and such transfer constituted a fraudulent transfer the holders could be
required to return the payment. In any of the foregoing cases, there could be no
assurance that the holders would ultimately recover the amounts owing under the
Notes. In addition, under the preference law of the State of New York, if the
Company were to issue the Notes or make any payment in respect thereof in
contemplation of insolvency, the Notes could be avoided or amounts paid to the
holders could be required to be returned.
 
    The measure of insolvency for purposes of the foregoing will vary depending
upon the law applied in any such case. Generally, however, the Company would be
considered insolvent if the sum of its debts, including contingent liabilities,
was greater than all of its assets at a fair valuation or if the present fair
saleable value of its assets was less than the amount that would be required to
pay the probable liability on its existing debts, including contingent
liabilities, as they become absolute and matured.
 
    The Company believes that it will not be insolvent at the time of or as a
result of any of the offerings made hereby, that it will not engage in a
business or transaction for which its assets constitute unreasonably small
capital, and that it did not and does not intend to incur or believe that it
will incur debts beyond its ability to pay such debts as they mature. These
beliefs are based on internal cash flow projections and estimated value of
assets and liabilities. There can be no assurance, however, that a court passing
on such questions would agree with the Company's analysis.
 
ORIGINAL ISSUE DISCOUNT
 
    The Notes will be issued at a substantial discount from their principal
amount at maturity. Although cash interest will not be payable in respect of the
Notes prior to December 15, 2000, Original Issue Discount (the difference
between the stated redemption price at maturity of the Notes and the issue price
of the Notes) will accrue from the issue date of the Notes and generally will be
includable as interest income in the Note holder's gross income for United
States federal income tax purposes in advance of the cash payments to which the
income is attributable.
 
    Furthermore, the Notes will be subject to the high yield discount obligation
rules which will defer and may in part eliminate the Company's ability to deduct
the Original Issue Discount attributable to the Notes. Accordingly, the
Company's after tax cash flow might be less than if the Original Issue Discount
on the Notes was deductible when it accrued. See "Certain Federal Income Tax
Considerations--Notes-- Applicable High Yield Discount Obligations." Similar
results may apply under state tax laws.
 
    If a bankruptcy case were commenced by or against the Company under the
Federal Bankruptcy Code of 1978, as amended (the "Bankruptcy Code"), after the
issuance of the Notes, the claim of a holder is the sum of: (i) the initial
offering price and (ii) that portion of the Original Issue Discount that is not
deemed to constitute "unmatured interest" for purposes of the Bankruptcy Code.
Any Original Issue Discount that was not accrued as of the date of any such
bankruptcy filing would constitute "unmatured interest."
 
                                       26
<PAGE>
                                USE OF PROCEEDS
 
    This Exchange Offer is intended to satisfy certain of the Company's
obligations under the Registration Rights Agreement. CellNet will not receive
any cash proceeds from the issuance of the New Notes offered in the Exchange
Offer. In consideration for issuing the New Notes as contemplated in this
Prospectus, the Company will receive in exchange Old Notes in like principal
amount, the form and terms of which are the same in all material respects as the
form and terms of the New Notes except that the New Notes have been registered
under the Securities Act and hence do not include certain rights to registration
thereunder. The Old Notes surrendered in exchange for New Notes will be retired
and canceled and cannot be reissued. Accordingly, issuance of the New Notes will
not result in any increase in the indebtedness of the Company.
 
    Net proceeds from the sale of the Old Notes (after the deduction of
placement fees and other expenses of the offering of the Old Notes) were
approximately $172 million. Such proceeds have been and will be used for general
corporate purposes, including working capital, capital requirements (capital
expenditures and negative operating cash flow) expected to be incurred in
connection with the installation and operation of the Company's networks and
continuing research and development activities. Pending application of the
proceeds as described above, the Company has invested the net proceeds of the
issuance of the Old Notes in short-term, interest-bearing, investment-grade
securities.
 
                                DIVIDEND POLICY
 
    The Company has not declared or paid any dividends on its capital stock
since its inception. The Company currently anticipates that it will retain all
of its future earnings, if any, for use in the operation and expansion of its
business and does not anticipate paying any cash dividends in the foreseeable
future, and any changes in the Company's dividend policies will be determined by
its Board of Directors. The Company's existing financing arrangements also
restrict the payment of any dividends. The Company anticipates that it and its
subsidiaries will incur substantial additional indebtedness, which is also
likely to restrict the payment of dividends.
 
                                       27
<PAGE>
                                 CAPITALIZATION
 
    The following table sets forth (i) the capitalization of the Company as of
June 30, 1996, (ii) the pro forma capitalization of the Company in connection
with the Company's Initial Public Offering after giving effect to the automatic
conversion of all outstanding shares of Preferred Stock into Common Stock, the
issuance of 913,876 shares of Common Stock upon the net exercise of certain
warrants, the issuance of 3,095,918 shares of Common Stock upon the exercise on
a cash basis of certain outstanding warrants for aggregate proceeds to the
Company of $1.2 million and the reincorporation of the Company in Delaware which
occurred on August 30, 1996, and (iii) the as adjusted capitalization of the
Company to reflect the receipt of the net proceeds from the sale of Common Stock
in the Initial Public Offering thereof at the initial offering price of $20.00
per share and after deducting estimated underwriting discounts and commissions
and estimated offering expenses payable by the Company and the receipt of the
net proceeds of $27.96 million from the sale of Common Stock to NSP, UE and BEn
which occurred on October 2, 1996.
 
<TABLE>
<CAPTION>
                                                                                        JUNE 30, 1996
                                                                            -------------------------------------
                                                                              ACTUAL      PRO FORMA   AS ADJUSTED
                                                                            -----------  -----------  -----------
                                                                                       (IN THOUSANDS)
<S>                                                                         <C>          <C>          <C>
Notes(1)..................................................................  $   194,720  $   194,720   $ 194,720
                                                                            -----------  -----------  -----------
Capital lease obligations(2)..............................................          793          793         793
                                                                            -----------  -----------  -----------
Series CC redeemable convertible preferred stock, $.001 par value;
  3,215,768 shares designated and outstanding actual; no shares
  outstanding pro forma and as adjusted...................................       29,486      --           --
Stockholders' equity (deficit):
Convertible preferred stock, $.001 par value; 15,000,000 shares
  authorized; 9,137,078 shares outstanding actual; no shares outstanding
  pro forma and as adjusted...............................................       27,196      --           --
Common Stock, $.001 par value; 50,000,000 shares authorized; 5,209,472
  shares outstanding actual; 33,924,958 shares outstanding pro forma(3);
  and 100,000,000 shares authorized and 40,504,362 shares outstanding as
  adjusted(4).............................................................       27,636       88,484     208,294
Notes receivable from sale of Common Stock................................         (866)        (866)       (866)
Warrants..................................................................        2,984            9           9
Accumulated deficit.......................................................     (127,334)    (127,334)   (127,334)
Net unrealized loss on short-term investments.............................          (16)         (16)        (16)
                                                                            -----------  -----------  -----------
Total stockholders' equity (deficit)......................................      (70,400)     (39,723)     80,087
                                                                            -----------  -----------  -----------
Total capitalization......................................................  $   154,599  $   155,790   $ 275,600
                                                                            -----------  -----------  -----------
                                                                            -----------  -----------  -----------
</TABLE>
 
- ------------------------
 
(1) See Note 5 to Consolidated Financial Statements.
 
(2) See Note 9 to Consolidated Financial Statements.
 
(3) Excludes 3,779,136 shares of Common Stock issuable upon the exercise of
    outstanding options as of June 30, 1996, with a weighted average exercise
    price of $.625 per share and 52,610 shares of Common Stock issuable upon
    exercise of outstanding warrants to purchase Common Stock at a weighted
    average exercise price of $7.59 per share. See "Management--Incentive Stock
    Plans," "Description of Capital Stock--Warrants" and Note 7 to Consolidated
    Financial Statements.
 
(4) Upon the closing of the Company's Initial Public Offering of its Common
    Stock, 100,000,000 shares of Common Stock were authorized for issuance.
 
                                       28
<PAGE>
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
    The following selected consolidated financial data should be read in
conjunction with the Company's Consolidated Financial Statements and related
Notes thereto and "Management's Discussion and Analysis of Financial Condition
and Results of Operations" included elsewhere in this Prospectus. The
consolidated statement of operations data for the years ended December 31, 1993,
1994 and 1995, and the consolidated balance sheet data at December 31, 1994 and
1995 are derived from, and are qualified by reference to, the audited
consolidated financial statements included elsewhere in this Prospectus. The
consolidated statement of operations data for the years ended December 31, 1991
and 1992 and the consolidated balance sheet data at December 31, 1991, 1992 and
1993 are derived from audited consolidated financial statements not included
herein. The consolidated statement of operations data for the six months ended
June 30, 1995 and 1996 and the consolidated balance sheet data at June 30, 1996
are derived from unaudited consolidated financial statements that include, in
the opinion of management, all adjustments, consisting of only normal, recurring
adjustments, necessary for a fair presentation of the information set forth
therein. The consolidated results of operations for the six months ended June
30, 1996 or any other period are not necessarily indicative of future results.
 
<TABLE>
<CAPTION>
                                                                                                  SIX MONTHS
                                                 YEAR ENDED DECEMBER 31,                        ENDED JUNE 30,
                                ----------------------------------------------------------  ----------------------
                                   1991        1992        1993        1994        1995        1995        1996
                                ----------  ----------  ----------  ----------  ----------  ----------  ----------
                                          (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                             <C>         <C>         <C>         <C>         <C>         <C>         <C>
CONSOLIDATED STATEMENT OF
 OPERATIONS DATA:
  Revenues....................  $    7,408  $    3,148  $    1,757  $    1,651  $    2,126  $    1,291  $      420
  Costs and expenses:
  Cost of revenues............       6,943       2,509       1,840       1,191       5,129       1,931       3,483
  Research and development....       7,765       6,838       5,262       9,693      22,380       6,735      13,009
  Marketing and sales.........       3,037       1,523       1,447       3,257       4,201       1,946       2,924
  General and
    administrative............       2,048         843       1,450       2,583       6,805       2,874       5,412
                                ----------  ----------  ----------  ----------  ----------  ----------  ----------
  Total costs and expenses....      19,793      11,713       9,999      16,724      38,515      13,486      24,828
                                ----------  ----------  ----------  ----------  ----------  ----------  ----------
  Loss from operations........     (12,385)     (8,565)     (8,242)    (15,073)    (36,389)    (12,195)    (24,408)
  Other income (expense)......        (178)       (378)       (148)        441      (4,564)         75      (7,903)
                                ----------  ----------  ----------  ----------  ----------  ----------  ----------
  Loss before income taxes....     (12,563)     (8,943)     (8,390)    (14,632)    (40,953)    (12,120)    (32,311)
  Provision for income
    taxes.....................      --          --               1           2           3           1           2
                                ----------  ----------  ----------  ----------  ----------  ----------  ----------
  Net loss....................  $  (12,563) $   (8,943) $   (8,391) $  (14,634) $  (40,956) $  (12,121) $  (32,313)
                                ----------  ----------  ----------  ----------  ----------  ----------  ----------
                                ----------  ----------  ----------  ----------  ----------  ----------  ----------
  Pro forma net loss per
    share(1)..................                                                  $    (1.22)             $    (0.94)
                                                                                ----------              ----------
                                                                                ----------              ----------
  Shares used in computing pro
    forma net loss per
    share(1)..................                                                      33,497                  34,483
                                                                                ----------              ----------
                                                                                ----------              ----------
</TABLE>
 
                                       29
<PAGE>
 
<TABLE>
<CAPTION>
                                                        DECEMBER 31,                              JUNE 30, 1996
                                   -------------------------------------------------------  --------------------------
                                     1991       1992       1993        1994        1995       ACTUAL     PRO FORMA(2)
                                   ---------  ---------  ---------  ----------  ----------  -----------  -------------
                                                       (IN THOUSANDS)
<S>                                <C>        <C>        <C>        <C>         <C>         <C>          <C>
CONSOLIDATED BALANCE SHEET DATA:
  Cash, cash equivalents and
    short-term investments.......  $     669  $   2,236  $   8,884  $   24,508  $  143,797  $   102,967   $   104,158
  Total assets...................      4,833      4,123     11,510      31,809     184,306      162,653       163,844
  Long-term obligations,
    including current portion....      1,598      1,734        825         546     183,348      195,513       195,513
  Series CC redeemable
    convertible preferred
    stock........................     --         --         --          29,486      29,486       29,486       --
  Total stockholders' equity
    (deficit)....................     (3,065)      (235)     8,011      (1,564)    (38,103)     (70,400)      (39,723)
</TABLE>
 
- ------------------------
 
(1) See Note 1 to Consolidated Financial Statements for an explanation of the
    determination of the number of shares used in computing pro forma net loss
    per share.
 
(2) Reflects, at the closing of the Company's Initial Public Offering: (1) the
    conversion of all outstanding shares of Preferred Stock into Common Stock;
    (2) the exercise of warrants on a cash basis to purchase 495,918 shares of
    Common Stock at an aggregate exercise price of approximately $1.2 million;
    and (3) the issuance of 913,876 shares of Common Stock upon the net exercise
    of certain warrants. Also reflects the assumed exercise of warrants on a
    cash basis to purchase 2,600,000 shares of Common stock at an aggregate
    exercise price of $13,000 within 270 days of October 2, 1996.
 
                                       30
<PAGE>
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
    THE FOLLOWING DISCUSSION OF THE FINANCIAL CONDITION AND RESULTS OF
OPERATIONS OF CELLNET DATA SYSTEMS, INC. SHOULD BE READ IN CONJUNCTION WITH THE
CONSOLIDATED FINANCIAL STATEMENTS AND RELATED NOTES THERETO INCLUDED ELSEWHERE
IN THIS PROSPECTUS. CERTAIN OF THE INFORMATION CONTAINED IN THIS SECTION AND
ELSEWHERE IN THIS PROSPECTUS, INCLUDING INFORMATION WITH REGARD TO THE COMPANY'S
EXPECTED WIRELESS DATA COMMUNICATIONS NETWORK DEPLOYMENTS AND OPERATIONS, ITS
STRATEGY FOR MARKETING AND DEPLOYING SUCH NETWORKS AND RELATED FINANCING
ACTIVITIES, CONTAIN FORWARD-LOOKING STATEMENTS THAT INVOLVE RISKS AND
UNCERTAINTIES. THE COMPANY'S ACTUAL RESULTS MAY DIFFER SIGNIFICANTLY FROM
RESULTS DISCUSSED IN THE FORWARD-LOOKING STATEMENTS. FACTORS THAT MIGHT CAUSE
SUCH DIFFERENCES INCLUDE, BUT ARE NOT LIMITED TO, THOSE DISCUSSED IN "RISK
FACTORS."
 
OVERVIEW
 
    The Company intends to deploy and operate a series of wireless data
communications networks pursuant to long-term contracts with utility company
customers and to earn recurring revenues by providing NMR services to the
utilities and using the network to support a variety of non-utility
applications. The Company's business strategy has affected and will continue to
affect its financial condition and results of operations as follows:
 
    CHANGING COMPOSITION OF REVENUES.  The Company's revenues in recent years
have been primarily attributable to sales of, and contract fees related to the
development of, miscellaneous utility communication equipment. The Company
believes that such revenues will be largely non-recurring and will diminish to
relatively insignificant levels over the next few years. The Company derives an
increasing proportion of its revenues from fees earned under services agreements
related to its wireless communications networks. Under the Company's existing
services agreements with KCPL, UE, NSP, PG&E and Puget, the Company receives
monthly NMR service fees based on the number of endpoint devices that are in
revenue service during the applicable month to bill customers.
 
    UNEVEN REVENUE GROWTH.  The timing and amount of the Company's future
revenues will depend upon its ability to obtain additional services agreements
with utilities and other customers and upon the Company's ability to
successfully deploy and operate its wireless communications networks. New
services agreements are expected to be obtained on an irregular basis, and there
may be prolonged periods during which the Company does not enter into any
additional services agreements. As a result, the Company expects that its
revenues will not grow smoothly over time, but will increase unevenly as the
Company enters into new services agreements, and may decrease sharply in the
event that any of its existing services agreements are terminated or not
renewed. See "Risk Factors--Uncertainty of Future Revenues; Increasing
Installation Costs; Need for Additional Services Contracts; and Fluctuating
Operating Results."
 
    REVENUES LAG NETWORK DEPLOYMENT.  The Company generally realizes network
service revenue under a services agreement with a utility only when a portion of
the network is installed and the utility has begun billing customers based upon
NMR data. The Company expects that its receipt of network service revenue will
lag the signing of the related services agreements by a minimum of six months
and that it will generally take two to four years to complete installation of a
network after each services agreement has been signed. A network's service
revenues are not expected to exceed the Company's capital investments and
expenses incurred to deploy such network for several years. The Company signed
agreements with KCPL and UE in August 1994 and August 1995, respectively, and
did not receive its first revenue under the KCPL and UE services agreements
until September 1995 and May 1996, respectively. The Company expects
substantially to complete the installation of its NMR network for KCPL by the
end of 1996. At that time, the Company expects to have approximately 355,000
automated meters installed on the KCPL network, all of which are expected to be
in revenue service by the end of the first quarter 1997. The Company also
expects that approximately 50,000 additional automated meters will be installed
on the KCPL network during 1997 and added to the total number of meters in
revenue service upon acceptance by KCPL for billing purposes. The Company is in
the process of reviewing with KCPL the remaining meters (approximately 15,000)
under contract with KCPL in order to determine the number which should be
automated and/or read manually.
 
                                       31
<PAGE>
The Company expects substantially to complete the UE network in 1998. The
Company began the installation of both the NSP and Puget networks in August
1996. As additional segments of the Company's networks are installed and used by
its utility clients for billing purposes, the Company expects to realize a
corresponding increase in its network service revenues. However, if the Company
is able to successfully deploy an increasing number of networks over the next
few years, the operating losses created by this lag in revenues, and negative
cash flow resulting from such operating losses and the capital expenditures
expected to be required in connection with the installation of such networks,
are expected to widen for a period of time and will continue until the operating
cash flow from installed networks exceeds the costs of deploying and operating
additional networks.
 
    IMPACT OF RAPID EXPANSION.  CellNet will not typically invest the capital
necessary to deploy a wireless communications network prior to entering into a
long-term services agreement with a utility or other customer. However, during
its expansion phase, the Company will be required to invest significant amounts
of capital in its networks and to incur substantial and increasing sales and
marketing expenses before receiving any return on such expenditures through
network service revenues. The Company has incurred substantial operating losses
since inception and, as of June 30, 1996, had an accumulated deficit of $127.3
million. The Company does not expect significant revenues during 1996 and
expects to incur substantial and increasing operating losses and negative net
cash flow after capital expenditures for the foreseeable future as it expands
its research and development and marketing efforts and installs additional
networks. The Company does not expect positive cash flow after capital
expenditures from its NMR services operations for several years. The Company
will require substantial capital to fund cash flow deficits and capital
expenditures for the foreseeable future and expects to finance these
requirements through significant additional external financing. See "Risk
Factors--History and Continuation of Operating Losses" and "--Substantial
Leverage and Ability to Service Debt; Substantial Future Capital Needs."
 
    INTEREST INCOME.  The Company has earned substantial amounts of interest
income on short-term investments of the proceeds of its financing activities,
and expects to earn additional interest income through the investment of a
portion of the proceeds of this Offering. The Company expects to utilize
substantially all of its cash, cash equivalents and short-term investments in
deploying its wireless communications networks, in continuing research and
development activities related thereto and in related selling and marketing
activities. As such funds are expended, interest income is expected to decrease.
See "Use of Proceeds."
 
RESULTS OF OPERATIONS
 
    REVENUES
 
    Revenues for the three years ended December 31, 1993, 1994 and 1995 were
$1.8 million, $1.7 million and $2.1 million, respectively. Revenues for the six
months ended June 30, 1995 and 1996 were $1.3 million and $420,000,
respectively. Revenues prior to 1996 were attributable primarily to product
sales and development and other contract revenues unrelated to the Company's
current focus of providing NMR services that were largely non-recurring and that
are expected to decline and remain at relatively insignificant levels over the
next few years. During 1993, Pacific Gas & Electric Company ("PG&E"), Georgia
Power Company ("Georgia Power") and NSP accounted for 37%, 36% and 18% of the
Company's revenues, respectively. During 1994, NSP, Georgia Power and PG&E
accounted for 58%, 14% and 10% of the Company's revenues, respectively. During
the first six months of 1996, KCPL and NSP accounted for 73% and 16% of the
Company's revenues, respectively. During 1995, NSP and KCPL accounted for 64%
and 29% of the Company's revenues, respectively. Revenues for the six months
ended June 30, 1996 declined $870,000 from the comparable period in 1995. The
decline resulted primarily from the transition from product sales to network
service revenues. The Company's NMR service revenues for the year ended December
31, 1995 and for the six months ended June 30, 1996 were $35,000 and $244,000,
respectively. In September 1995, the Company began to receive regular monthly
revenue under its services agreement with KCPL based upon the number of
automated meters installed on the network that were
 
                                       32
<PAGE>
being used by KCPL to bill its customers and the agreed monthly NMR charge per
meter. In May 1996, the Company began to realize regular monthly revenue from
its services agreement with UE on a similar basis. The Company will not
recognize revenue earned under its services agreements with NSP or Puget until
the automated meters installed on the respective networks are used by such
utility clients for billing their respective customers. In connection with the
NSP Purchase, the Company has placed shares in escrow ("Escrow Shares") which
will be released upon the entering into an NMR services agreement with WEPC by
December 1997. The fair value of these Escrow Shares will be expensed as a sales
discount over the term of the WEPC services agreement if such event occurs.
 
    The Company generally realizes service revenues under its services
agreements with utilities only when its networks or portions thereof are
successfully installed and operating and the utility commences billing its
customers based upon the NMR data obtained. Revenues are expected to increase as
the Company continues to install its networks, the networks or portions thereof
become operational, and utilities begin billing their customers based upon data
obtained over the CellNet system. Due primarily to the nature, amount and timing
of revenues received to date, no meaningful period-to-period comparisons can be
made. Revenues received during the years ended December 31, 1993, 1994 and 1995,
and for the six-month periods ended June 30, 1995 and 1996, respectively, are
not reliable indicators of revenues that might be expected in the future.
 
    COST OF REVENUES
 
    Cost of revenues historically have consisted of the cost of product sales.
For the year ended December 31, 1995 and for the six months ended June 30, 1996,
cost of revenues primarily consisted of network operations costs. Cost of
revenues were $1.8 million, $1.2 million and $5.1 million for the years ended
December 31, 1993, 1994 and 1995, respectively. Cost of revenues for the six
months ended June 30, 1995 and 1996 were $1.9 million and $3.5 million,
respectively. The increase in cost of revenues was driven by increasing costs of
providing network services, due primarily to growth in the number of employees
and associated costs necessary for network monitoring operations at customer
sites and at the Company's headquarters, network deployment management and
customer training. Costs of network services also include the increased
installation, applications and RF engineering staffing at the Company's
headquarters to support anticipated additional utility contracts. Network
services do not currently generate a profit as the Company has not yet achieved
a scale of services sufficient to cover network costs. The Company will incur
significant and increasing costs primarily attributed to network operation and
depreciation. Once a network has been fully installed, costs associated with
generating network revenues will consist primarily of maintaining a monitoring
center for such network, network depreciation and miscellaneous maintenance and
operating expenses.
 
    OPERATING EXPENSES
 
    Operating expenses, consisting of research and development, marketing and
sales, and general and administrative costs, were $8.2 million, $15.5 million
and $33.4 million for the years ended December 31, 1993, 1994 and 1995,
respectively. Operating expenses for the six months ended June 30, 1995 and 1996
were $11.6 million and $21.3 million, respectively. The increase in operating
expenses on a period to period basis is attributable to the Company's rapid
growth and to increasing research and development and marketing and sales
expenditures. The Company expects to continue to spend a significant portion of
its resources on research and development activities for the foreseeable future.
Marketing and sales and general and administrative costs are expected to
increase in the future as the Company seeks to sign new service agreements.
 
    RESEARCH & DEVELOPMENT.  Research and development expenses are attributable
largely to continuing system software, firmware and equipment development costs,
prototype manufacturing, testing, personnel costs, consulting fees, and
supplies. Research and development costs are expensed as incurred. The Company's
networks include certain software applications which are integral to their
operation. The costs to develop such software have not been capitalized as the
Company believes its software development is
 
                                       33
<PAGE>
essentially completed when technological feasibility of the software and/or
development of the related network hardware is established. Research and
development expenses were $5.3 million, $9.7 million and $22.4 million for the
years ended December 31, 1993, 1994 and 1995, respectively. Research and
development expenses for the six months ended June 30, 1995 and 1996 were $6.7
million and $13.0 million, respectively. Research and development spending
increases in 1995 and 1996 reflect primarily additions to the Company's
engineering staff and costs associated with development of processes to retrofit
utility meters for use in the CellNet network. Deployment of the Company's first
network in 1995 resulted in increased materials used for prototypes,
nonrecurring engineering charges associated with establishing relationships with
third-party manufacturers and rapid changes to the firmware and software
utilized in the CellNet network. The Company expects that research and
development expenses will increase in the near term on account of additional
investments in research and development projects and in connection with the
establishment of international operations.
 
    MARKETING & SALES.  Marketing and sales expenses consist principally of
compensation, including commissions paid to sales and marketing personnel,
travel, advertising, trade show and other promotional costs. Marketing and sales
expenses were $1.4 million, $3.3 million and $4.2 million for the years ended
December 31, 1993, 1994 and 1995, respectively. Marketing and sales expenses for
the six months ended June 30, 1995 and 1996 were $1.9 million and $2.9 million,
respectively. The Company expects marketing and sales expenses to continue to
increase in absolute dollars as the Company seeks to enter into new services
agreements.
 
    GENERAL & ADMINISTRATIVE.  General and administrative expenses include
compensation paid to general management and administrative personnel, recruiting
costs, travel, and communications and other general administrative expenses,
including fees for professional services. General and administrative expenses
were $1.5 million, $2.6 million and $6.8 million for the years ended December
31, 1993, 1994 and 1995, respectively. General and administrative expenses for
the six months ended June 30, 1995 and 1996 were $2.9 million and $5.4 million,
respectively. The Company expects general and administrative expenses to
continue to increase in absolute dollars as the Company increases staffing and
continues developing information systems to support its planned growth. The
Company may need to increase administrative expenditures in the longer term to
expand domestic and establish international operations.
 
    INTEREST INCOME AND EXPENSE
 
    Prior to June 1995 the Company funded its liquidity needs primarily from the
issuance of equity securities. In June and November 1995, the Company issued and
sold a total of $325.0 million aggregate principal amount at maturity of Senior
Discount Notes and Note Warrants for proceeds, net of issuance costs, of $169.9
million. Accordingly, the Company has earned interest income on the invested
proceeds from the Senior Discount Notes and Note Warrants and has incurred
significant interest expense from the amortization of the original issue
discount on such debt.
 
    Interest income has been and will continue to be received by the Company
from the short-term investment of proceeds from the issuance of equity and debt
securities pending the use of such proceeds by the Company for capital
expenditures and operating and other expenses. In June 1995, the Company began
to receive substantially increased amounts of interest income on the short-term
investment of the proceeds received from the issue and sale of its Notes and
warrants issued pursuant to the Warrant Agreement dated as of June 15, 1995 and
as supplemented by the First Supplemental Warrant Agreement dated November 21,
1995, each as amended between the Company and The Bank of New York (the "Note
Warrants"). Interest income is expected to be highly variable over time as
proceeds from the issue and sale of additional equity and debt securities are
received and as funds are used by the Company in its business. Interest income
for the three years ended December 31, 1993, 1994 and 1995 was $66,000, $555,000
and $4.6 million, respectively. Interest income for the six months ended June
30, 1995 and 1996 was $1.0 million and $3.5 million, respectively.
 
                                       34
<PAGE>
    No interest on the Notes is payable prior to December 15, 2000. Thereafter
until maturity in June 2005, interest will be payable semi-annually in arrears
on each December 15 and June 15. The carrying amount of the Notes accretes from
the date of issue and the Company's interest expense includes such accretion.
Interest expense for periods prior to June 1995 was attributable primarily to
capital leases. Interest expense was $198,000, $101,000 and $9.3 million for the
years ended December 31, 1993, 1994 and 1995, respectively. Interest expense for
the six months ended June 30, 1995 and 1996 was $754,000 and $11.3 million,
respectively.
 
    PROVISION FOR INCOME TAXES
 
    The Company has not provided for or paid federal income taxes due to the
Company's net losses. A nominal provision has been recorded for various state
minimum income and franchise taxes.
 
    At December 31, 1995, the Company had net operating loss carryforwards of
approximately $82.5 million and $7.3 million available to offset future federal
and California taxable income, respectively. The extent to which the loss
carryforwards can be used to offset future taxable income will be limited
because of the ownership changes within any three-year period as provided in the
Tax Reform Act of 1986 and the California Conformity Act of 1987. The Initial
Public Offering triggered such a limitation as a result of which the annual
usage will be limited by the market value of the Company at the closing of the
Initial Public Offering multiplied by the then current long-term tax exempt
interest rate. Such federal carryforwards expire in 2001 through 2010. Such
state carryforwards expire in 1996 through 2000. Based upon the Company's
history of operating losses and expiration dates of the loss carryforwards, the
Company has recorded a valuation allowance to the full extent of its net
deferred tax assets.
 
LIQUIDITY AND CAPITAL RESOURCES
 
    The Company requires significant amounts of capital for research and
development in connection with the development of its proprietary wireless
communications network and related products and services, for investments in the
installation and testing of such networks and for related sales and marketing
and general and administrative expenses. Historically, the Company has satisfied
its liquidity requirements primarily through external financings, including
private placements of equity and debt securities and interest income derived
from the investment of the proceeds of its financing activities. The discussion
in this section excludes the exercise on a cash basis of warrants to purchase
495,918 shares of Common Stock at an aggregate exercise price of approximately
$1.2 million on the closing of the Initial Public Offering, the issuance of
913,876 shares of Common Stock upon the net exercise of certain warrants at the
closing of the Initial Public Offering, and the effect of Note Warrants to
purchase 2,600,000 shares of Common Stock, which the Company assumes will be
exercised on a cash basis within 270 days the closing of the Initial Public
Offering for expected proceeds of $13,000.
 
    In 1993, 1994, 1995 and the first six months of 1996, net cash used in the
Company's operating activities totaled $9.1 million, $14.6 million, $24.6
million and $18.9 million, respectively. Net cash used in operating activities
resulted primarily from cash used to fund net operating losses.
 
    In 1993, 1994 and 1995 and the first six months of 1996, net cash provided
by (used for) the Company's financing activities totaled $16.2 million, $34.0
million, $170.9 million and $(131,000), respectively, including cash provided by
the private sale of the Company's equity securities of $13.4 million, $34.1
million and $1.4 million in 1993, 1994 and 1995, respectively. In June and
November 1995, the Company received an aggregate of $175.8 million of gross
proceeds ($169.9 million in net proceeds) from the private sale of the Notes and
Note Warrants. During the first six months of 1996, the Company financed its
operations primarily from the proceeds of the offering of the Notes and Note
Warrants, together with interest income of $3.5 million. In September 1996, NSP,
UE and BEn signed agreements to purchase shares of Common Stock concurrent with
the closing of the Offering at an estimated aggregate purchase price of
$28,000,000. As of June 30, 1996, the Company had cash, cash equivalents and
short-term
 
                                       35
<PAGE>
investments totalling $103.0 million. The Company continues to utilize cash in
its operating and investing activities and had cash, cash equivalents and
short-term investments of $88.5 million at August 31, 1996. On October 2, 1996,
the Company completed its Initial Public Offering in which it sold 5,000,000
shares of its Common Stock at an offering price of $20 per share for net
proceeds of $91,850,000 after deducting underwriting discounts and commissions
and estimated offering expenses payable by the Company. In addition, on October
2, 1996, the Company completed certain direct placements in which it sold
1,579,404 shares of its Common Stock for net proceeds of $28,000,000, less
estimated issuance costs of $40,000.
 
    The Notes were issued at a substantial discount from their aggregate
principal amount at maturity of $325.0 million. Although interest is not payable
on the Notes prior to December 15, 2000, the carrying amount of such
indebtedness will increase as the original issue discount is amortized through
maturity in June 2005. Beginning June 15, 2000, the Notes will bear interest,
payable semi-annually, at a rate of 13% per annum, with payments commencing
December 15, 2000. No principal payments on the Notes are due prior to maturity
in 2005.
 
    In 1993, 1994 and 1995, net cash used for investing activities totaled $3.4
million, $12.8 million and $110.8 million, respectively and in the first six
months of 1995, net cash used in investing activities was $36.6 million and in
the first six months of 1996, net cash provided from investing activities was
$41.7 million. The Company's investing activities consisted primarily of
purchases of network components and inventory, the construction and installation
of networks, purchases of property and equipment, and purchases, sales and
maturities of short-term investments. The $41.7 million of net cash provided by
investing activities in the first six months of 1996 was largely attributable to
proceeds of short-term investments. These proceeds exceed investments in
short-term instruments as the Company used the proceeds of short-term
investments to fund its operating activities. The Company shortened the maturity
of its portfolio of short-term investments to less than 90 days, which are
classified, accordingly, as cash equivalents.
 
    Deployments of the Company's wireless communications networks will require
substantial additional capital. In addition, funds will be required for further
enhancements to the system software, firmware, hardware and other equipment to
increase the speed, capacity and functionality of the system, to enhance system
productivity over time and to expand the scope of utility and other network
information services that may be offered on the CellNet system. The Company
expects that cash used for the construction and installation of networks and for
the purchase of property and equipment will increase substantially as and when
the Company obtains new services agreements, and that the Company will require
significant amounts of additional capital from external sources. Sources of
additional capital may include project or conventional bank financing, public
and private offerings of debt and equity securities and cash generated from
operating activities. To provide financing for installation of the Company's
network under its UE services agreement, the Company has received a commitment
from Toronto Dominion Bank for $25.0 million for a nine-year and three-month
secured revolving credit facility on conventional bank financing terms. This
commitment is subject to standard conditions including satisfactory
documentation. The Company will pay Toronto Dominion Bank fees of up to $500,000
in connection with this facility. This facility is expected to require the
Company's St. Louis operations to meet certain revenue requirements and to limit
the capital expenditures and indebtedness of such operations. The Company
expects that a substantial portion of its future financing will be at the
subsidiary level on a project basis. The Company expects to obtain third party
financing for the construction of wireless networks, based on the projected cash
flow expected to be generated from such projects, after it has entered into a
long-term contract with a utility. The Company expects that the recurring
revenue stream from the long-term services contract will support the
amortization of debt raised for the project involved. The Company does not
anticipate deriving any significant cash from such operations for several years.
 
    The Company believes that existing cash, cash equivalents and anticipated
interest income and other revenues, will be sufficient to meet its cash
requirements for at least the next 12 months. Thereafter, the Company expects
that it will require substantial additional capital. The extent of additional
financing will
 
                                       36
<PAGE>
depend on the success of the Company's business. The Company expects to incur
significant operating losses and to generate increasingly negative net cash flow
during the next several years while it develops and installs its network
communications systems. There can be no assurance that additional financing will
be available to the Company or, if available, that it can be obtained on terms
acceptable to the Company and within the limitations contained in the Indenture
or that may be contained in any additional financing arrangements. The Indenture
contains certain covenants that limit the Company's ability to incur additional
indebtedness. Future financings may be dilutive to existing stockholders.
Failure to obtain such financing could result in the delay or abandonment of
some or all of the Company's development and expansion plans and expenditures,
which could limit the ability of the Company to meet its debt service
requirements and could have a material adverse effect on its business and on the
value of the Common Stock. See "Risk Factors--Substantial Leverage and Ability
to Service Debt; Substantial Future Capital Needs."
 
                                       37
<PAGE>
                                    BUSINESS
 
OVERVIEW
 
    The Company designs, builds, owns and operates innovative wireless networks
capable of providing low-cost real-time status and event monitoring of up to
several million fixed endpoints. The primary application of the Company's
network is to provide NMR services to electric, gas and water utility companies
pursuant to long-term contracts. The Company is currently building wireless
networks to provide NMR services to KCPL and UE in St. Louis covering a total of
approximately 1,230,000 meters, of which more than 105,000 meters were in
revenue service as of June 30, 1996. In addition, the Company has recently
entered into separate services agreements with NSP in Minneapolis, PG&E in San
Francisco and Puget in Washington State, pursuant to which it has contracted to
build wireless networks to provide NMR services covering an aggregate of
approximately 1,115,000 additional meters, including 1,000,000 meters under the
NSP Services Agreement, 100,000 meters under the PG&E Services Agreement and an
initial installation consisting of 15,000 meters under the Puget Services
Agreement. CellNet also currently provides certain network distribution
automation services to electric utility customers including monitoring and
control of power distribution equipment. CellNet's network uses radio devices
fitted to existing utility meters to read and report data from each meter every
few minutes. Through efficient use of radio frequency spectrum, the Company's
networks will have substantial additional capacity to service non-utility
applications that require low-cost monitoring of fixed endpoints, such as home
security and remote status monitoring of vending machines and office equipment.
The Company is working with industry leaders in those markets to encourage
further development of such applications.
 
    CellNet was established in 1984 and prior to 1991 it developed and sold
non-communicating electronic meter registers with embedded memory capabilities.
In 1991, the Company decided to phase out such activities and focus on the
development of NMR services and related networks.
 
    CellNet believes it has a first-to-market opportunity to offer wireless data
communications services on a commercial scale for utility and selected
non-utility applications. CellNet's network is distinguished by the following
advantages:
 
    - infrastructure and operating costs sufficiently low to permit cost
      effective utility meter reading and other fixed point monitoring
      applications;
 
    - highly efficient use of spectrum--the equivalent of approximately a single
      voice channel is needed to operate a network;
 
    - proprietary software specifically designed to manage real-time data
      collection from up to several million endpoints; and
 
    - open systems architecture designed to allow new applications to be added
      to the CellNet system.
 
    Utilities are under increasing regulatory and competitive pressures. CellNet
offers an outsourced solution which enables utilities to offer time-of-use
pricing plans, peak demand monitoring, real-time response to billing inquiries,
real-time power outage detection, on-demand meter reads, customized billing
functions and distribution automation. The Company believes its NMR services
provide utilities with an effective solution to many of the demands created by
the increased regulatory and competitive pressures within the utility industry.
CellNet's system allows utilities to respond effectively to regulatory changes,
reduce costs, defer capital spending and enhance their operating efficiencies.
 
    The Company is actively targeting those utilities which operate in the 60
largest MSAs, which represent a majority of the 225 million electric, gas and
water meters in the United States. The Company believes that utilities operating
in these densely populated areas will be the first to experience heightened
competitive and regulatory pressures, and as such, will be most likely to
benefit from the Company's services. The Company believes that these competitive
and regulatory pressures have prompted utilities in the United States to
undertake increased measures to improve their efficiency and service levels.
 
                                       38
<PAGE>
    CellNet's proprietary technology enables the Company to make extremely
efficient use of spectrum. As a result, relative to other wireless services, the
Company has been able to acquire frequency at a very low cost. The Company had
capitalized $762,000 for license fees and related acquisition expenses
attributable to spectrum acquisition costs as of June 30, 1996 and has acquired
50 spectrum licenses in 42 of the top 60 MSAs. The Company believes that it will
be able to obtain additional spectrum at reasonable cost if required. The
Company has focused its spectrum acquisition strategy on these top 60 markets.
See "Risk Factors--Access to Radio Frequency Spectrum; Regulation by the Federal
Communications Commission."
 
    The Company believes its spectrum-efficient networks will have substantial
excess capacity to service non-utility applications requiring low-cost
monitoring of fixed endpoints. Potential non-utility applications of the
Company's systems include home security, remote status monitoring of vending
machines, office equipment, parking meters and other equipment, and remote
control of traffic lights. The Company is working with industry leaders such as
Ameritech, Hewlett Packard, Honeywell, Inc., Real Time Data, Inc., and
Interactive Technologies, Inc. to develop such applications. The Company
believes that its utility networks will provide an excellent platform to
position the Company as a leading wholesale provider of wireless data
communications services for such non-utility applications.
 
    The Company believes that a significant international market also exists for
its services with several hundred million electric, gas and water meters outside
of the United States. The Company's strategy is to pursue international markets
through a proposed joint venture with BEn. The Company is currently exploring
projects with electric utilities in the U.K., Singapore and Thailand.
 
CHANGES IN THE ELECTRIC UTILITY INDUSTRY
 
    The utility industry is in transition. The traditional utility structure,
consisting of a vertically integrated
system operating as a natural monopoly with rates set in relation to cost, has
presented utilities with little incentive to improve service quality or
operating efficiency. Similar to the regulatory evolution that has already taken
place in the transportation and telecommunications industries, customer demands
and regulatory mandates by Federal, state and local governments are forcing
utilities to transform themselves from regulated monopolies into competitive
enterprises. While regulatory initiatives vary from state to state, many involve
a shift from rate-of-return ratemaking, in which a utility's rates are
determined by its return on assets, to performance-based ratemaking, in which a
utility's rates and profitability are based upon its cost, efficiency and
service quality. The gas utility industry has already been transformed. Today,
commercial and industrial customers can negotiate to purchase gas directly from
producers or brokers, while utilities are required to provide transportation of
such gas to customers' facilities.
 
    The restructuring of the electric utility industry is underway. This
restructuring is focused on opening the electric power production industry, in
certain markets, to full competition in the next few years, and ultimately
providing customers access to multiple suppliers. Federal legislation, such as
the National Energy Policy Act of 1992 (the "EP Act"), has eased restrictions on
independent power producers in an effort to increase competition in the
wholesale electric power generation market. As a result, the construction of
cogeneration facilities and independent power production facilities has been
increasing, creating lower cost alternatives for large commercial and industrial
customers. Further, the EP Act authorized the Federal Energy Regulatory
Commission ("FERC") to mandate utilities to transport and deliver, or "wheel"
energy for the supply of bulk power to wholesale, but not retail, customers. In
order to facilitate the transition to increased competition in the wholesale
power markets made possible by the EP Act, in March 1995 FERC issued a Notice of
Proposed Rulemaking that would require utilities to (i) establish open access to
all wholesale sellers and buyers, (ii) offer power transmission service
comparable to what they provide themselves and (iii) take power transmission
service under the same tariffs offered to other buyers and sellers.
 
                                       39
<PAGE>
    The EP Act granted individual states the sole authority to mandate the
wheeling of electric power to retail customers. Regulatory and legislative
activity at the state level regarding retail wheeling has recently increased
dramatically. California is the furthest along in implementing retail wheeling,
and pursuant to the California Public Utility Commission's plan (which is still
subject to legislative approval), utilities will be required to offer an initial
group of customers the ability to choose their electricity supplier in 1998,
with all customers having this ability by 2003. Regulators in New York,
Massachusetts, Michigan, New Hampshire and Vermont have all ordered utilities to
file restructuring plans which would address, among other competitive issues, a
schedule for implementing retail wheeling over the next several years. Other
states are in various stages of considering the implementation of retail
wheeling, both at legislative and regulatory levels.
 
    The trend from rate-of-return towards performance-based ratemaking, the
movement towards retail wheeling and heightened competition are leading many
utilities to implement initiatives in the following areas:
 
    INCREASE OPERATING EFFICIENCIES.  Utilities are seeking to reduce operating
costs through increased automation and improved information processing. In
particular, many utilities have focused on the inefficiencies of the traditional
once-a-month drive-by or walk-by meter reading process. In addition to the
direct expense of monthly meter reading, manual processes create significant
indirect expenses. These include responding to customer billing service
inquiries and complaints, meter reading errors, missed meter reads, special
appointment meter reads to determine and correct errors, and service calls to
discontinue and to initiate service. Utilities are also seeking to improve
detection of energy theft, which is estimated to cost many millions of dollars
per year.
 
    DEFER CAPITAL EXPENDITURES.  Utilities must build plant capacity to meet the
anticipated peak demand for energy on a daily and seasonal basis with an excess
capacity margin to respond to extraordinary demand peaks caused by extreme
weather conditions. However, power plant expansions are costly and, under
performance-based ratemaking, investments in such capacity might not be fully
compensated by ratemaking authorities. Reducing peak demand allows utilities to
defer or avoid additional plant construction or costly peak power generation
with standby power generating facilities. Unlike phone companies, which offer
time-of-use rates to discourage consumption during peak periods, utilities are
currently unable to implement time-of-use plans for any but their largest
customers due to inadequate real-time information about customer power usage.
 
    IMPROVE SERVICE QUALITY.  In response to the emerging competitive
environment, utilities are seeking to improve and differentiate their services
by offering their customers different billing plans, remote move in/move out
meter reading, multi-location bill aggregation and other innovations. In
addition, utilities are seeking to respond to regulatory and public pressure to
improve their ability to detect and respond to power outages.
 
    To implement time-of-use pricing and other sophisticated pricing plans,
retail wheeling, real-time power outage detection and the other services
described above, electric utilities will require extremely accurate and timely
data regarding energy consumption by customers. However, adequate automated
systems have not been available. Some utilities have simplified and automated
the manual meter reading process to a limited degree through the use of
hand-held and drive-by meter reading equipment, commonly referred to as
automated meter reading ("AMR"). An AMR device polls meters on a meter reading
route, usually on a monthly basis, and the consumption data is then transmitted
to the utility's information system. Periodic meter readings, even when
"automated" by such equipment, do not provide the necessary data to implement
these regulatory and competitive initiatives.
 
                                       40
<PAGE>
THE CELLNET SOLUTION
 
    CellNet has designed, developed and is now commercially deploying in scale
the first wireless data communications network designed to provide high-volume
real-time status and event monitoring of up to several million endpoints. Since
the primary application of the network is to provide NMR services to utilities,
the network has been designed to meet the utility industry's cost requirements,
information needs and rigorous design specifications. CellNet's network uses
radio transmitters fitted to existing meters to read and report data from each
meter every few minutes. CellNet uses inexpensive radio devices and proprietary
software in its networks, deploys certain network components primarily on
utility power poles, and requires minimal frequency spectrum to operate its
system. As a result, the Company believes that for large scale installations it
will be able to provide basic NMR services at a cost to the utility of less than
$1 per month per meter.
 
    CellNet's system enables utilities to better serve their customers by
offering enhanced services such as:
 
    - time-of-use and demand energy rates;
 
    - real-time response to billing inquiries;
 
    - real-time power outage detection, location and notification;
 
    - remote verification of "power on" and outage restoration;
 
    - on-demand meter reads;
 
    - customer-selected billing dates and consolidated, multi-location billing;
 
    - automatic move in/move out meter reading;
 
    - distribution automation; and
 
    - access for utility customers to consumption, rate and billing information
      via the Internet.
 
    In addition, CellNet's system allows utilities to respond effectively to
regulatory changes, reduce costs, defer capital spending and enhance their
operating efficiencies, thereby deriving benefits in the following areas:
 
    RESPOND EFFECTIVELY TO REGULATORY INITIATIVES.  If retail wheeling is
adopted, consumers will contract to buy electricity from specific power
providers, but all such power providers will supply electricity to the local
electrical network, which will then distribute power to all consumers. Monthly
meter reading allows power providers to determine aggregate usage, but not to
determine time of use, a critical requirement to implement retail wheeling. By
providing real-time data on each consumer's power usage, CellNet enables
utilities to effectively implement retail wheeling and avoid the installation
across their territories of individual time-of-use meters, which could cost more
than $150-$200 at each service endpoint.
 
    REDUCE CAPITAL INVESTMENTS.  CellNet's NMR services will enable utilities to
adopt time-of-use billing plans, which can be used to motivate consumers to
shift discretionary consumption to off-peak periods. Reducing peak demand may
enable utilities to defer or avoid costly plant construction. In addition, by
contracting with CellNet to build and maintain the wireless network, the
utilities avoid both the technological risk and capital outlay of developing and
deploying NMR systems.
 
    REDUCE OPERATING COSTS AND ENHANCE OPERATING EFFICIENCIES.  Through
automation, CellNet's wireless data network helps utilities to reduce the direct
and indirect operating costs associated with manual meter reading. In addition,
CellNet's network enables distribution automation capabilities which include
monitoring and control of power distribution equipment as well as meters. Using
the CellNet network, utilities can manage many aspects of the delivery of
electricity, including the ability to detect power outages, monitor and control
circuit breakers,monitor the load on transformers, control circuits to isolate
faults on
 
                                       41
<PAGE>
feeder power lines, and switch automatically among capacitor banks to produce
constant voltage levels. As a result, problems may be detected earlier and
solved more quickly, operations may become more reliable and service fleets may
be more efficiently deployed and dispatched as outages can be more readily
pinpointed within the utility's service territory. Such capabilities also enable
a utility to reduce energy theft through quick detection of meter tampering.
 
    RESPOND TO COMPETITIVE PRESSURES.  CellNet's networks enable utilities to
profile their customers' power usage and to enhance and differentiate service
offerings through innovative billing plans and other programs. In addition,
utilities may elect to provide non-utility services connected with the CellNet
network, as such services are developed. These services could enable utilities
to obtain new revenue sources and, through bundling of such applications,
further differentiate their services.
 
BUSINESS STRATEGY
 
    The Company intends to deploy and operate a series of wireless data
communications networks pursuant to long-term contracts with utility company
customers and to earn recurring revenues by providing NMR services to the
utilities and by using the network to support a variety of non-utility
applications. Principal elements of CellNet's strategy are to (i) focus on
utility markets, (ii) promote development of non-utility applications, (iii)
form strategic alliances, (iv) pursue international expansion and (v) outsource
a substantial portion of its manufacturing and installation activities.
 
    FOCUS ON UTILITY MARKETS
 
    The Company is initially targeting those utilities which operate in the 60
largest MSAs, which represent a majority of the 225 million electric, gas and
water meters in the United States. The Company believes that utilities operating
in these densely populated areas will be the first to experience heightened
competitive and regulatory pressures, and as such, will have the greatest need
to adopt NMR. These MSAs also offer the greatest potential markets for
non-utility applications. The Company is also pursuing selected utilities
outside of the top 60 MSAs.
 
    PROMOTE DEVELOPMENT OF NON-UTILITY APPLICATIONS
 
    Through the efficient use of spectrum, each CellNet network will have excess
capacity after serving all of a utility's NMR and distribution automation
requirements. The Company will seek to use its networks' excess capacity to
support non-utility services that would benefit from the availability of a
low-cost wireless network and that would be offered by CellNet's corporate
clients, including a utility or its affiliates. The Company is working with
leading manufacturers and application developers in order to promote the
development of products and services capable of using the CellNet networks.
Potential applications include the following:
 
    - security services for home security, fire alarm and personal safety
      devices;
 
    - remote status monitoring for vending, postage, change and commercial
      washing machines, office and factory equipment, and intelligent home
      devices, such as remote control thermostats; and
 
    - intelligent transportation systems for traffic lights, parking meters and
      toll booths.
 
    The Company believes that its low monthly network service prices will
substantially increase the likelihood of market acceptance of existing
applications and enable potential new applications. Wireless home security
systems are an example of an existing application that might achieve greater
market penetration if equipment and service costs were reduced by using a
CellNet network. CellNet is working with Interactive Technologies, Inc., a
leading provider of wireless home security systems, to develop an affordable
security system that would communicate over a CellNet network. Additionally,
remote monitoring of vending machines would substantially reduce the cost of
servicing those machines. Real Time Data, Inc. ("RTD") has developed a vending
machine monitoring device which tracks product sales and inventory. RTD and the
Company have been working together to integrate RTD's devices with the Company's
networks and expect to begin commercial trials within twelve months.
 
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<PAGE>
    FORM STRATEGIC ALLIANCES
 
    The Company is forming strategic alliances with leading companies and
certain utilities to promote the development and joint marketing of
complementary products or services for utility applications and the development
of non-utility applications whose traffic would be carried on CellNet networks.
CellNet is currently working with the following leading companies.
 
    AMERITECH AND WISCONSIN ELECTRIC POWER COMPANY.  The Company is working with
Ameritech and its partner, Wisconsin Electric Power Company, on the development
and joint marketing of a high-end, two-way, in-home terminal for remote control
of home security, lighting, environmental and other home systems.
 
    GENERAL ELECTRIC COMPANY ("GE").  GE and the Company have entered into a
non-binding memorandum of understanding ("MOU") to jointly market to utilities,
on a non-exclusive basis, automated NMR solutions that incorporate both parties'
products. GE has installed CellNet radio devices on new GE meters on a trial
basis.
 
    HEWLETT-PACKARD ("HP").  The Company and HP are working on a number of
projects for cooperative marketing of utility applications such as systems
integration, data storage, transformer load analysis, energy theft analysis,
power quality measurement, and equipment and status monitoring. This non-
exclusive relationship, pursuant to a non-binding MOU, provides for joint
marketing, technology exchange and joint proposals to utilities.
 
    HONEYWELL, INC.  Honeywell has entered into a non-binding MOU with the
Company relating to the creation of "smart communicating thermostats" that would
serve as the key elements in a home-based energy management system. The parties
also plan to collaborate on identifying other in-home automation products that
could leverage Honeywell's extensive line of environmental control products with
CellNet's wireless technology.
 
    INTERACTIVE TECHNOLOGIES, INC. ("ITI").  The Company has entered into an
agreement with ITI, a leading provider of wireless, in-home security systems, to
develop moderately-priced security systems based on ITI's existing security
devices and CellNet's wireless technology.
 
    RTD.  As described above, RTD, a developer of remote vending machine
monitoring systems, has entered into an agreement with the Company to integrate
its vending machine monitoring system with the Company's wireless network
technology.
 
    CONNEXT, INC. ("CONNEXT").  The Company has entered into a joint marketing
agreement with ConnexT, a subsidiary of Puget which provides network-based
application services to utility companies, whereby the parties agree to assist
each other in marketing their respective products and services to both
companies' existing and prospective utility customers.
 
    PURSUE INTERNATIONAL EXPANSION
 
    With several hundred million utility meters located outside of the United
States and with comparable opportunities to use the CellNet system for utility
and non-utility applications, the international market offers significant
additional opportunities for the Company. Although it has concentrated almost
all of its efforts to date on the domestic market, the Company has begun
exploring international market opportunities. The Company has undertaken limited
market investigations in a number of countries including the U.K., Singapore and
Thailand, and continues to receive numerous inquiries from utilities and others
expressing interest in the deployment of the CellNet system outside of the
United States. The Company's strategy is to pursue these markets through a
proposed joint venture with BEn.
 
    In September 1996, the Company entered into a letter of intent ("Letter of
Intent") with BEn to form an international joint venture (the "Joint Venture")
that would have the exclusive right to deploy and operate the Company's wireless
data communications system in countries outside of the United States. The Joint
Venture would be 50% owned by each party and would be operated independently.
The
 
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<PAGE>
Company would license its technology to the Joint Venture and the Joint Venture
would sublicense that technology to individual local operating project entities
in which the Joint Venture would invest and generally maintain operating
control. The managing board of the Joint Venture would be composed of an equal
number of representatives from each party and would review and approve all major
business decisions. Formation of the Joint Venture is subject to the negotiation
and execution of definitive agreements between the parties upon mutually
acceptable terms. While both parties have agreed to work diligently, on an
exclusive basis, to conclude such arrangements within a three-month period
following execution of the Letter of Intent, no assurance can be given that the
parties will be able to do so within that period, or at all.
 
    In considering international expansion opportunities for the CellNet system,
the Joint Venture intends to target markets characterized by (i) a
well-developed utility infrastructure, (ii) demand for low-cost monitoring,
(iii) a progressive regulatory climate favoring increased efficiency, customer
service and competitive access and (iv) well-capitalized, established and
reliable local partners.
 
    The Company's principal international activity to date has been in the
United Kingdom, where deregulation and privatization initiatives have resulted
in open market competition in a pattern which may be duplicated elsewhere. The
Company believes that the CellNet system can be adapted for use in the United
Kingdom with appropriate modifications to the system's radio devices and other
system equipment. The Company is seeking to obtain spectrum licenses with the
assistance of local regional electric companies ("RECs") and others, and has
initiated discussions with a number of RECs for the deployment of pilot and
full-scale NMR systems.
 
    Singapore and Thailand are estimated to have approximately 3.0 million and
8.0 million existing utility meters (of which 2.0 million are in metropolitan
Bangkok), respectively. The Company has had preliminary discussions with
utilities and potential local partners to enter into NMR services agreements in
these markets.
 
    OUTSOURCE SUBSTANTIAL MANUFACTURING AND INSTALLATION ACTIVITIES
 
    The Company outsources a substantial portion of its manufacturing and
installation activities. As a result, CellNet leverages the size and
capabilities of key suppliers to take advantage of manufacturing economies of
scale, reduce component pricing through bulk purchasing, and have access to
manufacturing capacity and resources to meet highly variable production
requirements. The Company will retain overall network construction
responsibility, but intends to rely on local subcontractors for installation,
primarily those who have long working relationships with CellNet's utility
customers. The Company believes that outsourcing installation activities will
reduce the start-up time and the Company's investment risk for each project.
 
WIRELESS COMMUNICATIONS INDUSTRY OVERVIEW
 
    CellNet operates within the wireless communications industry, which includes
personal communications services ("PCS"), specialized mobile radio ("SMR"),
microwave, cellular (including cellular digital packet data ("CDPD") ), paging
and multiple address radio system ("MAS") segments, among others. The two
principal categories of commercial wireless applications are voice and data
transmission. Within those broad categories, service requirements for specific
applications vary substantially in terms of quality, speed, capacity, mobility,
two-way capability, geographical coverage and cost. In general, products which
provide for greater mobility and capacity are more expensive. As a consequence,
the market for wireless services is segmented, matching specific service
requirements with the most suitable wireless technology.
 
    CellNet's system is designed to utilize small amounts of spectrum and to
provide low-cost, high-volume, real-time monitoring of fixed endpoints. The
Company believes other telecommunications applications or market segments are
not as well suited for use in NMR and similar applications except in limited
cases such as high-use industrial metering, where the increased equipment and
service costs might be justified by high rates of power consumption, or in
certain rural applications, where the cost of installing
 
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<PAGE>
and operating a fixed network on a per meter basis might be higher. Competing
service applications are therefore expected to develop largely within the
segment of the wireless communications market in which CellNet now operates.
 
    CellNet's network architecture and the nature of the markets that it serves
differ significantly from traditional cellular companies, thereby resulting in
potential advantages for CellNet in providing NMR services which include:
 
    LOWER MARKET ADOPTION RISK.  CellNet will only construct a network after
entering into a long-term relationship with a utility or other client. It
therefore does not need to finance construction of networks in anticipation of
obtaining customers.
 
    LOWER CHURN/PENETRATION RATE.  Unlike the customer bases for other wireless,
voice and data service providers where customers can easily switch to a
competitive provider, CellNet's subscriber endpoints do not experience frequent
change or "churn" and the Company gains 100% penetration within each contracted
market. The marketing and administrative costs typically associated with churn,
and the capital risk associated with variable penetration rates, are thus
eliminated. Further, due to inflation escalation clauses in the Company's
services agreements, the Company believes that the value of its revenue per
endpoint in real terms will likely be maintained over time.
 
    HIGHER CUSTOMER CREDIT QUALITY.  CellNet receives its contract service
revenue directly from utilities rather than from individual subscribers. As a
result, the Company experiences less credit risk and generally lower billing
expenses than other wireless communication providers.
 
    MORE EFFICIENT DEPLOYMENT.  Cellular and PCS cell sites are frequently
costly and can be difficult to obtain. The modularity of the CellNet system and
the efficient size of its components facilitate inexpensive deployment of
scalable networks. The Company's system components have been designed to fit on
utility power poles or, where necessary, on buildings or other structures. As
the electric utility is its primary customer, CellNet has access to utility
poles, transmission towers, and various properties for deployment. Radio
devices, which represent the bulk of network components, are simply "plugged in"
as newly retrofitted meters to replace an existing meter. The Company's MCCs and
CellMasters (as defined below) typically take two to five hours to install,
providing a network which can be deployed swiftly and efficiently. The system is
also scalable, thereby allowing coverage regardless of the size of the utility
service area.
 
    MORE EFFICIENT SYSTEM DESIGN.  Cellular telephone networks are designed for
peak usage, with a large percentage of the network underutilized for much of the
day. The CellNet network gathers information from its endpoints consistently
around the clock and therefore does not encounter the peak usage problems
typically experienced by cellular phone service providers.
 
    LOWER FREQUENCY COSTS.  Cellular, PCS and other two-way wireless systems
typically require a large amount of spectrum which can be very costly to obtain.
Because the Company is able to utilize a small amount of frequency for a wide
metropolitan area (the equivalent of approximately a single cellular voice
channel), it is not subject to the substantial frequency costs associated with
wireless communications companies.
 
TECHNOLOGY
 
    CellNet's NMR system has been developed specifically to offer real-time,
low-cost, high volume wireless data communications services. Such services
require (i) inexpensive endpoint devices, (ii) the ability to support a wide
range of applications, (iii) reliable, consistent service over a wide area, (iv)
the capacity to handle simultaneous transmission and processing of a large
volume of data, (v) integrated communications and applications support software,
and (vi) efficient use of bandwidth to minimize spectrum acquisition costs.
 
    To meet these cost and data handling requirements, CellNet has designed a
system which uses a two-tiered wireless network hierarchy managed by a central
system control center which collects, concentrates,
 
                                       45
<PAGE>
forwards and manages data from many fixed endpoints. The elements of this
communications hierarchy include:
 
    - endpoint devices which transmit data relating to the equipment they are
      monitoring or controlling such as utility meters;
 
    - MicroCell Controllers ("MCCs") which manage the endpoint devices in their
      local coverage area (as part of a local area network or "LAN") and which
      collect and process data transmissions from such endpoint devices;
 
    - CellMasters which gather data from MCCs located in a wide coverage area
      (as part of a wide area network or "WAN") and which communicate that data
      to a central System Controller; and
 
    - a System Controller which manages the entire network and operates the
      application gateways for integration with the client's own data systems.
 
    ENDPOINT DEVICES.  The subscriber unit of the CellNet system is a relatively
inexpensive low-power radio device which is attached to a stationary data
source, such as a utility meter, to collect and transmit information to an MCC
and typically includes a transceiver or transmitter. The Company has developed
endpoint devices for electric utility applications which may be retrofitted to
each of the four major types of utility meters presently being used by electric
utilities in the United States. These endpoint devices currently collect time of
use, customer demand and load profile data from an electric meter and transmit
such information to the local area MCC once every few minutes. Electric meter
endpoints are also able to transmit "distress signals" indicating meter
tampering or power outages. The Company is also developing endpoint devices for
gas and water meters, which it expects to introduce by the end of 1996 and 1997,
respectively, and two-way radio devices for advanced NMR applications. The
Company is also working with industry leaders to develop endpoint devices for
non-utility applications. See "--Business Strategy-- Form Strategic Alliances."
 
    MICROCELL CONTROLLERS.  An MCC is a device which is mounted on a utility
pole or other fixed location in the center of a microcell and which routes data
from all of the endpoints in the microcell to the CellMaster via the WAN. The
number of endpoint devices in each microcell depends on a number of factors,
including topography and population density. In addition to functioning as a
router, the MCC is an intelligent node in the distributed control system and has
a powerful microprocessor which enables it to perform data storage, packet
routing and voltage and power outage monitoring for endpoint devices in its
microcell area. Each MCC also has extensive network management capabilities
which permit new endpoint devices to be added automatically without interfering
with the handling of data from existing endpoints. This architecture allows
CellNet to significantly reduce the cost of the endpoint device itself and
increases the potential data throughput of an entire network, as most of the
intelligence is provided at the MCC level. The MCC communicates with the
endpoint devices in its microcell in the 902-928 mHz band, which is an
unlicensed portion of spectrum.
 
    CELLMASTERS.  A CellMaster generally communicates with anywhere from 50 to
200 MCCs over an area typically covering 20-75 square miles (2.5-5-mile radius).
Each CellMaster incorporates network management software which manages traffic
scheduling, radio frequency power controls and signal monitoring. CellMasters
are built with fully redundant hardware, are ruggedly constructed for extreme
weather, and can perform automatic switchovers between system components in case
of failure. The WANs covering specific utility customer service areas are
composed of a number of CellMaster units. A CellMaster communicates with the
MCCs using a radio link in the 928/952 mHz band, which is a licensed portion of
spectrum.
 
    RTUS.  Remote Terminal Units ("RTUs") monitor and operate equipment at
specific points in a utility's distribution system. CellNet integrates a two-way
radio device into RTU equipment manufactured for a utility by other parties,
which enables remote operation of these RTUs. By providing a means of remote
monitoring and controlling of power distribution equipment, CellNet's system
enables utilities to
 
                                       46
<PAGE>
monitor and control circuit breakers, monitor the load on transformers, control
circuits to isolate faults on feeder power lines, and switch automatically among
capacitor banks to provide constant voltage levels.
 
    SYSTEM CONTROLLERS.  The System Controller provides the link from the
CellMasters to the client's corporate data network and serves as the network
management platform. The System Controller consists of a cluster of UNIX-based
workstations operating over a network using standard TCP/IP protocols. Such a
configuration is extremely scaleable as it can be expanded to meet system
requirements simply by adding additional workstations. The System Controller
supports a variety of radio-based and leased line data links to each CellMaster
in the network. These links are redundant for added reliability. At the local
systems operations center, the System Controller provides customized gateways to
existing client data systems. The System Controller enables CellNet's on-site
system operator, who manages the network for CellNet's utility clients, to
manage traffic, monitor performance and configure network devices. As
non-utility applications are deployed, the Company may integrate additional
server devices to manage such non-utility applications at the System Controller
level.
 
    CellNet's MCC and CellMasters are equipped with back-up batteries and power
supply. CellNet's System Controllers also have available back-up power
capability.
 
    The Company also operates the CellNet Central Operations Room ("CCOR") at
its San Carlos, California facilities which monitors performance of all regional
System Controllers and is able to assume operations of the regional networks if
the local System Controller experiences a failure. The Company operates a
private national data network to link these regional sites using third-party
carrier services.
 
    SYSTEM SOFTWARE.  CellNet believes that one of its key enabling technologies
is the software which facilitates operation of a large-scale NMR system. While
certain "off-the-shelf" networking approaches work well in a wireline
environment with expensive computers and workstations, the ability to operate in
a wireless environment under extreme conditions at low cost has required the
development of a sophisticated network architecture. CellNet's network solution
is based on distributed computing and messaging technologies which enable
intelligence to be decentralized and ensure efficient use of spectrum. The
CellNet Network Operating System ("NOS") is a proprietary system that provides
sophisticated network communication services between the System Controller and
the CellMaster units, RTUs, MCCs and endpoint devices. It is a scaleable system
that has been specifically designed to ultimately handle millions of endpoints
in a single regional network. Extensive real-time diagnostic and network
management features manage traffic, monitor system performance and enable
network configuration as data is collected and delivered to users. The CellNet
NOS is able to maintain fast response times and system capacity by distributing
a significant portion of the network's computing power at the MCC level.
 
    The NOS offers the benefits of incrementally adding processing power as well
as supporting remote operations required for redundancy and backup operations.
As such, an entire regional system can be switched quickly from one System
Controller to another in the event of failure. The CellNet NOS is also able to
segregate network data from multiple non-utility applications and provide such
data to non-utility clients over additional database interfaces. Each CellNet
system is customized with application-specific gateways which enable the
interface between the System Controller and the client's existing corporate data
systems. CellNet has delivered gateways to support the data requirements for
billing automation, electric distribution automation, customer service call
center automation and load management programs. The flexibility provided by this
NOS architecture will enable the system to offer services for many new
applications unrelated to NMR services such as distribution automation and
non-utility applications. By building on a general network capability the
Company can extend its services to many other utility and non-utility services
without incurring significant costs of re-designing the underlying
communications architecture. Each new application is expected to be added with
only incremental development, which will be focused primarily on
application-specific endpoint devices and system gateways. Furthermore, since
its design is independent of the specific endpoint radio devices, the Company
believes that this architecture can evolve to incorporate future advances in
wireline and wireless communications. The Company has
 
                                       47
<PAGE>
made a substantial commitment to establishing a strong competitive position,
having invested over 240 staff-years in the design, development and testing of
its system.
 
    EFFICIENT SPECTRUM UTILIZATION.  CellNet's network components utilize both
licensed and unlicensed radio frequency bands. The CellNet WAN operates in the
928/952 mHz frequencies which are licensed by the FCC in 25 or 12.5 kHz channel
bandwidths for full duplex operation and point-multipoint data services. CellNet
has developed a proprietary technology, subject to issued and pending patents,
which permits a narrowband radio system to derive 10 subchannels from a single
25 kHz channel. By reusing subchannels in a manner similar to that used by
cellular phone systems, CellNet believes it can grow a system to cover a large
region and expand capacity incrementally as needed. As a result, CellNet is able
to operate its wide area networks in the spectral equivalent of approximately a
single voice channel. CellNet has obtained 50 spectrum licenses in 42 of the top
60 MSAs and believes that it will be able to obtain additional spectrum as
required.
 
MANUFACTURING AND OPERATIONS
 
    The Company currently outsources the manufacture and assembly of its high
volume, low cost equipment such as endpoint radio devices. For instance, Jabil
Circuit Inc. ("Jabil"), one of the largest electronic equipment subcontractors
in the United States, is assembling endpoint radio devices for electric meters
for the Company. CellNet's supply strategy is to leverage the size and
production capabilities of Jabil and other key suppliers to take advantage of
manufacturing economies of scale, reduce component pricing through bulk
purchasing and obtain access to manufacturing capacity and resources to meet
highly variable production requirements.
 
    CellNet presently focuses its limited internal manufacturing resources on
final assembly and testing of its lower volume, more complex equipment,
including System Controllers, CellMasters and MCCs. CellNet assembles these
network components, then custom configures and tests such components to meet
stringent utility industry field equipment standards. Samples of all products,
whether internally or externally built, are thermally and electrically
stress-tested to measure product quality and reliability. Test results are used
both to monitor production quality and to provide information to CellNet's
development organization for further design enhancements.
 
    CellNet has developed and is continuing to improve a high-volume, low-cost
process to retrofit electric utility meters with endpoint radio devices without
causing a meaningful disruption of service to a utility's customers. The
Company's proprietary system for retrofit information management analyzes
operating data, generates reports, and provides this information to utilities
for inclusion in their databases. The Company installs its endpoint radios on
both new and previously installed electric meters at its retrofit facilities in
Kansas City, Missouri. The Company expects that similar regional retrofit
centers will be established as needed to meet the network installation
requirements under new services agreements with utilities, although a retrofit
center can support more than one network deployment.
 
    The Company's reliance on third-party manufacturers, including currently
single manufacturers for radio devices and for printed circuit boards, involves
a number of additional risks, including the absence of guaranteed capacity and
reduced control over delivery schedules, quality assurance, production yields
and costs. The Company relies on sole and limited source vendors and
subcontractors for certain subassemblies and components which involves certain
risks, including the possibility of shortages and reduced control over delivery
schedules, manufacturing capability, quality and cost. See "Risk
Factors--Dependence on Third-Party Manufacturers; Exposure to Component
Shortages."
 
SYSTEM DEPLOYMENT AND OPERATION
 
    For each of its network deployments, the Company provides full
implementation services to its clients, including system design, site selection,
frequency licensing, equipment installation, software modification, systems
integration and project management.
 
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<PAGE>
    The modular design of the CellNet system and the efficient size of its
components facilitate inexpensive deployment of scalable networks. Most of the
system components have been designed to fit on utility power poles or, where
necessary, on buildings or other structures. The majority of the network is
simply "plugged in" as the newly retrofitted meters replace existing meters. The
MCCs and CellMasters take typically two to five hours each to install, providing
a network which can be deployed swiftly and efficiently. The system is also
scalable, thereby allowing adequate coverage regardless of the size of the
utility service area.
 
    Field engineering teams are responsible for the installation and deployment
of all of the Company's networks. Once a services contract has been signed,
CellNet places a local project manager in charge of the installation. The
project manager hires local personnel, coordinates activities with various
departments within the utility, and draws on CellNet's corporate staff to
perform specialized services. CellNet's corporate staff is responsible for RF
network design, system software installation and integration, training of local
systems administration personnel, FCC licensing requirements, and remote systems
monitoring. CellNet's local personnel are responsible for RF engineering and
site testing, site selection, routine software administration and maintenance,
selection and training of subcontractors, coordination of meter retrofitting,
materials handling, and office administration. During the two to four-year
installation phase of each project, local personnel for the project employed by
CellNet number from twenty to thirty people, depending on the size and
anticipated speed of each deployment. Meter changeout and system equipment
installations are generally carried out by subcontractors.
 
    Following system deployment, a system management team of typically ten to
twenty CellNet personnel (for deployments the size of KCPL and UE) will remain
on site for the duration of the contract to handle day-to-day operations and
routine utility requests. This group will be supported by CellNet's headquarters
or regional offices, if any, that will provide 24 hour troubleshooting support
as well as additional technical expertise that can be quickly dispatched if
needed.
 
    The Company also intends to provide substantial customer support, including
on-going field support and critical centralized network support functions
through regional network control centers. Currently, the Company is providing
sophisticated network monitoring from its headquarters in San Carlos,
California.
 
CURRENT UTILITY SERVICES AGREEMENTS
 
    KANSAS CITY POWER & LIGHT COMPANY.  In August 1994, CellNet entered into a
Utility Services Agreement with KCPL (the "KCPL Services Agreement") for the
provision of NMR and other data communications services over a network to be
built, installed and operated by CellNet. KCPL is paying CellNet for certain
installation costs based upon the number of meters in revenue service and
monthly service fees based on the number of meters in service being used to bill
customers. The KCPL Services Agreement covers approximately 420,000 meters
within KCPL's service territory. CellNet is obligated to provide certain NMR
services, including basic meter reading, time-of-use, demand, connect/disconnect
(move in/move out), load profile and real-time reading, as well as outage and
tampering notification and certain other distribution automation services.
CellNet retains ownership of its network system and all related equipment. KCPL
retains ownership of its meters, RTUs and all metering and other data collected
from KCPL's equipment. Upon the third anniversary following complete deployment
of the system, KCPL will have the option to purchase from CellNet the radio
transmitters and transceivers attached to KCPL's meters and RTUs at prices
intended to allow CellNet to fully recover its then unamortized endpoint costs
(meter and RTU radio device), based upon agreed prices for such equipment.
 
    The term of the KCPL Services Agreement is 20 years. KCPL has the right to
terminate the KCPL Services Agreement on its eighth, eleventh, fourteenth and
seventeenth anniversary, subject to six-months' prior written notice and to the
making of specified termination payments intended to allow CellNet to recover
its then unamortized endpoint costs (meter and radio RTU device), based upon
agreed prices for such equipment. KCPL can also terminate the KCPL Services
Agreement for cause in the event of a material and continuing failure on
CellNet's part to meet agreed NMR performance standards on a
 
                                       49
<PAGE>
consistent basis over agreed time periods, subject to certain rights to cure any
such failure. CellNet is entitled to install and operate its network equipment
on KCPL's property under joint use arrangements. The cost of obtaining any
necessary third party installation sites will be shared equally by the parties.
CellNet may use the network to provide services to third parties both during and
after the term of the KCPL Services Agreement.
 
    UNION ELECTRIC COMPANY.  In August 1995, CellNet entered into a Utility
Services Agreement with UE (the "UE Services Agreement") for the provision of
data communications services over the Company's network for all electric meters
within defined limits of UE's service area in the city of St. Louis and certain
surrounding counties. UE is paying CellNet for certain installation costs and
monthly service fees based on the number of installed meters and RTUs. The UE
Services Agreement now covers approximately 810,000 electric meters within such
territory. CellNet is obligated to provide certain NMR services, including basic
meter reading, demand, load profile, connect/disconnect, time-of-use and
real-time reading, as well as outage and other notification services. During the
term of the UE Services Agreement, UE has the option to acquire certain gas NMR
services from CellNet and receive an expanded scope of electric NMR services.
CellNet retains ownership of its network system and all related equipment. UE
retains ownership of its meters, RTUs and all metering and other data collected
from UE's equipment.
 
    CellNet is entitled to install its network equipment on UE's property
without cost provided the use of such sites is exclusively for the provision of
services to UE. The cost of obtaining any necessary third party sites will be
shared equally by the parties. CellNet may use the network to provide services
to third parties for a period of 30 years subject to the payment to UE of
reasonable rental rates. The term of the UE Services Agreement is 20 years with
an option on UE's part to extend it for two additional periods of five years
each on substantially similar terms. UE has the right to terminate the UE
Services Agreement on its seventh, twelfth and seventeenth anniversary subject
to six-months' prior written notice and to the making of specified termination
payments intended to allow CellNet to recover its then unamortized endpoint
costs (meter and radio RTU devices) based upon agreed prices for such equipment.
UE can also terminate the UE Services Agreement for cause in the event of a
material and continuing failure on CellNet's part to meet agreed NMR performance
standards on a consistent basis over agreed time periods, subject to certain
rights to cure any such failure.
 
    NORTHERN STATES POWER COMPANY.  In August 1996, CellNet entered into a
Utility Services Agreement (the "NSP Services Agreement") with NSP for the
provision of data communications services over a network to be built, installed
and operated by CellNet. NSP will pay CellNet a monthly service fee based on the
number of meters in service then being used to bill customers. The NSP Services
Agreement covers approximately 1.0 million gas and electric meters within NSP's
service territory located in the Minneapolis-St. Paul metropolitan area. CellNet
is obligated to provide certain automated meter reading services, including
basic meter reading, time-of-use, demand, connect/disconnect (move in/move out),
load profile and real-time reading, as well as outage and tampering notification
and certain other distribution automation services. CellNet retains ownership of
its network system and all related equipment. NSP retains ownership of its RTUs,
meters and all metering and other data collected from NSP's equipment.
 
    The term of the NSP Services Agreement is 15 years, with a five year option
to extend, exercisable by NSP. The NSP Services Agreement provides NSP with
certain rights to terminate the NSP Services Agreement prior to commercial
operation of the network and system (I.E., full deployment) if certain specific
conditions are not met, such as approval of the NSP Services Agreement by
governmental authorities to the extent such approval is required. In addition,
either party has the right to terminate the NSP Services Agreement upon the
occurrence of continuing events of default or if a governmental authority causes
the NSP Services Agreement to be rescinded. In addition, upon the failure of
either party to meet certain obligations, such as delays in installation or
integration schedules thereunder, such party must pay penalty fees to the other
party.
 
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    CellNet is entitled to install and operate its network equipment on NSP's
property, so long as it pays to NSP market-based rates for such rights. CellNet
bears the cost of obtaining any necessary third party installation sites.
 
    PACIFIC GAS & ELECTRIC COMPANY.  In October 1996, the Company entered into a
Master Agreement for Automated Meter Reading with PG&E and a Contract Work
Authorization issued thereunder (collectively, the "PG&E Services Agreement")
for the provision of electric and gas meter reading services covering
approximately 100,000 meters in PG&E's Delta District in the San Francisco Bay
Area. Under the PG&E Services Agreement, the Company will provide basic electric
and gas consumption meter reading services as well as demand, time-of-use and
load profile electric meter reading services for a period of 10 years, with an
option on PG&E's part to extend it for two additional periods of five years
each. In return, CellNet will receive monthly service fees based upon the
services provided. CellNet retains ownership of its network system and all of
its related equipment. PG&E retains ownership of its meters and all metering
data collected. PG&E is responsible for retrofitting all electric and gas
meters, with the option to require CellNet to retrofit electric meters for an
agreed fee.
 
    CellNet is entitled to install its network equipment on PG&E's property,
subject to the payment of certain agreed fees. The network is intended for
PG&E's exclusive use and may not be used for the provision of services to third
parties without PG&E's consent. PG&E has the right to terminate the PG&E
Services Agreement at any time subject to the making of specified termination
payments intended to allow CellNet to recover its then unamortized network
equipment costs based upon agreed prices for such equipment. PG&E also has the
right to terminate the PG&E Services Agreement for cause, including a failure of
the Company to meet specified network installation schedules and agreed system
acceptance, economic and performance criteria, and under certain other limited
circumstances, without making any termination payments.
 
    PUGET SOUND POWER & LIGHT COMPANY.  In August 1996, CellNet entered into a
letter of intent (the "Puget Letter of Intent") and an Initial Services
Agreement (the "Puget Initial Services Agreement") with ConnexT, a subsidiary of
Puget for the provision of NMR and other data communications services over a
network to be operated by CellNet. The Puget Letter of Intent provides that the
parties will enter into good faith negotiations with respect to a Services
Agreement which would succeed the Puget Initial Services Agreement.
 
    The Puget Initial Services Agreement covers approximately 15,000 meters
within Puget Power's service territory. There are approximately 838,000 meters
within Puget's service territory. The Company seeks a long term services
agreement covering approximately 556,000 meters. The term of the Puget Initial
Services Agreement continues until 60 days after an evaluation period following
installation and testing of the network. CellNet is obligated to provide certain
NMR services and to retrofit certain quantities of electric and gas meters
supplied by ConnexT. ConnexT has agreed to arrange for Puget to undertake
installation of retrofitted meters, MCCs, CellMasters and other network related
components in the agreed service territory. CellNet will establish communication
links and perform certain other work necessary to complete installation. ConnexT
is paying CellNet monthly services fees based on the number of meters in service
then being used to bill customers. CellNet retains ownership of its network
system, all related equipment and radio meter modules. ConnexT retains ownership
of its meters and certain other equipment. If CellNet has met certain
performance standards under the Initial Services Agreement and, within one year,
a Services Agreement has not been entered into with Puget covering at least
175,000 meters, ConnexT may elect to continue receiving NMR services from
CellNet for a period of not less than five years, or may discontinue the
arrangement upon making a specified termination payment intended to allow
CellNet to recover certain of its invested costs.
 
SALES AND MARKETING
 
    The Company has organized its sales and marketing efforts based on utility
and non-utility network applications. For its utility segment, the Company's
initial target market includes utilities in the 60 largest
 
                                       51
<PAGE>
MSAs in the U.S. which represent a large majority of the meters in the United
States. The Company is also pursuing selected utilities outside the top 60 MSAs.
Given the strategic nature of the Company's utility products, sales cycles
typically extend up to 18 months and involve the solicitation, consultation and
approval of decision makers across key divisions within each potential utility
customer. The Company has a sales and marketing organization of 24 persons,
including six dedicated sales representatives with a mix of utility and
information technology sales backgrounds, several of whom have extensive
experience in the electric utility industry. Regional sales professionals are
supported by corporate specialists in the areas of metering, systems
integration, and deployment.
 
    The Company has established a team of market managers for the development of
new business opportunities. This team develops business concepts that are
enabled by CellNet's services, pursues market research to validate these
concepts and identifies potential alliances that will be required to create the
products and services. This team is composed of individuals with backgrounds in
cellular and wireless marketing, product management and consumer products. The
Company intends to seek joint venture partners to pursue international markets.
 
    CellNet's sales approach addresses a utility's need to prepare for the
future competitive environment by reducing costs, meeting present and future
regulatory requirements and enhancing customer service. CellNet intends to show
sustained commitment to the utility by entering into long-term performance-based
contracts, typically exceeding ten years. While the sales cycle for utilities is
lengthy, it results in the signing of long-term service contracts covering
thousands and potentially several million endpoints, providing both significant
recurring revenue and the opportunity to offer additional non-utility services.
 
    The Company intends to concentrate its marketing efforts for non-utility
applications on industry-leading providers of products and services that would
benefit from the Company's low-cost wireless network. The Company is working
with leading manufacturers and applications developers to promote and develop
products and services that utilize the Company's networks. See "--Business
Strategy--Promote Development of Non-Utility Applications." The Company expects
that the manufacturers and developers of such products and services would market
such products and services to end users.
 
PROPRIETARY RIGHTS
 
    CellNet relies on a combination of trade secret protection, copyrights,
patents, trademarks and confidentiality and licensing agreements to establish
and protect its proprietary rights.
 
    CellNet's WAN radio system has been developed using advanced digital signal
processing techniques and an RF system architecture that enables CellNet to
create a complete digital cellular system in approximately a single 25 kHz voice
channel. This technology is based on narrowband modulation and compression of
many subchannels into a single channel. Extremely stable frequency control is
required to preserve system performance. CellNet's system of frequency control
is the subject of several issued and pending patents claims. In addition, the
efficiency of the frequency protocol utilized by the CellMaster is determined in
part by its ability to recover short burst transmissions from an RTU or MCC. The
CellMaster's burst data recovery process is also the subject of several issued
and pending patents claims.
 
    The spread spectrum radio technology utilized in the CellNet LAN has been
licensed to CellNet by Axonn Corporation and an affiliate of Axonn (together,
"Axonn"). The Axonn spread spectrum technology is a patented, low-cost radio
system which offers the price / performance relationships that the Company
believes are required for a commercially-feasible telemetry network. Under its
licenses from Axonn, CellNet has acquired an exclusive right to use Axonn spread
spectrum technology in the utility distribution and service market and an
exclusive right to provide services for other applications outside the utility
market through the CellNet system architecture. CellNet's right to provide fire
and security applications based upon Axonn's technology is not exclusive under
these licenses. The Axonn licenses do not expire by their terms until the last
to expire of any of the patent rights underlying such licenses which will occur
not earlier than March 21, 2014. Up to that time, as each patent licensed under
the Axonn licenses expires, the technology underlying such patent will become
freely available in the public domain.
 
                                       52
<PAGE>
    CellNet has developed a proprietary, patent-pending approach to transmitting
metering information which allows the LAN to accumulate time of use, demand and
load profile data. CellNet's protocols and data transmission methods are
incorporated in its proprietary firmware. During the development and test
deployments of the CellNet WAN and LAN radio systems, the Company has
accumulated substantial information regarding cellular and microcellular radio
systems. This information is being used to develop modeling and planning tools
which assist CellNet in the deployment and operation of complex RF systems. The
Company has written over 4.5 million lines of software code to implement its
system, a process which required over 150 staff-years of design, coding and
testing and remains a proprietary asset.
 
    The Company's success will depend in part on its ability to maintain
copyright and patent protection for its products, to preserve its trade secrets
and to operate without infringing the proprietary rights of third parties. See
"Risk Factors--Uncertainty of Protection of Copyrights, Patents and Proprietary
Rights."
 
RESEARCH AND DEVELOPMENT
 
    The Company has steadily increased its research and development efforts over
the past several years and expects to continue to spend a significant portion of
its resources on these activities for the foreseeable future. The Company spent
$5.3 million, $9.7 million, $22.4 million and $13.0 million for research and
development in 1993, 1994, 1995 and the six months ended June 1996,
respectively. The Company presently employs more than 85 software and hardware
engineers and other professional staff in these efforts and contracts with a
number of highly-specialized outside consultants for additional services as
required. The focus of the Company's research and development efforts in the
past has been on the development of the radio hardware, spread spectrum radio
protocols, System Controllers, intelligent base stations (CellMasters and MCCs),
extensive software code, database capacity and other elements required for a
flexible, high-capacity wireless data communications network capable of
processing data from several million endpoints on a real-time basis at a low
cost. The Company expects that the focus of future research and development will
be to make further enhancements to the system software, firmware, hardware and
other equipment to increase the speed, capacity and functionality of the system,
to lower the cost of system equipment over time and, working with other
companies, to expand the scope of utility and non-utility services that may be
offered on the system. The Company's future success will depend, in part, on the
Company's success in these development projects which will require continued
substantial investments. See "Risk Factors--Technological Performance and
Buildout of the System; Rapid Technological Change and Uncertainty."
 
    As part of the Company's research and development efforts, the Company has
worked closely with current and potential customers in conducting pilot trials
and jointly developing system specifications and requirements.
 
COMPETITION
 
    The emerging market for utility network automation systems, and the
potential market for other applications accessible once a common infrastructure
is in place, have led electronics, communications and utility product companies
to begin development of various systems, some of which currently compete, and
others of which may in the future compete, with the CellNet system. The Company
believes its only significant direct competitor in the marketplace at the
present time is Itron, an established manufacturer and seller of hand-held and
drive-by automated meter reading equipment ("AMR") to utilities. Itron has
announced the development of its Genesis-TM-system, a radio network similar to
the Company's for meter reading purposes and is presently offering that system
in the marketplace. The Company believes Itron has signed at least two contracts
with utilities for the commercial installation of its Genesis-TM- system.
 
    Metricom, Inc. a provider primarily of subscriber-based, wireless data
communications for users of portable and desktop computers, First Pacific
Networks, a provider primarily of bandwidth efficient
 
                                       53
<PAGE>
wireline communications technology, and Lucent Technologies are examples of
companies whose technology might be adapted for NMR and who may become direct
competitors of the Company in the future. Schlumberger is developing a fixed
network system or application in cooperation with Motorola for meter reading as
well. Schlumberger, Lucent Technologies and First Pacific Networks either have
conducted or are in the process of conducting pilot trials of utility network
automation systems. Established suppliers of equipment, services and technology
to the utility industry such as Asea Brown Boveri and General Electric could
expand their current product and service offerings in the marketplace so as to
compete directly with the Company, although they have not yet done so. Many of
the Company's present and potential future competitors have significantly
greater financial, marketing, technical and manufacturing resources, name
recognition and experience than the Company. There may be many potential
alternative solutions to the Company's NMR services. The Company's competitors
may be able to respond more quickly to new or emerging technologies and changes
in customer requirements, or devote greater resources to the development,
promotion and sale of their products and services than the Company. While
CellNet believes its technology is widely regarded as competitive at the present
time, there can be no assurance that the Company's competitors will not succeed
in developing products or technologies that are better or more cost effective.
In addition, current and potential competitors may make strategic acquisitions
or establish cooperative relationships among themselves or with third parties,
thereby increasing their ability to address the needs of the Company's
prospective customers. Accordingly, it is possible that new competitors or
alliances among current and new competitors may emerge and rapidly gain
significant market share. In addition, if the Company achieves significant
success it could draw additional competitors into the market. Traditional
providers of wireless services may in the future choose to enter the Company's
markets. However, such telecommunications applications are not well suited for
use in NMR or similar applications given certain technical challenges and
economic costs such as high embedded spectrum costs. Such existing and future
competition could materially adversely affect the pricing for the Company's
services and the Company's ability to sign long-term contracts and maintain
existing agreements with utilities. Competition for services relating to
non-utility applications may be more intense than competition for utility NMR
services. There can be no assurance that the Company will be able to compete
successfully against current and future competitors, and any failure to do so
would have a material adverse effect on the Company's business, operating
results, financial condition and cash flow.
 
    The Company believes the principal competitive factors for NMR services
include price, quality of service, system functionality, reliability, and ease
of installation. The Company believes it competes favorably in these areas. In
particular, the Company believes that it has developed the first commercially
deployed, large-scale network-based NMR system capable of simultaneously
collecting, processing, transporting and sharing data from millions of endpoints
on an efficient and timely basis.
 
REGULATION
 
    The Company's network equipment uses radio spectrum, and as such, is subject
to regulation by the FCC. In addition, CellNet intends to provide services as a
private carrier. This status allows services to be provided pursuant to
individual contracts without being subject to many of the statutory requirements
and FCC and state regulations that govern the provision of common carrier
services. The Company's network equipment uses both licensed radio spectrum
allocated for MAS operations in the 928/952 MHz band, and unlicensed spectrum in
the 902-928 MHz band. In order to obtain a license to operate the Company's
network equipment in the 928/952 MHz band, license applicants may need to obtain
a waiver of various sections of the FCC's rules. Although the Company has
obtained such waivers for its licensed systems routinely in the past, and
expects the required waivers to be granted on a routine basis in the future,
there can be no assurance that the Company will be able to obtain such waivers
on a timely basis or to obtain them at all. In addition, as the amount of
spectrum in the 928/952 MHz band is limited, issuance of these licenses is
contingent upon the availability of spectrum in the area(s) for which the
licenses are requested. The Company might not be able to obtain licenses to the
spectrum it needs in every area in which it has prospective customers. The FCC's
rules, subject to a number of limited exceptions, permit third parties
 
                                       54
<PAGE>
such as CellNet to operate on spectrum licensed to utilities to provide other
services. The Company plans to use these provisions of the FCC's rules to expand
its CellNet system. The FCC has the authority to amend its rules at any time and
such changes could have a material adverse effect on the Company's spectrum
utilization strategy. The FCC requires that a minimum configuration of an MAS
system be in operation within eighteen months from the initial date of the grant
of the system authorization or risk forfeiture of the license for the MAS
frequencies. The eighteen month deadline may be extended upon a showing of good
cause, but there is no assurance that the FCC will grant any such extension. The
Company is responding by selectively building out transmission capacity in some
areas where it does not yet have utility telecommunications service contracts
and may permit licenses to lapse in certain areas.
 
    No license is needed to operate the Company's equipment utilizing the
902-928 MHz band, although the equipment must be certified by the Company and
the FCC as being compliant with certain FCC restrictions on radio frequency
emissions designed to protect licensed services from objectionable interference.
While the Company believes it has obtained all required certifications for its
products, the FCC could modify the limits imposed on such products or otherwise
impose new authorization requirements, and in either case, such changes could
have a material adverse impact on the Company's business. The FCC recently
completed a new rulemaking proceeding designed to better accommodate the
cohabitation in the 902-928 MHz band of existing licensed services with newly
authorized and expanded uses of licensed systems, and existing and newly
designed unlicensed devices like those used by the Company. In this proceeding,
the FCC expressly recognized the rights of such unlicensed services to operate
under certain delineated operating parameters even if the potential for
interference to the licensed operations exists. The Company's systems will
operate within those specified parameters. The FCC retains the right to modify
those rules or to allow for other uses of this spectrum that might create
interference to the Company's systems, in either case with a material adverse
impact on the Company's business or operations in these frequency bands.
 
    While the Company intends to offer non-utility services as a private carrier
and in accordance with FCC Rules, each such service offering would need to be
reviewed relative to these rules. The FCC's rules currently prohibit the use of
the MAS frequencies on which the Company is operating its systems for the
provision of common carrier service offerings. In the event that it is
determined that a particular service offering does not comply with the rules,
the Company may be required to restructure such offering or to access other
frequencies for the purpose of providing such service. There can be no
assurances that the Company will gain access to such other frequencies. Future
interpretation of regulations by the FCC or changes in the regulation of the
Company's industry by the FCC or other regulatory bodies or legislation by
Congress could have a material adverse effect on the Company's operations.
 
EMPLOYEES
 
    As of June 30, 1996, CellNet had 443 employees, including 88 in product
development, 226 in materials and manufacturing, 33 in sales and marketing, 65
in field service and support, and 31 in administration. None of the Company's
employees is currently represented by a labor union. The Company believes that
its relationship with its employees is good.
 
PROPERTIES
 
    The Company's administrative, sales and marketing, product development and
production facilities are located in San Carlos, California, where the Company
leases approximately 66,000 square feet under an agreement which expires on
December 31, 2000. The Company will require additional space to meet its
currently anticipated requirements for expansion and has leased an additional
26,000 square feet of office space near its present office complex. A subsidiary
of the Company leases approximately 30,000 square feet of factory and warehouse
space in Kansas City, Missouri where meter retrofit operations are carried out.
The Company anticipates that it will be able to acquire additional space as
required for its operations on acceptable terms.
 
                                       55
<PAGE>
LITIGATION
 
    Although the Company has been granted federal registration of its "CellNet"
trademark, in January 1995 Century Telephone Enterprises, Inc. ("Century
Telephone") filed a petition for cancellation in an attempt to challenge such
registration. The matter is currently pending before the Trademark Trial and
Appeal Board of the U.S. Patent and Trademark Office. CellNet and Century
Telephone are the sole parties in the action. If such challenge were successful,
the Company could lose its registration and could be required to adopt a new
trademark and possibly a new or modified corporate name. CellNet could encounter
similar challenges in the future. See "Risk Factors--Uncertainty of Protection
of Copyrights, Patents and Proprietary Rights."
 
    Although the Company has been granted federal registration of its "CellNet"
trademark, in January 1995 Century Telephone Enterprises, Inc. ("Century
Telephone") filed a petition for cancellation in an attempt to challenge such
registration. The matter is currently pending before the Trademark Trial and
Appeal Board of the U.S. Patent and Trademark Office. CellNet and Century
Telephone are the sole parties in the action. If such challenge were successful,
the Company could lose its registration and could be required to adopt a new
trademark and possibly a new or modified corporate name. CellNet could encounter
similar challenges in the future.
 
    In October 1996 Itron, Inc., one of the Company's competitors, filed a
complaint against the Company in the Federal District Court in Minnesota
alleging that the Company infringes an Itron patent which was issued in
September 1996. Itron is seeking a judgment for damages, attorneys fees and
injunctive relief. The Company believes, based on its current information, that
the Company's products do not infringe any valid claim in the Itron patent, and
in the Company's opinion, the ultimate outcome of the lawsuit is not expected to
have a material adverse effect on its results of operations or financial
condition.
 
    On October 31, 1996, a complaint SETTLE V. SEIDL, ET AL. No. 398464, was
filed in the Superior Court of California for the County of San Mateo against
the Company, certain of its officers and directors, Montgomery Securities and
Morgan Stanley & Co., Inc. The complaint, which is a purported class action
filed on behalf of the Company's stockholders which purchased shares in the
Company's initial public offering, seeks unspecified damages and rescission for
alleged liability under various provisions of the federal securities laws and
California state law. Plaintiff alleges that the Prospectus and Registration
Statement dated September 26, 1996, pursuant to which the Company issued
5,000,000 shares of Common Stock to the public, contained materially misleading
statements and/or omissions in that defendants were obligated to disclose, but
failed to disclose, that a patent conflict with Itron, Inc. was likely to ensue.
On November 8 and 13, 1996, two additional complaints, KAREN ZEILLY V. CELLNET
DATA SYSTEMS, INC. ET AL. No. 398551 and HOWARD FIENMAN AND GERALD SLAPSOWITZ V.
CELLNET DATA SYSTEMS, INC. ET AL. No. 398560, were filed in the Superior Court
of California for the County of San Mateo. These cases are essentially similar
in nature to the SETTLE case and are expected to be consolidated for trial with
the SETTLE case. The Company believes that the allegations in these complaints
are without merit and intends to defend these actions vigorously. In the
Company's opinion, the ultimate outcome of these lawsuits is not expected to
have a material adverse effect on its results of operations or financial
conditions.
 
                                       56
<PAGE>
                                   MANAGEMENT
 
EXECUTIVE OFFICERS AND DIRECTORS
 
    The following table sets forth certain information concerning the executive
officers and directors of the Company as of June 30, 1996.
 
<TABLE>
<CAPTION>
NAME                                    AGE                                POSITION
- ----------------------------------      ---      -------------------------------------------------------------
<S>                                 <C>          <C>
John M. Seidl.....................          57   President, Chief Executive Officer and Director
 
Cree A. Edwards...................          39   Vice President, Business Development
 
Robert A. Hayes...................          44   Vice President, Development
 
James J. Jennings.................          49   Vice President, Sales and Marketing
 
Larsh M. Johnson..................          38   Vice President and Chief Technology Officer
 
Paul G. Manca.....................          37   Vice President and Chief Financial Officer
 
Philip H. Mallory.................          56   Vice President and General Manager, Services and Operations
 
David L. Perry....................          55   Vice President, General Counsel, Secretary and Chief
                                                   Administrative Officer
 
Paul M. Cook......................          72   Chairman of the Board
 
Neal M. Douglas(2)................          37   Director
 
William C. Edwards(2).............          67   Director
 
William Hart(2)...................          56   Director
 
Brian Kwait.......................          35   Director
 
Nancy E. Pfund(1).................          40   Director
 
Paul J. Salem(1)..................          32   Director
 
Henry B. Sargent(1)...............          62   Director
</TABLE>
 
- ------------------------
 
(1) Member of the Audit Committee
 
(2) Member of the Compensation Committee
 
    JOHN M. SEIDL became President, Chief Executive Officer and a director of
the Company in September 1994. From December 1992 to September 1994, Mr. Seidl
served as a director of St. Mary's Land & Exploration Company, CRSS, Inc., J.B.
Poindexter, Inc. and a privately-held company. From January 1989 through
December 1992, Mr. Seidl served as a director of MAXXAM, Inc., an aluminum,
forest products and real estate concern, and Chairman and Chief Executive
Officer of Kaiser Aluminum Corporation. From September 1990 through December
1992 Mr. Seidl also served as President of MAXXAM, Inc. Previously, Mr. Seidl
was Executive Vice President, from July 1985 to May 1986, and President and
Chief Operating Officer, from May 1986 to January 1989, of Enron Corp., an
energy company. Mr. Seidl currently is a director of St. Mary's Land &
Exploration Company and several privately-held companies and non-profit
organizations. He received a B.S. degree in Engineering from the United States
Military Academy, and M.P.A. and Ph.D. degrees in Political Economy from Harvard
University.
 
    CREE A. EDWARDS is a co-founder of the Company and has served as Vice
President, Business Development since January 1994. Mr. Edwards was President of
the Company from October 1984 to February 1990 and Executive Vice President of
the Company from February 1990 to January 1994. Prior to founding CellNet in
1984, Mr. Edwards was an Area Sales Manager for Octel Communications
Corporation, a voice processing manufacturer, from September 1984 to September
1985, and a Major Accounts
 
                                       57
<PAGE>
Manager for the General Electric Information Services Company from March 1983 to
September 1984. He received a B.A. degree in Economics from the University of
California at Davis.
 
    ROBERT A. HAYES joined the Company in January 1993 as Vice President,
Special Assistant to the President. He became Vice President, Software
Development in March 1994 and was named Vice President, Development in January
1995. From February 1991 to December 1992, Mr. Hayes held a number of positions
with Everex Systems, Inc. ("Everex"), a computer hardware manufacturer,
including Vice President of Manufacturing, Vice President of Quality and
Service, Manager of the Network Division and Group Manager of Service. Everex
filed for Chapter 11 bankruptcy protection in January 1993. Mr. Hayes received
B.S. and M.C.E. degrees in Civil Engineering from Rice University.
 
    JAMES J. JENNINGS joined the Company in August 1994 and has served as Vice
President, Sales and Marketing since that time. From April 1988 until July 1994,
Mr. Jennings was a Vice President of Octel Communications Corporation, a voice
processing manufacturer, where he served in a variety of domestic and
international sales, marketing and business development capacities. Mr. Jennings
served as an officer in the United States Army from 1968 to 1975. Mr. Jennings
holds a B.S. degree in Engineering from the United States Military Academy and
an M.B.A. degree from the University of San Francisco.
 
    LARSH M. JOHNSON is a co-founder of the Company and has served in several
vice presidential positions from October 1984 to December 1994 and, since
January 1995, as Vice President and Chief Technology Officer. While at CellNet
and prior to co-founding the Company in 1984, he was a self-employed product
design consultant from May 1983 to June 1985 and Director of Product Development
at Interactive Communications Corporation, a video systems company, from
February 1984 to June 1985. Mr. Johnson was an Engineering Manager at Digital
Optics Corporation, a company specializing in electro-optical systems, from
March 1981 to April 1983 and an electrical engineer at Systems Control
Corporation, a computer hardware company, from June 1980 to April 1981. He
received B.S. and M.S. degrees in Mechanical Engineering from Stanford
University.
 
    PAUL G. MANCA joined the Company in May 1995 as Vice President and Chief
Financial Officer. From March 1993 to May 1995, he was the Managing Director and
Group Head of the Communications Group at BZW/Barclays Bank. Mr. Manca joined
BZW/Barclays Bank as Vice President, Merchant Banking Division in February 1987.
From June 1980 to February 1987, Mr. Manca was employed in the corporate finance
group of the Canadian Imperial Bank of Commerce. He received a B.A. degree in
Economics from the University of California, Berkeley and an M.B.A. degree in
Finance from Golden Gate University.
 
    PHILIP H. MALLORY joined the Company in January 1995 as Vice President and
General Manager, Services. In June 1996, he assumed the additional duties of
Vice President, Operations. From June 1992 to January 1995, Mr. Mallory held
various positions at CAE-Link Corporation, a defense contractor, including
Director of Strategic Planning, Director--Product Management and Director -
Department of Defense Marketing. Mr. Mallory served as a career officer in the
United States Army from June 1961 to August 1991, attaining the rank of Major
General prior to his retirement. During his army career he held a number of
posts, including Commanding General of the 2nd Armored Division, NATO Advisor to
the Secretary of Defense, and the Commanding General of the 7th Army Training
Command. Mr. Mallory received a B.S. degree in Engineering from the United
States Military Academy and an M.S. degree in Engineering - Applied Science from
the University of California, Davis. Mr. Mallory also attended the Industrial
College of the Armed Forces in Washington, D.C., where he attained the
equivalent of a master's degree in Resource Management.
 
    DAVID L. PERRY joined the Company in November 1994 as Vice President,
General Counsel and Secretary, and was appointed Chief Administrative Officer in
February 1996. From January 1992 through November 1994, Mr. Perry was engaged as
an attorney in private practice. From January 1984 through December 1991, Mr.
Perry was Vice President and General Counsel of Kaiser Aluminum Corporation.
From August 1969 through December 1983, Mr. Perry served in a variety of
capacities in Kaiser
 
                                       58
<PAGE>
Aluminum's Law Department. Mr. Perry received a B.A. degree from Amherst College
and a J.D. degree from the Boalt Hall School of Law, University of California,
Berkeley.
 
    PAUL M. COOK has been a director of the Company continuously since August
1990. Mr. Cook became Chief Executive Officer of the Company in August 1990, and
assumed the additional title of President in 1992. He relinquished the positions
of President and Chief Executive Officer in September 1994. Since June 1995, Mr.
Cook has been the Chief Executive Officer and Chairman of the Board of DIVA
Systems Corp., a company developing video-on-demand products. Until his
retirement in April 1990, Mr. Cook was Chief Executive Officer of Raychem
Corporation, a plastics and insulation manufacturer, which he founded in 1957.
Since September 1994, Mr. Cook has served as Chairman of the Board of SRI
International, Inc., and as a director of Raychem Corporation. Currently, Mr.
Cook is also a director of Chemfab Corporation. He received a B.S. degree from
the Massachusetts Institute of Technology.
 
    NEAL M. DOUGLAS has been a director of the Company since October 1993. Since
January 1993 he has been a general partner of AT&T Ventures Company, L.P. ("AT&T
Ventures"), a venture capital firm. From May 1989 to January 1993, he was a
partner of New Enterprise Associates, another venture capital firm. Mr. Douglas
also serves as a director of two privately held companies.
 
    WILLIAM C. EDWARDS has been a director of the Company from October 1985 to
April 1986 and has been a director continuously since March 1991. Since October
1968 he has been a general partner of Bryan & Edwards, an investment
partnership. Mr. Edwards also serves as a director of Western Atlas, Inc. and
two privately held companies.
 
    WILLIAM HART has been a director of the Company since October 1992. He has
been a general partner of Technology Partners, a venture capital firm, since its
founding in 1979. Mr. Hart also serves as a director of Trimble Navigation,
Ltd., Silicon Gaming, Inc. and several privately held corporations.
 
    BRIAN KWAIT has been a director of the Company since October 1995. Mr. Kwait
has been a principal at Odyssey Partners, L.P. ("Odyssey"), a private investment
firm, since August 1989. Mr. Kwait also serves as a director of The Scotsman
Group, Inc. and one privately held company.
 
    NANCY E. PFUND has been a director of the Company since January 1991. Since
December 1989, she has been an employee of Hambrecht & Quist Group ("H&Q"), an
investment banking firm. Ms. Pfund is also a principal of Hambrecht & Quist
Venture Partners and a general partner of H&Q Environmental Principals. She
serves as a director of Gensym Corp.
 
    PAUL J. SALEM has been a director of the Company since January 1996. Mr.
Salem has been a vice president of Providence Ventures Inc., an investment
management firm, since June 1992. From August 1991 to June 1992, Mr. Salem was
an associate at Morgan Stanley & Co. Incorporated, an investment banking firm.
Mr. Salem also serves as a director of several privately held companies. Mr.
Salem tendered his resignation as a director of the Company on December 20,
1996, effective as of that date.
 
    HENRY B. SARGENT has been a director of the Company since January 1996. Mr.
Sargent has been President, Chief Executive Officer and a director of El Dorado
Investment Company ("El Dorado"), a venture capital firm, for more than the past
five years. From May 1987 to June 1995, he was also Executive Vice President,
Chief Financial Officer and a director of Pinnacle West Capital Corp., an
electric utility holding company. Mr. Sargent also serves as a director of
Pinnacle West Capital Corp., Arizona Public Service Co., Megafood Stores, Inc.
and several privately held companies.
 
    William C. Edwards is the father of Cree A. Edwards. There are no other
family relationships among the directors or executive officers of the Company.
 
                                       59
<PAGE>
BOARD OF DIRECTORS
 
    The Company's Bylaws authorize a Board of Directors that can range in size
from six to 11 directors, with the number of directors presently set at ten. The
Company currently has nine directors and one vacancy. All directors hold office
until the next annual meeting of stockholders or until their successors have
been elected. Officers of the Company serve at the discretion of the Board of
Directors. Under the terms of the Shareholders' Agreement among the Company and
the holders of 69.4% of the issued and outstanding shares of capital stock of
the Company, the Company agreed to set the authorized number of directors on the
Board of Directors at ten, and the stockholders party thereto have agreed to
elect the following persons to the Board of Directors: (i) one candidate
selected by H&Q, currently Nancy E. Pfund; (ii) one candidate selected by El
Dorado, currently Henry B. Sargent; (iii) Paul M. Cook; (iv) one candidate
selected by Banner Partners, currently William C. Edwards; (v) one candidate
selected by AT&T Ventures, currently Neal M. Douglas; (vi) one candidate
selected by Odyssey, currently Brian Kwait; (vii) one candidate selected by
Providence Media Partners L.P., currently Paul J. Salem; (viii) one candidate
selected by Kleiner, Perkins, Caufield & Byers, which position is currently
vacant; and (ix) the Chief Executive Officer of the Company, currently John M.
Seidl. The foregoing voting obligations terminated upon the closing of the
Initial Public Offering. Following the Initial Public Offering, the Company will
continue to be obligated to nominate for election as directors the persons
designated by the parties to the Shareholders' Agreement for as long as such
parties continue to hold not less than 700,000 shares of Common Stock (as such
number may be adjusted from time to time for stock splits, consolidations or
other similar events). The parties to the Shareholders' Agreement have also
agreed to take such action as is necessary to retain the right of cumulative
voting in the election of directors and to maintain a Board of Directors of not
less than eight directors until August 15, 1997. See "Risk
Factors--Shareholders' Agreement" and "Description of Capital Stock--Common
Stock."
 
DIRECTORS' COMPENSATION
 
    The Company does not pay any compensation to directors for serving in that
capacity, nor does it reimburse directors for expenses incurred in attending
board meetings. Under the terms of the Shareholders' Agreement, the Company has
agreed to reimburse the directors elected pursuant to the Shareholders'
Agreement for such expenses following the closing of this Offering for so long
as such persons continue to serve as directors.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
    The Compensation Committee of the Board of Directors consists of three
non-employee directors, Mr. Edwards, Chairman, and Messrs. Douglas and Hart. The
Compensation Committee makes recommendations to the Board of Directors
concerning salaries and incentive compensation for employees of and consultants
to the Company. Mr. Edwards is the father of Cree A. Edwards, an executive
officer of the Company. No interlocking relationship exists between the
Company's Board of Directors or Compensation Committee and the board of
directors or compensation committee of any other party, nor has any such
relationship existed in the past. Entities affiliated with Messrs. Edwards,
Douglas and Hart are stockholders of the Company and have entered into financing
arrangements with the Company from time to time. See "Certain Transactions."
 
AUDIT COMMITTEE
 
    The Audit Committee of the Board of Directors consists of three non-employee
directors, Ms. Pfund, Chair, and Messrs. Salem and Sargent. The Audit Committee
reviews the nature, scope and results of the independent audit of the Company,
the Company's accounting principles and internal accounting controls and other
matters relating to the relationship of the independent auditors with the
Company.
 
                                       60
<PAGE>
EXECUTIVE COMPENSATION
 
    The following table sets forth certain information for the year ended
December 31, 1995 regarding the compensation of the Company's Chief Executive
Officer and each of the other four most highly compensated executive officers
whose annual compensation (salary and bonus) for services rendered in all
capacities to the Company during the year ended December 31, 1995 exceeded
$100,000 (collectively, the "Named Executive Officers").
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                   ANNUAL COMPENSATION
                                                          -------------------------------------
                                                                                  OTHER ANNUAL       ALL OTHER
NAME AND PRINCIPAL POSITION                                 SALARY      BONUS     COMPENSATION    COMPENSATION(1)
- --------------------------------------------------------  ----------  ----------  -------------  -----------------
<S>                                                       <C>         <C>         <C>            <C>
John M. Seidl,
  President and Chief Executive Officer.................  $  300,000  $  135,000       --            $   1,237
 
James J. Jennings,
  Vice President, Sales and Marketing...................     175,060      --           --                  902
 
Robert A. Hayes,
  Vice President, Development...........................     165,000      10,000       --                  872
 
Larsh M. Johnson,
  Vice President and Chief Technology Officer...........     165,000      --           --                  872
 
Philip H. Mallory,
  Vice President and General Manager, Services and
  Operations............................................     138,654      --       $  50,000(2)            762
</TABLE>
 
- ------------------------
 
(1) Represents premium payments made by the Company for life insurance,
    accidental death and dismemberment, and long-term disability policies.
 
(2) Represents a relocation allowance.
 
    OPTION GRANTS IN LAST YEAR.  The Company made no stock option grants or
restricted stock awards during the year ended December 31, 1995 to the Named
Executive Officers. However, during 1995 the Company did permit the Named
Executive Officers to exercise unvested, previously-granted stock options to
purchase shares of restricted stock with vesting terms comparable to the vesting
terms of the options exercised.
 
    AGGREGATED OPTION EXERCISES IN LAST YEAR AND YEAR-END OPTION VALUES  The
following table sets forth, for each of the Named Executive Officers, the shares
acquired and the value realized on each exercise of stock options during the
year ended December 31, 1995 and the year-end number and value of exercisable
and unexercisable options.
 
<TABLE>
<CAPTION>
                                                               NUMBER OF SECURITIES        VALUE OF UNEXERCISED
                                                              UNDERLYING UNEXERCISED     IN-THE MONEY OPTIONS AT
                                  SHARES                    OPTIONS AT 12/31/95(#)(2)       12/31/95($)(1)(2)
                               ACQUIRED ON       VALUE      --------------------------  --------------------------
NAME                          EXERCISE (#)(2) REALIZED ($)  EXERCISABLE  UNEXERCISABLE  EXERCISABLE  UNEXERCISABLE
- ----------------------------  --------------  ------------  -----------  -------------  -----------  -------------
<S>                           <C>             <C>           <C>          <C>            <C>          <C>
John M. Seidl...............       800,000    $  1,000,000           0              0    $       0    $         0
James J. Jennings...........       180,000         225,000           0              0            0              0
Robert A. Hayes.............             0               0     109,000        121,000      143,150        147,350
Philip H. Mallory...........       170,000         170,000           0              0            0              0
Larsh M. Johnson............       220,658         248,158     106,190        173,952      148,576        190,427
</TABLE>
 
- ------------------------
 
(1) Calculated by determining the difference between the fair value of the
    securities underlying the option on December 31, 1995 (which, for purposes
    of this table, is assumed to equal the fair value of the
 
                                       61
<PAGE>
    Company's Common Stock as last determined during fiscal 1995 on October 11,
    1995 by the Company's Board of Directors, or $1.50 per share), and the
    exercise price (ranging from $.05 to $.50 per share).
 
(2) From December 1994 through August 1995 the Company issued and sold pursuant
    to the early exercise of previously-granted options, an aggregate of
    1,770,658 shares of restricted Common Stock to Messrs. Seidl, Jennings,
    Mallory and Johnson at prices ranging from $.05 to $.50 per share, with the
    purchase prices of such shares equal to the original exercise prices of such
    options. Such shares of restricted stock were purchased with cash or by
    delivery of promissory notes by such Named Executive Officers to the
    Company. See "Certain Transactions." The loans represented by such
    promissory notes are full recourse, bear interest at rates ranging from
    6.04% to 7.92% per annum and mature on the fifth anniversary of such note.
    Each such promissory note is secured by the shares of Common Stock purchased
    with the proceeds of the loans. These shares are subject to repurchase by
    the Company at the original price paid per share upon the purchaser's
    cessation of service prior to the vesting of such shares. This repurchase
    right lapsed and the purchaser vested as to a certain percentage of the
    shares on the date of purchase and the repurchase right will lapse and the
    purchaser will vest in the balance of the shares in a series of equal
    quarterly or annual installments in accordance with the vesting schedule of
    the exercised options. Information with respect to the shares of restricted
    stock purchased by such Named Executive Officers is set forth below:
 
<TABLE>
<CAPTION>
                                         NUMBER OF          NUMBER OF          VALUE OF
                                         RESTRICTED      UNVESTED SHARES    UNVESTED SHARES
                                           SHARES              AT                 AT
NAME                                    PURCHASED(#)       12/31/95(#)        12/31/95($)
- ------------------------------------  ----------------  -----------------  -----------------
<S>                                   <C>               <C>                <C>
John M. Seidl.......................       1,200,000          750,000        $   1,125,000
James J. Jennings...................         180,000          117,000              175,500
Philip H. Mallory...................         170,000          127,500              191,250
Larsh M. Johnson....................         220,658          117,158              175,737
</TABLE>
 
INCENTIVE STOCK PLANS
 
    1992 STOCK OPTION PLAN.  The Company's 1992 Stock Option Plan (the "1992
Plan") was adopted by the Board of Directors and approved by the Company's
stockholders in September 1992. A total of 6,000,000 shares of Common Stock are
reserved for issuance under the 1992 Plan. As of June 30, 1996, 3,375,748 shares
of Common Stock had been issued upon exercise of stock options, and options to
purchase an aggregate of 2,416,642 shares were outstanding at a weighted average
exercise price of $.21615 per share, of which 1,357,726 shares were vested. In
connection with the adoption of the 1994 Plan described below, the 1992 Plan was
terminated and no additional options may be granted thereunder. Options
previously granted under the 1992 Plan will continue to be governed by the
provisions of such plan.
 
    1994 STOCK PLAN.  The Company's 1994 Stock Plan (the "1994 Plan") was
adopted by the Board of Directors in December 1994 and approved by the
stockholders in June 1995. Options granted under the 1994 Plan may be incentive
stock options, nonstatutory stock options or stock purchase rights. Employees
(including employee directors) and consultants (including nonemployee directors)
are eligible for nonstatutory stock options and stock purchase rights, and only
employees are eligible for incentive stock options under the 1994 Plan. The 1994
Plan is administered by the Board of Directors or a committee thereof. The plan
administrator has the authority to determine the fair market value of the
shares, select the employees and consultants to whom options and stock purchase
rights may be granted, determine the number of shares covered by each option and
stock purchase right granted, and determine the term, exercise price and vesting
schedule of options granted under the 1994 Plan.
 
    A total of 3,000,000 shares of Common Stock are reserved for issuance under
the 1994 Plan. As of June 30, 1996, 537,832 shares of Common Stock had been
issued upon exercise of stock options, options to
 
                                       62
<PAGE>
purchase an aggregate of 1,362,494 shares were outstanding at a weighted average
exercise price of $1.3489 per share, of which 158,212 shares were vested, and
1,099,674 shares remained available for future issuance under the 1994 Plan.
 
    In the event of a merger of the Company with or into another corporation or
a sale of substantially all of the Company's assets, the 1992 Plan and the 1994
Plan each provides that options issued under such plans will be assumed, or an
equivalent option substituted, by the successor corporation. If the successor
corporation does not agree to such assumption or substitution, the option will
vest in full and become exercisable.
 
    1996 EMPLOYEE STOCK PURCHASE PLAN.  The Company's 1996 Employee Stock
Purchase Plan (the "Purchase Plan") was adopted by the Board of Directors in
July 1996 and was approved by the stockholders in September 1996. A total of
1,200,000 shares of Common Stock are reserved for issuance under the Purchase
Plan. Under the Purchase Plan, the Company will withhold a specified percentage
of each salary payment to participating employees over certain offering periods.
Any employee who is then employed for at least 20 hours per week by the Company
(or any majority-owned subsidiary designated by the Board of Directors from time
to time), and who does not own 5% or more of the total combined voting power or
value of all classes of the capital stock of the Company or of any such
subsidiary, is eligible to participate in the Purchase Plan. Unless the Board of
Directors shall determine otherwise, each offering period will run for six
months, from November 1 to April 30 and from May 1 to October 31, except that
the first offering period will commence on the date of this Prospectus and end
on April 30, 1997. The price at which Common Stock may be purchased under the
Purchase Plan is equal to 85% of the fair market value of the Common Stock on
the first or last day of the applicable offering period, whichever is lower.
 
EMPLOYMENT CONTRACTS AND CHANGE OF CONTROL ARRANGEMENTS
 
    The Company entered into an employment agreement with Mr. Jennings in July
1994. The agreement provides for an annual base salary of $175,060 and certain
performance-based bonuses to be determined by the Company's President. As part
of the agreement, the Company granted to Mr. Jennings an option to purchase
180,000 shares of Common Stock at $.25 per share, with 10% vesting six months
from the date of hire and the remainder vesting at a rate of 5% per quarter. If
Mr. Jennings is terminated by the Company without cause at any time, he will
receive his annual base salary and benefits for an additional twelve months, and
40% of any unvested shares of restricted stock held by Mr. Jennings will become
vested as of the date of termination.
 
    Each of the Named Executive Officers are parties to an Employee Severance
Agreement with the Company which provides for accelerated vesting of their
respective stock options and for the lapse of the Company's rights to repurchase
unvested stock under all restricted stock purchase agreements upon the
occurrence of certain events following a change of control of the Company. These
events will occur if: (i) the Named Executive Officer's stock option agreement
or restricted stock purchase agreement is terminated without such officer's
consent, or if the terms of such agreements are not assumed by any successor to
the Company; (ii) the Named Executive Officer does not receive identical
securities or consideration, upon such officer's exercise of options or
restricted stock purchases, as other shareholders are receiving as part of such
change of control; (iii) six months have elapsed following the change of
control, so long as the Named Executive Officer remains employed by the Company;
or (iv) the Named Executive Officer is terminated or constructively terminated
following the change of control.
 
LIMITATIONS ON DIRECTORS' LIABILITIES AND INDEMNIFICATION
 
    The Company has adopted provisions in its Restated Certificate of
Incorporation that eliminate the personal liability of its directors for
monetary damages arising from breach of their fiduciary duties in certain
circumstances and authorize the Company to indemnify its directors and officers,
in each case to the fullest extent permitted by Delaware law. Such limitations
of liability do not apply to liabilities arising
 
                                       63
<PAGE>
under the Federal securities laws and do not affect the availability of
equitable remedies such as injunctive relief or rescission.
 
    The Company's Bylaws provide that the Company will indemnify its directors
and officers to the fullest extent permitted by Delaware law, including under
circumstances in which indemnification is otherwise discretionary under Delaware
law. The Company has entered into indemnification agreements providing for the
foregoing with its directors and executive officers. These indemnification
agreements may require the Company, among other things, to indemnify such
officers and directors against certain liabilities that may arise by reason of
their status or service as officers or directors and to advance their expenses
(including expenses of counsel) incurred as a result of any proceeding against
them as to which they could be indemnified.
 
    Although the Company has been granted federal registration of its "CellNet"
trademark, in January 1995 Century Telephone Enterprises, Inc. ("Century
Telephone") filed a petition for cancellation in an attempt to challenge such
registration. The matter is currently pending before the Trademark Trial and
Appeal Board of the U.S. Patent and Trademark Office. CellNet and Century
Telephone are the sole parties in the action. If such challenge were successful,
the Company could lose its registration and could be required to adopt a new
trademark and possibly a new or modified corporate name. CellNet could encounter
similar challenges in the future.
 
    In October 1996 Itron, Inc., one of the Company's competitors, filed a
complaint against the Company in the Federal District Court in Minnesota
alleging that the Company infringes an Itron patent which was issued in
September 1996. Itron is seeking a judgment for damages, attorneys fees and
injunctive relief. The Company believes, based on its current information, that
the Company's products do not infringe any valid claim in the Itron patent, and
in the Company's opinion, the ultimate outcome of the lawsuit is not expected to
have a material adverse effect on its results of operations or financial
condition.
 
    On October 31, 1996, a complaint SETTLE V. SEIDL, ET AL. No. 398464, was
filed in the Superior Court of California for the County of San Mateo against
the Company, certain of its officers and directors, Montgomery Securities and
Morgan Stanley & Co., Inc. The complaint, which is a purported class action
filed on behalf of the Company's stockholders which purchased shares in the
Company's initial public offering, seeks unspecified damages and rescission for
alleged liability under various provisions of the federal securities laws and
California state law. Plaintiff alleges that the Prospectus and Registration
Statement dated September 26, 1996, pursuant to which the Company issued
5,000,000 shares of Common Stock to the public, contained materially misleading
statements and/or omissions in that defendants were obligated to disclose, but
failed to disclose, that a patent conflict with Itron, Inc. was likely to ensue.
On November 8 and 13, 1996, two additional complaints, KAREN ZEILLY V. CELLNET
DATA SYSTEMS, INC. ET AL. No. 398551 and HOWARD FIENMAN AND GERALD SLAPSOWITZ V.
CELLNET DATA SYSTEMS, INC. ET AL. No. 398560, were filed in the Superior Court
of California for the County of San Mateo. These cases are essentially similar
in nature to the SETTLE case and are expected to be consolidated for trial with
the SETTLE case. The Company believes that the allegations in these complaints
are without merit and intends to defend these actions vigorously. In the
Company's opinion, the ultimate outcome of these lawsuits is not expected to
have a material adverse effect on its results of operations or financial
conditions.
 
                                       64
<PAGE>
                              CERTAIN TRANSACTIONS
 
    Since January 1, 1993, the Company has sold shares of Preferred Stock
convertible into an aggregate of 16,215,170 shares of Common Stock in a series
of private financings. In January 1993, shares of Series AA Preferred Stock
convertible into 1,510,284 shares of Common Stock were sold at an as-converted
price of $.50 per share. In October 1993 and December 1993, shares of Series BB
Preferred Stock convertible into 6,979,690 shares of Common Stock were sold at
an as-converted price of $2.375 per share. In connection with such sales, the
Company also issued warrants to acquire 766,888 shares of Series BB Preferred
Stock at an exercise price of $4.75 per share. In August 1994, shares of Series
CC Preferred Stock convertible into 6,431,536 shares of Common Stock were sold
at an as-converted price of $4.82 per share. In December 1994 and February 1995,
shares of Series DD Preferred Stock convertible into 1,293,660 shares of Common
Stock were sold at an as-converted price of $4.82 per share. The purchasers of
the Series BB Preferred Stock, Series CC Preferred Stock and Series DD Preferred
Stock included the following 5% or more stockholders, directors and entities
affiliated with directors.
 
<TABLE>
<CAPTION>
                                                                                                    SHARES OF
                                                                                                    SERIES BB
                                                        SHARES OF PREFERRED STOCK(1)                PREFERRED
                                              ------------------------------------------------   STOCK UNDERLYING
NAME                                           SERIES AA   SERIES BB   SERIES CC    SERIES DD      WARRANTS(2)
- --------------------------------------------  -----------  ----------  ----------  -----------  ------------------
<S>                                           <C>          <C>         <C>         <C>          <C>
DIRECTORS AND ENTITIES AFFILIATED WITH
  DIRECTORS
Paul and Marcia Cook Living Trust (Paul M.
  Cook).....................................      --           63,340      10,373      --               19,002
AT&T Ventures (Neal M. Douglas).............      --          631,580      48,842      --              126,316
Entities affiliated with William C.
  Edwards...................................     755,142      191,840      31,122       1,321           56,002
Technology Partners West Fund IV, L.P.
  (William Hart)............................      --           44,730      10,373         417           13,419
Odyssey Partners, L.P. (Brian Kwait)........      --        1,450,660     112,184      --              290,132
Entities affiliated with Hambrecht & Quist
  (Nancy E. Pfund)..........................      --          213,585      35,794       1,520           48,343
Pfund Polakoff Family Trust (Nancy E.
  Pfund)....................................      --            2,025      --          --                  426
Providence Media Partners L.P. (Paul J.
  Salem)....................................      --           --       1,037,344      44,044           --
Entities affiliated with Henry B. Sargent...      --          161,245      --          --               41,623
 
OTHER 5% OR MORE STOCKHOLDERS
Entities affiliated with Acorn Ventures,
  Inc.......................................      --          289,570     231,463       9,827           68,468
</TABLE>
 
- ------------------------
 
(1) Each share of Preferred Stock will automatically convert into two shares of
    Common Stock upon the closing of this Offering.
 
(2) Each warrant to purchase Series BB Preferred Stock is exercisable at a price
    of $4.75 per share and will expire immediately prior to the closing of this
    Offering. This Prospectus assumes that all of such warrants will be
    exercised and that the shares of Series BB Preferred Stock issuable upon
    such exercise will automatically convert into shares of Common Stock upon
    the closing of this Offering.
 
    Between April 28, 1993 and September 13, 1993, Acorn Ventures, Inc.
("Acorn") (a principal stockholder of the Company), Cree A. Edwards (an
executive officer of the Company), entities affiliated with William C. Edwards
("Edwards Entities") (a director of the Company; the Edwards Entities are
principal stockholders of the Company), the Paul and Marcia Cook Living Trust
("Cook Trust") (a
 
                                       65
<PAGE>
principal stockholder of the Company and an affiliate of Paul M. Cook, Chairman
of the Board of Directors of the Company), entities affiliated with H&Q
(affiliates of Nancy E. Pfund, a director of the Company), and entities
affiliated with Henry B. Sargent ("Sargent Entities") (a director of the
Company; the Sargent Entities are principal stockholders of the Company) loaned
the Company $500,000, $133,230, $711,100, $297,355, $265,300 and $579,490,
respectively, pursuant to promissory notes due on demand after October 1, 1993
and bearing interest at the rate of 4% per annum. In connection with the sale of
the Series BB Preferred Stock, the outstanding balance of principal and accrued
interest under such promissory notes was converted into shares of Series BB
Preferred Stock at a conversion price of $4.75 per share and warrants to
purchase .3 shares of Series BB Preferred Stock for each share of Series BB
Preferred Stock issued upon conversion of the promissory notes and accrued
interest, such that the Company issued and sold to Acorn, Cree A. Edwards, the
Edwards Entities, the Cook Trust, H&Q and the Sargent Entities 105,540, 28,380,
151,480, 63,340, 56,470 and 123,600 shares, respectively, of Series BB Preferred
Stock and warrants to purchase 31,662, 8,514, 45,444, 19,002, 16,941 and 37,080
shares, respectively, of Series BB Preferred Stock. The Company believes the
terms of these loans were no less favorable to the Company than loans negotiated
by such persons with unaffiliated third parties.
 
    On September 29, 1993, the Company issued and sold 400,000 shares of Common
Stock to Acorn, a stockholder of the Company, at a price per share of $.05.
These shares were granted as part of a transaction in which Acorn was required
to perform consulting services for the Company. These shares were subject to
repurchase by the Company until such rights lapsed in September 1995.
 
    On June 14, 1995, the Company issued and sold 200,000 shares of Common Stock
to Acorn at a price per share of $.50. Acorn paid cash for the shares. These
shares are subject to repurchase by the Company which right lapses over a
five-year period commencing in December 1994. On August 25, 1995, the terms of
the Company's agreement with Acorn were amended to provide for accelerated
release of such shares from the Company's repurchase option upon termination of
such agreement other than for cause. The transactions with Acorn were
unanimously approved by the Board of Directors of the Company and were on terms
the Company believes were no less favorable than would have been received from
unaffiliated third parties.
 
    On December 27, 1994 and January 27, 1995, the Company issued and sold
400,000 shares and 800,000 shares, respectively, of Common Stock to Mr. Seidl,
its President and Chief Executive Officer, at a price of $.25 per share based on
the early exercise of previously-granted options with an equivalent exercise
price. In connection with the sale of such shares, the Company loaned Mr. Seidl
$300,000. The loans are full recourse, bear interest at the rate of 7.74% per
annum in the case of $100,000 of principal and at the rate of 7.92% per annum in
the case of $200,000 of principal, are due on the earlier of termination of Mr.
Seidl's employment or December 26, 1999 and January 25, 2000, respectively, and
are secured by the shares of Common Stock purchased with the proceeds of such
loans.
 
    On July 21, 1995, the Company issued and sold 170,000 shares of Common Stock
to Mr. Mallory, an executive officer of the Company, at a price of $.50 per
share, based on the early exercise of a previously-granted option with an
equivalent exercise price. In connection with the sale of such shares, the
Company loaned Mr. Mallory $85,000. The loan is full recourse, bears interest at
the rate of 6.28% per annum, is due on the earlier of termination of Mr.
Mallory's employment or July 21, 2000 and is secured by the shares of Common
Stock purchased with the proceeds of such loan.
 
    On July 31, 1995, the Company issued and sold 180,000 shares of Common Stock
to Mr. Manca, an executive officer of the Company at a price of $.50 per share
based on the early exercise of a previously-granted option with an equivalent
exercise price. In connection with the sale of such shares, the Company loaned
Mr. Manca $90,000. The loan is full recourse, bears interest at the rate of
6.28% per annum, is due on the earlier of termination of Mr. Manca's employment
or July 31, 2000 and is secured by the shares of Common Stock purchased with the
proceeds of such loan.
 
                                       66
<PAGE>
    On August 1, 1995, the Company issued and sold 45,110 shares of Common Stock
to Ronald W. Goodall, a former executive officer of the Company who resigned in
1996, at a price of $.05 per share, based on the early exercise of a
previously-granted option with an equivalent exercise price. On August 1, 1995,
the Company also issued and sold 144,000, 110,000 and 40,000 shares of Common
Stock to Messrs. Jennings, Johnson and Goodall, respectively, each an executive
officer of the Company, at a price of $.25 per share based on the early exercise
of previously-granted options with equivalent exercise prices. On August 1,
1995, the Company also issued and sold 155,408, 50,000 and 110,658 shares of
Common Stock to Messrs. Edwards, Goodall and Johnson, respectively, each an
executive officer of the Company, at a price of $.50 per share, based on the
early exercise of previously-granted options with an equivalent exercise price.
In connection with the sale of shares, the Company loaned Messrs. Goodall,
Jennings, Johnson and Edwards $37,255, $36,000, $82,829 and $77,704,
respectively. The loans are full recourse, bear interest at the rate of 6.04%
per annum, are due on the earlier of termination of employment or August 1, 2000
and are secured by the shares of Common Stock purchased with the proceeds of
such loans. Notwithstanding the foregoing, the Company agreed to extend the
maturity date of the restricted stock purchase loan of Mr. Goodall until
December 31, 1996, at which time a balance of $40,455 in principal and accrued
interest will be due. The Company will exercise its option to repurchase the
unvested portion of Mr. Goodall's restricted stock at the original purchase
price, and such amount will be credited against the amount of principal and
interest due.
 
    The amounts of outstanding indebtedness, including interest, on the loans to
executive officers described above as of June 30, 1996, which were the largest
aggregate amount of indebtedness owed by each of the officers at any time, were
as follows: Mr. Seidl, $334,315.40, Mr. Mallory, $90,060.13, Mr. Manca,
$95,202.94, Mr. Jennings, $37,995.68, Mr. Johnson, $87,420.68, Mr. Edwards,
$82,011.57 and Mr. Goodall, $39,135.83. The terms (including the terms of the
promissory notes) of the sale of shares of Common Stock by the Company to
Messrs. Seidl, Mallory, Manca, Jennings, Johnson, Edwards and Goodall were
unanimously approved by the Board of Directors of the Company. The shares were
issued upon the early exercise of unvested options and are subject to repurchase
by the Company at the original price paid per share upon such executive
officer's termination of employment prior to vesting in such shares. The
repurchase rights lapse and the shares vest at the same rate as the prior
vesting schedule of the exercised options. See "Management--Executive
Compensation." The sales price of each sale was the fair market value of the
Company's Common Stock on the original date of grant of each option to purchase
Common Stock, as determined by the Board of Directors of the Company.
 
                                       67
<PAGE>
                             PRINCIPAL STOCKHOLDERS
 
    The following table sets forth certain information regarding beneficial
ownership of the Company's Common Stock as of June 30, 1996 as adjusted to
reflect the sale of shares in the Initial Public Offering (i) each person who is
known by the Company to own beneficially more than five percent of the Common
Stock, (ii) each of the Named Executive Officers, (iii) each of the Company's
directors and (iv) all current directors and executive officers as a group.
 
<TABLE>
<CAPTION>
                                                       NUMBER
                                                       SHARES
                                                    BENEFICIALLY  PERCENT BENEFICIALLY
BENEFICIAL OWNER                                      OWNED(1)         OWNED(1)(2)
- --------------------------------------------------  ------------  ---------------------
<S>                                                 <C>           <C>                    <C>
Odyssey Partners, L.P. (3) .......................
  31 West 52nd Street
  New York, NY 10019                                   3,705,952             9.1%
 
Providence Media Partners L.P. ...................
  50 Kennedy Plaza
  Providence, RI 02903                                 2,162,776             5.3
 
Paul M. Cook (4) .................................
  PM Cook Associates
  Bldg. IR-242
  333 Ravenswood Avenue
  Menlo Park, CA 94025                                 2,132,088             5.2
 
Banner Partners (5) ..............................
  3000 Sand Hill Road
  Bldg. 1, Suite 190
  Menlo Park, CA 94025                                 2,037,912             5.0
 
William C. Edwards (6) ...........................
  3000 Sand Hill Road
  Bldg. 1, Suite 190
  Menlo Park, CA 94025                                 1,894,228             4.7
 
Acorn Ventures, Inc. (7) .........................
  11400 S.E. Sixth Street, Suite 120
  Bellevue, WA 98004                                   1,755,400             4.3
 
AT&T Ventures Company, L.P. (8) ..................
  3000 Sand Hill Road
  Bldg. 4, Suite 235
  Menlo Park, CA 94025                                 1,613,476             4.0
 
El Dorado Investment Company (9) .................
  400 E. Van Buren, Suite 750
  Phoenix, AZ 85004                                    1,603,152             3.9
 
John M. Seidl.....................................     1,200,000             3.0
 
Robert A. Hayes (10)..............................       136,000            *
 
James J. Jennings.................................       180,000            *
 
Larsh M. Johnson (11).............................       416,268             1.0
 
Philip H. Mallory.................................       170,000            *
 
Neal M. Douglas (12)..............................     1,613,476             4.0
 
William Hart (13).................................       998,914             2.5
 
Brian Kwait (3)(14)...............................     3,705,952             9.1
</TABLE>
 
                                       68
<PAGE>
<TABLE>
<CAPTION>
                                                       NUMBER
                                                       SHARES
                                                    BENEFICIALLY  PERCENT BENEFICIALLY
BENEFICIAL OWNER                                      OWNED(1)         OWNED(1)(2)
- --------------------------------------------------  ------------  ---------------------
<S>                                                 <C>           <C>                    <C>
Nancy E. Pfund (15)...............................     1,367,316             3.4
 
Paul J. Salem (16)................................     2,162,776             5.3
 
Henry B. Sargent (17).............................     1,778,306             4.4%
 
All directors and executive officers as a group
  (16 persons) (18)...............................    19,575,226            48.2
</TABLE>
 
- ------------------------
*   Less than 1%
 
 (1) Beneficial ownership is determined in accordance with the rules and
    regulations of the Securities and Exchange Commission. In computing the
    number of shares beneficially owned by a person and the percentage of
    ownership of that person, shares of Common Stock subject to options or
    warrants held by that person that are currently exercisable or exercisable
    within 60 days of June 30, 1996 are deemed outstanding. Such shares,
    however, are not deemed outstanding for the purpose of computing the
    percentage ownership of any other person. The persons named in this table
    have sole voting and investment power with respect to all shares of Common
    Stock shown as beneficially owned by them, subject to community property
    laws where applicable and except as indicated in the other footnotes to this
    table.
 
 (2) Percentage of beneficial ownership is based on 40,627,538 shares of Common
    Stock outstanding after the Company's Initial Public Offering and assumes
    the exercise of warrants on a cash basis to purchase 4,132,970 shares of
    Common Stock effective upon the closing of the Initial Public Offering.
 
 (3) Includes 580,264 shares issuable upon the exercise of warrants held by
    Odyssey, all of which are assumed to have been exercised upon the closing of
    the Initial Public Offering.
 
 (4) Consists of 1,645,630 shares beneficially owned by the Paul and Marcia Cook
    Living Trust, dated April 21, 1992, 120,000 shares beneficially owned by two
    trusts of which Mr. Cook is trustee, 328,140 shares issuable upon the
    exercise of options exercisable within 60 days of June 30, 1996, 38,004
    shares issuable upon the exercise of warrants held by the Paul and Maria
    Cook Living Trust, dated April 21, 1992, all of which are assumed to have
    been exercised upon the closing of the Initial Public Offering, and 314
    shares issuable upon the exercise of warrants held by Mr. Cook.
 
 (5) Includes 59,658 shares issuable upon the exercise of warrants held by
    Banner Partners, of which 59,238 are assumed to have been exercised upon the
    closing of the Initial Public Offering.
 
 (6) Includes 989,128 shares, 269,192 shares, and 577,540 shares beneficially
    owned by Banner Partners, Banner Partners/Minaret, Carson, a partnership,
    and certain members of Mr. Edwards's family and certain foundations and
    trusts of which Mr. Edwards is a trustee, respectively. Also includes 29,830
    shares, 7,458 shares, and 21,080 shares issuable upon the exercise of
    warrants held by Banner Partners, Banner Partners/Minaret, Carson, and such
    family members, foundations and trusts, respectively, of which an aggregate
    of 58,158 are assumed to have been exercised upon the closing of the Initial
    Public Offering. Mr. Edwards, a director of the Company, may be deemed to be
    a beneficial owner of shares held by such family members, foundations and
    trusts. Mr. Edwards and Alan R. Brudos are the general partners of Banner
    Partners and exercise voting and dispositive power over the shares held by
    Banner Partners.
 
 (7) Includes 136,936 shares issuable upon the exercise of warrants held by
    Acorn, all of which are assumed to have been exercised upon the closing of
    the Initial Public Offering. Rufus W. Lumry is the principal stockholder,
    sole director and President of Acorn, and in such capacities exercises
    voting and dispositive power over the shares held by Acorn.
 
 (8) Includes 252,632 shares issuable upon the exercise of warrants held by AT&T
    Ventures, all of which are assumed to have been exercised upon the closing
    of the Initial Public Offering.
 
 (9) Includes 50,936 shares issuable upon the exercise of warrants held by El
    Dorado, of which 50,682 are assumed to have been exercised upon the closing
    of the Initial Public Offering.
 
                                       69
<PAGE>
(10) Consists of 136,000 shares issuable upon the exercise of options
    exercisable within 60 days of June 30, 1996 held by Mr. Hayes.
 
(11) Includes 122,650 shares issuable upon the exercise of options exercisable
    within 60 days of June 30, 1996 held by Mr. Johnson.
 
(12) Consists of 1,613,476 shares beneficially owned by AT&T Ventures. Mr.
    Douglas, a director of the Company, is a general partner of AT&T Ventures
    and may be deemed to be the beneficial owner of such shares. Mr. Douglas
    disclaims beneficial ownership of the shares except to the extent of his
    proportionate partnership interest therein.
 
(13) Consists of 971,936 shares beneficially owned by Technology Partners West
    Fund IV, L.P. and 26,978 shares issuable upon the exercise of warrants held
    by Technology Partners West Fund IV, L.P., of which 26,838 are assumed to
    have been exercised upon the closing of the Initial Public Offering. Mr.
    Hart, a director of the Company, is a general partner of Technology Partners
    and may be deemed to be the beneficial owner of such shares. Mr. Hart
    disclaims beneficial ownership of the shares except to the extent of his
    proportionate partnership interest therein.
 
(14) Consists of 3,705,952 shares beneficially owned by Odyssey. Mr. Kwait, a
    director of the Company, is a principal of Odyssey and may be deemed to be
    the beneficial owner of such shares. Mr. Kwait disclaims beneficial
    ownership of the shares except to the extent of his proportionate
    partnership interest therein.
 
(15) Consists of 11,250 shares beneficially owned by the Pfund Polakoff Family
    Trust Dated February 18, 1993, 177,890 shares beneficially owned by H&Q
    Group, 1,035,888 shares beneficially owned by H&Q Environmental Technology
    Fund and 44,460 shares beneficially owned by the Hambrecht 1980 Revocable
    Trust. Also consists of 852 shares issuable upon the exercise of warrants
    held by the Pfund Polakoff Family Trust Dated February 18, 1993, 13,918
    shares issuable upon the exercise of warrants held by H&Q Group, 79,472
    shares issuable upon the exercise of warrants held by H&Q Environmental
    Technology Fund and 3,586 shares issuable upon the exercise of warrants held
    by the Hambrecht 1980 Revocable Trust, of which 97,538 shares are assumed to
    have been exercised upon the closing of the Initial Public Offering. Ms.
    Pfund, a director of the Company, is a general partner of the H&Q
    Environmental Technology Fund and an employee of H&Q Group and may be deemed
    to be the beneficial owner of such shares. Ms. Pfund disclaims beneficial
    ownership of the shares held by H&Q Group, H&Q Environmental Technology Fund
    and the Hambrecht 1980 Revocable Trust except to the extent of her
    proportionate interest therein.
 
(16) Consists of 2,162,776 shares beneficially owned by Providence Media
    Partners L.P. ("PMP"). Mr. Salem, a director of the Company, is a limited
    partner of Providence Ventures L.P., the general partner of the general
    partner of PMP, and is a vice president of Providence Ventures Inc., which
    provides investment management services to PMP, and may be deemed to be
    beneficial owner of such shares. Mr. Salem disclaims beneficial ownership of
    the shares except to the extent of his proportionate partnership interest
    therein.
 
(17) Consists of 4,210 shares beneficially owned by Mr. Sargent, 1,552,216
    shares beneficially owned by El Dorado and 132,940 shares beneficially owned
    by Sundance Capital Corporation. Also consists of 842 shares issuable upon
    the exercise of warrants held by Mr. Sargent, 50,936 shares issuable upon
    the exercise of warrants held by El Dorado and 37,162 shares issuable upon
    the exercise of warrants held by Sundance Capital Corporation, of which
    88,686 are assumed to have been exercised upon the closing of the Initial
    Public Offering. Mr. Sargent, a director of the Company, is President of El
    Dorado and a principal of Anderson & Wells Investment Companies, which
    manage Sundance Capital Corporation, and may be deemed to be the beneficial
    owners of such shares. Mr. Sargent disclaims beneficial ownership of the
    shares held by El Dorado and Sundance Capital Corporation.
 
(18) Includes 1,882,674 shares issuable upon the exercise of options and
    warrants exercisable within 60 days of June 30, 1996.
 
                                       70
<PAGE>
                               THE EXCHANGE OFFER
 
PURPOSES OF THE EXCHANGE OFFER
 
    The Old Notes were sold by the Company on June 15, 1995 and November 21,
1995, to Smith Barney Inc. (the "Initial Purchaser"), who subsequently resold
the Old Notes to "qualified institutional buyers" (as defined in Rule 144A under
the Securities Act) and institutional "accredited investors" (within the meaning
of Rule 501(a)(1), (2), (3) or (7) under the Securities Act).  In connection
with the sale of the Old Notes, the Company agreed to use its reasonable best
efforts to cause to become effective within the time periods respectively
specified in the Registration Rights Agreement or earliest to occur of (i) an
initial public offering, (ii) three (3) years after the Issue Date, or (iii) the
consummation of any debt offering after giving effect to which the Company is
subject to the reporting requirements of the Exchange Act, a registration
statement with respect to the Exchange Offer. However, in the event that (i) any
change in applicable law or applicable interpretations of the staff of the
Commission does not permit the Company to effect the Exchange Offer or (ii) if
for any other reason the Exchange Offer is not consummated within 135 days after
November 1, 1996, (iii) any Holder of Old Notes notifies the Company that, for
certain specified reasons, such Holder is precluded from participating in the
Exchange Offer, or (iv) any Holder who participates in the Exchange Offer does
not receive New Notes which can be sold without restriction under Federal and
State securities laws, the Company has agreed to use its reasonable best efforts
to cause to become effective a shelf registration statement (the "Shelf
Registration Statement") with respect to the resale of the Old Notes and to keep
the Shelf Registration Statement effective until June 15, 1998.
 
    The Exchange Offer is being made by CellNet to satisfy its obligations
pursuant to the Registration Rights Agreement. Once the Exchange Offer is
consummated, CellNet will have no further obligation to register any of the Old
Notes not tendered by the Holders for exchange. See "Risk Factors--Consequences
to Non-Tendering Holders of Old Notes." A copy of the Registration Rights
Agreement has been filed as an exhibit to the Registration Statement of which
this Prospectus is a part.
 
    Based on an interpretation by the staff of the Commission set forth in the
Staff's Exxon Capital Holdings Corp. SEC No-Action Letter (available April 13,
1989), Morgan Stanley & Co., Inc. SEC No-Action Letter (available June 5, 1991),
Shearman & Sterling SEC No-Action Letter (available July 7, 1993), and other
no-action letters issued to third parties, the Company believes that New Notes
issued pursuant to the Exchange Offer in exchange for Old Notes may be offered
for resale, resold and otherwise transferred by Holders thereof without
compliance with the registration and prospectus delivery provisions of the
Securities Act. However, any Holder who is an "affiliate" of the Company or who
intends to participate in the Exchange Offer for the purpose of distributing the
New Notes (i) cannot rely on the interpretation by the staff of the Commission
set forth in the above referenced no-action letters, (ii) cannot tender its Old
Notes in the Exchange Offer, and (iii) must comply with the registration and
prospectus delivery requirements of the Securities Act in connection with any
sale or transfer of the Old Notes, unless such sale or transfer is made pursuant
to an exemption from such requirements. See "Risk Factors-- Consequences to
Non-Tendering Holders of Old Notes."
 
    In addition, each broker-dealer that receives New Notes for its own account
in exchange for Old Notes, where such Old Notes were acquired by such
broker-dealer as a result of market making activities or other trading
activities and not acquired directly from the Company, must acknowledge that it
will deliver a prospectus in connection with any resale of such New Notes. See
"Plan of Distribution."
 
    Except as aforesaid, this Prospectus may not be used for an offer to resell,
resale or other transfer of New Notes.
 
                                       71
<PAGE>
TERMS OF THE EXCHANGE OFFER
 
    GENERAL
 
    Upon the terms and subject to the conditions of the Exchange Offer set forth
in this Prospectus and in the Letter of Transmittal, the Company will accept any
and all Old Notes validly tendered and not withdrawn prior to 5:00 p.m., New
York City time, on the Expiration Date. The Company will issue $1,000 principal
amount of New Notes in exchange for each $1,000 principal amount of outstanding
Old Notes accepted in the Exchange Offer. Holders may tender some or all of
their Old Notes pursuant to the Exchange Offer; PROVIDED, that Old Notes may be
tendered only in integral multiples of $1,000.
 
    As of September 30, 1996, there was $325 million of aggregate principal
amount at maturity of the Old Notes outstanding and one registered Holder of Old
Notes. This Prospectus, together with the Letter of Transmittal, is being sent
to such registered Holder as of             , 1996.
 
    In connection with the issuance of the Old Notes, the Company arranged for
the Old Notes to be issued and transferable in book-entry form through the
facilities of DTC, acting as depositary. The New Notes will be issued and
transferable in book-entry form through DTC. See "The Exchange Offer--Book-Entry
Transfer."
 
    The Company shall be deemed to have accepted validly tendered Old Notes
when, as and if the Company has given oral or written notice thereof to the
Exchange Agent. The Exchange Agent will act as agent for the tendering Holders
of Old Notes for the purpose of receiving the New Notes from the Company.
 
    If any tendered Old Notes are not accepted for exchange because of an
invalid tender, the occurrence of certain other events set forth herein or
otherwise, certificates for any such unaccepted Old Notes will be returned,
without expense, to the tendering Holder thereof as promptly as practicable
after the Expiration Date.
 
    Holders of Old Notes who tender in the Exchange Offer will not be required
to pay brokerage commissions or fees or, subject to the instructions in the
Letter of Transmittal, transfer taxes with respect to the exchange of Old Notes
pursuant to the Exchange Offer. The Company will pay the expenses, other than
certain applicable taxes, of the Exchange Offer. See "The Exchange Offer--Fees
and Expenses."
 
    NEITHER THE BOARD OF DIRECTORS OF THE COMPANY NOR THE COMPANY MAKES ANY
RECOMMENDATION TO HOLDERS OF OLD NOTES AS TO WHETHER TO TENDER OR REFRAIN FROM
TENDERING ALL OR ANY PORTION OF THEIR OLD NOTES PURSUANT TO THE EXCHANGE OFFER.
IN ADDITION, NO ONE HAS BEEN AUTHORIZED TO MAKE ANY SUCH RECOMMENDATION. HOLDERS
OF OLD NOTES MUST MAKE THEIR OWN DECISION WHETHER TO TENDER PURSUANT TO THE
EXCHANGE OFFER AND, IF SO, THE AGGREGATE AMOUNT OF OLD NOTES TO TENDER AFTER
READING THIS PROSPECTUS AND THE LETTER OF TRANSMITTAL AND CONSULTING WITH THEIR
ADVISERS, IF ANY, BASED ON THEIR OWN FINANCIAL POSITION AND REQUIREMENTS.
 
    EXPIRATION DATE; EXTENSIONS; AMENDMENTS
 
    The term "Expiration Date" shall mean June 28, 1997, unless the Company in
its sole discretion, extends the Exchange Offer, in which case the term
"Expiration Date" shall mean the latest date to which the Exchange Offer is
extended.
 
    In order to extend the Expiration Date, the Company will notify the Exchange
Agent and the record Holders of Old Notes of any extension by oral or written
notice, each prior to 9:00 a.m., New York City time, on the business day prior
to the previously scheduled expiration date. Such notice may state that the
Company is extending the Exchange Offer for a specified period of time or on a
daily basis until 5:00 p.m., New York City time, on the date on which a
specified percentage of Old Notes are tendered.
 
                                       72
<PAGE>
    The Company reserves the right to delay accepting any Old Notes, to extend
the Exchange Offer, to amend the Exchange Offer or to terminate the Exchange
Offer and not accept Old Notes not previously accepted if any of the conditions
set forth herein under "The Exchange Offer--Conditions" shall have occurred and
shall not have been waived by the Company by giving oral or written notice of
such delay, extension, amendment or termination to the Exchange Agent. Any such
delay in acceptance, extension, amendment or termination will be followed as
promptly as practicable by oral or written notice thereof. If the Exchange Offer
is amended in a manner determined by the Company to constitute a material
change, the Company will promptly disclose such amendment in a manner reasonably
calculated to inform the Holders of such amendment and the Company will extend
the Exchange Offer for a period of five to ten business days, depending upon the
significance of the amendment and the manner of disclosure to Holders of the Old
Notes, if the Exchange Offer would otherwise expire during such five to ten
business day period.
 
    Without limiting the manner in which the Company may choose to make public
announcement of any extension, amendment or termination of the Exchange Offer,
the Company shall have no obligation to publish, advertise, or otherwise
communicate any such public announcement, other than by making a timely release
to the Dow Jones News Service.
 
ACCRETION OF THE NEW NOTES AND THE OLD NOTES; INTEREST
 
    The Old Notes will continue to accrete in principal amount through (but not
including) the date of issuance of the New Notes. From and after the date of
issuance of the New Notes, the New Notes shall accrete at the rate of 13% per
annum, but no cash interest will accrue or be payable in respect of the New
Notes prior to June 15, 2000. Thereafter, the New Notes will bear interest at a
rate equal to 13% per annum. Interest on the New Notes will be payable
semi-annually in arrears on June 15 and December 15 of each year, commencing on
December 15, 2000.
 
PROCEDURES FOR TENDERING
 
    To tender in the Exchange Offer, a Holder must complete, sign and date the
Letter of Transmittal, or a facsimile thereof, have the signatures thereon
guaranteed if required by Instruction 3 of the Letter of Transmittal, and mail
or otherwise deliver such Letter of Transmittal or such facsimile, together with
the Old Notes and any other required documents, to the Exchange Agent prior to
5:00 p.m., New York City time, on the Expiration Date.
 
    The tender by a Holder will constitute an agreement between such Holder and
the Company in accordance with the terms and subject to the conditions set forth
herein and in the Letter of Transmittal.
 
    Delivery of all documents must be made to the Exchange Agent at its address
set forth below. Holders may also request their respective brokers, dealers,
commercial banks, trust companies or nominees to effect the above transactions
for such Holders.
 
    THE METHOD OF DELIVERY OF CERTIFICATES, THE LETTER OF TRANSMITTAL AND ALL
OTHER REQUIRED DOCUMENTS, IS AT THE OPTION AND SOLE RISK OF THE TENDERING
HOLDER, AND DELIVERY WILL BE DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE
EXCHANGE AGENT. IF DELIVERY IS BY MAIL, REGISTERED MAIL, RETURN RECEIPT
REQUESTED, PROPERLY INSURED, OR AN OVERNIGHT DELIVERY SERVICE IS RECOMMENDED. IN
ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO INSURE TIMELY DELIVERY.
 
    Only a Holder of Old Notes may tender such Old Notes in the Exchange Offer.
The term "Holder" with respect to the Exchange Offer means any person in whose
name Old Notes are registered on the books of the Company or any other person
who has obtained a properly completed bond power from the registered Holder.
 
                                       73
<PAGE>
    Any beneficial holder whose Old Notes are registered in the name of its
broker, dealer, commercial bank, trust company or other nominee and who wishes
to tender should contact such registered Holder promptly and instruct such
registered Holder to consent and/or tender on its behalf. If such beneficial
Holder wishes to tender on its own behalf, such beneficial Holder must, prior to
completing and executing the Letter of Transmittal and delivering its Old Notes,
either make appropriate arrangements to register ownership of the Old Notes in
such Holder's name or obtain a properly completed bond power from the registered
Holder. The transfer of record ownership may take considerable time.
 
    Signatures on a Letter of Transmittal or notice of withdrawal, as the case
may be, must be guaranteed by an Eligible Institution (as defined below) unless
the Old Notes tendered pursuant thereto are tendered (i) by a registered Holder
who has not completed the box entitled "Special Payment Instructions" or
"Special Delivery Instructions" on the Letter of Transmittal or (ii) for the
account of an Eligible Institution. In the event that signatures on a Letter of
Transmittal or a notice of withdrawal, as the case may be, are required to be
guaranteed, such guarantee must be by a member firm of a registered national
securities exchange or of the National Association of Securities Dealers, Inc.,
or a commercial bank or trust company having an office or correspondent in the
U.S. (an "Eligible Institution").
 
    If the Letter of Transmittal is signed by a person other than the registered
Holder of any Old Notes listed therein, such Old Notes must be endorsed or
accompanied by appropriate bond powers signed as the name of the registered
Holder or Holders appears on the Old Notes.
 
    If the Letter of Transmittal or any Old Notes or bond powers are signed by
trustees, executors, administrators, guardians, attorneys-in-fact, officers of
corporations or others acting in a fiduciary or representative capacity, such
persons should so indicate when signing and, unless waived by the Company,
evidence satisfactory to the Company of their authority to so act must be
submitted with the Letter of Transmittal.
 
    All questions as to the validity, form, eligibility (including time of
receipt) and acceptance of tendered Old Notes and withdrawal of tendered Old
Notes will be determined by the Company in its sole discretion, which
determination will be final and binding. The Company reserves the absolute right
to reject any and all Old Notes not properly tendered or any Old Notes the
Company's acceptance of which would, in the opinion of counsel for the Company,
be unlawful. The Company also reserves the right to waive any defects,
irregularities or conditions of tender as to particular Old Notes. The Company's
interpretation of the terms and conditions of the Exchange Offer (including the
instructions in the Letter of Transmittal) will be final and binding on all
parties. Unless waived, any defects or irregularities in connection with tenders
of Old Notes must be cured within such time as the Company shall determine.
Neither the Company, the Exchange Agent nor any other person shall be under any
duty to give notification of defects or irregularities with respect to tenders
of Old Notes, nor shall any of them incur any liability for failure to give such
notification. Tenders of Old Notes will not be deemed to have been made until
such irregularities have been cured or waived. Any Old Notes received by the
Exchange Agent that are not properly tendered and as to which the defects or
irregularities have not been cured or waived will be returned by the Exchange
Agent to the tendering Holders of Old Notes, unless otherwise provided in the
Letter of Transmittal, as soon as practicable following the Expiration Date.
 
    In addition, the Company reserves the right in its sole discretion to
purchase or make offers for any Old Notes that remain outstanding subsequent to
the Expiration Date or, as set forth under "The Exchange Offer--Conditions," to
terminate the Exchange Offer and, to the extent permitted by applicable law,
purchase Old Notes in the open market, in privately negotiated transactions or
otherwise. The terms of any such purchases or offers could differ from the terms
of the Exchange Offer.
 
    By tendering, each Holder will represent to the Company that, among other
things, the New Notes acquired pursuant to the Exchange Offer are being obtained
in the ordinary course of such Holder's business, that such Holder has no
arrangement with any person to participate in the distribution of such New
Notes, and that such Holder is not an "affiliate," as defined under Rule 405 of
the Securities Act, of
 
                                       74
<PAGE>
the Company. If the Holder is a broker-dealer that will receive New Notes for
its own account in exchange for Old Notes that were acquired as a result of
market making activities or other trading activities and not acquired directly
from the Company, such Holder by tendering will acknowledge that it will deliver
a prospectus in connection with any resale of such New Notes. See "Plan of
Distribution."
 
BOOK-ENTRY TRANSFER
 
    The Company understands that the Exchange Agent will make a request promptly
after the date of this Prospectus to establish an account with respect to the
Old Notes at DTC for the purpose of facilitating the Exchange Offer, and subject
to the establishment thereof, any financial institution that is a participant in
DTC's system may make book-entry delivery of Old Notes by causing DTC to
transfer such Old Notes into the Exchange Agent's account with respect to the
Old Notes in accordance with DTC's Automated Tender Offer Program ("ATOP")
procedures for such book-entry transfers. Although delivery of the Old Notes may
be effected through book-entry transfer into the Exchange Agent's account at
DTC, the exchange for Old Notes so tendered will only be made after timely
confirmation (a "Book-Entry Confirmation") of such book-entry transfer of the
Old Notes into the Exchange Agent's account, and timely receipt by the Exchange
Agent of an Agent's Message (as defined herein) and any other documents required
by the Letter of Transmittal. The term "Agent's Message" means a message,
transmitted by DTC and received by the Exchange Agent and forming part of the
Book-Entry Confirmation, which states that DTC has received express
acknowledgment from a participant tendering Old Notes that such participant has
received and agrees to be bound by the terms of the Letter of Transmittal, and
that such agreement may be enforced against such participant.
 
GUARANTEED DELIVERY PROCEDURES
 
    Holders who wish to tender their Old Notes and (i) whose Old Notes are not
immediately available, or (ii) who cannot deliver their Old Notes, the Letter of
Transmittal or any other required documents to the Exchange Agent prior to the
Expiration Date, may effect a tender if:
 
        (a) The tender is made through an Eligible Institution;
 
        (b) Prior to the Expiration Date, the Exchange Agent receives from such
    Eligible Institution a properly completed and duly executed Notice of
    Guaranteed Delivery (by facsimile transmission, mail or hand delivery)
    setting forth the name and address of the Holder of the Old Notes, the
    certificate number or numbers of such Old Notes and the principal amount of
    Old Notes tendered, stating that the tender is being made thereby and
    guaranteeing that, within five New York Stock Exchange trading days after
    the Expiration Date, the Letter of Transmittal (or facsimile thereof)
    together with the certificate(s) representing the Old Notes to be tendered
    in proper form for transfer (or a confirmation of a book-entry transfer into
    the Exchange Agent's account at DTC of Old Notes delivered electronically)
    and any other documents required by the Letter of Transmittal will be
    deposited by the Eligible Institution with the Exchange Agent; and
 
        (c) Such properly completed and executed Letter of Transmittal (or
    facsimile thereof), as well as the certificate(s) representing all tendered
    Old Notes in proper form for transfer (or confirmation of a book-entry
    transfer into the Exchange Agent's account at DTC of Old Notes delivered
    electronically) and all other documents required by the Letter of
    Transmittal are received by the Exchange Agent within five New York Stock
    Exchange trading days after the Expiration Date.
 
    Upon request of the Exchange Agent, a Notice of Guaranteed Delivery will be
sent to Holders who wish to tender their Old Notes according to the guaranteed
delivery procedures set forth above.
 
WITHDRAWAL OF TENDERS
 
    Except as otherwise provided herein, tenders of Old Notes may be withdrawn
at any time prior to 5:00 p.m., New York City time, on the Expiration Date. To
withdraw a tender of Old Notes in the Exchange Offer, a written or facsimile
transmission notice of withdrawal must be received by the Exchange Agent at
 
                                       75
<PAGE>
its address set forth herein prior to 5:00 p.m., New York City time, on the
Expiration Date. Any such notice of withdrawal must (i) specify the name of the
person having deposited the Old Notes to be withdrawn (the "Depositor"), (ii)
identify the Old Notes to be withdrawn (including the certificate number or
numbers and principal amount of such Old Notes), (iii) be signed by the Holder
in the same manner as the original signature on the Letter of Transmittal by
which such Old Notes were tendered (including any required signature guarantees)
or be accompanied by documents of transfer sufficient to have the Trustee with
respect to the Old Notes register the transfer of such Old Notes into the name
of the person withdrawing the tender, and (iv) specify the name in which any
such Old Notes are to be registered, if different from that of the Depositor.
All questions as to the validity, form and eligibility (including time of
receipt) of such notices will be determined by the Company, whose determination
shall be final and binding on all parties. Any Old Notes so withdrawn will be
deemed not to have been validly tendered for purposes of the Exchange Offer and
no New Notes will be issued with respect thereto unless the Old Notes so
withdrawn are validly retendered. Any Old Notes which have been tendered but
which are not accepted for payment will be returned to the Holder thereof
without cost to such Holder as soon as practicable after withdrawal, rejection
of tender or termination of the Exchange Offer. Properly withdrawn Old Notes may
be retendered by following one of the procedures, described above under "The
Exchange Offer--Procedures for Tendering" at any time prior to the Expiration
Date.
 
CONDITIONS
 
    Notwithstanding any other term of the Exchange Offer, the Company will not
be required to accept for exchange, or exchange New Notes for, any Old Notes not
theretofore accepted for exchange, and may terminate or amend the Exchange Offer
as provided herein before the acceptance of such Old Notes, if any of the
following conditions exist:
 
        (a) the Exchange Offer, or the making of any exchange by a Holder,
    violates applicable law or any applicable interpretation of the Commission;
 
        (b) any action or proceeding instituted or threatened in any court or by
    or before any governmental agency with respect to the Exchange Offer which,
    in the sole judgment of the Company, might impair the ability of the Company
    to proceed with the Exchange Offer;
 
        (c) there shall have been adopted or enacted any law, statute, rule or
    regulation which, in the sole judgment of the Company, might materially
    impair the ability of the Company to proceed with the Exchange Offer;
 
        (d) a banking moratorium shall have been declared by U.S. federal or
    California or New York state authorities which, in the Company's judgment,
    would reasonably be expected to impair the ability of the Company to proceed
    with the Exchange Offer;
 
        (e) trading on the New York Stock Exchange or generally in the U.S.
    over-the-counter market shall have been suspended by order of the Commission
    or any other governmental authority which, in the Company's judgment, would
    reasonably be expected to impair the ability of the Company to proceed with
    the Exchange Offer; or
 
        (f) a stop order shall have been issued by the Commission or any state
    securities authority suspending the effectiveness of the Registration
    Statement or proceedings shall have been initiated or, to the knowledge of
    the Company, threatened for that purpose.
 
    If any such conditions exist, the Company may (i) refuse to accept any Old
Notes and return all tendered Old Notes to exchanging Holders, (ii) extend the
Exchange Offer and retain all Old Notes tendered prior to the expiration of the
Exchange Offer, subject, however, to the rights of Holders to withdraw such Old
Notes (see "The Exchange Offer--Withdrawal of Tenders") or (iii) waive certain
of such conditions with respect to the Exchange Offer and accept all properly
tendered Old Notes which have not been withdrawn or revoked. If such waiver
constitutes a material change to the Exchange Offer, the
 
                                       76
<PAGE>
Company will promptly disclose such waiver in a manner reasonably calculated to
inform Holders of Old Notes of such waiver.
 
    The foregoing conditions are for the sole benefit of the Company and may be
asserted by the Company regardless of the circumstances giving rise to any such
condition or may be waived by the Company in whole or in part at any time and
from time to time in its sole discretion. The failure by the Company at any time
to exercise any of the foregoing rights shall not be deemed a waiver of any such
right and each such right shall be deemed an ongoing right which may be asserted
at any time and from time to time.
 
    In addition to the foregoing conditions, (i) if, because of any change in
applicable law or applicable interpretations thereof by the Commission, the
Company is not permitted to effect the Exchange Offer or (ii) if for any other
reason the Exchange Offer is not consummated within 135 days of November 1,
1996, or (iii) any Holder of Old Notes notifies the Company that, for certain
specified reasons, such Holder is precluded from participating in the Exchange
Offer or (iv) any Holder who participates in the Exchange Offer does not receive
New Notes which can be sold without restrictions under federal and state
securities laws, then the Company shall file a Shelf Registration Statement and
use its reasonable best efforts to keep the Shelf Registration Statement
effective until June 15, 1998. Thereafter, the Company's obligation to
consummate the Exchange Offer shall be terminated.
 
EXCHANGE AGENT
 
    The Bank of New York has been appointed as Exchange Agent for the Exchange
Offer. Letters of Transmittal and Notices of Guaranteed Delivery should be
directed to the Exchange Agent addressed as follows:
 
<TABLE>
<S>                                <C>
BY REGISTERED OR CERTIFIED MAIL:   BY OVERNIGHT COURIER:
 
Attention: Arwen Gibbons           Attention: Arwen Gibbons
Reorganization Section             Reorganization Section
The Bank of New York               The Bank of New York
101 Barclay Street, 7E             101 Barclay Street, 21st Floor
New York, NY 10286                 New York, NY 10286
 
BY HAND:                           BY FACSIMILE:
 
Attention: Arwen Gibbons           (212) 815-5915
Reorganization Section             Attention: Arwen Gibbons
The Bank of New York               Reorganization Section
101 Barclay Street, 21st Floor
New York, NY 10286                 Confirm by telephone:
                                   (212) 815-5084
</TABLE>
 
FEES AND EXPENSES
 
    The expenses of soliciting tenders will be borne by the Company. The
principal solicitation is being made by mail; however, additional solicitation
may be made by telegraph, telephone or in person by officers and regular
employees of the Company and its affiliates.
 
    The Company will not make any payments to brokers, dealers or others
soliciting acceptances of the Exchange Offer. The Company, however, will pay the
Exchange Agent reasonable and customary fees for its services and will reimburse
it for its reasonable out-of-pocket expenses in connection therewith. The
Company may also pay brokerage houses and other custodians, nominees and
fiduciaries the reasonable out-of-pocket expenses incurred by them in forwarding
copies of this Prospectus and related documents to the beneficial owners of the
Old Notes, and in handling or forwarding tenders for exchange.
 
                                       77
<PAGE>
    The cash expenses to be incurred in connection with the Exchange Offer will
be paid by the Company, are estimated in the aggregate to be approximately
$175,000, and include fees and expenses of the Exchange Agent and the Trustee
under the Indenture and accounting and legal fees.
 
    The Company will pay all transfer taxes, if any, applicable to the exchange
of Old Notes pursuant to the Exchange Offer. If, however, certificates
representing New Notes or Old Notes for principal amounts not tendered or
accepted for exchange are to be delivered to, or are to be registered or issued
in the name of, any person other than the registered Holder of the Old Notes
tendered, or if tendered Old Notes are registered in the name of any person
other than the person signing the Letter of Transmittal, or if a transfer tax is
imposed for any reason other than the exchange of Old Notes pursuant to the
Exchange Offer, then the amount of any such transfer taxes (whether imposed on
the registered holder or any other persons) will be payable by the tendering
Holder. If satisfactory evidence of payment of such taxes or exception therefrom
is not submitted with the Letter of Transmittal, the amount of such transfer
taxes will be billed directly to such tendering Holder.
 
ACCOUNTING TREATMENT
 
    The New Notes will be recorded at the same carrying value as the Old Notes,
which is face value as reflected in the Company's accounting records on the date
of the Exchange Offer. Accordingly, no gain or loss for accounting purposes will
be recognized upon consummation of the Exchange Offer. The issuance costs
incurred in connection with the Exchange Offer will be capitalized and amortized
over the term of the New Notes.
 
                            DESCRIPTION OF OLD NOTES
 
    The Old Notes were issued under an indenture dated as of June 15, 1995, as
supplemented by the First Supplemental Indenture dated as of November 21, 1995
and the Second Supplemental Indenture dated as of August 30, 1996 (as so
supplemented, the "Indenture"), each by and between the Company and The Bank of
New York, as trustee (the "Trustee"). A copy of the form of Indenture is
available from the Company upon request. The following summaries of certain
provisions of the Old Notes and the Indenture do not purport to be complete and
are subject to, and are qualified in their entirety by reference to, all the
provisions of the Old Notes and the Indenture, including the definitions therein
of certain terms which are not otherwise defined in this Prospectus. Wherever
particular provisions or defined terms of the Indenture (or of the form of Old
Note which is a part thereof) are referred to, such provisions or defined terms
are incorporated herein by reference. As used in this "Description of Old
Notes," the "Company" refers to CellNet Data Systems, Inc. and does not, unless
the context otherwise indicates, include its subsidiaries.
 
GENERAL
 
    The Old Notes are unsecured general obligations of the Company and rank
senior in right of payment to all existing and future subordinated debt of the
Company and pari passu in right of payment with all existing and future debt of
the Company but are to be effectively subordinated to all secured indebtedness
of the Company and all indebtedness of subsidiaries of the Company. The Old
Notes are limited to $325,000,000 aggregate principal amount at maturity, were
issued in fully registered form only in denominations of $1,000 or any integral
multiple thereof and were scheduled to mature on June 15, 2005.
 
    Interest on the Old Notes neither accrues nor is payable prior to June 15,
2000. Thereafter, interest would accrue at 13% per annum and would be payable
semi-annually in arrears on each June 15 and December 15, commencing December
15, 2000. Interest would be computed on the basis of a 360-day year composed of
twelve 30-day months.
 
OPTIONAL REDEMPTION BY THE COMPANY
 
    The Indenture provides that Old Notes are not redeemable at the option of
the Company prior to June 15, 2000. At any time on or after that date the Old
Notes could be redeemed at the Company's option
 
                                       78
<PAGE>
on at least 30 but not more than 60 days' notice, in whole at any time or in
part from time to time, at the following respective prices (expressed in
percentages of the principal amount), together with accrued interest through the
date of redemption, during the 12-month period beginning June 15 of the years
indicated:
 
<TABLE>
<CAPTION>
YEAR                                                                     PERCENTAGE
- -----------------------------------------------------------------------  -----------
<S>                                                                      <C>
2000...................................................................    106.500%
2001...................................................................    104.330
2002...................................................................    102.170
2003 and thereafter....................................................    100.000
</TABLE>
 
OPTIONAL REDEMPTION UPON PUBLIC EQUITY OFFERING
 
    The Indenture provides that, in the event that the Company consummates a
Public Equity Offering after which there is a Public Market, the Company may, at
its option, redeem on or prior to June 15, 1998, from the proceeds of such
Public Equity Offering received by the Company, up to 25% of the aggregate
principal amount of the of the Old Notes originally issued at a redemption price
equal to 113% of the Accreted Value thereof plus accrued interest thereon, if
any, to the date of redemption; PROVIDED, HOWEVER, that (1) such redemption may
only be effected to the extent that immediately after such redemption not less
than 75% in aggregate Accreted Value (if prior to June 15, 2000) or principal
amount (if on or after June 15, 2000) of the Old Notes originally issued remain
outstanding (it being expressly agreed that, for purposes of determining whether
this condition is satisfied, Old Notes owned (beneficially or otherwise) by the
Company or any of its Affiliates shall not be deemed to be outstanding) and (2)
such redemption is effected not more than once and not more than 60 days after
the consummation of such Public Equity Offering.
 
REDEMPTION OR REPURCHASE AT THE OPTION OF THE HOLDERS
 
    CHANGE OF CONTROL
 
    The Indenture provides that upon the occurrence of a Change of Control, the
Company is required to offer to repurchase (the "CHANGE OF CONTROL OFFER") all
or a portion of each Holder's Old Notes pursuant to the offer described in
paragraph (b) below, at a purchase price equal to 101% of the Accreted Value
thereof on the date of purchase (if prior to June 15, 2000), or 101% of the
aggregate principal amount thereof plus accrued and unpaid interest, if any, to
the date of repurchase (if on or after June 15, 2000).
 
    In the event of any Change of Control, the Company shall not, and shall not
cause or permit any of its Subsidiaries to purchase, redeem or otherwise acquire
or retire any Indebtedness of the Company ranking junior or subordinate to the
Old Notes pursuant to any analogous provisions relating to such Indebtedness
until after the 91st day after the Change of Control Payment Date (as such date
may be extended).
 
    On or before the Change of Control Payment Date, the Company shall (i)
accept for payment Old Notes or portions thereof tendered pursuant to the Change
of Control Offer, (ii) deposit with the paying agent in accordance with the
Indenture U.S. legal tender sufficient to pay the purchase price plus accrued
interest, if any, of all Old Notes so tendered, and (iii) deliver to the Trustee
Old Notes so accepted together with an Officers' Certificate identifying the Old
Notes or portions thereof being purchased by the Company.
 
    Any amounts remaining after the purchase of Old Notes pursuant to a Change
of Control Offer shall be returned by the Trustee to the Company.
 
    The definition of "Change of Control" includes a disposition of all or
substantially all of the property and assets of the Company. With respect to the
disposition of property or assets, the phrase "all or substantially all" as used
in the Indenture (including as set forth under "The Exchange Offer--Certain
Covenants--Merger, Consolidation and Sale of Assets" below) varies according to
the facts and circumstances of the subject transaction, has no clearly
established meaning under New York law (which is the
 
                                       79
<PAGE>
choice of law under the Indenture) and is subject to judicial interpretation.
Accordingly, in certain circumstances there may be a degree of uncertainty in
ascertaining whether a particular transaction would involve a disposition of
"all or substantially all" of the property or assets of a Person, and therefore
it may be unclear as to whether a Change of Control has occurred and whether the
Company is required to make a Change of Control Offer.
 
    None of the provisions relating to a repurchase upon a Change of Control are
waivable by the Board of Directors of the Company. The Company could, in the
future, enter into certain transactions, including certain recapitalizations of
the Company, that would not constitute a Change of Control with respect to the
Change of Control repurchase feature of the Old Notes, but would increase the
amount of Indebtedness outstanding at such time. If a Change of Control were to
occur, there can be no assurance that the Company would have sufficient funds to
pay the repurchase price for all Old Notes that the Company is required to
repurchase. In the event that the Company were required to repurchase
outstanding Old Notes pursuant to a Change of Control Offer, the Company expects
that it would need to seek third-party financing to the extent it does not have
available funds to meet its repurchase obligations. However, there can be no
assurance that the Company would be able to obtain such financing.
 
    If an offer is made to repurchase the Old Notes pursuant to a Change of
Control Offer, the Company will and will cause its Subsidiaries to comply with
all tender offer rules under state and Federal securities laws, including, but
not limited to, Section 14(e) under the Exchange Act and Rule 14e-1 thereunder,
to the extent applicable to such offer. To the extent that the provisions of any
securities laws or regulations conflict with the "Change of Control" provisions
of the Indenture, the Company shall comply with the applicable securities laws
and regulations and shall not be deemed to have breached its obligations under
the "Change of Control" provisions of the Indenture by virtue thereof.
 
    LIMITATION ON ASSET SALES
 
    The Indenture provides that the Company shall not, and shall not cause or
permit any Restricted Subsidiary to, directly or indirectly, consummate an Asset
Sale unless (i) the Company or the applicable Restricted Subsidiary, as the case
may be, receives consideration at the time of such Asset Sale at least equal to
the fair market value of the assets sold or otherwise disposed of (as determined
in good faith by the Company's Board of Directors) and (ii) at least 85% of the
consideration received by the Company or such Restricted Subsidiary, as the case
may be, from such Asset Sale shall be cash or Cash Equivalents and shall be
received at the time of the consummation of any such Asset Sale; PROVIDED,
HOWEVER, that the amount of (x) any liabilities as shown on the Company's most
recent balance sheet or in the Old Notes thereto) of the Company or any
Restricted Subsidiary (other than (i) Indebtedness subordinate in right of
payment to the Old Notes, (ii) contingent liabilities, (iii) liabilities or
Indebtedness to Affiliates of the Company and (iv) non-recourse Indebtedness and
other non-recourse liabilities that are assumed by the transferee of any such
assets) and (y) to the extent of the cash received, any Old Notes or other
obligations received by the Company or any such Restricted Subsidiary from such
transferee that are converted by the Company or such Restricted Subsidiary into
cash within 60 days of receipt, shall be deemed to be cash for purposes of this
provision; PROVIDED, FURTHER, HOWEVER, that the 85% limitation referred to above
shall not apply to any sale, transfer or other disposition of assets in which
the cash portion of the consideration received therefor, determined in
accordance with the foregoing provision, is equal to or greater than what the
after-tax net proceeds would have been had such transaction complied with the
aforementioned 85% limitation. Upon the consummation of an Asset Sale, the
Company shall apply, or cause such Restricted Subsidiary to apply, the Net Cash
Proceeds relating to such Asset Sale within 360 days of receipt thereof either
(A) to reinvest in Productive Assets, or (B) to prepay or repay Indebtedness of
the Company which ranks PARI PASSU with the Old Notes or to prepay or repay any
Indebtedness of a Restricted Subsidiary of the Company (other than non-recourse
Indebtedness) in an amount not to exceed the product of (A) the amount of such
Net Cash Proceeds and (B) fraction, the numerator of which is the total
aggregate principal amount of such PARI PASSU Indebtedness or such Indebtedness
of Restricted Subsidiaries and the denominator of which is the aggregate of all
such Indebtedness plus the Accreted Value of the Old Notes
 
                                       80
<PAGE>
(if the Net Proceeds Offer Payment Date is prior to June 15, 2000), or the
aggregate principal amount of the Old Notes then outstanding (if the Net
Proceeds Offer Payment Date is on or after June 15, 2000). On the 361st day
after an Asset Sale or such earlier date, if any, as the Board of Directors of
the Company or of such Subsidiary determines not to apply the Net Cash Proceeds
relating to such Asset Sale as set forth in clauses (A) and (B) of the preceding
sentence (each a "NET PROCEEDS OFFER TRIGGER DATE"), such aggregate amount of
Net Cash Proceeds which have not been applied on or before such Net Proceeds
Offer Trigger Date as permitted in clauses (A) and (B) of the preceding sentence
(each a "NET PROCEEDS OFFER AMOUNT"), shall be applied by the Company or such
Subsidiary to make an offer to purchase (the "NET PROCEEDS OFFER") on a date
(the "NET PROCEEDS OFFER PAYMENT DATE") not less than 30 nor more than 60 days
following the applicable Net Proceeds Offer Trigger Date, from all Holders on a
PRO RATA basis that amount of Old Notes equal to the Net Proceeds Offer Amount
at a price in cash equal to 100% of the Accreted Value of the Old Notes on the
Net Proceeds Offer Payment Date (if prior to June 15, 2000) or 100% of the
principal amount of the Old Notes (if the Net Proceeds Offer Payment Date is on
or after June 15, 2000) to be purchased, plus accrued and unpaid interest
thereon, if any, to the date of purchase; PROVIDED, HOWEVER, that if at any time
any non-cash consideration received by the Company or any Subsidiary of the
Company, as the case may be, in connection with any Asset Sale is converted into
or sold or otherwise disposed of for cash, then such conversion or disposition
shall be deemed to constitute an Asset Sale hereunder and the Net Cash Proceeds
thereof shall be applied in accordance with this covenant. To the extent that
the Accreted Value of Old Notes on the Net Proceeds Offer Payment Date (if prior
to June 15, 2000) or the aggregate principal amount of Old Notes (if the Net
Proceeds Offer Payment Date is on or after June 15, 2000) tendered pursuant to
the Net Proceeds Offer is less than the Net Proceeds Offer Amount, the Company
may use any remaining proceeds of such Asset Sale for general corporate purposes
(but subject to the terms of the Indenture). Upon completion of a Net Proceeds
Offer, the Net Proceeds Offer Amount relating to such Net Proceeds Offer shall
be deemed to be zero for purposes of any subsequent Asset Sale.
 
    Notwithstanding the foregoing, if a Net Proceeds Offer Amount is less than
$5,000,000, the application of the Net Cash Proceeds constituting such Net
Proceeds Offer Amount to a Net Proceeds Offer may be deferred until such time as
such Net Proceeds Offer Amount plus the aggregate amount of all Net Proceeds
Offer Amounts arising subsequent to the Issue Date of the Old Notes from all
Asset Sales by the Company and its Subsidiaries in respect of which a Net
Proceeds Offer has not been made aggregates at least $5,000,000, at which time
the Company or such Restricted Subsidiary shall apply all Net Cash Proceeds
constituting all Net Proceeds Offer Amounts that have been so deferred to make a
Net Proceeds Offer (each date on which the aggregate of all such deferred Net
Proceeds Offer Amounts is equal to $5,000,000 or more shall be deemed to be a
Net Proceeds Offer Trigger Date).
 
    In connection with any Asset Sale with respect to assets having a book value
in excess of $5,000,000 or as to which it is expected that the aggregate
consideration therefor to be received by the Company or any Restricted
Subsidiary will exceed $5,000,000 in value, such transaction or series of
transactions shall be approved, prior to the consummation thereof, by the Board
of Directors of the Company.
 
    In the event of the transfer of substantially all (but not all) of the
property and assets of the Company and its Subsidiaries as an entirety to a
Person in a transaction permitted under "The Exchange Offer-- Certain
Covenants--Merger, Consolidation, and Sale of Assets" the successor corporation
shall be deemed to have sold the properties and assets of the Company and its
Subsidiaries not so transferred for purposes of this covenant, and shall comply
with the provisions of this covenant with respect to such deemed sale as if it
were an Asset Sale; PROVIDED, HOWEVER, that to the extent that the Company is
required to make an offer to repurchase the Old Notes pursuant to "Description
of Old Notes--Redemption or Repurchase at the Option of the Holders--Change in
Control", in connection with any transaction that would otherwise be within the
terms of this paragraph, the Company need not comply with the provisions of this
paragraph. In addition, the fair market value of such properties and assets of
the Company or its Subsidiaries deemed to be sold shall be deemed to be Net Cash
Proceeds for purposes of this covenant.
 
                                       81
<PAGE>
    The Company shall and shall cause its Subsidiaries to comply with all tender
offer rules under state and Federal securities laws, including, but not limited
to, Section 14(e) under the Exchange Act and Rule 14e-1 thereunder, to the
extent applicable to such offer. To the extent that the provisions of any
securities laws or regulations conflict with the foregoing provisions of the
Indenture, the Company shall comply with the applicable securities laws and
regulations and shall not be deemed to have breached its obligations under the
foregoing provisions of the Indenture by virtue thereof.
 
SELECTION AND NOTICE
 
    If less than all of the Old Notes are to be redeemed at any time, selection
of Old Notes for redemption will be made by the Trustee in compliance with the
requirements of the principal national securities exchange, if any, on which the
Old Notes are listed or, if the Old Notes are not so listed, by lot or by such
other method as the Trustee deems fair and appropriate; PROVIDED, that no Old
Notes with a principal amount of $1,000 or less shall be redeemed in part.
Notice of redemption shall be mailed by first class mail at least 30 but not
more than 60 days before the redemption date to each Holder of Old Notes to be
redeemed at its registered address. If any Old Note is to be redeemed in part
only, the notice of redemption that relates to such Old Note shall state the
portion of the principal amount thereof to be redeemed. An Old Note in principal
amount equal to the unredeemed portion thereof will be issued in the name of the
holder thereof upon cancellation of the original Old Note. On and after the
redemption date, interest will cease to accrue on Old Notes or portions thereof
called for redemption.
 
CERTAIN COVENANTS
 
    LIMITATION ON RESTRICTED PAYMENTS
 
    (a) The Indenture provides that, the Company shall not, and shall not cause
or permit any Restricted Subsidiary to, directly or indirectly, (i) declare or
pay any dividend or make any distribution (other than dividends or distributions
payable solely in Qualified Capital Stock of the Company) on shares of the
Company's Capital Stock to holders of such Capital Stock, (ii) purchase, redeem
or otherwise acquire or retire for value any Capital Stock of the Company or of
any direct or indirect parent or Affiliate of the Company, or any warrants,
rights or options to acquire shares of any class of such Capital Stock, other
than any such Capital Stock owned by the Company or by a Qualified Restricted
Subsidiary, (iii) make any principal payment on, or purchase, defease, redeem,
prepay, decrease or otherwise acquire or retire for value, prior to any
scheduled final maturity, scheduled repayment or scheduled sinking fund payment,
any Indebtedness of the Company that is subordinate or junior in right of
payment to the Old Notes (other than any such Indebtedness owing to a Qualified
Restricted Subsidiary to the extent such Indebtedness is not subject to any Lien
held by any Person other than the Company or a Qualified Restricted Subsidiary),
or (iv) make any Investment (other than Permitted Investments) (each of the
foregoing prohibited actions set forth in clauses (i), (ii), (iii) and (iv)
being referred to as a "RESTRICTED PAYMENT"), if at the time of such proposed
Restricted Payment or immediately after giving effect thereto, (I) a Default or
an Event of Default has occurred and is continuing or would result therefrom, or
(II) the Company is not, or would not be, able to Incur at least $1.00 of
additional Indebtedness under the Debt to Cash Flow Ratio test of paragraph (b)
of the section of the Indenture described under the heading "The Exchange
Offer--Certain Covenants--Limitation on Indebtedness and Preferred Stock" below,
or (III) the aggregate amount of Restricted Payments (including such proposed
Restricted Payment) made subsequent to the Issue Date (the amount expended for
such purposes, if other than in cash, being the fair market value of such
property as determined reasonably and in good faith by the Board of Directors of
the Company) exceeds or would exceed the sum of:
 
        (1) 50% of the cumulative Consolidated Net Income (or if cumulative
    Consolidated Net Income shall be a loss, minus 100% of such loss) of the
    Company during the period (treating such period as a single accounting
    period) beginning on the first day subsequent to the Issue Date and ending
    on the last day of the most recent fiscal quarter of the Company ending
    immediately prior to the date of the
 
                                       82
<PAGE>
    making of such Restricted Payment for which financial statements are
    available ending not more than 135 days prior to the date of determination,
    PLUS
 
        (2) 100% of the aggregate net proceeds received by the Company from any
    Person (other than from a Subsidiary of the Company) from the issuance and
    sale of Qualified Capital Stock of the Company subsequent to the Issue Date
    and on or prior to the date of the making of such Restricted Payment
    (excluding (A) any Qualified Capital Stock of the Company paid as a dividend
    on any Capital Stock of the Company or of any of its Subsidiaries and (B)
    any Qualified Capital Stock of the Company with respect to which the
    purchase price thereof has been financed directly or indirectly using funds
    (x) borrowed from the Company or from any of its Subsidiaries, unless and
    until and to the extent such borrowing is repaid, or (y) contributed,
    extended, guaranteed or advanced by the Company or by any of its
    Subsidiaries (including, without limitation, in respect of any employee
    stock ownership or benefit plan)), PLUS
 
        (3) an amount equal to the net reduction in Investments in Unrestricted
    Subsidiaries resulting from dividends, repayments of loans or advances, or
    other transfers of (including the fair market value of non-cash property
    transferred), in each case to the Company or to any Qualified Restricted
    Subsidiary from Unrestricted Subsidiaries (but without duplication of any
    such amount included in calculating Consolidated Net Income of the Company),
    or from redesignations of Unrestricted Subsidiaries as Restricted
    Subsidiaries (in each case valued as provided in "The Exchange Offer--
    Certain Covenants--Limitation on Designation of Restricted and Unrestricted
    Subsidiaries" below), not to exceed, in the case of any Unrestricted
    Subsidiary, the amount of Investments previously made by the Company, or any
    Restricted Subsidiary in such Unrestricted Subsidiary and which was treated
    as a Restricted Payment hereunder, PLUS
 
        (4) 100% of the aggregate cash received by the Company subsequent to the
    Issue Date and on or prior to the date of the making of such Restricted
    Payment upon the exercise of options or warrants (whether issued prior to or
    after the Issue Date) to purchase Qualified Capital Stock of the Company,
    PLUS
 
        (5) without duplication of any amount included pursuant to clause (3)
    above, an amount equal to the lesser of the cost or net cash proceeds
    received by the Company upon the sale or other disposition of any Investment
    made after the Issue Date which had been treated as a Restricted Payment
    (but without duplication of any amount included in calculating Consolidated
    Net Income of the Company).
 
    (b) Notwithstanding the foregoing, the Indenture provides that the
provisions set forth in the immediately preceding paragraph shall not prohibit:
 
        (1) the payment of any dividend or the making of any distribution within
    60 days after the date of declaration of such dividend or distribution if
    the making thereof would have been permitted on the date of declaration;
    PROVIDED, HOWEVER, that such dividend shall be deemed to have been made as
    of its date of declaration or the giving of such notice for purposes of this
    clause (1);
 
        (2) the acquisition of Capital Stock of the Company or warrants, rights
    or options to acquire Capital Stock of the Company either (i) solely in
    exchange for shares of Qualified Capital Stock of the Company or warrants,
    rights or options to acquire Qualified Capital Stock of the Company, or (ii)
    through the application of net proceeds of a substantially concurrent sale
    for cash (other than to a Subsidiary of the Company) of shares of Qualified
    Capital Stock of the Company or warrants, rights or options to acquire
    Qualified Capital Stock of the Company; PROVIDED, HOWEVER, that no Default
    or Event of Default shall have occurred and be continuing at the time of
    such Restricted Payment pursuant to this clause (2) and would not result
    therefrom;
 
        (3) the acquisition of Indebtedness of the Company that is subordinate
    or junior in right of payment to the Old Notes either (i) solely in exchange
    for shares of Qualified Capital Stock of the Company or for Refinancing
    Indebtedness, or (ii) through the application of net proceeds of a
 
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    substantially concurrent sale for cash (other than to a Subsidiary of the
    Company) of (A) shares of Qualified Capital Stock of the Company or
    warrants, rights or options to acquire Qualified Capital Stock of the
    Company or (B) Refinancing Indebtedness; PROVIDED, HOWEVER, that no Default
    or Event of Default shall have occurred and be continuing at the time of
    such Restricted Payment pursuant to this clause (3) and would not result
    therefrom;
 
        (4) the repurchase, redemption, retirement or defeasance of Preferred
    Stock issued in accordance with clause (xi) of the definition of Permitted
    Indebtedness by the issuer thereof if and to the extent required by the
    terms of such Preferred Stock;
 
        (5) Permitted Stock Repurchases by the Company; PROVIDED, HOWEVER, that
    the aggregate amount expended for all such Permitted Stock Repurchases by
    the Company shall not exceed $1,000,000 in any fiscal year; PROVIDED,
    FURTHER, HOWEVER, that no Default or Event of Default shall have occurred
    and be continuing at the time of such Restricted Payment pursuant to this
    clause (5) and would not result therefrom; and
 
        (6) the payment of any amounts in respect of Capital Stock of any Person
    organized as a partnership, limited liability company, or similar entity, to
    the extent (A) of capital contributions made to such Person by holders of
    its Capital Stock other than the Company or any Restricted Subsidiary and
    (B) necessary to permit the holders of such Capital Stock to pay taxes in
    respect thereof; PROVIDED, HOWEVER, that no Default or Event of Default
    shall have occurred and be continuing at the time of any Restricted Payment
    made pursuant to clause (A) of this subsection (6) or would result
    therefrom.
 
    (c) The Indenture provides that, in determining the aggregate amount of
Restricted Payments made subsequent to the Issue Date, amounts expended pursuant
to clauses (1), (2), (3) (other than with respect to Refinancing Indebtedness),
and (5) of paragraph (b) of this covenant shall, in each case, be included in
such calculation and, if such Restricted Payment is a Restricted Payment
described in clauses (i) or (ii), then in addition, in determining the aggregate
amount of Restricted Payments made since the Issue Date, amounts expended as
aforesaid, PLUS amounts expended pursuant to clauses (i) and (j) of the
definition of Permitted Investments shall, in each case, be included in such
calculation.
 
    (d) The Indenture provides that, not later than the date of making any
Restricted Payment in excess of $2,000,000 individually or in the aggregate with
all other Restricted Payments made since the previous certification the Company
shall deliver to the Trustee an Officers' Certificate stating that such
Restricted Payment complies with this Indenture and setting forth in reasonable
detail the basis upon which the required calculations were computed (upon which
the Trustee may conclusively rely without any investigation whatsoever), which
calculations may be based upon the Company's latest available internal quarterly
financial statements.
 
    LIMITATION ON INDEBTEDNESS AND PREFERRED STOCK
 
    (a) The Indenture provides that the Company shall not, and shall not cause
or permit any of its Restricted Subsidiaries to, directly or indirectly, Incur
any Indebtedness, including, without limitation, any Acquired Indebtedness, or
issue any Preferred Stock.
 
    (b) Notwithstanding the foregoing limitations, the Indenture provides that:
 
        (I) the Company may (A) issue Qualified Capital Stock and (B) Incur (1)
    Permitted Indebtedness, (2) Indebtedness (including, without limitation,
    Acquired Indebtedness) if, in the case of this subclause (I)(B)(2), (i) no
    Default or Event of Default shall have occurred and be continuing on the
    date of the proposed Incurrence thereof or would result as a consequence of
    such proposed Incurrence and (ii) immediately after giving pro forma effect
    to such proposed Incurrence and the receipt and application of the net
    proceeds therefrom, the Company's Debt to Cash Flow Ratio would not exceed
    7.0 to 1.0, and (3) Refinancing Indebtedness Incurred to Refinance any such
    Indebtedness Incurred pursuant to clause (I)(B)(2); and
 
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       (II) the Restricted Subsidiaries may Incur Indebtedness pursuant to
    clauses (iii), (iv), (v), (vi), (vii), (viii), (ix), (x), (xi) and (xii) of
    the definition of Permitted Indebtedness; PROVIDED, HOWEVER, that, other
    than as provided in clause (xi) of the definition of Permitted Indebtedness,
    such Indebtedness shall not be Incurred pursuant to any assumption or
    guarantee by any Restricted Subsidiary in respect of any other Restricted
    Subsidiary's or the Company's Indebtedness.
 
    (c) The Indenture provides that any Indebtedness of an entity existing at
the time it becomes a Restricted Subsidiary (whether by merger, consolidation,
acquisition of capital stock or otherwise) shall be deemed to be Incurred as of
the date such entity becomes a Restricted Subsidiary.
 
    (d) The Indenture provides that the Company shall not, directly or
indirectly, in any event Incur any Indebtedness which by its terms (or by the
terms of any agreement governing such Indebtedness) is subordinated to any other
Indebtedness of the Company unless such Indebtedness is also by its terms (or by
the terms of any agreement governing such Indebtedness) made expressly
subordinated to the Old Notes to the same extent and in the same manner as such
Indebtedness is subordinated to such other Indebtedness of the Company.
 
    (e) The Indenture provides that the Company shall not, and shall not permit
any Restricted Subsidiary to directly or indirectly, incur any Indebtedness
which provides that the holder thereof may (upon notice, lapse of time or both)
declare a default thereon or cause the payment thereof to be accelerated or
payable prior to its final scheduled maturity upon the occurrence of a default
with respect to any Indebtedness of any Unrestricted Subsidiary including any
right to take enforcement action against such Unrestricted Subsidiary).
 
    LIMITATION ON CONSOLIDATION, MERGER, ETC. OF RESTRICTED SUBSIDIARIES
 
    The Indenture provides that the Company shall not, directly or indirectly,
cause or permit any Restricted Subsidiary, directly of indirectly, to merge or
consolidate with or into, or sell, assign, transfer, lease or otherwise dispose
of all or substantially all of such Subsidiary's assets to, any other Restricted
Subsidiary unless, at the time of such merger or consolidation or sale,
assignment, transfer, lease or other disposition (and immediately after giving
effect thereto), (1) the Debt to Cash Flow Ratio of the Company is less than or
equal to 6.0 to 1.0 or (2) the resulting, surviving or transferee Restricted
Subsidiary is a Qualified Restricted Subsidiary or (3) the resulting, surviving
or transferee Restricted Subsidiary is a Restricted Subsidiary that is not a
Qualified Restricted Subsidiary and the total contribution to the Consolidated
EBITDA of the Company (such Consolidated EBITDA to be calculated for purposes of
this covenant without giving effect to clause (f) of the definition of
Consolidated Net Income) for the most recently ended fiscal quarter for which
financial information is available ending not more than 135 days prior to the
date of determination of such resulting, surviving or transferee Restricted
Subsidiary is not in excess of 25% of such Consolidated EBITDA. In addition, all
transactions permitted pursuant to this covenant would be required to comply
with the provisions described below under the heading "The Exchange
Offer--Certain Covenants--Merger, Consolidation and Sale of Assets".
 
    LIMITATION ON LIENS
 
    The Indenture provides that the Company shall not, and shall not cause or
permit any Restricted Subsidiary to, directly or indirectly, create, incur,
assume or permit or suffer to exist or remain in effect any Liens upon any
properties or assets of the Company or of any Restricted Subsidiary whether
owned on the Issue Date or acquired after the Issue Date, or on any income or
profits therefrom, or assign or otherwise convey any right to receive income or
profits thereon, other than (A) Liens granted by the Company on property or
assets of the Company securing Indebtedness of the Company that is permitted by
the covenant under the heading "The Exchange Offer--Certain
Covenants--Limitation on Indebtedness and Preferred Stock"; PROVIDED, HOWEVER,
that the Company makes or causes to be made effective provision whereby the Old
Notes will be secured equally and ratably with (or, in the case of any
Indebtedness that is
 
                                       85
<PAGE>
subordinate or junior to the Old Notes, prior to) such Liens, (B) Permitted
Liens and (C) Cash Equivalents pursuant to clause (vi) of the definition thereof
to the extent the operation of this covenant with respect to such Investments
would cause a violation of the margin rules of the Board of Governors of the
Federal Reserve System.
 
    LIMITATION ON TRANSACTIONS WITH AFFILIATES
 
    The Indenture provides that the Company shall not, and shall not cause or
permit any Restricted Subsidiary to, directly or indirectly, enter into or
permit or suffer to exist any transaction or series of related transactions
(including, without limitation, the purchase, sale, lease or exchange of any
property or the rendering of any service) with or for the benefit of any of its
Affiliates (an "AFFILIATE TRANSACTION"), other than any Affiliate Transaction
that is on terms that are fair and reasonable and no less favorable to the
Company or such Restricted Subsidiary than those that might reasonably have been
obtained at such time in a comparable transaction or series of related
transactions on an arms-length basis from a Person that is not such an
Affiliate; PROVIDED, HOWEVER, that for any Affiliate Transaction involving value
of $10,000,000 or more, a majority of the disinterested members of the Board of
Directors of the Company (and of such Restricted Subsidiary, as the case may be)
shall, prior to the consummation of such Affiliate Transaction, have reasonably
and in good faith determined, as evidenced by a Board Resolution, that such
Affiliate Transaction meets the requirements of the foregoing clause; PROVIDED,
FURTHER, HOWEVER, that for any Affiliate Transaction involving value of
$25,000,000 or more, the Board of Directors of the Company (and of such
Restricted Subsidiary, as the case may be) shall have received, prior to the
consummation thereof, a written opinion from an Independent Financial Advisor
that such Affiliate Transaction is on terms that are fair to the Company from a
financial point of view. The foregoing restrictions will not apply to (1)
reasonable fees and compensation paid to, and indemnity provided on behalf of,
officers, directors, employees or consultants of the Company or any Restricted
Subsidiary as determined in good faith by the Company's Board of Directors or
senior management, (2) any transaction solely between or among the Company and a
Wholly Owned Restricted Subsidiary of the Company or Wholly Owned Restricted
Subsidiaries of the Company to the extent any such transaction is otherwise in
compliance with, or not prohibited by, the Indenture, (3) any transaction solely
between or among Wholly Owned Restricted Subsidiaries of the Company to the
extent that any such transaction is otherwise in compliance with, or not
prohibited by, the Indenture, (4) any transaction otherwise permitted by the
terms of the section of the Indenture described above under the heading
"--Limitation on Restricted Payments," (5) the execution and delivery of or
payments made under the Tax Sharing Agreement or in any amendment thereto or any
replacement agreement thereof; PROVIDED, HOWEVER, that such amendment or
replacement is not more disadvantageous to the holders or the Company in any
material respect than such agreement in the form attached to the Indenture, (6)
the licensing or sublicensing of use of any FCC License or intellectual property
by the Company or any Restricted Subsidiary to any Subsidiary of the Company,
(7) the transfer or assignment of hardware or equipment by the Company or any
Restricted Subsidiary to any Subsidiary of the Company; PROVIDED, HOWEVER, that
the Company and its Restricted Subsidiaries continue to be able to have access,
on terms that are fair and reasonable, to such hardware and equipment to the
extent necessary for the conduct of their respective business, (8) arrangements
between the Company or any of its Restricted Subsidiaries and any Subsidiary of
the Company for the purposes of providing services of employees to such
Subsidiaries, (9) any transaction or series of related transactions between the
Company or any Wholly Owned Restricted Subsidiary on the one hand and any
Restricted Subsidiary on the other to the extent fair and reasonable to the
Company or such Wholly Owned Restricted Subsidiary and to the extent on terms
providing for fair value or reasonably equivalent value to the Company or such
Wholly Owned Restricted Subsidiary and (10) the sale, conveyance, transfer,
lease, assignment or other disposition to any Restricted Subsidiary of contracts
in respect of Qualified Projects entered into by the Company (not previously
entered into by any Restricted Subsidiary).
 
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<PAGE>
    LIMITATION ON DIVIDEND AND OTHER PAYMENT RESTRICTIONS AFFECTING RESTRICTED
     SUBSIDIARIES
 
    The Indenture provides that the Company shall not, and shall not cause or
permit any Restricted Subsidiary to, directly or indirectly, create or otherwise
cause or permit or suffer to exist or become effective any encumbrance or
restriction on the ability of any Restricted Subsidiary to (a) pay dividends or
make any other distributions on its Capital Stock; (b) make loans or advances or
pay any Indebtedness or other obligation owed to the Company or to any
Restricted Subsidiary; (c) transfer any of its property or assets to the Company
or to any Restricted Subsidiary; or (d) guarantee any Indebtedness or any other
obligation of the Company or any Subsidiary of the Company (each such
encumbrance or restriction in clause (a), (b), (c) or (d) a "PAYMENT
RESTRICTION"), except for such encumbrances or restrictions existing under or by
reason of: (1) applicable law; (2) the Indenture; (3) customary non-assignment
provisions of any contract or lease of any Restricted Subsidiary entered into in
the ordinary course of business of such Restricted Subsidiary; (4) any
instrument governing Acquired Indebtedness Incurred in accordance with the
Indenture; PROVIDED, HOWEVER, that such encumbrance or restriction is not, and
will not be, applicable to any Person, or the properties or assets of any
Person, other than the Person or the property or asset so acquired; (5)
agreements existing on the Issue Date to the extent and in the manner such
agreements are in effect on the Issue Date or in any amendment thereto or any
replacement agreement thereof; PROVIDED, HOWEVER, that such amendment or
replacement is not more disadvantageous to the Holders or the Company in any
material respect than any such agreement as in effect on the Issue Date; (6)
restrictions imposed by Permitted Liens solely to the extent such Liens encumber
the transfer or other disposition of the assets subject to such Liens; (7) any
restriction or encumbrance contained in contracts for the sale of assets to be
consummated in accordance with the Indenture solely in respect of the assets to
be sold pursuant to such contract; (8) Indebtedness or Preferred Stock Incurred
or issued pursuant to clauses (x) and (xi) of the definition of Permitted
Indebtedness; or (9) any encumbrance or restriction contained in Refinancing
Indebtedness Incurred to Refinance the Indebtedness Incurred pursuant to an
agreement referred to in clauses (2), (4), (5) or (8) above; provided, however,
that the provisions relating to such encumbrance or restriction contained in any
such Refinancing Indebtedness are no less favorable to the Company in any
material respect in the good faith judgment of the Board of Directors of the
Company than the provisions relating to such encumbrance or restriction
contained in agreements referred to in such clause (2), (4), (5) or (8).
 
    LIMITATION ON DESIGNATION OF RESTRICTED AND UNRESTRICTED SUBSIDIARIES
 
    The Indenture provides as follows:
 
    (a) The Board of Directors of the Company may designate any Unrestricted
Subsidiary to be a Restricted Subsidiary or any Restricted Subsidiary to be an
Unrestricted Subsidiary; PROVIDED, HOWEVER, that (i) immediately after giving
effect to such designation (treating such designation as an Incurrence of the
outstanding Indebtedness of any such Unrestricted Subsidiary), the Company could
incur $1.00 of additional Indebtedness pursuant to subclause (I)(B)(2) of
paragraph (b) of "The Exchange Offer-- Certain Covenants--Limitation on
Indebtedness and Preferred stock" above, (ii) no Default or Event of Default
shall have occurred and be continuing or would arise therefrom and (iii) in the
case of designation of a Restricted Subsidiary to be an Unrestricted Subsidiary,
such designation is at that time permitted under the provisions described in the
section headed "The Exchange Offer--Certain Covenants-- Limitation on Restricted
Payments" above. The Company shall deliver to the Trustee a certified copy of
the Board Resolution of its Board of Directors giving effect to such designation
and an Officers' Certificate certifying that such designation complied with the
foregoing conditions and setting forth in reasonable detail the underlying
calculations. The Board of Directors of the Company may not change the
designation of a Subsidiary of the Company more than twice in any period of five
years.
 
    (b) For purposes of determining compliance with the covenant "The Exchange
Offer--Certain Covenants--Limitation on Restricted Payments" described above,
(i) an Investment shall be deemed to have been made at the time any Restricted
Subsidiary is designated as an Unrestricted Subsidiary in an
 
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<PAGE>
amount (proportionate to the Company's equity interest in such Subsidiary) equal
to the net worth of such Subsidiary of the Company at the time that such
Subsidiary is designated as an Unrestricted Subsidiary; (ii) at any date the
aggregate of all Restricted Payments made as Investments since the Issue Date
shall exclude and be reduced by an amount (proportionate to the Company's equity
interest in such Subsidiary) equal to the net worth of any Unrestricted
Subsidiary at the time that such Unrestricted Subsidiary is designated a
Restricted Subsidiary, not to exceed, in the case of any such redesignation of
an Unrestricted Subsidiary as a Restricted Subsidiary, the amount of Investments
previously made by the Company and the Restricted Subsidiaries in such
Unrestricted Subsidiary (in each case (i) and (ii) "net worth" to be calculated
based upon the fair market value of the assets of such Subsidiary as of any such
date of designation); and (iii) any property transferred to or from an
Unrestricted Subsidiary shall be valued at its fair market value at the time of
such transfer.
 
    (c) Notwithstanding the foregoing, the Board of Directors of the Company may
not designate any Subsidiary of the Company to be an Unrestricted Subsidiary
unless such Subsidiary has been organized or acquired after the Issue Date or
if, after such designation, (x) the Company or any other Restricted Subsidiary
(i) provides credit support for, or a guarantee of, any Indebtedness or any
other obligation (contingent or otherwise) of such Subsidiary (including any
undertaking, agreement or instrument evidencing such Indebtedness) or (ii) is
directly or indirectly liable for any Indebtedness of such Subsidiary (including
by way of recourse only to properties or assets), (y) a default with respect to
any Indebtedness of such Subsidiary (including any right which the holders
thereof may have to take enforcement action against such Subsidiary) would
permit (upon notice, lapse of time or both) any holder of any other Indebtedness
of the Company or any Restricted Subsidiary to declare a default on such other
Indebtedness or cause payment thereof to be accelerated or payable prior to its
final scheduled maturity or (z) such Subsidiary owns any Capital Stock of, or
owns or holds any Lien on any property of, any Restricted Subsidiary which is
not a Subsidiary of the Subsidiary to be so designated.
 
    (d) Notwithstanding anything to the contrary herein, all Subsidiaries of a
Restricted Subsidiary will be Restricted Subsidiaries and all Subsidiaries of an
Unrestricted Subsidiary will be Unrestricted Subsidiaries.
 
    LIMITATION ON PREFERRED STOCK OF RESTRICTED SUBSIDIARIES
 
    The Indenture provides that the Company shall not cause or permit any
Restricted Subsidiary to issue any Preferred Stock (other than to the Company or
to a Qualified Restricted Subsidiary) or permit any Person (other than the
Company or a Qualified Restricted Subsidiary) to own or hold any Preferred Stock
of any Restricted Subsidiary; PROVIDED, HOWEVER, that (A) this covenant shall
not prohibit the issuance of any Preferred Stock by any Restricted Subsidiary
pursuant to clause (x) of the definition of Permitted Indebtedness and (B) if as
of any date any Person other than the Company or a Qualified Restricted
Subsidiary owns or holds any Preferred Stock of a Restricted Subsidiary or holds
any Lien in respect of any such Preferred Stock, such date shall be deemed the
date of an issuance of Preferred Stock by a Restricted Subsidiary that is not in
compliance with this covenant.
 
    LIMITATION ON SALE AND LEASEBACK TRANSACTIONS
 
    The Indenture provides that the Company shall not, and shall not cause or
permit any Restricted Subsidiary to, directly or indirectly, enter into any Sale
and Leaseback Transaction, except that the Company or any Restricted Subsidiary
may enter into a Sale and Leaseback Transaction if (i) immediately prior
thereto, and after giving effect to such Sale and Leaseback Transaction (the
Indebtedness thereunder being equivalent to the capitalized amount thereof that
would appear on the balance sheet of the Company or such Restricted Subsidiary
in accordance with GAAP) the Company could Incur at least $1.00 of additional
secured Indebtedness (other than Permitted Indebtedness) in compliance with the
covenant described above under the heading "The Exchange Offer--Certain
Covenants--Limitations on Indebtedness and Preferred Stock" and (ii) the
transaction constitutes an Asset Sale effected in accordance with the
 
                                       88
<PAGE>
requirements of the section above headed "The Exchange Offer--Certain
Covenants--Limitation on Asset Sales".
 
    MERGER, CONSOLIDATION AND SALE OF ASSETS
 
    The Indenture provides as follows:
 
    (a) The Company shall not, in a single transaction or a series of related
transactions, consolidate or merge with or into any Person, or sell, assign,
transfer, lease, convey or otherwise dispose of (or cause or permit any
Subsidiary of the Company to sell, assign, transfer, lease, convey or otherwise
dispose of) all or substantially all of the Company's and the Company's
Subsidiaries' properties and assets (determined on a consolidated basis for the
Company and the Company's Subsidiaries taken as a whole) whether as an entirety
or substantially as an entirety to any Person or adopt a Plan of Liquidation
unless:
 
            (i) either (1) the Company shall be the surviving or continuing
       corporation or (2) the Person (if other than the Company) formed by such
       consolidation or into which the Company is merged or the Person which
       acquires by sale, assignment, transfer, lease, conveyance or other
       disposition of the properties and assets of the Company and of the
       Company's Subsidiaries substantially as an entirety, or in the case of a
       Plan of Liquidation, the Person to which assets of the Company and of the
       Company's Subsidiaries have been transferred (x) shall be a corporation
       organized and validly existing under the laws of the U.S. or any State
       thereof or the District of Columbia and (y) shall expressly assume, by
       supplemental indenture (in form and substance satisfactory to the
       Trustee), executed and delivered to the Trustee, the due and punctual
       payment of the principal of, and premium, if any, and interest on all of
       the Old Notes and the performance of every covenant of the Old Notes, the
       Indenture and the Registration Rights Agreement on the part of the
       Company to be performed or observed;
 
            (ii) immediately after giving effect to such transaction and the
       assumption contemplated by clause (i)(2)(y) above (including giving
       effect to any Indebtedness and Acquired Indebtedness Incurred or
       anticipated to be Incurred in connection with or in respect of such
       transaction), the Company (in the case of clause (1) of the foregoing
       clause (i)) or such Person (in the case of clause (2) thereof) (1) shall
       not have a Debt to Cash Flow Ratio greater than 90% of the Debt to Cash
       Flow Ratio of the Company immediately prior to such transaction and (2)
       shall be able to Incur at least $1.00 of additional Indebtedness pursuant
       to the Debt to Cash Flow Ratio test of subclause (I)(B)(2) of paragraph
       (b) of the covenant described above under the heading "The Exchange
       Offer--Certain Covenants--Limitation on Indebtedness and Preferred
       Stock;"
 
           (iii) immediately before and immediately after giving effect to such
       transaction and the assumption contemplated by clause (i)(2)(y) above
       (including, without limitation, giving effect to any Indebtedness and
       Acquired Indebtedness Incurred or anticipated to be Incurred and any Lien
       granted in connection with or in respect of the transaction) no Default
       and no Event of Default shall have occurred or be continuing; and
 
            (iv) the Company or such Person shall have delivered to the Trustee
       (A) an Officers' Certificate and an Opinion of Counsel, each stating that
       such consolidation, merger, sale, assignment, transfer, lease,
       conveyance, other disposition or Plan of Liquidation and, if a
       supplemental indenture is required in connection with such transaction,
       such supplemental indenture, comply with the applicable provisions of the
       Indenture and that all conditions precedent in the Indenture relating to
       such transaction have been satisfied and (B) a certificate from the
       Company's independent certified public accountants stating that the
       Company has made the calculations required by clause (ii) above in
       accordance with the terms of the Indenture and the Old Notes after the
       consummation of such transaction.
 
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<PAGE>
    Notwithstanding clause (ii) (2) above, (A) any Restricted Subsidiary of the
Company may consolidate with, or merge with or into, or sell, assign, transfer,
lease, convey or otherwise dispose of all or substantially all of its assets to
the Company or to a Qualified Restricted Subsidiary and (B) the Company or any
of its Subsidiaries may consolidate with or merge with or into any Person that
has conducted no business and incurred no Indebtedness or other liabilities if
such transaction is solely for the purpose of effecting a change in the state of
incorporation of the Company or such Subsidiary.
 
    (b) For purposes of the foregoing, the transfer (by lease, assignment, sale
or otherwise, in a single transaction or series of transactions) of all or
substantially all of the properties and assets of one or more Subsidiaries of
the Company, the Capital Stock of which constitutes all or substantially all of
the properties and assets of the Company, shall be deemed to be the transfer of
all or substantially all of the properties and assets of the Company.
 
    (c) For all purposes of the Indenture and the Old Notes including the
provisions of this covenant and the covenants respectively described in
"--Limitations on Restricted Payments", "The Exchange Offer-- Certain
Covenants--Limitation on Designation of Restricted and Unrestricted
Subsidiaries" and "--Limitation on Liens", Subsidiaries of the Company or any
surviving or transferee entity will, upon such transaction or series of
transactions, become Restricted Subsidiaries or Unrestricted Subsidiaries as
provided pursuant to "The Exchange Offer--Certain Covenants--Limitation on
Designation of Restricted and Unrestricted Subsidiaries" and all Indebtedness,
and all Liens on property or assets, of the Company and the Restricted
Subsidiaries immediately prior to such transaction or series of transactions
will be deemed to have been incurred upon such transaction or series of
transactions.
 
    REPORTING REQUIREMENTS
 
    (a) The Indenture provides that, after such time as the Company is required
to effect an Exchange Offer or otherwise register the resale of the Old Notes
pursuant to the Registration Rights Agreement or the Old Notes become eligible
for resale pursuant to Rule 144(k), the Company (at its own expense) shall file
with the Commission and shall file with the Trustee within 15 days after it
files them with the Commission copies of the quarterly and annual reports and of
the information, documents, and other reports (or copies of such portions of any
of the foregoing as the Commission may by rules and regulations prescribe) to be
filed pursuant to Section 13 or 15(d) of the Exchange Act (without regard to
whether the Company is subject on or after such time to the requirements of such
Section 13 or 15(d) of the Exchange Act). Upon qualification of the Indenture
under the TIA, the Company shall also comply with the provisions of TIA
Section314(a).
 
    (b) The Indenture provides that the Company shall, at the Company's expense,
cause an annual report for each fiscal year and a quarterly report for each
fiscal quarter each containing the financial information substantially similar
to that which would be required to be filed by the Company pursuant to Section
13 of the Exchange Act if it were then subject to the reporting requirements of
Section 13 of the Exchange Act to be mailed by first class mail to each
beneficial holder of the Old Notes (whether or not the Company is then subject
to such reporting requirements of the Exchange Act) it being understood that any
discussion of financial condition and results of operation need only be a
summary of such items. In addition (and without duplication) at the Company's
expense, the Company shall cause an annual report if furnished by it to
stockholders generally and each quarterly or other financial report if furnished
by it to stockholders generally to be filed with the Trustee and mailed to the
Holders at their addresses appearing in the register of Old Notes by the note
registrar at the time of such mailing or furnishing to stockholders.
 
    (c) During the period beginning on the latest date of the original issuance
of any of the Old Notes or the date any Old Note was acquired from the Company
or any Affiliate of the Company after the Issue Date and ending on the date that
is three years from such latest date, the Company covenants and agrees that it
shall, during any period in which it is not subject to Section 13 or 15(d) under
the Exchange Act or not filing the reports and other information required
thereby when so subject, make available to any
 
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Holder or beneficial owner of Old Notes which continue to be Restricted
Securities in connection with any sale thereof and any prospective purchaser of
Old Notes from such Holder or beneficial owner the information required pursuant
to Rule 144A(d)(4) under the Securities Act upon the request of any Holder or
beneficial owner of the Old Notes and it will take such further action as any
Holder or beneficial owner to sell its Old Notes without registration under the
Securities Act within the limitation of the exemption provided by Rule 144A.
 
EVENTS OF DEFAULT AND REMEDIES
 
    EVENTS OF DEFAULT
 
    The Indenture provides that an Event of Default shall occur upon the
happening of any of the following (whatever the reason for such Event of Default
and whether it shall be voluntary or involuntary or be effected by operation of
law or pursuant to any judgment, decree or order of any court or any order, rule
or regulation of any administrative or governmental body):
 
            (i) the failure to pay interest on any Old Note for a period of 30
       days or more after such interest becomes due and payable; or the failure
       to pay additional interest under the Registration Rights Agreement
       pursuant to Section 4 thereof for a period of 30 days or more after such
       additional interest becomes due and payable; or
 
            (ii) the failure to pay the principal or Accreted Value on any Old
       Note, when such principal or Accreted Value becomes due and payable, at
       maturity, upon redemption, pursuant to a Net Proceeds Offer, a Change of
       Control Offer or otherwise; or
 
           (iii) a default in the observance or performance of any other
       covenant or agreement contained in the Indenture, which default continues
       for a period of 45 days after the Company receives written notice
       specifying the default (and requiring that such default be remedied) from
       the Trustee or from Holders of not less than 25% in aggregate principal
       amount of outstanding Old Notes; or
 
            (iv) default under any mortgage, indenture or instrument under which
       there may be issued or by which there may be secured or evidenced any
       Indebtedness for money borrowed by the Company or any Material Subsidiary
       (or the payment of which is guaranteed by the Company or any Material
       Subsidiary), whether such Indebtedness or guarantee now exists, or is
       created after the Issue Date, which default (a) is caused by a failure to
       pay at final maturity or when due principal on such Indebtedness within
       the grace period provided in such Indebtedness (which failure continues
       beyond any applicable grace period) (a "PAYMENT DEFAULT") or (b) results
       in the acceleration of such Indebtedness prior to its express maturity
       and, in each case, the principal amount of any such Indebtedness,
       together with the principal amount of any other such Indebtedness under
       which there has been a Payment Default or the maturity of which has been
       so accelerated, aggregates $5,000,000 or more; or
 
            (v) one or more judgments in an aggregate amount in excess of
       $5,000,000 (which are not paid or covered by third-party insurance by
       financially sound insurers that have not finally disclaimed coverage)
       being rendered against the Company or any of its Material Subsidiaries
       and such judgment or judgments remain undischarged, or unstayed or
       unsatisfied for a period of 60 days after such judgment or judgments
       become final and non-appealable; or
 
            (vi) as a consequence of the occurrence or continuation of any event
       or condition (other than the passage of time), the Company or any
       Material Subsidiary has become obligated to purchase or repay
       Indebtedness before its regular maturity or before its regularly
       scheduled dates of payment in an aggregate principal amount of at least
       $5,000,000 or one or more Persons have the right to require the Company
       or any Material Subsidiary to purchase or repay such Indebtedness; or
 
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           (vii) the Company or any Material Subsidiary (A) commences a
       voluntary case or proceeding under any Bankruptcy Law with respect to
       itself, (B) consents to the entry of a judgment, decree or order for
       relief against it in an involuntary case or proceeding under any
       Bankruptcy Law, (C) consents to the appointment of a Custodian of it or
       for substantially all of its property, (D) consents to or acquiesces in
       the institution of a bankruptcy or an insolvency proceeding against it,
       (E) makes a general assignment for the benefit of its creditors, or (F)
       takes any corporate action to authorize or effect any of the foregoing;
       or
 
          (viii)  a court of competent jurisdiction enters a judgment, decree or
       order for relief in respect of the Company or any Material Subsidiary in
       an involuntary case or proceeding under any Bankruptcy Law, which shall
       (A) approve as properly filed a petition seeking reorganization,
       arrangement, adjustment or composition in respect of the Company or any
       Material Subsidiary, (B) appoint a custodian of the Company or any
       Material Subsidiary or for substantially all of its property, or (C)
       order the winding-up or liquidation of its affairs; and such judgment,
       decree or order shall remain unstayed and in effect for a period of 60
       consecutive days; or
 
            (ix) any holder of at least $5,000,000 in aggregate principal amount
       of Indebtedness of the Company or any Material Subsidiary shall commence
       judicial proceedings to foreclose upon assets of the Company or any
       Material Subsidiary having an aggregate fair market value, individually
       or in the aggregate, of at least $5,000,000 or shall have exercised any
       right under applicable law or applicable security documents to take
       ownership of any such assets in lieu of foreclosure.
 
    The Company shall provide an Officers' Certificate to the Trustee promptly
upon any officer of the Company obtaining knowledge of any Default or Event of
Default (PROVIDED, HOWEVER, that pursuant to the reporting requirements of the
Indenture such officers shall provide such certification at least annually
whether or not they know of any Default or Event of Default) that has occurred
and, if applicable, describe such Default or Event of Default and the status
thereof.
 
    If an Event of Default (other than an Event of Default specified in clauses
(vii) and (viii) above with respect to the Company) occurs and is continuing,
then and in every such case, the Trustee or the Holders of not less than 25% in
aggregate principal amount of the then outstanding Old Notes may declare the
Accreted Value (if prior to June 15, 2000) or all the unpaid principal of,
premium, if any, and accrued and unpaid interest on (if on or after June 15,
2000), all the Old Notes then outstanding to be due and payable, by a notice in
writing to the Company (and to the Trustee, if given by Holders) specifying the
Event of Default and that it is a "notice of acceleration" (the "Acceleration
Notice") and upon such declaration the Accreted Value (if prior to June 15,
2000) or such principal amount, premium, if any, and accrued and unpaid interest
(if on or after June 15, 2000) will become immediately due and payable,
notwithstanding anything contained in the Indenture or the Old Notes to the
contrary. If an Event of Default specified in clauses (vii) or (viii) above with
respect to the Company occurs, all unpaid principal of, and premium, if any, and
accrued and unpaid interest on, the Old Notes then outstanding will IPSO FACTO
become due and payable without any declaration or other act on the part of the
Trustee or any Holder.
 
    After a declaration of acceleration, but before a judgment or decree of
money due in respect to the Old Notes has been obtained, the Holders of not less
than a majority in aggregate principal amount of the Old Notes then outstanding
by written notice to the Trustee may rescind an acceleration and its
consequences if all existing Events of Default (other than the nonpayment of
principal of and premium, if any, and interest on the Old Notes which has become
due solely by virtue of such acceleration) have been cured or waived and if the
rescission would not conflict with any judgment or decree. No such rescission
shall affect any subsequent Default or impair any right consequent thereto.
 
    Subject to certain provisions of the Indenture, prior to the declaration of
an acceleration of the Old Notes the Holders of not less than a majority in
principal amount of the Old Notes may waive any existing Default or Event of
Default under the Indenture, and its consequences, except a Default in the
payment of
 
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the principal of or interest on any Old Notes or a Default in respect of any
term or provision of the Old Notes or the Indenture that cannot be modified or
amended without the consent of all Holders.
 
    The Holders of the Old Notes may not enforce the Indenture or the Old Notes
except as provided in the Indenture and under the TIA. Subject to the provisions
of the Indenture relating to the duties of the Trustee, the Trustee is under no
obligation to exercise any of its rights or powers under the Indenture at the
request, order or direction of any of the Holders, unless such Holders have
offered to the Trustee reasonable indemnity. Subject to all provisions of the
Indenture and applicable law, the Holders of a majority in aggregate principal
amount of the then outstanding Old Notes have the right to direct the time,
method and place of conducting any proceeding for any remedy available to the
Trustee or exercising any trust or power conferred on the Trustee. The Trustee
may withhold from Holders notice of any continuing Default or Event of Default
(except a Default or Event of Default in the payment of principal of or premium,
if any, or interest on the Old Notes or that resulted from the failure of the
Company to comply with the provisions of "Description of Old Notes--Redemption
or Repurchase at the Option of the Holders--Change of Control" or "The Exchange
Offer--Certain Covenants--Merger, Consolidation and Sale of Assets" above) if it
determines that withholding notice is in their interest.
 
    Under the Indenture, the Company is required to provide an Officers'
Certificate to the Trustee promptly upon any such officer obtaining knowledge of
any Default or Event of Default (provided that such officers shall provide such
certification at least annually whether or not they know of any Default or Event
of Default) that has occurred and, if applicable, describe such Default or Event
of Default and the status thereof.
 
DEFEASANCE
 
    The Indenture provides that the Indenture will cease to be of further effect
as to all outstanding Old Notes (except as to (i) rights of registration of
transfer, substitution and exchange of, (ii) rights of Holders to receive
payments of principal of, premium, if any, and interest on the Old Notes and any
other rights of the Holders with respect to such amounts, (iii) the rights,
obligations and immunities of the Trustee under the Indenture and (iv) certain
other specified provisions in the Indenture (the foregoing exceptions (i)
through (iv) are collectively referred to as the "RESERVED RIGHTS")) if: (1) the
Company irrevocably deposits, or causes to be deposited, with the Trustee, in
trust for the benefit of the Holders pursuant to an irrevocable trust and
security agreement in form and substance reasonably satisfactory to the Trustee
(A) U.S. Legal Tender, (B) U.S. Government Obligations or (C) a combination
thereof, in an amount sufficient after payment of all Federal, state and local
taxes or other charges or assessments in respect thereof payable by the Trustee,
which through the payment of interest and principal provides, not later than one
day before the due date of payment in respect of the Old Notes, U.S. Legal
Tender in an amount which, in the opinion of a nationally recognized firm of
independent certified public accountants expressed in a written certification
thereof (in form and substance reasonably satisfactory to the Trustee) delivered
to the Trustee, is sufficient to pay the principal of, premium, if any, and
interest on the Old Notes then outstanding on the dates on which any such
payments are due and payable in accordance with the terms of the Indenture and
of the Old Notes; PROVIDED, HOWEVER, that (I) the trustee of the irrevocable
trust shall have been irrevocably instructed to pay such money or the proceeds
of such U.S. Government Obligations to the Trustee; (II) the Trustee shall have
been irrevocably instructed to apply such money or the proceeds of such U.S.
Government Obligations to the payment of said principal and interest with
respect to the Old Notes; and (III) such money or the proceeds of such U.S.
Government Obligations shall have been on deposit with the Trustee for a period
of at least 90 days; (2) no Default or Event of Default shall have occurred or
be continuing on the date of such deposit and such deposit will not result in a
Default or Event of Default under the Indenture or a breach or violation of, or
constitute a default under, any other instrument to which the Company or any
Subsidiary of the Company is a party or by which it or its property is bound;
(3) the Company shall have delivered to the Trustee an Opinion of Counsel from
its independent counsel reasonably satisfactory to the Trustee or a tax ruling
from the Internal Revenue Service to the
 
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effect that the Holders will not recognize income, gain or loss for Federal
income tax purposes as a result of such deposit and defeasance and will be
subject to Federal income tax in the same amounts and in the same manner and at
the same times as would have been the case if such deposit and defeasance had
not occurred; (4) the Company shall have delivered to the Trustee an Opinion of
Counsel to the effect that after the 91st day following the deposit, such money
or the proceeds of such U.S. Government Obligations will not be subject to the
effect of any applicable bankruptcy, insolvency, reorganization or similar laws
affecting creditors' rights generally; and (5) the Company has delivered to the
Trustee an Officers' Certificate and an Opinion of Counsel each in form and
substance reasonably satisfactory to the Trustee, each stating that all
conditions precedent relating to the satisfaction and discharge of the Indenture
have been complied with. In addition, the Company may terminate all of its
obligations under the Indenture (except as to certain of the Reserved Rights)
when (a) all outstanding Old Notes theretofore authenticated have been delivered
to the Trustee for cancellation and the Company has paid or caused to be paid
all sums payable under the Indenture by the Company or (b) the Company has
called for redemption pursuant to the Indenture all of the Old Notes under
arrangements satisfactory to the Trustee, the amounts described in clause (1)
above have been deposited as described therein, the conditions in clauses (I)
and (II) of the provision to such clause (1) have been satisfied and the
certificate and opinion described in clause (5) above have been delivered.
 
MODIFICATION OF THE INDENTURE
 
    The Indenture provides that the Company, when authorized by a Board
Resolution, and the Trustee, together, may amend or supplement the Indenture or
the Old Notes without notice to or consent of any Holder: (i) to cure any
ambiguity, defect or inconsistency; PROVIDED, HOWEVER, that such amendment or
supplement does not adversely affect the rights of any Holder; (ii) to effect
the assumption by a successor Person of all obligations of the Company under the
Old Notes, the Indenture and the Registration Rights Agreement in connection
with any transaction complying with "The Exchange Offer--Certain
Covenants--Merger, Consolidation and Sale of Assets" above; (iii) to provide for
uncertificated Old Notes in addition to or in place of certificated Old Notes;
(iv) to comply with any requirements of the Securities and Exchange Commission
in order to effect or maintain the qualification of the Indenture under the TIA;
(v) to make any change that would provide any additional benefit or rights to
the Holders; (vi) to provide for issuance of the Exchange Old Notes (which will
have terms substantially identical in all material respects to the Old Notes
except that the transfer restrictions contained in the Old Notes will be
modified or eliminated, as appropriate), and which will be treated together with
any outstanding Old Notes, as a single issue of securities; or (vii) to make any
other change that does not adversely affect the rights of any Holder under the
Indenture; PROVIDED, HOWEVER, that the Company has delivered to the Trustee an
Opinion of Counsel stating that such amendment or supplement complies with the
provisions of the Indenture.
 
    In addition, subject to certain exceptions, the Company, when authorized by
a Board Resolution, and the Trustee, together, with the written consent of the
Holder or Holders or not less than a majority in the aggregate principal amount
of the then outstanding Old Notes, may amend or supplement the Indenture or the
Old Notes, without notice to any other Holders. Subject to certain exceptions,
the Holder or Holders of not less than a majority in aggregate principal amount
of the outstanding Old Notes may waive compliance by the Company with any
provision of the Indenture or the Old Notes without notice to any other Holder.
However, no amendment, supplement or waiver, shall, without the prior written
consent of each Holder of each Old Note affected thereby: (i) reduce the amount
of Old Notes whose Holders must consent to an amendment, supplement or waiver;
(ii) reduce the rate of or change or have the effect of changing the time for
payment of interest, including defaulted interest, on any Old Note; (iii) reduce
the principal amount or Accreted Value (or rate of accretion) of, or change or
have the effect of changing the fixed maturity of any Old Note, or change the
date on which any Old Note may be subject to redemption or repurchase, or reduce
the redemption or repurchase price therefor; (iv) make any Old Note payable in a
currency other than that stated in the Old Note; (v) make any change in
provisions of the Indenture protecting the right of each Holder to receive
payment of principal of and interest on such Old Note on or
 
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after the due date thereof or to bring suit to enforce such payment or
permitting holders of not less than a majority in aggregate principal amount of
the Old Notes to waive Defaults or Events of Default, other than ones with
respect to the payment of principal of or interest on the Old Notes, or relating
to certain amendments of the Indenture; or (vi) amend, modify or change the
obligation of the Company to make or consummate any Change of Control Offer in
the event of a Change of Control or to make or consummate any Net Proceeds Offer
in respect of any Asset Sale that has been consummated, or modify any of the
provisions or definitions with respect thereto, or waive a default in the
performance of any obligation in respect of any such Change of Control Offer or
Net Proceeds Offer or consent to a departure from any of the terms of such
Change of Control Offer or Net Proceeds Offer.
 
    It shall not be necessary for the consent of the Holders under the Indenture
to approve the particular form of any proposed amendment, supplement or waiver,
but it shall be sufficient if such consent approves the substance thereof. After
an amendment, supplement or waiver under the Indenture becomes effective, the
Company shall mail to the Holders affected thereby a notice briefly describing
the amendment, supplement or waiver. Any failure of the Company to mail such
notice, or any defect therein, shall not, however, in any way impair or affect
the validity of any such supplemental indenture. Notwithstanding the foregoing,
no amendment of the Indenture shall adversely affect the rights of any holder of
Senior Debt under the subordination provisions of the Indenture without the
consent of such holder. Every amendment, waiver or supplement of the Indenture
or the Old Notes shall comply with the TIA as then in effect.
 
GOVERNING LAW
 
    The Indenture provides that it and the Old Notes will be governed by, and
construed in accordance with, the laws of the State of New York but without
giving effect to applicable principles of conflicts of law to the extent that
the application of the law of another jurisdiction would be required thereby.
 
THE TRUSTEE
 
    The Indenture provides that, except during the continuance of an Event of
Default, the Trustee will perform only such duties as are specifically set forth
in the Indenture. During the existence of an Event of Default, the Trustee will
exercise such rights and powers vested in it by the Indenture, and use the same
degree of care and skill in its exercise as a prudent man would exercise or use
under the circumstances in the conduct of his own affairs.
 
    The Indenture and the provisions of the TIA contain certain limitations on
the rights of the Trustee, should it become a creditor of the Company, to obtain
payments of claims in certain cases or to realize on certain property received
in respect of any such claim as security or otherwise. Subject to the TIA, the
Trustee will be permitted to engage in other transactions with the Company or
its Subsidiaries; PROVIDED, HOWEVER, that if the Trustee acquires any
conflicting interest as described in the TIA, it must eliminate such conflict or
resign.
 
CERTAIN DEFINITIONS
 
    "ACCRETED VALUE" means with respect to any Old Note, as of any date of the
determination prior to December 15, 2000, the sum of (a) $532.726 and (b) the
portion of the excess of the principal amount of each Old Note over the amount
which shall have been accreted thereto through such date, such amount to be so
accreted on a daily basis at the rate of 13% per annum, compounded semi-annually
on each June 15 and December 15 from the Issue Date through the date of
determination.
 
    "ACQUIRED INDEBTEDNESS" of any Person means Indebtedness of another Person
and any of such other Person's Subsidiaries existing at the time such other
Person becomes a Subsidiary of such Person or at the time it merges or
consolidates with such Person or any of such Person's Subsidiaries or is assumed
by such Person or any Subsidiary of such Person in connection with the
acquisition of assets from such other Person and in each case not Incurred by
such Person or any Subsidiary of such Person or such other Person
 
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in connection with, or in anticipation or contemplation of, such other Person
becoming a Subsidiary of such Person or such acquisition, merger or
consolidation.
 
    "AFFILIATE" means, when used with reference to any Person, (i) any other
Person directly or indirectly controlling, controlled by, or under direct or
indirect common control with, the referent Person or such other Person, as the
case may be, or (ii) any directors, officer or partner of such Person or any
Person specified in clause (i) above. For the purposes of this definition, the
term "control" when used with respect to any specified Person means the power to
direct or cause the direction of management or policies of such Person, directly
or indirectly, whether through the ownership of voting securities by contract or
otherwise; and the terms "affiliated," "controlling," and "controlled" have
meanings correlative of the foregoing. Neither the Initial Purchaser or any of
its Affiliates shall be deemed to be an Affiliate of the Company or of any of
its Subsidiaries or Affiliates. No Wholly Owned Restricted Subsidiary of the
Company shall be deemed to be an Affiliate of the Company or of any of its
Wholly Owned Restricted Subsidiaries.
 
    "ASSET ACQUISITION" means (a) an Investment by the Company or any Subsidiary
of the Company in any other Person pursuant to which such Person shall become a
Subsidiary of the Company or shall be merged with or into the Company or any
Subsidiary of the Company, or (b) the acquisition by the Company or any
Subsidiary of the Company of assets of any Person comprising a division or line
of business of such Person or all or substantially all of the assets of such
Person.
 
    "ASSET SALE" means any direct or indirect sale, issuance, conveyance,
transfer, lease (other than operating leases entered into in the ordinary course
of business), assignment or other disposition for value (for purposes of this
definition, each a "DISPOSITION") by the Company or by any of its Restricted
Subsidiaries (including, without limitation, pursuant to any Sale and Leaseback
Transaction or any merger or consolidation of any Restricted Subsidiary of the
Company with or into another Person (other than the Company or any Qualified
Restricted Subsidiary) whereby such Restricted Subsidiary shall cease to be a
Restricted Subsidiary of the Company) to any Person of (i) any property or
assets of the Company or of any Restricted Subsidiary of the Company to the
extent that any such disposition is not in the ordinary course of business of
the Company or such Restricted Subsidiary or (ii) any Capital Stock of any
Restricted Subsidiary of the Company, other than (1) any issuance and sale of
Preferred Stock of a Restricted Subsidiary pursuant to clause (xi) of the
definition of Permitted Indebtedness, (2) any disposition to the Company, (3)
any disposition to any Qualified Restricted Subsidiary, (4) any disposition made
in accordance with the Limitation on Restricted Payments, (5) any Lien to the
extent that such Lien is granted in compliance with the Limitation on Liens, (6)
any transaction or series of related transactions consummated in accordance with
the section on Merger, Consolidation and Sale of Assets (except as otherwise
provided in the last paragraph of subsection (a) of the Limitation on Asset
Sales), (7) any transaction or series of related transactions for fair market
value resulting in net cash proceeds to the Company or such Restricted
Subsidiary of less than $10,000,000 in any fiscal year of the Company, (8) the
sale or discount, in each case without recourse (direct or indirect), of
accounts receivable arising in the ordinary course of business of the Company or
such Restricted Subsidiary, as the case may be, but only in connection with the
compromise or collection thereof, (9) disposals or replacements of obsolete or
worn out equipment in the ordinary course of business of the Company or such
Restricted Subsidiary, as the case may be, (10) the factoring of accounts
receivable arising in the ordinary course of business of the Company or such
Restricted Subsidiary, as the case may be, pursuant to customary business terms,
(11) the licensing in the ordinary course of business of the Company or such
Restricted Subsidiary, as the case may be, of the use of the Company's or any of
such Restricted Subsidiaries' intellectual property or FCC Licenses, (12) any
transfer of equipment in the ordinary course of business from the Company or any
Restricted Subsidiary to any other Subsidiary of the Company or (13) the
disposition of contracts in respect of Qualified Projects entered into by the
Company (not previously entered into by any Restricted Subsidiary).
 
    "CAPITAL STOCK" means (i) with respect to any Person that is a corporation,
any and all shares, interests, participations or other equivalents (however
designated and whether or not voting) of corporate stock, including each class
of Common Stock and Preferred Stock of such Person, and (ii) with respect to any
Person that is not a corporation, any and all partnership, membership or other
equity interests of such Person.
 
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    "CAPITALIZED LEASE OBLIGATION" means, as to any Person the discounted rental
stream payable by such Person that is required to be classified and accounted
for as a capital lease obligation under GAAP and, for purposes of this
definition, the amount of such obligation at any date shall be the capitalized
amount of such obligation at such date, determined in accordance with GAAP. The
final maturity of any such obligation shall be the date of the last payment of
rent or any other amount due under such lease prior to the first date upon which
such lease may be terminated by the lessee without penalty.
 
    "CASH EQUIVALENTS" mean (i) marketable direct obligations issued by, or
unconditionally guaranteed by, the U.S. Government or issued by any agency
thereof and backed by the full faith and credit of the U.S., in each case
maturing within one year from the date of acquisition thereof; (ii) marketable
direct obligations issued by any state of the U.S. of America or any political
subdivision of any such state or any public instrumentality thereof maturing
within one year from the date of acquisition thereof and, at the time of
acquisition, having one of the two highest ratings obtainable from either S&P or
Moody's; (iii) commercial paper maturing no more than one year from the date of
creation thereof and, at the time of acquisition, having a rating of at least
A-1 from S&P or at least P-1 from Moody's; (iv) certificates of deposit,
Eurodollar deposits, or bankers' acceptances maturing within one year from the
date of acquisition thereof issued by any commercial bank organized under the
laws of the U.S. of America or any state thereof or the District of Columbia or
any U.S. branch of a foreign bank having at the date of acquisition thereof
combined capital and surplus of not less than $500,000,000; (v) repurchase
agreements and reverse repurchase agreements maturing within one year from the
date entered into with any bank meeting the qualifications specified in clause
(iv) above; and (vi) investments in mutual funds and money market accounts
investing at least 90% of the funds in Investments of the types described in the
foregoing clauses (i) through (v).
 
    "CHANGE OF CONTROL" means the occurrence of one or more of the following
events (whether or not approved by the Board of Directors of the Company):
 
        (i) the Company consolidates with or merges with or into another Person
    or the Company or any of its Subsidiaries, directly or indirectly, sells,
    assigns, conveys, transfers, leases or otherwise disposes of, in one
    transaction or a series of related transactions, all or substantially all of
    the property or assets of the Company and its Subsidiaries (determined on a
    consolidated basis) to any Person or group of related Persons for purposes
    of Sections 13(d) and 14(d) of the Exchange Act, whether or not applicable
    (a "GROUP OF PERSONS"), or any Person consolidates with, or merges with or
    into, the Company (whether or not in compliance with the terms of the
    Indenture), in any such event pursuant to a transaction in which immediately
    after the consummation thereof the Persons owning Voting Stock of the
    Company having greater than 50% of the total voting power of the outstanding
    Voting Stock of the Company immediately prior to the consummation of such
    transaction shall cease to own, directly or indirectly, the Voting Stock of
    the surviving or transferee entity or of the Company having greater than 50%
    of the total voting power of the outstanding Voting Stock of such Person; or
 
        (ii) the approval by the holders of Capital Stock of the Company of any
    Plan of Liquidation (whether or not otherwise in compliance with the
    provisions of the Indenture); or
 
       (iii) any Person or Group of Persons either (1) is or becomes, by
    purchase, tender offer, exchange offer, open market purchases, privately
    negotiated purchases or otherwise, the "beneficial owner" (as defined in
    Rules 13d-3 and 13d-5 under the Exchange Act, whether or not applicable,
    except that a Person shall be deemed to have "beneficial ownership" of all
    securities that such Person has the right to acquire at the time of
    determination, whether such right is exercisable immediately or after the
    passage at the time of determination of ninety (90) days or less), directly
    or indirectly, of Voting Stock of the Company having greater than 50% of the
    total voting power of the outstanding Voting Stock of the Company (for the
    purpose of this clause (iii), such Person or Group of Persons will be deemed
    to "beneficially own" (determined as aforesaid) any Voting Stock of a
    corporation (the "SPECIFIED CORPORATION") held by any other corporation (the
    "PARENT CORPORATION") if such Person or Group of Persons "beneficially
    owns," directly or indirectly, Voting Stock of such parent corporation
    having a
 
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    majority of the voting power of the outstanding Voting Stock of such parent
    corporation) or (2) otherwise has the ability to elect, directly or
    indirectly, a majority of the members of the Board of Directors of the
    Company; PROVIDED, HOWEVER, that for purposes of this clause (iii), a Person
    shall not be deemed the beneficial owner of any securities in respect of
    which beneficial ownership by such Person arises solely as a result of a
    revocable proxy delivered in response to a proxy or consent solicitation
    that is made pursuant to, and in accordance with applicable law for a
    shareholder meeting, or, if the Company is at the time required to file
    reports under Section 13 or 15 of the Exchange Act, and is not then
    reportable on Schedule 13D (or any successor schedule, form or report) under
    the Exchange Act; or
 
        (iv) during any consecutive two-year period, individuals who at the
    beginning of such period constituted the Board of Directors of the Company
    (together with any new directors whose election to such Board of Directors
    or whose nomination for election by the stockholders of the Company was
    approved by a vote of a majority of the directors of the Company then still
    in office who were either directors at the beginning of such period or whose
    election or nomination for election was previously so approved) cease for
    any reason to constitute a majority of the Board of Directors of the Company
    then in office.
 
    For purposes of the foregoing definition of Change of Control, the transfer
(by lease, assignment, sale or otherwise, in a single transaction or series of
related transactions) of all or substantially all of the properties or assets of
one or more Subsidiaries of the Company, the Capital Stock of which constitutes
all or substantially all of the properties and assets of the Company, shall be
deemed to be the transfer of all or substantially all of the properties and
assets of the Company.
 
    "CONSOLIDATED EBITDA" means, with respect to any Person, for any period, the
sum (without duplication) of (i) Consolidated Net Income of such Person for such
period, PLUS, (ii) to the extent that any of the following shall have been taken
into account in determining such Consolidated Net Income, (A) all income taxes
of such Person and its Restricted Subsidiaries paid or accrued in accordance
with GAAP for such period (other than income taxes attributable to
extraordinary, unusual or nonrecurring gains or losses or taxes attributable to
sales or dispositions of assets outside the ordinary course of business), (B)
Consolidated Interest Expense for such Person for such period, (C) amortization
expense (including the amortization of deferred financing charges) and
depreciation expense for such Person and its Restricted Subsidiaries for such
period, and (D) other non-cash items (other than non-cash interest) reducing
Consolidated Net Income for such Person and its Restricted Subsidiaries for such
period, other than any non-cash item for such period that requires the accrual
of or a reserve for cash charges for any future period and other than any
non-cash charge for such period constituting an extraordinary item of loss, LESS
(iii) (A) all non-cash items increasing Consolidated Net Income for such Person
and its Restricted Subsidiaries for such period and (B) all cash payments during
such period relating to non-cash items that were added back in determining
Consolidated EBITDA in any prior period.
 
    "CONSOLIDATED INTEREST EXPENSE" means, with respect to any Person for any
period, the sum of, without duplication, (i) the aggregate of the interest
expense of such Person and its Restricted Subsidiaries for such period, on a
consolidated basis, as determined in accordance with GAAP.
 
    "CONSOLIDATED NET INCOME" of any Person means, for any period, the aggregate
net income (or loss) of such Person and its Restricted Subsidiaries for such
period on a consolidated basis, determined in accordance with GAAP; PROVIDED,
HOWEVER, that there shall be excluded therefrom (a) net after-tax gains and
losses from all sales or other dispositions of assets outside the ordinary
course of business, (b) net after-tax extraordinary or nonrecurring gains or
losses, (c) the net income of any Person acquired in a "pooling of interests"
transaction accrued prior to the date it becomes a Restricted Subsidiary of such
Person or is merged or consolidated with such Person or any Restricted
Subsidiary, (d) the cumulative effect of a change in accounting principles, (e)
any net income of any other Person if such other Person is not a Restricted
Subsidiary and is accounted for by the equity method of accounting, except that
such Person's equity in the net income of any such other Person for such period
shall be included in such
 
                                       98
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Consolidated Net Income up to the aggregate amount of cash actually distributed
by such other Person during such period to such Person or a Restricted
Subsidiary as a dividend or other distribution (subject, in the case of a
dividend or other distribution to a Restricted Subsidiary, to the limitation
that such amount so paid to Restricted Subsidiary shall be excluded to the
extent that such amount could not at that time be paid to the Company or
Qualified Restricted Subsidiary due to the restrictions set forth in clause (f)
below (regardless of any waiver of such conditions)), (f) any net income of any
Restricted Subsidiary if such Restricted Subsidiary is subject to restrictions,
directly or indirectly, by contract, operation of law, pursuant to its charter
or otherwise on the payment of dividends or the making of distributions by such
Restricted Subsidiary to such Person, except that (A) such Person's equity in
the net income of any such Restricted Subsidiary for such period shall be
included in such Consolidated Net Income up to the aggregate amount of cash that
could have been paid or distributed during such period to such Person or a
Qualified Restricted Subsidiary as a dividend or other distribution (provided
that such ability is not due to a waiver of such restriction) and (B) such
Person's equity in a net loss of any such Restricted Subsidiary for such period
shall be included in determining such Consolidated Net Income, (g) any
restoration to income of any contingency reserve, except to the extent that
provision for such reserve was made out of Consolidated Net Income accrued at
any time following the Issue Date, (h) income or loss attributable to
discontinued operations (including, without limitation, operations disposed of
during such period whether or not such operations were classified as
discontinued), and (i) in the case of a successor to such Person by
consolidation or merger or as a transferee of such Person's assets, any net
income or loss of the successor corporation prior to such consolidation, merger
or transfer of assets.
 
    "CONSOLIDATED TOTAL INDEBTEDNESS" shall mean, with respect to any Person, on
any date, without duplication, the aggregate outstanding principal amount of
Indebtedness of such Person and its Restricted Subsidiaries.
 
    "DEBT TO CASH FLOW RATIO" means, as to any Person, the ratio of (i) the
Consolidated Total Indebtedness of such Person as of the date of calculation
(the "DETERMINATION DATE") to (ii) the product of (A) the Consolidated EBITDA of
such Person for the full fiscal quarter for which financial information is
available ending not more than 135 days prior to the transaction or event giving
rise to the need to calculate the Debt to Cash Flow Ratio (such fiscal quarter,
the "MEASUREMENT PERIOD") and (B) four.
 
    For purposes of this definition, the Consolidated Total Indebtedness of the
Person as of the Determination Date shall be adjusted as if the Indebtedness
giving rise to the need to perform such calculation had been Incurred and the
proceeds therefrom had been applied on the Determination Date. For purposes of
calculating Consolidated EBITDA of the Company for the Measurement Period
immediately prior to the relevant Determination Date, (I) any Person that is a
Restricted Subsidiary on such Determination Date (or would become a Restricted
Subsidiary on such Determination Date in connection with the transaction that
requires the determination of such ratio) will be deemed to have been a
Restricted Subsidiary at all times during such Measurement Period, (II) any
Person that is not a Restricted
 
Subsidiary on such Determination Date (or would cease to be a Restricted
Subsidiary on such Determination Date in connection with the transaction that
requires the determination of such ratio) will be deemed not to have been a
Restricted Subsidiary at any time during such Measurement Period, and (III) if
the Company or any Restricted Subsidiary shall have in any manner (x) acquired
(including through an Asset Acquisition or the commencement of activities
constituting such operating business) or (y) disposed of (including by way of an
Asset Sale or the termination or discontinuance of activities constituting such
operating business) of any operating business during the Measurement Period or
after the end of such Measurement Period and on or prior to the Determination
Date, such calculation will be made on a PRO FORMA basis in accordance with GAAP
as if, in the case of an Asset Acquisition or the commencement of activities
constituting such operating business, all such transactions had been consummated
on the first day of such Measurement Period and, in the case of an Asset Sale or
termination or discontinuance of activities constituting such operating
business, all such transactions had been consummated prior to the first day of
such Measurement Period; PROVIDED, HOWEVER, that such PRO FORMA adjustment shall
not give effect to the
 
                                       99
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Consolidated EBITDA of any acquired Person to the extent that such Person's net
income would be excluded pursuant to clause (f) of the definition of
Consolidated Net Income.
 
    "DEFAULT" means an event or condition the occurrence of which is, or with
the lapse of time or the giving of notice or both would be, an Event of Default.
 
    "DISQUALIFIED CAPITAL STOCK" means any Capital Stock which, by its terms (or
by the terms of any security into which it is convertible or for which it is
exchangeable), or upon the happening of any event, is required to be redeemed or
is redeemable (at the option of the holder thereof) at any time prior to the
earlier of the repayment of all Old Notes or the stated maturity of the Old
Notes or is exchangeable for Indebtedness at any time prior to the earlier of
the repayment of all Old Notes or the stated maturity of the Old Notes.
 
    "EVENT OF DEFAULT" has the meaning provided in the Events of Default and
Remedies section.
 
    "FCC LICENSE" means an authorization that has been duly granted by the
Federal Communications Commission, approving the control and use of specified
frequencies by the licensed Person.
 
    "FAIR MARKET VALUE" or "FAIR VALUE" means, with respect to any asset or
property, the price which could be negotiated in an arms-length, free market
transaction, for cash, between an informed and willing seller and an informed
and willing and able buyer, neither of whom is under undue pressure or
compulsion to complete the transaction. Fair market value shall be determined by
the Board of Directors of the Company acting in good faith and shall be
evidenced by a Board Resolution (certified by the Secretary or Assistant
Secretary of the Company) delivered to the Trustee; provided, however, that if
(A) the aggregate non-cash consideration to be received by the Company or any of
its Subsidiaries from any Asset Sale shall reasonably be expected to exceed
$5,000,000 or (B) the net worth of any Restricted Subsidiary to be designated as
an Unrestricted Subsidiary shall reasonably be expected to exceed $10,000,000,
in each case, upon completion of the transaction occasioning such calculation,
then fair market value shall be determined by an Independent Financial Advisor.
 
    "FIRST SUPPLEMENTAL INDENTURE" means the First Supplemental Indenture to the
Indenture dated as of November 21, 1995.
 
    "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as may be approved by a significant segment of the accounting
profession of the U.S., which are in effect as of the Issue Date.
 
    "GUARANTEE" means any obligation, contingent or otherwise, of any Person
directly or indirectly guaranteeing any Indebtedness or other obligation of any
other Person and, without limiting the generality of the foregoing, any
obligation, direct or indirect, contingent or otherwise, of such Person (i) to
purchase or pay (or advance or supply funds for the purchase or payment of) such
Indebtedness or other obligation of such other Person (whether arising by virtue
of partnership arrangements, or by agreement to keep-well, to purchase assets,
goods, securities or services, to take-or-pay, or to maintain financial
statement conditions or otherwise) or (ii) entered into for purposes of assuring
in any other manner the obligee of such Indebtedness or other obligation of the
payment thereof or to protect such obligee against loss in respect thereof (in
whole or in part); PROVIDED, HOWEVER, that the term "GUARANTEE" shall not
include (a) endorsements for collection or deposit in the ordinary course of
business, or (b) commitments to make Permitted Investments in Restricted
Subsidiaries. The term "GUARANTEE" used as a verb has a corresponding meaning.
 
    "HOLDER" or "NOTEHOLDER" means the Person in whose name an Old Note is
registered on the Registrar's books.
 
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<PAGE>
    "INCUR" means, with respect to any Indebtedness or other obligation of any
Person, to create, issue, incur (by conversion, exchange or otherwise), assume,
guarantee or otherwise become liable in respect of such Indebtedness or other
obligation or the recording, as required pursuant to GAAP or otherwise, of any
such Indebtedness or other obligation on the balance sheet of such Person (and
"INCURRENCE," "INCURRED," "INCURRABLE" and "INCURRING" shall have meanings
correlative to the foregoing).
 
    "INDEBTEDNESS" means with respect to any Person, without duplication,
whether contingent or otherwise, (i) any obligation for money borrowed, (ii) any
obligation evidenced by bonds, debentures, Old Notes, or other similar
instruments, (iii) reimbursement obligations in respect of letters of credit or
other similar instruments, (iv) any obligation to pay the deferred purchase
price of property or services including Capitalized Lease Obligations, (v) the
maximum fixed redemption or repurchase price of Disqualified Capital Stock, (vi)
indebtedness of others of the types described in clauses (i) through (v) above,
secured by a lien on the assets of such Person or its Restricted Subsidiaries,
valued, in such cases where the recourse thereof is limited to such assets, at
the lesser of the principal amount of such Indebtedness or the fair market value
of the subject assets, (vii) indebtedness of others of the types described in
clauses (i) through (v) above, guaranteed by such Person or its Restricted
Subsidiaries and (viii) all obligations of such Person under Interest Swap
Obligations; PROVIDED, HOWEVER, that the amount of any Indebtedness at any date
shall be the outstanding balance of all unconditional obligations and the
maximum liability supported by any contingent obligations at such date.
Notwithstanding the foregoing, "INDEBTEDNESS" shall not be construed to include
trade payables, credit on open account, accrued liabilities or daylight
overdrafts. For purposes hereof, the "MAXIMUM FIXED REDEMPTION OR REPURCHASE
PRICE" of any Disqualified Capital Stock which does not have a fixed repurchase
price shall be calculated in accordance with the terms of such Disqualified
Capital Stock as if such Disqualified Capital Stock were purchased on any date
on which Indebtedness shall be required to be determined pursuant to the
Indenture, and if such price is based upon, or measured by, the fair market
value of such Disqualified Capital Stock, such fair market value shall be
determined reasonably and in good faith by the Board of Directors of the issuer
of such Disqualified Capital Stock. The amount outstanding at any time of any
Indebtedness issued with original issue discount is the full amount of such
Indebtedness less the remaining unamortized portion of the original issue
discount of such Indebtedness at such time as determined in conformity with
GAAP.
 
    "INDENTURE" means the Indenture, as amended or supplemented by the First
Supplemental Indenture and the Second Supplemental Indenture and as further
amended or supplemented from time to time in accordance with the terms thereof.
 
    "INDEPENDENT FINANCIAL ADVISOR" means an accounting, appraisal, investment
banking or consulting firm of nationally recognized standing that is, in the
reasonable and good faith judgment of the Board of Directors of the Company,
qualified to perform the task for which such firm has been engaged and
disinterested and independent with respect to the Company and its Affiliates.
 
    "INITIAL PURCHASER" means Smith Barney Inc.
 
    "INSTITUTIONAL ACCREDITED INVESTOR" means an institution that is an
"accredited investor" as that term is defined in Rule 501(a) (1), (2), (3) or
(7) under the Securities Act.
 
    "INTEREST PAYMENT DATE" means the stated maturity of an installment of
interest on the Old Notes.
 
    "INTEREST SWAP OBLIGATIONS" means the obligations of any Person under any
interest rate protection agreement, interest rate future, interest rate option,
interest rate swap, interest rate cap or other interest rate hedge or
arrangement.
 
    "INTERNAL REVENUE CODE" means the Internal Revenue Code of 1986, as amended
to the date hereof and from time to time hereafter.
 
    "INVESTMENT" by any Person means any direct or indirect (i) loan, advance or
other extension of credit or capital contribution (by means of transfers of cash
or other property or assets (valued at the fair market
 
                                      101
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value thereof as of the date of transfer) to other Persons or payments for
property or services for the account or use of other Persons, or otherwise);
(ii) purchase or acquisition of Capital Stock, bonds, Old Notes, debentures or
other securities or evidences of Indebtedness issued by any other Person
(whether by merger, consolidation, amalgamation or otherwise and whether or not
purchased directly from the issuer of such securities or evidences of
Indebtedness); (iii) guarantee or assumption of any Indebtedness or any other
obligation of any other Person (except for an assumption of Indebtedness for
which the assuming Person receives consideration at the time of such assumption
in the form of property or assets with a fair market value at least equal to the
principal amount of the Indebtedness assumed); (iv) the acquisition, by purchase
or otherwise, of all or substantially all of the business or assets or other
beneficial ownership of any Person; and (v) all other items that would be
classified as investments (including, without limitation, purchases of assets
outside the ordinary course of business) on a balance sheet of such Person
prepared in accordance with GAAP. Notwithstanding the foregoing, the purchase or
acquisition of any securities of any other Person solely with Qualified Capital
Stock shall not be deemed to be an Investment. Investments shall exclude
extensions of trade credit and advances to customers and suppliers to the extent
made in the ordinary course of business on ordinary business terms. The amount
of any non-cash Investment shall be the fair market value of such Investment, as
determined conclusively in good faith by management of the Company unless the
fair market value of such Investment exceeds $5,000,000, in which case the fair
market value shall be determined conclusively in good faith by the Board of
Directors of the Company at the time such Investment is made. The amount of any
Investment shall not be adjusted for increases or decreases in value, or
write-ups, write-downs or write-offs with respect to such Investment.
 
    "ISSUE DATE" means June 15, 1995.
 
    "LIEN" means, with respect to any asset, any mortgage, lien, pledge, charge,
security interest or other similar encumbrance (including without limitation,
any conditional sale or other title retention agreement or lease in the nature
thereof, any option or other agreement to sell, and any filing of or agreement
to give, any security interest).
 
    "MATERIAL SUBSIDIARY" means, at any date of determination, any Subsidiary of
the Company which together with its Subsidiaries and each Defaulting Subsidiary
(as defined below) either (A) had assets which, as of the date of the Company's
most recent quarterly consolidated balance sheet, constituted at least 25% of
the Company's total assets on a consolidated basis as of such date, in each case
determined in accordance with GAAP, or (B) had EBITDA for the 12-month period
ending on the date of the Company's most recent quarterly consolidated statement
of income which constituted at least 25% of the Company's Consolidated EBITDA
(such calculation of Consolidated EBITDA of the Company for the purposes of this
definition to be calculated without giving effect to clause (f) of the
definition of Consolidated Net Income) for such period. "DEFAULTING SUBSIDIARY"
means any Subsidiary of the Company with respect to which an event described
under clause (iv), (v), (vii), (viii) or (ix) of Events of Default and Remedies
Section has occurred and is continuing, determined as if the references to the
words "Material Subsidiary" in each such clause were a reference to the words
"Subsidiary of the Company" therein.
 
    "MATURITY DATE" means June 15, 2005.
 
    "NET CASH PROCEEDS" means with respect to any Asset Sale, the proceeds in
the form of cash or Cash Equivalents including payments in respect of deferred
payment obligations when received in the form of cash or Cash Equivalents
received by the Company or any of its Restricted Subsidiaries from such Asset
Sale, net of (a) reasonable out-of-pocket expenses and fees relating to such
Asset Sale (including, without limitation, brokerage, legal, accounting and
investment banking fees and sales commissions), (b) taxes paid or payable after
taking into account any reduction in tax liability due to available tax credits
or deductions and any tax sharing arrangements, (c) repayment of Indebtedness
(other than any intercompany Indebtedness) that is required by the terms thereof
to be repaid or pledged as cash collateral, or the holders of which otherwise
have a contractual claim which is legally superior to any claim of the Holders
(including a restriction on transfer) to the proceeds of the subject assets, in
connection with such Asset Sale, and
 
                                      102
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(d) appropriate amounts to be provided by the Company or any Restricted
Subsidiary of the Company, as the case may be, as a reserve, in accordance with
GAAP, against any liabilities associated with such Asset Sale and retained by
the Company or any Restricted Subsidiary of the Company, as the case may be,
after such Asset Sale, including, without limitation, pension and other
post-employment benefit liabilities, liabilities related to environmental
matters and liabilities under any indemnification obligations associated with
such Asset Sale.
 
    "NET EQUITY PROCEEDS" means (a) in the case of any sale by the Company of
Qualified Capital Stock of the Company, the aggregate net proceeds received by
the Company, after payment of expenses, commissions and the like (including,
without limitation, brokerage, legal, accounting and investment banking fees and
commissions) incurred in connection therewith, and (b) in the case of any
exchange, exercise, conversion or surrender of any outstanding Indebtedness of
the Company or any Restricted Subsidiary of the Company for or into shares of
Qualified Capital Stock of the Company, the amount of such Indebtedness (or, if
such Indebtedness was issued at an amount less than the stated principal amount
thereof, the accrued amount thereof as determined in accordance with GAAP) as
reflected in the consolidated financial statements of the Company prepared in
accordance with GAAP as of the most recent date next preceding the date of such
exchange, exercise, conversion or surrender (plus any additional amount required
to be paid by the holder of such Indebtedness to the Company or to a Qualified
Restricted Subsidiary of the Company upon such exchange, exercise, conversion or
surrender and less any and all payments made to the holders of such
Indebtedness, and all other expenses incurred by the Company in connection
therewith), in the case of each of (a) and (b) above to the extent consummated
after the Issue Date; PROVIDED, HOWEVER, that Net Equity Proceeds shall not
include or be deemed to include (A) the exchange, exercise, conversion or
surrender of any Indebtedness outstanding or Incurred on the Issue Date that is
subordinated (whether pursuant to its terms or by operation of law) to the Old
Notes, (B) any Net Equity Proceeds from a Public Equity Offering to the extent
utilized to redeem the Old Notes and (C) the issuance of equity of the Company
(including, without limitation, any warrants to acquire equity) as a unit with
any Old Notes.
 
    "NET PROCEEDS OFFER" has the meaning provided in the provisions of the
section headed "Limitation of Asset Sales" above.
 
    "NET PROCEEDS OFFER AMOUNT" has the meaning provided in the provisions of
the section headed "Limitations on Asset Sales", above.
 
    "NET PROCEEDS OFFER PAYMENT DATE" has the meaning provided in the provisions
of the section headed "Limitations on Asset Sales", above.
 
    "NET PROCEEDS OFFER TRIGGER DATE" has the meaning provided in the provisions
of the section headed "Limitations on Asset Sales", above.
 
    "OLD NOTES" mean the Initial Old Notes and the Exchange Old Notes treated as
a single class of securities, as amended or supplemented from time to time in
accordance with the terms hereof, that are issued pursuant to the Indenture.
 
    "OBLIGATIONS" mean all obligations for principal, premium, interest,
penalties, fees, indemnifications, reimbursements, damages and other liabilities
payable under the documentation governing any Indebtedness.
 
    "OFFERING MEMORANDUM" means the Confidential Private Placement Offering
Memorandum dated June 14, 1995 of the Company relating to the offering of the
Old Notes, as amended and supplemented from time to time.
 
    "OFFICERS' CERTIFICATE" means, with respect to any person, a certificate
signed by two Officer or by an Officer and either an Assistant Treasurer or an
Assistant Secretary of such Person and otherwise complying
 
                                      103
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with the requirements of Sections 10.04 and 10.05 of the Indenture, as they
relate to the making of an Officers' Certificate.
 
    "OPINION OF COUNSEL" means a written opinion from legal counsel who is
reasonably acceptable to the Trustee complying with the requirements of Sections
10.04 and 10.05 of the Indenture, as they relate to the giving of an Opinion of
Counsel.
 
    "PERMITTED INDEBTEDNESS" means, without duplication, each of the following:
 
        (i) Indebtedness Incurred by the Company under the Initial Old Notes and
    the Exchange Old Notes and any Refinancing Indebtedness Incurred to
    Refinance such Indebtedness;
 
        (ii) Indebtedness Incurred by the Company under revolving credit and
    letter of credit facilities and any Refinancing Indebtedness Incurred to
    Refinance such Indebtedness to the extent that the aggregate principal
    amount at any time outstanding of such Indebtedness and any such Refinancing
    Indebtedness does not exceed $25,000,000;
 
       (iii) Indebtedness of the Company and its Subsidiaries outstanding on the
    Issue Date and reflected in the financial statements set forth in the
    Offering Memorandum as in effect on the Issue Date reduced by the amount of
    any scheduled amortization payments or mandatory prepayments when actually
    paid or permanent reductions thereon and any Refinancing Indebtedness
    Incurred to Refinance such Indebtedness;
 
        (iv) Indebtedness of the Company or of any Restricted Subsidiary of the
    Company under Interest Swap Obligations; PROVIDED, HOWEVER, that such
    Interest Swap Obligations are entered into to protect the Company or such
    Subsidiary from fluctuations in interest rates on Indebtedness Incurred in
    accordance with the Indenture (as determined in good faith by a senior
    financial officer of the Company), to the extent the notional principal
    amount of such Interest Swap Obligation does not exceed the principal amount
    of the Indebtedness to which such Interest Swap Obligation relates;
 
        (v) additional Indebtedness Incurred by the Company or by any of the
    Restricted Subsidiaries and any Refinancing Indebtedness Incurred to
    Refinance such Indebtedness to the extent that the aggregate principal
    amount at any time outstanding of such Indebtedness and any such Refinancing
    Indebtedness does not exceed the greater of (x) $25,000,000 and (y) the
    product of (I) Consolidated EBITDA of the Company for the most recently
    ended fiscal quarter for which financial statements are available ending not
    more than 135 days prior to the date of determination and (II) four;
 
        (vi) Indebtedness of a direct or indirect Restricted Subsidiary to the
    Company for so long as such Indebtedness is held by the Company or a direct
    or indirect Qualified Restricted Subsidiary in each case subject to no Lien
    held by any Person other than the Company or a Qualified Restricted
    Subsidiary of the Company; PROVIDED, HOWEVER, that if as of any date any
    Person other than the Company or a direct or indirect Qualified Restricted
    Subsidiary owns or holds any such Indebtedness or holds a Lien in respect of
    such Indebtedness, such date shall be deemed the Incurrence of Indebtedness
    not constituting Permitted Indebtedness under this clause (vi) by the issuer
    of such Indebtedness;
 
       (vii) Indebtedness of the Company or of a direct or indirect Restricted
    Subsidiary to any direct or indirect Restricted Subsidiary of the Company
    for so long as such Indebtedness is held by the Company or by a direct or
    indirect Qualified Restricted Subsidiary in each case subject to no Lien
    held by any Person other than the Company or a Qualified Restricted
    Subsidiary; PROVIDED, HOWEVER, that (a) any Indebtedness of the Company to
    any direct or indirect Subsidiary of the Company is unsecured and evidenced
    by an intercompany promissory note that, other than in the case of a foreign
    Restricted Subsidiary, is subordinated, to the Company's obligations under
    the Indenture and the Old Notes, and (b) if as of any date any Person other
    than the Company or a direct or indirect Qualified Restricted Subsidiary
    owns or holds any such Indebtedness or holds a Lien in respect of such
 
                                      104
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    Indebtedness, such date shall be deemed the Incurrence of Indebtedness not
    constituting Permitted Indebtedness under this clause (vii) by the issuer of
    such Indebtedness;
 
      (viii) (A) Indebtedness of any corporation that becomes a Restricted
    Subsidiary after the Issue Date which Indebtedness existed at the time such
    corporation becomes a Restricted Subsidiary; PROVIDED, HOWEVER, that (a)
    such Indebtedness was not Incurred as a result of or in connection with or
    anticipation of such corporation becoming a Restricted Subsidiary, (b)
    immediately before and immediately after giving effect to such corporation
    becoming a Restricted Subsidiary, the Company could Incur at least $1.00 of
    additional Indebtedness in accordance with the Debt to Cash Flow Ratio test
    described above in the section headed "Limitation on Indebtedness and
    Preferred Stock" and (c) such Indebtedness is without recourse to the
    Company or to any of its Subsidiaries or to any of their respective
    properties or assets other than the Person becoming a Restricted Subsidiary
    or its properties and assets and (B) any Refinancing Indebtedness Incurred
    to Refinance such Indebtedness;
 
        (ix) Indebtedness arising from the honoring by a bank or other financial
    institution of a check, draft or similar instrument inadvertently drawn
    against insufficient funds in the ordinary course of business; PROVIDED,
    HOWEVER, that such Indebtedness is extinguished within three Business Days
    of its Incurrence;
 
        (x) (A) Indebtedness Incurred or Preferred Stock issued by any
    Restricted Subsidiary, the proceeds of which will be used to finance
    Qualified Projects; PROVIDED, HOWEVER, that no such Indebtedness may, except
    as permitted by clause (xi) of this definition and by the provisions
    described under the heading "The Exchange Offer--Certain
    Covenants--Limitation on Consolidation, Merger, etc. of Restricted
    Subsidiaries," be Incurred directly or indirectly by any other Restricted
    Subsidiary in respect of such Indebtedness pursuant to a guarantee, pledge
    of assets, assumption or otherwise or as a result of or pursuant to the
    merger or consolidation of any other Restricted Subsidiary with or into the
    Restricted Subsidiary Incurring the Indebtedness pursuant to this clause (x)
    and (B) any Refinancing Indebtedness Incurred to Refinance such
    Indebtedness;
 
        (xi) Indebtedness Incurred by any one or more Restricted Subsidiaries
    pursuant to a guarantee or assumption in respect of any Indebtedness
    (including Refinancing Indebtedness Incurred pursuant to subclause (B)
    thereof) of any other Restricted Subsidiary Incurred by such other
    Restricted Subsidiary pursuant to clause (x) of this definition; PROVIDED,
    HOWEVER, that no such Indebtedness of such other Restricted Subsidiary may
    be guaranteed or otherwise assumed pursuant to this clause (xi) unless
    either (1) at the time of such guarantee or assumption the Debt to Cash Flow
    Ratio of the Company is less than or equal to 6.0 to 1.0 or (2) at the time
    of such guarantee or assumption (after giving effect thereto) the total
    contribution to the Consolidated EBITDA of the Company (such Consolidated
    EBITDA to be calculated for purposes of this clause (xi) without giving
    effect to clause (f) of the definition of Consolidated Net Income) for the
    most recently ended fiscal quarter for which financial information is
    available ended not more than 135 days prior to the date of determination of
    the Restricted Subsidiaries which have Incurred Indebtedness or issued
    Preferred Stock pursuant to clause (x) of this definition (which such
    Indebtedness or Preferred Stock is outstanding at the time of determination)
    and of the Restricted Subsidiaries which have guaranteed or otherwise
    assumed such outstanding Indebtedness pursuant to this clause (xi) (which
    such guarantee or assumption is in effect) is not in excess of 25% of such
    Consolidated EBITDA; and
 
        (xii) Indebtedness in respect of Cash Equivalents pursuant to clause (v)
    of the definition thereof.
 
    "PERMITTED INVESTMENTS" mean, without duplication, each of the following:
 
        (a) Investments in cash (including deposit accounts with major
    commercial banks) and Cash Equivalents;
 
        (b) Investments by the Company or by any Restricted Subsidiary in any
    Person that is or will become immediately after such Investment a direct or
    indirect Wholly Owned Restricted Subsidiary;
 
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<PAGE>
    PROVIDED, HOWEVER, that (A) for purposes of calculating at any date the
    aggregate amount of Investments made since the Issue Date under the Section
    of the Indenture described under the heading "The Exchange Offer--Limitation
    on Restricted Payments", such Investment shall be a Permitted Investment
    only so long as any such Subsidiary in which the Investment has been made
    meets the conditions set forth in this clause (b), (B) no such Investment
    may be made in any Restricted Subsidiary by the Company pursuant to a
    guarantee or other assumption of such Restricted Subsidiary's Indebtedness,
    (C) no such Investment may be made in any Restricted Subsidiary by another
    Restricted Subsidiary pursuant to a guarantee or other assumption of such
    Restricted Subsidiary's Indebtedness unless permitted by clause (xi) of the
    definition of Permitted Indebtedness and (D) no Investment of properties,
    assets or contracts (other than capital contributions consisting of cash,
    hardware and equipment) may be made in any Wholly Owned Restricted
    Subsidiary that is not (or will not be as a result of, in contemplation of
    or in connection with the transaction in question) a Qualified Restricted
    Subsidiary unless at the time of such Investment either (x) the Debt to Cash
    Flow Ratio of the Company is less than or equal to 6.0 to 1.0 or (y) the
    total contribution to the Consolidated EBITDA of the Company (such
    Consolidated EBITDA to be calculated for purposes of this subclause (D) of
    this clause (b) without giving effect to clause (f) of the definition of
    Consolidated Net Income) for the most recently ended fiscal quarter for
    which financial information is available, ended not more than 135 days prior
    to the date of determination, of the Restricted Subsidiaries which are not
    Qualified Restricted Subsidiaries is not in excess of 25% of such
    Consolidated EBITDA;
 
        (c) any Investments in the Company by any Subsidiary of the Company;
    PROVIDED, HOWEVER, that any Indebtedness evidencing such Investment is
    subordinated, pursuant to a written agreement, to the Company's obligations
    in respect of the Old Notes and the Indenture;
 
        (d) Investments consisting of non-cash consideration made or held by the
    Company or by its Subsidiaries as a result of an Asset Sale made in
    compliance with the Section of the Indenture described above under the
    heading "The Exchange Offer--Limitation on Asset Sales";
 
        (e) Investments existing on the Issue Date;
 
        (f) loans and advances to employees and officers of the Company and the
    Restricted Subsidiaries made in the ordinary course of business in an
    aggregate amount outstanding at any time not to exceed $1,000,000 for all
    Investments pursuant to this clause (f);
 
        (g) accounts receivable created or acquired in the ordinary course of
    business of the Company or any Restricted Subsidiary and on ordinary
    business terms;
 
        (h) Investments arising from transactions by the Company or any
    Restricted Subsidiary with trade creditors or customers in the ordinary
    course of business (including any such Investment received pursuant to any
    plan of reorganization or similar arrangement pursuant to the bankruptcy or
    insolvency of such trade creditors or customers or otherwise in settlement
    of a claim);
 
        (i) additional Investments in an aggregate amount outstanding at any
    time not to exceed $10,000,000 for all Investments pursuant to this clause
    (i);
 
        (j) Investments in joint ventures, partnerships, or other business
    ventures in an aggregate amount outstanding at any time not to exceed
    $15,000,000 for all Investments pursuant to this clause (j);
 
        (k) loans in the ordinary course of business to employees of the Company
    to purchase Capital Stock of the Company pursuant to the terms of employee
    stock benefit plans;
 
        (l) Investments consisting of (i) licensing or sublicensing of FCC
    Licenses or intellectual property of the Company or any Restricted
    Subsidiary in the ordinary course of business, (ii) the transfer of
    equipment from the Company or any Restricted Subsidiary to any other
    Subsidiary in the
 
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    ordinary course of business, and (iii) the sharing or contribution of
    services of employees among any one or more of the Company and its
    Subsidiaries in the ordinary course of business; and
 
        (m) the sale, conveyance, transfer, lease, assignment or other
    disposition to any Restricted Subsidiary of contracts in respect of
    Qualified Projects entered into by the Company (not previously entered into
    by any Restricted Subsidiary).
 
    "PERMITTED LIENS" mean, without duplication, each of the following:
 
        (i) pledges or deposits by such Person under worker's compensation laws,
    unemployment insurance laws or similar legislation (other than the Employee
    Retirement Income Security Act of 1974, as amended), or good faith deposits
    in connection with bids, tenders, contracts (other than for the payment of
    Indebtedness) or leases to which such Person is a party, or deposits to
    secure public statutory obligations of such Person or deposits to secure
    surety or appeal bonds to which such Person is a party, or deposits as
    security for contested taxes or import duties or for the payment of rent;
 
        (ii) Liens imposed by law, such as landlords', carriers', warehousemen's
    and mechanics' Liens or bankers' Liens incurred in the ordinary course of
    business for sums which are not yet due or are being contested in good faith
    by appropriate proceedings promptly instituted and diligently conducted and
    for which adequate provision has been made;
 
       (iii) Liens for taxes not yet subject to penalties for non-payment or
    which are being contested in good faith by appropriate proceedings promptly
    instituted and diligently conducted, if adequate reserve, as may be required
    by generally accepted accounting principles, shall have been made therefor;
 
        (iv) Liens in favor of issuers of surety bonds or appeal bonds issued
    pursuant to the request of and for the account of such Person in the
    ordinary course of its business;
 
        (v) Liens to support trade letters of credit issued in the ordinary
    course of business;
 
        (vi) survey exceptions, encumbrances, easements or reservations of, or
    rights of others for, rights of way, sewers, electric lines, telegraph and
    telephone lines and other similar purposes, or zoning or other restrictions
    on the use of real property;
 
       (vii) Liens arising from judgments, decrees or attachments in
    circumstances not constituting an Event of Default;
 
      (viii) Liens in favor of the Company or any Qualified Restricted
    Subsidiary;
 
        (ix) Liens securing Acquired Indebtedness Incurred in accordance with
    the provisions of the Indenture described above under the heading "The
    Exchange Offer--Certain Covenants--Limitation on Indebtedness and Preferred
    Stock"; PROVIDED, HOWEVER, that (A) such Liens secured such Acquired
    Indebtedness at the time of and prior to the Incurrence of such Acquired
    Indebtedness by the Company and were not granted as a result of, in
    connection with or in anticipation of, the Incurrence of such Acquired
    Indebtedness by the Company and (B) such Liens do not extend to or cover any
    property or assets of the Company or of any of its Subsidiaries other than
    the property or assets that secured the Acquired Indebtedness prior to the
    time such Indebtedness became Acquired Indebtedness of the Company and are
    no more favorable to the lienholders than those securing the Acquired
    Indebtedness prior to the Incurrence of such Acquired Indebtedness by the
    Company;
 
        (x) Liens granted by the Company or by any Restricted Subsidiary to
    secure Indebtedness Incurred in accordance with the Indenture which
    Indebtedness represents all or part of the purchase price of assets or
    property acquired or constructed in the ordinary course of business after
    the Issue Date from a Person that is not an Affiliate of the Company;
    PROVIDED, HOWEVER, that (A) the aggregate amount of Indebtedness secured by
    such Liens shall not exceed the fair market value (or, if less, the cost) of
    the assets or property so acquired or constructed and (B) such Liens shall
    not encumber any
 
                                      107
<PAGE>
    other assets or property of the Company or of any Restricted Subsidiary
    (except proceeds, products, attachments and accessions) and shall attach to
    such assets or property within 120 days of the acquisition of such assets or
    property;
 
        (xi) Liens on the assets or property of a Person that becomes a
    Restricted Subsidiary after the Issue Date to the extent that such Liens are
    existing at the time such Person became a Restricted Subsidiary and were not
    granted as a result of, in connection with or in anticipation of such Person
    becoming a Restricted Subsidiary; PROVIDED, HOWEVER, that (A) the
    Indebtedness (if any) secured thereby is Incurred in accordance with the
    Indenture and (B) such Liens do not extend to or cover any assets or
    property of the Company or of any Restricted Subsidiary, other than the
    assets or property so acquired (together with proceeds and products thereof
    and attachments and accessions thereto);
 
       (xii) Liens to secure Capitalized Lease Obligations, including in respect
    of Sale and Leaseback Transactions of property or assets to the extent
    consummated in compliance with the provisions of the Indenture described
    above under the heading "The Exchange Offer--Certain Covenants--Limitation
    on Indebtedness and Preferred Stock"; PROVIDED, HOWEVER, that such Liens do
    not extend to or cover any property or assets of the Company or of any
    Restricted Subsidiary, other than the property or assets subject to such
    Capitalized Lease Obligations;
 
      (xiii) Liens in respect of Refinancing Indebtedness Incurred to Refinance
    any of the Indebtedness set forth in clauses (ix), (x), (xi), (xii) above
    and clauses (xviii), (xx), (xxi) and (xxii) below; PROVIDED, HOWEVER, that
    such Liens in respect of such Refinancing Indebtedness (A) are no less
    favorable to the Holders in any material respect and are not more favorable
    to the lienholders in any material respect with respect to such Liens than
    the Liens in respect of the Indebtedness being Refinanced and (B) do not
    extend to or cover any properties or assets of the Company or of any
    Restricted Subsidiary, other than the property or assets that secured the
    Indebtedness being Refinanced;
 
       (xiv) Liens to the extent granted or existing in respect of specific
    items of inventory or other goods and proceeds thereof of any Person
    securing such Person's Obligations in respect of bankers' acceptances
    arising in the ordinary course of business if and to the extent issued or
    created for the account of such Person to facilitate the purchase, shipment,
    or storage of such specific items of inventory or other goods;
 
       (xv) Liens in favor of the Trustee for the benefit of the Noteholders
    arising under the provisions in the Indenture section on Limitation on
    Liens;
 
       (xvi) Liens encumbering deposits made to secure obligations arising from
    statutory, regulatory, contractual or warranty requirements of the Company
    or any Restricted Subsidiary if and to the extent arising in the ordinary
    course of business, including rights of offset and set-off;
 
      (xvii) Liens securing Interest Swap Obligations which Interest Swap
    Obligations related to Indebtedness that is otherwise permitted under the
    Indenture;
 
      (xviii) Liens existing on the Issue Date to the extent and in the manner
    existing on the Issue Date;
 
       (xix) Liens arising from filing UCC financing statements for
    precautionary purposes in connection with true leases of real or personal
    property that are otherwise permitted under the Indenture and under which
    the Company or any Restricted Subsidiary is a lessee;
 
       (xx) Liens on property or assets of a Restricted Subsidiary securing
    Indebtedness Incurred by such Restricted Subsidiary in accordance with
    clause (x) of the definition of Permitted Indebtedness; PROVIDED, HOWEVER,
    that such Liens do not extend to or cover any property or assets of the
    Company or of any Restricted Subsidiary other than the property or assets of
    such Restricted Subsidiary;
 
       (xxi) Liens on property or assets of any Restricted Subsidiary that has
    Incurred Indebtedness pursuant to clause (xi) of the definition of Permitted
    Indebtedness securing such Indebtedness;
 
                                      108
<PAGE>
    PROVIDED, HOWEVER, that such Liens do not extend to or cover any other
    property or assets of the Company or any other Restricted Subsidiary;
 
      (xxii) Liens on property or assets of the Company (other than the Capital
    Stock of its Subsidiaries) securing Indebtedness Incurred under clause (ii)
    of the definition of Permitted Indebtedness; PROVIDED, HOWEVER, that such
    Liens do not extend to or cover any property or assets of any Subsidiary of
    the Company; and
 
      (xxiii) Liens consisting of pledges of the Capital Stock of Subsidiaries
    of the Company securing Indebtedness Incurred pursuant to clauses (x) and
    (xi) of the definition of Permitted Indebtedness.
 
    "PERMITTED STOCK REPURCHASE" means (1) the repurchase, redemption,
retirement or acquisition of Capital Stock, or warrants, options or rights to
acquire such Capital Stock, of the Company that is at the time of such
repurchase, redemption, retirement or acquisition held by an employee, officer
or director of the Company or any Subsidiary of the Company or a permitted
transferee or affiliate of such employee, officer or director pursuant to any
equity subscription agreement, stockholders' agreement, stock option agreement
or similar agreement, to the extent that such repurchase, redemption, retirement
or acquisition is effected upon the death, retirement or other termination of
such employee, officer or director and (2) the payment of any Indebtedness of
the Company issued to any such Person in connection with any such repurchase,
redemption, retirement or acquisition.
 
    "PERSON" means an individual, partnership, corporation, unincorporated
organization, trust or joint venture, or a governmental agency or political
subdivision thereof.
 
    "PLAN OF LIQUIDATION" means, with respect to any Person, a plan (including
by operation of law) that provides for, contemplates or the effectuation of
which is preceded or accompanied by (whether or not substantially
contemporaneously) (i) the sale, lease, conveyance, of all or substantially all
of the assets of such Person otherwise than as an entirety or substantially as
an entirety and (ii) the distribution of all or substantially all of the
proceeds of such sale, lease, conveyance, or other disposition and all or
substantially all of the remaining assets of such Person to holders of Capital
Stock of such Person.
 
    "PRODUCTIVE ASSETS" mean assets (including assets owned directly or
indirectly through Capital Stock) of a kind used or usable in the businesses of
the Company and the Restricted Subsidiaries as they are conducted on the date of
the Asset Sale.
 
    "PUBLIC EQUITY OFFERING" means a primary public offering (whether or not
underwritten, but excluding any offering pursuant to Form S-4 or S-8 under the
Securities Act) of Capital Stock (other than Disqualified Capital Stock) of the
Company pursuant to an effective registration statement under the Securities
Act.
 
    "PUBLIC MARKET" means any time after (x) a Public Equity Offering as been
consummated and (y) at least 30% of the total issued and outstanding Common
Stock of the Company has been distributed by means of an effective registration
statement under the Securities Act or sales pursuant to Rule 144 promulgated
under the Securities Act.
 
    "QUALIFIED CAPITAL STOCK" means any Capital Stock that is not Disqualified
Capital Stock.
 
    "QUALIFIED INTERCOMPANY INDEBTEDNESS" means any Indebtedness of a Restricted
Subsidiary Incurred and outstanding in accordance with clauses (vi) and (vii) of
the definition of Permitted Indebtedness (but only so long as such Indebtedness
would qualify as Permitted Indebtedness under such clause (vi) or (vii)).
 
    "QUALIFIED INTERCOMPANY PREFERRED STOCK" means Preferred Stock of a
Subsidiary of the Company for so long as such Preferred Stock is owned and held
by the Company or a Qualified Restricted Subsidiary of the Company and in each
case not subject to any Lien held by any Person other than the Company or a
Qualified Restricted Subsidiary of the Company.
 
                                      109
<PAGE>
    "QUALIFIED PROJECTS" mean projects for the development, manufacturing,
installation, operation, ownership, servicing, management, or marketing of the
Company's wireless data communications systems, or activities reasonably related
or incidental thereto.
 
    "QUALIFIED RESTRICTED SUBSIDIARY" means any Wholly Owned Restricted
Subsidiary of the Company which has not, and will not in connection with the
transaction for which the relevant determination is being made, Incurred any
Indebtedness other than Qualified Intercompany Indebtedness or issued any
Preferred Stock other than Qualified Intercompany Preferred Stock and which
Subsidiary is not, and will not in connection with the transaction for which the
relevant determination is being made become, subject to any Payment Restriction.
 
    "REFINANCE" means, in respect of any security or Indebtedness, to refinance,
extend, renew, refund, repay, prepay, redeem, defease or retire, or to issue a
security or indebtedness in exchange or replacement for, such security or
Indebtedness in whole or in part. "Refinanced" and "Refinancing" shall have
correlative meanings.
 
    "REFINANCING INDEBTEDNESS" means (A) any Indebtedness Incurred by the
Company to Refinance Indebtedness of the Company or of the Restricted
Subsidiaries or (B) any Indebtedness Incurred by any Restricted Subsidiary to
Refinance Indebtedness Incurred by such Restricted Subsidiary; PROVIDED,
HOWEVER, that such Indebtedness so Incurred to Refinance such other Indebtedness
(the "EXISTING INDEBTEDNESS") (1) is not in an aggregate principal amount as of
the date of the consummation of such proposed Refinancing in excess of (or if
such Indebtedness being Incurred to Refinance the Existing Indebtedness is
issued with original issue discount, at an original issue price not in excess
of) the sum of (i) the aggregate principal amount outstanding of the Existing
Indebtedness (PROVIDED, HOWEVER, that (a) if such Existing Indebtedness was
issued with original issue discount, in excess of the accreted amount of such
Existing Indebtedness (as determined in accordance with GAAP) as of the date of
such proposed Refinancing, (b) if such Existing Indebtedness was Incurred
pursuant to a revolving credit facility or any other agreement providing a
commitment for subsequent borrowings, with a maximum commitment under the
agreement governing the Indebtedness proposed to be Incurred not in excess of
the maximum commitment amount under such Existing Indebtedness and (c) any
amount of such Existing Indebtedness owned or held by the Company or any of its
Subsidiaries shall not be deemed to be outstanding for the purposes hereof) as
of the date of such proposed Refinancing, plus (ii) the amount of any premium
required to be paid under the terms of the instrument governing such Existing
Indebtedness, and plus (iii) the amount of reasonable expenses incurred by the
Company or such subsidiary in connection with such Refinancing and (2) does not
have (I) a Weighted Average Life to Maturity that is less than the Weighted
Average Life to Maturity of the Existing Indebtedness or (II) a final maturity
earlier than the final maturity if the Existing Indebtedness; PROVIDED, FURTHER,
HOWEVER, that (x) if such Existing Indebtedness is Indebtedness of the Company,
then such Indebtedness proposed to be Incurred to Refinance the Existing
Indebtedness shall be Indebtedness solely of the Company (it being understood
that if such Indebtedness is secured by a pledge of the Capital Stock of
Subsidiaries of the Company, such Indebtedness Incurred to Refinance the
Existing Indebtedness may likewise be secured), (y) if such Existing
Indebtedness is subordinate or junior to the Old Notes, then such Indebtedness
proposed to be Incurred to Refinance the Existing Indebtedness shall be
subordinate to the Old Notes at least to the same extent and in the same manner
as the Existing Indebtedness and (z) such Indebtedness proposed to be Incurred
to Refinance the Existing Indebtedness is not Incurred more than three months
prior to the complete retirement and defeasance of the Existing Indebtedness
with the proceeds thereof.
 
    "REGISTRATION RIGHTS AGREEMENT" means the Registration Rights Agreement
dated on or about the Issue Date between the Company and the Initial Purchaser
for the benefit of themselves and the Holders as the same may be amended from
time to time in accordance with the terms thereof.
 
                                      110
<PAGE>
    "RESTRICTED SECURITY" has the meaning assigned to such term in Rule
144(a)(3) under the Securities Act; PROVIDED, HOWEVER, that the Trustee shall be
entitled to request and conclusively rely on an Opinion of Counsel with respect
to whether any Old Note constitutes a Restricted Security.
 
    "RESTRICTED SUBSIDIARY" means any Subsidiary of the Company that is not
designated to be an Unrestricted Subsidiary pursuant to Section 4.14 of the
Indenture.
 
    "RULE 144A" means Rule 144A under the Securities Act.
 
    "S&P" means Standard & Poor's Ratings Group and its successors.
 
    "SALE AND LEASEBACK TRANSACTION" means any direct or indirect arrangement
with any Person or to which any such Person is a party providing for the leasing
pursuant to a capitalized lease to the Company or a Subsidiary of any property,
whether owned by the Company or any Subsidiary at the Issue Date or later
acquired, which has been or is to be sold or transferred by the Company or such
Subsidiary to such Person or to any other Person by whom funds have been or are
to be advanced on the security of such Property.
 
    "SECOND ISSUANCE" means the issuance of up to $90,000,000 aggregate
principal amount at maturity of Old Notes pursuant to the First Supplemental
Indenture.
 
    "SECOND ISSUANCE ISSUE DATE" means November 21, 1995, the date of original
issuance of the Initial Old Notes pursuant to the Second Issuance.
 
    "SECOND SUPPLEMENTAL INDENTURE" means the Second Supplemental Indenture to
the Indenture, dated as of August 30, 1996.
 
    "SECURITIES ACT" means the Securities Act of 1933, as amended, and the rules
and regulations of the SEC promulgated thereunder.
 
    "SUBSIDIARY," with respect to any Person, means (i) any corporation, a
majority of whose voting stock (defined as any class or classes of capital stock
having voting power under ordinary circumstances to elect a majority of the
Board of Directors) is owned, directly or indirectly, by the Company, by one or
more Subsidiaries, or by the Company and one or more Subsidiaries and (ii) any
other person (other than a corporation) in which the Company, one or more
Subsidiaries, or the Company and one or more Subsidiaries, directly or
indirectly, has at least a majority ownership interest entitled to vote in the
election of directors, managers or trustees thereof.
 
    "TAX SHARING AGREEMENT" means the Tax Sharing Agreement to be entered into
between the Company and its Subsidiaries in the form attached to the Indenture.
 
    "U.S. GOVERNMENT OBLIGATIONS" mean direct obligations of, and obligations
guaranteed by, the U.S. of America for the payment of which the full faith and
credit of the U.S. of America is pledged.
 
    "U.S. LEGAL TENDER" means such coin or currency of the U.S. of America as at
the time of payment shall be legal tender for the payment of public and private
debts.
 
    "UNRESTRICTED SUBSIDIARY" means a Subsidiary of the Company created after
the Issue Date and so designated by a resolution of the Board of Directors of
the Company pursuant to the "Limitation on Designation of Restricted and
Unrestricted Subsidiaries" covenant.
 
    "VOTING STOCK" means, with respect to any Person, securities of any class or
classes of Capital Stock of such Person entitling the holders thereof (whether
at all times or only so long as no senior class of stock has voting power by
reason of any contingency) to vote in the election of members of the Board of
Directors of such Person.
 
    "WEIGHTED AVERAGE LIFE TO MATURITY" means, when applied to any Indebtedness
at any date, the number of years obtained by dividing (a) the then outstanding
aggregate principal amount of such Indebtedness
 
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into (b) the total of the products obtained by multiplying (i) the amount of
each then remaining installment, sinking fund, serial maturity or other required
payment or principal, including payment at final maturity, in respect thereof,
by (ii) the number of years (calculated to the nearest one-twelfth) which will
elapse between such date and the making of such payment.
 
    "WHOLLY OWNED RESTRICTED SUBSIDIARY" means any Wholly Owned Subsidiary of
the Company that is a Restricted Subsidiary.
 
    "WHOLLY OWNED SUBSIDIARY" of any Person means any Subsidiary of such Person
of which all the outstanding voting securities (other than directors' qualifying
shares) which normally have the right to vote in the election of directors are
owned by such Person or any wholly owned Subsidiary of such Person.
 
                            DESCRIPTION OF NEW NOTES
 
    The terms of the New Notes will be identical in all material respects to
those of the Old Notes, except that (i) the Old Notes have not been registered
under the Securities Act, are subject to certain restrictions on transfer and
are entitled to certain registration rights under the Registration Rights
Agreement (which rights will terminate upon consummation of the Exchange Offer,
except to the extent that the Initial Purchaser may have certain registration
rights under limited circumstances) and (ii) the Old Notes provide for an
increase in the interest rate thereon pursuant to the Registration Rights
Agreement. In that regard, the Old Notes provide that, in the event that the
Exchange Offer is not consummated or a shelf registration statement (the "Shelf
Registration Statement") with respect to the resale of the Old Notes is not
declared effective on or prior to June 15, 1998, the interest rate on the Old
Notes will increase by 0.50% per annum following June 15, 1998; PROVIDED,
HOWEVER, that if the Company requests Holders of Old Notes to provide certain
information called for by the Registration Rights Agreement for inclusion in any
such Shelf Registration Statement, then the Old Notes owned by Holders who do
not deliver such information to the Company or who do not provide comments on
the Shelf Registration Statement when required pursuant to the Registration
Rights Agreement will not be entitled to any such increase in the interest rate
pursuant to the Registration Rights Agreement. The New Notes are not entitled to
any such increase in the interest rate thereon. Holders of Old Notes should
review the information set forth under "Summary--Certain Consequences of a
Failure to Exchange Old Notes" and "Summary--Terms of New Notes."
 
            CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS
 
    The following summary describes certain U.S. Federal income tax
considerations to holders of the New Notes who are subject to U.S. net income
tax with respect to the New Notes ("U.S. persons") and who will hold the New
Notes as capital assets. There can be no assurance that the U.S. Internal
Revenue Service (the "IRS") will take a similar view of the purchase, ownership
or disposition of the New Notes. This discussion is based upon the provisions of
the Internal Revenue Code of 1986, as amended, and regulations, rulings and
judicial decisions now in effect, all of which are subject to change. It does
not include any description of the tax laws of any state, local or foreign
governments or any estate or gift tax considerations that may be applicable to
the New Notes or holders thereof, it does not discuss all aspects of U.S.
Federal income taxation that may be relevant to a particular investor in light
of its particular investment circumstances or to certain types of investors
subject to special treatment under the U.S. Federal income tax laws (for
example, dealers in securities or currencies, S corporations, life insurance
companies, tax-exempt organizations, taxpayers subject to the alternative
minimum tax and non-U.S. persons) and also does not discuss the treatment of New
Notes held as a hedge against currency risks or as part of a straddle with other
investments or as part of a "synthetic security" or other integrated investment
(including a "conversion transaction") comprised of a New Note and one or more
other investments, or situations in which the functional currency of the holders
is not the U.S. dollar.
 
                                      112
<PAGE>
    Holders of Old Notes contemplating acceptance of the Exchange Offer should
consult their own tax advisors with respect to their particular circumstances
and with respect to the effects of state, local or foreign tax laws to which
they may be subject.
 
EXCHANGE OF NOTES
 
    The exchange of the Old Notes for the New Notes should not be a taxable
event to Holders for federal income tax purposes. The exchange of the Old Notes
for the New Notes pursuant to the Exchange Offer should not be treated as an
"exchange" for federal income tax purposes because the New Notes should not be
considered to differ materially in kind or extent from the Old Notes. If,
however, the exchange of the Old Notes for the New Notes were treated as an
exchange for federal income tax purposes, such exchange should constitute a
recapitalization for federal income tax purposes. Accordingly, a holder should
have the same adjusted basis and holding period in the New Notes as it had in
the Old Notes immediately before the exchange.
 
INTEREST ON THE NEW NOTES
 
    A holder of a New Note will be required to report as ordinary interest
income for U.S. Federal income tax purposes interest earned on the New Note in
accordance with the holder's method of tax accounting.
 
DISPOSITION OF NEW NOTES
 
    A holder's tax basis for a New Note generally will be the holder's purchase
price for the Old Note. Upon the sale, exchange, redemption, retirement or other
disposition of a New Note, a holder will recognize gain or loss equal to the
difference (if any) between the amount realized and the holder's tax basis in
the New Note. Such gain or loss will be long-term capital gain or loss if the
New Note has been held for more than one year and otherwise will be short-term
capital gain or loss (with certain exceptions to the characterization as capital
gain if the New Note was acquired at a market discount).
 
BACKUP WITHHOLDING
 
    A holder of a New Note may be subject to backup withholding at the rate of
31% with respect to interest paid on the New Note and proceeds from the sale,
exchange, redemption or retirement of the New Note, unless such holder (a) is a
corporation or comes within certain other exempt categories and, when required,
demonstrates that fact or (b) provides a correct taxpayer identification number,
certifies as to no loss of exemption from backup withholding and otherwise
complies with applicable requirements of the backup withholding rules. A holder
of a New Note who does not provide the Company with its correct taxpayer
identification number may be subject to penalties imposed by the IRS.
 
    A holder of a New Note who is not a U.S. person will generally be exempt
from backup withholding and information reporting requirements, but may be
required to comply with certification and identification procedures in order to
obtain an exemption from backup withholding and information reporting.
 
    Any amount paid as backup withholding will be creditable against the
holder's U.S. Federal income tax liability.
 
                              PLAN OF DISTRIBUTION
 
    Each broker-dealer that receives New Notes for its own account in connection
with the Exchange Offer must acknowledge that it will deliver a prospectus in
connection with any resale of such New Notes. This Prospectus, as it may be
amended or supplemented from time to time, may be used by Participating
Broker-Dealers during the period referred to below in connection with resales of
the New Notes received in exchange for Old Notes if such Old Notes were acquired
by such Participating Broker-Dealers for their
 
                                      113
<PAGE>
own accounts as a result of market making activities or other trading
activities. The Company has agreed that this Prospectus, as it may be amended or
supplemented from time to time, may be used by a Participating Broker-Dealer in
connection with resales of such New Notes for a period ending 90 days after the
Expiration Date (subject to extension under certain limited circumstances
described herein) or, if earlier, when all such New Notes have been disposed of
by such Participating Broker-Dealer. See "The Exchange Offer--Terms of the
Exchange Offer."
 
    The Company will not receive any cash proceeds from the issuance of the New
Notes offered hereby. New Notes received by broker-dealers for their own
accounts in connection with the Exchange Offer may be sold from time to time in
one or more transactions in the over-the-counter market, in negotiated
transactions, through the writing of options on the New Notes or a combination
of such methods of resale, at market prices prevailing at the time of resale, at
prices related to such prevailing market prices or at negotiated prices. Any
such resale may be made directly to purchasers or to or through brokers or
dealers who may receive compensation in the form of commissions or concessions
from any such broker-dealer and/or the purchasers of any such New Notes. Any
broker-dealer that resells New Notes that were received by it for its own
account in connection with the Exchange Offer and any broker or dealer that
participates in a distribution of such New Notes may be deemed to be an
"underwriter" within the meaning of the Securities Act, and any profit on any
such resale of New Notes and any commissions or concessions received by any such
persons may be deemed to be underwriting compensation under the Securities Act.
The Letter of Transmittal states that by acknowledging that it will deliver and
by delivering a prospectus, a broker-dealer will not be deemed to admit that it
is an "underwriter" within the meaning of the Securities Act.
 
                                 LEGAL MATTERS
 
    The validity of the New Notes offered hereby will be passed upon for the
Company by Wilson Sonsini Goodrich & Rosati, Professional Corporation, Palo
Alto, California. As of the date of this Prospectus, certain members of Wilson
Sonsini Goodrich & Rosati, Professional Corporation and investment partnerships
of which such persons are partners beneficially own 23,428 shares of the
Company's Common Stock.
 
                                    EXPERTS
 
    The consolidated financial statements as of December 31, 1994 and 1995 and
for each of the three years in the period ended December 31, 1995 included in
this Prospectus and the related financial statement schedule appearing elsewhere
in this Registration Statement have been audited by Deloitte & Touche LLP,
independent auditors, as stated in their reports appearing herein, and have been
so included in reliance upon the reports of such firm given upon their authority
as experts in accounting and auditing.
 
                                      114
<PAGE>
                                    GLOSSARY
 
<TABLE>
<CAPTION>
TERM                                                                        DEFINITION
- ----------------------------------------------  ------------------------------------------------------------------
<S>                                             <C>
Applications..................................  Software programs that enable computers to perform tasks such as,
                                                in the case of utility applications, metering, load management,
                                                load research, and distribution automation.
 
Automated Meter Reading ("AMR")...............  Use of hand-held or drive-by automated meter reading equipment.
 
Bandwidth.....................................  The amount of message traffic a given medium can accommodate at
                                                one time. Bandwidth may refer to analog or digital data.
 
Capacity......................................  For electric utility purposes, a measure (in watts) of the ability
                                                to produce, transport or store electricity at any instant rather
                                                than over time.
 
CellMaster....................................  The communications gateway between the System Controller and the
                                                MCCs and RTUs. The CellMaster can connect to the System Controller
                                                via modem over a leased line or via privately-owned communications
                                                media such as microwave channels or fiber optic transmission
                                                lines. CellNet's 9QPR cellular radio provides the connection
                                                between the CellMaster and the MCCs and RTUs.
 
CellNet-Registered Trademark- System..........  CellNet's wireless data communications system, which provides NMR
                                                services, control and monitoring of the power distribution
                                                network, and other services. The CellNet system concurrently
                                                supports multiple utility applications, including distribution
                                                automation and demand-side management.
 
Cellular Digital Packet Data ("CDPD").........  A method of transmitting data over a cellular communications
                                                network using underutilized radio frequency or pauses in voice
                                                communication.
 
Demand........................................  For electric utility purposes, the rate at which electric energy
                                                is delivered to or used by a system, part of a system, or piece of
                                                equipment at a given instant, or averaged over a designated
                                                period. Measured in kilowatts.
 
Distribution Automation.......................  Any program used by an electric utility to monitor, coordinate and
                                                operate distribution components in a real-time mode from remote
                                                locations.
 
Distribution Network..........................  The utility's wiring grid between the substation and customer
                                                sites.
 
Gateway.......................................  The connection between two computer networks. CellNet uses a
                                                gateway to connect a SCADA system to other computers for billing
                                                and other applications.
 
Leased Line...................................  A dedicated telephone line connecting two or more fixed locations.
                                                CellNet may use a leased line or radio links to connect a
                                                CellMaster and System Controller.
</TABLE>
 
                                      A-1
<PAGE>
<TABLE>
<CAPTION>
TERM                                                                        DEFINITION
- ----------------------------------------------  ------------------------------------------------------------------
<S>                                             <C>
Load..........................................  For electric utility purposes, the amount of electric power
                                                delivered or required at any specific point or points of a system.
 
Load Control..................................  The capability to manage electric power consumption by controlling
                                                the use of equipment and appliances. Typically used by a utility
                                                to avoid either a brownout or the necessity of generating
                                                high-cost electricity.
 
Load Profile..................................  A record of a customer's electricity use over time in discrete
                                                intervals. Utility companies use this data to analyze consumption,
                                                to calculate demand or time-of-use data and to detect power theft
                                                and meter tampering.
 
Local Area Network ("LAN")....................  In the CellNet system, the LAN connects MCCs to radios in endpoint
                                                devices.
 
MAS...........................................  Multiple address system, a form of radio communication system.
 
Micro Cell Controller ("MCC").................  A device which manages endpoint devices in a local coverage area
                                                (as part of a LAN), collects and processes data transmissions from
                                                such endpoint devices and transmits such data to a CellMaster.
 
Network Meter Reading ("NMR").................  Fully-automated meter reading on a network.
 
Network Operating System ("NOS")..............  A Network Operating System is the software that supports the
                                                operation of distributed applications with communications,
                                                database capabilities, and common Applications Programming
                                                Interfaces (APIs).
 
Node..........................................  In the CellNet's system, a node is an internet addressable,
                                                responsive, computer-based subsystem (for example, a System
                                                Controller workstation or a MCC) that is able to take part in
                                                internetworking activities.
 
Object-oriented...............................  An adjective that describes a method of software analysis, design,
                                                and/or programming that facilitates sophisticated problem-solving.
                                                Object-oriented systems are flexible and maintainable because of
                                                their natural way of handling user-oriented systems and
                                                consistent, powerful, underlying representation for what is to be
                                                built and how it will be built. The CellNet system is built on an
                                                object-oriented, distributed infrastructure.
 
Packet........................................  A block of data preceded by, and perhaps followed by, one or more
                                                bytes of information specific to the communications service (a
                                                communications protocol) used to transmit the packet.
 
Personal Communications Services ("PCS")......  Digital wireless communications services which are expected to use
                                                a microcell technology and operate at a higher frequency than
                                                cellular systems.
</TABLE>
 
                                      A-2
<PAGE>
<TABLE>
<CAPTION>
TERM                                                                        DEFINITION
- ----------------------------------------------  ------------------------------------------------------------------
<S>                                             <C>
Protocol......................................  Rules and conventions that govern communication between OSI model
                                                layers and, in the CellNet system, subsystems for functions such
                                                as format, timing, sequencing, and error control.
 
Remote Terminal Unit ("RTU")..................  Device typically used to monitor and control components of a
                                                utility's distribution network. The RTU combines digital and
                                                analog inputs, which are used to obtain detailed information about
                                                the distribution equipment being monitored. An RTU can sense
                                                remotely such things as current, temperature and power factor.
 
RF............................................  Radio Frequency
 
Specialized Mobile Radio ("SMR")..............  A two way radio service operating in the 800-900 megahertz band.
                                                FCC restrictions on use of this bandwidth for taxi dispatchers and
                                                similar vehicle fleet operators have been relaxed, allowing
                                                holders of these frequency licenses to expand into cellular-like
                                                services.
 
Spread Spectrum...............................  A modulation technique in which a signal is broadcast over a range
                                                of frequencies to minimize noise and interference.
 
Time-of-Use ("TOU")...........................  Time-of-use metering allows a utility to bill electric power usage
                                                at different rates, according to the time that the power was
                                                consumed.
 
Wide Area Network ("WAN").....................  In the CellNet system the WAN connects the CellMasters to the MCCs
                                                in a given service area.
</TABLE>
 
                                      A-3
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                                                               PAGE
                                                                                                             ---------
<S>                                                                                                          <C>
Independent Auditors' Report...............................................................................        F-2
 
Consolidated Balance Sheets as of December 31, 1994 and 1995 and June 30, 1996 (unaudited).................        F-3
 
Consolidated Statements of Operations for the years ended December 31, 1993, 1994 and 1995 and the six
  months ended June 30, 1995 and 1996 (unaudited)..........................................................        F-4
 
Consolidated Statements of Stockholders' Equity (Deficit) for the years ended December 31, 1993, 1994 and
  1995 and the six months ended June 30, 1996 (unaudited)..................................................        F-5
 
Consolidated Statements of Cash Flows for the years ended December 31, 1993, 1994 and 1995 and the six
  months ended June 30, 1995 and 1996 (unaudited)..........................................................        F-6
 
Notes to Consolidated Financial Statements.................................................................        F-7
</TABLE>
 
                                      F-1
<PAGE>
                          INDEPENDENT AUDITORS' REPORT
 
CellNet Data Systems, Inc.:
 
    We have audited the accompanying consolidated balance sheets of CellNet Data
Systems, Inc. and subsidiaries (the "Company") as of December 31, 1994 and 1995,
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, 1995. 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 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, such consolidated financial statements present fairly, in
all material respects, the financial position of CellNet Data Systems, Inc. and
subsidiaries at December 31, 1994 and 1995, and the results of their operations
and their cash flows for each of the three years in the period ended December
31, 1995 in conformity with generally accepted accounting principles.
 
DELOITTE & TOUCHE LLP
 
San Jose, California
February 9, 1996
(April 11, 1996 as to the last sentence of the
second paragraph of Note 5 and
October 31, 1996 as to Note 10)
 
                                      F-2
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
                          CONSOLIDATED BALANCE SHEETS
                       (IN THOUSANDS, EXCEPT SHARE DATA)
                                     ASSETS
 
<TABLE>
<CAPTION>
                                             DECEMBER 31,                    PRO FORMA
                                          ------------------   JUNE 30,       JUNE 30,
                                            1994      1995       1996           1996
                                          --------  --------  -----------   ------------
                                                              (UNAUDITED)   (UNAUDITED)
                                                                              (NOTE 1)
<S>                                       <C>       <C>       <C>           <C>
Current Assets:
  Cash and cash equivalents.............  $ 12,503  $ 48,018   $  70,730     $  71,921
  Short-term investments................    12,005    95,779      32,237        32,237
  Accounts receivable...................       703     2,118       1,904         1,904
  Prepaid expenses and other............       248       940         886           886
                                          --------  --------  -----------   ------------
    Total current assets................    25,459   146,855     105,757       106,948
Network Components and Inventory........     2,146    11,664      12,569        12,569
Networks in Progress....................     1,333    12,602      29,850        29,850
Property--net...........................     2,871     7,539       9,129         9,129
Debt Issuance Costs--net................     --        5,646       5,348         5,348
                                          --------  --------  -----------   ------------
  Total assets..........................  $ 31,809  $184,306   $ 162,653     $ 163,844
                                          --------  --------  -----------   ------------
                                          --------  --------  -----------   ------------
 
     LIABILITIES, REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' DEFICIT
Current Liabilities:
  Accounts payable......................  $  2,050  $  7,241   $   6,329     $   6,329
  Accrued compensation and related
    benefits............................       402     1,353         735           735
  Accrued liabilities...................       889       981         990           990
  Current portion of capital leases.....       384       280         296           296
                                          --------  --------  -----------   ------------
    Total current liabilities:               3,725     9,855       8,350         8,350
                                          --------  --------  -----------   ------------
Senior Discount Notes--13%..............     --      182,528     194,720       194,720
                                          --------  --------  -----------   ------------
Capital Lease Obligations--net..........       162       540         497           497
                                          --------  --------  -----------   ------------
Commitments and Contingencies (Notes 1
  and 9)
Series CC Redeemable Convertible
  Preferred Stock--$.001 par value;
  3,215,768 shares designated and
  outstanding and none on a pro forma
  basis; aggregate liquidation value of
  $31,000,000...........................    29,486    29,486      29,486        --
                                          --------  --------  -----------   ------------
 
Stockholders' Equity (deficit):
  Convertible preferred stock--$.001 par
    value; 15,000,000 shares authorized;
    shares outstanding, 1994: 9,008,518;
    1995: 9,136,675; 1996: 9,137,078; no
    shares outstanding on a pro forma
    basis; aggregate liquidation value
    of $27,812,000......................    25,990    27,195      27,196        --
  Common stock--$.001 par value;
    50,000,000 shares authorized; shares
    outstanding: 1994, 2,716,166; 1995,
    5,034,262; 1996, 5,209,472 and
    33,924,958 on a pro forma basis.....    26,790    27,608      27,636        88,484
  Notes receivable from sale of common
    stock...............................      (284)     (866)       (866)         (866)
  Warrants..............................        10     2,984       2,984             9
  Accumulated deficit...................   (54,065)  (95,021)   (127,334)     (127,334)
  Net unrealized loss on short-term
    investments.........................        (5)       (3)        (16)          (16)
                                          --------  --------  -----------   ------------
    Total stockholders' deficit.........    (1,564)  (38,103)    (70,400)      (39,723)
                                          --------  --------  -----------   ------------
Total liabilities and stockholders'
  deficit...............................  $ 31,809  $184,306   $ 162,653     $ 163,844
                                          --------  --------  -----------   ------------
                                          --------  --------  -----------   ------------
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-3
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                        SIX MONTHS ENDED
                                            YEAR ENDED DECEMBER 31,         JUNE 30,
                                          ---------------------------  ------------------
                                           1993      1994      1995      1995      1996
                                          -------  --------  --------  --------  --------
                                                                          (UNAUDITED)
<S>                                       <C>      <C>       <C>       <C>       <C>
Revenues:
  Product sales.........................  $ 1,757  $  1,447  $  1,663  $    938  $    127
  Network service revenues..............    --        --           35     --          244
  Other revenues........................    --          204       428       353        49
                                          -------  --------  --------  --------  --------
    Total revenues......................    1,757     1,651     2,126     1,291       420
                                          -------  --------  --------  --------  --------
Costs and expenses:
  Cost of product sales.................    1,840     1,191     1,294       598       109
  Cost of network operations............    --        --        3,835     1,333     3,374
  Research and development..............    5,262     9,693    22,380     6,735    13,009
  Marketing and sales...................    1,447     3,257     4,201     1,946     2,924
  General and administrative............    1,450     2,583     6,805     2,874     5,412
                                          -------  --------  --------  --------  --------
    Total costs and expenses............    9,999    16,724    38,515    13,486    24,828
                                          -------  --------  --------  --------  --------
Loss from operations....................   (8,242)  (15,073)  (36,389)  (12,195)  (24,408)
Other income (expense):
  Interest income.......................       66       555     4,590       860     3,458
  Interest expense......................     (198)     (101)   (9,320)     (754)  (11,264)
  Other--net............................      (16)      (13)      166       (31)      (97)
                                          -------  --------  --------  --------  --------
Total other income (expense)............     (148)      441    (4,564)       75    (7,903)
                                          -------  --------  --------  --------  --------
Loss before income taxes................   (8,390)  (14,632)  (40,953)  (12,120)  (32,311)
Provision for income taxes..............        1         2         3         1         2
                                          -------  --------  --------  --------  --------
Net loss................................  $(8,391) $(14,634) $(40,956) $(12,121) $(32,313)
                                          -------  --------  --------  --------  --------
                                          -------  --------  --------  --------  --------
Pro forma net loss per share............                     $  (1.22) $  (0.37) $  (0.94)
                                                             --------  --------  --------
                                                             --------  --------  --------
Shares used in computing pro forma net
  loss per share........................                       33,497    32,817    34,483
                                                             --------  --------  --------
                                                             --------  --------  --------
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-4
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
           CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)
                       (IN THOUSANDS, EXCEPT SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                                             NET
                              CONVERTIBLE                            NOTES                               UNREALIZED
                            PREFERRED STOCK       COMMON STOCK     RECEIVABLE                              LOSS ON
                           ------------------  ------------------  FROM SALE               ACCUMULATED   SHORT-TERM
                            SHARES    AMOUNT    SHARES    AMOUNT    OF STOCK    WARRANTS     DEFICIT     INVESTMENTS    TOTAL
                           ---------  -------  ---------  -------  ----------   --------   -----------   -----------   --------
<S>                        <C>        <C>      <C>        <C>      <C>          <C>        <C>           <C>           <C>
BALANCES, January 1,
  1993...................  4,244,858  $4,181     895,492  $26,616    $--         $    9     $ (31,040)     -$-         $   (234)
Sales of Series AA
  preferred stock (less
  issuance costs of
  $8)....................    755,142     747      --        --       --           --           --          --               747
Exercise of stock
  options................     --        --       886,618      46     --           --           --          --                46
Conversion of
  subordinated debt
  ($3,242) and accrued
  interest ($32) into
  Series BB preferred
  stock and warrants.....    689,190   3,274      --        --       --           --           --          --             3,274
Sale of Series BB
  preferred stock and
  warrants (less issuance
  costs of $504).........  2,748,020  12,549      --        --       --           --           --          --            12,549
Sales of Series BB
  preferred stock for
  notes receivable.......     52,635     250      --        --        (250)       --           --          --             --
Sale of common stock
  (less issuance costs of
  $1)....................     --        --       400,400      19     --           --           --          --                19
Sale of stock warrants...     --        --        --        --       --               1        --          --                 1
Net loss.................     --        --        --        --       --           --           (8,391)     --            (8,391)
                           ---------  -------  ---------  -------    -----      --------   -----------       ---       --------
BALANCES, December 31,
  1993...................  8,489,845  21,001   2,182,510  26,681      (250)          10       (39,431)     --             8,011
Exercise of stock options
  and restricted stock
  purchase...............     --        --       533,656     109      (100)       --           --          --                 9
Sale of Series DD
  preferred stock (net of
  issuance costs of
  $10)...................    518,673   4,989      --        --       --           --           --          --             4,989
Collection of notes
  receivable.............     --        --        --        --          66        --           --          --                66
Net unrealized loss on
  short-term
  investments............     --        --        --        --       --           --           --             (5)            (5)
Net loss.................     --        --        --        --       --           --          (14,634)     --           (14,634)
                           ---------  -------  ---------  -------    -----      --------   -----------       ---       --------
BALANCES, December 31,
  1994...................  9,008,518  25,990   2,716,166  26,790      (284)          10       (54,065)        (5)        (1,564)
Sale of Series DD
  preferred stock (net of
  issuance costs of
  $31)...................    128,157   1,205      --        --       --           --           --          --             1,205
Exercise of stock options
  and restricted stock
  purchases..............     --        --     2,318,096     818      (628)       --           --          --               190
Common stock warrants
  issued in connection
  with senior discount
  notes..................     --        --        --        --       --           2,974        --          --             2,974
Collection of notes
  receivable.............     --        --        --        --          46        --           --          --                46
Net unrealized gain on
  short-term
  investments............     --        --        --        --       --           --           --              2              2
Net loss.................     --        --        --        --       --           --          (40,956)     --           (40,956)
                           ---------  -------  ---------  -------    -----      --------   -----------       ---       --------
BALANCES, December 31,
  1995...................  9,136,675  27,195   5,034,262  27,608      (866)       2,984       (95,021)        (3)       (38,103)
Exercise of stock options
  and warrants*..........        403       1     175,210      28     --           --           --          --                29
Net unrealized loss on
  short-term
  investments*...........     --        --        --        --       --           --           --            (13)           (13)
Net loss*................     --        --        --        --       --           --          (32,313)     --           (32,313)
                           ---------  -------  ---------  -------    -----      --------   -----------       ---       --------
BALANCES, June 30,
  1996*..................  9,137,078  $27,196  5,209,472  $27,636    $(866)      $2,984     $(127,334)      $(16)      $(70,400)
                           ---------  -------  ---------  -------    -----      --------   -----------       ---       --------
                           ---------  -------  ---------  -------    -----      --------   -----------       ---       --------
</TABLE>
 
- ------------------------------
 
*Unaudited
 
          See accompanying notes to consolidated financial statements.
 
                                      F-5
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                          YEAR ENDED               SIX MONTHS ENDED
                                                                         DECEMBER 31,                  JUNE 30,
                                                                -------------------------------  --------------------
                                                                  1993       1994       1995       1995       1996
                                                                ---------  ---------  ---------  ---------  ---------
                                                                                                     (UNAUDITED)
<S>                                                             <C>        <C>        <C>        <C>        <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net loss....................................................  $  (8,391) $ (14,634) $ (40,956) $ (12,121) $ (32,313)
  Adjustments to reconcile net loss to net cash used for
    operating activities:
    Depreciation and amortization.............................        699        992      2,295        917      2,257
    Amortization of discount on 13% senior notes..............     --         --          9,665     --         12,192
    Amortization of debt issuance costs.......................     --         --            256         17        298
    Deferred rent.............................................       (115)       (43)       (46)        22         21
    Loss (gain) on disposition of property....................          1          2         57         14        (15)
    Changes in:
      Accounts receivable.....................................       (293)      (282)    (1,415)       208        214
      Prepaid expenses and other..............................        (93)      (126)      (692)      (668)        54
      Network components and inventory........................       (574)    (1,260)    --         --         --
      Accounts payable........................................        348      1,389      5,191      2,394       (912)
      Accrued compensation and related benefits...............     --         --            951        268       (618)
      Accrued liabilities.....................................       (673)      (676)       138        496        (12)
                                                                ---------  ---------  ---------  ---------  ---------
        Net cash used for operating activities................     (9,091)   (14,638)   (24,556)    (8,453)   (18,834)
                                                                ---------  ---------  ---------  ---------  ---------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Network components and inventory............................     --         --         (9,518)    (3,597)      (905)
  Networks in progress........................................     --         (1,333)   (11,269)    (2,467)   (17,482)
  Purchase of property........................................       (535)    (2,436)    (6,222)    (3,009)    (3,478)
  Other assets................................................         73     --         --         --         --
  Purchase of short-term investments..........................     (2,962)   (12,548)  (285,802)   (41,890)  (263,980)
  Proceeds from sales and maturities of short-term
    investments...............................................     --          3,500    202,030     14,317    327,522
                                                                ---------  ---------  ---------  ---------  ---------
        Net cash provided by (used for) investing
          activities..........................................     (3,424)   (12,817)  (110,781)   (36,646)    41,677
                                                                ---------  ---------  ---------  ---------  ---------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Issuance of senior discount notes and related stock
    warrants..................................................     --         --        175,837    125,894     --
  Cash paid for debt issuance costs...........................     --         --         (5,902)    (4,034)    --
  Subordinated debt borrowings................................      3,242        350     --         --         --
  Repayment of debt obligations...............................       (403)      (511)      (524)      (313)      (160)
  Proceeds from sale of preferred stock.......................     13,296     34,122      1,205      1,205          1
  Proceeds from sale of common stock..........................         66          9        190         14         28
  Collection of notes receivable from sale of common stock....     --             66         46         46     --
                                                                ---------  ---------  ---------  ---------  ---------
        Net cash provided by (used for) financing
          activities..........................................     16,201     34,036    170,852    122,812       (131)
                                                                ---------  ---------  ---------  ---------  ---------
INCREASE IN CASH AND CASH EQUIVALENTS.........................      3,686      6,581     35,515     77,713     22,712
CASH AND CASH EQUIVALENTS, Beginning of period................      2,236      5,922     12,503     12,503     48,018
                                                                ---------  ---------  ---------  ---------  ---------
CASH AND CASH EQUIVALENTS, End of period......................  $   5,922  $  12,503  $  48,018  $  90,216  $  70,730
                                                                ---------  ---------  ---------  ---------  ---------
                                                                ---------  ---------  ---------  ---------  ---------
SUPPLEMENTAL NONCASH INVESTING AND FINANCING ACTIVITIES:
  Conversion of subordinated debt and accrued interest into
    preferred stock...........................................  $   3,274  $     353  $  --      $  --      $  --
  Acquisition of property under capital leases................  $      17  $     232  $     798  $     348  $     133
  Sale of common stock for notes receivable...................  $     250  $     100  $     628  $     200  $  --
 
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
  Cash paid during the period for interest....................  $     166  $     101  $     113  $      44  $      56
  Cash paid for income taxes..................................  $       1  $       2  $       3  $       1  $       2
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-6
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
1. NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES
 
    NATURE OF OPERATIONS--Since 1993, CellNet Data Systems, Inc. and
subsidiaries (the "Company") has focused substantially all of its resources and
efforts on the development of the CellNet wireless data communication system to
provide automated network meter reading and other services to the utility
industry and to providers of non-utility services. The Company's primary
activities since 1993 have included research and development, prototype product
development, field testing, commercial network installation, and provision of
wireless data communication services, in connection with the development and
deployment of its CellNet wireless data communication system.
 
    The Company is in the process of progressively installing its network for
Kansas City Power & Light Company and commenced the installation of its network
for Union Electric Company in the first quarter of 1996. Management plans to
significantly increase operations through the roll-out of additional
installations for other utility companies and intends to fund these operations
through additional debt and equity financing arrangements.
 
    The Company provides its services to utility companies under long-term
contracts by which the Company is obligated to provide meter reading and related
services over the term of the contract. The length of the contracts vary and can
include renewal options under which the Company's commitments under the contract
could exceed 20 years, although there is no assurance that such options would be
exercised, or that contract termination clauses would not be exercised. Renewal
options generally contain terms which are substantially similar to the original
service agreements. Contract termination clauses generally provide for defined
payments intended to cover remaining network asset values.
 
    CONSOLIDATION--The accompanying consolidated financial statements include
the accounts of CellNet Data Systems, Inc. and its wholly-owned subsidiaries.
All material intercompany accounts and transactions are eliminated in
consolidation.
 
    FINANCIAL STATEMENT 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,
liabilities, revenues and expenses during the reporting period. Such estimates
include the level of the allowance for potentially uncollectible accounts
receivable, reserves for network components and inventory that are obsolete,
slow moving or nonsalable, evaluation of network assets for impairment, accrued
liabilities and a valuation allowance for net deferred tax assets. Actual
results could differ from these estimates.
 
    CASH EQUIVALENTS--Cash equivalents are highly liquid debt instruments
acquired with an original maturity of three months or less. The recorded
carrying amounts of the Company's cash and cash equivalents approximate their
fair market value.
 
    SHORT-TERM INVESTMENTS--Short-term investments represent debt and equity
securities which are stated at fair value. All short-term investments are
classified as available-for-sale. Any temporary difference between an
investment's amortized cost and its market value is recorded as a separate
component of stockholders' deficit until such gains or losses are realized.
Gains or losses on the sale of securities are computed using the specific
identification method.
 
                                      F-7
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
1. NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
    The Company adopted Statement of Financial Accounting Standards (SFAS) No.
115, "Accounting for Certain Investments in Debt and Equity Securities," in
1994. The adoption of this standard did not have a significant effect in the
Company's financial position or results of operations.
 
    CUSTOMER CONCENTRATION AND CONCENTRATION OF CREDIT RISK--Financial
instruments that potentially subject the Company to credit risk consist
principally of cash and cash equivalents, short-term investments and accounts
receivable. The Company sells its products and services to, and installs its
networks primarily for utility companies in the United States. To reduce credit
risk related to accounts receivable, the Company periodically evaluates its
customers' financial condition. Collateral is generally not required. Reserves
are maintained for credit losses, but the Company historically has not
experienced any significant losses related to individual customers or groups of
customers in any particular geographical area. One utility represented 29% and
73% of revenues for the year ended December 31, 1995 and the six months ended
June 30, 1996, respectively and 60% and 27% of accounts receivable at the end of
the respective periods. Another utility accounted for 23% of accounts receivable
at June 30, 1996. Another utility represented 18%, 58%, 64% and 16% of revenues
for the years ended December 31, 1993, 1994 and 1995 and the six months ended
June 30, 1996, respectively and 34% of accounts receivable at December 31, 1994.
Another utility represented 37% and 10%, and an additional utility represented
36% and 14% of revenues for the years ended December 31, 1993 and 1994,
respectively.
 
    The Company invests in a variety of financial instruments such as commercial
paper, debt securities of the U.S. government, foreign debt securities and
preferred stock. The Company's policy limits the amount of credit exposure with
any one financial instrument or commercial issuer. All such instruments are
rated by Standard and Poors as A- or higher. The Company also places its
investments for safekeeping with high-credit-quality financial institutions.
 
    NETWORK COMPONENTS AND INVENTORY--Network components and inventory are
stated at the lower of cost (first-in, first-out method) or market. At December
31, 1995 and June 30, 1996, such network components and inventory consisted
primarily of purchased and in process materials to be included in the Company's
installed networks and also for product sales. Network components, upon
completion of assembly, are either sold to customers or transferred to a
particular network location and included in networks in progress.
 
    NETWORKS IN PROGRESS--Networks in progress, which are stated at cost,
include both equipment assembled at the Company and systems partially installed
at customer sites. Interest is capitalized using the Company's cost of capital
until the point in the installation process at which each network begins
generating revenue. Accordingly, $458,000 of interest was capitalized during
1995 and $983,000 of interest was capitalized for the six months ended June 30,
1996. Depreciation is computed on a straight-line basis over the shorter of the
estimated useful lives of the network assets or the expected minimum period of
revenue generation under the related contract (estimated to be approximately ten
years).
 
    PROPERTY--Property is stated at cost. Depreciation and amortization are
computed on a straight-line basis over estimated useful lives of three to five
years or the capital lease term, if shorter.
 
                                      F-8
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
1. NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
    DEBT ISSUANCE COST is comprised of debt issue costs associated with the
Senior Discount Notes (see Note 5). These costs are capitalized and amortized
using the effective interest method over the lives of the related debt.
 
    RECENTLY ISSUED ACCOUNTING STANDARDS--In October 1995, the Financial
Accounting Standards Board (FASB) issued SFAS No. 123, "Accounting for
Stock-Based Compensation." The new standard defines a fair value method of
accounting for stock options and other equity instruments. The new standard
permits companies to continue to account for equity transactions with employees
under existing accounting rules but requires disclosure in a note to the
financial statements of the pro forma net income as if the Company had applied
the new method of accounting. The Company intends to follow the disclosure
alternative for its employee stock plans at December 31, 1996. Adoption of the
new standard will not impact reported earnings and will have no effect on the
Company's cash flows.
 
    In March 1995, the FASB issued SFAS No. 121, "Accounting for the Impairment
of Long-Lived Assets to be Disposed Of," which became effective January 1, 1996.
This statement requires the Company to review long-lived assets for impairment
whenever events or changes in circumstances indicate that the carrying amount of
an asset may not be recovered. Implementation did not have a material impact on
the Company's financial statements.
 
    REVENUE RECOGNITION--Network service revenue, associated with installed
networks, is recognized in the period of service. Product sales are recognized
upon product shipment. Estimated warranty costs are recorded at the time the
product sales are recognized.
 
    RESEARCH AND DEVELOPMENT--Research and development costs are expensed as
incurred. The Company's networks include certain software applications which are
integral to their operation. The costs to develop such software have not been
capitalized as the Company believes its software development processes are
essentially completed concurrent with the establishment of technological
feasibility of the software and/or development of the related network hardware.
 
    FOREIGN CURRENCY TRANSLATION--The functional currency of the Company's U.K.
subsidiary is the U.S. dollar. Accordingly, all monetary assets and liabilities
are translated at the current exchange rate at the end of the period,
nonmonetary assets and liabilities are translated at historical rates and
operating expenses are translated at average exchange rates in effect during the
period. Transaction gains and losses, which are included in other income
(expense) in the accompanying consolidated statements of operations, have not
been significant.
 
    FAIR VALUE OF FINANCIAL INSTRUMENTS--The recorded carrying amounts of the
Company's financial instruments, namely cash and cash equivalents and short-term
investments, approximate their fair value. The estimated fair value of the
Company's Senior Discount Notes was $179,563,000 at December 31, 1995 and
$212,469,000 at June 30, 1996. The fair values of cash equivalents and
short-term investments are based on quoted market prices and the estimated fair
value of the Senior Discount Notes is based on information provided by the
initial purchaser of the original notes.
 
    PRO FORMA NET LOSS PER SHARE--Pro forma net loss per share is computed using
the weighted average number of common and common equivalent shares outstanding
during the period. Common equivalent
 
                                      F-9
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
1. NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
shares include preferred stock and certain warrants (using the "if converted"
method) and stock options and the remaining warrants (using the treasury stock
method). Common equivalent shares are excluded from the computation if their
effect is anti-dilutive, except that, pursuant to the Securities and Exchange
Commission's Staff Accounting Bulletins and staff policy, such computations
include all common and common equivalent shares issued within the 12 months
preceding the initial filing date as if they were outstanding for all periods
presented. In addition, all outstanding preferred stock that converts and all
warrants that are assumed to be exercised in connection with the proposed
offering are included in the computation as common equivalent shares even when
the effect is anti-dilutive.
 
    UNAUDITED INTERIM FINANCIAL INFORMATION--The unaudited interim financial
information as of June 30, 1996 and for the six months ended June 30, 1995 and
1996 has been prepared on the same basis as the audited financial statements. In
the opinion of management, such unaudited information includes all adjustments
(consisting only of normal recurring accruals) necessary for a fair presentation
of this interim information. Operating results for the six months ended June 30,
1996 are not necessarily indicative of the results that may be expected for the
year ending December 31, 1996.
 
    UNAUDITED PRO FORMA INFORMATION--Unaudited pro forma information reflects
the conversion of each of the outstanding shares of Series CC redeemable
convertible preferred stock into two shares of common stock, the conversion of
each of the outstanding shares of Series AA, BB and DD convertible preferred
stock into two shares of common stock, the assumed exercise and conversion of
each of the outstanding warrants to purchase Series BB preferred stock into two
shares of common stock, and the assumed exercise of each of the outstanding
warrants issued in connection with the Company's Senior Discount Notes (see
Notes 5 and 7) for one share of common stock, upon the closing of the initial
public offering as contemplated by this Prospectus.
 
2. SHORT-TERM INVESTMENTS
 
    The fair value and the amortized cost of short-term investments at December
31, 1994 and 1995 and June 30, 1996 are presented as follows. Fair values are
based on quoted market prices obtained from the Company's broker. All of the
Company's short-term investments are classified as available-for-sale, since the
Company intends to sell them as needed for operations. The following tables
present the unrealized holding gains and losses related to each category of
investment security (in thousands):
 
<TABLE>
<CAPTION>
                                                                                 DECEMBER 31, 1994
                                                                       -------------------------------------
                                                                                     UNREALIZED
                                                                        AMORTIZED      LOSS ON      MARKET
                                                                          COST       INVESTMENT      VALUE
                                                                       -----------  -------------  ---------
<S>                                                                    <C>          <C>            <C>
Equity securities....................................................   $   6,001     $      (1)   $   6,000
Corporate debt securities............................................       3,509            (4)       3,505
Debt securities of states of the United States and political
  subdivisions of the states.........................................       2,500        --            2,500
                                                                       -----------        -----    ---------
Total................................................................   $  12,010     $      (5)   $  12,005
                                                                       -----------        -----    ---------
                                                                       -----------        -----    ---------
</TABLE>
 
                                      F-10
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
2. SHORT-TERM INVESTMENTS (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                           DECEMBER 31, 1995
                                                          ----------------------------------------------------
                                                                        UNREALIZED     UNREALIZED
                                                           AMORTIZED      LOSS ON        GAIN ON      MARKET
                                                             COST       INVESTMENT     INVESTMENT      VALUE
                                                          -----------  -------------  -------------  ---------
<S>                                                       <C>          <C>            <C>            <C>
Auction-rate preferred stock............................   $  19,803     $      (3)     $  --        $  19,800
Corporate debt securities...............................      64,664        --             --           64,664
Debt securities of states of the United States and
  political subdivisions of the states..................       3,000        --             --            3,000
Debt securities issued by United States government
  agencies..............................................       4,647        --                  2        4,649
Foreign debt securities.................................       3,668            (2)        --            3,666
                                                          -----------        -----          -----    ---------
Total...................................................   $  95,782     $      (5)     $       2    $  95,779
                                                          -----------        -----          -----    ---------
                                                          -----------        -----          -----    ---------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                             JUNE 30, 1996
                                                          ----------------------------------------------------
                                                                        UNREALIZED     UNREALIZED
                                                           AMORTIZED      LOSS ON        GAIN ON      MARKET
                                                             COST       INVESTMENT     INVESTMENT      VALUE
                                                          -----------  -------------  -------------  ---------
<S>                                                       <C>          <C>            <C>            <C>
Auction-rate preferred stock............................   $  22,800     $  --          $  --        $  22,800
Corporate debt securities...............................       9,453           (16)        --            9,437
                                                          -----------        -----          -----    ---------
Total...................................................   $  32,253     $     (16)     $  --        $  32,237
                                                          -----------        -----          -----    ---------
                                                          -----------        -----          -----    ---------
</TABLE>
 
    The final maturity periods of short-term investments at December 31, 1995
were as follows (in thousands):
 
<TABLE>
<CAPTION>
                                                                                 MARKET VALUE
                                                             -----------------------------------------------------
                                                                         ONE TO     GREATER
                                                              WITHIN      FIVE      THAN 10      NO
                                                             ONE YEAR     YEARS      YEARS    MATURITY     TOTAL
                                                             ---------  ---------  ---------  ---------  ---------
<S>                                                          <C>        <C>        <C>        <C>        <C>
Auction-rate preferred stock...............................  $  --      $  --      $  --      $  19,800  $  19,800
Corporate debt securities..................................     17,064     10,000     28,400      9,200     64,664
Debt securities of states of the United States and
  political subdivisions of the states.....................     --         --          3,000     --          3,000
Debt securities issued by United States government
  agencies.................................................      4,649     --         --         --          4,649
Foreign debt securities....................................      3,666     --         --         --          3,666
                                                             ---------  ---------  ---------  ---------  ---------
    Total..................................................  $  25,379  $  10,000  $  31,400  $  29,000  $  95,779
                                                             ---------  ---------  ---------  ---------  ---------
                                                             ---------  ---------  ---------  ---------  ---------
</TABLE>
 
                                      F-11
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
2. SHORT-TERM INVESTMENTS (CONTINUED)
    The final maturity periods of short-term investments at June 30, 1996 were
as follows (in thousands):
 
<TABLE>
<CAPTION>
                                                                     MARKET VALUE
                                               ---------------------------------------------------------
                                                             ONE TO      GREATER
                                               WITHIN ONE     FIVE       THAN 10       NO
                                                  YEAR        YEARS       YEARS     MATURITY     TOTAL
                                               -----------  ---------  -----------  ---------  ---------
Auction-rate preferred stock.................   $  --       $  --       $  22,800   $  --      $  22,800
<S>                                            <C>          <C>        <C>          <C>        <C>
Corporate debt securities....................       9,437      --          --          --          9,437
                                               -----------  ---------  -----------  ---------  ---------
                                                $   9,437   $  --       $  22,800   $  --      $  32,237
                                               -----------  ---------  -----------  ---------  ---------
                                               -----------  ---------  -----------  ---------  ---------
</TABLE>
 
    All short-term investments with a final maturity exceeding one year have
provisions requiring their repurchase at par at the option of the holder and for
adjustment to market rates of interest on at least an annual basis (auction-rate
preferred stock). The Company treats such investments as having a maturity of
one year or less for purposes of compliance with investment limitations provided
in the Senior Discount Note Indenture (see Note 5).
 
3. PROPERTY
 
    Property consists of (in thousands):
 
<TABLE>
<CAPTION>
                                                                     DECEMBER 31,
                                                                 --------------------   JUNE 30,
                                                                   1994       1995        1996
                                                                 ---------  ---------  -----------
Manufacturing equipment and tools..............................  $   1,363  $   4,870   $   6,403
<S>                                                              <C>        <C>        <C>
Office furniture and equipment.................................      3,639      4,111       5,712
Engineering equipment..........................................      1,639      2,119       2,604
                                                                 ---------  ---------  -----------
Total..........................................................      6,641     11,100      14,719
Accumulated depreciation and amortization......................     (3,770)    (3,561)     (5,590)
                                                                 ---------  ---------  -----------
Total..........................................................  $   2,871  $   7,539   $   9,129
                                                                 ---------  ---------  -----------
                                                                 ---------  ---------  -----------
</TABLE>
 
4. ACCRUED LIABILITIES
 
    Accrued liabilities consist of (in thousands):
 
<TABLE>
<CAPTION>
                                                                          DECEMBER 31,
                                                                      --------------------
                                                                        1994       1995     JUNE 30, 1996
                                                                      ---------  ---------  -------------
Accrued contractual obligations.....................................  $     325  $     273    $     315
<S>                                                                   <C>        <C>        <C>
Deferred revenue....................................................        210        190          192
Warranty reserve....................................................        130         15           14
Other...............................................................        224        503          469
                                                                      ---------  ---------        -----
Total...............................................................  $     889  $     981    $     990
                                                                      ---------  ---------        -----
                                                                      ---------  ---------        -----
</TABLE>
 
                                      F-12
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
5. SENIOR DISCOUNT NOTES
 
    In 1995, the Company received $175,837,000 in gross proceeds from the
issuance of $325,000,000 aggregate principal amount at maturity of its 13%
Senior Discount Notes due June 15, 2005 and related warrants to purchase
2,600,000 shares of common stock at $0.005 per share (the Notes and Common Stock
Warrants). Aggregate proceeds of $2,974,000 were attributed to the Common Stock
Warrants. Commencing December 15, 2000, interest will be payable on the Notes
semi-annually in arrears on each December 15 and June 15 at the rate of 13% per
annum.
 
    The Notes are redeemable at the option of the Company, in whole or in part,
at any time on and after June 15, 2000 at specified redemption prices for the
relevant year of redemption, plus accrued and unpaid interest to the date of
redemption. In addition, the Company may redeem in cash at its option at any
time prior to June 15, 1998 up to 25% of the aggregate principal amount of the
Notes at 113% of the accreted value thereof on the date of redemption plus
accrued and unpaid interest, if any, from the proceeds of a public equity
offering (as defined). There are no sinking fund requirements. In the event of a
change of control (as defined), each holder of the Notes has the option to
require the Company to repurchase such holder's Notes at 101% of the accreted
value thereof on the date of repurchase (if prior to June 15, 2000) or 101% of
the aggregate principal face amount thereof, plus accrued and unpaid interest,
if any, to the repurchase date (if on or after June 15, 2000). The Notes rank
senior in right of payment to all existing and future subordinated indebtedness
of the Company and pari passu with all existing and future senior indebtedness
of the Company. The Indenture pursuant to which the Senior Discount Notes were
issued contains certain covenants that, among other things, limit the ability of
the Company to make dividend payments, make investments, repurchase outstanding
shares of stock, prepay other debt obligations, incur additional indebtedness,
effect asset dispositions, engage in sale and leaseback transactions,
consolidate, merge or sell all or substantially all of the Company's assets,
engage in transactions with affiliates, or effect certain transactions by its
restricted subsidiaries (as defined). At December 31, 1995, a portion of the
Company's short-term investments had been made in corporate debt securities and
auction-rate preferred stock in amounts which exceeded the investment
limitations under the Indenture. The Company was otherwise in compliance with
the financial covenants of the Indenture at December 31, 1995. The Company
subsequently adjusted its investment portfolio to bring it into compliance with
such limitations within the period provided by the Indenture, and at June 30,
1996 the Company was in compliance with all covenants of the Indenture.
 
6. SERIES CC REDEEMABLE CONVERTIBLE PREFERRED STOCK
 
    In conjunction with the proposed initial public offering of the Company's
common stock, all outstanding shares of Series CC redeemable convertible
preferred stock will automatically convert into common stock upon the closing of
the offering (see Note 1).
 
    At December 31, 1995 and June 30, 1996, 3,215,768 shares of Series CC
redeemable convertible preferred stock were designated and outstanding. Each
share is convertible into two shares of common stock, subject to adjustments for
events of dilution. In addition to converting upon an initial public offering,
the Series CC redeemable convertible preferred stock is also automatically
convertible into common stock upon the election of the holders of more than 60%
of the outstanding shares of such series, or at such time as fewer than 500,000
shares remain outstanding. Each share has the same voting rights as the number
of shares of common stock into which it is convertible.
 
                                      F-13
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
6. SERIES CC REDEEMABLE CONVERTIBLE PREFERRED STOCK (CONTINUED)
    Holders are entitled to noncumulative dividends of $0.964 per share or, in
the event of liquidation or merger, liquidation distributions of $9.64 per share
in preference to all convertible preferred stock. The holders of Series CC
preferred stock have the right of first refusal to purchase a pro rata portion
of preferred or common stock the Company proposes to issue to any public or
private utility. Further, the holders of Series CC preferred stock have the
right of first refusal to purchase a pro rata portion of any preferred or common
stock that any subsidiary of the Company proposes to issue to any public or
private utility if the subsidiary's business is unrelated to the market area of
such utility or if such securities are convertible into common or preferred
stock of the Company. The right of first refusal terminates three years after an
initial public offering.
 
    Under a Put Agreement dated August 15, 1994 (the Put Agreement), the holders
of Series CC preferred stock, acting as a group representing not less than 25%
of the outstanding Series CC preferred stock, have the right to "put" those
shares to the Company after May 12, 2001 (Investor Put) at the higher of $9.64
per share or the fair market value at the time of exercise of the Investor Put
(the Redemption Price). The Investor Put will be extinguished in the event of an
initial pubic offering by the Company of its common stock in which the net
proceeds to the Company are at least $20 million, in the event of the sale of
the Company or if not exercised by November 13, 2002. In the event the Investor
Put is not completed by the Company for any reason within six months after the
right is exercised then (a) the Redemption Price shall increase annually from
the date the Investor Put was exercised at a rate of 15% for the first year, and
five additional percentage points for each year thereafter (pro rated for any
partial year), and (b) the holders of Series CC preferred stock shall have the
right to initiate a separate demand registration at the Company's expense only
for the holders of shares with rights under the Investor Put. In the event the
fair market value of the Series CC preferred stock exceeds $96.40 (as adjusted
for any stock split, stock dividend, or other combinations or reclassifications)
per share at the time the Investor Put is exercised, the amount payable to the
holders of the Series CC preferred stock who participate in the Investor Put may
be paid 50% at closing and the balance, plus interest at the prime rate, on the
first anniversary of the closing. The Company's obligations under the Put
Agreement will be suspended for such time that performance of such obligations
would result in a breach of, a default, or an event of default under the
Indenture governing the Company's Senior Discount Notes or would otherwise
result in a violation of law.
 
7. STOCKHOLDERS' EQUITY (DEFICIT)
 
    CONVERTIBLE PREFERRED STOCK--In conjunction with the proposed initial public
offering of the Company's common stock, all outstanding shares of convertible
preferred stock will automatically convert into common stock upon the closing of
the offering (See Note 1). At December 31, 1995, convertible preferred stock
consists of:
 
<TABLE>
<CAPTION>
                                                                                     AMOUNT (NET OF
                                                                            ISSUE       ISSUANCE      LIQUIDATION
                                                 DESIGNATED  OUTSTANDING    PRICE        COSTS)       PREFERENCE
                                                 ----------  -----------  ---------  --------------  -------------
<S>                                              <C>         <C>          <C>        <C>             <C>
Series AA......................................   5,000,000   5,000,000   $    1.00   $  4,928,000   $   5,000,000
Series BB......................................   4,256,733   3,489,845        4.75     16,073,000      16,577,000
Series DD......................................     647,923     646,830        9.64      6,194,000       6,235,000
                                                 ----------  -----------             --------------  -------------
                                                  9,904,656   9,136,675               $ 27,195,000   $  27,812,000
                                                 ----------  -----------             --------------  -------------
                                                 ----------  -----------             --------------  -------------
</TABLE>
 
                                      F-14
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
7. STOCKHOLDERS' EQUITY (DEFICIT) (CONTINUED)
Significant terms of the convertible preferred stock are as follows:
 
    - Each share is convertible into two shares of common stock, subject to
      adjustments for events of dilution. Shares of Series AA, BB and DD
      preferred stock will automatically be converted into common stock upon
      completion of a public offering with net proceeds in excess of $20 million
      and at a price equal to or greater than $2.00, $6.00 ($12.05 after January
      1, 1997) and $9.64 ($12.05 after January 1, 1997) per common share,
      respectively (see Note 1). Each series of preferred stock is also
      automatically convertible into common stock upon the election of the
      holders of more than 50% of the outstanding shares of such series, or at
      such time as fewer than 500,000 shares (1,000,000 shares in the case of
      Series AA preferred stock) of such series (as adjusted for stock splits,
      stock dividends and combinations) remain outstanding.
 
    - Each share has the same voting rights as the number of shares of common
      stock into which it is convertible.
 
    - Holders of preferred stock are entitled to noncumulative dividends or, in
      the event of liquidation or merger, distributions in the order of
      preference shown as follows:
 
<TABLE>
<CAPTION>
                                                                  NON-CUMULATIVE    LIQUIDATION
                                                                   DIVIDENDS PER   DISTRIBUTION
                                                                       SHARE         PER SHARE
                                                                  ---------------  -------------
<S>                                                               <C>              <C>
Series BB.......................................................     $   0.475       $    4.75
Series AA.......................................................     $   0.100       $    1.00
Series DD.......................................................     $   0.964       $    9.64
</TABLE>
 
    - Each series of preferred stock must receive their full dividend before the
      next series receives any dividends. Additionally, any dividends exceeding
      these minimum amounts are shared between the common and preferred shares
      on a pro-rata basis.
 
    - Each series of preferred stock must receive their full preferential
      amounts before the next series receives any liquidation distributions.
      Additionally, any funds available for distribution in excess of these
      minimum amounts, plus $0.25 per share for common stock, is to be
      distributed ratably among the holders of the common, redeemable
      convertible preferred and convertible preferred stock.
 
    - The holders of at least 5,000 shares of Series AA or BB preferred stock
      have the right of first refusal to purchase their pro rata portion of
      certain issues of preferred or common stock of the Company on the same
      terms and conditions as the Company offers such securities to other
      investors, subject to certain conditions and limitations. The right of
      first refusal of all holders terminates upon the registered public
      offering of the Company's common stock with net proceeds of at least $20
      million.
 
                                      F-15
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
7. STOCKHOLDERS' EQUITY (DEFICIT) (CONTINUED)
    COMMON STOCK--At December 31, 1995 and June 30, 1996, the Company had
reserved shares of common stock for issuance as follows:
 
<TABLE>
<CAPTION>
                                                          DECEMBER    JUNE 30,
                                                          31, 1995      1996
                                                         ----------  -----------
<S>                                                      <C>         <C>
Conversion of preferred stock..........................  24,704,886   24,705,692
Issuance under stock option plans......................  5,261,630     5,086,420
Issuance upon exercise of common stock warrants........  2,653,832     2,653,832
Issuance upon exercise and conversion of Series BB
  preferred stock warrants.............................  1,533,776     1,532,970
                                                         ----------  -----------
Total..................................................  34,154,124   33,978,914
                                                         ----------  -----------
                                                         ----------  -----------
</TABLE>
 
    WARRANTS--At December 31, 1995, the following warrants to purchase stock
were outstanding:
 
    Warrants to purchase 2,310 shares of common stock at $126.92 per share are
exercisable and expire at various dates through December 9, 1996, or, with
notice from the Company immediately prior to (a) the closing of a firm
committment underwritten initial public offering of the Company's securities,
(b) the merger of the Company into or with another corporation in which the
Company is not the survivor and the stockholders of the Company own less than
50% of the voting securities of the surviving corporation, or (c) the sale,
transfer or lease of all or substantially all of the assets of the Company.
 
    Warrants to purchase 750 shares (300 shares at June 30, 1996) of common
stock at $20.00 per share, are exercisable and expire at various dates through
February 6, 1997, or, with notice from the Company immediately prior to (a) the
merger of the Company into or with another corporation in which the stockholders
of the Company hold less than 50% of the voting securities of the surviving
corporation or its parent; (b) the sale, conveyance or disposition of all or
substantially all of the assets of the Company, or (c) the liquidation,
dissolution or winding up of the Company.
 
    Warrants to purchase 50,000 shares of common stock at $2.00 per share become
exercisable over a five-year period at the rate of 20% per year commencing
August 21, 1992, subject to certain conditions. The purchase right may not be
exercised prior to either (a) February 24, 1998, (b) the effective date of a
registration statement filed by the Company for an initial public offering of
its common stock, (c) five days prior to the merger of the Company with or into
another corporation as a result of which the stockholders of the Company hold
less than 50% of the equity securities of the surviving corporation or its
parent, or (d) five days prior to a sale, conveyance or disposition of all or
substantially all of the assets of the Company. The warrants expire on February
24, 1999, or, with written notice from the Company, two days prior to (a) the
merger of the Company with or into a corporation as a result of which the
stockholders of the Company hold less than 50% of the equity securities of the
surviving corporation or its parent (unless the securities received are freely
tradable and listed on a national securities exchange or on the Nasdaq National
Market), (b) the sale, conveyance or disposition of all or substantially all of
the assets of the Company, or (c) the liquidation, dissolution or winding up of
the Company.
 
    In connection with the sale of Series BB preferred stock in 1993 certain
purchasers were granted warrants to purchase an additional 766,888 shares
(766,485 shares at June 30, 1996) of Series BB preferred stock at $4.75 per
share. The warrants are exercisable from the date of grant through the earlier
of
 
                                      F-16
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
7. STOCKHOLDERS' EQUITY (DEFICIT) (CONTINUED)
(a) September 30, 1998 or (b) with written notice from the Company, immediately
prior to (i) the closing of a firm committment underwritten initial public
offering of the Company's securities (see Note 1), (ii) the merger of the
Company into or with another corporation in which the Company is not the
survivor and the stockholders of the Company hold less than 50% of the voting
securities of the surviving corporation, or (iii) the sale, transfer or lease of
all or substantially all of the assets of the Company.
 
    Warrants to purchase 2,600,000 shares of common stock at $0.005 per share
were granted in connection with the issuance and sale in 1995 of the Company's
Senior Discount Notes (see Note 5). The warrants expire on the earliest to occur
of (a) June 15, 2005, (b) 90 days after a change of control of the Company (as
defined) (see Note 1), and (c) 90 days after the consummation of a public equity
offering of the Company (as defined). The warrants may be exercised on the
earliest to occur of (a) the seventh day prior to a change of control of the
Company (as defined), (b) the consummation of a public equity offering (as
defined), or (c) 90 days prior to expiration.
 
    STOCK OPTION PLANS--The Company has stock option plans (the Plans) under
which shares are reserved for issuance to officers, directors, employees and
consultants. Under the Plans, both incentive and nonstatutory stock options to
purchase common stock may be granted or restricted common stock may be sold at
prices not less than the fair market value of the common stock at the date of
grant. The fair market value and terms of exercise are determined by the Board
of Directors. Options outstanding at December 31, 1995 generally become
exercisable ratably over five years, commencing six months from the date of the
individual's employment or the date of grant and expire ten years from the date
of grant. At December 31, 1995, there were 1,827,000 shares available for future
grants under the Plans.
 
    A summary of stock option activity under the Plans on a combined basis is as
follows:
 
<TABLE>
<CAPTION>
                                                                                         OUTSTANDING OPTIONS
                                                                                    -----------------------------
                                                                                     NUMBER OF
                                                                                      SHARES     PRICE PER SHARE
                                                                                    -----------  ----------------
<S>                                                                                 <C>          <C>
Balances, January 1, 1994.........................................................    1,618,434  $  0.05 to $0.25
Granted...........................................................................    4,447,850     0.25 to  0.50
Exercised.........................................................................     (533,656)    0.25 to  0.50
Cancelled.........................................................................     (292,000)    0.25 to  0.50
                                                                                    -----------
Balances, December 31, 1994                                                           5,240,628     0.05 to  0.50
Granted...........................................................................      514,600     0.50 to  1.50
Exercised.........................................................................   (2,318,096)    0.05 to  0.50
Cancelled.........................................................................     (163,498)    0.05 to  1.50
                                                                                    -----------
Balances, December 31, 1995                                                           3,273,634     0.05 to  1.50
Granted...........................................................................      743,310     1.75 to  3.00
Exercised.........................................................................     (175,210)    0.05 to  1.50
Cancelled.........................................................................      (62,598)    0.50 to  2.00
                                                                                    -----------
Balances, June 30, 1996...........................................................    3,779,136  $  0.05 to  3.00
                                                                                    -----------
                                                                                    -----------
</TABLE>
 
                                      F-17
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
7. STOCKHOLDERS' EQUITY (DEFICIT) (CONTINUED)
    RESTRICTED STOCK--Certain officers, employees and consultants exercised
unvested stock options with cash or full recourse notes. The related shares of
common stock are subject to repurchase by the Company at the orginal purchase
price per share upon the purchaser's cessation of service prior to the vesting
of such shares. The restricted stock continues to vest in accordance with the
terms of the original stock option. The related notes bear interest at rates
ranging from 6.04% to 7.92% and are due in 1999 through 2000. At December 31,
1995, 1,847,156 outstanding shares of such stock were subject to repurchase at
the original exercise price (1,688,908 shares at June 30, 1996).
 
8. INCOME TAXES
 
    No federal income taxes were provided in 1993, 1994, 1995 or for the six
months ended June 30, 1996 due to the Company's net losses. The provisions for
income taxes for these periods represent various state minimum income and
franchise taxes. The provision for income taxes differs from the amount computed
by applying the federal statutory income tax rate to the loss before income
taxes as follows:
 
<TABLE>
<CAPTION>
                                                              YEARS ENDED DECEMBER 31,        SIX MONTHS
                                                         ----------------------------------   ENDED JUNE
                                                            1993        1994        1995       30, 1996
                                                         ----------  ----------  ----------  -------------
<S>                                                      <C>         <C>         <C>         <C>
Taxes computed at federal statutory rate...............       35.0%       35.0%       35.0%        35.0%
State income taxes, net of federal effect..............        4.5         4.5         4.5          4.5
Research tax credits...................................        2.8         3.1         1.0          0.6
Change in valuation allowance..........................      (42.2)      (42.5)      (40.4)       (40.0)
                                                             -----       -----       -----        -----
Total provision........................................        0.1%        0.1%        0.1%         0.1%
                                                             -----       -----       -----        -----
                                                             -----       -----       -----        -----
</TABLE>
 
    The tax effects of temporary differences that give rise to deferred taxes
were as follows (in thousands):
 
<TABLE>
<CAPTION>
                                                                   DECEMBER 31,
                                                               --------------------   JUNE 30,
                                                                 1994       1995        1996
                                                               ---------  ---------  -----------
Deferred tax assets:
<S>                                                            <C>        <C>        <C>
  Expenses not currently deductible for tax purposes.........  $   1,504  $   2,182   $   1,995
  Senior discount note interest..............................     --          3,817       8,274
  Tax net operating loss and credit carryforwards............     18,939     30,910      40,723
  Research and development expenses capitalized for tax
    purposes.................................................      1,991      3,645       2,044
                                                               ---------  ---------  -----------
Total deferred tax assets....................................     22,434     40,554      53,036
Valuation allowance on deferred tax assets...................    (22,434)   (40,554)    (53,036)
                                                               ---------  ---------  -----------
Net deferred income taxes....................................  $  --      $  --       $  --
                                                               ---------  ---------  -----------
                                                               ---------  ---------  -----------
</TABLE>
 
    At December 31, 1995, the Company had net operating loss carryforwards of
approximately $82,500,000 and $7,300,000 available to offset future federal and
California taxable income, respectively. The extent to which the loss
carryforwards can be used to offset future taxable income may be limited,
depending on the extent of ownership changes within any three-year period as
provided in the Tax Reform
 
                                      F-18
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
8. INCOME TAXES (CONTINUED)
Act of 1986 and the California Conformity Act of 1987. Such federal
carryforwards expire in 2001 through 2010. Such state carryforwards expire in
1996 through 2000.
 
    Equity issuances in April 1991 triggered such a limitation on loss
carryforwards. At that time, the Company had federal net operating loss
carryforwards of approximately $10,500,000. As of December 31, 1995,
approximately $4,000,000 of this net operating loss remains limited to an annual
usage of approximately $1,400,000 for federal income tax purposes. Any
significant stock issuances after December 31, 1995 will likely result in
another such ownership change. The annual limitation for utilization of the net
operating losses and tax credit carryforwards incurred up to the point of change
will be equal to the fair market value of the Company immediately before such
change multiplied by the then current long-term tax exempt interest rate.
 
    The Company has capitalized approximately $59,400,000 of research and
development expenditures for California purposes which are available for
amortization in future years. Realization of the deferred tax assets associated
with these expenditures is contingent upon the amount of income or loss
apportioned to California during the subject amortization periods. Research and
development tax credit carryforwards of approximately $1,800,000 and $900,000
are also available to offset future federal and California income taxes payable,
respectively.
 
    A valuation allowance has been recorded against tax assets for which
realization is uncertain. Based upon the Company's history of operating losses
and the expiration dates of the loss carryforwards, the Company has recorded a
valuation allowance to the full extent of its net deferred tax assets.
 
9. CONTINGENCIES AND COMMITMENTS
 
    The industry in which the Company operates is characterized by frequent
litigation regarding patent and other intellectual property rights. The Company
is party to a trademark claim. Although the ultimate outcome of this matter is
not presently determinable, management believes that its resolution will not
have a material effect on the Company's financial position or results of
operations.
 
    At December 31, 1994 and 1995 and June 30, 1996, equipment with a net book
value of $456,000, $854,000 and $822,000 (net of accumulated amortization of
$1,495,000, $372,000 and $536,000, respectively), has been leased under capital
leases.
 
    The Company leases its manufacturing and office facilities under a
noncancelable operating lease which expires in December 2000. Deferred rent
results from the difference between facilities rent expense recognized on the
straight-line basis over the term of the lease as compared to the contractual
payments made.
 
                                      F-19
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
                  YEARS ENDED DECEMBER 31, 1993, 1994 AND 1995
 
   (INFORMATION AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1995 AND 1996 IS
                                   UNAUDITED)
 
9. CONTINGENCIES AND COMMITMENTS (CONTINUED)
    Future minimum annual rental payments under capital and operating leases are
as follows (in thousands):
 
<TABLE>
<CAPTION>
                                                                                             CAPITAL     OPERATING
YEARS ENDING DECEMBER 31,                                                                    LEASES       LEASES
- -----------------------------------------------------------------------------------------  -----------  -----------
<S>                                                                                        <C>          <C>
1996.....................................................................................  $       360   $   1,087
1997.....................................................................................          315       1,059
1998.....................................................................................          158       1,040
1999.....................................................................................           91       1,046
2000.....................................................................................           54       1,081
Thereafter...............................................................................      --              749
                                                                                           -----------  -----------
Total minimum lease payments.............................................................          978   $   6,062
                                                                                                        -----------
                                                                                                        -----------
Amount representing interest.............................................................         (158)
                                                                                           -----------
Present value of minimum lease payments..................................................  $       820
                                                                                           -----------
                                                                                           -----------
</TABLE>
 
    Facilities rent expense was $245,000, $421,000, $901,000, and $599,000 for
1993, 1994, 1995 and for the six months ended June 30, 1996, respectively. Rent
expense is net of sublease income of $296,000 and $175,000 in 1993 and 1994,
respectively.
 
10. SUBSEQUENT EVENTS
 
    On August 30, 1996 the Company reincorporated in Delaware. The Board of
Directors of the Company approved a two-for-one split of all outstanding shares
of common stock effective as of September 5, 1996. All shares and per-share
amounts have been adjusted to reflect this split. On October 2, 1996, the
Company went effective as a public company.
 
    Also in October 1996 the Company became a party to a patent infringement
suit and a class action lawsuit. Although the ultimate outcome of these matters
is not presently determinable, management believes that the resolution of these
suits will not have a material effect on the Company's financial position or
results of operations.
 
                              *    *    *    *    *
 
                                      F-20
<PAGE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
    NO DEALER, SALESPERSON OR OTHER INDIVIDUAL HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS
PROSPECTUS IN CONNECTION WITH THE OFFERING COVERED BY THIS PROSPECTUS. IF GIVEN
OR MADE, SUCH INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS HAVING
BEEN AUTHORIZED BY THE COMPANY. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO
SELL, OR A SOLICITATION OF AN OFFER TO BUY, IN ANY JURISDICTION WHERE, OR TO ANY
PERSON TO WHOM, IT IS UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION. NEITHER THE
DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY
CIRCUMSTANCES, CREATE AN IMPLICATION THAT THERE HAS NOT BEEN A CHANGE IN THE
FACTS SET FORTH IN THIS PROSPECTUS OR IN THE AFFAIRS OF THE COMPANY SINCE THE
DATE HEREOF.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                   PAGE
                                                 ---------
<S>                                              <C>
Available Information..........................          5
Additional Information.........................          5
Prospectus Summary.............................          6
Consolidated Financial and Other Data..........         13
Risk Factors...................................         15
Use of Proceeds................................         27
Dividend Policy................................         27
Capitalization.................................         28
Selected Consolidated Financial Data...........         29
Management's Discussion and Analysis of
  Financial Condition and Results of
  Operations...................................         31
Business.......................................         38
Management.....................................         57
Certain Transactions...........................         65
Principal Stockholders.........................         68
The Exchange Offer.............................         71
Description of Old Notes.......................         78
Description of New Notes.......................        112
Certain U.S. Federal Income Tax
  Considerations...............................        112
Plan of Distribution...........................        113
Legal Matters..................................        114
Experts........................................        114
Glossary.......................................        A-1
Index to Consolidated Financial Statements.....        F-1
</TABLE>
 
                                  $325,000,000
 
                          PRINCIPAL AMOUNT AT MATURITY
 
                                  CELLNET DATA
                                 SYSTEMS, INC.
 
                           13% SENIOR DISCOUNT NOTES
                                    DUE 2005
 
                             ---------------------
 
                                   PROSPECTUS
 
                             ---------------------
 
                                          , 1996
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
    Article 7 of the Registrant's Restated Certificate of Incorporation provides
for the indemnification of directors to the fullest extent permissible under
Delaware law.
 
    Article 6 of the Registrant's Bylaws provides for the indemnification of
officers, directors, employees and agents of the corporation if such person
acted in good faith and in a manner reasonably believed to be in and not opposed
to the best interest of the corporation, and, with respect to any criminal
action or proceeding the indemnified party had no reason to believe his conduct
was unlawful.
 
    Section 145 of the Delaware General Corporation Law permits a corporation to
include in its charter documents, and in agreements between the corporation and
its directors and officers, provisions expanding the scope of indemnification
beyond that specifically provided by the current law.
 
    The Registrant has entered into indemnification agreements with its
directors and executive officers, and intends to enter into indemnification
agreements with any new directors and executive officers in the future.
 
ITEM 21. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
    (a) Exhibits.
 
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER                                                 DESCRIPTION
- ----------  ------------------------------------------------------------------------------------------------------
<C>         <S>
    3.1*    Amended and Restated Certificate of Incorporation filed on September 26, 1996.
 
    3.2*    Bylaws.
 
    4.1*    Specimen Common Stock Certificate.
 
    4.2*    Indenture between the Registrant and The Bank of New York dated June 15, 1995, including form of
              Senior Discount Note.
 
    4.3*    Warrant Agreement between the Registrant and The Bank of New York dated June 15, 1995, including form
              of Warrant.
 
    4.4*    Notes Registration Rights Agreement dated June 15, 1995 by and between the Registrant and Smith Barney
              Inc.
 
    4.5*    Warrants Registration Rights Agreement dated June 15, 1995 by and between the Registrant and Smith
              Barney Inc.
 
    4.6*    First Supplemental Indenture between the Registrant and The Bank of New York dated November 21, 1995.
 
    4.7*    First Supplemental Warrant Agreement between the Registrant and The Bank of New York dated November
              21, 1995.
 
    4.8*    First Supplemental Notes Registration Rights Agreement dated November 21, 1995 by and between the
              Registrant and Smith Barney Inc.
 
    4.9*    First Supplemental Warrants Registration Rights Agreement dated November 21, 1995 by and between the
              Registrant and Smith Barney Inc.
 
    4.10*   Warrant Agreement between the Registrant and Axonn Corporation dated August 12, 1992.
 
    4.11*   Form of Warrant Agreement between the Registrant and Diablo Research Corporation.
 
    4.12*   Stock Purchase Agreement dated September 6, 1996 between the Registrant and Northern States Power
              Registrant.
</TABLE>
 
                                      II-1
<PAGE>
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER                                                 DESCRIPTION
- ----------  ------------------------------------------------------------------------------------------------------
<C>         <S>
    4.13*   Stock Purchase Agreement dated September 4, 1996 between the Registrant and Union Electric Development
              Corporation.
 
    4.14*   Stock Purchase Agreement dated September 16, 1996 between the Registrant and Bechtel Enterprises, Inc.
 
    4.15    Second Supplemental Indenture by and between the Registrant and The Bank of New York dated as of
              August 30, 1996.
 
    4.16    Specimen 13% Senior Discount Note Due 2005, Series B.
 
    5.1*    Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation.
 
   10.1*    Form of current Indemnification Agreement for directors and officers.
 
   10.2A*   1992 Stock Option Plan and forms of agreements thereunder.
 
   10.2B*   1994 Stock Plan and forms of agreements thereunder.
 
   10.3*    1996 Employee Stock Purchase Plan.
 
   10.4*    Shareholders's Agreement between the Registrant and certain shareholders dated August 15, 1994, as
              amended by Amendment No. 1 on December 22, 1994, Amendment No. 2 on June 15, 1995 and Amendment No.
              3 on November 21, 1995.
 
   10.5*    Lease between the Registrant and WDT Shoreway dated April 6, 1989 for the Registrant's San Carlos
              headquarters.
 
   10.6*    Restricted Stock Purchase Agreement between the Registrant and John Seidl dated December 27, 1994.
 
   10.7*    Restricted Stock Purchase Agreement between the Registrant and James Jennings dated August 1, 1995.
 
   10.8*    Restricted Stock Purchase Agreement between the Registrant and Philip Mallory dated July 21, 1995.
 
   10.9*    Restricted Stock Purchase Agreement between the Registrant and Larsh Johnson dated August 1, 1995.
 
   10.10+*  License Agreement between the Registrant and Axonn Corporation dated August 21, 1992, as amended by an
              Addendum and a Second Addendum, each dated November 8, 1993.
 
   10.11+*  License Agreement between the Registrant and Axonn Corporation dated March 25, 1996.
 
   10.12+*  License Agreement between the Registrant and Life Point Systems Limited Partnership dated August 12,
              1994.
 
   10.13*   Agreement between the Registrant and James Jennings dated July 11, 1994.
 
   10.14*   Form of Employee Severance Agreement.
 
   10.15*   Form of Promissory Note between the Registrant and certain officers of the Registrant in connection
              with the purchase of restricted stock.
 
   11.1*    Statement regarding computation of per share earnings.
 
   21.1*    Subsidiaries of the Registrant.
 
   23.1*    Independent Auditors' Consent and Report on Schedule.
 
   23.3*    Consent of Counsel (included in Exhibit 5.1).
 
   24.1*    Power of Attorney (included on Page II-4).
 
   25.1     Statement of Eligibility of Trustee.
</TABLE>
 
                                      II-2
<PAGE>
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER                                                 DESCRIPTION
- ----------  ------------------------------------------------------------------------------------------------------
<C>         <S>
   27.1*    Financial Data Schedule.
 
   99.1     Form of Letter of Transmittal with respect to Exchange Offer.
 
   99.2     Form of Notice of Guaranteed Delivery.
 
   99.3     Form of Exchange Agreement.
</TABLE>
 
- ------------------------
 
*   Previously filed
 
+   Confidential Treatment granted
 
    (b)  Financial Statement Schedules
 
    Schedules not listed above have been omitted because the information to be
set forth therein is not applicable or is shown in the financial statements or
notes thereto.
 
    The following financial statement schedule is filed as part of this
Registration Statement.
 
    Schedule II--Valuation and Qualifying Accounts and Reserves
 
ITEM 22. UNDERTAKING
 
    1.  The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Securities and Exchange Act of 1934, as amended (the "Exchange Act") (and, where
applicable, each filing of an employee benefit plan's annual report pursuant to
Section 15(d) of the Exchange Act) that is incorporated by reference in the
Registration Statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.
 
    2.  Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Commission such indemnification is
against public policy as expressed in the Securities Act and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or
paid by a director, officer or controlling person of the Registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.
 
    3.  The undersigned Registrant hereby undertakes to respond to requests for
information that is incorporated by reference into the prospectus pursuant to
Items 4, 10(b), 11 or 13 of this Form, within one business day of receipt of
such request, and to send the incorporated documents by first class mail or
other equally prompt means. This includes information contained in documents
filed subsequent to the effective date of the Registration Statement through the
date of responding to the request.
 
    4.  The undersigned Registrant hereby undertakes to supply by means of a
post-effective amendment all information concerning a transaction, and the
company being acquired involved therein, that was not the subject of and
included in this Registration Statement when it became effective.
 
                                      II-3
<PAGE>
                                   SIGNATURES
 
    Pursuant to the requirements of the Securities Act, the Registrant has duly
caused this Amendment to the Registration Statement to be signed on its behalf
by the undersigned, thereunto duly authorized, in the City of San Carlos, State
of California on the 27th day of December, 1996.
 
                                CELLNET DATA SYSTEMS, INC.
 
                                By:              /s/ PAUL G. MANCA
                                     -----------------------------------------
                                                   Paul G. Manca,
                                     VICE PRESIDENT AND CHIEF FINANCIAL OFFICER
 
    Pursuant to the requirements of the Securities Act of 1933, as amended, this
Amendment to the Registration Statement has been signed by the following persons
in the capacities and on the dates indicated:
 
<TABLE>
<CAPTION>
          SIGNATURE                       TITLE                    DATE
- ------------------------------  --------------------------  -------------------
<C>                             <S>                         <C>
                                President, Chief Executive
      /s/ JOHN M. SEIDL*          Officer and Director
- ------------------------------    (Principal Executive       December 27, 1996
       (John M. Seidl)            Officer)
 
                                Vice President and Chief
      /s/ PAUL G. MANCA           Financial Officer
- ------------------------------    (Principal Financial and   December 27, 1996
       (Paul G. Manca)            Accounting Officer)
 
      /s/ PAUL M. COOK*
- ------------------------------  Chairman of the Board,       December 27, 1996
        (Paul M. Cook)            Director
 
     /s/ NEAL M. DOUGLAS*
- ------------------------------  Director                     December 27, 1996
      (Neal M. Douglas)
 
   /s/ WILLIAM C. EDWARDS*
- ------------------------------  Director                     December 27, 1996
     (William C. Edwards)
 
      /s/ WILLIAM HART*
- ------------------------------  Director                     December 27, 1996
        (William Hart)
 
       /s/ BRIAN KWAIT*
- ------------------------------  Director                     December 27, 1996
        (Brian Kwait)
</TABLE>
 
                                      II-4
<PAGE>
<TABLE>
<CAPTION>
          SIGNATURE                       TITLE                    DATE
- ------------------------------  --------------------------  -------------------
<C>                             <S>                         <C>
     /s/ NANCY E. PFUND*
- ------------------------------  Director                     December 27, 1996
       (Nancy E. Pfund)
 
      /s/ PAUL J. SALEM*
- ------------------------------  Director                     December 27, 1996
       (Paul J. Salem)
 
    /s/ HENRY B. SARGENT*
- ------------------------------  Director                     December 27, 1996
      (Henry B. Sargent)
 
    *By /s/ PAUL G. MANCA
- ------------------------------
       (Paul G. Manca)
      (ATTORNEY-IN-FACT)
</TABLE>
 
                                      II-5
<PAGE>
                           CELLNET DATA SYSTEMS, INC.
                       REGISTRATION STATEMENT ON FORM S-4
                               INDEX TO EXHIBITS
 
<TABLE>
<CAPTION>
 EXHIBIT
 NUMBER                                                  DESCRIPTION
- ---------  --------------------------------------------------------------------------------------------------------
<C>        <S>
 
   3.1*    Amended and Restated Certificate of Incorporation filed on September 26, 1996.
 
   3.2*    Bylaws.
 
   4.1*    Specimen Common Stock Certificate.
 
   4.2*    Indenture between the Registrant and The Bank of New York dated June 15, 1995, including form of Senior
             Discount Note.
 
   4.3*    Warrant Agreement between the Registrant and The Bank of New York dated June 15, 1995, including form of
             Warrant.
 
   4.4*    Notes Registration Rights Agreement dated June 15, 1995 by and between the Registrant and Smith Barney
             Inc.
 
   4.5*    Warrants Registration Rights Agreement dated June 15, 1995 by and between the Registrant and Smith
             Barney Inc.
 
   4.6*    First Supplemental Indenture between the Registrant and The Bank of New York dated November 21, 1995.
 
   4.7*    First Supplemental Warrant Agreement between the Registrant and The Bank of New York dated November 21,
             1995.
 
   4.8*    First Supplemental Notes Registration Rights Agreement dated November 21, 1995 by and between the
             Registrant and Smith Barney Inc.
 
   4.9*    First Supplemental Warrants Registration Rights Agreement dated November 21, 1995 by and between the
             Registrant and Smith Barney Inc.
 
   4.10*   Warrant Agreement between the Registrant and Axonn Corporation dated August 12, 1992.
 
   4.11*   Form of Warrant Agreement between the Registrant and Diablo Research Corporation.
 
   4.12*   Stock Purchase Agreement dated September 6, 1996 between the Registrant and Northern States Power
             Company.
 
   4.13*   Stock Purchase Agreement dated September 4, 1996 between the Registrant and Union Electric Development
             Corporation.
 
   4.14*   Stock Purchase Agreement dated September 16, 1996 between the Registrant and Bechtel Enterprises, Inc.
 
   4.15    Second Supplemental Indenture by and between the Registrant and The Bank of New York dated as of August
             30, 1996.
 
   4.16    Specimen 13% Senior Discount Note Due 2005, Series B.
 
   5.1*    Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation.
 
  10.1*    Form of current Indemnification Agreement for directors and officers.
 
  10.2A*   1992 Stock Option Plan and forms of agreements thereunder.
 
  10.2B*   1994 Stock Plan and forms of agreements thereunder.
 
  10.3*    1996 Employee Stock Purchase Plan.
 
  10.4*    Shareholders's Agreement between the Registrant and certain shareholders dated August 15, 1994, as
             amended by Amendment No. 1 on December 22, 1994, Amendment No. 2 on June 15, 1995 and Amendment No. 3
             on November 21, 1995.
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
 EXHIBIT
 NUMBER                                                  DESCRIPTION
- ---------  --------------------------------------------------------------------------------------------------------
<C>        <S>
  10.5*    Lease between the Registrant and WDT Shoreway dated April 6, 1989 for the Registrant's San Carlos
             headquarters.
 
  10.6*    Restricted Stock Purchase Agreement between the Registrant and John Seidl dated December 27, 1994.
 
  10.7*    Restricted Stock Purchase Agreement between the Registrant and James Jennings dated August 1, 1995.
 
  10.8*    Restricted Stock Purchase Agreement between the Registrant and Philip Mallory dated July 21, 1995.
 
  10.9*    Restricted Stock Purchase Agreement between the Registrant and Larsh Johnson dated August 1, 1995.
 
  10.10+*  License Agreement between the Registrant and Axonn Corporation dated August 21, 1992, as amended by an
             Addendum and a Second Addendum, each dated November 8, 1993.
 
  10.11+*  License Agreement between the Registrant and Axonn Corporation dated March 25, 1996.
 
  10.12+*  License Agreement between the Registrant and Life Point Systems Limited Partnership dated August 12,
             1994.
 
  10.13*   Agreement between the Registrant and James Jennings dated July 11, 1994.
 
  10.14*   Form of Employee Severance Agreement.
 
  10.15*   Form of Promissory Note between the Registrant and certain officers of the Registrant in connection with
             the purchase of restricted stock.
 
  11.1*    Statement regarding computation of per share earnings.
 
  21.1*    Subsidiaries of the Registrant.
 
  23.1*    Independent Auditors' Consent and Report on Schedule.
 
  23.3*    Consent of Counsel (included in Exhibit 5.1).
 
  24.1*    Power of Attorney (included on page II-4).
 
  25.1     Statement of Eligibility of Trustee.
 
  27.1*    Financial Data Schedule.
 
  99.1     Form of Letter of Transmittal with respect to Exchange Offer.
 
  99.2     Form of Notice of Guaranteed Delivery.
 
  99.3     Form of Exchange Agreement.
</TABLE>
 
- ------------------------
 
*   Previously filed
 
+   Confidential Treatment granted

<PAGE>




                             CELLNET DATA SYSTEMS, INC.,

                                        and

                           THE BANK OF NEW YORK, as Trustee

                                    _______________

                             SECOND SUPPLEMENTAL INDENTURE

                              Dated as of August 30, 1996

                                         To

                                      INDENTURE

                                Dated as of June 15, 1995

                                    _______________

                                      Relating to

                                CellNet Data Systems, Inc.
 
                                13% Senior Discount Notes

                                        Due 2005

                             Series B 13% Senior Discount Notes

                                        Due 2005



<PAGE>

     SECOND SUPPLEMENTAL INDENTURE (the "Second Supplemental Indenture"), 
dated as of August 30, 1996, between CellNet Data Systems, Inc., a Delaware 
corporation (the "Surviving Corporation"), and The Bank of New York, a New 
York banking corporation (the "Trustee").


                                     RECITALS:

     WHEREAS, CellNet Data Systems, Inc., a California corporation (the 
"Company"), has duly issued its 13% Senior Discount Notes Due 2005 
(hereinafter called the "Notes") in the aggregate principal amount at 
maturity of $325,000,000 pursuant to an Indenture, dated as of June 15, 1995, 
between the Company and the Trustee and a First Supplemental Indenture dated 
as of November 21, 1995 by and between Company and the Trustee (such 
Indenture, as modified by such First Supplemental Indenture, hereafter the 
"Indenture"); and

     WHEREAS, the Company and the Surviving Corporation have entered into 
that certain Agreement and Plan of Merger, dated as of August 30, 1996, 
pursuant to which the Company and the Surviving Corporation will combine into 
a single company through the statutory merger of the Company with and into 
the Surviving Corporation (the "Merger"); and 

     WHEREAS, in the case of a merger of the Company with or into any other 
corporation, Article 5 of the Indenture requires that the surviving 
corporation execute and deliver to the Trustee a supplemental indenture 
providing the assumption by the surviving corporation of the covenants, 
agreements and obligations of the Company under the Indenture and the 
Registration Rights Agreement; and

     WHEREAS, Section 9.01 of the Indenture provides that the Company and the 
Trustee may, without the consent of any holders of Notes, enter into a 
supplemental indenture to comply with the terms of Article 5 of the 
Indenture; and 

     WHEREAS, in accordance with Sections 5.01(a)(iv) and 10.04 of the 
Indenture, the Company has delivered to the Trustee an Officers' Certificate 
and an Opinion of Counsel, each stating that the Merger and the Second 
Supplemental Indenture comply with the applicable provisions of the 
Indenture; and 

     WHEREAS, in accordance with Section 5.01 (a)(iv) of the Indenture, the 
Company has delivered to the Trustee a certificate from the Company's 
certified public accountants stating that the Surviving Corporation has made 
the calculations required by Section 5.01(a)(ii) and 5.01 (a)(iv) regarding 
the Debt to Cash Flow Ratio and that such calculations evidence compliance 
with such section; and


<PAGE>

     WHEREAS, all acts and proceedings required by law and under the 
Indenture to constitute this Second Supplemental Indenture, a valid and 
binding agreement for the uses and purposes set forth herein, in accordance 
with its terms, have been done and taken, and the execution and delivery of 
this Second Supplemental Indenture have been in all respects duly authorized 
by the Surviving Corporation; and

     WHEREAS, the foregoing recitals are made as representations of fact by 
the Surviving Corporation and not by the Trustee;


     NOW, THEREFORE, in consideration of the foregoing and for other good and 
valuable consideration, the receipt of which is hereby acknowledged, the 
Surviving Corporation and the Trustee hereby agree as follows:

     1.   All capitalized terms not otherwise defined herein shall have the 
meanings ascribed to them in the Indenture, and the Rules of Construction set 
forth in the Indenture shall likewise govern this Second Supplemental 
Indenture.

     2.   The Surviving Corporation hereby assumes all the covenants, 
agreements and obligations of the Company under the Notes, the Indenture and 
the Registration Rights Agreement, including the obligation to make due and 
punctual payment of the principal of and premium, if any, and interest on all 
of the Notes and the due and punctual performance of all of the covenants and 
conditions to be performed by the Company under the Indenture and the 
Registration Rights Agreement.  On or after the effective time of the Merger, 
all references in the Indenture to the "Company" shall be deemed to be 
references to CellNet Data Systems, Inc., a Delaware corporation.

     3.   Upon the execution and delivery of this Second Supplemental 
Indenture by the Trustee and the Surviving Corporation, the proposed 
agreements contained herein will become effective and operative.  Thereafter, 
all references to the Indenture shall, unless specifically referring to the 
Indenture as originally executed, be deemed to be references to the Indenture 
as modified by this Second Supplemental Indenture.

     4.   The recitals contained herein shall be taken as the statement of 
the Company and the Surviving Corporation, and the Trustee assumes no 
responsibility for the correctness of the same.  The Trustee makes no 
representation as to the validity of this Second Supplemental Indenture.  The 
Indenture, as supplemented and amended by this Second Supplemental Indenture, 
is in all respects hereby ratified and confirmed.

     5.   This Second Supplemental Indenture shall be binding upon and inure 
to the benefit of the parties hereto and their respective successors and 
assigns. Except as amended herein, the terms, provisions and covenants of the 
Indenture shall remain in full force and effect and continue to govern the 
parties thereto.


                                      -3-
<PAGE>

     6.   This Second Supplemental Indenture may be executed in two or more 
counterparts, each of which shall be deemed original and all of which 
together will constitute the same agreement, whether or not all parties 
execute each counterpart.

     7.   The laws of the State of New York, without regard to principles of 
conflicts of law, shall govern this Second Supplemental Indenture and the 
Notes.







                  [Remainder of Page Intentionally Left Blank]






                                      -4-
<PAGE>

     IN WITNESS WHEREOF, the parties have caused this Second Supplemental 
Indenture to be duly executed, all as of the date first above written.

                              CELLNET DATA SYSTEMS, INC.


                              By: /s/ David L. Perry
                                 --------------------------
                                 Name: David L. Perry
                                 Title: Vice President, General Counsel, 
                                        Secretary and Chief 
                                        Administrative Officer


                              THE BANK OF NEW YORK, as Trustee


                              By: /s/ Vivian Georges
                                 --------------------------
                                 Name: Vivian Georges
                                 Title: Assistant Vice President

<PAGE>
                                                                    EXHIBIT 4.16
 
    FOR PURPOSES OF SECTIONS 1272, 1273 AND 1275 OF THE INTERNAL REVENUE CODE OF
1986, AS AMENDED, AND THE RULES AND REGULATIONS THEREUNDER, THIS SECURITY IS
BEING ISSUED WITH ORIGINAL ISSUE DISCOUNT; FOR EACH $1,000 PRINCIPAL AMOUNT OF
THIS SECURITY, (1) THE ISSUE PRICE IS $450.398; (2) THE AMOUNT OF ORIGINAL ISSUE
DISCOUNT IS $1,199.602; (3) THE ISSUE DATE IS JUNE 15, 1995; AND (4) THE YIELD
TO MATURITY (COMPOUNDED SEMI-ANNUALLY) IS 15.04049098%.
 
                                                            CUSIP No.:
 
                           CELLNET DATA SYSTEMS, INC.
                   SERIES B 13% SENIOR DISCOUNT NOTE DUE 2005
 
No.                                                         $
 
    CELLNET DATA SYSTEMS, INC., a Delaware corporation (the "Company", which
term includes any successor entity), for value received promises to pay
to          or registered assigns, the principal sum of          Dollars, on
June 15, 2005.
 
    Interest Payment Dates: June 15 and December 15, commencing December 15,
2000
 
    Record Dates: June 1 and December 1
 
    Reference is made to the further provisions of this Note contained herein,
which will for all purposes have the same effect as if set forth at this place.
 
    IN WITNESS WHEREOF, the Company has caused this Note to be signed manually
or by facsimile by its duly authorized officers and a facsimile of its corporate
seal to be affixed hereto or imprinted hereon.
 
                                          CELLNET DATA SYSTEMS, INC.
                                          By:
                                          --------------------------------------
 
                                              Name:
                                              Title:
                                          By:
                                          --------------------------------------
 
                                              Name:
 
Dated:                                           Title:
 
Certificate of Authentication
 
    This is one of the Series B 13% Senior Discount Notes due 2005 referred to
in the within-mentioned Indenture.
 
                                          THE BANK OF NEW YORK,
                                            as Trustee
                                          By:
                                          --------------------------------------
 
Date of Authentication:                            Authorized Signatory



<PAGE>
                             (REVERSE OF SECURITY)
                   SERIES B 13% SENIOR DISCOUNT NOTE DUE 2005
 
    1.  INTEREST.  CELLNET DATA SYSTEMS, INC., a Delaware corporation (the
"Company"), promises to pay interest on the principal amount of this Note at the
rate per annum shown above. Cash interest on the Notes will not accrue prior to
June 15, 2000. Interest on the Notes will accrue from the most recent date on
which interest has been paid or, if no interest has been paid, from June 15,
2000. The Company will pay interest semi-annually in arrears on each Interest
Payment Date, commencing December 15, 2000. Interest will be computed on the
basis of a 360-day year of twelve 30-day months and, in the case of a partial
month, the actual number of days elapsed.
 
    The Company shall pay interest on overdue principal and on overdue
installments of interest from time to time on demand at the rate borne by the
Notes plus 2% per annum and on overdue installments of interest (without regard
to any applicable grace periods) to the extent lawful.
 
    2.  METHOD OF PAYMENT.  The Company shall pay interest on the Notes (except
defaulted interest) to the Persons who are the registered Holders at the close
of business on the Record Date immediately preceding the Interest Payment Date
even if the Notes are cancelled on registration of transfer or registration of
exchange after such Record Date. Holders must surrender Notes to a Paying Agent
to collect principal payments. The Company shall pay principal and interest in
money of the United States that at the time of payment is legal tender for
payment of public and private debts ("U.S. Legal Tender"). However, the Company
may pay principal and interest by its check payable in such U.S. Legal Tender.
The Company may deliver any such interest payment to the Paying Agent or to a
Holder at the Holder's registered address.
 
    3.  PAYING AGENT AND REGISTRAR.  Initially, The Bank of New York (the
"Trustee"), will act as Paying Agent and Registrar. The Company may change any
Paying Agent, Registrar or co-Registrar without notice to the Holders.
 
    4.  INDENTURE.  The Company issued the Notes under an Indenture, dated as of
June 15, 1995 (the "Indenture"), between the Company and the Trustee. This Note
is one of a duly authorized issue of Exchange Notes of the Company designated as
its Series B 13% Senior Discount Notes due 2005 (the "Exchange Notes"). The
Notes are limited in aggregate principal amount to $235,000,000. The Notes
include the 13% Senior Discount Notes due 2005 (the "Initial Notes") and the
Exchange Notes, issued in exchange for the Initial Notes pursuant to the
Indenture. The Initial Notes and the Exchange Notes are treated as a single
class of securities under the Indenture. Capitalized terms herein are used as
defined in the Indenture unless otherwise defined herein. The terms of the Notes
include those stated in the Indenture and those made part of the Indenture by
reference to the Trust Indenture Act of 1939 (15 U.S. Code SectionSection
77aaa-77bbbb) (the "TIA"), as in effect on the date of the Indenture.
Notwithstanding anything to the contrary herein, the Notes are subject to all
such terms, and Holders of Notes are referred to the Indenture and said Act for
a statement of them. The Notes are general unsecured obligations of the Company.
 
    5.  INDENTURE.  Each Holder, by accepting a Note, agrees to be bound by all
of the terms and provisions of the Indenture, as the same may be amended from
time to time in accordance with its terms.
 
    6.  REDEMPTION.  a. OPTIONAL REDEMPTION.  The Notes will be redeemable, at
the Company's option, in whole at any time or in part from time to time, on and
after June 15, 2000 at the following redemption prices (expressed as percentages
of the aggregate principal amount) if redeemed during the twelve-month
<PAGE>
period commencing on June 15 of the year set forth below, plus, in each case,
accrued and unpaid interest thereon, if any, to the date of redemption:
 
<TABLE>
<CAPTION>
YEAR                                                            PERCENTAGE
- --------------------------------------------------------------  -----------
<S>                                                             <C>
2000..........................................................     106.500%
2001..........................................................     104.330
2002..........................................................     102.170
2003 and thereafter...........................................     100.000
</TABLE>
 
    b.  OPTIONAL REDEMPTION UPON PUBLIC EQUITY.  In the event that the Company
consummates a Public Equity Offering after which there is a Public Market, the
Company may, at its option, redeem prior to June 15, 1998, from the proceeds of
such Public Equity Offering received by the Company, up to 25% of the aggregate
principal amount of the Notes originally issued at a redemption price equal to
113% of the Accreted Value plus accrued interest, if any, to the date of
redemption; provided, HOWEVER, that (1) such redemption may only be effected to
the extent that immediately after such redemption not less than 75% in aggregate
principal amount of the Notes originally issued remain outstanding (it being
expressly agreed that, for purposes of determining whether this condition is
satisfied, Notes owned (beneficially or otherwise) by the Company or any of its
Affiliates shall not be deemed to be outstanding) and (2) such redemption is
effected not more than once and not more than 60 days after the consummation of
such Public Equity Offering.
 
    The Notes are not entitled to the benefit of any sinking fund.
 
    7.  NOTICE OF REDEMPTION.  Notice of redemption will be mailed at least 30
days but not more than 60 days before the Redemption Date to each Holder of
Notes to be redeemed at such Holder's registered address. Notes in denominations
larger than $1,000 may be redeemed in part.
 
    Except as set forth in the Indenture, if monies for the redemption of the
Notes called for redemption shall have been deposited with the Paying Agent for
redemption on such Redemption Date, then, unless the Company defaults in the
payment of such Redemption Price plus accrued interest, if any, the Notes called
for redemption will cease to bear interest or accumulate Accreted Value, as the
case may be, from and after such Redemption Date and the only right of the
Holders of such Notes will be to receive payment of the Redemption Price plus
accrued interest, if any.
 
    8.  OFFERS TO PURCHASE.  Sections 4.15 and 4.16 of the Indenture provide
that, after certain Asset Sales (as defined in the Indenture) and upon the
occurrence of a Change of Control (as defined in the Indenture), and subject to
further limitations contained therein, the Company will make an offer to
purchase certain amounts of the Notes in accordance with the procedures set
forth in the Indenture.
 
    9.  DENOMINATIONS; TRANSFER; EXCHANGE.  The Notes are in registered form,
without coupons, and (except Notes issued as payment of Interest) in
denominations of $1,000 and integral multiples of $1,000. A Holder shall
register the transfer of or exchange Notes in accordance with the Indenture. The
Registrar may require a Holder, among other things, to furnish appropriate
endorsements and transfer documents and to pay certain transfer taxes or similar
governmental charges payable in connection therewith as permitted by the
Indenture. The Registrar need not register the transfer of or exchange of any
Notes or portions thereof selected for redemption.
 
    10.  PERSONS DEEMED OWNERS.  The registered Holder of a Note shall be
treated as the owner of it for all purposes.
 
    11.  UNCLAIMED MONEY.  If money for the payment of principal or interest
remains unclaimed for one year, the Trustee and the Paying Agent will pay the
money back to the Company. After that, all liability of the Trustee and such
Paying Agent with respect to such money shall cease.
 
    12.  DISCHARGE PRIOR TO REDEMPTION OR MATURITY.  If the Company at any time
deposits with the Trustee U.S. Legal Tender or U.S. Government Obligations
sufficient to pay the principal of and interest on the Notes to redemption or
maturity and complies with the other provisions of the Indenture relating
thereto,
<PAGE>
the Company will be discharged from certain provisions of the Indenture and the
Notes (including certain covenants, but excluding its obligation to pay the
principal of and interest on the Notes).
 
    13.  AMENDMENT; SUPPLEMENT; WAIVER.  Subject to certain exceptions set forth
in the Indenture, the Indenture or the Notes may be amended or supplemented with
the written consent of the Holders of not less than a majority in aggregate
principal amount of the Notes then outstanding, and any past Default or Event of
Default or noncompliance with any provision may be waived with the written
consent of the Holders of not less than a majority in aggregate principal amount
of the Notes then outstanding. Without notice to or consent of any Holder, the
parties thereto may amend or supplement the Indenture or the Notes to, among
other things, cure any ambiguity, defect or inconsistency, provide for
uncertificated Notes in addition to or in place of certificated Notes, or comply
with Article Five of the Indenture or make any other change that does not
adversely affect the rights of any Holder of a Note.
 
    14.  RESTRICTIVE COVENANTS.  The Indenture imposes certain limitations on
the ability of the Company and the Restricted Subsidiaries to, among other
things, Incur additional Indebtedness, make payments in respect of its Capital
Stock or certain Indebtedness, make certain Investments, create or incur liens,
enter into transactions with Affiliates, create dividend or other payment
restrictions affecting Restricted Subsidiaries, issue Preferred Stock of its
Restricted Subsidiaries, and on the ability of the Company and its Subsidiaries
to merge or consolidate with any other Person or sell, assign, transfer, lease,
convey or otherwise dispose of all or substantially all of the Company's and its
Subsidiaries, assets or adopt a plan of liquidation. Such limitations are
subject to a number of important qualifications and exceptions. Pursuant to
Section 4.06 of the Indenture, the Company must annually report to the Trustee
on compliance with such limitations.
 
    15.  SUCCESSORS.  When a successor assumes, in accordance with the
Indenture, all the obligations of its predecessor under the Notes and the
Indenture, the predecessor, subject to certain exceptions, will be released from
those obligations.
 
    16.  DEFAULTS AND REMEDIES.  If an Event of Default occurs and is
continuing, the Trustee or the Holders of not less than 25% in aggregate
principal amount of Notes then outstanding may declare all the Notes to be due
and payable in the manner, at the time and with the effect provided in the
Indenture. Holders of Notes may not enforce the Indenture or the Notes except as
provided in the Indenture. The Trustee is not obligated to enforce the Indenture
or the Notes unless it has received indemnity reasonably satisfactory to it. The
Indenture permits, subject to certain limitations therein provided Holders of a
majority in aggregate principal amount of the Notes then outstanding to direct
the Trustee in its exercise of any trust or power. The Trustee may withhold from
Holders of Notes notice of any continuing Default or Event of Default (except a
Default in payment of principal or interest when due, for any reason or a
Default in compliance with Article Five of the Indenture) if it determines that
withholding notice is in their interest.
 
    17.  TRUSTEE DEALINGS WITH COMPANY.  The Trustee under the Indenture, in its
individual or any other capacity may become the owner or pledgee of Notes and
may otherwise deal with the Company, its Subsidiaries or their respective
Affiliates as if it were not the Trustee.
 
    18.  NO RECOURSE AGAINST OTHERS.  No stockholder, director, officer,
employee or incorporator, as such, of the Company shall have any liability for
any obligation of the Company under the Notes or the Indenture or for any claim
based on, in respect of or by reason of, such obligations or their creation.
Each Holder of a Note by accepting a Note waives and releases all such
liability. The waiver and release are part of the consideration for the issuance
of the Notes.
 
    19.  AUTHENTICATION.  This Note shall not be valid until the Trustee or
Authenticating Agent manually signs the certificate of authentication on this
Note.
 
    20.  GOVERNING LAW.  This Note and the Indenture shall be governed by and
construed in accordance with the laws of the State of New York, as applied to
contracts made and performed within the State of New York, without regard to
principles of conflict of laws.
<PAGE>
    21.  ABBREVIATIONS AND DEFINED TERMS.  Customary abbreviations may be used
in the name of a Holder of a Note or an assignee, such as: TEN COM (= tenants in
common), TEN ENT (= tenants by the entireties), JT TEN (= joint tenants with
right of survivorship and not as tenants in common), CUST (= Custodian), and
U/G/M/A (= Uniform Gifts to Minors Act).
 
    22.  CUSIP NUMBERS.  Pursuant to a recommendation promulgated by the
Committee on Uniform Security Identification Procedures, the Company has caused
CUSIP numbers to be printed on the Notes as a convenience to the Holders of the
Notes. No representation is made as to the accuracy of such numbers as printed
on the Notes and reliance may be placed only on the other identification numbers
printed hereon.
 
    The Company will furnish to any Holder of a Note upon written request and
without charge a copy of the indenture which has the text of this Note in larger
type. Requests may be made to: CellNet Data Systems, Inc., 125 Shoreway Road,
San Carlos, California 94070, Attn: General Counsel.


<PAGE>
                                ASSIGNMENT FORM
 
    If you the Holder want to assign this Note, fill in the form below and have
your signature guaranteed:
 
I or we assign and transfer this Note to:
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
                 (Print or type name, address and zip code and
                 social security or tax ID number of assignee)
 
and irrevocably appoint
- -------------------------------------------------------------------, agent to
transfer this Note on the books of the Company. The agent may substitute another
to act for him.
 
<TABLE>
<S>                           <C>
Dated: --------------------   Signed: -------------------------------------
                              (Sign exactly as name appears on the other
                              side of this Note)
</TABLE>
 
Signature Guarantee:
- ----------------------------------




<PAGE>

- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
                                FORM T-1
                   SECURITIES AND EXCHANGE COMMISSION
                        WASHINGTON, D.C.  20549

                         STATEMENT OF ELIGIBILITY
               UNDER THE TRUST INDENTURE ACT OF 1939 OF A 
                CORPORATION DESIGNATED TO ACT AS TRUSTEE

                   CHECK IF AN APPLICATION TO DETERMINE
                   ELIGIBILITY OF A TRUSTEE PURSUANT TO
                     SECTION 305(b)(2)            / /

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

                             THE BANK OF NEW YORK
             (Exact name of trustee as specified in its charter)

NEW YORK                                             13-5160382
(State of incorporation                              (I.R.S. employer
if not a U.S. national bank)                         identification no.)

48 Wall Street, New York, N.Y.                       10286        
(Address of principal executive offices)             (Zip code)

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

                        CELLNET DATA SYSTEMS, INC.
          (Exact name of obligor as specified in its charter)

Delaware                                              94-2951096
(State or other jurisdiction of                       (I.R.S. employer
incorporation or organization)                        identification no.)

125 Shoreway Road
San Carlos, California                                 94070
(Address of principal executive offices)              (Zip code)

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

              13% Senior Discount Notes due 2005, Series B
                  (Title of the indenture securities)

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

<PAGE>

1.  GENERAL INFORMATION.  FURNISH THE FOLLOWING INFORMATION AS TO THE TRUSTEE:

    (A)  NAME AND ADDRESS OF EACH EXAMINING OR SUPERVISING AUTHORITY TO WHICH 
         IT IS SUBJECT.

- -------------------------------------------------------------------------------
             Name                                            Address

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

    Superintendent of Banks of the State of         2 Rector Street, New York,
    New York                                        N.Y.  10006, and Albany, 
                                                    N.Y.  12203

    Federal Reserve Bank of New York                33 Liberty Plaza, New York
                                                    N.Y.  10045

    Federal Deposit Insurance Corporation           Washington, D.C.  20429

    New York Clearing House Association             New York, New York

    (B)  WHETHER IT IS AUTHORIZED TO EXERCISE CORPORATE TRUST POWERS.

    YES.

2.  AFFILIATIONS WITH OBLIGOR

    IF THE OBLIGOR IS AN AFFILIATE OF THE TRUSTEE, DESCRIBE EACH SUCH 
    AFFILIATION.

    None.  (See Note on page 3.)

16. LIST OF EXHIBITS.

    EXHIBITS IDENTIFIED IN PARENTHESES BELOW, ON FILE WITH THE COMMISSION, ARE
    INCORPORATED HEREIN BY REFERENCE AS AN EXHIBIT HERETO, PURSUANT TO RULE 
    7a-29 UNDER THE TRUST INDENTURE ACT OF 1939 (THE "ACT") AND RULE 24 OF THE
    COMMISSION'S RULES OF PRACTICE.

    1.  A copy of the Organization Certificate of The Bank of New York 
        (formerly Irving Trust Company) as now in effect, which contains 
        the authority to commence business and a grant of powers to exercise
        corporate trust powers.  (Exhibit 1 to Amendment No. 1 to Form T-1    
        filed with Registration Statement No. 33-6215, Exhibits 1a and 1b to 
        Form T-1 filed with Registration Statement No. 33-21672 and Exhibit 1 to
        Form T-1 filed with Registration Statement No. 33-29637.

    4.  A copy of the existing By-laws of the Trustee.  (Exhibit 4 to Form T-1
        filed with Registration Statement No. 33-31019.)


                                      -2-

<PAGE>
    
    6.  The consent of the Trustee required by Section 321(b) of the Act.
        (Exhibit 6 to Form T-1 filed with Registration Statement No. 
        33-44051.) 

    7.  A copy of the latest report of condition of the Trustee published 
        pursuant to law or to the requirements of its supervising or examining
        authority.

                                      NOTE

    Inasmuch as this Form T-1 is filed prior to the ascertainment by the 
Trustee of all facts on which to base a responsive answer to Item 2, the 
answer to said Item is based on incomplete information.

    Item 2 may, however, be considered as correct unless amended by an 
amendment to this Form T-1.



                                       -3-

<PAGE>

                                  SIGNATURE



    Pursuant to the requirements of the Act, the Trustee, The Bank of New 
York, a corporation organized and existing under the laws of the State of New 
York, has duly caused this statement of eligibility to be signed on its 
behalf by the undersigned, thereunto duly authorized, all in The City of New 
York, and State of New York, on the 27th day of December, 1996.

                                       THE BANK OF NEW YORK



                                       By: /s/ Paul J. Schmalzel
                                           ---------------------
                                           Name:  Paul J. Schmalzel
                                           Title:  Assistant Treasurer



                                      -4-


<PAGE>

                                LETTER OF TRANSMITTAL

                              CELLNET DATA SYSTEMS, INC.

                              OFFER FOR ALL OUTSTANDING
                         13% SENIOR NOTES DUE 2005, SERIES A

                                   IN EXCHANGE FOR
                         13% SENIOR NOTES DUE 2005, SERIES B

                    PURSUANT TO THE PROSPECTUS, DATED     , 1996.

THE EXCHANGE OFFER WILL EXPIRE AT 6:00 P.M. NEW YORK CITY TIME, ON
                    , 1997, UNLESS EXTENDED (THE "EXPIRATION DATE").  TENDERS
MAY BE WITHDRAWN PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION DATE.

                                 THE BANK OF NEW YORK

<TABLE>
<CAPTION>

BY REGISTERED OR CERTIFIED MAIL:  FACSIMILE TRANSMISSION NUMBER:      BY HAND/OVERNIGHT DELIVER:
<S>                               <C>                                <C>
                                        (212) 571-3080
     The Bank of New York                                                 The Bank of New York
    101 Barclay Street - 7E       (For Eligible Institutions Only)        101 Barclay Street
 New York, New York  10286             Confirm by Telephone:         Corporate Trust Services Window
 Attn.: Reorganization Section           (212) 815-6333                      Ground Level
        Arwen Gibbens                                                 Attn.: Reorganization Section
 New York, New York  10285             For Information Call:
                                          (212) 815-6333

</TABLE>
 
    DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE, OR
TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE OTHER THAN AS SET FORTH ABOVE, WILL
NOT CONSTITUTE A VALID DELIVERY.

    The undersigned acknowledges that he or she has received the Prospectus, 
dated ____________, 1996 (the "Prospectus") of CellNet Data Systems, Inc., a 
Delaware corporation (the "Company"), and this Letter of Transmittal (the 
"Letter"), which together constitute the Company's offer (the "Exchange 
Offer") to exchange an aggregate principal amount at maturity of up to 
$325,000,000 13% Senior Notes, due 2005, Series B (the "New Notes") of the 
Company for a like principal amount at maturity of the issued and outstanding 
13% Senior Notes, due 2005, Series A (the "Old Notes") of the Company from 
the holders thereof.

    This Letter of Transmittal is to be used if certificates for the Old Notes
are to be forwarded herewith.  If delivery of the Old Notes is to be made
through book-entry transfer into the Exchange Agent's account at the Depository
Trust Company ("DTC"), this Letter of Transmittal need not be delivered;
PROVIDED, HOWEVER, that tenders of the Old Notes must be effected in accordance
with DTC's Automated Tender Offer Program ("ATOP") procedures and the procedures
set forth in the Prospectus under the caption "The Exchange Offer--Procedures
for Tendering--Book Entry Transfer."

    For each Old Note accepted for exchange, the holder of such Old Note will
receive a New Note having a principal amount at maturity equal to that of the
surrendered Old Note.  Interest on the New Notes will accrue from the last
interest payment date on which interest was paid on the Old Notes surrendered in
exchange therefor


<PAGE>

or, if no interest has been paid on the Old Notes, from the date of the original
issue of the Old Notes.  If by _____________ 1996, neither an Exchange Offer
with respect to the Old Notes has been consummated nor a shelf registration
statement with respect to the Old Notes has been declared effective, interest
will accrue on each Old Note, from and including the date of original issue of
such Old Note until but excluding the earlier of the date of consummation of an
Exchange Offer and the effective date of a shelf registration statement at a
rate of .50% per annum in addition to the interest rate set forth above.
Holders of Old Notes accepted for exchange will be deemed to have waived the
right to receive any other payments or accrued interest on the Old Notes.  The
Company reserves the right, at any time or from time to time, to extend the
Exchange Offer at its discretion, in which event the term "Expiration Date"
shall mean the latest time and date to which the Exchange Offer is extended.
The Company shall notify the holders of the Old Notes of any extension by means
of a press release or other public announcement prior to 9:00 A.M., New York
City time, on the next business day after the previously scheduled Expiration
Date.

    This Letter is to be completed by a holder of Old Notes either if 
certificates are to be forwarded herewith or if a tender of certificates for 
Old Notes, if available, is to be made by book-entry transfer to the account 
maintained by the Exchange Agent at The Depository Trust Company (the 
"Book-Entry Transfer Facility") pursuant to the procedures set forth in "The 
Exchange Offer--Book-Entry Transfer" section of the Prospectus. Holders 
of Old Notes whose certificates are not immediately available, or who are 
unable to deliver their certificates or confirmation of the book-entry tender 
of their Old Notes into the Exchange Agent's account at the Book-Entry Transfer 
Facility (a "Book-Entry Confirmation") and all other documents by this Letter 
to the Exchange Agent on or prior to the Expiration Date, must tender their 
Old Notes according to the guaranteed delivery procedures set forth in "The 
Exchange Offer--Guaranteed Delivery Procedures" section of the Prospectus.  
See Instruction 1. Delivery of documents to the Book-Entry Transfer Facility 
does not constitute delivery to the Exchange Agent.

    The undersigned has completed the appropriate boxes below and signed this 
Letter to indicate the action undersigned desires to take with respect to the 
Exchange Offer.

                                         -2-

<PAGE>

    List below the Old Notes to which this Letter relates.  If the space
provided below is inadequate, the certificate numbers and principal amount at
maturity of Old Notes should be listed on a separate signed schedule affixed
hereto.
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------
DESCRIPTION OF OLD NOTES                         |    1         |    2         |    3      |
- -------------------------------------------------|--------------|--------------|-----------|
<S>                                              <C>            <C>            <C>
                                                 |              | Aggregate    |           |
                                                 |              | Principal    | Principal |
                                                 |              | Amount of    | Amount at |
Name(s) and Address(es) of Registered Holder(s)  | Certificate* | Maturity of  | Maturity  |
       (Please fill in, if blank)                | Number(s)    | Old Note(s)  | Tendered**|
- -------------------------------------------------|--------------|--------------|-----------|
                                                 |              |              |           |
                                                 |--------------|--------------|-----------|
                                                 |              |              |           |
                                                 |--------------|--------------|-----------|
                                                 |              |              |           |
                                                 |--------------|--------------|-----------|
                                                 | Total        |              |           |
- --------------------------------------------------------------------------------------------

</TABLE>
 *   Need not be completed if Old Notes are being tendered by book entry
    transfer.
**  Unless otherwise indicated in this column, a holder will be deemed to have
    transferred ALL of the Old Notes represented by the Old Notes indicated in
    column 2.  See Instruction 2.  Old Notes tendered hereby must be in
    denominations of principal amount at maturity of $1,000 and any integral
    multiple thereof.  See Instruction 1.

/ / CHECK HERE IF TENDERED OLD NOTES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER
    MADE TO THE ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH THE BOOK-ENTRY
    TRANSFER FACILITY AND COMPLETE THE FOLLOWING:

    Name of Tendering Institution ________________________________________

    Account Number ____________________  Transaction Code Number _________

/ / CHECK HERE IF TENDERED OLD NOTES ARE BEING DELIVERED PURSUANT TO A NOTICE
    OF GUARANTEED DELIVERY PREVIOUSLY SENT TO THE EXCHANGE AGENT AND COMPLETE
    THE FOLLOWING:

    Name(s) of Registered Holder(s) ___________________________________________

    Window Ticket Number (if any) _____________________________________________

    Date of Execution of Notice of Guaranteed Delivery ________________________

    Name of Institution which guaranteed delivery _____________________________

    If Delivered by Book-Entry Transfer, Complete the Following:

    Account Number___________________  Transaction Code Number ________________

/ / CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
    COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS
    THERETO.

Name: __________________________________________________________________________

Address: ______________________________________________________________________

         ______________________________________________________________________


                                         -3-

<PAGE>
                           PLEASE READ THIS ENTIRE LETTER OF
                            TRANSMITTAL CAREFULLY AND FOLLOW 
                             THE INSTRUCTIONS BEGINNING ON 
                                     PAGE 6 HEREOF.

Ladies and Gentlemen:

    Upon the terms and subject to the conditions of the Exchange Offer, the
undersigned hereby tenders to the Company the aggregate principal amount at
maturity of Old Notes indicated above.  Subject to, and effective upon, the
acceptance for exchange of the Old Notes tendered hereby, the undersigned hereby
sells, assigns and transfers to, or upon the order of, the Company all right,
title and interest in and to such Old Notes as are being tendered hereby.

    The undersigned hereby represents and warrants that the undersigned has
full power and authority to tender, sell, assign and transfer the Old Notes
tendered hereby and that the Company will acquire good and unencumbered title
thereto, free and clear of all liens, restrictions, charges and encumbrances and
not subject to any adverse claim when the same are accepted by the Company.  The
undersigned hereby further represents that any New Notes acquired in exchange
for Old Notes tendered hereby will have been acquired in the ordinary course of
business of the person receiving each New Note, whether or not such person is
the undersigned, that neither the holder of such Old Notes nor any such other
person has an arrangement or understanding with any person to participate in the
distribution of such New Notes and that neither the holder of such Old Notes nor
any such other person is an "affiliate," as defined in Rule 405 under the
Securities Act of 1933, as amended (the "Securities Act"), of the Company.

    The undersigned also acknowledges that this Exchange Offer is being made in
reliance on an interpretation by the staff of the Securities and Exchange
Commission (the "SEC") that the New Notes issued in exchange for the Old Notes
pursuant to the Exchange Offer may be offered for resale, resold or otherwise
transferred by holders thereof (other than any such holder that is an
"affiliate" of the Company within the meaning of Rule 405 under the Securities
Act), without compliance with the registration and prospectus delivery
provisions of the Securities Act, provided that such New Notes are acquired in
the ordinary course of such holders' business and such holders have no
arrangements with any person to participate in the distribution of such New
Notes.  If the undersigned is not a broker-dealer, the undersigned represents
that it is not engaged in, and does not intend to engage in, a distribution of
New Notes.  If the undersigned is a broker-dealer that will receive New Notes
for its own account in exchange for Old Notes that were acquired as a result of
market-making activities or other trading activities, it acknowledges that it
will deliver a prospectus in connection with any resale of such New Notes;
however, by so acknowledging and delivering a prospectus, the undersigned will
not be deemed to admit that it is an "underwriter" within the meaning of the
Securities Act.

    The Undersigned will, upon request, execute and deliver any additional 
documents deemed by the Company to be necessary or desirable to complete the 
sale, assignment and transfer of the Old Notes tendered hereby.  All 
authority conferred or agreed to be conferred in this Letter and every 
obligation of the undersigned hereunder shall be binding upon the successors, 
assigns, heirs, executors, administrators, trustees in bankruptcy and legal 
representatives of the undersigned and shall not be affected by, and shall 
survive, the death or incapacity of the undersigned.  This tender may be 
withdrawn only in accordance with the procedures set forth in "The Exchange 
Offer--Withdrawal of Tenders" section of the Prospectus.

    Unless otherwise indicated herein in the box entitled "Special Issuance 
Instructions" below, please deliver the New Notes (and, if applicable, 
substitute certificates representing Old Notes for any Old Notes not 
exchanged) in the name of the undersigned or, in the case of a book-entry 
delivery of Old Notes, please credit the account indicated above maintained 
at the Book-Entry Transfer Facility.  Similarly, unless otherwise indicated 
under the box entitled "Special Delivery Instructions" below, please send the 
New Notes (and, if applicable, substitute certificates representing Old Notes 
for any Old Notes not exchanged) to the undersigned at the address shown 
above in the box entitled "Description of Old Notes."

                                         -4-

<PAGE>

    THE UNDERSIGNED, BY COMPLETING THE BOX ENTITLED "DESCRIPTION OF OLD 
NOTES" ABOVE AND SIGNING THIS LETTER, WILL BE DEEMED TO HAVE TENDERED THE OLD 
NOTES AS SET FORTH IN SUCH BOX ABOVE.

                                         -5-

<PAGE>

                     INSTRUCTIONS TO LETTER OF TRANSMITTAL
                    FORMING PART OF THE TERMS AND CONDITIONS 
                             OF THE EXCHANGE OFFER

1.  Delivery of this Letter and Notes; Guaranteed Delivery Procedures.

    This Letter is to be completed by noteholders either if certificates are to
be forwarded herewith or if tenders are to be made pursuant to the procedures
for delivery of book-entry transfer set forth in "The Exchange Offer--Book Entry
Transfer" section of the Prospectus.  Certificates for all physically tendered
Old Notes, or Book-Entry Confirmation, as the case may be, as well as a properly
completed and duly executed Letter (or manually signed facsimile hereof) and any
other documents required by this Letter, must be received by the Exchange Agent
at the address set forth herein on or prior to the Expiration Date, or the
tendering holder must comply with the guaranteed delivery procedures set forth
below.  Old Notes tendered hereby must be in denominations of principal amount
of maturity of $1,000 and any integral multiple thereof.

    Noteholders whose certificates for Old Notes are not immediately available
or who cannot deliver their certificates and all other required documents to the
Exchange Agent on or prior to the Expiration Date, or who cannot complete the
procedure for book-entry transfer on a timely basis, may tender their Old Notes
pursuant to the guaranteed delivery procedures set forth in "The Exchange
Offer--Guaranteed Delivery Procedures" section of the Prospectus.  Pursuant to
such procedures, (i) such tender must be made through an Eligible Institution,
(ii) prior to the Expiration Date, the Exchange Agent must receive from such
Eligible Institution a properly completed and duly executed Letter (or a
facsimile thereof) and Notice of Guaranteed Delivery, substantially in the form
provided by the Company (by facsimile transmission, mail or hand delivery),
setting forth the name and address of the holder of Old Notes tendered, stating
that the tender is being made thereby and guaranteeing that within five New York
Stock Exchange ("NYSE") trading days after the date of execution of the Notice
of Guaranteed Delivery, the certificates for all physically tendered Old Notes,
or a Book-Entry Confirmation, and any other documents required by the Letter
will be deposited by the Eligible Institution with the Exchange Agent, and
(iii) the certificates for all physically tendered Old Notes, in proper form for
transfer, or Book-Entry Confirmation, as the case may be, and all other
documents required by this Letter, are received by the Exchange Agent within
five NYSE trading days after the date of execution of the Notice of Guaranteed
Delivery.

         The method of delivery of this Letter, the Old Notes and all other
required documents is at the election and risk of the tendering holders, but the
delivery will be deemed made only when actually received or confirmed by the
Exchange Agent.  If Old Notes are sent by mail, it is suggested that the mailing
be made sufficiently in advance of the Expiration Date to permit the delivery to
the Exchange Agent prior to 5:00 p.m., New York City time, on the Expiration
Date.

         See "The Exchange Offer" section in the Prospectus.

2.  Partial Tenders (not applicable to noteholders who tender by book-entry
transfer).

    If less than all of the Old Notes evidenced by a submitted certificate are
to be tendered, the tendering holder(s) should fill in the aggregate principal
amount at maturity of Old Notes to be tendered in the box above entitled
"Description of Old Notes--Principal Amount at Maturity Tendered."  A reissued
certificate representing the balance of nontendered Old Notes will be sent to
such tendering holder, unless otherwise provided in the appropriate box on this
Letter, promptly after the Expiration Date.  All of the Old Notes delivered to
the Exchange Agent will be deemed to have been tendered unless otherwise
indicated.

3.  Signatures on this Letter; Bond Powers and Endorsements; Guarantee of
Signatures.

    If this Letter is signed by the registered holder of the Old Notes tendered
hereby, the signature must correspond exactly with the name as written on the
face of the certificates without any change whatsoever.


                                         -6-

<PAGE>

    If any tendered Old Notes are owned of record by two or more joint owners,
all such owners must sign this Letter.

    If any tendered Old Notes are registered in different names on several
certificates, it will be necessary to complete, sign and submit as many separate
copies of this Letter as there are different registrations of certificates.

    When this Letter is signed by the registered holder or holders of the Old
Notes specified herein and tendered hereby, no endorsements of certificates or
separate bond powers are required.  If, however, the New Notes are to be issued,
or any untendered Old Notes are to be reissued, to a person other than the
registered holder, then endorsements of any certificates transmitted hereby or
separate bond powers are required.  Signatures on such certificate(s) must be
guaranteed by an Eligible Institution.

    If this Letter is signed by a person other than the registered holder or
holders of any certificate(s) specified herein, such certificate(s) must be
endorsed or accompanied by appropriate bond powers, in either case signed
exactly as the name or names of the registered holder or holders appear(s) on
the certificate(s) and signatures on such certificate(s) must be guaranteed by
an Eligible Institution.

    If this Letter or any certificates or bond powers are signed by trustees, 
executors, administrators, guardians, attorneys-in-fact, officers of 
corporations or others acting in a fiduciary or representative capacity, such 
persons should so indicate when signing, and, unless waived by the Company, 
proper evidence satisfactory to the Company of their authority to so act must 
be submitted.

    Endorsements on certificates for Old Notes or signatures on bond powers
required by this Instruction 3 must be guaranteed by a firm which is a member of
a registered national securities exchange or a member of the National
Association of Securities Dealers, Inc. or by a commercial bank or trust company
having an office or correspondent in the United States or by such other Eligible
Institution within the meaning of Rule 17(A)(d)-15 under the Securities Exchange
Act of 1934, as amended (collectively "Eligible Institutions").

    Signatures on this Letter need not be guaranteed by an Eligible
Institution, provided the Old Notes are tendered:  (i) by a registered holder of
Old Notes (which term, for purposes of the Exchange Offer, includes any
participant in the Book-Entry Transfer Facility system whose name appears on a
security position listing as the holder of such Old Notes) tendered who has not
completed the box entitled "Special Issuance Instructions" or "Special Delivery
Instructions" on this Letter, or (ii) for the account of an Eligible
Institution.

4.  Special Issuance and Delivery Instructions.

    Tendering holders of Old Notes should indicate in the applicable box the
name and address to which New Notes issued pursuant to the Exchange Offer and/or
substitute certificates evidencing Old Notes not exchanged are to be issued or
sent, if different from the name or address of the person signing this Letter.
In the case of issuance in a different name, the employer identification or
social security number of the person named must also be indicated.  Noteholders
tendering Old Notes by book-entry transfer may request that Old Notes not
exchanged be credited to such account maintained at the Book-Entry Transfer
Facility as such noteholder may designate hereon.  If no such instructions are
given, such Old Notes not exchanged will be returned to the name and address of
the person signing this Letter.


                                         -7-

<PAGE>

5.  Tax Identification Number.

    Federal income tax law generally requires that a tendering holder whose Old
Notes are accepted for exchange must provide the Company (as payor) with such
holder's correct Taxpayer Identification Number ("TIN") on Substitute Form W-9
below, which in the case of a tendering holder who is an individual, is his or
her social security number.  If the Company is not provided with the current TIN
or an adequate basis for an exemption, such tendering holder may be subject to a
$50 penalty imposed by the Internal Revenue Service.  In addition, delivery to
such tendering holder of New Notes may be subject to backup withholding in an
amount equal to 31% of all reportable payments made after the exchange.  If
withholding results in an overpayment of taxes, a refund may be obtained.

    Exempt holders of Old Notes (including, among others, all corporations and
certain foreign individuals) are not subject to these backup withholding and
reporting requirements.  See the enclosed Guidelines for Certification of
Taxpayer Identification Number on Substitute Form W-9 (the "W-9 Guidelines") for
additional instructions.

    To prevent backup withholding, each tendering holder of Old Notes must
provide its correct TIN by completing the "Substitute Form W-9" set forth below,
certifying that the TIN provided is correct (or that such holder is awaiting a
TIN) and that (i) the holder is exempt from backup withholding, or (ii) the
holder has not been notified by the Internal Revenue Service that such holder is
subject to a backup withholding as a result of a failure to report all interest
or dividends or (iii)) the Internal Revenue Services has notified the holder
that such holder is no longer subject to backup withholding.  If the tendering
holder of Old Note is a nonresident alien or foreign entity not subject to
backup withholding, such holder must give the Company a completed Form W-8,
Certificate of Foreign Status.  These forms may be obtained from the Exchange
Agent.  If the Old Notes are in more than one name or are not in the name of the
actual owner, such holder should consult the W-9 Guidelines for information on
which TIN to report.  If such holder does not have a TIN, such holder should
consult the W-9 Guidelines for instructions on applying for a TIN, check the box
in Part 2 of the Substitute Form W-9 and write "applied for" in lieu of its TIN.
Note:  Checking this box and writing "applied for" on the form means that such
holder has already applied for a TIN or that such holder intends to apply for
one in the near future.  If such holder does not provide its TIN to the Company
within 60 days, backup withholding will begin and continue until such holder
furnishes its TIN to the Company.

6.  Transfer Taxes.

    The Company will pay all transfer taxes, if any, applicable to the transfer
of Old Notes to it or its order pursuant to the Exchange Offer.  If, however,
New Notes and/or substitute Old Notes not exchanged are to be delivered to, or
are to be registered or issued in the name of, any person other than the
registered holder of the Old Notes tendered hereby, or if tendered Old Notes are
registered in the name of any person other than the person signing this Letter,
or if a transfer tax is imposed for any reason other than the transfer of Old
Notes to the Company or its order pursuant to the Exchange Offer, the amount of
any such transfer taxes (whether imposed on the registered holder or any other
persons) will be payable by the tendering holder.  If satisfactory evidence of
payment of such taxes or exemption therefrom is not submitted herewith, the
amount of such transfer taxes will be billed directly to such tendering holder.

    Except as provided in this Instruction 6, it will not be necessary for
transfer tax stamps to be affixed to the Old Notes specified in this Letter.


                                         -8-

<PAGE>

7.  Waiver of Conditions.

    The Company reserves the absolute right to waive satisfaction of any or all
conditions enumerated in the Prospectus.

8.  No Conditional Tenders.

    No alternative, conditional, irregular or contingent tenders will be
accepted .  All tendering holders of Old Notes, by execution of this Letter,
shall waive any right to reserve notice of the acceptance of their Old Notes for
exchange.

    Neither the Company, the Exchange Agent nor any other person is obligated
to give notice of any defect or irregularity with respect to any tender of Old
Notes nor shall any of them incur any liability for failure to give any such
notice.

9.  Mutilated, Lost, Stolen or Destroyed Old Notes.

    Any holder whose Old Notes have been mutilated, lost, stolen or destroyed
should contact the Exchange Agent at the address indicated above for further
instructions.

10. Requests for Assistance or Additional Copies.

    Questions relating to the procedure for tendering, as well as requests for
additional copies of the Prospectus and this Letter, may be directed to the
Exchange Agent, at the address and telephone number indicated above.


                                         -9-

<PAGE>


- --------------------------------------------------------------------------------
                            SPECIAL ISSUANCE INSTRUCTIONS
                              (See Instructions 3 and 4)

    To be completed ONLY if certificates for Old Notes not
exchanged and/or New Notes are to be issued in the name of and sent
to someone other than the person or persons whose signature(s) appear(s) on this
Letter above, or if Old Notes delivered by book-entry transfer
which are not accepted for exchange are to be returned by credit to an account
maintained at the Book-Entry Transfer Facility other than the account indicated
above.

Issue:  New Notes and/or Old Notes to:

Name(s) ........................................................................
                                (Please Type or Print)

 ................................................................................
                                (Please Type or Print)

Address ........................................................................


 ................................................................................
                                      (Zip Code)
                           (Complete Substitute Form W-9)

    Credit unexchanged Old Notes delivered by book-entry
transfer to the Book-Entry Transfer Facility account set forth below.

- --------------------------------------------------------------------------------
                            (Book-Entry Transfer Facility
                            Account Number, if applicable)
- --------------------------------------------------------------------------------


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

                            SPECIAL DELIVERY INSTRUCTIONS
                              (See Instructions 3 and 4)

    To be completed ONLY if certificates for Old Notes not
exchanged and/or New Notes are to be issued in the name of and sent
to someone other than the person or persons whose signature(s) appear(s) on this
Letter above.

Mail:  New Notes and/or Old Notes to:

Name(s) ........................................................................
                                (Please Type or Print)

 ................................................................................
                                (Please Type or Print)

Address ........................................................................

 ................................................................................
                                      (Zip Code)


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


IMPORTANT:  THIS LETTER OR A FACSIMILE HEREOF (TOGETHER WITH THE CERTIFICATES
FOR OLD NOTES OR A BOOK-ENTRY CONFIRMATION AND ALL OTHER
REQUIRED DOCUMENTS OR THE NOTICE OF GUARANTEED DELIVERY) MUST BE RECEIVED BY THE
EXCHANGE AGENT PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION DATE.

                    PLEASE READ THIS ENTIRE LETTER OF TRANSMITTAL
                      CAREFULLY BEFORE COMPLETING ANY BOX ABOVE.

- --------------------------------------------------------------------------------
                                   PLEASE SIGN HERE
                      (TO BE COMPLETED BY ALL TENDERING HOLDERS)
             (Complete Accompanying Substitute Form W-9 on reverse side)

Dated: . . . . . . . . . . . . . . . .       . . . . . . . . . . . . . . , 1997
    x. . . . . . . . . . . . . . . . .       . . . . . . . . . . . . . . , 1997
    x. . . . . . . . . . . . . . . . .       . . . . . . . . . . . . . . , 1997
         Signature(s) of Owner(s)                  Date

     Area Code and Telephone Number ...........................................

    If a holder is tendering any Old Notes this Letter must be
signed by the registered holder(s) as the name(s) appear(s) on the
certificate(s) of the Old Notes by any person(s) authorized to become
registered holder(s) by endorsements and documents transmitted herewith.  If
signature is by a trustee, executor, administrator, guardian, officer or other
person acting in a fiduciary or representative capacity, please set forth full
title.  See Instruction 3.

    Name(s): ..................................................................

 ................................................................................
                                (Please Type or Print)

    Capacity: .................................................................

    Address: ..................................................................

 ................................................................................
                                 (Including Zip Code)

                                 SIGNATURE GUARANTEE
                           (if requested by Instruction 3)

    Signature's Guaranteed by an Eligible Institution .........................

 ................................................................................
                                       (Title)

 ................................................................................
                                   (Name and Firm)

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


                                        -10-
<PAGE>

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

                        SUBSTITUTE FORM W-9
                                 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

               To Be Completed by All Tendering Securityholders
                              (See Instruction 5)
 Sign this Substitute Form W-9 in Addition to the Signature(s) Required Above

                PAYOR'S NAME: THE BANK OF NEW YORK

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

        SUBSTITUTE             Part 1-Please provide your    TIN _______________
                               TIN (either your social 
                               security number or employer
         Form W-9              identification number) in the
                               box to the right and certify 
                               by signing and dating below.
Department of the Treasury     
 Internal Revenue Service      
                               Part 2-Awaiting TIN  / /
    Payor's Request for        SIGN THIS FORM and THE CERTIFICATION OF 
         Taxpayer              AWAITING TAXPAYER IDENTIFICATION NUMBER BELOW.
Identification Number (TIN)    
     and Certification         Part 3-Exempt  / /
                               See enclosed Guidelines for additional
                               information and SIGN THIS FORM.

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

CERTIFICATION -- Under penalties of perjury, I certify that:
(1)  the number shown on this form is my correct taxpayer identification number 
     (or I am waiting for a number to be issued to me); and

(2)  I am not subject to backup withholding because (i) I am exempt from backup
     withholding, or (ii) I have not been notified by the Internal Revenue 
     Service (IRS) that I am subject to backup withholding as a result of a 
     failure to report all interest or dividends, or (iii) the IRS has notified
     me that I am no longer subject to backup withholding; and

(3)  any other information provided on this form is true and correct.

CERTIFICATION INSTRUCTIONS--You must cross out item (iii) in Part (2) above 
if you have been notified by the IRS that you are subject to backup 
withholding because of underreporting interest or dividends on your tax 
return and you have not been notified by the IRS that you are no longer 
subject to backup withholding.

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

SIGNATURE ____________________________________    DATE __________________

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

        YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE
                   BOX IN PART 2 OF THE SUBSTITUTE FORM W-9

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

CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER

         I certify under penalties of perjury that a taxpayer identification 
number has not been issued to me, and either (1) I have mailed or delivered 
an application to receive a taxpayer identification number to the appropriate 
Internal Revenue Service Center or Social Security Administration Office or 
(2) I intend to mail or deliver an application in the near future.  I 
understand that if I do not provide a taxpayer identification number by the 
time of payment, 31% of all payments made to me on account of the New Notes 
shall be retained until I provide a taxpayer identification number to the 
Exchange Agent and that, if I do not provide my taxpayer identification 
number within 60 days, such retained amounts shall be remitted to the 
Internal Revenue Service as backup withholding and 31% of all reportable 
payments made to me thereafter will be withheld and remitted to the Internal 
Revenue Service until I provide a taxpayer identification number.

SIGNATURE ____________________________________    DATE __________________

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

NOTE:    FAILURE TO COMPLETE AND RETURN THIS SUBSTITUTE FORM W-9 MAY RESULT IN 
         BACKUP WITHHOLDING OF 31% OF ANY PAYMENTS MADE TO YOU.  PLEASE REVIEW 
         THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
         NUMBER FOR ADDITIONAL INFORMATION.

<PAGE>

           GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9

A.       TIN - The Taxpayer Identification Number for most individuals is your 
         social security number.  Refer to the following chart to determine the
         appropriate number:
- --------------------------------------------------------------------------------

                                         Give the
                                          SOCIAL
    For this type of                     SECURITY
          account                        Number of
  ---------------------          -----------------------------
1. Individual                    The individual

2. Two or more                   The actual owner of the
   individuals (joint            account or, if combined
   account)                      funds, the first individual
                                 on the account(1)

3. Custodian account             The minor(2)
   of a minor (Uniform
   Gift to Minors Act)

4. a. The usual                  The grantor-trustee(1)
      revocable
      savings trust
      (grantor is also
      trustee)

   b. So-called trust            The actual owner(1)
      account that is
      not a legal or
      valid trust under
      state law

5. Sole proprietorship           The owner(3)


                                         Give the
                                         EMPLOYER
    For this type of                  IDENTIFICATION
          account                        Number of
  ---------------------          -----------------------------

6. Sole proprietorship           The owner(3)

7. A valid trust,                Legal entity(4)
   estate or pension
   trust

8. Corporate                     The corporation

9. Association, club,            The organization
   religious,
   charitable,
   educational or
   other tax-exempt
   organization

10.Partnership                   The partnership

11.A broker or                   The broker or nominee
   registered nominee

12.Account with the              The public entity
   Department of 
   Agriculture

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

(1)   List first and circle the name of the person whose number you furnish.
(2)   Circle the minor's name and furnish the minor's name and social security
      number.
(3)   Show the individual's name.  You may also enter your business name or 
      "doing business as" name.  You may use either your Social Security number
      or your employer identification number.
(4)   List first and circle the name of the legal trust, estate, or pension 
      trust.

NOTE: If no name is circled when there is more than one name, the number will be
      considered to be that of the first name listed.

B.    Exempt Payees -- The following lists exempt payees. If you are exempt, you
      must nonetheless complete the form and provide your TIN in order to 
      establish that you are exempt.  Check the box in Part 3 of the form, sign
      and date the form.

      For this purpose, Exempt Payees include:  (1) a corporation;  (2)  an 
      organization exempt from tax under section 501(a), or an individual 
      retirement plan (IRA) or a custodial account under section 403(b)(7);
      (3)  the United States or any of its agencies or instrumentalities;  (4)
      a state, the District of Columbia, a possession of the United States, or
      any of their political subdivisions or instrumentalities;  (5)  a foreign
      government or any of its political subdivisions, agencies or 
      instrumentalities;  (6)  an international organization or any of its 
      agencies or instrumentalities;  (7)  a foreign central bank of issue;  (8)
      a dealer in securities or commodities required to register in the U.S.
      or a possession of the U.S.;  (9) a real estate investment trust;   (10)
      an entity registered at all times during the tax year under the Investment
      Company Act of 1940;  (11)  a common trust fund operated by a bank under
      section 584(a);  (12)  a financial institution. 

C.    OBTAINING A NUMBER

      If you do not have a taxpayer identification number or you do not know 
      your number, obtain Form SS-5, application for a Social Security Number, 
      or Form SS-4, Application for Employer Identification Number, at the local
      office of the Social Security Administration or the Internal Revenue
      Service and apply for a number.

D.    PRIVACY ACT NOTICE

      Section 6109 requires most recipients of dividend, interest or other 
      payments to give taxpayer identification numbers to payors who must 
      report the payments to IRS.  IRS uses the numbers for identification 
      purposes.  Payors must be given the numbers whether or not recipients 
      are required to file tax returns.  Payors must generally withhold 31% of
      taxable-interest, dividend, and certain other payments to a payee who does
      not furnish a taxpayer identification number.  Certain penalties may 
      also apply.

E.    PENALTIES

      (1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER.  If you
      fail to furnish your taxpayer identification number to a payor, you are 
      subject to a penalty of $50 for each such failure unless your failure is 
      due to reasonable cause and not to willful neglect.

      (2) FAILURE TO REPORT CERTAIN DIVIDEND AND INTEREST PAYMENTS.  If you fail
      to include any portion of an includible payment for interest, dividends, 
      or patronage dividends in gross income, such failure will be treated as 
      being due to negligence and will be subject to a penalty of 5% on any 
      portion of an under-payment attributable to that failure unless there is
      clear and convincing evidence to the contrary.

      (3) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING.  If 
      you make a false statement with no reasonable basis which results in no 
      imposition of backup withholding, you are subject to a penalty of $500.

      (4) CRIMINAL PENALTY FOR FALSIFYING INFORMATION.  Falsifying 
      certifications or affirmations may subject you to criminal penalties
      including fines and/or imprisonment.


      FOR ADDITIONAL INFORMATION CONTACT YOUR TAX CONSULTANT OR THE INTERNAL
      REVENUE SERVICE.


<PAGE>


                                                                 Exhibit 99.2




                        NOTICE OF GUARANTEED DELIVERY FOR

                            CellNet Data Systems, Inc.                       


         This form or one substantially equivalent hereof must be used to 
accept the Exchange Offer (as defined below) of CellNet Data Systems, Inc. 
(the "Company") made pursuant to the Prospectus, dated [___________________]
(the "Prospectus"), and the related Letter of Transmittal (the "Letter of 
Transmittal" and, together with the Prospectus, the "Exchange Offer") if 
certificates for Old Notes (as defined below) are not immediately available 
or if the procedure for book-entry transfer cannot be completed on a timely 
basis or time will not permit all required documents to reach the Company 
prior to 5:00 P.M., New York City time, on the Expiration Date of the 
Exchange Offer.  Such form may be delivered or transmitted by facsimile 
transmission, mail or hand delivery to The Bank of New York (the "Exchange 
Agent") as set forth below.  In addition, in order to utilize the guaranteed 
delivery procedure to tender Old Notes pursuant to the Exchange Offer, a 
completed, signed and dated Letter of Transmittal relating to the Notes (or 
facsimile thereof) must also be received by the Exchange Agent prior to 5:00 
P.M., New York City time, on the Expiration Date.  The term "Old Notes" 
shall mean the Company's outstanding 13% Senior Discount Notes, due 
2005, Series A.  Capitalized terms not defined herein are defined in the 
Prospectus.

<TABLE>
<CAPTION>

                                             THE BANK OF NEW YORK

- -------------------------------------------------------------------------------------------------------------
 BY REGISTERED OR CERTIFIED MAIL:       FACSIMILE TRANSMISSION NUMBER:          BY HAND/OVERNIGHT DELIVERY:
- -------------------------------------------------------------------------------------------------------------

<S>                                  <C>                                      <C>
                                                (212) 571-3080


      101 Barclay Street-7E          (For Eligible Institutions Only)              101 Barclay Street

        New York, New York                   Confirm by Telephone:            Corporate Trust Services Window

  Attn:   Reorganization Section                (212) 815-6333                          Ground Level

          Arwen Gibbons                                                          New York, New York  10286

                                                                               Attn:  Reorganization Section




                                             For Information Call:

                                                (212) 815-6333
- -------------------------------------------------------------------------------------------------------------
</TABLE>


         DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH
ABOVE, OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE OTHER THAN AS SET FORTH
ABOVE, WILL NOT CONSTITUTE A VALID DELIVERY.


<PAGE>


Ladies and Gentlemen:

         Upon the terms and conditions set forth in the Prospectus and the
accompanying Letter of Transmittal, the undersigned hereby tenders to the
Company the principal amount at maturity of Old Notes set forth below, pursuant
to the guaranteed delivery procedure described in "The Exchange
Offer--Guaranteed Delivery Procedures" section of the Prospectus.


                                       -2-

<PAGE>


- ------------------------------------------------------------------------------
Principal Amount At Maturity of Old Notes
Tendered:(1)




$________________________________________




Certificate Nos. (if available):


_________________________________________  If Old Notes will be delivered by
                                           book-entry transfer to The Depository
                                           Trust Company, provide account
                                           number.


Total Principal Amount at Maturity
Represented by Old Notes Certificate(s):


$_______________________________________   Account Number_______________________
- -------------------------------------------------------------------------------


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

     (1)Must be in denominations of principal amount at maturity of $1,000 and
any integral multiple thereof.

                                       -3-

<PAGE>


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

         All authority herein conferred or agreed to be conferred shall survive
the death or incapacity of the undersigned and every obligation of the
undersigned hereunder shall be binding upon the heirs, personal representatives,
successors and assigns of the undersigned.

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




                                PLEASE SIGN HERE

X_______________________________        ______________________________

X_______________________________        ______________________________
    Signature(s) of Owner(s) or                        Date
    Authorized Signatory

Area Code and Telephone Number:         ______________________________

         Must be signed by the holder(s) of the Old Notes as their name(s)
appear(s) on certificates for Old Notes or on a security position listing, or by
person(s) authorized to become registered holder(s) by endorsement and documents
transmitted with this Notice of Guaranteed Delivery.  If signature is by a
trustee, executor, administrator, guardian, attorney-in-fact, officer or other
person acting in a fiduciary or representative capacity, such person must set
forth his or her full title below.


                      Please print name(s) and address(es)


Name(s):       ________________________________________________________________
               ________________________________________________________________
               ________________________________________________________________
Capacity:      ________________________________________________________________
Address(es):   ________________________________________________________________
               ________________________________________________________________
               ________________________________________________________________

                                    GUARANTEE

         The undersigned, an Eligible Institution within the meaning of Rule 
17(A)(d)-15 under the Securities Exchange Act of 1934, as amended, hereby 
guarantees that the certificates representing the principal amount at 
maturity of Old Notes tendered hereby in proper form for transfer, or timely 
confirmation of the book-entry transfer of such Old Notes into the Exchange 
Agent's account at The Depository Trust Company pursuant to the procedures 
set forth in "The Exchange Offer--Guaranteed Delivery Procedures" 
section of the Prospectus, together with a properly completed and duly 
executed Letter of Transmittal (or a manually signed facsimile thereof) 
with any required signature guarantee and any other documents required 
by the Letter of Transmittal, will be received by the

                                       -4-

<PAGE>

Exchange Agent at the address set forth above, no later than five New York Stock
Exchange trading days after the date of execution hereof.


__________________________________      ___________________________________
          Name of Firm                         Authorized Signature

__________________________________      ___________________________________
            Address                                    Title

__________________________________      ___________________________________
           Zip Code                           (Please Type or Print)

Area Code and Telephone No._______      Dated:_____________________________



NOTE: DO NOT SENT CERTIFICATES FOR OLD NOTES WITH THIS FORM.  CERTIFICATES FOR
OLD NOTES SHOULD ONLY BE SENT WITH YOUR LETTER OF TRANSMITTAL.


                                       -5-



<PAGE>

                                                           _______________, 1996

                                   EXCHANGE AGENT AGREEMENT

The Bank of New York
Corporate Trust Trustee Administration
101 Barclay Street, 21st Floor
New York, New York 10286

Ladies and Gentlemen:

     CellNet Data Systems, Inc. (the "Company") proposes to make an offer (the 
"Exchange Offer") to exchange its 13% Senior Discount Notes due June 15, 2005, 
Series A (the "Old Securities") for its 13% Senior Discount Notes due June 15, 
2005, Series B (the "New Securities"). The terms and conditions of the Exchange
Offer as currently contemplated are set forth in a prospectus, dated 
__________, 1996 (the "Prospectus"), proposed to be distributed to all record 
holders of the Old Securities.The Old Securities and the New Securities are 
collectively referred to herein as the "Securities".

     The Company hereby appoints The Bank of New York to act as exchange agent 
(the "Exchange Agent") in connection with the Exchange Offer. References 
hereinafter to "you" shall refer to The Bank of New York.

     The Exchange Offer is expected to be commenced by the Company on or about 
__________, 199___. The Letter of Transmittal accompanying the Prospectus (or 
in the case of book entry securities, the ATOP system) is to be used by the 
holders of the Old Securities to accept the Exchange Offer and contains 
instructions with respect to the delivery of certificates for Old Securities 
tendered in connection therewith.

     The Exchange Offer shall expire at 5:00 P.M., New York City time, on 
_______________, 199___ or on such later date or time to which the Company 
may extend the Exchange Offer (the "Expiration Date"). Subject to the terms and 
conditions set forth in the Prospectus, the Company expressly reserves the 
right to extend the Exchange Offer from time to time and may extend the 
Exchange Offer by giving oral (confirmed in writing) or written notice to you 
before 9:00 A.M., New York City time, on the business day following the 
previously scheduled Expiration Date.

     The Company expressly reserves the right to amend or terminate the Exchange
Offer, andnot to accept for exchange any old Securities not theretofore 
accepted for exchange, upon the occurrence of any of the conditions of the 
Exchange Offer specified in the Prospectus under the caption "The Exchange 
Offer -- Conditions." The Company will give oral (confirmed in writing) or 
written notice of any amendment, termination or nonacceptance to you as 
promptly as practicable.

<PAGE>

     In carrying out your duties as Exchange Agent, you are to act in 
accordance with the following instructions:

     1.     You will perform such duties and only such duties as are 
specifically set forth in the section of the Prospectus captioned "The 
Exchange Offer," or as specifically set forth herein; PROVIDED, HOWEVER, that
in no way will your general duty to act in good faith be discharged by the 
foregoing.

     2.     You will establish an account with respect to the Old Securities 
at The Depository Trust Company (the "Book-Entry Transfer Facility") for 
purposes of the Exchange Offer within two business days after the date of the 
Prospectus, and any financial institution that is a participant in the 
Book-Entry Transfer Facility's systems may make book-entry delivery of 
the Old Securities by causing the Book-Entry Transfer Facility to transfer 
such Old Securities into your account in accordance with the Book-Entry 
Transfer Facility's procedure for such transfer.

     3.     You are to examine each of the Letters of Transmittal and 
certificates for Old Securities (or confirmation of book-entry transfer 
into your account at the Book-Entry Transfer Facility) and any other 
documents delivered or mailed to you by or for holders of the Old Securities 
to ascertain whether: (i) the Letters of Transmittal and any such other 
documents are duly executed and properly completed in accordance with 
instructions set forth therein and (ii) the Old Securities have otherwise 
been properly tendered.In each case where the Letter of Transmittal or any 
other document has been improperly completed or executed or any of the
certificates for Old Securities are not in proper form for transfer or some
other irregularity in connection with the acceptance of the Exchange Offer
exists, you will endeavor to inform the presenters of the need for 
fulfillment of all requirements and to take any other action as may be 
necessary or advisable to cause such irregularity to be corrected.

     4.     With the approval of the President, Senior Vice President, 
Executive Vice President, or any Vice President of the Company (such 
approval, if given orally, to be confirmed in writing) or any other party 
designated by such an officer in writing, you are authorized to waive any 
irregularities in connection with any tender of Old Securities pursuant to 
the Exchange Offer.

     5.     Tenders of Old Securities may be made only as set forth in the 
Letter of Transmittal and in the section of the Prospectus captioned "The 
Exchange Offer -- Procedures for Tendering", and Old Securities shall be 
considered properly tendered to you only when tendered in accordance with the 
procedures set forth therein.

     Notwithstanding the provisions of this paragraph 5, Old Securities which 
the President, Senior Vice President, Executive Vice President, or any Vice 
President of the Company shall approve as having been properly tendered shall 
be considered to be properly tendered (such approval, if given orally, shall 
be confirmed in writing).

     6.     You shall advise the Company with respect to any Old Securities 
received subsequent to the Expiration Date and accept its instructions with 
respect to disposition of such Old Securities.

                                      -2-
<PAGE>

     7.     You shall accept tenders:

            (a)  in cases where the Old Securities are registered in two or 
more names only if signed by all named holders;

            (b)  in cases where the signing person (as indicated on the 
Letter of Transmittal) is acting in a fiduciary or a representative capacity 
only when proper evidence of his or her authority so to act is submitted; and

            (c)  from persons other than the registered holder of Old 
Securities provided that customary transfer requirements, including any 
applicable transfer taxes, are fulfilled.

     You shall accept partial tenders of Old Securities where so indicated 
and as permitted in the Letter of Transmittal and deliver certificates for 
Old Securities to the transfer agent for split-up and return any 
untendered Old Securities to the holder (or such other person as may be 
designated in the Letter of Transmittal) as promptly as practicable after 
expiration or termination of the Exchange Offer.

     8.     Upon satisfaction or waiver of all of the conditions to the 
Exchange Offer, the Company will notify you (such notice if given orally, to 
be confirmed in writing) of its acceptance, promptly after the Expiration 
Date, of all Old Securities properly tendered and you, on behalf of the 
Company, will exchange such Old Securities for New Securities and cause such 
Old Securities to be canceled. Delivery of New Securities will be made on 
behalf of the Company by you at the rate of $1,000 principal amount of New 
Securities for each $1,000 principal amount of the corresponding series of 
Old Securities tendered promptly after notice (such notice if given orally, 
to be confirmed in writing) of acceptance of said Old Securities by the 
Company; PROVIDED, HOWEVER, that in all cases, Old Securities tendered 
pursuant to the Exchange Offer will be exchanged only after timely receipt by 
you of certificates for such Old Securities (or confirmation of book-entry 
transfer into your account at the Book-Entry Transfer Facility), a 
properly completed and duly executed Letter of Transmittal (or facsimile 
thereof) with any required signature guarantees and any other required 
documents. You shall issue New Securities only in denominations of $1,000 or 
any integral multiple thereof.

     9.     Tenders pursuant to the Exchange Offer are irrevocable, except 
that, subject to the terms and upon the conditions set forth in the 
Prospectus and the Letter of Transmittal, Old Securities tendered pursuant to 
the Exchange Offer may be withdrawn at any time prior to the Expiration Date.

    10.     The Company shall not be required to exchange any Old Securities 
tendered if any of the conditions set forth in the Exchange Offer are not 
met. Notice of any decision by the Company not to exchange any Old Securities 
tendered shall be given (and confirmed in writing) by the Company to you.

    11.     If, pursuant to the Exchange Offer, the Company does not accept 
for exchange all or part of the Old Securities tendered because of an invalid 
tender, the occurrence of certain other events set forth in the Prospectus 
under the caption "The Exchange Offer -- Conditions" or otherwise, you 

                                      -3-

<PAGE>

shall as soon as practicable after the expiration or termination of the 
Exchange Offer return those certificates for unaccepted Old Securities (or 
effect appropriate book-entry transfer), together with any related required 
documents and the Letters of Transmittalrelating thereto that are in your 
possession, to the persons who deposited them.

    12.     All certificates for reissued Old Securities, unaccepted Old 
Securities or for New Securities shall be forwarded by (a) first-class 
certified mail, return receipt requested under a blanket surety bond 
protecting you and the Company from loss or liability arising out of the 
non-receipt or non-delivery of such certificates or (b) by registered 
mail insured separately for the replacement value of each of such 
certificates.

    13.     You are not authorized to pay or offer to pay any concessions, 
commissions or solicitation fees to any broker, dealer, bank or other person 
or to engage or utilize any person to solicit tenders.

    14.     As Exchange Agent hereunder you:

            (a)  shall have no duties or obligations other than those 
specifically set forth herein or as may be subsequently agreed in writing by 
you and the Company;

            (b)  will be regarded as making no representations and having no 
responsibilities as to the validity, sufficiency, value or genuineness of any 
of the certificates or the Old Securities represented thereby deposited with 
you pursuant to the Exchange Offer, and will not be required to and will make 
no representation as to the validity, value or genuineness of the Exchange 
Offer;

            (c)  shall not be obligated to take any legal action hereunder 
which might in your reasonable judgment involve any expense or liability, 
unless you shall have been furnished with reasonable indemnity;

            (d)  may reasonably rely on and shall be protected in acting in 
reliance upon any certificate, instrument, opinion, notice, letter, telegram 
or other document or security delivered to you and reasonably believed by you 
to be genuine and to have been signed by the proper party or parties;

            (e)  may reasonably act upon any tender, statement, request, 
comment, agreement or other instrument whatsoever not only as to its due 
execution and validity and effectiveness of its provisions, but also as to 
the truth and accuracy of any information contained therein, which you shall 
in good faith believe to be genuine or to have been signed or represented by 
a proper person or persons;

            (f)  may rely on and shall be protected in acting upon written or 
oral instructions from any officer of the Company;

            (g)  may consult with your counsel with respect to any questions 
relating to your duties and responsibilities and the advice or opinion of 
such counsel shall be full and complete 

                                      -4-
<PAGE>

authorization and protection in respect of any action taken, suffered or 
omitted to be taken by you hereunder in good faith and in accordance with the 
advice or opinion of such counsel; and

            (h)  shall not advise any person tendering Old Securities 
pursuant to the Exchange Offer as to the wisdom of making such tender or as 
to the market value or decline or appreciation in market, value of any Old 
Securities.

    15.     You shall take such action as may from time to time be requested 
by the Company or its counsel (and such other action as you may reasonably 
deem appropriate) to furnish copies of the Prospectus, Letter of Transmittal 
and the Notice of Guaranteed Delivery (as defined in the Prospectus) or such 
other forms as may be approved from time to time by the Company, to all 
persons requesting such documents and to accept and comply with telephone 
requests for information relating to the Exchange Offer, provided that such 
information shall relate only to the procedures for accepting (or withdrawing 
from) the Exchange Offer. The Company will furnish you with copies of such 
documents at your request. All other requests for information relating to the 
Exchange Offer shall be directed to the Company, Attention: [CHIEF FINANCIAL
OFFICER].

    16.     You shall advise by facsimile transmission or telephone, and 
promptly thereafter confirm in writing to the [CHIEF FINANCIAL OFFICER] of 
the Company and such other person or persons as it may request, daily (and 
more frequently during the week immediately preceding the Expiration Date and 
if otherwise requested) up to and including the Expiration Date, as to the 
number of Old Securities which have been tendered pursuant to the Exchange 
Offer and the items received by you pursuant to this Agreement, separately 
reporting and giving cumulative totals as to items properly received and 
items improperly received. In addition, you will also inform, and cooperate in
making available to, the Company or any such other person or persons, upon 
oral request made from time to time prior to the Expiration Date, such other 
information as it or he or she reasonably requests. Such cooperation shall 
include, without limitation, the grant by you to the Company, and such 
persons as the Company may request, of access to those persons on your staff 
who are responsible for receiving tenders, in order to ensure that 
immediately prior to the Expiration Date the Company shall have received 
information in sufficient detail to enable it to decide whether to extend the 
Exchange Offer. You shall prepare a final list of all persons whose tenders 
were accepted, the aggregate principal amount of Old Securities tendered, the 
aggregate principal amount of Old Securities accepted and deliver said list 
to the Company.

    17.     Letters of Transmittal and Notices of Guaranteed Delivery shall 
be stamped by you as to the date and the time of receipt thereof and shall be 
preserved by you for a period of time at least equal to the period of time 
you preserve other records pertaining to the transfer of securities.You shall 
dispose of unused Letters of Transmittal and other surplus materials by 
returning them to the Company.

    18.     You hereby expressly waive any lien, encumbrance or right of 
set-off whatsoever that you may have with respect to funds deposited with 
you for the payment of transfer taxes by reason of amounts, if any, borrowed 
by the Company, or any of its subsidiaries or affiliates pursuant to any loan 
or credit agreement with you or for compensation owed to you hereunder.

                                      -5-

<PAGE>

    19.     For services rendered as Exchange Agent hereunder, you shall be 
entitled to such compensation as set forth on Schedule I attached hereto.

    20.     You hereby acknowledge receipt of the Prospectus and the Letter 
of Transmittal and further acknowledge that you have examined each of 
them. Any inconsistency between this Agreement, on the one hand, and the 
Prospectus and the Letter of Transmittal (as they may be amended from time to 
time), on the other hand, shall be resolved in favor of the latter two 
documents, except with respect to the duties, liabilities and indemnification 
of you as Exchange Agent, which shall be controlled by this Agreement.

    21.     The Company covenants and agrees to indemnify and hold you 
harmless in your capacity as Exchange Agent hereunder against any loss, 
liability, cost or expense, including reasonable attorneys' fees and 
expenses, arising out of or in connection with any act, omission, delay or 
refusal made by you in reliance upon any signature, endorsement, assignment, 
certificate, order, request, notice, instruction or other instrument or 
document reasonably believed by you to be valid, genuine and sufficient and 
in accepting any tender or effecting any transfer of Old Securities 
reasonably believed by you in good faith to be authorized, and in delaying or 
refusing in good faith to accept any tenders or effect any transfer of Old 
Securities; PROVIDED, HOWEVER, that the Company shall not be liable for 
indemnification or otherwise for any loss, liability, cost or expense to the 
extent arising out of your gross negligence or willful misconduct.In no case 
shall the Company be liable under this indemnity with respect to any claim 
against you unless the Company shall be notified by you, by letter or by 
facsimile confirmed by letter, of the written assertion of a claim against 
you or of any other action commenced against you, promptly after you shall 
have received any such written assertion or notice of commencement of 
action. The Company shall be entitled to participate at its own expense in the 
defense of any such claim or other action, and, if the Company so elects, the 
Company shall assume the defense of any suit brought to enforce any such 
claim. In the event that the Company shall assume the defense of any such 
suit, the Company shall not be liable for the fees and expenses of any 
additional counsel thereafter retained by you so long as the Company shall 
retain counsel satisfactory to you to defend such suit.

    22.     You shall arrange to comply with all requirements under the tax 
laws of the United States, including those relating to missing Tax 
Identification Numbers, and shall file any appropriate reports with the 
Internal Revenue Service. The Company understands that you are required to 
deduct 31% on payments to holders who have not supplied their correct 
Taxpayer Identification Number or required certification. Such funds will be 
turned over to the Internal Revenue Service in accordance with applicable 
regulations.

    23.     You shall deliver or cause to be delivered, in a timely manner to 
each governmental authority to which any transfer taxes are payable in 
respect of the exchange of Old Securities, your check in the amount of all 
transfer taxes so payable, and the Company shall reimburse you for the amount 
of any and all transfer taxes payable in respect of the exchange of Old 
Securities; PROVIDED, HOWEVER, that you shall reimburse the Company for 
amounts refunded to you in respect of your payment of any such transfer 
taxes, at such time as such refund is received by you.

                                      -6-
<PAGE>

    24.     This Agreement and your appointment as Exchange Agent hereunder 
shall be construed and enforced in accordance with the laws of the State of 
New York applicable to agreements made and to be performed entirely within 
such state, and without regard to conflicts of law principles, and shall 
inure to the benefit of, and the obligations created hereby shall be binding 
upon, the successors and assigns of each of the parties hereto.

    25.     This Agreement may be executed in two or more counterparts, each 
of which shall be deemed to be an original and all of which taken together 
shall constitute one and the same agreement.

    26.     In case any provision of this Agreement shall be invalid, illegal 
or unenforceable, the validity, legality and enforceability of the remaining 
provisions shall not in any way be affected or impaired thereby.

    27.     This Agreement shall not be deemed or construed to be modified, 
amended, rescinded, cancelled or waived, in whole or in part, except by a 
written instrument signed by a duly authorized representative of the party to 
be charged. This Agreement may not be modified orally.

    28.     Unless otherwise provided herein, all notices, requests and other 
communications to any party hereunder shall be in writing (including 
facsimile or similar writing) and shall be given to such party, addressed to 
it, at its address or telecopy number set forth below:

            If to the Company:

                    CellNet Data Systems, Inc.
                    125 Shoreway Road
                    San Carlos, California 94070

                    Facsimile:(415) 592-6858
                    Attention: Chief Financial Officer

            If to the Exchange Agent:

                    The Bank of New York
                    101 Barclay Street
                    Floor 21 West
                    New York, New York 10286

                    Facsimile:(212) 815-5915
                    Attention: Corporate Trust Trustee Administration

    29.     Unless terminated earlier by the parties hereto, this Agreement 
shall terminate 90 days following the Expiration Date. Notwithstanding the 
foregoing, Paragraphs 19, 21 and 23 shall survive the termination of this 
Agreement. Upon any termination of this Agreement, you shall 

                                      -7-
<PAGE>

promptly deliver to the Company any certificates for Securities, funds or 
property then held by you as Exchange Agent under this Agreement.

    30.     This Agreement shall be binding and effective as of the date 
hereof.






                [Remainder of page intentionally left blank.]







                                      -8-
<PAGE>

     Please acknowledge receipt of this Agreement and confirm the 
arrangements herein provided by signing and returning the enclosed copy.

                                        CELLNET DATA SYSTEMS, INC.

                                        By:
                                           -------------------------------------
                                               Name:
                                               Title:

Accepted as the date
first above written:

THE BANK OF NEW YORK,
as Exchange Agent

By:
   -------------------------------
       Name:
       Title:

<PAGE>

                                        SCHEDULE I

                                           FEES


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