AMERICAN PORTABLE TELECOM INC
8-K, 1996-12-18
RADIOTELEPHONE COMMUNICATIONS
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                                    FORM 8-K

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       The Securities Exchange Act of 1934

         Date of Report (Date of earliest event reported): June 19, 1996


                           Aerial Communications, Inc.
             (Exact name of registrant as specified in its charter)


   Delaware                        0-28262                  39-1706857
(State or other                  (Commission               (IRS Employer
jurisdiction of                   File Number             Identification No.)
 incorporation)

                                    



   8410 West Bryn Mawr, Suite 1100, Chicago, Illinois               60631
- --------------------------------------------------------           -------
         (Address of principal executive offices)                (Zip Code)

Registrant's telephone number, including area code:  (773) 399-4200


                                 Not Applicable
          (Former name or former address, if changed since last report)








<PAGE>




Item 5.   Other Events.

         This  Current  Report  on Form 8-K is being  filed for the  purpose  of
filing the Nokia Credit  Agreement  dated June 19, 1996 and rider  thereto dated
October 30, 1996 between the Company and Nokia Telecommunications Inc.


Item 7.           Financial Statements and Exhibits

(c)      Exhibits

         The exhibits  accompanying  this report are listed in the accompanying
Exhibit Index.




                                        2

<PAGE>



                                   SIGNATURES


         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned, thereto duly authorized.


Date:    December 18, 1996       AERIAL COMMUNICATIONS, INC.
                                 (Registrant)





                                  By: /s/ J. Clarke  Smith
                                  --------------------------------------------
                                  J. Clarke Smith
                                  Vice President - Finance and Administration,
                                  Chief Financial Officer and Treasurer












                                        3

<PAGE>



                                  EXHIBIT INDEX


Exhibit Number                Description of Exhibit
- --------------                ----------------------
     99.1                     The Credit Agreement dated June 19, 1996 and rider
                              thereto dated October 30, 1996 between the Company
                              and Nokia Telecommunications, Inc.


                                        4

<PAGE>




                                                               Exhibit 99.1

CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.   
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.

                                                               EXECUTION COPY








                                CREDIT AGREEMENT


                            Dated as of June 19, 1996

                                     between


                         AMERICAN PORTABLE TELECOM, INC.


                                       and

                          NOKIA TELECOMMUNICATIONS INC.




                                       

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.    
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



                                CREDIT AGREEMENT

         This Credit  Agreement,  dated as of June 19, 1996, is between American
Portable   Telecom,   Inc.,   a   Delaware   corporation   ("APT"),   and  Nokia
Telecommunications Inc., a Delaware corporation ("Nokia").

                                 R E C I T A L S

         WHEREAS,  APT has agreed,  pursuant to that certain PCS  Infrastructure
Supply Contract dated March 1, 1996 between APT and Nokia, to purchase equipment
and  services  from  Nokia,  and Nokia has agreed to  finance,  pursuant to this
Agreement, * * * of the purchase price of such equipment and services;

         NOW,  THEREFORE,  IN CONSIDERATION OF the undertakings set forth herein
and other good and valuable consideration,  the receipt and sufficiency of which
is hereby acknowledged, the parties hereto agree as follows:


                                    ARTICLE I

                                   DEFINITIONS

         1.1.  Certain Defined Terms.  As used in this Agreement, the following 
terms shall have the following meanings (such meanings to be equally applicable
to both the singular and plural forms of the terms defined):

         "Acceleration   Election"  means  an  election  by  APT,  in  its  sole
discretion,  by written  notice  delivered by APT to Nokia on or before * * * to
both (a) purchase an additional * * * worth of equipment and services from Nokia
pursuant to Paragraph  2.2 of the Purchase  Agreement and (b) sell the Rule 144A
Notes with respect to Tranche B between * * * in an aggregate  principal  amount
determined  pursuant  to clause  (e) of the  definition  of Rule 144A Notes with
respect to Tranche B.

         "Adjusted  Spread"  means,  with  respect  to the Rule 144A  Notes with
respect  to  Tranche B and the Rule 144A  Notes  with  respect to Tranche C (the
"Applicable Rule 144A Notes"), a number of basis points equal to:
                  (a) the  number  of basis  points  agreed  to by APT and Nokia
         after  consultation  with the Designated  Placement Agent as the spread
         applicable  to the Rule 144A  Sale of the  Applicable  Rule 144A  Notes
         contemplated by this Agreement as of the time at which the price of the
         Applicable Rule 144A Notes is determined (or, if


                                        1

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.        
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         the Applicable Rule 144A Notes are Rule 144A Notes with respect to 
         Tranche B ***
                                     *      *     *               or, if the
         Applicable Rule 144A Notes are Rule 144A Notes with respect to Tranche 
         C *  *  *
                                     *      *     *               minus
                                                                  -----
                  (b) the difference (whether positive or negative) of (i) the *
         * * as of the time at which the price of the Applicable Rule 144A Notes
         is  determined  (or,  if the  Applicable  Rule 144A Notes are Rule 144A
         Notes with respect to Tranche B and
                                     *      *     *               or, if the
         Applicable Rule 144A Notes are Rule 144A Notes with respect to Tranche 
         C and the
                                     *      *     *               minus (ii) the
         ***                                   *      *     *
provided, however, that if such sum for the Applicable Rule 144A Notes is * * *
                                     *      *     *
                                     *      *     *               and
provided, further, that if APT and Nokia, after consultation with the Designated
Placement Agent,  cannot agree on the spread contemplated by (a) above, then the
"Adjusted Spread" for the Applicable Rule 144A Notes shall equal ***.

         "Affiliate" means, as to any Person, any other Person that, directly or
indirectly,  controls,  is  controlled  by or is under common  control with such
Person  or is a  director  or  officer  of such  Person.  For  purposes  of this
definition,  the term "control" (including the terms "controlling,"  "controlled
by" and "under common control with") of a Person means the possession, direct or
indirect, of the power to vote 10% or more of the Voting Stock of such Person or
to direct or cause the direction of the  management and policies of such Person,
whether through the ownership of Voting Stock, by contract or otherwise.

         "Agreement"  means  this  Credit  Agreement,  as it may be  amended  or
modified and in effect from time to time.

         "APT" has the meaning specified in the recital of parties to this 
Agreement.

         "APT  Indenture"  means that  certain  indenture  among APT,  TDS and a
trustee  pursuant  to which APT expects to issue,  and TDS will  unconditionally
guarantee APT's  obligations  with respect to, Rule 144A Notes, on substantially
the  same  terms  as  the  TDS  Guaranty,   which  indenture  shall  have  terms
substantially  similar to the TDS Indenture (modified to reflect the zero coupon
nature  of  the  Rule  144A  Notes),   the   covenants  and  events  of  default
substantially as set forth in Exhibit B hereto,  covenants substantially similar
to those set forth in sections 3.1 through 3.5, inclusive,  of the TDS Indenture
(modified  to reflect  the zero  coupon  nature of the Rule 144A Notes) and such
other terms,  covenants and events of default as shall be appropriate  from time
to time pursuant to Section 2.9, as such indenture shall be amended or otherwise
supplemented from time to time.


                                        2

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.


         "Article" means an article of this Agreement,  unless another  document
is specifically referenced.

         "Business  Day" means a day of the year on which banks are not required
or authorized to close in New York, New York or Chicago, Illinois.

         "Capital  Stock"  means and  includes  any and all  shares,  interests,
participations  or other  equivalents  (however  designated)  of  ownership in a
corporation or other Person.

         "Capitalization"  means with respect to a Person the total of (a) Debt,
(b) the par value or, in the case of Capital  Stock  with no par value,  a value
stated on the books, of all outstanding shares of Capital Stock, (c) the paid-in
surplus and retained earnings (or minus the net surplus deficit, as the case may
be), (d) deferred  taxes and deferred  investment tax credits,  (e)  Capitalized
Rent and (f) minority interests in Subsidiaries, of such Person.

         "Capitalized Rent" means the present value (discounted semi-annually at
a discount  rate equal to the  weighted  average  rate of interest  borne by the
securities  issued  under the TDS  Indenture)  of the  total net  amount of rent
payable for the remaining  term of any lease of property by TDS  (including  any
period for which such lease has been extended);  provided, however, that no such
rental  obligation  shall be  deemed to be  Capitalized  Rent  unless  the lease
resulted  from a Sale and  Leaseback  Transaction.  The total net amount of rent
payable  under any lease for any  period  shall be the total  amount of the rent
payable by the lessee with respect to such period but shall not include  amounts
required to be paid on account of  maintenance  and repairs,  insurance,  taxes,
assessments, water rates, sewer rates and similar charges.

         "CERCLA" means the Comprehensive  Environmental Response,  Compensation
and Liability Act of 1980, as amended from time to time.

         "Closing  Date" means the date upon which  Nokia and APT  execute  this
Agreement.

         "Commitment" means the obligation of Nokia to extend credit, to finance
* * * of the  purchase  price of  equipment  and services to be purchased by APT
under the  Purchase  Agreement  on the terms  and  conditions  set forth in this
Agreement,  in the  principal  amount of up to * * * during the period  from the
date hereof until * * * plus, if APT makes an Acceleration Election or elects on
or before * * * pursuant to Paragraph 2.2 of the Purchase  Agreement to purchase
* * *
                                            *      *     *
                                            *      *     *

         "Communications Act" means the Federal Communications Act of 1934, 
as amended.



                                        3

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         "Communications  Related  Business"  means any PCS System and any other
business of developing,  owning,  operating,  managing or  maintaining  wireless
communications businesses.

         "Confidential  Matters"  means all  information  about the business and
financial matters of APT or Nokia including, without limitation, costs, profits,
radio  coverage  plans,  cell  site  locations,  plans for  future  development,
training materials, documentation, methods of operation, marketing concepts, the
terms  and  conditions  of  the  Loan  Documents,   and  any  other  proprietary
information  relating to a party hereto or its Affiliates  and their  respective
operations,  businesses,  and financial  affairs,  that is obtained by the other
party as a result of the contractual  relationship between the parties,  whether
obtained prior to or after the date hereof; provided, however, that Confidential
Matters shall not include information that (a) is or becomes generally available
to the public  other than as the result of  wrongful  disclosure  by a recipient
hereunder, its Affiliates or their respective representatives, (b) was available
to the  recipient,  its  Affiliates  or their  respective  representatives  on a
nonconfidential  basis  prior  to  disclosure  hereunder,  (c) is  independently
developed by the recipient hereunder or (d) becomes rightfully  available to the
recipient  from a third  party  that is under no  obligation  to  maintain  such
information as confidential.

         "Consolidated  Capitalization"  means the Capitalization of TDS and its
Subsidiaries determined on a consolidated basis as of the end of TDS's then most
recently reported fiscal year or quarter, as the case may be, including minority
interests in Subsidiaries.

         "Debt"  means  with  respect to a Person  (a) all  obligations  of such
Person  for  borrowed  money and all such  obligations  of any other  Person for
borrowed money  guaranteed by such Person,  (b) all amounts payable with respect
to leases which should be capitalized on such Person's  financial  statements in
accordance with GAAP and (c) any  indebtedness of such Person evidenced by notes
(other than short-term  trade debt incurred in the ordinary course of business),
bonds, debentures or similar instruments.

         "Default" means any Event of Default or any event that would constitute
an Event of Default but for the requirement  that notice be given or time elapse
or both.

         "Designated Placement Agent" means, with respect to the Rule 144A Notes
with  respect to Tranche A, the Rule 144A Notes with respect to Tranche B or the
Rule 144A Notes with respect to Tranche C, as the case may be, an underwriter or
placement agent selected by Nokia and reasonably  acceptable to APT for the sale
of such Rule 144A Notes in a Rule 144A Sale.

         "Environmental Action" means any administrative, regulatory or judicial
action,  suit,  demand,  demand  letter,  claim,  notice  of  non-compliance  or
violation,  investigation,   proceeding,  consent  order  or  consent  agreement
relating in any way to any Environmental


                                        4

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



Law or any Environmental Permit including,  without limitation, (a) any claim by
any  governmental or regulatory  authority for  enforcement,  cleanup,  removal,
response, remedial or other actions or damages pursuant to any Environmental Law
and  (b)  any  claim  by  any  third  party   seeking   damages,   contribution,
indemnification, cost recovery, compensation or injunctive relief resulting from
Hazardous  Materials  or  arising  from  alleged  injury  or threat of injury to
health, safety or the environment.

         "Environmental  Law" means any  federal,  state or local  law,  rule or
regulation, or any order, writ, judgment,  injunction,  decree, determination or
award  binding  upon APT or any  Subsidiary  and  relating  to the  environment,
health, safety or Hazardous Materials,  including,  without limitation,  CERCLA,
the  Resource   Conservation   and  Recovery   Act,  the   Hazardous   Materials
Transportation  Act, the Clean Water Act, the Toxic Substances  Control Act, the
Clean Air Act, the Safe  Drinking  Water Act, the Atomic Energy Act, the Federal
Insecticide,  Fungicide  and  Rodenticide  Act and the  Occupational  Safety and
Health Act.

         "Environmental  Permit"  means  any  permit,  approval,  identification
number, license or other authorization required under any Environmental Law.

         "ERISA" means the Employee  Retirement  Income Security Act of 1974, as
amended from time to time, and the  regulations  promulgated  and rulings issued
thereunder.

         "ERISA  Affiliate"  of any  Person  means  any  other  Person  that for
purposes of Title IV of ERISA is a member of such Person's  controlled group, or
under common control with such Person,  within the meaning of Section 414 of the
Internal Revenue Code.

         "ERISA Event" with respect to any Person means (a) the  occurrence of a
reportable  event,  within the meaning of Section 4043 of ERISA, with respect to
any Plan of such Person or any of its ERISA  Affiliates  which would result in a
material  liability  to pay money with  respect  to such Plan  unless the 30-day
notice  requirement  with respect to such event has been waived by the PBGC; (b)
the  provision  by the  administrator  of any Plan of such  Person or any of its
ERISA  Affiliates  of a notice of intent to  terminate  such Plan in a  distress
termination under Section 4041(c) of ERISA; (c) the cessation of operations at a
facility  of such  Person or any of its ERISA  Affiliates  in the  circumstances
described in Section 4062(e) of ERISA which would result in a material liability
to pay money with respect to a Plan; (d) the withdrawal by such Person or any of
its ERISA Affiliates from a Multiple  Employer Plan during a plan year for which
it was a substantial  employer,  as defined in Section 4001(a)(2) of ERISA which
would result in a material  liability  to pay money with respect to a Plan;  (e)
the failure by such Person or any of its ERISA Affiliates to make a payment to a
Plan required under Section 302(f)(1) of ERISA; (f) the adoption of an amendment
to a Plan of such Person or any of its ERISA Affiliates  requiring the provision
of  security  to  such  Plan,  pursuant  to  Section  307 of  ERISA;  or (g) the
institution by the PBGC


                                        5

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



of  proceedings  to  terminate  a Plan  of  such  Person  or  any  of its  ERISA
Affiliates, pursuant to Section 4042 of ERISA, or the occurrence of any event or
condition  described in Section 4042 of ERISA that  constitutes  grounds for the
termination of, or the appointment of a trustee to administer, such Plan.

         "Eurodollar Base Rate" means, for each day during each calendar month,
the rate of interest  reported in the Wall Street  Journal on the first Business
Day of such month in the "Money  Rates" column as the London  Interbank  Offered
Rate for United States dollar deposits of one month.

         "Eurodollar  Rate" means,  with respect to any Loan, the sum of (i) the
Eurodollar  Base  Rate,  plus  (ii) * * * per  annum  changing  when  and as the
Eurodollar Base Rate changes as reported in the Wall Street Journal on the first
Business Day of each month.

         "Event of Default" has the meaning specified in Section 6.1.

         "Facility Termination Date" means    *   *   *    or, if APT elects to
    *   *   *
                                      *      *     *       pursuant to Paragraph
2.2 of the Purchase Agreement and does not make an Acceleration Election, * * *

         "FAA" means the Federal Aviation Administration or any successor 
commission or agency.

         "FCC"  means the Federal  Communications  Commission  or any  successor
commission or agency having jurisdiction over a PCS Licensee.

         "FCC License"  means any telephone,  microwave or other  communications
license,  permit,  designation,  consent,  approval or authorization  granted or
issued by the FCC with  respect  to a PCS  System  or any  other  Communications
Related Business, whether for control, ownership, construction or operation.

         "Final Order" means an order,  license,  permit,  consent,  approval or
other   authorization   of  a  PCS  Authority  that  is  no  longer  subject  to
reconsideration or review by any court or administrative body.

         "Franchise"  means a  franchise,  permit,  license  (including  without
limitation  an  FCC  License),  designation  (including  but  not  limited  to a
designation as tentative selectee by the FCC), certificate, consent, approval or
other  authorization  granted or issued by a PCS  Authority  necessary for a PCS
Licensee to own, control, construct or operate a PCS System.



                                        6

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         "Franchise  Interest"  of any  Person  means  any  direct  or  indirect
ownership  interest in any other Person that is a PCS Licensee.  As used herein,
an ownership  interest means the lesser of a relevant  Person's voting or equity
interest.

         "GAAP" means generally accepted accounting  principles  consistent with
those  applied in the  preparation  of the financial  statements  referred to in
Section 4.5.

         "Hazardous  Materials"  means  (a)  petroleum  or  petroleum  products,
natural or synthetic gas,  asbestos in any form that is or could become friable,
urea formaldehyde  foam insulation and radon gas, (b) any substances  defined as
or included in the  definition of "hazardous  substances,"  "hazardous  wastes,"
"hazardous  materials,"  "extremely  hazardous  wastes,"  "restricted  hazardous
wastes," "toxic substances," "toxic pollutants," "contaminants" or "pollutants,"
or words of  similar  import,  under  any  Environmental  Law and (c) any  other
substance exposure to which is regulated under any Environmental Law.

         "Index Rate" means, as of any date, the number of basis points * * *
                                        *          *          *
on such date for calculations of        *          *          *
                                        *          *          *
             *      *      *      based on daily observations of New York bid 
quotes at the close of business in New York using a        *     *     *        
or, if such page shall not be published by     *   *   *   on such day, as 
published on          *     *     *
   * * * or, if such page is not published on the immediately preceding Business
Day or shall no longer be  published by * * * a successor  publication  or other
index mutually agreed to by APT and Nokia.

         "Insufficiency" means, with respect to any Plan, the amount, if any, of
its unfunded benefit liabilities, as defined in Section 4001(a)(18) of ERISA.

         "Interim Note" means a promissory  note, in  substantially  the form of
Exhibit A hereto, duly executed by APT.

         "Internal  Revenue  Code" means the Internal  Revenue Code of 1986,  as
amended from time to time, and the  regulations  promulgated  and rulings issued
thereunder.

         "Lien" means any mortgage,  pledge, security interest,  lien, charge or
other encumbrance.

         "Loan"  means an  extension  of credit to APT by Nokia  pursuant to the
terms of this  Agreement  to finance *** of the  purchase by APT of equipment or
services from Nokia pursuant to the Purchase Agreement.


                                        7

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         "Loan Documents" means this Agreement, the Interim Note and the TDS 
Guaranty.

         "Loan Parties" means TDS and APT.

         "Material  Adverse  Change"  means any material  adverse  change in the
business,  condition  (financial  or  otherwise),   operations,  performance  or
properties of TDS and its Subsidiaries taken as a whole.

         "Material  Adverse  Effect" means a material  adverse effect on (a) the
business, operations,  affairs, financial condition, assets or properties of TDS
and its  Subsidiaries  taken as a whole,  (b) the rights and  remedies  of Nokia
under the Loan  Documents  or (c) the  ability of any Loan Party to perform  its
obligations under the Loan Documents.

         "MTA"  means a  "Major  Trading  Area,"  as such  term is  defined  and
modified by the FCC for purposes of PCS licensing.

         "Multiemployer  Plan" of any  Person  means a  multiemployer  plan,  as
defined in Section 4001(a)(3) of ERISA, to which such Person or any of its ERISA
Affiliates  is making or accruing an obligation  to make  contributions,  or has
within any of the  preceding  five plan years made or accrued an  obligation  to
make contributions.

         "Multiple Employer Plan" of any Person means a single employer plan, as
defined in Section 4001(a)(15) of ERISA, that (a) is maintained for employees of
such Person or any of its ERISA  Affiliates  and at least one Person  other than
such Person and its ERISA  Affiliates or (b) was so maintained and in respect of
which such  Person or any of its ERISA  Affiliates  could have  liability  under
Section  4064 or 4069 of ERISA  in the  event  such  plan has been or were to be
terminated.

         "Nokia" means Nokia Telecommunications Inc., a Delaware corporation, 
and its successors and assigns.

         "Obligations"  means all  obligations  of APT to make any payment under
any Loan  Document,  whether of principal,  interest,  expenses or otherwise and
whether or not due.

         "PBGC" means the Pension Benefit Guaranty Corporation.

         "PCS" means personal communications services.

         "PCS Authority"  means the FCC, the FAA and each  regulatory  authority
(including but not limited to each public  utility  commission or public service
commission)  which has  jurisdiction  over the  control,  ownership,  licensing,
construction  or  operation of all or any part of any PCS System or provision of
any service by or in connection with a PCS System.


                                        8

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         "PCS Licensee"  means a Person that is authorized by Final Order of the
FCC to own, control and operate a PCS System.

         "PCS System" means a  radiotelephone  service  system  constructed  and
operated in an MTA, or other geographic service area within the United States or
any other U.S. commonwealth, territory, or possession.

         "Person" means an individual,  partnership,  limited liability company,
corporation   (including  a  business  trust),   joint  stock  company,   trust,
unincorporated  association,  joint venture or other entity,  or a government or
any political subdivision or agency thereof.

         "Placement  Agency Agreement" means an agreement among APT, TDS and the
Designated  Placement  Agent (or, if Nokia or one of its Affiliates is to be the
sole  purchaser  of Rule  144A  Notes  under  Section  2.6(c)(i),  2.7(c)(i)  or
2.8(c)(i),  Nokia or such  Affiliate)  for the sale in a Rule  144A Sale of Rule
144A Notes.

         "Plan" means a Single Employer Plan or a Multiple Employer Plan.

         "Prefunding  Amount" means,  as of any time, the sum of (a) all amounts
which shall have been designated on or before such time as a "Prefunding Amount"
under Section  2.6(c)(v),  Section  2.7(c)(v) or Section 2.8(c)(v) minus (b) all
amounts  which shall have been  applied on or before  such time to prepay  Loans
under Section 2.2(b).

         "Property"  of a  Person  means  any and all  property,  whether  real,
personal, tangible, intangible, or mixed, of such Person, or other assets owned,
leased or operated by such Person.

         "Purchase  Agreement"  means that  certain  PCS  Infrastructure  Supply
Contract  dated  March 1, 1996  between  APT and Nokia,  as it may be amended or
modified and in effect from time to time.

         "Registration Statement" has the meaning set forth in Section 4.6.

         "Rule 144A  Election"  means an  election  by APT  pursuant  to Section
2.6(a),  2.7(a) or  2.8(a)  to  pursue a sale of Rule 144A  Notes in a Rule 144A
Sale.

         "Rule 144A Notes" means, collectively, the Rule 144A Notes with respect
to Tranche  A, the Rule 144A  Notes with  respect to Tranche B and the Rule 144A
Notes with respect to Tranche C.

         "Rule  144A Notes with  respect to Tranche A" means  10-year  unsecured
zero  coupon  promissory  notes  issued by APT  between  October 1, 1996 and the
Tranche A Termination


                                        9

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



Date  pursuant  to Section  2.6 which  notes are (a) issued  pursuant to the APT
Indenture, (b) unconditionally  guaranteed by TDS pursuant to the APT Indenture,
(c) have an accretion rate per annum (computed on a semi-annual  bond equivalent
basis) equal to the sum of (i) ***
          * * * plus (ii) the  interest  rate per annum  applicable  to ten year
U.S. Treasury strips based on transactions at the time at which the price of the
Applicable Rule 144A Notes is determined (or, if the Tranche A Lock-In  Election
is made,  based on transactions on October 31, 1996), (d) callable by APT on and
after the fifth  anniversary of their issuance at the accreted  principal amount
on the  date of  payment  for  such  call  and (e) are  issued  in an  aggregate
principal amount payable at maturity equal to the result obtained by having $100
million (i.e.,  the original issue price) accrete from the date of issue to such
maturity at the accretion rate determined in clause (c) above.

         "Rule  144A Notes with  respect to Tranche B" means  10-year  unsecured
zero  coupon  promissory  notes  issued by APT  between * * * and the  Tranche B
Termination  Date pursuant to Section 2.7 which notes are (a) issued pursuant to
the APT  Indenture,  (b)  unconditionally  guaranteed by TDS pursuant to the APT
Indenture,  (c) have an accretion rate per annum (computed on a semi-annual bond
equivalent basis) equal to the sum of (i) either (A) if APT shall have sold Rule
144A Notes with  respect  to Tranche A in a Rule 144A Sale  pursuant  to Section
2.6(b)  on or  before  the  Tranche A  Termination  Date or shall  have made the
Acceleration Election, * * * or (B) otherwise the
             * * * plus (ii) the interest rate per annum  applicable to ten year
U.S. Treasury strips based on transactions at the time at which the price of the
Applicable Rule 144A Notes is determined (or, if the Tranche B Lock-In  Election
is made,  based on  transactions  on * * * (d)  callable by APT on and after the
fifth anniversary of their issuance at the accreted principal amount on the date
of payment  for such call and (e) are issued in an  aggregate  principal  amount
payable at maturity equal to the result obtained by having * * *
                  * * * accrete  from the date of issue to such  maturity at the
accretion rate determined in clause (c) above.

         "Rule  144A Notes with  respect to Tranche C" means  10-year  unsecured
zero  coupon  promissory  notes  issued by APT  between * * * and the  Tranche C
Termination  Date pursuant to Section 2.8 which notes are (a) issued pursuant to
the APT  Indenture,  (b)  unconditionally  guaranteed by TDS pursuant to the APT
Indenture,  (c) have an accretion rate per annum (computed on a semi-annual bond
equivalent  basis) equal to the sum of (i) either (A) if APT shall not have sold
Rule 144A  Notes  with  respect  to  Tranche A in a Rule 144A Sale  pursuant  to
Section 2.6(b) on or before the Tranche A Termination  Date, the Adjusted Spread
per  annum  or (B)  otherwise  * * * plus  (ii)  the  interest  rate  per  annum
applicable to ten year U.S. Treasury strips based on transactions at the time at
which the price of the Applicable Rule 144A Notes is determined * * *
                                  *   *   *                             (d)


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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



 callable  by APT on and after the fifth  anniversary  of their  issuance at the
accreted  principal  amount  on the date of  payment  for such  call and (e) are
issued in an aggregate  principal amount payable at maturity equal to the result
obtained by having * * *
         * * * accrete from the date of issue to such  maturity at the accretion
rate determined in clause (c) above.

         "Rule 144A Sale"  means a sale of Rule 144A Notes to one or more of the
following:   (a)  qualified  institutional  buyers  (as  defined  in  Rule  144A
promulgated  under the Securities Act), (b) institutional  accredited  investors
(as defined in Rule 501 of Regulation D promulgated  under the  Securities  Act)
and (c) offshore  investors (as permitted under  Regulation S promulgated  under
the Securities Act).

         "Sale and Leaseback  Transaction" means any arrangement with any Person
other than a Tax Consolidated  Subsidiary  providing for the leasing (as lessee)
by TDS of any property  (except for temporary  leases for a term,  including any
renewal thereof,  of not more than three years (provided that any such temporary
lease may be for a term of up to five years if (a) the Board of Directors of TDS
reasonably finds such term to be in the best interest of TDS and (b) the primary
purpose of the transaction of which such lease is a part is not to provide funds
to or  financing  for  TDS)),  which  property  has  been  or is to be  sold  or
transferred  by TDS (i) to any Subsidiary of TDS in the  contemplation  of or in
connection with such arrangement or (ii) to such other Person.

         "Section" means a numbered  section of this  Agreement,  unless another
document is specifically referenced.

         "Securities Act" means the Securities Act of 1933, as amended.

         "Single  Employer Plan" of any Person means a single  employer plan, as
defined in Section 4001(a)(15) of ERISA, that (a) is maintained for employees of
such Person or any of its ERISA  Affiliates and no Person other than such Person
and its ERISA  Affiliates or (b) was so maintained  and in respect of which such
Person or any of its ERISA Affiliates could have liability under Section 4069 of
ERISA in the event such plan has been or were to be terminated.

         "Solvent"  and  "Solvency"  mean,  with  respect  to  any  Person  on a
particular  date,  that on such date (a) the fair value of the  property of such
Person is  greater  than the total  amount of  liabilities,  including,  without
limitation, contingent liabilities, of such Person, (b) the present fair salable
value of the  assets of such  Person is not less  than the  amount  that will be
required  to pay the  probable  liability  of such  Person  on its debts as they
become  absolute and  matured,  (c) such Person does not intend to, and does not
believe that it will, incur debts or liabilities beyond such Person's ability to
pay as such debts and liabilities mature and


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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



(d) such Person is not engaged in business or a transaction, and is not about to
engage in business or a  transaction,  for which such  Person's  property  would
constitute an unreasonably small capital.  In computing the amount of contingent
liabilities at any time, it is intended that such  liabilities  will be computed
at an amount that, in light of all the facts  existing at such time,  represents
the  amount  that can  reasonably  be  expected  to become an actual or  matured
liability.

         "Subsidiary" of any Person means any  corporation,  partnership,  joint
venture,  trust or estate of which (or in which) more than 50% of (a) the issued
and  outstanding  capital stock having ordinary voting power to elect a majority
of the Board of Directors of such  corporation  (irrespective  of whether at the
time capital  stock of any other class or classes of such  corporation  shall or
might  have  voting  power  upon the  occurrence  of any  contingency),  (b) the
interest in the capital or profits of such  partnership  or joint venture or (c)
the  beneficial  interest  in such  trust or estate is at the time  directly  or
indirectly owned or controlled by such Person, by such Person and one or more of
its other Subsidiaries or by one or more of such Person's other Subsidiaries.

         "Tax Consolidated  Subsidiary" means a Subsidiary of TDS with which, at
the time a Sale and Leaseback  Transaction  is entered into by TDS, TDS would be
entitled to file a consolidated federal income tax return.

         "TDS" means Telephone and Data Systems, Inc., an Iowa corporation.

         "TDS Guaranty" means the Guaranty of TDS in  substantially  the form of
Exhibit C hereto,  as such Guaranty shall be amended or otherwise  modified from
time to time.

         "TDS  Indenture"  means  the  Indenture  dated as of  February  1, 1991
between TDS and Harris Trust and Savings Bank,  as Trustee,  as in effect on the
date hereof,  irrespective of whether the Indenture is  subsequently  amended or
terminated.

         "Tranche A Lock-In Election" has the meaning set forth in Section 
           2.6(a).

         "Tranche A Termination Date" shall mean October 31, 1996 or,  *  *  *
                                            *   *   *
                                            *   *   *

         "Tranche B Lock-In Election" has the meaning set forth in Section 
           2.7(a).

         "Tranche B Termination Date" shall mean     *   *   *     or, *  *   *
                                            *   *   *
                                            *   *   *



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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         "Tranche C Lock-In Election" has the meaning set forth in Section 
           2.8(a).

         "Tranche C Termination Date" shall mean   *   *   *    or,    *   *   *
                                            *   *   *
                                            *   *   *

         "Voting  Stock"  means  capital  stock  issued  by  a  corporation,  or
equivalent  interests in any other Person,  the holders of which are ordinarily,
in the absence of contingencies,  entitled to vote for the election of directors
(or persons performing similar functions) of such Person,  even though the right
so to vote has been suspended by the happening of such a contingency.

         "Welfare Plan" means a welfare plan, as defined in Section 3(1) of 
ERISA.

         "Withdrawal Liability" has the meaning specified in Part I of Subtitle 
E of Title IV of ERISA.



                                   ARTICLE II

                                   THE CREDITS


          2.1.    Commitment; Termination.  From and including the date of this 
Agreement and prior to the Facility Termination Date (but not during any period
when Nokia's obligation to make Loans is suspended pursuant to Section 2.6(d), 
2.7(d) or 2.8(d)), Nokia agrees, on the terms and conditions set forth in this 
Agreement, to make Loans in principal amounts not exceeding, in the aggregate 
for all of such Loans, the sum  of its Commitment minus all amounts to be paid 
by APT in cash pursuant to Section 2.6(d)(iii), 2.7(d)(iii) and 2.8(d)(iii), 
with each Loan being deemed made (without any request from APT) as of the
latest date APT is obligated pursuant to the terms of the Purchase Agreement to 
make a payment to Nokia for equipment or services purchased under the Purchase 
Agreement.  Each such Loan shall be equal in amount to     *   *   *
       *   *   *            and shall constitute payment of such amount. APT 
shall repay in full on        *   *   *       or the Tranche C Termination Date 
(whichever is later) to the unpaid principal amount of all Loans then 
outstanding.  Amounts repaid or prepaid under the Loan Documents may not be 
reborrowed.

          2.2.  Optional Principal Payments; Prefunding Amount.  (a)  APT may 
from time to time prepay, without penalty or premium, the unpaid principal 
amount of all or any portion of the outstanding Loans, together with accrued and
unpaid interest on the amount prepaid.


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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



                  (b) If  Nokia  makes  any Loan at a time  when the  Prefunding
Amount is greater than zero,  Nokia shall prepay such Loan on the date such Loan
is made in full or,  if less,  in the  amount of the  Prefunding  Amount at that
time.  Nokia  agrees  to  pay to APT  interest  in  cash  on the  amount  of the
Prefunding  Amount  monthly on the first  Business Day of each calendar month on
the average daily amount of such Prefunding Amount during the preceding calendar
month  at a rate  that  is the  monthly  equivalent  of the  rate  of  accretion
applicable to the Rule 144A Notes most recently issued. If the Prefunding Amount
on
         * * * is greater  than zero,  Nokia  shall hold such  amount and reduce
such amount  accordingly from time to time thereafter by application  thereof to
the  purchase  price of  equipment  and  services  purchased  under the Purchase
Agreement.

          2.3.    Method of Payment.  (a) All payments by or on behalf of APT
under the Loan Documents shall be made, in immediately available funds to Nokia 
by wire transfer to account number                 *   *   *
*   *   *           no later than 2:00 p.m. (New York  time) on the date when 
due.

                  (b) All  payments  by or on  behalf  of Nokia  under  the Loan
Documents shall be made, in immediately  available funds to APT by wire transfer
to account number
                                            *   *   *             no later
than 2:00 p.m. (New York  time) on the date when due.

          2.4.  Interim  Note.  APT's  obligation  to repay  the  Loans  will be
evidenced  by the  Interim  Note.  Nokia is  hereby  authorized  to  record  the
principal  amount  of each of the  Loans  and  each  repayment  on the  schedule
attached to the Interim Note, provided,  however,  that the failure to so record
shall not affect APT's  obligations  under the Interim Note or TDS's obligations
under the TDS Guaranty.

          2.5.  Interest  Payment  Dates;  Interest and Fee Basis.  (a) Interest
shall accrue on each Loan at the Eurodollar Rate in effect from time to time and
shall be  payable  on the  first  Business  Day of each  calendar  month for the
preceding  calendar  month and at maturity.  Interest  shall be  calculated  for
actual days elapsed on the basis of a 360-day  year.  Interest  shall be payable
for the day a Loan is made but not for the day of any payment on the amount paid
if  payment  is  received  prior to 2:00 p.m.  (New  York  time) at the place of
payment.  If any  payment of  principal  of or  interest on a Loan or fees shall
become due on a day which is not a Business  Day,  such payment shall be made on
the next succeeding  Business Day and, in the case of a principal payment,  such
extension of time shall be included in  computing  interest in  connection  with
such payment.

         (b) Notwithstanding the foregoing,  from and after the occurrence of an
Event  of  Default  and for so long  thereafter  as such  Event  of  Default  is
continuing,  interest  shall accrue on each Loan,  and on each other amount then
due and payable by APT under the Loan


                                       14

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



Documents,  at the rate described in Paragraph 5.7 of the Purchase Agreement and
shall be payable and calculated in accordance with subsection (a).

         2.6. Rule 144A Election in connection with Rule 144A Notes with respect
to Tranche A. (a) APT may,  at its sole  option,  make a Rule 144A  Election  in
connection with Rule 144A Notes with respect to Tranche A by delivering to Nokia
on or before  October 1, 1996  written  notice of APT's  decision to make a Rule
144A Election in  connection  with Rule 144A Notes with respect to Tranche A. If
Nokia  extends  the  Tranche A  Termination  Date  beyond  October  31,  1996 as
permitted  under the  definition of Tranche A Termination  Date, APT may make an
irrevocable election (the "Tranche A Lock-In Election") to have October 31, 1996
be the date as of which the accretion  rate and the aggregate  principal  amount
payable at maturity  shall be determined for the Rule 144A Notes with respect to
Tranche A by  delivering to Nokia on or before  October 31, 1996 an  irrevocable
written notice of such election.

         (b) If APT makes a Rule 144A  Election  pursuant  to Section  2.6(a) in
connection with Rule 144A Notes with respect to Tranche A:

         (i)      APT's  obligation to consummate a sale of such Rule 144A Notes
                  shall be conditioned  upon (A) the Rule 144A Sale of such Rule
                  144A  Notes  being  consummated  on or  before  the  Tranche A
                  Termination  Date  and (B) the APT  Indenture,  the  Placement
                  Agency Agreement and each offering  circular pursuant to which
                  such  Rule  144A  Notes  are  to  be  sold  being   reasonably
                  acceptable  to Nokia,  APT, TDS and the  Designated  Placement
                  Agent.

         (ii)     Nokia's  obligation to buy or accept delivery of any such Rule
                  144A Note  shall be  conditioned  upon (A) the  absence of any
                  Default,  (B)  either (x) the Rule 144A Sale of such Rule 144A
                  Notes  being  consummated  in part on or before the  Tranche A
                  Termination Date or (y) if no such Rule 144A Notes were sold,
                                               *   *   *
                                               *   *   *  the Rule 144A Sale of
                  such Rule 144A Notes         *   *   *
                                               *   *   *
                    * * * the  Rule  144A  Sale of such  Rule  144A  Notes on or
                  before  the  Tranche  A  Termination  Date  and  (C)  the  APT
                  Indenture,  the Placement  Agency  Agreement and each offering
                  circular pursuant to which such Rule 144A Notes are to be sold
                  being  reasonably  acceptable  to  Nokia,  APT,  TDS  and  the
                  Designated Placement Agent.

         (c) Upon  consummation  of a Rule  144A Sale of Rule  144A  Notes  with
respect  to Tranche A on or before the  Tranche A  Termination  Date or upon the
determination described in Section 2.6(b)(ii)(B) above:


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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         (i)      Nokia (or an Affiliate designated by it that is eligible to 
                  buy in a Rule 144A Sale) shall buy in such sale the Rule 144A 
                  Notes, if any, which are not bought by third parties,  
                  provided, however, that, at any time before APT, TDS and
                  the Designated Placement Agent sign the Placement Agency 
                  Agreement with respect to such Rule 144A Notes, Nokia may by 
                  written notice to APT and the Designated Placement Agent elect
                  to be the sole purchaser of such Rule 144A Notes (in which 
                  case such Rule 144A Notes shall be issued to Nokia under the
                  APT Indenture, the Placement Agency Agreement and each 
                  offering circular at a closing consummated pursuant to the 
                  Placement Agency Agreement).

         (ii)     The purchase price payable by Nokia for any such Rule 144A 
                  Notes it buys shall be      *   *   *
                                              *   *   *
                                              *   *   *    Nokia shall discharge
                  in full its obligation to pay such purchase price by:

                           (A) cancelling the unpaid  principal  amount of Loans
                  then  outstanding  in an amount equal to the lesser of (x) the
                  aggregate  unpaid principal amount of such Loans or (y) (1) if
                  Nokia  buys all such  Rule 144A  Notes,  * * * or (2) if Nokia
                  buys less than all of such Rule 144A Notes, * * *
                                                 *   *   *
                                                 *   *   *
                                                 *   *   *             and

                           (B)  complying  with its  obligations  under  Section
2.2(b) .

         (iii)    APT shall  cause all  proceeds of such sale paid by any Person
                  other  than  Nokia  to be  paid  in cash  to  Nokia  upon  the
                  consummation of such sale,

         (iv)     Upon receipt of such proceeds,  Nokia shall further cancel the
                  unpaid principal amount of Loans then outstanding in an amount
                  equal to the  lesser  of (A) the  aggregate  unpaid  principal
                  amount  of  such  Loans  after  giving  effect  to the  unpaid
                  principal  amount cancelled under clause (ii) above or (B) the
                  sum of * * * minus the  amount of  unpaid  principal,  if any,
                  cancelled under clause (ii) above.

         (v)      An amount equal to the sum of * * * minus the aggregate unpaid
                  principal cancelled under clauses (ii) and (iv) above shall be
                  a "Prefunding Amount".



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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         (d) If a Rule 144A  Election  in  connection  with Rule 144A Notes with
respect to Tranche A is not made pursuant to Section  2.6(a) or if such election
is made but the  conditions of Section  2.6(b)(ii)  shall not be satisfied on or
before the Tranche A Termination  Date,  then (i) Nokia shall have no obligation
to accept  Rule 144A Notes with  respect  to  Tranche A in  satisfaction  of any
unpaid principal amount of any Loan, (ii) APT shall prepay on or before November
1, 1996 the unpaid  principal amount of all Loans then outstanding (or, if less,
* * * of such  unpaid  principal  amount),  together  with  accrued  and  unpaid
interest on the principal amount prepaid, and (iii) APT shall thereafter pay all
amounts owed under the Purchase  Agreement in  accordance  with the terms of the
Purchase  Agreement (and not by any Loan hereunder) until APT has paid in total,
pursuant to this subsection, * * * * * * in cash. Thereafter, Loans may again be
made under Section 2.1.

         2.7. Rule 144A Election in connection with Rule 144A Notes with respect
to Tranche B. (a) APT may,  at its sole  option,  make a Rule 144A  Election  in
connection with Rule 144A Notes with respect to Tranche B by delivering to Nokia
on or before * * * * * * written  notice of APT's  decision  to make a Rule 144A
Election in connection  with Rule 144A Notes with respect to Tranche B. If Nokia
extends  the Tranche B  Termination  Date  beyond * * * as  permitted  under the
definition of Tranche B Termination  Date, APT may make an irrevocable  election
(the  "Tranche B Lock-In  Election") to have * * * * * * be the date as of which
the accretion rate and the aggregate  principal amount payable at maturity shall
be determined for the Rule 144A Notes with respect to Tranche B by delivering to
Nokia on or before * * * an irrevocable written notice of such election.

         (b) If APT makes a Rule 144A  Election  pursuant  to Section  2.7(a) in
connection with Rule 144A Notes with respect to Tranche B;

         (i)      APT's  obligation to consummate a sale of such Rule 144A Notes
                  shall be conditioned  upon (A) the Rule 144A Sale of such Rule
                  144A  Notes  being  consummated  on or  before  the  Tranche B
                  Termination  Date  and (B) the APT  Indenture,  the  Placement
                  Agency Agreement and each offering  circular pursuant to which
                  such  Rule  144A  Notes  are  to  be  sold  being   reasonably
                  acceptable  to Nokia,  APT, TDS and the  Designated  Placement
                  Agent.

         (ii)     Nokia's  obligation to buy or accept delivery of any such Rule
                  144A Note  shall be  conditioned  upon (A) the  absence of any
                  Default,  (B)  either (x) the Rule 144A Sale of such Rule 144A
                  Notes  being  consummated  in part on or before  theTranche  B
                  Termination Date or (y) if no such Rule 144A Notes were sold,
                                               *   *   *
                                               *   *   *   the Rule 144A Sale of
                  such Rule 144A Notes         *   *   *
                                               *   *   *


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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



                  * * * the Rule 144A Sale of such Rule 144A  Notes on or before
                  the Tranche B Termination Date and (C) the APT Indenture,  the
                  Placement Agency Agreement and each offering circular pursuant
                  to which such Rule 144A Notes are to be sold being  reasonably
                  acceptable  to Nokia,  APT, TDS and the  Designated  Placement
                  Agent.

         (c) Upon  consummation  of a Rule  144A Sale of Rule  144A  Notes  with
respect  to Tranche B on or before the  Tranche B  Termination  Date or upon the
determination described in Section 2.7(b)(ii)(B) above:

         (i)      Nokia (or an Affiliate designated by it that is eligible to 
                  buy in a Rule 144A Sale) shall buy in such sale the Rule 144A 
                  Notes, if any, which are not bought by third parties,  
                  provided, however, that, at any time before APT, TDS and
                  the Designated Placement Agent sign the Placement Agency 
                  Agreement with respect to such Rule 144A Notes, Nokia may by 
                  written notice to APT and the Designated Placement Agent elect
                  to be the sole purchaser of such Rule 144A Notes (in which 
                  case such Rule 144A Notes shall be issued to Nokia under the
                  APT Indenture, the Placement Agency Agreement and each 
                  offering circular at a closing consummated pursuant to the 
                  Placement Agency Agreement).

         (ii)     The purchase price payable by Nokia for any such Rule 144A 
                  Notes it buys shall be      *   *   *
                                              *   *   *
                                              *   *   *
                                              *   *   *    Nokia shall discharge
                  in full its obligation to pay such purchase price by:

                           (A) cancelling the unpaid  principal  amount of Loans
                  then  outstanding  in an amount equal to the lesser of (x) the
                  aggregate unpaid principal amount of such Loans or (y) (1) * *
                  *
                                               *   *   *
                              or (2)           *   *   *
                                               *   *   *
                                               *   *   *
                                               *   *   *
                                               *   *   *
                  *   *   *                                                and


                           (B)  complying  with its  obligations  under  Section
2.2(b) .



                                       18

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         (iii)    APT shall  cause all  proceeds of such sale paid by any Person
                  other  than  Nokia  to be  paid  in cash  to  Nokia  upon  the
                  consummation of such sale,

         (iv)     Upon receipt of such proceeds,  Nokia shall further cancel the
                  unpaid principal amount of Loans then outstanding in an amount
                  equal to the  lesser  of (A) the  aggregate  unpaid  principal
                  amount  of  such  Loans  after  giving  effect  to the  unpaid
                  principal  amount cancelled under clause (ii) above or (B) the
                  sum of
                                                       * * *
                  * * * minus the amount of unpaid principal,  if any, cancelled
                  under clause (ii) above.

         (v)      An amount equal to the sum of                       *  *  *
                         *  *  *          minus the aggregate unpaid principal
                  cancelled under clauses (ii) and (iv) above shall be a  
                  "Prefunding Amount".

         (d) If a Rule 144A  Election  in  connection  with Rule 144A Notes with
respect to Tranche B is not made pursuant to Section  2.7(a) or if such election
is made but the  conditions of Section  2.7(b)(ii)  shall not be satisfied on or
before the Tranche B Termination  Date,  then (i) Nokia shall have no obligation
to accept  Rule 144A Notes with  respect  to  Tranche B in  satisfaction  of any
unpaid principal amount of any Loan, (ii) APT shall prepay
          * * * the unpaid  principal  amount of all Loans then outstanding (or,
if less and APT shall not have made the Acceleration Election, * * *
           * * * together  with  accrued and unpaid  interest  on the  principal
amount  prepaid,  and (iii) APT shall  thereafter pay all amounts owed under the
Purchase  Agreement in accordance with the terms of the Purchase  Agreement (and
not by any  Loan  hereunder)  until  APT has  paid in  total,  pursuant  to this
subsection, * * *
          * * * Thereafter,  Loans may again be made under Section 2.1, provided
that no such  Loans  shall  be made if APT  shall  have  made  the  Acceleration
Election.

         2.8. Rule 144A Election in connection with Rule 144A Notes with respect
to Tranche C. (a) APT may,  at its sole  option,  make a Rule 144A  Election  in
connection with Rule 144A Notes with respect to Tranche C by delivering to Nokia
on or before * * *
  * * *  written  notice  of APT's  decision  to make a Rule  144A  Election  in
connection  with Rule 144A Notes with  respect to Tranche C;  provided  that APT
shall be deemed not to have made a Rule 144A  Election in  connection  with Rule
144A  Notes  with  respect  to Tranche C unless (i) APT * * * and (ii) APT shall
have elected
                       *  *  *                                         pursuant
to  Paragraph  2.2 of the  Purchase  Agreement.  If Nokia  extends the Tranche C
Termination  Date beyond * * * as permitted  under the  definition  of Tranche C
Termination  Date, APT may make an irrevocable  election (the "Tranche C Lock-In
Election") to have
*  *  *    be the date as of which the accretion rate and the aggregate 
principal amount


                                       19

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



payable at maturity  shall be determined for the Rule 144A Notes with respect to
Tranche  C by  delivering  to Nokia on or  before * * * an  irrevocable  written
notice of such election.

         (b) If APT makes a Rule 144A  Election  pursuant  to Section  2.8(a) in
connection with Rule 144A Notes with respect to Tranche C:

         (i)      APT's  obligation to consummate a sale of such Rule 144A Notes
                  shall be conditioned  upon (A) the Rule 144A Sale of such Rule
                  144A  Notes  being  consummated  on or  before  the  Tranche C
                  Termination  Date  and (B) the APT  Indenture,  the  Placement
                  Agency Agreement and each offering  circular pursuant to which
                  such  Rule  144A  Notes  are  to  be  sold  being   reasonably
                  acceptable  to Nokia,  APT, TDS and the  Designated  Placement
                  Agent.

         (ii)     Nokia's  obligation to buy or accept delivery of any such Rule
                  144A Note  shall be  conditioned  upon (A) the  absence of any
                  Default,  (B)  either (x) the Rule 144A Sale of such Rule 144A
                  Notes  being  consummated  in part on or before the  Tranche C
                  Termination Date or (y) if no such Rule 144A Notes were sold,
                                                     * * *
                           *  *  *                        the Rule 144A Sale of
                  such Rule 144A Notes          *   *   *
                                                *   *   *
                    * * * the  Rule  144A  Sale of such  Rule  144A  Notes on or
                  before  the  Tranche  C  Termination  Date  and  (C)  the  APT
                  Indenture,  the Placement  Agency  Agreement and each offering
                  circular pursuant to which such Rule 144A Notes are to be sold
                  being  reasonably  acceptable  to  Nokia,  APT,  TDS  and  the
                  Designated Placement Agent.

         (c) Upon  consummation  of a Rule  144A Sale of Rule  144A  Notes  with
respect  to Tranche C on or before the  Tranche C  Termination  Date or upon the
determination described in Section 2.8(b)(ii)(B) above:

         (i)      Nokia (or an Affiliate designated by it that is eligible to 
                  buy in a Rule 144A Sale) shall buy in such sale the Rule 144A 
                  Notes, if any, which are not bought by third parties, 
                  provided, however, that, at any time before APT, TDS and
                  the Designated Placement Agent sign the Placement Agency 
                  Agreement with respect to such Rule 144A Notes, Nokia may by 
                  written notice to APT and the Designated Placement Agent elect
                  to be the sole purchaser of such Rule 144A Notes (in which 
                  case such Rule 144A Notes shall be issued to Nokia under the
                  APT Indenture, the Placement Agency Agreement and each 
                  offering circular at a closing consummated pursuant to the 
                  Placement Agency Agreement).



                                       20

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         (ii)     The purchase price payable by Nokia for any such Rule 144A 
                  Notes it buys shall be        *   *   *
                                                *   *   *
                                                *   *   *  Nokia shall discharge
                  in full its obligation to pay such purchase price by:

                           (A) cancelling the unpaid  principal  amount of Loans
                  then  outstanding  in an amount equal to the lesser of (x) the
                  aggregate  unpaid principal amount of such Loans or (y) (1) if
                  Nokia buys all such Rule 144A Notes, * * * or (2) * * *
                                                *   *   *
                                                *   *   *
                                                *   *   *
                                                *   *   *        and


                           (B)  complying  with its  obligations  under  Section
2.2(b) .

         (iii)    APT shall  cause all  proceeds of such sale paid by any Person
                  other  than  Nokia  to be  paid  in cash  to  Nokia  upon  the
                  consummation of such sale,

         (iv)     Upon receipt of such proceeds,  Nokia shall further cancel the
                  unpaid principal amount of Loans then outstanding in an amount
                  equal to the  lesser  of (A) the  aggregate  unpaid  principal
                  amount  of  such  Loans  after  giving  effect  to the  unpaid
                  principal  amount cancelled under clause (ii) above or (B) the
                  sum of
                                                     *   *   *
                  *  *  *  (ii) above.

         (v)      An amount equal to the sum of                     *    *    *
                        *  *  *                (ii) and (iv) above shall be a 
                  "Prefunding Amount".

         (d) If a Rule 144A  Election  in  connection  with Rule 144A Notes with
respect to Tranche C is not made pursuant to Section  2.8(a) or if such election
is made but the  conditions of Section  2.8(b)(ii)  shall not be satisfied on or
before the Tranche C Termination  Date,  then (i) Nokia shall have no obligation
to accept  Rule 144A Notes with  respect  to  Tranche C in  satisfaction  of any
unpaid principal amount of any Loan, (ii) APT shall pay or prepay on or before *
* * the unpaid  principal  amount of all Loans then  outstanding,  together with
accrued and unpaid interest on the principal  amount paid or prepaid,  and (iii)
APT shall  thereafter  pay all  amounts  owed under the  Purchase  Agreement  in
accordance  with  the  terms  of the  Purchase  Agreement  (and  not by any Loan
hereunder).



                                       21

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         2.9 Change in TDS Credit Rating.  In the event that, prior to the issue
date of any of the Rule 144A Notes,  either  Standard & Poor's  Ratings Group or
Moody's Investors Service,  Inc. shall reduce (or increase) the rating of TDS to
less (or greater) than BBB or Baa3,  respectively,  then (a) the accretion  rate
applicable to any Rule 144A Notes issued thereafter shall be reset from the rate
provided herein based upon the recommendations of investment bankers selected by
Nokia and TDS,  at their  respective  expense,  to reflect  the  changed  credit
standing  of TDS and (b) the APT  Indenture  shall  be  amended  or  revised  to
incorporate  modified  terms,  covenants  and events of default to apply to Rule
144A Notes issued thereafter to similarly reflect the changed credit standing of
TDS (which modified terms, covenants and events of default it is understood will
be considered  in resetting the original  issue  discount  rate).  It is further
understood and agreed that the investment bankers will be guided by TDS's desire
to adhere as closely as possible to all of the terms outlined herein,  including
the originally  agreed to accretion  rates,  and by Nokia's desire that the Rule
144A  Notes  can be  sold in an  orderly  fashion  at the  initial  issue  price
contemplated herein for the Rule 144A Notes.

         2.10.    Expenses of Rule 144A Sales.  Nokia shall pay the following 
costs and expenses incurred by APT in connection with each sale of Rule 144A 
Notes pursuant to this agreement:     * * *
                                      * * *
                                      * * *
                                      * * *
                                      * * *
                                      * * *
                                      * * *
                                      * * *
                                      * * *







                                   ARTICLE III

                              CONDITIONS PRECEDENT


          3.1.    Credit Agreement.  This Agreement shall not become effective 
until the following documents shall have been delivered to Nokia, each (except 
under clauses (i) and


                                       22

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24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



(ii) below) dated the same date (the "Effective Date") and in form and substance
satisfactory to Nokia:

      (i)         A certificate of good standing of APT issued as of a recent 
                  date by the Secretary of State of the State of Delaware.

     (ii)         A certificate of existence of TDS issued as of a recent date
                  by the Secretary of State of the State of Iowa.

    (iii)         A certificate of the secretary or an assistant secretary of 
                  APT and of another officer of APT certifying as to (A) a true
                  and correct copy of the Certificate of Incorporation of APT 
                  and all amendments thereto in effect on the Effective
                  Date; (B) a true and correct copy of the by-laws of APT and 
                  all amendments thereto in effect on the Effective Date; (C) a
                  true and correct copy of the resolutions of the Board of 
                  Directors of APT authorizing the execution and delivery of the
                  Credit Agreement and the Interim Note and the performance of
                  the transactions contemplated thereby; and (D) the incumbency 
                  and signatures of the officers of APT executing the Credit 
                  Agreement and the Interim Note and such certificate.

     (iv)         A certificate of the secretary or an assistant secretary of 
                  TDS and of another officer of TDS certifying as to (A) a true 
                  and correct copy of the Certificate of Incorporation of TDS 
                  and all amendments thereto in effect on the Effective
                  Date; (B) a true and correct copy of the by-laws of TDS and 
                  all amendments thereto in effect on the Effective Date; (C) a 
                  true and correct copy of the resolutions of the Board of 
                  Directors of TDS authorizing the execution and delivery of the
                  TDS Guaranty and the performance of the transactions
                  contemplated thereby; and (D) the incumbency and signatures of
                  the officers of TDS executing the TDS Guaranty and such 
                  certificate.

      (v)         A certificate,  signed by the chief financial  officer of APT,
                  stating that on the  Effective  Date all  representations  and
                  warranties  of APT under this  agreement  are true and correct
                  and no Default has occurred and is continuing.

     (vi)         A written opinion of Sidley & Austin, counsel for APT and TDS,
                  addressed  to Nokia,  in  substantially  the form of Exhibit D
                  hereto.

     (vii)        The Interim  Note and a  counterpart  of this  Agreement  duly
                  executed  and  delivered  by APT  and the  TDS  Guaranty  duly
                  executed and delivered by TDS.

    (viii)        A  letter  signed  by  APT  with  respect  to  the  Designated
                  Placement  Agent and such other letters and documents as Nokia
                  shall reasonably request.


                                       23

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.




          3.2. Each Loan.  Nokia's  obligation to make any Loan shall be subject
to the further conditions  precedent that on the date of such Loan the following
statements  shall  be  true  (and  the  acceptance  by APT of  such  Loan  shall
constitute  a  representation  and warranty by APT that on the date of such Loan
such statements are true):

                  (i) the representations and warranties  contained in each Loan
         Document  are  correct on and as of such date  before and after  giving
         effect to such Loan as though made on and as of such date; and

                  (ii) no event has occurred and is continuing,  or would result
         from such Loan or from the application of the proceeds therefrom,  that
         constitutes a Default.


                                   ARTICLE IV

                         REPRESENTATIONS AND WARRANTIES


         APT  represents and warrants to Nokia that as of the date hereof and as
of the date of each Loan:

          4.1.  Corporate Existence and Standing.  APT is a corporation duly 
incorporated, validly existing and in good standing under the laws of the State
of Delaware and has all requisite authority to conduct its business in each 
jurisdiction in which its business is conducted.

          4.2.  Authorization  and  Validity.  APT has the  corporate  power and
authority  and legal  right to execute and  deliver  the Loan  Documents  and to
perform its  obligations  thereunder.  The  execution and delivery by APT of the
Loan Documents and the performance of its obligations  thereunder have been duly
authorized by proper corporate  proceedings,  and the Loan Documents  constitute
legal,  valid  and  binding  obligations  of  APT  enforceable  against  APT  in
accordance  with  their  terms,  except  as  enforceability  may be  limited  by
bankruptcy,  insolvency or similar laws affecting the  enforcement of creditors'
rights  generally.  This Agreement has been, and the Interim Note when delivered
hereunder will have been, duly executed and delivered by APT.

          4.3.  No  Conflict;  Government  Consent.  Neither the  execution  and
delivery by APT of the Loan Documents,  nor the consummation of the transactions
therein  contemplated,  nor compliance with the provisions  thereof will violate
any law, rule, regulation,  order, writ, judgment,  injunction,  decree or award
binding  on  APT  or  APT's  certificate  of  incorporation  or  by-laws  or the
provisions of any indenture, instrument or agreement to which APT or any


                                       24

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



of its  Subsidiaries is a party or is subject,  or by which it, or its Property,
or any of its Subsidiaries or any of their respective  Properties,  is bound, or
conflict with or constitute a default  thereunder,  or result in the creation or
imposition of any Lien in, of or on the Property of APT pursuant to the terms of
any  such  indenture,  instrument  or  agreement.  Neither  APT  nor  any of its
Subsidiaries  is in violation of any such law, rule,  regulation,  order,  writ,
judgment,   injunction,  decree,  determination  or  award,  including,  without
limitation,  the Communications  Act, or the terms of any Franchise or in breach
of any such contract, loan agreement,  indenture, mortgage, deed of trust, lease
or other  instrument  which violation or breach could  reasonably be expected to
have  a  Material  Adverse  Effect.  No  order,  consent,   approval,   license,
authorization,  or validation of, or filing,  recording or registration with, or
exemption by, any  governmental or public body or authority,  or any subdivision
thereof (including, without limitation, the FCC, any other PCS Authority, or any
other  Federal  agency or any  state,  county or  municipal  agency,  authority,
commission  or  council,  and,  if  applicable,  telephone  companies  and other
entities  exercising  jurisdiction  over the  provision of PCS  services) or any
other third party,  is required to authorize,  or is required in connection with
the execution,  delivery and performance of, or the legality,  validity, binding
effect or enforceability of, any of the Loan Documents.

         4.4.  Representations  under  Note  Purchase  Documents.  Each  of  the
representations  and warranties of APT and of TDS made in or pursuant to the APT
Indenture and in each Placement Agency Agreement pursuant to which any Rule 144A
Notes are to be sold, and each of the representations and warranties of TDS made
in or pursuant to the TDS Guaranty and any guaranty by TDS of obligations of APT
with  respect to any Rule 144A  Notes,  are true and  correct as if set forth in
full and made independently in this Agreement.

         4.5.  Financial  Statements.  APT has  delivered to Nokia copies of the
consolidated financial statements of APT and its Subsidiaries listed in Schedule
4.5.  All of such  financial  statements  (including  in each  case the  related
schedules  and notes,  if any)  fairly  present  in all  material  respects  the
consolidated financial position of APT and its Subsidiaries as of the respective
dates  specified  in  such  Schedule  4.5  and  their  consolidated  results  of
operations and their  consolidated cash flows for the respective periods therein
specified and have been prepared in accordance  with GAAP  consistently  applied
throughout the periods  involved,  except as set forth in the notes thereto,  if
any  (subject,  in the  case of the  interim  financial  statements,  to  normal
year-end adjustments).

         4.6.  Disclosure.  APT has delivered to Nokia a copy of a  Registration
Statement which the Company filed with the Securities and Exchange Commission on
March 29,  1996 (the  "Registration  Statement")  relating  to the  transactions
contemplated  hereby.  The  Registration  Statement  fairly  describes,  in  all
material  respects,  the  general  nature  of the  business  and  the  principal
properties of APT and its  Subsidiaries as of such date.  Except as disclosed in
Schedule  4.6,  this  Agreement,  the  Registration  Statement,  the  documents,
certificates  and other  writings  identified  in Schedule 4.6 and  delivered to
Nokia by or on


                                       25

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



behalf of APT in connection with the  transactions  contemplated  hereby and the
financial  statements  listed in Schedule 4.5, taken as a whole,  do not contain
any untrue  statement  of a  material  fact or omit to state any  material  fact
necessary to make the statements therein not misleading as of such date in light
of the  circumstances  under which they were made.  Except as  disclosed  in the
Registration  Statement or as expressly described in Schedule 4.6, in any of the
documents, certificates or other writings identified therein or in the financial
statements  listed in Schedule 4.5,  since  12/31/95  there has been no Material
Adverse Change.

         4.7. Proceedings.  There is no action, suit, investigation,  litigation
or  proceeding  affecting  TDS  or  any  of  its  Subsidiaries,   including  any
Environmental  Action,  pending or  threatened  before  any court,  governmental
agency or  arbitrator,  including  without  limitation  the FCC or any other PCS
Authority, that (i) purports to affect the legality,  validity or enforceability
of this Agreement or the Interim Note or the  consummation  of the  transactions
contemplated  hereby or by the APT  Indenture or the Purchase  Agreement or (ii)
would reasonably be expected to have a Material Adverse Effect.

         4.8.  ERISA.  No ERISA Event has occurred or is reasonably  expected to
occur with respect to any Plan of APT or any of its ERISA Affiliates which would
have a Material Adverse Effect.  Neither APT nor any of its ERISA Affiliates has
incurred or is  reasonably  expected to incur any  Withdrawal  Liability  to any
Multiemployer  Plan  which  would have a Material  Adverse  Effect.  To the best
knowledge of APT,  neither APT nor any of its ERISA Affiliates has been notified
by the  sponsor of a  Multiemployer  Plan of APT or any of its ERISA  Affiliates
that such Multiemployer Plan is in reorganization or has been terminated, within
the meaning of Title IV of ERISA, and no such  Multiemployer  Plan is reasonably
expected  to be in  reorganization  or to be  terminated,  within the meaning of
Title IV of ERISA,  which  reorganization  or termination  would have a Material
Adverse Effect. The aggregate  annualized cost (including,  without  limitation,
the cost of insurance  premiums) with respect to post-retirement  benefits under
Welfare  Plans for which APT and its  Subsidiaries  are  liable  does not exceed
$1,500,000.00

         4.9. Environmental.  The operations of APT and each of its Subsidiaries
comply in all material  respects  with all  Environmental  Laws,  all  necessary
Environmental  Permits have been  obtained and are in effect for the  operations
and  properties of APT and its  Subsidiaries,  APT and its  Subsidiaries  are in
compliance in all material respects with all such Environmental Permits. None of
the properties of APT or any of its  Subsidiaries  is listed or to its knowledge
proposed  for listing on the  National  Priorities  List under  CERCLA or on the
Comprehensive  Environmental  Response,  Compensation and Liability  Information
System maintained by the Environmental  Protection Agency or any analogous state
list of  sites  requiring  investigation  or  cleanup  and to its  knowledge  no
underground  storage  tanks,  as such term is defined in 42 U.S.C.ss.  6991, are
located on any property of APT or any of its  Subsidiaries.  Neither APT nor any
of its  Subsidiaries has transported or arranged for the  transportation  of any
Hazardous  Materials to any  location  that is listed or proposed for listing on
the National Priorities List


                                       26

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



under CERCLA or any analogous  statute.  Neither APT nor any of its Subsidiaries
has  generated,  used,  treated,  handled,  stored or disposed of any  Hazardous
Materials on, or released or transported any Hazardous Materials to or from, any
property of APT or any of its  Subsidiaries  except in material  compliance with
all Environmental Laws and Environmental Permits, and all other wastes generated
at any such  properties  have been disposed of in material  compliance  with all
Environmental Laws and Environmental Permits.

         4.10.    Taxes.  APT and each of its Subsidiaries has filed, has caused
to be filed or has been included in all tax returns (Federal, state, local and 
foreign) required to be filed and has paid all taxes shown thereon to be due, 
together with applicable interest and penalties.

         4.11.    Solvency.  APT is, individually and together with its 
Subsidiaries, Solvent.

         4.12.  Compliance  with Laws.  APT and each of its  Subsidiaries  is in
compliance with the  requirements of all applicable  laws,  rules,  regulations,
orders,  applications,  reporting and licensing requirements of all governmental
authorities  non-compliance  with which is reasonably  likely to have a Material
Adverse  Effect;  and  neither  APT nor any  Subsidiary  is the  subject  of any
outstanding citation, order or investigation by any PCS Authority.

         4.13.  PCS  Licenses.  Schedule  4.13 sets forth a complete and correct
list,  all as of the date hereof in the case of Schedule  4.13  attached to this
Agreement and as of the date of each update of such Schedule 4.13 in the case of
each such  update,  of (i) each PCS  Licensee in which  either APT or any of its
Subsidiaries  has any  Franchise  Interest,  (ii) each MTA such PCS  Licensee is
authorized to serve by the FCC, (iii) the name of such  Subsidiary that owns any
such interest, (iv) the form, class and percentage ownership and voting interest
of  each  therein,  (v)  each  existing  agreement  for the  acquisition  of any
additional Franchise Interest or the disposition thereof and whether the consent
or approval  thereof by one or more PCS Authorities is necessary and, if so, (A)
the name of each PCS  Authority  whose  consent and  approval is  required,  (B)
whether such  consents and  approvals  have been  obtained,  and (C) whether the
orders  granting such  consents and  approvals  are Final  Orders,  and (vi) the
percentage  of all  outstanding  Franchise  Interests  owned or  subject  to any
agreement to purchase or sell or any option,  put or call to which either APT or
any of its  Subsidiaries  is a party.  Schedule 4.13 correctly  lists as of such
date each Franchise, including (without limitation) each FCC License, granted or
issued by any PCS  Authority to either APT or any of its  Subsidiaries,  the PCS
Authority  granting or issuing such Franchise,  and the geographic area to which
such  Franchise  relates and the expiration  date thereof,  if any. In addition,
Schedule 4.13 discloses as of such date all rights of first refusal, options and
other such rights or obligations in existence  (including,  without  limitation,
entitlements  to  acquire  additional   ownership  interests  and  supermajority
provisions) which may affect the


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24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



ownership interests (or diminish the rights associated  therewith) of either APT
or any of its Subsidiaries in any such PCS Licensee or other Person.

         4.14. Franchise Interests. APT or one of its Subsidiaries,  as the case
may be, plan to obtain the respective  Franchise,  easement,  equipment  rental,
interconnection  agreement,  and  other  contractual  rights  necessary  for the
conduct of the business as now  conducted of each PCS System in which it has any
Franchise  Interest  (other than any PCS System with  respect to Alaska or Guam)
and is in compliance  with all material terms and conditions  therewith.  To the
knowledge of APT and its Subsidiaries,  no event has occurred that would prevent
either APT or any of its  Subsidiaries  from obtaining any Franchise,  easement,
equipment rental, interconnection agreement or other contractual right necessary
for the future  conduct of the  business  of each PCS System in which it has any
Franchise  Interest,  as now  contemplated.  Each such Franchise is valid and in
full force and effect,  and APT and each of its  Subsidiaries  has fulfilled and
performed all of its material obligations with respect thereto and has no reason
to believe and no knowledge  that any such  Franchise will not be renewed in the
ordinary course. Neither APT nor any of its Subsidiaries knows of any fact which
(i)  could  result  in  either  APT  or  any of  its  Subsidiaries  being  found
unqualified  to hold, or which permits (or after notice or lapse of time or both
would permit) the failure to grant, revocation or termination of, any Franchise,
or the  denial of an  application  for the grant or  renewal  thereof or (ii) is
reasonably  likely to materially  and adversely  affect any right of APT and its
Subsidiaries, taken as a whole, thereunder (other than the possible sale
 of Franchises with respect to Alaska and Guam. APT and each of its Subsidiaries
has paid all franchise,  license or other fees and charges which have become due
pursuant  to any  Franchise  in respect of any of its PCS  Systems  and has made
adequate provisions for any such fees and charges which have accrued.

         4.15. Properties. All material properties, equipment and systems of APT
and its Subsidiaries  which have been or will be acquired in connection with any
system  expansion or construction  are or will be in good repair,  working order
and condition and are and are anticipated to be in material  compliance with all
applicable Franchises (including,  without limitation, all FCC Licenses) and all
standards and rules imposed by any PCS Authority.

         4.16. Regulatory Matters. Neither APT nor any of its Subsidiaries is an
"investment  company," or an "affiliated person" of, or "promoter" or "principal
underwriter"  for,  an  "investment  company,"  as such terms are defined in the
Investment Company Act of 1940, as amended.  Neither the making of any Loan, nor
the  application  of  the  proceeds  or  repayment   thereof  by  APT,  nor  the
consummation of the other  transactions  contemplated  hereby,  will violate any
provision of such Act or any rule,  regulation  or order of the  Securities  and
Exchange  Commission  thereunder.   APT  is  not  a  "holding  company,"  or  an
"affiliate"  of a "holding  company" or of a "subsidiary  company" of a "holding
company," as such terms are defined in the Public Utility Holding Company Act of
1935, as amended.



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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         4.17     Use of Proceeds.  APT will use the Loans exclusively to 
finance the purchase of equipment and services from Nokia pursuant to the 
Purchase Agreement.





                                    ARTICLE V
                                    COVENANTS

                  5.1.  Affirmative Covenants.  So long as any Loan or the 
Interim Note shall remain unpaid or Nokia shall have any Commitment hereunder or
shall be the holder of all of the Rule 144A Notes then issued and outstanding, 
APT will:

                  (a) Compliance with Laws, Etc.  Comply,  and cause each of its
         Subsidiaries to comply with all applicable laws, rules, regulations and
         orders, such compliance to include, without limitation, compliance with
         the Communications Act except to the extent non-compliance would not be
         reasonably expected to have a Material Adverse Effect.

                  (b) Payment of Taxes,  Etc. Pay and discharge,  and cause each
         of its Subsidiaries to pay and discharge,  before the same shall become
         delinquent,  (i) all taxes,  assessments  and  governmental  charges or
         levies  imposed upon it or upon its property and (ii) all lawful claims
         that,  if  unpaid,  might  by law  become  a Lien  upon  its  property;
         provided,  however, that APT and its Subsidiaries shall not be required
         to pay or discharge any such tax,  assessment,  charge or claim that is
         being contested in good faith and by proper proceedings and as to which
         appropriate  reserves are being  maintained,  unless and until any Lien
         resulting  therefrom  attaches to its property and becomes  enforceable
         against its other creditors.

                  (c) Compliance with Environmental Laws. Comply, and cause each
         of its  Subsidiaries  and all lessees and other  Persons  occupying its
         properties to comply, in all material respects,  with all Environmental
         Laws  and  Environmental  Permits  applicable  to  its  operations  and
         properties;  obtain and renew all  Environmental  Permits necessary for
         its  operations  and  properties;  and  conduct,  and cause each of its
         Subsidiaries to conduct, any necessary  investigation,  study, sampling
         and testing, and undertake any necessary cleanup,  removal, remedial or
         other action  necessary to remove and clean up all Hazardous  Materials
         from any of its  properties,  in  accordance  with and as  required  by
         applicable Environmental Laws; provided,  however, that neither APT nor
         any of its  Subsidiaries  shall  be  required  to  undertake  any  such
         cleanup,  removal,  remedial  or other  action to the  extent  that its
         obligation to


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24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         do so is being  contested in good faith and by proper  proceedings  and
         appropriate   reserves  are  being  maintained  with  respect  to  such
         circumstances.

                  (d) Maintenance of Insurance.  Maintain, and cause each of its
         Subsidiaries  to maintain,  insurance  with  responsible  and reputable
         insurance  companies or  associations in such amounts and covering such
         risks as is usually carried by companies engaged in similar  businesses
         and owning similar properties in the same general areas in which APT or
         such Subsidiary operates.

                  (e) Preservation of Corporate Existence, Etc. Obtain, preserve
         and maintain,  and cause each of its  Subsidiaries to obtain,  preserve
         and maintain, (i) its corporate or partnership  existence,  as the case
         may be, rights,  franchises and privileges in the  jurisdiction  of its
         organization,   and  qualify  and  remain  qualified,  and  cause  each
         Subsidiary to qualify and remain qualified, as a foreign corporation or
         partnership,  as the case may be, in each  jurisdiction  in which  such
         qualification  is necessary in view of its business and  operations  or
         the  ownership  of its  properties,  except  where  the  failure  to be
         qualified as a foreign  corporation or partnership in  jurisdictions is
         not reasonably  likely to have a Material Adverse Effect,  and (ii) all
         approvals,  authorizations,  licenses, franchises and other permissions
         of all PCS Authorities and other governmental, judicial, regulatory and
         other  agencies  necessary  to enable APT to operate and  maintain  its
         property,  business and  operations as the same  generally is currently
         being  carried on or as it may  hereafter  be carried on in  accordance
         with the Loan Documents.

                  (f) Visitation Rights. At any reasonable time and from time to
         time following the occurrence and during the continuance of an Event of
         Default upon reasonable  notice during normal  business  hours,  permit
         Nokia or any agents or  representatives  thereof,  to examine  and make
         copies of and  abstracts  from the records and books of account of, and
         visit the  properties of APT, and to discuss the affairs,  finances and
         accounts of APT with any of their  officers or directors and with their
         independent certified public accountants.

                  (g) Keeping of Books. Keep, and cause each of its Subsidiaries
         to keep, proper books of record and account,  in which full and correct
         entries shall be made of all financial  transactions and the assets and
         business of APT and each such  Subsidiary in accordance  with generally
         accepted accounting principles in effect from time to time.

                  (h)      Maintenance of Properties, Etc.  Maintain and 
         preserve, to the extent that the management of APT in its reasonable 
         business judgment deems such maintenance and preservation necessary or 
         reasonably useful in the proper conduct of the business of APT, all of 
         its properties in good working order and condition,


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24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         ordinary wear and tear  excepted,  except where the failure to do so is
         not, individually or in the aggregate, reasonably likely to result in a
         Material  Adverse  Effect;  and at all times do or cause to be done all
         things necessary to obtain,  preserve, renew and keep in full force and
         effect all Franchises,  patents, copyrights,  trademarks, service marks
         and trade  names,  except when the  failure to do so is not  reasonably
         likely to result in a Material Adverse Effect.

                  (i) Compliance with Terms of Leaseholds. Make all payments and
         otherwise  perform  all  obligations  in  respect of all leases of real
         property,  keep such leases in full force and effect and not allow such
         leases to lapse or be  terminated or any rights to renew such leases to
         be  forfeited  or  canceled,  except  where any failure to do so is not
         reasonably likely, taken alone or otherwise, to have a Material Adverse
         Effect.

                  (j) Completion of PCS Systems.  Cause each of its Subsidiaries
         to  comply  with  all  requirements  of  any  PCS  Authority  or  other
         governmental authority (including without limitation any requirement of
         the  FCC  under  the  Communications  Act or  any  applicable  rule  or
         regulation  issued  thereunder  from time to time) to  complete or meet
         each   construction  or  in  service  deadline  or  other  "build  out"
         requirement (other than with respect to a Franchise for Alaska or Guam)
         if the  failure  to meet such  deadline  or  requirement  would  have a
         Material Adverse Effect.

                  (k)      Purchase Agreement.  APT shall duly and promptly 
         perform each and every covenant and obligation on its part to be 
         performed under the Purchase Agreement.

                  (l) Rule 144A  Offerings.  APT will  cooperate  with Nokia and
         will  endeavor to facilitate  each Rule 144A Sale  described in Article
         II, and will:

                  (i)      exercise its best efforts to obtain for each issuance
                           of Rule 144A  Notes  under  Article  II from  Moody's
                           Investor Service,  Inc. and Standard & Poor's Ratings
                           Group a rating at least as favorable as the rating of
                           senior unsecured  long-term debt issued by TDS at the
                           time of such Rule 144A Sale;

                  (ii)     provide to the  Designated  Placement  Agent (and, if
                           requested  by  Nokia,   to  Nokia  as  a  prospective
                           purchaser)    reasonable    access   to   facilities,
                           management,  employees,  books and records of APT and
                           TDS in order to facilitate customary due diligence;

                  (iii)    prepare, in conjunction with the Designated Placement
                           Agent, a preliminary confidential offering circular, 
                           and a final confidential


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24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



                           offering circular, relating to APT, TDS and the 
                           applicable Rule 144A Notes and furnish copies as 
                           reasonably requested;

                  (iv)     enter  into a  Placement  Agency  Agreement  with the
                           Designated   Placement   Agent  (or,  to  the  extent
                           applicable,  with Nokia or an Affiliate designated by
                           Nokia) with respect to the purchase of the applicable
                           Rule  144A  Notes by  investors  (or,  to the  extent
                           applicable,   Nokia  or  such  Affiliate)  containing
                           standard terms  reasonably  satisfactory to APT, TDS,
                           Nokia (as a prospective purchaser) and the Designated
                           Placement Agent with respect to:

                           (A)      representations  and warranties,  including,
                                    without   limitation,   representations  and
                                    warranties   regarding   the   business  and
                                    operations of TDS and APT,  authorization of
                                    transactions,    Rule   144A   and   private
                                    placement  related  matters and  contents of
                                    each offering circular;

                           (B)      customary  opinions of  counsel,  including,
                                    without   limitation,   opinions   regarding
                                    disclosures    about   the    business   and
                                    operations of TDS and APT, the authorization
                                    of  the  transaction,  the  contents  of the
                                    final offering circular,  Rule 144A, private
                                    placement  related  matters  and  a  "10b-5"
                                    opinion;

                           (C)      "comfort" letters (and bring downs thereof) 
                                    from the independent accountants;

                           (D)      indemnification of the Designated  Placement
                                    Agent (or, to the extent  applicable,  Nokia
                                    or  such   Affiliate)  and  related  Persons
                                    substantially   in   the   form   previously
                                    provided; and

                           (E)      covenants,  including,  without  limitation,
                                    covenants  regarding  private  placement and
                                    Rule  144A   compliance,   notification   of
                                    material   changes  to  disclosures  in  the
                                    offering   documents  and   preparation   of
                                    amendments thereto;

                  (v)      cooperate in the "blue sky" qualification process, 
                           global note/DTC arrangements and, if appropriate, 
                           PORTAL listing process; and



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24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



                  (vi)     enter into such other  agreements  and take all other
                           reasonable  actions as  appropriate to facilitate the
                           offering of the Rule 144A Notes,  including provision
                           of customary closing certificates.

         5.2. Negative Covenants.  So long as any Loan or the Interim Note shall
remain  unpaid or Nokia  shall  have any  Commitment  hereunder  or shall be the
holder of all of the Rule 144A Notes then issued and outstanding,  APT will not,
at any time, without the written consent of Nokia:

                  (a) Mergers,  Etc. Enter into any transaction  with any Person
         involving  a  merger  or   consolidation   or   amalgamation  or  other
         restructuring,  or liquidate,  wind up or assign, transfer or otherwise
         dispose  of, all or  substantially  all of its  property,  business  or
         assets whether now owned or hereafter  acquired or consolidate with any
         Person or permit any Person to merge  into it;  provided  that APT may,
         without the written  consent of Nokia,  enter into such  transaction or
         take such  actions if (i) such  Person  (if other  than APT)  expressly
         assumes,  in an agreement  satisfactory in form and substance to Nokia,
         the due and  punctual  payment of the  principal of and interest on all
         Loans and the due and punctual  performance of all other obligations of
         APT under the Loan Documents; provided, further, that such Person shall
         be either  (i) a Person  organized  and  existing  under the laws of he
         United States,  any state thereof or the District of Columbia or (ii) a
         Person  organized  and  existing  under  the  laws  of  Canada,  Japan,
         Australia,  New  Zealand,  any  nation  in  Western  Europe  or of  any
         political  subdivision of any thereof and such Person undertakes to pay
         Nokia and any other holder of the Interim Note any  additional  amounts
         as may be necessary in order that every net payment of principal of any
         interest  on the  Loans,  after  withholding  for or on  account of any
         present or future tax,  assessment or governmental  charge imposed upon
         Nokia or such holder  (except for a tax,  assessment or charge  imposed
         solely  as a result  of a  connection  between  the  recipient  and the
         jurisdiction  imposing such tax,  assessment or charge) by reason of or
         as a result of such  payment  being  made by an  entity  which is not a
         Person  existing  under  the laws of the  United  States  or any  state
         thereof or the District of  Columbia,  will not be less than the amount
         provided  for in the Loan  Documents  to be then due and  payable;  and
         provided,  further,  that  immediately  after  giving  effect  to  such
         transaction  (and  treating  any  Secured  Debt or Sale  and  Leaseback
         Transaction  (as those  terms are defined in the TDS  Indenture)  which
         becomes an obligation of such Person as a result of such transaction as
         having been incurred or entered into by such Person at the time of such
         transaction  ), no Default shall have occurred and be  continuing;  and
         (ii) TDS shall have delivered to Nokia a written consent of TDS to such
         transaction confirming the unqualified continuing  effectiveness of its
         guaranty   under  the  TDS  Guaranty   after  giving   effect  to  such
         transaction.



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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



                  (b) Change in Nature of Business.  Make any material 
         change in the nature of its business as carried on at the date hereof.

                  (c) Charter   Amendments.    Permit   its   certificate   of
         incorporation  or  the  certificate  of  incorporation  of  any  of its
         Subsidiaries to contain the provision permitted by Section 102(b)(2) of
         the General  Corporation  Law of the State of  Delaware,  or amend,  or
         permit  any  of  its   Subsidiaries   to  amend,   its  certificate  of
         incorporation  or by-laws except where such amendment  could not have a
         Material Adverse Effect.

                  (d) Accounting Changes.  Make or permit any change in 
         accounting policies or reporting practices, except as required by or 
         advisable under generally accepted accounting principles.

                  (e) No  Negative  Pledge  Covenant.  Enter  into or  suffer to
         exist,  or permit  any of its  Subsidiaries  to enter into or suffer to
         exist,  any agreement  with any party with claims  against APT that are
         guaranteed by TDS which agreement  prohibits or conditions the creation
         or assumption of any Lien upon any of its property or assets other than
         (i) in favor of Nokia,  (ii) with respect only to the assets so leased,
         capitalized  leases, (ii) with respect only to the assets so purchased,
         purchase money liens or (iv) with respect only to such assets, Liens on
         assets  acquired by APT or any of its  Subsidiaries in existence at the
         time of such  acquisition  and not  created  in  connection  with or in
         contemplation of such acquisition.

                  (f) Legal  Compliance.  Take or fail to take, or permit any of
         its  Subsidiaries  to take or fail to take, any action that would cause
         APT to be  unqualified  to own,  hold or control any  Franchise if such
         action or failure to act is  reasonably  likely to result in a Material
         Adverse Effect.

                  (g) Franchises.  Make or permit the termination of any 
         Franchise if such termination is reasonably likely to result in a 
         Material Adverse Effect.

         5.3.  Reporting  Requirements.  So long as any Loan or the Interim Note
shall remain unpaid or Nokia shall have any Commitment hereunder or shall be the
holder of all of the Rule 144A Notes  then  issued  and  outstanding,  APT will,
unless Nokia shall otherwise consent in writing, furnish to Nokia:

                  (a) Default  Notice.  Promptly  after APT becomes aware of the
         occurrence of any Default  continuing on the date of such statement,  a
         statement of the chief  financial  officer of APT setting forth details
         of such  Default and the action that APT has taken and proposes to take
         with respect thereto.



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24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



                  (b)  Quarterly  Financials.  As soon as  available  and in any
         event within 45 days after the end of each of the first three  quarters
         of each fiscal year,  the unaudited  consolidated  balance sheet of APT
         and its  Subsidiaries  as of the end of such  quarter and  consolidated
         statements of operations and cash flows of APT and its Subsidiaries for
         the period commencing at the end of the previous fiscal year and ending
         with the end of such quarter, setting forth in each case in comparative
         form the  corresponding  figures  for the  corresponding  period of the
         preceding  fiscal year,  all in  reasonable  detail and duly  certified
         (subject to year-end audit  adjustments) by the chief financial officer
         of APT as having been prepared in accordance with GAAP, together with a
         compliance certificate signed by the chief financial officer of APT.

                  (c) Annual  Financials.  As soon as available and in any event
         within 90 days after the end of each  fiscal year of APT, a copy of the
         annual  audit  report  for  such  year  for APT  and its  Subsidiaries,
         including  therein  the  consolidated  balance  sheet  of APT  and  its
         Subsidiaries  as of the  end  of  such  fiscal  year  and  consolidated
         statements of operations and cash flows of APT and its Subsidiaries for
         such fiscal year, in each case certified  without  qualification  as to
         any circumstance  which could reasonably be expected to have a material
         adverse effect on APT and its Subsidiaries  taken as a whole, by Arthur
         Andersen LLP or other  independent  public  accountants  of  recognized
         standing selected by APT and reasonably  acceptable to Nokia,  together
         with (i) a certificate of such accounting firm to Nokia stating that in
         the  course  of the  regular  audit  of the  business  of APT  and  its
         Subsidiaries,  which audit was  conducted  by such  accounting  firm in
         accordance with generally accepted auditing standards,  such accounting
         firm has  obtained  no  knowledge  that a Default has  occurred  and is
         continuing,  or if, in the opinion of such  accounting  firm, a Default
         has occurred and is  continuing,  a statement as to the nature  thereof
         and (ii) a compliance certificate signed by the chief financial officer
         of APT.

                  (d) ERISA Events.  Promptly  after any Loan Party knows or has
         reason to know that any ERISA  Event with  respect to any Loan Party or
         any of its ERISA  Affiliates  has occurred and is reasonably  likely to
         have a Material  Adverse  Effect,  a statement  of the chief  financial
         officer of APT describing such ERISA Event and the action, if any, that
         such Loan Party or such ERISA  Affiliate has taken and proposes to take
         with respect thereto.

                  (e) Plan  Terminations.  Promptly after receipt thereof by any
         Loan Party or any of its ERISA  Affiliates,  copies of each notice from
         the PBGC  pursuant to Section  4042 of ERISA  stating its  intention to
         terminate any Plan of any Loan Party or any of its ERISA  Affiliates or
         to  have a  trustee  appointed  to  administer  any  such  Plan if such
         termination or  appointment of a trustee would have a Material  Adverse
         Effect.



                                       35

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



                  (f) Plan Actuarial  Reports.  Promptly after receipt  thereof,
         copies of any actuarial report with respect to a Plan of any Loan Party
         or any of its ERISA  Affiliates,  which  indicates that such Plan has a
         "funded  current  liability  percentage"  (as such term is  defined  in
         Section 302(d)(8)(B) of ERISA) of less than or equal to 90 percent.

                  (g) Multiemployer Plan Notices. Promptly after receipt thereof
         by any Loan Party or any of its ERISA  Affiliates from the sponsor of a
         Multiemployer  Plan of any Loan  Party or any of its ERISA  Affiliates,
         copies of each  notice  concerning  (i) the  imposition  of  Withdrawal
         Liability by any such Multiemployer Plan, or (ii) the reorganization or
         termination,  within  the  meaning  of Title IV of  ERISA,  of any such
         Multiemployer  Plan if such imposition,  reorganization  or termination
         would have a Material Adverse Effect.

                  (h) Actuarial  Information.  With respect to each Plan of any
         Loan Party or any of its ERISA  Affiliates,  APT shall promptly furnish
         to Nokia a copy of  Schedule B  (Actuarial  Information)  to any annual
         report  (Form  5500  Series)  required  to be filed  with the  Internal
         Revenue Service from time to time.

                  (i) Litigation.  Promptly after the receipt by any Loan Party
         of service of process or other notice of commencement  thereof,  notice
         of all  actions,  suits,  investigations,  litigation  and  proceedings
         before any court or governmental department, commission, board, bureau,
         agency or  instrumentality,  domestic  or foreign,  affecting  any Loan
         Party or any of its  Subsidiaries  of the type described in Section 4.7
         other than rulemaking proceedings of general industry applicability.

                  (j) Securities  Reports.  Promptly after the sending or filing
         thereof,  copies  of all proxy  statements,  financial  statements  and
         reports that APT sends to its stockholders generally, and copies of all
         regular, periodic and special reports, and all registration statements,
         that APT files  with the  Securities  and  Exchange  Commission  or any
         governmental  authority that may be substituted  therefor,  or with any
         national securities exchange.

                  (k) Environmental  Conditions.  Promptly after the occurrence
         thereof,  notice of any  condition or occurrence on any property of any
         Loan Party or any of its  Subsidiaries  that  results in  noncompliance
         with, or liability under, any Environmental Law or Environmental Permit
         with  respect  to any  Loan  Party or any of its  Subsidiaries  that is
         reasonably likely to have a Material Adverse Effect.

                  (l) Other Information.  Following the occurrence and 
         during the continuance of an Event of Default, such other information 
         respecting the business, condition (financial or otherwise), 
         operations, performance, properties or prospects of


                                       36

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. 
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         any Loan Party or any of its Subsidiaries as Nokia may from time to 
         time reasonably request.


                                   ARTICLE VI

                                EVENTS OF DEFAULT

             6.1. Events of Default. If any of the following events
        ("Events of Default") shall occur and be continuing:

                  (a)  (i) APT shall fail to pay when due any  principal  of any
         Loan payable by it, (ii) APT shall fail to pay any interest on any Loan
         payable  by it or shall fail to make any other  payment  under any Loan
         Document  within 2 Business  Days after such  interest or other payment
         becomes  due and  payable,  or (iii) TDS shall fail to make any payment
         when due under the TDS  Guaranty  within 2  Business  Days  after  such
         payment becomes due and payable; or

                  (b) any  representation or warranty made by any Loan Party (or
         any of its  officers)  under or in  connection  with any Loan  Document
         shall prove to have been  incorrect in any material  respect when made;
         or

                  (c) APT shall fail to perform or observe any term, covenant or
         agreement contained in Section 5.2 or 5.3(a); or

                  (d) any Loan  Party  shall  fail to  perform  any other  term,
         covenant or agreement  contained in any Loan Document on its part to be
         performed or observed if such failure shall remain unremedied for * * *
         after written notice thereof shall have been given to APT by Nokia; or

                  (e) TDS shall fail to pay any principal of, premium or 
         interest on or any other amount payable in respect of any Debt that is 
         outstanding in an aggregate principal amount equal to or greater than 
         *    *    *                when the same becomes due and payable 
         (whether by scheduled maturity, required prepayment, acceleration, 
         demand or otherwise), and such failure shall continue after the
         applicable grace period, if any, specified in the agreement or 
         instrument relating to such Debt; or any default occurs under any 
         instrument under which there is at the time outstanding, or by which 
         there may be secured or evidenced, any such Debt that is outstanding in
         an aggregate principal amount equal to or greater than   *  *  *
         *   *   *               which results in acceleration (whether by 
         declaration or automatically) of such Debt; or any "Event of Default" 
         (as defined in the APT


                                       37

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CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         Indenture)  shall occur or; in the event that an APT  Indenture has not
         been  entered  into,  any  "Event of  Default"  (as  defined in the TDS
         Indenture) shall occur

                  (f) any Loan Party shall  generally  not pay its debts as such
         debts  become due, or shall admit in writing its  inability  to pay its
         debts generally,  or shall make a general assignment for the benefit of
         creditors; or any proceeding shall be instituted by or against any Loan
         Party  seeking to  adjudicate  it a bankrupt or  insolvent,  or seeking
         liquidation,  winding  up,  reorganization,   arrangement,  adjustment,
         protection,  relief,  or  composition  of it or its debts under any law
         relating  to  bankruptcy,  insolvency  or  reorganization  or relief of
         debtors, or seeking the entry of an order for relief or the appointment
         of a receiver,  trustee,  or other  similar  official for it or for any
         substantial  part  of its  property  and,  in  the  case  of  any  such
         proceeding  instituted  against it (but not  instituted  by it) that is
         being diligently  contested by it in good faith, either such proceeding
         shall  remain  undismissed  or unstayed for a period of * * * or any of
         the actions sought in such proceeding  (including,  without limitation,
         the entry of an order  for  relief  against,  or the  appointment  of a
         receiver,  trustee,  custodian or other similar official for, it or any
         substantial part of its property) shall occur; or any Loan Party or any
         of its Subsidiaries shall take any corporate action to authorize any of
         the actions set forth above in this subsection (f); or

                  (g) any judgment or order for the payment of money in excess 
         of   *  *  *               *  *  *            shall be rendered against
         TDS and there shall be any period of 30 days during which a stay of  
         enforcement  of such judgment or order,  by reason of a pending appeal 
         or otherwise,  shall not be in effect; or

                  (h) any provision of any Loan Document after delivery  thereof
         pursuant  to Article III shall for any reason  (other than  pursuant to
         the  terms  hereof or  thereof)  cease to be valid  and  binding  on or
         enforceable  against any Loan Party to it, or any such Loan Party shall
         so state in writing; or

                  (i) TDS  shall at all  times  maintain  beneficial  ownership,
         directly or indirectly through one or more Subsidiaries, of that number
         of shares of  Capital  Stock of APT (or any  entity  into  which APT is
         merged or  consolidated  in  accordance  with  Section 5.2 (a)) with at
         least a majority of the total  voting  power of APT  entitled  (without
         regard to the occurrence of any contingency) to vote in the election of
         directors (or persons performing similar functions); or

                  (j) any ERISA Event shall have occurred with respect to a Plan
         of any  Loan  Party  or  any  of  its  ERISA  Affiliates  and  the  sum
         (determined  as of the date of  occurrence  of such ERISA Event) of the
         Insufficiency  of such Plan and the  Insufficiency of any and all other
         Plans of the Loan  Parties and their ERISA  Affiliates  with respect to
         which an ERISA Event shall have occurred and then exist (or the


                                       38

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         liability of the Loan Parties and their ERISA Affiliates related to 
         such ERISA Event) exceeds            *  *  *                   or

                  (k) any Loan Party or any of its ERISA  Affiliates  shall have
         been notified by the sponsor of a Multiemployer  Plan of any Loan Party
         or  any  of its  ERISA  Affiliates  that  it  has  incurred  Withdrawal
         Liability to such Multiemployer Plan in an amount that, when aggregated
         with all other amounts  required to be paid to  Multiemployer  Plans by
         the Loan Parties and their ERISA  Affiliates  as  Withdrawal  Liability
         (determined as of the date of such notification), would have a Material
         Adverse Effect; or

                  (l) any Loan Party or any of its ERISA  Affiliates  shall have
         been notified by the sponsor of a Multiemployer  Plan of any Loan Party
         or any of its  ERISA  Affiliates  that  such  Multiemployer  Plan is in
         reorganization or is being  terminated,  within the meaning of Title IV
         of ERISA, and such  reorganization or termination would have a Material
         Adverse Effect;

then,  and in any such  event,  Nokia (i) may,  by notice  to APT,  declare  the
obligation  of Nokia to make Loans to be  terminated,  whereupon  the same shall
forthwith  terminate,  and (ii) may, by notice to APT, declare the Interim Note,
all interest  thereon and all other amounts payable under this Agreement and the
other Loan  Documents to be forthwith  due and  payable,  whereupon  the Interim
Note,  all such  interest and all such amounts shall become and be forthwith due
and payable, without presentment, demand, protest or further notice of any kind,
all of which are hereby  expressly  waived by APT,  and (iii) may,  by notice to
APT,  declare the Rule 144A Notes held by Nokia to be forthwith due and payable,
whereupon  such Rule 144A Notes shall become and be  forthwith  due and payable,
without presentment, demand, protest or further notice of any kind, all of which
are hereby expressly waived by APT; provided,  however,  that in the event of an
actual or deemed  entry of an order for  relief  with  respect to any Loan Party
under the Federal  Bankruptcy  Code,  (x) the  obligation of Nokia to make Loans
shall  automatically be terminated and (y) the Interim Note, the Rule 144A Notes
held by Nokia, all such interest and all such amounts shall automatically become
and be due and payable,  without presentment,  demand,  protest or any notice of
any kind, all of which are hereby  expressly waived by APT;  provided,  further,
that no remedies  under this  Section 6.1 may be  exercised  with respect to any
Rule  144A  Note  unless  Nokia  owns  all  Rule  144A  Notes  then  issued  and
outstanding.


                                   ARTICLE VII

                            ACCELERATION AND REMEDIES




                                       39

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



          7.1. Preservation of Rights. No delay or omission of Nokia to exercise
any right under the Loan Documents shall impair such right or be construed to be
a waiver of any  Default or an  acquiescence  therein,  and the making of a Loan
notwithstanding  the  existence of a Default or the  inability of APT to satisfy
the  conditions  precedent  to such Loan  shall  not  constitute  any  waiver or
acquiescence.  Any  single  or  partial  exercise  of any such  right  shall not
preclude other or further  exercise  thereof or the exercise of any other right,
and no  waiver,  amendment  or  other  variation  of the  terms,  conditions  or
provisions  of the Loan  Documents  whatsoever  shall be valid unless in writing
signed by Nokia and APT.


                                  ARTICLE VIII

                               GENERAL PROVISIONS


          8.1.    Survival of Representations.  All representations and 
warranties of APT contained in this Agreement shall survive delivery of the 
Interim Note and the making of the Loans herein contemplated.

          8.2.    Headings.  Section headings in this Agreement are for 
convenience of reference only, and shall not govern the interpretation of any of
the provisions of the Loan Documents.

         8.3.  Severability  of  Provisions.  Any provision in any Loan Document
that is held to be inoperative,  unenforceable,  or invalid in any  jurisdiction
shall,  as to that  jurisdiction,  be  inoperative,  unenforceable,  or  invalid
without  affecting  the  remaining   provisions  in  that  jurisdiction  or  the
operation,   enforceability,   or  validity  of  that  provision  in  any  other
jurisdiction,  and to this end the provisions of all Loan Documents are declared
to be severable.

         8.4.     Confidentiality.  With respect to Confidential Matters, the 
parties hereto agree, except as may be required to comply with any applicable 
law, regulation, or order of any governmental or other authority, that:

                  (a) Each will (i)  maintain,  or cause to be  maintained,  the
         confidentiality  of  Confidential  Matters  of the other  party and not
         disclose,  or permit to be disclosed,  any such  Confidential  Matters,
         unless  otherwise  authorized  in writing by the other party;  (ii) not
         use, or permit to be used,  any such  Confidential  Matters,  except in
         accordance with the performance of the Loan Documents;  (iii) restrict,
         or cause to be restricted,  disclosure of such Confidential  Matters to
         those officers, employees, Affiliates, and agents who need to know such
         Confidential Matters in the performance of work relating to the subject
         matter of this Agreement (it being understood that such




                                       40

<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         officers,  employees,  Affiliates,  and agents shall be informed of the
         confidential nature of such Confidential  Matters and shall be required
         to treat such Confidential  Matters  confidentially and not to use such
         Confidential  Matters other than for the purpose described above);  and
         (iv)  will  take  precautions  necessary  or  appropriate  to guard the
         confidentiality of such Confidential Matters.

                  (b) In the event that either party hereto becomes obligated to
         disclose  Confidential  Matters  pursuant to an order or request of any
         governmental or other  authority,  or in connection with any litigation
         or  arbitration,  such  party  shall seek a  protective  order or other
         appropriate   remedy   that  will  permit  such  party  to  avoid  such
         disclosures. In the event that such protective order or other remedy is
         not  obtained,  such  party  will  disclose  only that  portion  of the
         Confidential  Matters as it is obligated  to disclose  pursuant to such
         order,  and will use all reasonable  efforts to obtain  assurances that
         confidential  treatment will be accorded to any Confidential Matters so
         disclosed.  The party from which  disclosure is sought by any non-party
         shall immediately  inform the other party thereof and cooperate with it
         in  any   appropriate   effort  to   prevent   disclosure   or  protect
         confidentiality.

                  (c)  Each  party  shall  submit  to the  other  a copy  of all
         proposed sales materials,  press releases,  and other publicity matters
         ("Placement  Materials")  relating to performance  under this Agreement
         wherein the name, trademark, code, specification or service mark of the
         other party or its  Affiliates  is  mentioned  and neither  party shall
         publish or use such  Placement  Materials  without  the  other's  prior
         written approval. Approval or disapproval shall be declared as promptly
         as possible but in any event within five (5) working days of submission
         of the proposed copy. Approval may not be unreasonably withheld.

                  (d)The  provisions  of this Section 8.4 shall bind the parties
         so long as this  Agreement  is in  effect  and for a period  of two (2)
         years  after the last date on which  Nokia  holds any Rule 144A  Notes.
         NOTWITHSTANDING ANY OTHER PROVISION OF THIS AGREEMENT, either party may
         seek and recover direct damages for any violation of this Section 8.4.

         8.5.Giving  Notice.  Any notice required or permitted to be given under
this Agreement  shall be sent by United States mail,  telegraph,  telex,  FAX or
nationally  established overnight courier service,  addressed to the party to be
notified as follows or, as to each,  at such other address as designated by such
party in a written notice to the other party,

if to APT at:

         




                                       41

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.


         American Portable Telecom, Inc.
         8410 West Bryn Mawr Avenue
         Suite 1100
         Chicago, Illinois  60631
         Attention:  Chief Executive Officer




with a copy to:

         Telephone and Data Systems, Inc.
         30 North LaSalle Street
         Suite 4000
         Chicago, Illinois  60602
         Attention:  Chief Executive Officer

and a copy to:

         Sidley & Austin
         One First National Plaza
         Chicago, Illinois  60603
         Attention:  Michael G. Hron

and a copy to:

         Telephone and Data Systems, Inc.
         30 North LaSalle Street
         Suite 4000
         Chicago, Illinois  60602
         Attention:  Treasurer



if to Nokia at:

         Nokia Telecommunications Inc.
         7 Village Circle, Suite 100
         Westlake, Texas  76262
         Attention: President







                                       42

<PAGE>


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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.


with a copy to:


         Nokia Telecommunications Oy
         Upseerinkatu 1
         FIN-02600 Espoo
         Finland
         Attention: Group Legal Counsel

Such notices shall be deemed received (i) when received by the addressee if sent
via the  United  States  mail,  postage  prepaid,  (ii)  when  delivered  to the
appropriate  office or machine operator for  transmission,  charges prepaid,  if
sent by telegraph or telex (answerback confirmed in the case of telexes),  (iii)
when receipt  thereof by the  addressee is confirmed by telephone if sent by FAX
and (iv) one business day after  delivery to an overnight  courier  service,  if
sent by such  service,  in each case  addressed to APT or Nokia at the addresses
set forth on the signature pages hereof.

         8.6. Change of Address.  APT and Nokia may each change the address for
service of notice upon it by a notice in writing to the other parties hereto.

         8.7. Governing Law. This Agreement  shall be construed and enforced in
accordance with, and the rights of the parties shall be governed by, the laws of
the State of New York excluding the choice-of-law principles of the laws of such
state that would require the  application  of the laws of a  jurisdiction  other
than such state.

         8.8. Successors and Assigns. All  representations,  covenants and other
agreements  contained  in this  Agreement  by or on behalf of any of the parties
hereto shall bind and inure to the benefit of their  respective  successors  and
assigns  (including,  without  limitation,  any subsequent  holder of an Interim
Note),  whether so  expressed  or not.  Nokia agrees that it shall not assign or
otherwise  transfer  the  Interim  Note to any  Person  known  to  Nokia to be a
competitor of APT or TDS.

         8.9. Enforcement  Expenses.  APT agrees to pay on demand all costs and
expenses of Nokia (including but not limited to the reasonable fees and expenses
of counsel for Nokia)  incurred in connection  with the  enforcement of the Loan
Documents,  whether or not in any action,  suit or litigation or any bankruptcy,
insolvency or other similar proceeding  affecting creditors' rights generally or
any proceeding ancillary thereto or the preparation therefor, including, without
limitation,  in connection  with  protecting  or preserving  rights or interests
under  the  Loan  Documents,  negotiating  with any  Loan  Party  or with  other
creditors  of  any  Loan  Party   arising  out  of  any  Default  or  events  or
circumstances that may give rise to a Default, presenting claims in or otherwise
participating  in or  monitoring  any  bankruptcy,  insolvency  or other similar
proceeding  affecting  creditors'  rights generally or any proceeding  ancillary
thereto.





                                       43

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CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



         8.10. Purchase Agreement Prevails. In the event of any conflict between
the terms of this Agreement and the Purchase  Agreement (other than any conflict
of the Purchase  Agreement with the provisions of Section  6.1(d)  hereof),  the
provisions of the Purchase Agreement shall prevail.

         8.11. Counterparts.  This  Agreement  may be executed in any number of
counterparts,  all of which taken together shall  constitute one agreement,  and
any of the  parties  hereto may  execute  this  Agreement  by  signing  any such
counterpart.  This Agreement shall be effective when it has been executed by APT
and Nokia and the  conditions set forth in Section 3.1 shall have been satisfied
and shall  thereafter  be binding upon and inure to the benefit of APT and Nokia
and their respective successors and assigns.

         IN WITNESS  WHEREOF,  APT and Nokia have executed this  Agreement as of
the date first above written.

                         AMERICAN PORTABLE TELECOM, INC.

                         By: /s/  Ronald D. Webster
                             ______________________________

                         Its:     Authorized Representative
                             ______________________________

                          NOKIA TELECOMMUNICATIONS INC.

                         By: /s/  Jyrki Salow
                             ______________________________

                         Its:     President
                             _____________________________                    



                                       44

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SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



Exhibit and Schedule Index

Exhibit A                  Form of Interim Note

Schedule 4.5               Balance sheets of American Portable Telecom, Inc. and
                           Subsidiaries for March 31, 1996 and December 31, 1995
                           and statements of income, changes in common 
                           shareholders' equity and cash flows for the 
                           three month periods ended March 31, 1996 and 1995.

                           Balance sheets of American Portable Telecom, Inc. and
                           Subsidiaries  as of December  31, 1994 and 1995,  and
                           the   statements   of   income,   changes  in  common
                           shareholders'  equity  and cash flows for each of the
                           three years in the period ended December 31, 1995.

Schedule 4.13              PCS Licenses

Schedule 8.4               Balance sheets of Telephone and Data Systems, Inc. 
                           and Subsidiaries for March 31, 1996 and December 31, 
                           1995 and statements of income, changes in common 
                           shareholders' equity and cash flows for the three
                           month periods ended March 31, 1996 and 1995.

                           Balance  sheets of and  Telephone  and Data  Systems,
                           Inc.  Subsidiaries  as of December 31, 1994 and 1995,
                           and the  statements  of  income,  changes  in  common
                           shareholders'  equity  and cash flows for each of the
                           three years in the period ended December 31, 1995.

Pursuant to the rules of the Securities and Exchange Commission, these   
exhibits and schedules have been omittted and will be supplied supplementally to
the Commission upon request.





<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.



                                                                  Rider
                                         October 30, 1996




Nokia Telecommunications Inc.



Ladies and Gentlemen:

                  Reference is made to that certain Credit  Agreement dated June
19, 1996 (the  "Credit  Agreement")  between  American  Portable  Telecom,  Inc.
("APT") and Nokia  Telecommunications  Inc.  ("Nokia").  Capitalized  terms used
herein and not otherwise  defined  herein shall be used herein as defined in the
Credit  Agreement.  Reference is also made to the Series A Zero Coupon Notes due
2006 ("Notes") to be issued by APT as more fully  described in the  Confidential
Preliminary Offering Circular dated October 11, 1996.

                  This letter  agreement is intended to reflect the agreement of
APT  and  Nokia  to  modify  the   mechanism   for  pricing   the  Notes,   and,
correspondingly,   crediting  APT's   obligations  to  Nokia  under  the  Credit
Agreement, currently reflected in Section 2.6 of the Credit Agreement and in the
definition  of the Rule 144A Notes with respect to Tranche A contained  therein.
The intent of APT and Nokia is to permit the Notes to be issued with an original
issue  discount  resulting  in an  accretion  rate  which  may  differ  from the
accretion rate provided for in the Credit Agreement, but to provide for the same
economic  consequences  for APT and Nokia that are  currently  reflected  in the
Credit Agreement.

                  If the accretion  rate at which the Notes (the Rule 144A Notes
with  respect to Tranche A) are issued is greater than the  accretion  rate that
would  have been used  pursuant  to the Credit  Agreement,  then Nokia will pay,
concurrently with the closing,  to APT in cash an amount equal to the difference
between  the  present  value of all of the  prescribed  payments on the Notes as
issued  and the  present  value of all of the  payments  that  would  have  been
prescribed on such notes had the accretion  rate  currently  provided for in the
Credit  Agreement  been  used,  using a  discount  rate  equal to * * * plus the
interest rate per annum  applicable to 10 year U.S.  Treasury strips at the time
at which  the  price  of and  accretion  for the  Notes  is  determined.  If the
accretion  rate at which the Notes are  issued is less than the  accretion  rate
that would have been used pursuant to the Credit  Agreement,  then APT will pay,
concurrently with the closing, to Nokia in





<PAGE>


CONFIDENTIAL  MATERIAL  APPEARING  IN THIS  DOCUMENT  HAS BEEN OMITTED AND FILED
SEPARATELY  WITH THE SECURITIES AND EXCHANGE  COMMISSION IN ACCORDANCE WITH RULE
24B-2 PROMULGATED UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.
OMITTED INFORMATION HAS BEEN REPLACED WITH ASTERISKS.


cash an amount equal to the  difference  between the present value of all of the
prescribed  payments on the Notes as issued and the present  value of all of the
payments that would have been  prescribed  on such notes had the accretion  rate
currently  provided for in the Credit Agreement been used, using a discount rate
equal to * * * * * * plus the interest rate per annum applicable to 10 year U.S.
Treasury strips at the time at which the price of and accretion for the Notes is
determined.

                  APT and Nokia agree that comparable modifications will be made
with respect to the pricing of the Rule 144A Notes with respect to Tranche B and
the Rule 144A Notes with respect to Tranche C, as applicable.

                  For the  purposes of Section  2.2(b) of the Credit  Agreement,
the rate of interest  calculated pursuant to the second sentence of such Section
shall be that rate which would have been used  pursuant to such Section had this
letter agreement not been entered into.

                  If this letter accurately  reflects your  understanding of our
agreed modification to the Credit Agreement, please sign where indicated below.


                                        Very truly yours,

                                        AMERICAN PORTABLE TELECOM, INC.


                                        By: /s/  Ronald D. Webster
                                           _______________________________

Acknowledged and Agreed to:

NOKIA TELECOMMUNICATIONS INC.


By: /s/  Petri Castren
   ______________________________

     Director, Project Finance




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