Document:

<PAGE>

                                                                   EXHIBIT 10.28

                                                                  Execution Copy

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                           STOCK PURCHASE AGREEMENT

                                     among

                    AMERITECH MOBILE COMMUNICATIONS, INC.,

                        CYBERTEL FINANCIAL CORPORATION,

                      GTE CONSUMER SERVICES INCORPORATED

                                      and

                                GTE CORPORATION

                           Dated as of April 2, 1999

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                               TABLE OF CONTENTS

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                                    ARTICLE I

                                   Definitions

Section 1.1   Specific Definitions..........................................       2
Section 1.2   Other Terms...................................................      16
Section 1.3   Other Definitional Provisions.................................      16

                                   ARTICLE II

                           Purchase and Sale of Shares

Section 2.1   Purchase and Sale of Shares...................................      17
Section 2.2   Adjustment of the Base Purchase Price.........................      17
Section 2.3   Estimated Purchase Price......................................      17
Section 2.4   Closing; Delivery and Payment.................................      18
Section 2.5   Post-Closing Adjustment.......................................      18

                                   ARTICLE III

                    Representations and Warranties of Seller

Section 3.1   Organization and Authority of Seller and AMCI.................      21
Section 3.2   Organization and Qualification of the Companies...............      22
Section 3.3   Capitalization of the Companies...............................      22
Section 3.4   Subsidiaries of the Companies; Minority Interests.............      24
Section 3.5   Financial Statements..........................................      25
Section 3.6   Absence of Certain Changes or Events..........................      27
Section 3.7   Communications Licenses.......................................      27
Section 3.8   Litigation....................................................      28
Section 3.9   Compliance with Law and Licenses..............................      28
Section 3.10  Contracts.....................................................      28
Section 3.11  Consents and Approvals........................................      31
Section 3.12  Tax Matters...................................................      32
Section 3.13  Labor Matters.................................................      33
Section 3.14  Employee Benefits.............................................      33
Section 3.15  Environmental Matters.........................................      34
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Section 3.16  Property and Leases...........................................      35
Section 3.17  Accounts Receivable; Debt.....................................      36
Section 3.18  Affiliate Transactions........................................      36
Section 3.19  Year 2000 Compliance..........................................      36
Section 3.20  Ability to Conduct Business...................................      37
Section 3.21  Brokers and Finders...........................................      37
Section 3.22  Service Marks.................................................      38
Section 3.23  No Other Representations or Warranties........................      38

                                   ARTICLE IV

                     Representations and Warranties of Buyer

Section 4.1   Organization and Authority of Buyer and Buyer Parent..........      38
Section 4.2   Consents and Approvals........................................      39
Section 4.3   Brokers and Finders...........................................      40
Section 4.4   Financial Capability..........................................      40
Section 4.5   Securities Act................................................      40
Section 4.6   Litigation....................................................      40
Section 4.7   Investigation by Buyer........................................      41
Section 4.8   Governmental Consents.........................................      41
Section 4.9   No Other Representations or Warranties........................      41

                                    ARTICLE V

                                   Tax Matters

Section 5.1   Liability for Taxes and Related Matters.......................      41
Section 5.2   Transfer Taxes................................................      46
Section 5.3   Information to be Provided by Buyer...........................      46
Section 5.4   Assistance and Cooperation....................................      47
Section 5.5   Miscellaneous.................................................      47
Section 5.6   Section 338(h)(10); Alternative Transaction Structure.........      48
Section 5.7   Survival of Obligations.......................................      49
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                                   ARTICLE VI

                              Certain Covenants and
                         Agreements of Seller and Buyer

Section 6.1   Access and Information........................................      49
Section 6.2   Conduct of Business...........................................      52
Section 6.3   Registrations, Filings and Consents...........................      55
Section 6.4   Employee Benefit Plans........................................      58
Section 6.5   Retention of Books and Records................................      61
Section 6.6   Consent Decree................................................      62
Section 6.7   Company Assets................................................      62
Section 6.8   Intellectual Property.........................................      62
Section 6.9   Resignations..................................................      62
Section 6.10  Partnership Agreements........................................      63
Section 6.11  Litigation....................................................      63
Section 6.12  Certain Transactions..........................................      64
Section 6.13  Contracts.....................................................      64
Section 6.14  Transition Services...........................................      66
Section 6.15  Roaming Agreement.............................................      66
Section 6.16  Non-Solicitation..............................................      66
Section 6.17  Intercompany Obligations......................................      68
Section 6.18  Customer Communications and Billing...........................      68
Section 6.19  Alternative Transaction Structure.............................      69
Section 6.20  Employee Customers............................................      70
Section 6.21  Year 2000 Testing.............................................      70
Section 6.22  Transition Committees.........................................      70
Section 6.23  Prepaid Accounts..............................................      70
Section 6.24  Transition Services Revisions.................................      71
Section 6.25  Restriction on Use............................................      71
Section 6.26  License.......................................................      72
Section 6.27  Expenditures..................................................      73
Section 6.28  System Identification Number..................................      73
Section 6.29  Partnership Interests.........................................      74
Section 6.30  License for Certain Proprietary Software......................      74
Section 6.31  Further Assurances............................................      75

                                   ARTICLE VII

                              Conditions to Closing

Section 7.1   Conditions to Each Party's Obligation to
                Effect the Transaction......................................      75
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Section 7.2   Conditions to Obligations of Buyer............................      76
Section 7.3   Conditions to Obligations of Seller...........................      77

                                  ARTICLE VIII

                                   Termination

Section 8.1   Termination...................................................      78
Section 8.2   Effect of Termination.........................................      79

                                   ARTICLE IX

                          Survival And Indemnification

Section 9.1   Survival of Representations, Warranties, Covenants
                and Agreements..............................................      79
Section 9.2   Indemnification by Buyer......................................      81
Section 9.3   Indemnification by Seller.....................................      81
Section 9.4   Indemnification as Sole Remedy................................      83
Section 9.5   Method of Asserting Claims, Etc...............................      83
Section 9.6   Calculation of Losses.........................................      86
Section 9.7   Assignment of Claims..........................................      87
Section 9.8   Overlapping Provisions........................................      87

                                    ARTICLE X

                                  Miscellaneous

Section 10.1  Amendment and Waiver..........................................      88
Section 10.2  Expenses......................................................      88
Section 10.3  Public Disclosure.............................................      88
Section 10.4  Assignment....................................................      88
Section 10.5  Entire Agreement..............................................      89
Section 10.6  Fulfillment of Obligations....................................      89
Section 10.7  Parties in Interest; No Third Party Beneficiaries.............      89
Section 10.8  Guarantee.....................................................      89
Section 10.9  Counterparts..................................................      90
Section 10.10 Section Headings..............................................      90
Section 10.11 Notices.......................................................      90
SECTION 10.12 GOVERNING LAW; SUBMISSION TO JURISDICTION; SELECTION OF FORUM.      92
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SECTION 10.13 WAIVER OF JURY TRIAL..........................................      92
Section 10.14 Certain Constructions.........................................      92
Section 10.15 Severability..................................................      93

                           SELLER DISCLOSURE SCHEDULES

Schedule 1.1               Accounting Principles
Schedule 3.2               Organization and Qualification of the Companies
Schedule 3.3(a)            Capitalization of Cybertel
Schedule 3.4(a)            Subsidiaries of Cybertel
Schedule 3.4(b)            Subsidiaries of GSAA
Schedule 3.4(c)            Other Equity Interests
Schedule 3.5(a)            Cybertel Financial Statements
Schedule 3.5(b)            GSAA Financial Statements
Schedule 3.5(c)            Cybertel Cellular Financial Statements
Schedule 3.5(e)            Companies Pro Forma Balance Sheets
Schedule 3.5(f)            Cybertel RSA Pro Forma Balance Sheet
Schedule 3.5(g)            Cybertel Cellular Expenditure Budgets
Schedule 3.5(h)            Cybertel RSA Pro Forma Expenditure Budgets
Schedule 3.6               Absence of Certain Changes or Events
Schedule 3.7               Communications Licenses
Schedule 3.8               Litigation
Schedule 3.10(a)           Contracts
Schedule 3.10(b)           Contracts
Schedule 3.10(c)           Conflicts
Schedule 3.10(d)           Seller and Contracts
Schedule 3.11              Seller Consents and Approvals
Schedule 3.12              Tax Matters
Schedule 3.14(a)           Benefit Plans
Schedule 3.14(d)           Retiree Health and Life Benefits
Schedule 3.14(e)           Severance
Schedule 3.15              Environmental Matters
Schedule 3.16(a)           Owned and Leased Real Property
Schedule 3.18              Affiliate Transactions
Schedule 3.20              Services and Assets
Schedule 3.22              Service Marks
Schedule 6.2               Conduct of Business
Schedule 6.7               Asset Transfers
Schedule 6.13              Certain Contracts
Schedule 6.16              National/Large Accounts
Schedule 6.19(a)           Alternative Transaction
Schedule 6.19(b)           Step Up Tax Loss
Schedule 6.30              Proprietary Software
Schedule 9.3               Certain Litigation
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                           BUYER DISCLOSURE SCHEDULES

Schedule 4.2               Buyer Consents and Approvals

                                    EXHIBITS

Exhibit A                  Form of Transition Services Agreement
Exhibit B                  Form of Roaming Agreement
Exhibit C                  Form of Trademark License Agreement
Exhibit D-1                Form of Opinion from Seller's Inside Counsel
Exhibit D-2                Form of Opinion from Skadden, Arps,
                            Slate, Meagher & Flom LLP
Exhibit E                  Form of Opinion from Buyer's Inside Counsel
Exhibit F                  EBITDA Subscriber Amount

                                     -vi-
<PAGE>

          STOCK PURCHASE AGREEMENT (the "Agreement"), dated as of April 2, 1999,
among Cybertel Financial Corporation, a Delaware corporation ("Seller"),
Ameritech Mobile Communications Incorporated, a Delaware corporation ("AMCI"),
GTE Consumer Services Incorporated, a Delaware corporation ("Buyer") and solely
for purposes of Section 10.8, GTE Corporation, a New York corporation ("Buyer
Parent").

                             W I T N E S S E T H:

          WHEREAS, Ameritech Corporation, a Delaware corporation ("Parent"), SBC
Communications Inc., a Delaware corporation ("SBC") and SBC Delaware, Inc., a
Delaware corporation ("SBC Sub") have entered into an Agreement and Plan of
Merger, dated as of May 10, 1998 (as such agreement may be amended from time to
time, the "Merger Agreement"), contemplating the merger (the "Merger") of SBC
Sub with and into Parent;

          WHEREAS, AMCI is a wholly owned Subsidiary of Parent and Seller is a
wholly owned subsidiary of AMCI;

          WHEREAS, Seller owns (i) all of the issued and outstanding shares of
common stock, without par value (the "Cybertel Shares"), of Cybertel
Corporation, an Illinois corporation ("Cybertel"); and (ii) all of the issued
and outstanding shares of common stock, $1.00 par value per share (the "GSAA
Shares"), of GSAA, Inc., a Delaware corporation ("GSAA" and, together with
Cybertel, the "Companies");

          WHEREAS, the transactions contemplated by this agreement are necessary
for SBC, following the consummation of the Merger, to be in compliance with the
Commercial Mobile Radio Service spectrum aggregation limit restrictions
contained in 47 C.F.R. Section 20.6 and the Cellular Cross Ownership limitations
contained in 47 C.F.R. Section 22.942;

          WHEREAS, in the absence of compliance with such federal regulations,
the Merger could not be consummated; and

          WHEREAS, subject to the closing of the Merger, Seller desires to sell
and transfer to Buyer, and Buyer desires to purchase from Seller, all of the
issued and
<PAGE>

outstanding shares of capital stock of Cybertel and GSAA, as more specifically
provided herein;

          NOW, THEREFORE, in consideration of the mutual covenants and
undertakings contained herein, and subject to and on the terms and conditions
herein set forth, the parties hereto agree as follows:

                                   ARTICLE I

                                  Definitions

          Section 1.1 Specific Definitions. As used in this Agreement, the
following terms shall have the meanings set forth or referenced below:

          "Affiliate", as applied to any Person, means any other Person directly
or indirectly Controlling, Controlled by or under common Control with such
Person.

          "Agreement" shall mean, as the context requires, this Agreement and
all Schedules and Exhibits hereto, as amended, supplemented or otherwise
modified from time to time in accordance with the terms hereof.

          "Alternative Transaction" shall have the meaning set forth in Section
6.19.

          "AMCI" shall have the meaning set forth in the Preamble.

          "Ancillary Agreements" shall mean the Transition Services Agreement
and the Roaming Agreement.

          "Applicable Rate" shall mean the one-month LIBOR rate as published in
the Wall Street Journal on the Closing Date.

          "Base Purchase Price" shall have the meaning set forth in Section 2.1.

          "Benefit Plans" shall have the meaning set forth in Section 3.14(a).

          "Business" shall mean the business of (a) operating Commercial Mobile
Radio Service, including, without

                                      -2-
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limitation, the business of operating and maintaining equipment necessary to
operate the systems providing such service, and (b) marketing, selling and
providing Telecommunications Service and Information Service via such systems as
well as products (including Customer Premises Equipment) and services that are
ancillary to marketing, selling and providing such Telecommunications Service
and Information Service via such systems, as conducted on the date hereof by the
Companies and their Subsidiaries in the Missouri Market, but shall exclude the
businesses of providing, reselling, operating or managing paging services,
wireline telephony or transport services, including wireline long-distance
services and any fixed wireless services.

          "Business Customers" shall mean those customers of the Business who
acquire services pursuant to business volume price plans.

          "Business Day" shall mean any day other than a Saturday, a Sunday or a
day on which banks in the City of New York are authorized or obligated by law or
executive order to close.

          "Buyer" shall have the meaning set forth in the Preamble.

          "Buyer Disclosure Schedule" shall have the meaning set forth in the
Preamble of Article IV.

          "Buyer Indemnified Parties" shall have the meaning set forth in
Section 9.3(a).

          "Buyer Parent" shall have the meaning set forth in the Preamble.

          "Buyer Savings Plan" shall have the meaning set forth in Section
6.4(c).

          "Calculation" shall have the meaning set forth in Section 2.5(a).

          "Cellular Authorizations" shall have the meaning set forth in Section
3.11.

          "Central Illinois Market" shall have the meaning set forth in the
Chicago and Central Illinois Stock Purchase Agreement.

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          "Certificate of Convenience and Necessity" shall mean a Certificate of
Public Convenience and Necessity issued by the ICC.

          "Chicago and Central Illinois Stock Purchase Agreement" shall mean the
stock purchase agreement dated as of the date hereof, by and among AMCI, Buyer
and Buyer Parent.

          "Chicago and Central Illinois Transaction" shall mean the purchase and
sale to be effected in accordance with the terms of the Chicago and Central
Illinois Stock Purchase Agreement.

          "Chicago Market" shall have the meaning set forth in the Chicago and
Central Illinois Stock Purchase Agreement.

          "Chosen Courts" shall have the meaning set forth in Section 10.12.

          "Claim Notice" shall have the meaning set forth in Section 9.5.

          "Closing" shall have the meaning set forth in Section 2.4(a).

          "Closing Date" shall have the meaning set forth in Section 2.4(a).

          "Closing Long Term Liabilities" shall mean the long term liabilities
of the Companies and their Subsidiaries on a combined basis as of the Closing
Date calculated in a manner consistent with the accounting policies, methods,
principles and practices specified on Schedule 1.1 and if not specified thereon,
used in the preparation of the Companies Financial Statements.

          "Closing Statement" shall have the meaning set forth in Section
2.5(a).

          "Closing Working Capital" shall mean the sum of the Cybertel Cellular
Working Capital and the Cybertel RSA Working Capital, in each case as of the
Closing Date determined in accordance with the provisions of Section 2.5.

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          "Code" shall mean the Internal Revenue Code of 1986, as amended.

          "Commercial Mobile Radio Service" shall have the meaning set forth in
47 U.S.C. Section 332(d).

          "Communications Act" shall mean the Communications Act of 1934, as
amended, and the rules and regulations promulgated thereunder.

          "Communications Licenses" shall mean all licenses required to conduct
the Business under applicable requirements of the FCC or state public utilities
commissions, including, without limitation, licenses from the FCC, Certificates
of Convenience and Necessity.

          "Companies" shall have the meaning set forth in the Recitals.

          "Companies Financial Statements" shall have the meaning set forth in
Section 3.5(b).

          "Companies Pro Forma Balance Sheets" shall have the meaning set forth
in Section 3.5(e).

          "Confidential Information Memorandum" shall mean that Confidential
Information Memorandum dated January 1999 relating to, among other Persons, the
Companies and their Subsidiaries and sent to Buyer.

          "Confidentiality Agreement" shall have the meaning set forth in
Section 6.1(c).

          "Consent Decree" shall mean the consent decree related to the Merger,
between the DOJ, on the one hand, and SBC and Parent, on the other hand, filed
with the United States District Court for the District of Columbia in the case
entitled United States v. SBC and Parent on March 23, 1999.

          "Contracts" shall mean any agreement, lease, contract, note, mortgage,
indenture, arrangement or other obligation.

          "Control" shall mean, and "controlled" and "controlling" shall refer
to the possession, direct or indirect, of the power to direct or cause the
direction of

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the management and policies of a Person, whether through the ownership of voting
securities, by contract, or otherwise.

          "CPA Firm" shall have the meaning set forth in Section 2.5(c).

          "Customer Premises Equipment" shall have the meaning set forth in 47
U.S.C.ss.3(14).

          "Cybertel" shall have the meaning set forth in the Recitals.

          "Cybertel Cellular" shall mean Cybertel Cellular Telephone Company, a
Missouri general partnership.

          "Cybertel Cellular Expenditure Budgets" shall have the meaning set
forth in Section 3.5(g).

          "Cybertel Cellular Financial Statements" shall have the meaning set
forth in Section 3.5(c).

          "Cybertel Cellular Required Expenditure Amount" shall mean the sum of
the amounts of capital expenditures set forth in the Cybertel Cellular
Expenditure Budgets for the months in the period from the date hereof through
the Closing Date with the amount included in such sum for any partial months in
such period pro rated based on the number of days elapsed in such period during
such month and the total number of days in such month.

          "Cybertel Cellular Working Capital" shall mean (A) (i) the current
assets (including cash and cash equivalents) of Cybertel Cellular, minus (ii)
the current liabilities of Cybertel Cellular, clauses (i) and (ii) being
calculated from time to time in a manner consistent with the accounting
policies, methods, principles and practices specified on Schedule 1.1 and, if
not specified thereon, used in the preparation of the Cybertel Cellular
Financial Statements, plus (iii) the Excess Cybertel Cellular Investment Amount,
if any, minus (iv) the Shortfall Cybertel Cellular Investment Amount, if any,
multiplied by (B) 0.85.

          "Cybertel Financial Statements" shall have the meaning set forth in
Section 3.5(a).

          "Cybertel Purchase Price" shall have the meaning set forth in Section
2.1.

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          "Cybertel RSA" shall mean Cybertel RSA Cellular Limited Partnership, a
Delaware limited partnership.

          "Cybertel RSA Pro Forma Balance Sheet" shall have the meaning set
forth in Section 3.5(f).

          "Cybertel RSA Pro Forma Expenditure Budgets" shall have the meaning
set forth in Section 3.5(h).

          "Cybertel RSA Required Expenditure Amount" shall mean the sum of the
amounts of capital expenditures set forth in the Cybertel RSA Pro Forma
Expenditure Budgets for the months in the period from the date hereof through
the Closing Date with the amount included in such sum for any partial months in
such period pro rated based on the number of days elapsed in such period during
such month and the total number of days in such month.

          "Cybertel RSA Working Capital" shall mean (i) the current assets
(including cash and cash equivalents) of Cybertel RSA minus (ii) the current
liabilities of Cybertel RSA, clauses (i) and (ii) being calculated from time to
time in a manner consistent with the accounting policies, methods, principles
and practices specified on Schedule 1.1 and, if not specified thereon, used in
the preparation of the Cybertel Financial Statements, plus (iii) the Excess
Cybertel RSA Investment Amount, if any, minus (iv) the Shortfall Cybertel RSA
Investment Amount, if any.

          "Cybertel Shares" shall have the meaning set forth in the Recitals.

          "Deductible" shall have the meaning set forth in Section 9.1.

          "DOJ" shall mean the United States Department of Justice.

          "EBITDA Subscriber Amount" shall have the meaning set forth on Exhibit
F.

          "Encumbrances" shall mean liens, pledges, security interests or other
encumbrances.

          "Environmental Law" means any law, regulation, code, ordinance,
requirement of common law, license, permit, approval, authorization, notice,
order, judgment, decree or

                                      -7-
<PAGE>

injunction, and any written publicly available judicial or administrative
interpretation thereof, of the United States, any interstate authority, any
State or political subdivision thereof (including any court thereof and any
Governmental Entity) regulating the protection of the environment (including
air, water, soil and natural resources), occupational safety as it relates to
Hazardous Substance exposure, or the use, storage, handling, release, treatment
or disposal of any Hazardous Substance as in effect on the date hereof.

          "ERISA" shall have the meaning set forth in Section 3.14(b).

          "ERISA Affiliate" shall have the meaning set forth in Section 3.14(c).

          "Estimated Closing Adjustment" shall have the meaning set forth in
Section 2.3.

          "Estimated Purchase Price" shall mean (i) the Base Purchase Price plus
(ii) the amount (positive or negative) of the Estimated Closing Adjustment.

          "Excess Cybertel Cellular Investment Amount" shall mean the excess, if
any, of (x) the aggregate of the actual capital expenditures of Cybertel
Cellular from the date hereof through the Closing Date over (y) 105% of the
Cybertel Cellular Required Expenditure Amount, calculated in accordance with
GAAP applied on a basis consistent with those policies used in the Cybertel
Cellular Pro Forma Expenditure Budgets and in accordance with the accounting
policies, methods, principles, and practices used in the preparation of the
Cybertel Cellular Pro Forma Expenditure Budgets; provided, that capital
expenditures in excess of 105% of the Cybertel Cellular Required Expenditure
Amount shall be included in this calculation only to the extent they have been
previously approved in writing by Buyer.

          "Excess Cybertel RSA Investment Amount" shall mean the excess, if any,
of (x) the aggregate of the actual capital expenditures of Cybertel RSA from the
date hereof through the Closing Date over (y) 105% of the Cybertel RSA Required
Expenditure Amount calculated in accordance with GAAP applied on a basis
consistent with those policies used in the Cybertel RSA Pro Forma Expenditure
Budgets and in accordance with the accounting policies, methods, principles

                                      -8-
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and practices used in the preparation of the Cybertel RSA Pro Forma Expenditure
Budgets; provided, that capital expenditures in excess of 105% of the Cybertel
Cellular Required Expenditure Amount shall be included in this calculation only
to the extent they have been previously approved in writing by Buyer.

          "Excluded Business" shall mean the portion of business of the
Companies or their Subsidiaries being transferred by the Companies or their
Subsidiaries to Seller or an Affiliate of Seller (other than the Companies and
its Subsidiaries) as contemplated by the Restructuring.

          "Extended Termination Date" shall have the meaning set forth in
Section 8.1(d).

          "FCC" shall mean the Federal Communications Commission.

          "Financial Statements" shall have the meaning set forth in Section
3.5(c).

          "GAAP" shall mean United States generally accepted accounting
principles.

          "Governmental Consents" shall have the meaning set forth in Section
7.1(a).

          "Governmental Entity" shall mean any governmental or regulatory
authority, agency, commission, body, court or other governmental entity of the
United States of America or any State or political subdivision thereof.

          "Government Regulatory Entity" shall have the meaning set forth in
Section 6.3(d).

          "GSAA" shall have the meaning set forth in the Recitals.

          "GSAA Financial Statements" shall have the meaning set forth in
Section 3.5(b).

          "GSAA Purchase Price" shall have the meaning set forth in Section 2.1.

          "GSAA Shares" shall have the meaning set forth in the Recitals.

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<PAGE>

          "Hazardous Substance" shall mean any substance listed, defined,
designated or classified as hazardous, toxic or as a pollutant, contaminant,
solid waste or radioactive waste under any applicable Environmental Law,
including petroleum, petroleum products and any derivative or by-products
thereof, polychlorinated biphenyls, asbestos and radioactive materials.

          "HSR Act" shall mean the Hart-Scott-Rodino Antitrust Improvements Act
of 1976, as amended.

          "ICC" shall mean the Illinois Commerce Commission.

          "Indemnified Party" shall have the meaning set forth in Section
9.3(a).

          "Indemnifying Party" shall have the meaning set forth in Section 9.5.

          "Information Service" shall have the meaning set forth in 47 U.S.C.
ss.3(20).

          "Initial Period" shall have the meaning set forth in Section 6.25(b).

          "IRS" shall mean the Internal Revenue Service.

          "Knowledge", with respect to Seller, shall mean the actual knowledge
of any of the following employees of either AMCI or Seller: Walter S. Catlow,
Don P. Crockford, Jay Ellison, Bennett P. Gamel, Barbara Goworowski, Nancy G.
Howe, Geoffrey M. Knoezer, Anthony R. Muscato, Dennis L. Myers, Paul G. Osland,
Raymond H. Panza, Pamela L. Rashid, and Linda Wokoun, and, with respect to
Buyer, shall mean the actual knowledge of all directors and executive officers
of Buyer, in each case, arising without the conduct by any such Person of any
independent investigation with respect to the facts or matters specified.

          "Law" shall have the meaning set forth in Section 3.1.

          "Licenses" shall mean all permits, licenses, waivers, and
authorizations other than Communications Licenses from any Governmental Entity.

                                      -10-
<PAGE>

          "Limit" shall have the meaning set forth in Section 9.1.

          "Losses" shall have the meaning set forth in Section 9.2(a).

          "Material Adverse Effect" shall mean an effect that is materially
adverse to the business, operations, assets, liabilities or financial condition
of the Companies and their respective Subsidiaries, taken as a whole, and for
these purposes, shall include aspects of the Business to be transferred to or
assumed by Buyer, the Companies or their Subsidiaries on or before the Closing
Date, but shall exclude any change or development after the date of this
Agreement resulting from (i) any change in Law or interpretations thereof, (ii)
changes in interest rates, general economic conditions or changes in the general
economic condition of the Missouri Market, (iii) changes affecting the
Commercial Mobile Radio Service industry generally or (iv) the entry into this
Agreement or the performance of a party's obligations hereunder (other than
changes relating to or resulting from provisions in Contracts breached by,
requiring consents in connection with or the contractual rights under which are
otherwise adversely impacted by, this Agreement or the consummation of the
transactions contemplated hereby, or effects relating to or resulting from
provisions in any License or Communications License or any Law governing such
License or Communications License breached by, requiring consents in connection
with or otherwise adversely impacted by this Agreement or the consummation of
the transactions contemplated hereby).

          "Merger" shall have the meaning set forth in the Recitals.

          "Merger Agreement" shall have the meaning set forth in the Recitals.

          "Missouri Market" shall mean the Metropolitan Statistical Area of St.
Louis, Missouri, and the Rural Service Areas of Callaway, Missouri (Missouri RSA
#8), Maries, Missouri (Missouri RSA #12), Perry, Missouri (Missouri RSA #18) and
Stoddard, Missouri (Missouri RSA #19) taken together.

          "National/Large Accounts" shall mean those customers of the Business
set forth on Schedule 6.16, with

                                      -11-
<PAGE>

those customers noted with an asterisk on such schedule being "In Market
National/Large Accounts."

          "New Marks" shall have the meaning set forth in Section 6.26.

          "Notice Period" shall have the meaning set forth in Section 9.5.

          "Order" shall have the meaning set forth in Section 7.1(b).

          "Parent" shall have the meaning set forth in the Recitals.

          "Pension Plan" shall have the meaning set forth in Section 3.14(b).

          "Permitted Combination" shall have the meaning set forth in Section
6.26(b).

          "Permitted Shares Transferee" shall have the meaning set forth in
Section 6.6.

          "Person" shall mean any individual, corporation, partnership, limited
liability company, firm, joint venture, association, joint-stock company, trust,
unincorporated organization, governmental or regulatory body or other entity.

          "Post-Closing Adjustment" shall have the meaning set forth in Section
2.5(d).

          "Potential Contributor" shall have the meaning set forth on Section
9.7.

          "Promotional Items" shall have the meaning set forth in Section
9.5(c).

          "Purchase Price" shall have the meaning set forth in Section 2.1.

          "Qualifying Customer Litigation" shall have the meaning set forth in
Section 9.3(b).

          "Resolution Period" shall have the meaning set forth in Section
2.5(b).

                                      -12-
<PAGE>

          "Resolved Items" shall have the meaning set forth in Section 2.5(b).

          "Restructuring" shall mean the transactions pursuant to which the
business of Cybertel is restructured by transferring from the Companies or their
Subsidiaries to Seller or its Affiliates (other than Companies or their
Subsidiaries) (i) each of the permits, licenses, waivers and authorizations from
any Governmental Entity in the name of Seller or its Affiliates that are
required to conduct Commercial Mobile Radio Service operations in the Columbia,
Missouri Metropolitan Statistical Area, the Rural Service Areas of Saline
(Missouri RSA #7), Benton (Missouri RSA #10), Lake of the Ozarks (Missouri RSA
#11) and in Kauai, Hawaii (together, the "Excluded Markets"), (ii) all cell site
towers and equipment attached thereto owned or leased by Cybertel or its
Subsidiaries that are not located in the Missouri Market, provided that (a) such
cell site towers and equipment attached thereto are not primarily related to the
Business or reflected on the Companies Pro Forma Balance Sheets as assets to be
owned or leased by the Companies and their Subsidiaries following the
transactions reflected thereon, and (b) such transfers of cell site towers from
the Companies and their Subsidiaries would not, in any individual case or in the
aggregate, adversely affect the Business in any material respect, and (iii) all
other assets (whether tangible or intangible) which are used exclusively in the
Excluded Markets or are not used in any material respect in the Business,
together with all liabilities related to all such transferred assets.

          "Roaming Agreement" shall mean the Roaming Agreement between AMCI and
Buyer in the form of Exhibit B to be entered into on the Closing Date.

          "SBC" shall have the meaning set forth in the Recitals.

          "SBC Sub" shall have the meaning set forth in the Recitals.

          "Section 338(h)(10) Election" shall have the meaning set forth in
Section 5.6(a).

          "Securities Act" shall mean the Securities Act of 1933, as amended.

                                      -13-
<PAGE>

          "Seller" shall have the meaning set forth in the Preamble.

          "Seller's Accrual" shall have the meaning set forth in Section 6.4(d).

          "Seller Disclosure Schedule" shall have the meaning set forth in the
preamble to Article III.

          "Seller Indemnified Parties" shall have the meaning set forth in
Section 9.2(a).

          "Seller Savings Plan" shall have the meaning set forth in Section
6.4(c).

          "Service Marks" shall have the meaning set forth in Section 3.22.

          "Shares" shall mean the Cybertel Shares and the GSAA Shares taken
together.

          "Shortfall Cybertel Cellular Investment Amount" shall mean the excess,
if any, of (x) 95% of the Cybertel Cellular Required Expenditure Amount over (y)
the aggregate of the actual capital expenditures made by Cybertel Cellular from
the date hereof through the Closing Date, calculated in accordance with the
accounting policies, methods, principles and practices used in the preparation
of the Cybertel Cellular Pro Forma Expenditures Budgets.

          "Shortfall Cybertel RSA Investment Amount" shall mean the excess, if
any, of (x) 95% of the Cybertel RSA Required Expenditure Amount over (y) the
aggregate of the actual capital expenditures made by Cybertel RSA on a
consolidated basis from the date hereof through the Closing Date, calculated in
accordance with the accounting policies, methods, principles and practices used
in the preparation of the Cybertel RSA Pro Forma Expenditure Budgets.

          "SID" shall have the meaning set forth in Section 6.28.

          "SID Change" shall have the meaning set forth in Section 6.28.

                                      -14-
<PAGE>

          "Step Up" shall have the meaning set forth in Section 6.19.

          "Step Up Tax Loss" shall have the meaning set forth in Section 6.19.

          "Subsequent Period" shall have the meaning set forth in Section
6.25(c).

          "Subsidiary" shall mean, as to any Person, any Person (i) of which
such Person directly or indirectly owns, securities or other equity interests
representing fifty percent (50%) or more of the aggregate voting power, (ii) of
which a Person possesses fifty percent (50%) or more of the right to elect
directors or Persons holding similar positions or (iii) which such Person
Controls directly or indirectly through one or more intermediaries, it being
understood that, subject to Section 10.14 with respect to Cybertel, the term
Subsidiary shall be deemed to include Cybertel RSA.

          "Systems" shall have the meaning set forth in Section 3.19.

          "Tax Package" shall have the meaning set forth in Section 5.3.

          "Tax Returns" shall mean any and all federal, state, local or foreign
returns, reports, claims for refund, information returns, statements or
declarations relating to Taxes.

          "Taxes" shall mean any and all taxes, fees, levies, duties, tariffs,
imports and other charges of any kind imposed by any taxing authority, including
but not limited to any and all federal, state, local or foreign income, gross
receipts, windfall or excess profits, severance, property, production, sales,
use, value added, license, stamp, excise, franchise, employment, withholding or
similar taxes, together with any interest, additions or penalties with respect
thereto and any interest in respect of such additions or penalties.

          "Telecommunications Service" shall have the meaning set forth in 47
U.S.C. ss.3(46).

                                      -15-
<PAGE>

          "Termination Date" shall have the meaning set forth in Section 8.1(d).

          "Trademark License Agreement" shall mean the Trademark License
Agreement to be entered into between Parent and Buyer in the form of Exhibit C.

          "Trademarks" shall have the meaning set forth in Section 6.25.

          "Transfer Taxes" shall have the meaning set forth in Section 5.2.

          "Transferred Employees" shall have the meaning set forth in Section
6.4(a).

          "Transition Services Agreement" shall mean the Transition Services
Agreement between AMCI and Buyer in the form of Exhibit A to be entered into on
the Closing Date.

          "Unresolved Items" shall have the meaning set forth in Section 2.5(c).

          "Year 2000 Compliant" shall have the meaning set forth in Section
3.19.

          "Y2K Plan" shall have the meaning set forth in Section 3.19.

          Section 1.2 Other Terms. Other terms may be defined elsewhere in the
text of this Agreement and, unless otherwise indicated, shall have such meaning
indicated throughout this Agreement.

          Section 1.3 Other Definitional Provisions. (a) The words "hereof",
"herein", and "hereunder" and words of similar import, when used in this
Agreement, shall refer to this Agreement as a whole and not to any particular
provision of this Agreement.

          (b) The terms defined in the singular shall have comparable meaning
when used in the plural, and vice versa.

          (c) The terms "dollars" and "$" shall mean United States dollars.

                                      -16-
<PAGE>

                                  ARTICLE II

                          Purchase and Sale of Shares

          Section 2.1 Purchase and Sale of Shares. Buyer agrees to purchase from
Seller, and Seller agrees to sell to Buyer, in each case subject to the terms
and conditions of this Agreement, (i) all of the issued and outstanding Cybertel
Shares for a purchase price equal to $666,000,000 (six hundred sixty-six million
dollars) (the "Cybertel Purchase Price"), and (ii) all of the issued and
outstanding GSAA Shares for a purchase price equal to $54,000,000 (fifty-four
million dollars) (the "GSAA Purchase Price", and together with the Cybertel
Purchase Price, the "Base Purchase Price"), as adjusted pursuant to Section 2.2
(as so adjusted, the "Purchase Price").

          Section 2.2 Adjustment of the Base Purchase Price. The Base Purchase
Price shall be adjusted as follows: The Purchase Price shall be an amount equal
to (a) the Base Purchase Price plus (b) the amount (positive or negative) of (i)
the Closing Working Capital minus (ii) $3,500,000 (three million five hundred
thousand dollars) minus (c) the amount of the Closing Long Term Liabilities
minus (d) the EBITDA Subscriber Amount, if any.

          Section 2.3 Estimated Purchase Price. For the purpose of determining
the amount of cash to be paid by Buyer to Seller on the Closing Date, Seller
shall prepare a calculation of the estimate of the adjustment of the Purchase
Price to be made pursuant to Section 2.2 (the "Estimated Closing Adjustment") as
of the Closing Date based on a good faith estimate by Seller of the amounts
included in such adjustment. Seller shall deliver the calculation of the
Estimated Closing Adjustment to Buyer not less than three Business Days prior to
the Closing Date or, if not practicable, as soon as practicable prior to the
Closing, provided that Seller shall provide such calculation at least three
Business Days prior to the time the Closing is likely to occur. If Buyer objects
to the calculation of the Estimated Closing Adjustment prior to the Closing,
Seller agrees to discuss with Buyer in good faith such objections and to seek to
resolve Buyer's objections and if revised in response to Buyer objections, the
revised amounts shall be the Estimated Closing Adjustment; provided, that if
Buyer and Seller are unable to resolve Buyer's objections prior to

                                      -17-
<PAGE>

the Closing, Seller's calculation of the Estimated Closing Adjustment shall be
utilized for purposes of calculating the Estimated Purchase Price.

          Section 2.4 Closing; Delivery and Payment. (a) The delivery of the
Shares and payment therefor (the "Closing") shall take place at the offices of
Sullivan & Cromwell, 125 Broad Street, New York, New York as promptly as is
practicable on the Business Day on which the conditions set forth in Article VII
hereof have been satisfied or waived (other than those conditions that by their
nature are to be satisfied at the Closing, but subject to the satisfaction or
waiver of those conditions), or at such other time and place as the parties
hereto may mutually agree. The date on which the Closing occurs is called the
"Closing Date". It is understood and agreed that Seller will notify Buyer at
least three Business Days prior to the Closing that the Closing is likely to
occur, specifying the proposed Closing Date and Seller agrees that it will
reimburse Buyer for any interest expense incurred by Buyer (less any earnings
realized by Buyer on borrowed funds) for each day the Closing is delayed. Buyer
agrees at Seller's request to promptly repay any such borrowed funds in the
event the Closing does not occur at the time expected and, in such event, Seller
shall be required to comply with the notice procedures to reschedule the
Closing.

          (b) At the Closing:

               (i)  Seller shall deliver to Buyer (A) certificates representing
     the Cybertel Shares being sold to Buyer and (B) certificates representing
     the GSAA Shares being sold to Buyer, duly endorsed and in form for transfer
     to Buyer; and

               (ii) Buyer shall pay to Seller, by wire transfer to an account
     designated by Seller in writing, immediately available funds in an amount
     equal to the Estimated Purchase Price.

          Section 2.5 Post-Closing Adjustment. (a) As soon as practicable, but
in no event later than ninety (90) days following the Closing Date, Buyer shall,
on a basis consistent with the methods, principles, practices and policies
employed in the preparation and presentation of the Financial Statements and,
where applicable, the Cybertel

                                      -18-
<PAGE>

Cellular Expenditure Budgets or the Cybertel RSA Pro Forma Expenditure Budgets,
as the case may be, prepare and deliver to Seller a statement (the "Closing
Statement") showing the calculation of the Closing Working Capital, the Closing
Long Term Liabilities and the EBITDA Subscriber Amount (the "Calculation").

          (b) After receipt of the Calculation, Seller shall have 30 days to
review the Calculation. Buyer shall provide Seller and its authorized
representatives reasonable access during normal business hours and without
significant disruption to the Business, to (1) all books, records and employees
of Buyer and its Subsidiaries having relevant information concerning the
Calculation to the extent that such information was used in the Calculation and
(2) Buyer's accountants who assisted Buyer in preparing the Calculation and such
accountants' relevant supporting workpapers. Unless Seller delivers written
notice to Buyer on or prior to the 30th day after Buyer's delivery of the
Calculation stating that Seller has objections to the Calculation and describing
any such objections with reasonable particularity (including a basis in the
books and records of the Companies or accounting principles for such objection),
Seller shall be deemed to have accepted and agreed to the Calculation. In
addition, any item included in the Calculation which is not objected to by
Seller shall be deemed to be accepted by Seller ("Resolved Items") and any
amounts included within such item shall be deemed to be final, binding and
conclusive. If Seller notifies Buyer of its objections to the Calculation,
Seller and Buyer shall, within 10 days (or such longer period as the parties may
agree) following such notice (the "Resolution Period"), attempt to resolve their
differences, and any written resolution by them as to any disputed amounts shall
be final, binding and conclusive.

          (c) Any amounts remaining in dispute at the conclusion of the
Resolution Period ("Unresolved Items") shall be submitted to KPMG LLP (such firm
being referred to as the "CPA Firm") or, if such firm shall be unable or
unwilling to serve in such capacity or if the parties shall otherwise mutually
agree, such other nationally recognized firm of independent accountants mutually
agreed by Seller and Buyer (and, in such case, such firm shall be deemed to be
the CPA Firm), within 10 days after the expiration of the Resolution Period.
Each party agrees to execute, if requested by the CPA Firm, an engagement letter
with the CPA

                                      -19-
<PAGE>

Firm containing reasonable terms. All fees and expenses relating to the work, if
any, to be performed by the CPA Firm shall be borne by Seller and Buyer in
inverse proportion to the allocation of the dollar amount of the Unresolved
Items made by the CPA Firm in favor of Seller or Buyer, as the case may be. The
CPA Firm shall act as an arbitrator and not as an expert to determine, based on
the provisions of this Section 2.5, only the Unresolved Items. The CPA Firm's
determination of the Unresolved Items shall be made within 30 days of the
submission of the Unresolved Items to the CPA Firm, and, together with a
calculation of the Closing Working Capital, the Closing Long Term Liabilities
and the EBITDA Subscriber Amount based upon the amount of Resolved Items and the
CPA Firm's determinations of the Unresolved Items, shall be set forth in a
written statement delivered to Seller and Buyer by the CPA Firm and shall be
final, binding and conclusive on the parties for all purposes.

          (d) Within five (5) Business Days following either (i) an agreement by
Buyer and Seller as to the Closing Working Capital, the Closing Long Term
Liabilities and the EBITDA Subscriber Amount or (ii) the CPA Firm's
determination of the Closing Working Capital, the Closing Long Term Liabilities
and the EBITDA Subscriber Amount, Seller shall pay to Buyer the amount, if any,
by which the Estimated Purchase Price exceeds the final calculation of the
Purchase Price determined in accordance with Section 2.2 after resolution of all
disputed items, or Buyer shall pay to Seller the amount, if any, by which the
final calculation of the Purchase Price exceeds the Estimated Purchase Price
(the "Post-Closing Adjustment").

          (e) Any payments made pursuant to this Section 2.5 shall be made by
wire transfer of immediately available funds to an account indicated in writing
by the party to receive such funds and shall be accompanied by interest at the
Applicable Rate calculated on the basis of a year of 360 days for the actual
number of days elapsed, accrued from the Closing Date up to and including the
date of payment.

          (f) Any payments made in respect of the Post-Closing Adjustment shall
be deemed to be adjustments to the Cybertel Purchase Price or the GSAA Purchase
Price in accordance with the portion of the adjustment pursuant to

                                      -20-
<PAGE>

Section 2.2 (Adjustment of the Base Purchase Price) attributable to Cybertel and
GSAA.

                                  ARTICLE III

                   Representations and Warranties of Seller

          Except as otherwise set forth in the correspondingly numbered section
or schedule of the disclosure schedule delivered by Seller to Buyer on the date
of the execution of this Agreement (the "Seller Disclosure Schedule") and
except, if not set forth in the correspondingly numbered schedule of the Seller
Disclosure Schedule, the disclosures therein shall be deemed to be exceptions to
the representations and warranties of Seller to which a reasonable Person would
have considered such disclosure to be an exception, Seller represents and
warrants to Buyer as follows:

          Section 3.1 Organization and Authority of Seller and AMCI. Seller is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware, AMCI is a corporation duly organized, validly existing
and in good standing under the laws of the State of Delaware and each of Seller
and AMCI has all requisite corporate or similar power and authority, and has
taken all corporate action necessary in order to execute, deliver and perform
its obligations under this Agreement and the Ancillary Agreements. This
Agreement is a legal, valid and binding obligation of each of Seller and AMCI,
enforceable in accordance with its terms, and the Ancillary Agreements, when
executed, will each be a legal, valid and binding obligation of AMCI, each, when
executed, enforceable in accordance with its terms, subject to bankruptcy,
insolvency, fraudulent transfer, reorganization, moratorium and similar laws of
general applicability relating to or affecting creditors' rights and to general
equity principles. The execution, delivery and performance of this Agreement by
each of Seller and AMCI does not, and the consummation by the Seller and AMCI of
the transactions contemplated hereby will not, constitute or result in (A) a
breach or violation of, or a default under the certificate of incorporation or
by-laws of Seller or AMCI or (B) assuming compliance with the matters referred
to in Sections 3.11 (Consents and Approvals) and 4.2 (Consents and

                                      -21-
<PAGE>

Approvals), a violation of any law, rule, regulation, judgment, injunction,
order, decree or other restriction of any court or Governmental Entity ("Law"),
except, in the case of clause (B) above, for any breach, violation or default
that would not be reasonably likely to be material in any individual case or in
the aggregate or to prevent, materially delay or materially impair the ability
of the Seller, AMCI, the Companies or any of their Subsidiaries to consummate
the transactions contemplated by this Agreement or any of the Ancillary
Agreements.

          Section 3.2 Organization and Qualification of the Companies. Each of
the Companies is a corporation duly organized, validly existing and in good
standing under the laws of the State of Delaware or Illinois, as applicable, and
has the corporate power and authority to own or lease its assets and to carry on
its business substantially as it is being conducted on the date hereof, and is
duly qualified as a foreign corporation to do business and is in good standing,
in each jurisdiction where the ownership or operation of its property and assets
or the conduct of its business requires such qualification, except where the
failure to be so qualified or in good standing would not be reasonably likely to
have a Material Adverse Effect. The consummation of the transactions
contemplated hereby will not constitute or result in (A) a breach or violation
of, or a default under, the articles of incorporation or by-laws or similar
organizational documents of the Companies or any of their respective
Subsidiaries or (B) assuming compliance with the matters referred to in Sections
3.11 (Consents and Approvals) and 4.2 (Consents and Approvals), a violation of
any Law or governmental or non-governmental permit or license to which the
Companies or any of their respective Subsidiaries are subject, except, in the
case of clause (B) above, for any breach, violation, default, acceleration or
creation that would not be reasonably likely to, either individually or in the
aggregate, be material or prevent, materially delay or materially impair the
ability of the Seller to consummate the transactions contemplated by this
Agreement or any of the Ancillary Agreements.

          Section 3.3 Capitalization of the Companies. (a) The authorized
capital stock of Cybertel consists of 100,000 Cybertel Shares and 175 shares of
preferred stock of which 2,250 Cybertel Shares are the only shares of capital
stock of Cybertel issued and outstanding. The issued and

                                      -22-
<PAGE>

outstanding Cybertel Shares have been duly authorized and validly issued, are
fully paid and nonassessable and are owned by Seller free and clear of any
Encumbrances. There are no preemptive or other outstanding rights, options,
warrants, conversion rights, stock appreciation rights, redemption rights,
agreements, arrangements or commitments to issue or sell any shares of capital
stock or other securities of Cybertel or any of its Subsidiaries or any
securities or obligations convertible or exchangeable into or exercisable for,
or giving any Person a right to subscribe for or acquire, any securities of
Cybertel or any of its Subsidiaries, and no securities or obligations evidenc
ing such rights are authorized, issued or outstanding. Cybertel does not have
outstanding any bonds, debentures, notes or other obligations the holders of
which have the right to vote (or which are convertible into or exercisable for
securities having the right to vote) with the stockholders of Cybertel on any
matter.

          (b) The authorized capital stock of GSAA consists of 1,000 GSAA Shares
all of which are issued and outstanding. All of the GSAA Shares have been duly
authorized and validly issued, are fully paid and nonassessable and are owned by
Seller free and clear of any Encumbrances. There are no preemptive or other
outstanding rights, options, warrants, conversion rights, stock appreciation
rights, redemption rights, agreements, arrangements or commitments to issue or
sell any shares of capital stock or other securities of GSAA or any of its
Subsidiaries or any securities or obligations convertible or exchangeable into
or exercisable for, or giving any Person a right to subscribe for or acquire,
any securities of GSAA or any of its Subsidiaries, and no securities or
obligations evidencing such rights are authorized, issued or outstanding. GSAA
does not have outstanding any bonds, debentures, notes or other obligations the
holders of which have the right to vote (or which are convertible into or
exercisable for securities having the right to vote) with the stockholders of
GSAA on any matter.

          (c) As of the date hereof and except as set forth in the Contracts
listed on Schedule 3.10(a)(vii), the Companies and their Subsidiaries are not
subject to capital calls with respect to any of their respective Subsidiaries.
There are no notices of capital calls outstanding which have not been satisfied
as of the date hereof.

                                      -23-
<PAGE>

          Section 3.4 Subsidiaries of the Companies; Minority Interests. (a)
Schedule 3.4(a) hereto lists the name of each Subsidiary of Cybertel and the
equity interest of Cybertel or one of its Subsidiaries therein, together with
the jurisdiction of its incorporation or organization, as the case may be, and
to the Knowledge of Seller, the name of each other record and beneficial holder
of the shares of capital stock or other similar equity interests of such
Subsidiary. On or prior to the Closing Date, the transactions described in
Section 6.29 will be consummated and, on or prior to the Closing Date, Cybertel
and/or one or more of its wholly owned Subsidiaries will own 100% of the equity
interests in Cybertel RSA. All shares of capital stock or similar equity
interests of each Subsidiary of Cybertel that are owned by Cybertel or a
Subsidiary of Cybertel are owned by Cybertel or the applicable Subsidiary free
and clear of all Encumbrances, and all such capital stock is duly authorized,
validly issued, fully paid and nonassessable and all other such similar equity
interests are duly authorized, validly issued and fully paid. Each Subsidiary of
Cybertel is a corporation, limited partnership, or general partnership, as the
case may be, duly organized or formed, as the case may be, validly existing and
in good standing under the laws of its jurisdiction of organization or
formation, as the case may be, has the power and authority to own or lease its
assets and to carry on its business substantially as it is being conducted as of
the date hereof, and is duly qualified as a foreign corporation, limited
partnership or general partnership to do business, and is in good standing, in
each jurisdiction where the ownership or operation of its properties and assets
or the conduct of its business requires such qualification, except where the
failure to be so qualified would not be reasonably likely to have a Material
Adverse Effect.

          (b) Schedule 3.4(b) hereto lists the name of each Subsidiary of GSAA,
and the equity interest of GSAA or one of its Subsidiaries therein, together
with the jurisdiction of its incorporation or organization, as the case may be,
and to the Knowledge of Seller, the name of each other record and beneficial
holder of the shares of capital stock or other similar equity interests of such
Subsidiary. All shares of capital stock or similar equity interests of each
Subsidiary of GSAA that are owned by GSAA or a Subsidiary of GSAA are owned by
GSAA or the applicable Subsidiary free and clear of all Encumbrances, and all
such capital stock is

                                      -24-
<PAGE>

duly authorized, validly issued, fully paid and nonassessable and all other such
similar equity interests are duly authorized, validly issued and fully paid.
Each Subsidiary of GSAA is a corporation or limited partnership, as the case may
be, duly organized or formed, as the case may be, validly existing and in good
standing under the laws of its jurisdiction of organization or formation, as the
case may be, has the power and authority to own or lease its assets and to carry
on its business substantially as it is being conducted as of the date hereof,
and is duly qualified as a foreign corporation or limited partnership to do
business, and is in good standing, in each jurisdiction where the ownership or
operation of its properties and assets or the conduct of its business requires
such qualification, except where the failure to be so qualified would not be
reasonably likely to have a Material Adverse Effect.

          Section 3.5 Financial Statements. (a) Attached hereto as Schedule
3.5(a) is a copy of the audited consolidated balance sheet of Cybertel and its
Subsidiaries as of December 31, 1998 and the audited consolidated statements of
loss, changes in shareowners' equity and cash flows for Cybertel and its
Subsidiaries for the year ended December 31, 1998 (collectively, with the notes
thereto, the "Cybertel Financial Statements"). The Cybertel Financial Statements
present fairly, in all material respects, the financial position of Cybertel and
its Subsidiaries as of December 31, 1998, and the results of operations of
Cybertel and its Subsidiaries for the year ended December 31, 1998 and have been
prepared in accordance with GAAP applied on a basis consistent with past
practice.

          (b)  Attached hereto as Schedule 3.5(b) is a copy of the audited
consolidated balance sheet of GSAA and its Subsidiaries as of December 31, 1998
and the audited statements of loss, changes in shareowners' equity and cash
flows for GSAA and its Subsidiaries for the year ended December 31, 1998
(collectively, with the notes thereto, the "GSAA Financial Statements" and,
together with the Cybertel Financial Statements, the "Companies Financial
Statements"). The GSAA Financial Statements present fairly, in all material
respects, the financial position of GSAA and its Subsidiaries as of December 31,
1998, and the results of operations of GSAA and its Subsidiaries for the year
ended December 31, 1998 and have been prepared in accordance with GAAP applied
on a basis consistent with past practice.

                                      -25-
<PAGE>

          (c)  Attached hereto as Schedule 3.5(c) is a copy of the audited
balance sheet of Cybertel Cellular as of December 31, 1998 and the audited
statements of income, liabilities and partners' capital and cash flows for
Cybertel Cellular for the year ended December 31, 1998 (collectively, with the
notes thereto, the "Cybertel Cellular Financial Statements" and, together with
the Companies Financial Statements, the "Financial Statements"). The Cybertel
Cellular Financial Statements present fairly, in all material respects, the
financial position of Cybertel Cellular as of December 31, 1998, and the results
of operations of Cybertel Cellular for the year ended December 31, 1998 and have
been prepared in accordance with GAAP applied on a basis consistent with past
practice.

          (d) The Companies and their Subsidiaries do not have any liability or
obligation of any nature which is required to be disclosed in financial
statements prepared in accordance with GAAP (including the notes thereto) other
than those (i) set forth in the Financial Statements, (ii) incurred after
December 31, 1998 in the ordinary course of the Business consistent with past
practice and which would not be reasonably likely to have a Material Adverse
Effect or (iii) those liabilities relating to or arising out of the Business for
which any Person shall become liable in accordance with the matters contemplated
in Sections 6.4 (Employee Benefit Plans), 6.7 (Company Assets), 6.11
(Litigation) and 6.14 (Contracts).

          (e) Attached hereto as Schedule 3.5(e) is the pro forma combined
balance sheet of the Companies and their Subsidiaries as of December 31, 1998
(the "Companies Pro Forma Balance Sheets") reflecting the combined financial
position of the Companies and their respective Subsidiaries after giving effect
to the Restructuring and the other asset transfers required under this
Agreement. The Companies Pro Forma Balance Sheets have been prepared in good
faith from the books and records of Seller and its Subsidiaries.

          (f) Attached hereto as Schedule 3.5(f) is a pro forma balance sheet of
Cybertel RSA as of December 31, 1998 (the "Cybertel RSA Pro Forma Balance
Sheet") reflecting the financial position of Cybertel RSA after giving effect to
the Restructuring and the other asset transfers required under this Agreement.
The Cybertel RSA Pro Forma Balance

                                      -26-
<PAGE>

Sheet has been prepared in good faith from the books and records of Seller and
its Subsidiaries.

          (g) Attached hereto as Schedule 3.5(g) is a true and correct copy of
the capital expenditures budgets for Cybertel Cellular for the twelve month
period ending December 31, 1999 and for the twelve month period ending December
31, 2000 (the "Cybertel Cellular Expenditure Budgets").

          (h) Attached hereto as Schedule 3.5(h)are the pro forma capital
expenditure budgets for Cybertel RSA for the twelve month period ending December
31, 1999 and for the twelve month period ending December 31, 2000 (the "Cybertel
RSA Pro Forma Expenditure Budgets") on a pro forma basis to exclude any capital
expenditures related to the Excluded Business. Such Cybertel RSA Pro Forma
Expenditure Budgets have been prepared in good faith from the books and records
of Seller and its Subsidiaries.

          Section 3.6 Absence of Certain Changes or Events. Since December 31,
1998 (i) the Companies and their Subsidiaries have conducted their businesses
and Seller has conducted the Business, taken together, in the ordinary course
consistent with past practice except to the extent arising out of or relating to
the consummation of the transactions contemplated by this Agreement (including
the Restructuring), and (ii) there has not been any change in the Companies' and
their Subsidiaries' businesses or results of operations which has resulted in or
would be reasonably likely to result in a Material Adverse Effect.

          Section 3.7 Communications Licenses. The Companies and their
respective Subsidiaries have been granted all Communications Licenses, except
for those Communications Licenses the failure of which to have been granted
would not be reasonably likely to be material. Schedule 3.7 sets forth a true,
accurate and complete list of the Communications Licenses held by the Companies
and their Subsidiaries and used directly in connection with the Business, and
the identity of the Person that holds each such Communications License. All
Communications Licenses are valid and in full force and effect, except where the
failure to be valid or in full force and effect would not be reasonably likely
to be material. The Companies and their respective Subsidiaries are not
conducting the Business in violation of any

                                      -27-
<PAGE>

Communications License listed on Schedule 3.7, except for those failures which,
individually or in the aggregate, are not material. There is not pending, nor to
the Knowledge of Seller threatened, against the Companies or any of their
respective Subsidiaries, any application, action, petition, objection or other
pleading, or any proceeding, with the FCC, the ICC, or any other Governmental
Entity which questions or contests the validity of, or nonrenewal or suspension
of any Communications License which would be reasonably likely to, either
individually or in the aggregate, be material.

          Section 3.8 Litigation. Except for the Consent Decree, as of the date
hereof, there are no (x) decrees, judgments, orders or awards to which the
Business or any of the assets of the Business are subject or (y) civil, criminal
or administrative claims, actions, suits, demands, proceedings or investigations
pending or to the Knowledge of Seller, threatened against the Business or the
Companies or any of their respective Subsidiaries, at law, in equity or
otherwise, in, before, or by, any court or Governmental Entity or authority,
except for such decrees, judgments, orders, awards, claims, actions, suits,
demands, proceedings or investigations which are not, in the aggregate,
material.

          Section 3.9 Compliance with Law and Licenses. The Companies and their
respective Subsidiaries (a) are conducting their respective businesses in
compliance, with all applicable Laws (other than Licenses, except to the extent
relating to zoning matters), except for those failures to comply which,
individually or in the aggregate, are not material and (b) have obtained and are
in compliance with the terms of all Licenses, which are required for the
Companies and their Subsidiaries to conduct the Business, except for those the
failure to obtain or to comply with which would not be reasonably likely to
have, either individually or in the aggregate, a Material Adverse Effect; it
being understood, in each case, that nothing set forth in this Section 3.9 is
intended to address any compliance issue that is the subject of any other
representation or warranty set forth herein.

          Section 3.10 Contracts. (a) Schedule 3.10(a) lists the following
Contracts (A) to which either of the Companies or one of their respective
Subsidiaries is a party

                                      -28-
<PAGE>

or (B) to which Seller or an Affiliate of Seller is a party and which relates
exclusively to the Business:

          (i)    any agreement which materially restricts or materially limits
the ability of either of the Companies or any of their respective Subsidiaries
or Affiliates to freely conduct cellular telephone operations or otherwise
operate in any market;

          (ii)   any collective bargaining agreement and any written employment
agreement;

          (iii)  all agreements which involved payments to or from the Companies
or any of their Subsidiaries or on behalf of the Business of more than
$5,000,000 during the twelve month period ended December 31, 1998;

          (iv)   all agreements which specifically provide for payments to or
from the Companies or any of their Subsidiaries or on behalf of the Business of
more than $5,000,000 during any twelve-month period beginning after December 31,
1998;

          (v)    all agreements with respect to outstanding indebtedness for
money borrowed or any guaranty thereof;

          (vi)   all leases of real property, with an annual rental payment in
excess of $30,000 and all cell site leases;

          (vii)  all partnership or joint venture agreements or other agreements
relating to the management or control of any such partnership or joint venture;

          (viii) volume customer Contracts with each of the top 25 customers of
the Business (by revenue) during the twelve months ended December 31, 1998,
including any national account agreements that meet such criterion;

          (ix)   all distributor agreements which generated gross line additions
in excess of 1,000 during the twelve months ended December 31, 1998 (such
agreements represent approximately 70% of gross line additions generated by all
agents/distributors for the Business during such period) and all reseller
agreements.

                                      -29-
<PAGE>

          (x)    all sponsorship agreements;

          (xi)   all interconnection agreements;

          (xii)  all Contracts which materially restrict the ownership of any
material asset owned by the Companies or their Subsidiaries;

          (xiii) any Contract with an Affiliate listed on Schedule 3.18 (which
is incorporated herein by reference); and

          (xiv)  any roaming agreements not terminable at the option of either
party thereto on 30 days or less notice.

          Notwithstanding the foregoing, Schedule 3.10(a) (other than with
respect to subclauses (i), (ii) and (vii) above) shall be deemed updated as of
the Closing Date to delete any Contracts meeting any of the criteria set forth
above which have been terminated, have expired or not been renewed between the
date hereof and the Closing Date and to add any Contracts meeting such criteria
entered into between the date hereof and the Closing Date, provided in each case
such Contracts have been entered into, terminated or expired in the ordinary
course of business of the Companies and their Subsidiaries consistent with past
practice.

          (b) Seller has made available to Buyer a correct and complete copy of
each Contract listed on Schedule 3.10(a) as of the date hereof, together with
any and all amendments or modifications thereto. Each Contract listed on
Schedule 3.10(a) is valid, binding, enforceable, and in full force and effect,
the Companies or the applicable Subsidiary are not in breach or default under
any such Contract and no event has occurred which, with notice or lapse of time
or both, would constitute such a breach or default, or permit termination,
modification, or acceleration, under such Contract, except where the failure to
be so valid, binding, enforceable or in full force and effect or such breach or
default, termination, modification or acceleration would not be, either
individually or in the aggregate, reasonably likely to be material.

          (c) The execution, delivery and performance of this Agreement by
Seller and AMCI and the execution,

                                      -30-
<PAGE>

delivery and performance of the Ancillary Agreements by AMCI does not, and the
consummation by Seller and AMCI of the transactions contemplated hereby and by
AMCI of the transactions contemplated thereby will not, constitute or result in
a breach or violation of, a default under, or the acceleration of any
obligations, a right of early termination, a right of first refusal or the
creation of an Encumbrance (with or without notice, lapse of time or both) on
the assets of Seller, the Companies or any of the Subsidiaries of the Company
pursuant to, any Contracts set forth on Schedule 3.10(a), except for any breach,
violation, default, right, acceleration or creation that would not be reasonably
likely to be material in any individual case or in the aggregate or to prevent,
materially delay or materially impair the ability of Seller, the Companies or
any of their Subsidiaries to consummate the transactions contemplated by this
Agreement or any of the Ancillary Agreements.

          (d) Schedule 3.10(d) lists all material Contracts which are not listed
on Schedule 3.10(a) to which Seller or any of its Affiliates are a party (and
none of the Companies or their Subsidiaries are parties) pursuant to which the
Companies or any of their Subsidiaries provide or receive goods, products,
services or other benefits.

          Section 3.11 Consents and Approvals. Except for the filings, permits,
authorizations, consents, approvals and/or notices (A) set forth in Schedule
3.11, (B) required under the HSR Act, (C) required by the applicable
requirements of the FCC, or under the Communications Act or (D) required by the
state public utilities commissions or similar communications or utility
regulatory bodies having jurisdiction over Seller, the Companies and the
Companies' Subsidiaries (such consents referred to in clauses (C) and (D) of
this Section 3.11 being collectively referred to herein as, the "Cellular
Authorizations"), no filings, permits, authorizations, consents, approvals
and/or notices are required to be made or obtained by Seller, the Companies or
any of their respective Subsidiaries with or from, as the case may be, any
Governmental Entity, in connection with the execution and delivery of this
Agreement by Seller and the consummation by Seller of the transactions
contemplated hereby, except those for which the failure to make or obtain, as
the case may be, would not be, either individually or in the aggregate,
reasonably likely to be

                                      -31-
<PAGE>

materially adverse to the Companies and their Subsidiaries, taken as a whole or
be reasonably likely to prevent, materially delay or materially impair the
ability of Seller to consummate the transactions contemplated by this Agreement.
To the Knowledge of Seller, no issue relating to Seller or its Affiliates exists
that would inhibit Buyer and Seller from promptly obtaining any material
Governmental Consent.

          Section 3.12 Tax Matters. (a) All Tax Returns that are required to be
filed by or with respect to each of the Companies and their respective
Subsidiaries have been duly and timely filed or, where not so filed, are covered
under a valid extension that has been obtained therefor, (b) all Taxes shown to
be due on the Tax Returns referred to in clause (a) have been paid in full, and
there are no material liens or encumbrances on any of the assets of the
Companies or any of their Subsidiaries that arose in connection with the failure
or alleged failure to pay any Tax, (c) the Tax Returns referred to in clause (a)
are not subject to examination currently by the IRS or the appropriate state,
local or foreign taxing authority, and no written notice has been received by
Seller, any of the Companies, or any of their Subsidiaries with respect to any
actual or threatened audit or examination, (d) all deficiencies asserted or
assessments made as a result of the examinations of any of the Tax Returns
referred to in clause (a) have been paid in full, (e) no issues that have been
raised by the relevant taxing authority in connection with the examination of
any of the Tax Returns referred to in clause (a) are currently pending, (f) no
waivers of statutes of limitation have been given by or requested with respect
to any Taxes of the Companies or any of their respective Subsidiaries, (g) none
of the Companies or any of their Subsidiaries is obligated to make any material
payments, or is a party to an agreement that under certain circumstances could
obligate it to make any material payments that will not be deductible under
section 280G (and for the purposes of this Section 3.12(g), the term material
shall mean any payment (individually or in the aggregate) of $300,000 or more),
(h) none of the Companies or any of their Subsidiaries have filed a consent
under Section 341(f) of the Code concerning collapsible corporations (i) none of
the Companies or any of their Subsidiaries have been a party to any distribution
occurring during the last 3 years in which the parties to such distribution
treated the distribution as

                                      -32-
<PAGE>

one to which Section 355 of the Code applied, and (j) to the Knowledge of
Seller, each of the Companies and their Subsidiaries has withheld and paid all
material Taxes required to have been withheld and paid by them in connection
with (1) amounts paid or owing to any employee, independent contractor,
creditor, stockholder, or other third party, and (2) amounts received from
customers or other third parties (including, but not limited to, sales, use and
excise taxes).

          Section 3.13 Labor Matters. As of the date hereof, there is no
pending, or, to the Knowledge of Seller, threatened, strike, walkout or other
work stoppage or any union organizing effort by or respecting the employees of
Seller, AMCI, the Companies or any of their respective Subsidiaries who perform
work in connection with the Business.

          Section 3.14 Employee Benefits. (a) Schedule 3.14(a) hereto contains a
complete and accurate list of each employee benefit, stock purchase, stock
option, severance, change-in-control, fringe benefit, bonus, incentive and
deferred compensation plan, agreement, policy or other arrangement maintained by
Parent or its Subsidiaries which covers current or former employees of Seller,
AMCI, the Companies or any of their respective Subsidiaries who perform or have
performed work for the Business (the "Benefit Plans"). There are no employee
benefit plans, other than the Benefit Plans, which cover the current and former
employees of Seller, AMCI, the Companies or any of their respective Subsidiaries
who perform or have performed work for the Business. Copies of all Benefit Plans
and all amendments thereto and of all summary plan descriptions or summaries of
material modifications have been delivered or made available to Buyer.

          (b) All Benefit Plans are in substantial compliance with all
applicable laws, including the Code and the Employee Retirement Income Security
Act of 1974, as amended ("ERISA"). The Parent has received a favorable
determination letter from the IRS with respect to the qualified status of each
Benefit Plan which is an "employee pension benefit plan" within the meaning of
Section 3(2) of ERISA (a "Pension Plan") and which is intended to be qualified
under Section 401(a) of the Code and Seller does not have Knowledge of any
circumstances which are reasonably

                                      -33-
<PAGE>

likely to cause the revocation of such letter. There is no material pending or,
to the Knowledge of Seller, threatened action, suit or claim relating to the
Benefit Plans that could reasonably be expected to materially increase its
liability with respect to such Benefit Plans. None of Parent, Seller, the
Companies or any of their respective Subsidiaries has engaged in any transaction
with respect to any Benefit Plan that is reasonably likely to subject the
Companies or any of their respective Subsidiaries to a material tax or penalty
imposed by Section 4975 of the Code.

          (c) No liability under Title IV of ERISA has been or is expected to be
incurred by either the Companies or any of their respective Subsidiaries with
respect to any ongoing, frozen or terminated "single-employer plan", within the
meaning of Section 4001(a)(15) of ERISA, currently or formerly maintained by any
of them, or the single-employer plan of any entity which is considered one
employer with the Companies under Section 4001 of ERISA or Section 414 of the
Code (an "ERISA Affiliate"), other than the payment of premiums to the Pension
Benefit Guaranty Corporation contributed to by the Companies or any of their
respective Subsidiaries or any ERISA Affiliate. Neither of the Companies nor any
of their respective Subsidiaries has contributed, or been obligated to
contribute, to a "multiemployer plan" (within the meaning of Section 3(37) of
ERISA) at any time during the six-year period prior to the date hereof, or
otherwise has any liability to any multiemployer plan.

          (d) Neither of the Companies nor any of their respective Subsidiaries
has any obligations for retiree health and life benefits under any Benefit Plan.

          (e) Except as set forth on Schedule 3.14(e), the consummation of the
transactions contemplated by this Agreement will not (x) entitle any of the
employees of the Companies or any of their respective Subsidiaries to severance
pay or (y) accelerate or provide any other rights or credits under, or increase
the amount payable or trigger any other obligation pursuant to, any of the
Benefit Plans. No Transferred Employee is covered by the Parent Management
Employees Severance Pay Plan.

          Section 3.15 Environmental Matters. The Business and the Companies and
their Subsidiaries (i) are in

                                      -34-
<PAGE>

compliance in all material respects with applicable Environmental Laws; (ii) as
of the date hereof have not received any written notices from any Governmental
Entity alleging the material violation of any applicable Environmental Law and,
to the Knowledge of Seller, are not aware of any conditions which materially
violate any applicable Environmental Law; (iii) are not the subject of any
material court order, administrative order or decree arising under any
Environmental Law; (iv) have not generated, stored, used, emitted, discharged or
disposed of any Hazardous Substance except in material compliance with
applicable Environmental Laws and, to the Knowledge of Seller, are not aware of
the presence of Hazardous Substances in the structures, soil, subsoil,
sediments, and groundwater at, on or beneath the properties owned or leased by
the Companies and their Subsidiaries or to be transferred to the Companies or
their Subsidiaries pursuant to this Agreement which would reasonably be expected
to require remediation under applicable Environmental Laws; and (v) have
constructed all facilities, equipment and structures in material compliance in
all material respects with applicable Environmental Laws. This Section 3.15
constitutes the sole representation and warranty of the Seller with respect to
any Environmental Law or any Hazardous Substance.

          Section 3.16 Property and Leases. Schedule 3.16(a) contains a list of
all real property owned by the Companies or any of their respective Subsidiaries
and real property leased pursuant to lease agreements set forth on Schedule
3.10(a) (which includes all cell site leases used in the Business) and the
address of any such owned real property. The Companies and their Subsidiaries
have marketable title to all material owned real property set forth on Schedule
3.16(a), and such owned real property and all cellular switches and cell site
towers and equipment affixed thereto and owned by the Companies and their
Subsidiaries are free and clear of all Encumbrances, except for (i)
materialmen's, mechanics', carriers', workmen's and repairmen's liens and other
similar liens arising in the ordinary course of business, (ii) pledges or
deposits to secure obligations under Workers' Compensation laws or similar
legislation or to secure public or statutory obligations, (iii) Encumbrances for
Taxes or assessments not yet delinquent or being contested in good faith, (iv)
imperfections of title and Encumbrances, if any, that do not materially detract
from the value, or materially interfere

                                      -35-
<PAGE>

with the use or marketability of the property affected thereby, (v) Encumbrances
set forth on the title insurance policies relating to such properties and (vi)
rights reserved to or vested in any Governmental Entity to control or regulate
any such entity's property or assets in any manner. Each real property site
which is a leased cell site or is owned real property set forth on Schedule
3.16(a) has lawful rights of ingress and egress to permit sufficient access to
such sites from public roadways, except where the failure to have such rights
would not be material. All cellular switches and cell site towers and equipment
affixed thereto owned by the Companies and their Subsidiaries are in good
operating condition and repair, reasonable wear and tear excepted.

          Section 3.17 Accounts Receivable; Debt. Neither the Companies nor any
of their Subsidiaries have sold or assigned any of their respective accounts
receivable (whether or not reflected in the Financial Statements) to any third
party during the past two years.

          Section 3.18 Affiliate Transactions. Schedule 3.18 lists all written
Contracts between the Companies or one of their Subsidiaries and any Affiliates
(other than the Companies and one of their Subsidiaries) of Seller.

          Section 3.19 Year 2000 Compliance. AMCI has developed a plan (the "Y2K
Plan") designed to confirm that all computer software and systems (including
hardware, firmware, operating system software, utilities, embedded processors
and application's software) used in and material to the Business and owned by
AMCI, Seller, the Companies or their Subsidiaries (the "Systems") are designed
to operate during and after the calendar year 2000 to accurately process data
(including but not limited to calculating, comparing and sequencing) from, into
and between the twentieth and twenty-first centuries, including leap year
calculations ("Year 2000 Compliant"), and AMCI is using its reasonable best
efforts to implement the Y2K Plan with respect to the Business in accordance
with the terms thereof. Seller has delivered a true and complete copy of the Y2K
Plan to Buyer. To the Knowledge of Seller (i) the Y2K Plan, when fully
implemented, will render the Systems Year 2000 Compliant in all material
respects, (ii) no problems have been identified that are not capable of being
remedied which could reasonably be expected to result in the

                                      -36-
<PAGE>

Systems not being Year 2000 Compliant in any material respect and (iii) AMCI
has, consistent with industry practice, inquired of all of the vendors and
suppliers of computer software and systems as to whether such vendors and
suppliers are taking reasonable steps to confirm that their systems and software
are Year 2000 Compliant and as of the date hereof no material problems have been
reported to Seller or any of its Affiliates.

          Section 3.20 Ability to Conduct Business. The (i) assets listed on
Schedule 6.7 (Company Assets) and being transferred to the Companies and their
Subsidiaries on or before the Closing Date, (ii) tangible and intangible assets
currently leased or owned by the Companies and their Subsidiaries and to be
retained by the Companies or any of their Subsidiaries after the Closing Date,
(iii) services to be provided and assets to be made available pursuant to the
Ancillary Agreements (which in the case of the Transition Services Agreement
shall include only those services and assets set forth on the schedules thereto
as in effect on the date hereof) and (iv) services and arrangements and assets
set forth on Schedule 3.20 (including those provided by third parties), taken
together constitute all of the tangible and intangible assets, services and
arrangements that are required to conduct the Business consistent with levels of
performance as of the date hereof (it being understood and agreed that nothing
set forth in this Section 3.20 constitutes a representation or warranty that the
Business can or will be operated at such performance levels following the
Closing Date) or are otherwise used exclusively in the Business. Except for the
services and assets provided under the Ancillary Agreements and the Trademark
License Agreement and any services and arrangements set forth on Schedule 3.20,
no services or assets required to conduct the Business are provided through
arrangements with Seller or any of its Affiliates (other than the Companies and
their Subsidiaries).

          Section 3.21 Brokers and Finders. None of Seller, the Companies or any
of the Companies' respective Subsidiaries or any of their respective Affiliates
have employed any broker, finder, consultant or intermediary in connection with
the transactions contemplated by this Agreement who would be entitled to a
broker's, finder's or similar fee or commission in connection therewith or upon
the consummation thereof.

                                      -37-
<PAGE>

          Section 3.22 Service Marks. One or more of the Companies owns state
and/or federal registrations for the service marks set forth on Schedule 3.22
(the "Service Marks") and the registrations for the Service Marks are valid and
subsisting. No material claims challenging the ownership, validity or
enforceability of the Service Marks are pending or, to the Knowledge of Seller,
threatened; to the Knowledge of Seller, there is no unauthorized use,
infringement or misappropriation of the Service Marks by any third party; and,
as of the date hereof, there is no pending or, to the Knowledge of Seller,
threatened claims of infringement or misappropriation against any of the Service
Marks which are material to the Business.

          Section 3.23 No Other Representations or Warranties. Except for the
representations and warranties contained in this Article III, neither Seller,
the Companies, any Subsidiary of either of the Companies nor any other Person
makes any other express or implied representation or warranty on behalf of
Seller, the Companies or any Subsidiary of either of the Companies.

                                  ARTICLE IV

                    Representations and Warranties of Buyer

          Except as set forth in the correspondingly numbered Section of the
disclosure schedule delivered by Buyer to Seller on the date of this Agreement
(the "Buyer Disclosure Schedule") and except, if not set forth in the
correspondingly numbered section of the Buyer Disclosure Schedule the
disclosures therein shall be deemed to be exceptions to the representations and
warranties of Buyer to which a reasonable Person would have considered such
disclosure to be an exception, Buyer represents and warrants to Seller as
follows:

          Section 4.1 Organization and Authority of Buyer and Buyer Parent.
Buyer is a corporation duly organized, validly existing and in good standing
under the laws of the State of Delaware, Buyer Parent is a corporation duly
organized, validly existing and in good standing under the laws of the State of
New York and each of Buyer and Buyer Parent has all requisite corporate or
similar power and authority, and has taken all corporate action necessary in

                                      -38-
<PAGE>

order, to execute, deliver and perform its obligations under this Agreement and,
in the case of Buyer, the Ancillary Agreements. This Agreement is a legal, valid
and binding obligation of each of Buyer and Buyer Parent, enforceable in
accordance with its terms and the Ancillary Agreements, when executed, will each
be a legal, valid and binding obligation of Buyer, each enforceable in
accordance with its terms, subject to bankruptcy, insolvency, fraudulent
transfer, reorganization, moratorium and similar laws of general applicability
relating to or affecting creditors' rights and to general equity principles. The
execution, delivery and performance of this Agreement by each of Buyer and Buyer
Parent does not, and the consummation by Buyer and Buyer Parent of the
transactions contemplated hereby will not, constitute or result in (a) a breach
or violation of, or a default under, the certificate of incorporation or by-laws
of Buyer or Buyer Parent, (b) a breach or violation of, a default under, or the
acceleration of any obligations, a right of early termination, a right of first
refusal or the creation of any Encumbrance on the assets of Buyer or Buyer
Parent (with or without notice, lapse of time or both) pursuant to, any
Contracts binding upon Buyer or Buyer Parent or (c) assuming compliance with the
matters referred to in Sections 3.11 (Consents and Approvals) and 4.2 (Consents
and Approvals), a violation of any Law or governmental or non-governmental
permit or license to which Buyer or Buyer Parent is subject, except, in the case
of clause (b) or (c) above, for any breach, violation, default, acceleration or
creation that would not be reasonably likely to either, individually or in the
aggregate, be material or materially delay or materially impair the ability of
Buyer or Buyer Parent to consummate the transactions contemplated by this
Agreement or any of the Ancillary Agreements.

          Section 4.2 Consents and Approvals. Except for the filings, permits,
authorizations, consents, approvals and/or notices (a) set forth in Schedule
4.2, (b) required under the HSR Act or (c) required to obtain the Cellular
Authorizations, no filings, permits, authorizations, consents, approvals or
notices are required to be made or obtained by Buyer or any of its Subsidiaries
with or from, as the case may be, any Governmental Entity, in connection with
the execution and delivery of this Agreement by Buyer and the consummation by
Buyer of the transactions contemplated hereby, except those for which the
failure to make or obtain would not be, either individually or in the

                                      -39-
<PAGE>

aggregate, reasonably likely to be material or reasonably likely to prevent,
materially delay or materially impair the ability of Buyer to consummate the
transactions contemplated by this Agreement.

          Section 4.3 Brokers and Finders. Buyer and its Subsidiaries have not
employed any broker, finder, consultant or intermediary in connection with the
transactions contemplated by this Agreement who would be entitled to a broker's,
finder's or similar fee or commission in connection therewith or upon the
consummation thereof, or if the Closing does not occur.

          Section 4.4 Financial Capability. Buyer has sufficient funds to
purchase the Shares on the terms and conditions contemplated by this Agreement
and to consummate the transactions contemplated hereby and has sufficient funds
to perform its obligations and the obligations of the Companies (including any
obligations the Companies may have with respect to their Subsidiaries) after the
Closing Date.

          Section 4.5 Securities Act. Buyer is acquiring the Shares solely for
the purpose of investment and not with a view to, or for sale in connection
with, any distribution thereof in violation of the Securities Act. Buyer
acknowledges that the Shares are not registered under the Securities Act or any
applicable state securities law, and that such Shares may not be transferred,
sold or otherwise disposed of except pursuant to the registration provisions of
the Securities Act or pursuant to an applicable exemption therefrom and pursuant
to state securities laws and regulations as applicable.

          Section 4.6 Litigation. Except for the Consent Decree, as of the date
hereof, there are no (x) decrees, judgments, orders or awards to which Buyer or
its properties are subject to or (y) civil, criminal or administrative claims,
actions, suits, demands, proceedings or investigations pending or to the
Knowledge of Buyer threatened against Buyer or any of its Subsidiaries, at law,
in equity or otherwise, in, before, or by, any court or Governmental Entity or
authority, except for such decrees, judgments, orders, awards, claims, actions,
suits, demands, proceedings, or investigations which would not, in the
aggregate, be reasonably likely to prevent, materially delay or

                                      -40-
<PAGE>

materially impair the ability of Buyer to consummate the transactions
contemplated hereby.

          Section 4.7 Investigation by Buyer. Buyer acknowledges that it is a
sophisticated purchaser of businesses and has been given sufficient access to
all information with respect to the Companies and their respective Subsidiaries
requested by Buyer and, in entering into this Agreement, has not relied upon
anything other than the representations and warranties of Seller set forth in
Article III. Buyer acknowledges that no other representations and warranties of
Seller other than as are set forth in Article III are required by Buyer to enter
into this Agreement. Buyer acknowledges that none of Parent, Seller, the
Companies, the Subsidiaries of the Companies or any other Person shall have any
liability with respect to the Confidential Information Memorandum or any
information with respect to the Companies or their respective Subsidiaries made
available to Buyer prior to the date hereof; provided, that the foregoing shall
not limit the scope of any representation or warranty contained in this
Agreement or any Ancillary Agreement.

          Section 4.8 Governmental Consents. To the Knowledge of Buyer no issue
relating to Buyer or its Affiliates exists that would inhibit Buyer and Seller
from promptly obtaining any material Government Consent.

          Section 4.9 No Other Representations or Warranties. Except for the
representations and warranties contained in this Article IV, neither Buyer nor
any other Person makes any other express or implied representation or warranty
on behalf of Buyer.

                                   ARTICLE V

                                  Tax Matters

          Section 5.1 Liability for Taxes and Related Matters.

          (a) Seller's Indemnification of Buyer. Seller shall be liable for and
shall indemnify Buyer for all Taxes (other than Transfer Taxes, which are
provided for in Section 5.2) (i) attributable to, imposed on, or for which

                                      -41-
<PAGE>

the Companies or any of their respective Subsidiaries may otherwise be liable
for events occurring or periods ending on or before the Closing Date (except for
Tax liabilities attributable to extraordinary events caused by Buyer or any of
its Affiliates (including the Companies and any of their Subsidiaries at any
time after the time of the Closing) occurring outside of the ordinary course of
business on the Closing Date, but after the Closing, and that are not
contemplated by this Agreement), (ii) with respect to any taxable year or period
beginning on or before and ending after the Closing Date, the portion of such
taxable year or period ending on and including the Closing Date (except for Tax
liabilities attributable to extraordinary events caused by Buyer or any of its
Affiliates (including the Companies and any of their Subsidiaries at any time
after the time of the Closing) occurring outside of the ordinary course of
business on the Closing Date, but after the Closing, and that are not
contemplated by this Agreement), and (iii) attributable to any Section
338(h)(10) Election.

          (b) Buyer's Indemnification of Seller. Buyer shall be liable for and
indemnify Seller for the Taxes of the Companies or any of their respective
Subsidiaries for any taxable year or period that begins after the Closing Date
and, with respect to any taxable year or period beginning on or before and
ending after the Closing Date, the portion of such taxable year or period
beginning after the Closing Date. Buyer shall be entitled to any refund of Taxes
of the Companies or any of their respective Subsidiaries received for such
periods. Buyer shall also be liable for and indemnify Seller for any and all Tax
liabilities attributable to extraordinary events caused by Buyer or any of its
Affiliates (including the Companies and any of their Subsidiaries at any time
after the time of the Closing) occurring outside of the ordinary course of
business on the Closing Date, but after the Closing, that are not contemplated
by this Agreement.

          (c) Taxes for Short Taxable Year. For purposes of subsections (a) and
(b) of this Section 5.1, whenever it is necessary to determine the liability for
Taxes of the Companies or any of their Subsidiaries for a portion of a taxable
year or period that begins on or before and ends after the Closing Date, the
determination of the Taxes of the Companies or any of their respective
Subsidiaries for the portion of the year or period ending on, and the portion

                                      -42-
<PAGE>

of the year or period beginning after, the Closing Date generally shall be
determined by assuming that each of the Companies and their Subsidiaries had a
taxable year or period which ended on the Closing Date.

          For purposes of this Section 5.1(c), in the case of any Taxes (other
than Transfer Taxes) that are imposed on a periodic basis and are payable for a
taxable period that includes (but does not end on) the Closing Date, the portion
of such Tax which relates to the portion of such taxable period ending on the
Closing Date shall (x) in the case of any Taxes other than Taxes based upon or
related to income, receipts or the sale or transfer of any property, be deemed
to be the amount of such Tax for the entire taxable period multiplied by a
fraction the numerator of which is the number of days in the taxable period
ending on the Closing Date and the denominator of which is the number of days in
the entire taxable period, and (y) in the case of any Tax based upon or related
to income, receipts or the sale or transfer of any property, be deemed equal to
the amount which would be payable if the relevant taxable period ended on the
Closing Date (except that Tax liabilities attributable to extraordinary events
caused by Buyer or any of its Affiliates (including the Companies and any of
their Subsidiaries at any time after the time of the Closing) occurring outside
of the ordinary course of business on the Closing Date, but after the Closing,
and that are not contemplated by this Agreement shall be borne by Buyer).

          (d) Partnership Subsidiaries. For purposes of subsections (a), (b) and
(c) of this Section 5.1, any liability to indemnify or right to refund with
respect to a Tax imposed on a Subsidiary that is a partnership shall be limited
to the Subsidiary's liability for Taxes or right to refund of Taxes multiplied
by the percentage used to allocate the Subsidiary's taxable income (i) to Seller
and its Affiliates for purposes of subsection (a), and (ii) to Buyer and its
Affiliates for purposes of subsection (b) unless the relevant taxing authority
actually collects additional Taxes from one of the Companies or one of their
Subsidiaries because such Company or Subsidiary is general partner of a
Subsidiary that is a partnership, and such Company or Subsidiary is actually
unable to collect such Taxes from another partner (in which case the liability
of Buyer or Seller, as the case may be, shall not be limited by such
percentage).

                                      -43-
<PAGE>

          (e) Adjustment to Purchase Price. Any payment made to Buyer or Seller
under this Article V will be treated as an adjustment to the Purchase Price.

          (f) Carrybacks. Following the Closing, Buyer and the Companies shall,
to the extent permissible, waive the right to carryback any losses, credits or
similar items attributable to the Companies and from a taxable year or period
that begins after the Closing Date to a taxable year or period that ends on or
before the Closing Date.

          (g) Tax Returns. Seller shall file or cause to be filed when due all
Tax Returns that are required to be filed by or with respect to any of the
Companies or any of their Subsidiaries for taxable years or periods ending on or
before the Closing Date and shall pay any Taxes due in respect of such Tax
Returns. Buyer shall file or cause to be filed when due all Tax Returns that are
required to be filed by or with respect to the Companies or any of their
respective Subsidiaries for taxable years or periods ending after the Closing
Date and shall remit any Taxes due in respect of such Tax Returns. With respect
to any Tax Return required to be filed by Buyer or Seller with respect to the
Company and Subsidiaries and as to which an amount of Tax is allocable to the
other party under Section 5.1(a) or (b) hereof, the filing party shall provide
the other party with a copy of such completed Tax Return and a statement
certifying the amount of Tax shown on such Tax Return that is allocable to such
other party pursuant to the principles of this Section 5.1, together with
appropriate supporting information and schedules, at least 20 Business Days
prior to the due date (including any extension thereof) for the filing of such
Tax Return, or in any event, as soon as practicable, and such other party shall
have the right to review and comment on such Tax Return and statement prior to
the filing of such Tax Return. Tax Returns of the Companies and their
Subsidiaries not yet filed for any taxable period that begins on or before the
Closing Date shall be prepared in a manner consistent with past practices
employed with respect to the Companies and their Subsidiaries, except (x) to the
extent counsel for the filing party determines there is no reasonable basis in
law therefor, (y) to the extent there would be no material adverse consequences
to the non-filing party or its Affiliates, or (z) in the case that the filing
party obtains the non-filing party's prior written consent (which consent shall
not be unreasonably withheld or

                                      -44-
<PAGE>

delayed). Payment by Buyer and Seller of any amounts due under this Article V in
respect of Taxes shall be made (i) at least 10 Business Days before the due date
of the applicable estimated or final Tax Return required to be filed by Buyer
for a period ending after the Closing Date for which Seller is responsible for
Taxes under Section 5.1(a), without regard to whether the Tax Return shows a net
Tax due for such period, and (ii) within 3 Business Days following an agreement
between Buyer and Seller that an indemnity amount is payable, an assessment of a
Tax (which has not been disputed within the prescribed time) by a taxing
authority, or a "determination" as defined in Section 1313(a) of the Code.

          (h) Contest Provisions. (i) Buyer shall promptly notify Seller in
writing upon receipt by Buyer, any of its Affiliates or the Companies or any of
their respective Subsidiaries of written notice of any pending or threatened
federal, state, local or foreign Tax audits, claims for Taxes or assessments
which may affect the Tax liabilities of the Companies or any of their respective
Subsidiaries for which Seller would be required to indemnify Buyer pursuant to
Section 5.1(a) or Section 5.1(i), provided that failure to comply with this
provision shall not affect Buyer's right to indemnification hereunder except to
the extent Seller shall be prejudiced thereby.

               (ii)  Subject to the provisions of Section 5.1(h)(iii), Seller
shall have the sole right to represent the Companies or any of their respective
Subsidiaries' interests in any Tax audit or administrative or court proceeding
relating to taxable periods ending on or before the Closing Date, and to employ
counsel of its choice at its expense.

               (iii) With respect to a proposed adjustment for a period in which
both Seller and Buyer could be liable, (A) each party may participate in the
audit or proceeding, and (B) that portion of the audit or proceeding shall be
controlled by that party which would bear the burden of the greater portion of
the sum of the adjustment and any corresponding adjustments that may reasonably
be anticipated for future taxable periods. The party not controlling such audit
or proceeding may, with the written consent of the other party and at its sole
expense, assume control of such audit or proceeding.

                                      -45-
<PAGE>

               (iv)  Neither Buyer nor Seller shall enter into any compromise or
agree to settle any claim pursuant to any Tax audit or proceeding which would
adversely affect the other party for a particular taxable year without the
written consent of the other party, which consent may not be unreasonably
withheld. Buyer and Seller agree to cooperate, and Buyer agrees to cause the
Company to cooperate, in the defense against or compromise of any claim in any
audit or proceeding.

          (i)  Breach of Article V Representation or Obligation. Each of Buyer
and Seller shall indemnify the other for any Losses, Taxes or loss of Tax
benefits that result from or are attributable to a breach of a representation or
a failure to perform obligations set forth in this Article V. If a liability
under this Article V is in respect of costs or expenses other than Taxes,
payment by Buyer or Seller of any amounts due under this Article V shall be made
within five Business Days after the date when the indemnifying party is notified
by the indemnified party that the indemnified party has a liability for the
determinable amount under this Article V and is provided with calculations or
other materials supporting such liability.

          Section 5.2 Transfer Taxes. Notwithstanding the provisions of Section
5.1, all excise, sales, use, transfer, documentary filing and other similar
Taxes which may be imposed or assessed as a result of Buyer's acquisition of the
Shares ("Transfer Taxes") shall be borne 50% by Buyer and 50% by Seller.

          Section 5.3 Information to be Provided by Buyer. With respect to any
taxable year of the Companies or any of their respective Subsidiaries for which
Seller is required to file a Tax Return pursuant to Section 5.1(g) hereof and
for the period prior to the Closing Date in any taxable year of the Companies or
any of their respective Subsidiaries in which the Closing occurs, Buyer shall
promptly cause the Companies or any of their respective Subsidiaries to prepare
and provide to Seller a package of tax information materials (the "Tax
Package"), which shall be completed in accordance with past practice of the
Companies or the relevant Subsidiary including past practice as to providing the
information, schedules and work papers and as to the method of computation of
separate taxable income or other relevant measure of income. Buyer shall

                                      -46-
<PAGE>

cause the Tax Package for the portion of the taxable period ending on the
Closing Date to be delivered to Seller within one hundred twenty (120) days
after the Closing Date.

          Section 5.4 Assistance and Cooperation. After the Closing Date, each
of Seller and Buyer shall:

          (a) assist (and cause their respective Affiliates to assist) the other
party in preparing any Tax Returns or reports for which such other party is
responsible for preparing and filing in accordance with this Article V;

          (b) cooperate fully in preparing for any audits of, or disputes with
taxing authorities regarding, any Tax Returns of the Companies or any of their
respective Subsidiaries;

          (c) make available to the other party and to any taxing authority as
reasonably requested all information, records, and documents relating to Taxes
of the Companies or any of their respective Subsidiaries;

          (d) provide timely notice to the other party in writing of any pending
or threatened Tax audits or assessments of the Companies or any of their
respective Subsidiaries for taxable periods for which the other may have a
liability under this Article V; and

          (e) furnish the other party with copies of all correspondence received
from any taxing authority in connection with any Tax audit or information
request with respect to any such taxable period.

          Section 5.5 Miscellaneous.

          (a) Any Tax sharing agreement or arrangement to which any of the
Companies or their Subsidiaries are a party (which shall not be construed to
include partnership agreements) shall be terminated as of or prior to the
Closing Date and, after the Closing Date, none of the Companies or any of their
Subsidiaries shall be bound thereby or have any liability thereunder.

          (b) Buyer and Seller agree to consistently treat any transactions
involving the Companies or their respective Subsidiaries that occur on the
Closing Date as properly

                                      -47-
<PAGE>

allocable to Buyer's or Seller's Tax Returns, as the case may be, for all Tax
purposes, consistent with this Article V.

          Section 5.6 Section 338(h)(10); Alternative Transaction Structure.

          (a) Election. Subject to Section 6.19, Seller shall timely make a
joint election with Buyer under Section 338(h)(10) of the Code with respect to
the purchase of the Companies and their Subsidiaries (which are taxed as
corporations for United States Federal Income Tax purposes) and under any
similar provisions of state, local or foreign law (the "Section 338(h)(10)
Election"). If the Section 338(h)(10) Election is made, Seller represents that
its sale of the shares of the Companies and such Subsidiaries is eligible for,
and Buyer represents that it is qualified to make, such Section 338(h)(10)
Election.

          (b) Forms. If a Section 338(h)(10) Election is made or an Alternative
Transaction is effected, Seller and Buyer shall within the later of (i) 150 days
after the Closing Date and (ii) 30 days after the determination of the Post-
Closing Adjustment under Section 2.5 (but, in any event, before the time
required to file any required form) exchange completed and executed copies of
Internal Revenue Service Form 8023 (or any other required form), required
schedules thereto, and any similar state, local and foreign forms. If any
changes are required in these forms as a result of information which is first
available after the Closing Date, the parties will promptly agree on such
changes. If the Section 338(h)(10) Election is made or an Alternative
Transaction is effected, Buyer and Seller shall report, in connection with the
determination of income, franchise, or other Taxes measured by net income, the
transactions being undertaken pursuant to this Agreement in a manner consistent
with the Section 338(h)(10) Election or the Alternative Transaction, as the case
may be (unless otherwise required by Law).

          (c) Allocation of Purchase Price. Seller and Buyer will appoint an
appraiser to determine a purchase price and the allocation of that purchase
price among the assets that (i) are deemed to have been acquired pursuant to
Section 338(h)(10) of the Code or any state or foreign law equivalent or (ii)
are or are deemed to have been acquired

                                      -48-
<PAGE>

in the Alternative Transaction, as the case may be. Buyer and Seller shall use
the asset values determined from such allocation for purposes of all reports and
returns with respect to Taxes, including Internal Revenue Service Form 8594 if
applicable, or any equivalent statement.

          (d) If a Section 338(h)(10) Election is made, or the Alternative
Transaction is effected, Seller shall use its best efforts to ensure that each
entity in which it owns a direct or indirect interest, and which is taxed as a
partnership for United States income tax purposes, will have made an election
under Section 754 of the Code, if such election is not already in effect.

          Section 5.7 Survival of Obligations. The representations and
obligations of the parties set forth in this Article V shall be unconditional
and absolute, and shall survive the Closing until the expiration of the relevant
statute of limitations (including any waivers or extensions thereof) with
respect to such matters and shall expire at such time.

                                  ARTICLE VI

                             Certain Covenants and
                        Agreements of Seller and Buyer

          Section 6.1 Access and Information. (a) Prior to Closing, AMCI and
Seller shall permit Buyer and its representatives to have reasonable access,
during regular business hours and upon reasonable advance notice, to AMCI and
Seller, the Companies and their respective Subsidiaries and to the officers of
AMCI and Seller, the Companies and their respective Subsidiaries for the purpose
of obtaining information about the Business to the extent that such access does
not materially interfere with the business of AMCI, Seller, the Companies or
their Subsidiaries; provided, that Buyer and such representatives comply with
the confidentiality obligations contained herein and in the Confidentiality
Agreement; and provided, further that the foregoing shall not (i) require Seller
to permit any inspection, or to disclose any information, that in its reasonable
judgment would result in any violation of Law or the disclosure of any trade
secrets of third parties or trade secrets of Parent, AMCI or Seller unrelated to
the Companies

                                      -49-
<PAGE>

and their respective Subsidiaries and the Business or violate any of AMCI's,
Seller's, the Companies' (including for this purpose the Excluded Business) or
any of their respective Subsidiaries' obligations with respect to
confidentiality if Seller shall have used reasonable best efforts to obtain, but
shall not have been successful in obtaining, the consent of such third party to
such inspection or disclosure or (ii) require any disclosure by AMCI, Seller,
the Companies (including for this purpose the Excluded Business) or any of their
Subsidiaries that could, as a result of such disclosure, have the effect of
causing the waiver of any attorney-client privilege.

          (b) In the event of the termination of this Agreement, Buyer, at its
own expense, shall promptly, and shall use its reasonable best efforts to cause
its agents to, deliver (without retaining any copies thereof) to Seller, or (at
Seller's option) confirm in writing to Seller that they have destroyed, all
information furnished to Buyer or its representatives or agents by Seller, AMCI,
the Companies (including for this purpose the Excluded Business) or any of their
respective Subsidiaries or any of their respective agents, employees or
representatives as a result hereof or in connection herewith in their
possession, whether so obtained before or after the execution hereof, and all
analyses, compilations, forecasts, studies or other documents prepared by Buyer
or its representatives which contain or reflect any such information. Buyer
shall at all times prior to the Closing Date, and in the event of termination of
this Agreement, cause any information so obtained to be kept confidential and
will not use, or permit the use of, such information in its business or in any
other manner or for any other purpose except as contemplated hereby and except
as required by Law.

          (c) In addition to the confidentiality arrangements contained herein,
all information provided or obtained in connection with the transactions
contemplated by this Agreement (including pursuant to clause (a) above and
clause (e) below) shall be held by Buyer in accordance with and subject to the
terms of the Confidentiality Agreement, dated January 15, 1999, between Buyer
Parent and Parent (the "Confidentiality Agreement"); provided, that from and
after the Closing, Buyer and its Affiliates may use such information in
conducting their business, including for purposes of transition (except to the
extent that such information

                                      -50-
<PAGE>

solely relates to the Excluded Business). In the event of a conflict or
inconsistency between the terms of this Agreement and the Confidentiality
Agreement, the terms of this Agreement shall govern.

          (d) For a period of two years after the Closing Date, Seller agrees
to, and agrees to use reasonable best efforts to cause its agents,
representatives and Affiliates to (i) except as otherwise required by Law, treat
and hold as confidential any information relating to trade secrets, processes,
patent and trademark applications, product development, price, customer and
supplier lists, pricing and marketing plans, policies and strategies, details of
client and consultant contracts, operations methods, product development
techniques, business acquisition plans, new personnel acquisition plans and any
other confidential information relating to the Business, the Companies and each
Subsidiary of the Companies and (ii) not to use any of the confidential
information described above for the purpose of soliciting any customer of or
otherwise competing with the Business. Except as otherwise expressly permitted
by this Agreement or otherwise required by Law, following the termination of the
Transition Services Agreement, Seller agrees to use its reasonable efforts to
return to the Companies or destroy all confidential information referred to
above that exclusively concerns the Business.

          (e) Subject to the provisos set forth in subsection (a) above, prior
to the Closing Date, Seller agrees to keep Buyer reasonably informed, on a
current basis, about significant developments in the business, operations,
assets, liabilities or financial condition of the Companies and their respective
Subsidiaries, other than changes affecting the Commercial Mobile Radio Service
industry generally and changes in the general economic condition of the Missouri
Market. Without limiting the generality of the foregoing, but subject to the
provisos set forth in subsection (a) above, Seller shall, and shall cause the
Companies and their Subsidiaries to (a) deliver to Buyer on a monthly basis
through the Closing Date financial statements for Cybertel Cellular in the
format used to prepare the quarterly financial reports for partners in such
partnership and (b) deliver to Buyer on a monthly basis through the Closing Date
the regularly prepared management reports related to Cybertel RSA provided to
AMCI.

                                      -51-
<PAGE>

          (f) During the period beginning on the date hereof and ending on the
Closing Date, Seller shall cause the Companies and their Subsidiaries to provide
notice to Buyer, if Seller, the Companies or any of their Subsidiaries receive
written notice from any Governmental Entity alleging the material violation of
any applicable Environmental Law which affects the Business or any of its
properties.

          Section 6.2 Conduct of Business. During the period from the date
hereof to the Closing, except (x) as otherwise expressly contemplated by this
Agreement, (y) as set forth on Schedule 6.2, or (z) as Buyer shall otherwise
agree in writing (such agreement not to be unreasonably withheld or delayed),
Seller covenants and agrees that it shall and shall cause the Companies and
their respective Subsidiaries to operate the Business in the ordinary course
consistent with past practice and to use reasonable best efforts to preserve
intact the business and relationships of the Business, the Companies and their
respective Subsidiaries with third parties including distributors, and Seller
shall not (to the extent relating exclusively to the Business) and shall cause
the Companies and their respective Subsidiaries to not:

          (i)   enter into any lease or sublease agreements with an Affiliate
     except with respect to co-location of paging systems in the form provided
     to Buyer by Seller on the date hereof;

          (ii)  sell, lease or otherwise dispose of any capital assets for
     consideration in excess of $500,000 individually or $5,000,000 in the
     aggregate during any twelve month period;

          (iii) except in the ordinary course of business consistent with past
     practice and in an amount not to exceed $1,000,000 in the aggregate, incur
     or assume any indebtedness for borrowed money or guarantee any such
     obligations that is not satisfied prior to Closing;

          (iv)  except as required by Law or any collective bargaining agreement
     or as a result of any change or modification to a Benefit Plan not
     principally related to the Companies or their respective Subsidiaries,
     grant material salary or wage increases, enter into any employment
     contracts, or modify, amend or terminate any

                                      -52-
<PAGE>

     Benefit Plan in any manner that materially increases the amount of the
     liability attributable to the Companies or their Subsidiaries in respect of
     such plan;

          (v)    issue, sell, pledge, dispose of or encumber, repurchase or
     redeem any shares of, or securities convertible into or exchangeable or
     exercisable for, or options, warrants, calls, commitments or rights of any
     kind to acquire any shares of its capital stock or the capital stock or
     other equity interests of its Subsidiaries;

          (vi)   in any material respect amend their respective certificates of
     incorporation, by-laws, partnership agreements or other similar
     organizational documents, except as required pursuant to the terms thereof;

          (vii)  split, combine or reclassify their respective outstanding
     shares of capital stock;

          (viii) merge or consolidate with any other Person or acquire assets of
     any other Person outside of the ordinary course of business with a fair
     market value in excess of $10,000,000 individually or in the aggregate,
     except for any transaction between the Companies and their Subsidiaries;

          (ix)   make any material loan, advance or capital contributions to or
     investments in any Person except for loans, advances or capital
     contributions to or investments in Subsidiaries or other Persons in which
     the Companies or their Subsidiaries hold equity interests or capital
     contributions required under the organizational documents of the
     Subsidiaries or the other Persons in which the Companies or their
     Subsidiaries hold equity interests;

          (x)    (1) enter into any Contract that, if existing on the date
     hereof, would be required to be listed on Schedule 3.18 or Schedule 3.10(a)
     pursuant to clauses (i), (ii), (vii), (xii) or (xiv) of Section 3.10; or
     (2) other than in the ordinary course of business, terminate, cancel, waive
     or fail to exercise rights to renew or extend (a) any Contract which is
     both material and described in (A) Section 3.18

                                      -53-
<PAGE>

     (Affiliate Agreements), if and to the extent such Contract is anticipated,
     pursuant to this Agreement, to be in effect for the benefit of the
     Companies and/or their Subsidiaries following the Closing or (B) clauses
     (i), (ii), (iv), clause (vi) as it relates to leases of cell sites, (vii)
     and (xi) of Section 3.10 or (b) the Contracts listed on Schedule 3.10(a)
     pursuant to clauses (viii) and (ix) of Section 3.10;

     For purposes of this clause (x), any Contract that, in accordance with
     Section 6.7 or Section 6.14, will on or prior to the Closing Date be
     transferred or assigned, in whole or in part, to the Companies, shall, when
     entered into, waived or modified by Seller or an Affiliate of Seller for or
     on behalf of the Companies, be deemed to have been entered into, waived or
     modified by the Companies;

          (xi)   make any material change in accounting policies or procedures,
     other than actions in the ordinary course of business consistent with past
     practice or except as required by GAAP;

          (xii)  pay, loan or advance any amount to, or sell, transfer or lease
     any properties or assets to, or enter into any agreement or arrangement
     with, any of its officers or directors or, if material, to Affiliates
     outside of the ordinary course of business except for directors' fees or
     compensation to officers;

          (xiii) initiate communications with customers of the Business with
     respect to this transaction except as required by Law or in accordance with
     communications plans developed in consultation with Buyer;

          (xiv)  fail to initiate appropriate steps to renew any Communications
     License that is scheduled to terminate within 30 calendar days after the
     Closing Date unless such failure would not be material;

          (xv)   create any material Encumbrance on any material asset other
     than in the ordinary course of business consistent with past practice;

          (xvi)  make any material Tax election or adopt a method of Tax
     accounting that is inconsistent with

                                      -54-
<PAGE>

     elections made or methods used in prior periods that would result in a
     material adverse consequence to Buyer, the Companies or their Subsidiaries
     after the Closing (including without limitation any deferral of income or
     acceleration of Tax benefits); or

          (xvii) authorize or enter into an agreement to do any of the
     foregoing.

Notwithstanding the foregoing in this Section 6.2, to the extent Seller, the
Companies or their Subsidiaries are required to take, or forbear from taking,
any action as a result of (x) conditions imposed on Parent, SBC or any of their
Subsidiaries by any Governmental Entity in connection with the Merger or (y)
fiduciary duties to third parties, and such action or forbearance would
otherwise violate any provision of this Section 6.2, such action or forbearance
shall not be deemed to constitute a breach of Section 6.2 except for purposes of
Article VII. If reasonably practicable, Seller shall provide Buyer with notice
prior to taking or forebearing to take any such action pursuant to the preceding
sentence or, if not practicable, as promptly as reasonably practicable, after
taking or forebearing to take any such action.

          Section 6.3 Registrations, Filings and Consents. (a) AMCI, Seller and
Buyer shall cooperate with each other and use (and shall cause their respective
Subsidiaries to use) all their respective reasonable best efforts to take or
cause to be taken all actions, and do or cause to be done all things, necessary,
proper or advisable on its part under this Agreement and applicable Laws to
consummate and make effective the transactions contemplated by this Agreement as
soon as reasonably practicable, including preparing and filing as promptly as
reasonably practicable all documentation to effect all necessary applications,
notices, petitions, filings and other documents and to obtain as promptly as
reasonably practicable all consents, registrations, approvals, permits and
authorizations necessary or advisable to be obtained from any third party and/or
any Governmental Entity in order to consummate the transactions contemplated by
this Agreement. Seller and Buyer agree to use their respective best efforts to
provide any information requested by any Governmental Entity pursuant to the
Consent Decree. In addition to the foregoing, Seller and Buyer, as applicable,
agree to use their

                                      -55-
<PAGE>

respective best efforts to file promptly and in any event within twenty-five
(25) Business Days following the date of this Agreement (i) in the case of
Buyer, all documentation, filings and other documents necessary to obtain a
Certificate of Convenience and Necessity to enable it to conduct the operations
of the Companies or any of their respective Subsidiaries from and after the
Closing, (ii) the notification and report form, if any, required for the
transactions contemplated by this Agreement and any supplemental information
required in connection therewith pursuant to the HSR Act, and (iii) any required
application, report or other filing or request for approval or notifications
with the FCC and any state regulatory authority from whom consent or clearance
is required to be obtained in connection with the transactions contemplated
hereby; provided, that neither Buyer nor Seller shall be deemed to be in breach
of this Agreement if any such filing is not made within twenty-five (25)
Business Days. Subject to applicable Laws relating to the exchange of
information, Buyer and Seller shall have the right to review in advance, and to
the extent practicable each will consult the other on, all the information
relating to Seller or the Companies or Buyer, as the case may be, and any of
their respective Subsidiaries, that appear in any filing made with, or written
materials submitted to, any third party and/or any Governmental Entity in
connection with the transactions contemplated by this Agreement. In exercising
the foregoing right, each of the Buyer and Seller shall act reasonably and as
promptly as reasonably practicable.

          (b) Buyer and Seller each shall, upon request by the other, furnish
the other with all information concerning itself, its Subsidiaries, directors,
officers and stockholders and such other matters as may be reasonably necessary
or advisable in connection with any statement, filing, notice or application
made by or on behalf of Seller, the Companies, Buyer or any of their respective
Subsidiaries or Affiliates to any third party and/or any Governmental Entity in
connection with the transactions contemplated by this Agreement.

          (c) Buyer and Seller each shall keep the other apprised of the status
of matters relating to completion of the transactions contemplated hereby,
including promptly furnishing the other with copies of notice or other
communications received by Buyer or Seller, as the case may

                                      -56-
<PAGE>

be, the Companies or any of their respective Subsidiaries, from any third party
and/or any Governmental Entity with respect to the transactions contemplated by
this Agreement (other than the Merger).

          (d)  Without limiting the generality of the undertakings pursuant to
this Section 6.3, Seller (in the case of clauses (i) and (iii)) and Buyer (in
all cases set forth below) agree to take or cause to be taken, including by
causing its Affiliates to take, the following actions: (i) provide promptly to
any and all federal, state, local or foreign court or Governmental Entity with
jurisdiction over enforcement of any applicable antitrust laws or
telecommunications laws (each a "Government Regulatory Entity") information and
documents requested by any Government Regulatory Entity or necessary, proper or
advisable to permit consummation of the transactions contemplated by this
Agreement; (ii) the proffer by Buyer of its willingness (w) to sell or otherwise
dispose of, or hold separate and agree to sell or otherwise dispose of, such
interests in overlapping wireless properties as the relevant Government
Regulatory Entity may require or (x) to hold separate its interests in the
Companies and their Subsidiaries pending the sale or other disposition of such
interests in such overlapping wireless properties or another resolution of the
pertinent overlaps satisfactory to the relevant Governmental Entity and, (y) in
the case of either (w) or (x) to accept as conditions to relevant approvals
requirements that it agree in the future to take the steps contemplated by
clauses (w) and (x) above in the event it acquires such interests in such
overlapping wireless properties and, (z) in the case of either (w) or (x) to
accept as conditions to relevant approvals general requirements that it operate
the Business in a vigorous, competitive manner and similar qualitative
conditions (including in each case (w), (x), (y) or (z) above, using reasonable
best efforts to enter into agreements or stipulations with the relevant
Government Regulatory Entity reflecting the foregoing in any such case, no later
than 220 days from the date hereof), if such action(s) shall be reasonably
necessary to obtain any consent required from the relevant Government Regulatory
Entity or to prevent or avoid the commencement of a proceeding to delay,
restrain, enjoin or otherwise prohibit consummation of the transactions
contemplated hereby by any Government Regulatory Entity; and (iii) take
promptly, in the event that any permanent or preliminary injunction or

                                      -57-
<PAGE>

other order is entered or becomes reasonably foreseeable to be entered in any
proceeding that would make consummation of the transactions contemplated by the
terms of this Agreement unlawful or that would prevent or delay consummation of
the transactions contemplated hereby, any and all steps (including the appeal
thereof, the posting of a bond or the taking by Buyer of the steps contemplated
by clause (ii) of this paragraph) necessary to vacate, modify or suspend such
injunction or order so as to permit such consummation on a schedule as close as
possible to that contemplated by this Agreement; provided, that nothing, set
forth in this Section 6.3 shall be deemed to require Seller to take any action
that it concludes in its sole discretion is reasonably likely to materially
reduce the benefits either SBC or Parent expects to realize from the Merger.

          Section 6.4 Employee Benefit Plans. (a) As of the Closing Date, Buyer
shall continue, or shall cause to be continued, the employment of all employees
who are employed by the Companies or any of their Subsidiaries immediately prior
to the Closing Date (the "Transferred Employees") at the same annual base rate
of salary as in effect on the Closing Date. Buyer agrees that, for a period of
at least 12 months following the Closing Date, it shall, or it shall cause the
Companies and their respective Subsidiaries to, provide the Transferred
Employees with employee compensation and benefit plans, programs and policies
that will provide a level of benefits substantially comparable in the aggregate
to the Benefit Plans listed on Schedule 3.14(a) as in effect on the date hereof
for the Transferred Employees. Notwithstanding the above aggregation, Buyer
agrees that it shall cover the Transferred Employees under the Buyer Parent's
standard severance plan for comparable employees for no less than 12 months
following the Closing Date.

          (b)  Transferred Employees shall be given credit for all service with
the Companies, their respective Subsidiaries, Parent and Seller and their
respective Affiliates (including any other service credited for purposes of the
Benefit Plans) under all employee benefits plans, programs and policies of Buyer
in which they become participants, to the extent such service was recognized
under Seller's or its Affiliates' comparable benefit plans, solely for purposes
of eligibility, vesting, vacation entitlement and severance benefits. Buyer
shall cover Transferred Employees in a medical, dental and health plan
maintained by Buyer or any

                                      -58-
<PAGE>

of its Subsidiaries effective as of the Closing Date and Buyer shall cause such
plan to (i) waive any preexisting condition limitations for conditions covered
under the applicable medical, health or dental plans of Parent or its Affiliates
which cover the employees of the Companies and their respective Subsidiaries and
(ii) honor any deductible and out of pocket expenses incurred by such employees
and their beneficiaries under the applicable medical, health or dental plans of
Parent or its Affiliates which cover the employees of the Companies and their
respective Subsidiaries during the portion of such calendar year preceding the
Closing Date. If Transferred Employees become eligible to participate in a group
term life insurance plan maintained by Buyer or any of its Subsidiaries in the
year in which the Closing Date occurs, Buyer shall cause such plan to waive any
medical certification for such employees up to the amount of coverage the
employees had under the life insurance plan of Seller and its Affiliates (but
subject to any limits on the maximum amount of coverage under Buyer's life
insurance plan).

          (c)  Effective as of the Closing Date, Buyer shall take all actions
necessary to cause the defined contribution plan designated by Buyer (the "Buyer
Savings Plan") to permit each Transferred Employee who is a participant in the
Parent Savings Plan for Salaried Employees or the Parent Savings and Security
Plan for Non-Salaried Employees (collectively, the "Seller Savings Plan") as of
the Closing Date to effect a direct rollover of the taxable portion of such
participant's accrued benefits under the Seller Savings Plan to the Buyer
Savings Plan. In connection with any such direct rollover elected by any such
Transferred Employee, Buyer shall allow any such employee's outstanding loan and
related promissory note under the Seller Savings Plan to be directly rolled-over
into the Buyer Savings Plan.

          (d)  Buyer agrees that it shall cause bonus payments to be made to the
bonus-eligible Transferred Employees (as determined by Seller) for performance
in the calendar year in which the Closing occurs, based upon (i) for the portion
of the calendar year through the Closing Date, each eligible Transferred
Employee's total target bonus in effect immediately prior to the Closing Date,
adjusted by reference to the financial performance of Parent, AMCI and/or
Parent's Affiliates, as the case may be, that would have applied to adjust such
Transferred

                                      -59-
<PAGE>

Employee's target bonus had the Transferred Employee remained employed by Seller
or any of its Affiliates through the payment date pro-rated through the Closing
(as directed by Seller) and (ii) for the portion of the calendar year following
the Closing Date, the cash incentive payment determined by Buyer, in its
discretion, provided however, that each bonus-eligible Transferred Employee's
total target bonus for the calendar year in which the Closing occurs shall be no
less than was established by AMCI. Such payments shall be made by Buyer as soon
as practicable after Buyer is informed by AMCI of the bonus amounts or the rate
of payout (e.g., 100% of target, 120% of target, etc.) being paid by AMCI. If
the Closing Date occurs in the calendar year 2000 prior to the date on which the
bonus-eligible Transferred Employees' bonuses based on 1999 performance are
paid, Buyer also agrees that it shall cause bonus payments to be made to each
bonus-eligible Transferred Employee in an amount equal to the bonus payment
which such Transferred Employee would have received had such Transferred
Employee remained employed with Seller or its Affiliates on such payment date.
Such payments shall be made by Buyer as soon as practicable after Buyer is
informed by Seller of the bonus amounts. Seller agrees that the Closing Working
Capital shall reflect the portion of such bonus amounts accrued, solely for
accounting purposes, as of the Closing Date for the Transferred Employees at
target (the "Seller's Accrual"). To the extent that the Seller's Accrual is less
than the sum of (i) the actual amounts payable by Buyer in respect of bonus
payments under this Section 6.4(d) with respect to the calendar year in which
the Closing occurs, divided by 365 and multiplied by the number of days elapsed
in the calendar year in which the Closing occurs through the Closing Date, and
(ii) if the Closing occurs in calendar year 2000, the amount, if any, of any
1999 bonuses not paid prior to the Closing, Seller shall reimburse Buyer for
such shortfall. To the extent that the Seller's Accrual taken into account in
determining Closing Working Capital is in excess of the sum of (i) the actual
amounts payable by Buyer in respect of bonus payments under this Section 6.4(d)
with respect to the calendar year in which the Closing occurs, divided by 365
and multiplied by the number of days in the applicable calendar year in which
the Closing occurs elapsed through the Closing Date, and (ii) if the Closing
occurs in calendar year 2000, the amount, if any, of any 1999 bonuses not paid
prior to the Closing, Buyer shall reimburse Seller for such surplus.

                                      -60-
<PAGE>

          (e)  Seller, AMCI or Parent, as applicable, shall retain sponsorship
of the Benefit Plans following the Closing Date. Following the Closing Date, the
Companies and their respective Subsidiaries shall not be participating employers
in any of the Benefit Plans and shall have no further liabilities with respect
to the Benefit Plans. Except as provided in the financial statements underlying
the Closing Working Capital or Closing Long Term Liabilities, there shall be no
transfer of assets or liabilities with respect to the Benefit Plans. Seller and
its Affiliates shall be responsible for "qualifying events" within the meaning
of Section 603 of ERISA or Section 4980B(f) of the Code that occur on or before
the Closing Date and for any continuation coverage resulting from such
qualifying events.

          (f)  Seller and its Affiliates shall not take or fail to take any
action if such act or failure to act would be reasonably likely to result in a
change in the composition of the employees of the Companies or any of their
respective Subsidiaries outside of the ordinary course of business; provided,
however, that Seller and its Affiliates may not hire any such employee into a
different Affiliate of Seller (including by way of promotion or transfer) if
such action would prevent such employee from becoming a Transferred Employee as
of the Closing Date.

          Section 6.5 Retention of Books and Records. Buyer shall cause the
Companies and their respective Subsidiaries to retain, until all applicable tax
statutes of limitations (including periods of waiver) have expired, all books,
records and other documents pertaining to the Companies and their respective
Subsidiaries that relate to the period prior to the Closing Date that are
required to be retained under current retention policies of Buyer and to make
the same available after the Closing Date for inspection (at an office of the
Companies or any of their respective Affiliates designated by Seller) and
copying by Seller or its agents at Seller's expense, during regular business
hours and upon reasonable request and upon reasonable advance notice. After the
expiration of such period, no such books and records shall be destroyed by Buyer
if Seller has previously requested in writing (with reasonable detail) that such
books and records be preserved. Seller agrees that such records will be kept
strictly confidential and used only for tax or litigation purposes.

                                      -61-
<PAGE>

          Section 6.6 Consent Decree. Buyer acknowledges that the conditions to
the consummation of the transactions contemplated by this Agreement may not be
satisfied or waived at the Effective Time (as defined in the Merger Agreement)
and that the Consent Decree effectively requires Parent in connection with the
consummation of the Merger to transfer the Shares to a Person to hold the Shares
following the Effective Time for the primary purpose of disposing of the Shares
(a "Permitted Shares Transferee"). Buyer agrees that Seller may, subject to
Section 10.4, assign title to the Shares to a Permitted Shares Transferee in
accordance with the terms of the Consent Decree. Buyer acknowledges that it has
been provided with a copy of the Consent Decree and agrees to be bound by the
provisions of Section X thereof as if Buyer were a "defendant" therein. Buyer
agrees that, notwithstanding anything else in this Agreement to the contrary, to
the extent Seller, the Companies or their Subsidiaries are required to take or
forbear from taking, any action in connection with the requirements of the
Consent Decree or to avoid acting in violation of the Consent Decree, and such
action or forbearance would otherwise violate this Agreement, such action or
forbearance shall not be deemed to constitute a violation of this Agreement for
any purpose other than Article VII.

          Section 6.7 Company Assets. On or before the Closing Date, either AMCI
or Seller, as applicable, shall, transfer the assets set forth on Part A of
Schedule 6.7 to the Companies or their Subsidiaries (subject to Section 6.13 in
the case of any Contracts listed thereon).

          Section 6.8 Intellectual Property. Buyer acknowledges and agrees that
nothing in this Agreement grants or shall be deemed to grant to Buyer, the
Companies or their Affiliates any license to, or transfer of ownership interests
in, any patents, copyrights or trade secrets of Parent or any of its Affiliates
other than the Companies and their Subsidiaries.

          Section 6.9 Resignations. Seller shall deliver to Buyer the
resignations of all directors of the Companies and their respective Subsidiaries
from their position as directors of the Companies or their respective
Subsidiaries, as the case may be, at or prior to the Closing Date.

                                      -62-
<PAGE>

          Section 6.10 Partnership Agreements. Until the Closing, Seller agrees
to cause the Companies and their Subsidiaries to comply with the provisions
contained in the organizational documents of the Persons in which the Companies
and their Subsidiaries (including, in the case of the Companies, the
Subsidiaries of the Companies) have a direct or indirect equity interest
(including any provisions relating to transfer restrictions). Each of AMCI and
Seller agrees that it will not, without the consent of Buyer, take any action
not required by Law or the terms of the applicable partnership agreement with
respect to determining or agreeing to the price or other terms for the purchase
of any partnership interest in connection with any change of control. AMCI,
Seller and Buyer further agree that if the transactions contemplated by this
Agreement result in any sale of a partnership interest after the Closing and
Seller or AMCI receives any proceeds in connection with a partner ship interest
owned by Buyer in any Subsidiary of the Companies, then AMCI or Seller, as
applicable, shall deliver any proceeds received in respect of such partnership
interest to Buyer against delivery of the partnership interest to the person
entitled to receive such partnership interest.

          Section 6.11 Litigation. (a) From and after the Closing, Buyer and its
Subsidiaries, on the one hand, and AMCI, Seller and its Subsidiaries on the
other shall give to one another and their respective representatives reasonable
access, during normal business hours and upon reasonable advance notice, to
their Subsidiaries, to their officers, directors and employees and their
respective books and records in connection with all matters arising from, in
connection with or relating to any claim, suit, investigation or proceeding
relating to the business of the Companies or their Subsidiaries and for which
the party seeking information or access may (after the Closing) have any
liability (including liability through indemnification).

          (b)  From and after the Closing, the Companies and their Subsidiaries
will indemnify and hold Seller and its Affiliates harmless against any damages
paid by Seller and its Affiliates to third parties, or any amounts paid by
Seller and its Affiliates to third parties in settlements, which damages were
determined to be owing by a final decision of a court of competent jurisdiction
or which settlement amounts were incurred pursuant to a settlement approved by
Buyer, such approval not to be unreasonably

                                      -63-
<PAGE>

withheld or delayed, if and to the extent that (i) the litigation out of which
such final decision or settlement arose relates to the Business and only to the
extent such damages or other amounts relate to the Business and (ii) Buyer would
not have been entitled to indemnification hereunder if such damages or amount
paid in settlement had been paid by Buyer, the Companies or their Subsidiaries.

          Section 6.12 Certain Transactions. From the date hereof until the
Closing Date, Buyer shall not and shall cause its Affiliates not to enter into
any agreement, arrangement or transaction which would be reasonably likely to
interfere with promptly obtaining all Governmental Consents to the transactions
contemplated hereby.

          Section 6.13 Contracts. (a) Seller and AMCI agree that they shall use
their respective reasonable best efforts, and cause its Subsidiaries to use
their reasonable best efforts, to (i) have the Contracts listed in Part A of
Schedule 6.13 assigned (to the full extent related to the Business) to either of
the Companies or a Subsidiary of one of the Companies on or prior to the Closing
Date and to obtain all consents required for such assignments or enter into a
Contract for the same goods, property or services provided on terms
substantially identical to such Contracts on behalf of one of the Companies or a
Subsidiary of any of the Companies, as applicable, (ii) have either of the
Companies or a Subsidiary of one of the Companies enter into a Contract
substantially similar to those set forth on Part B of Schedule 6.13 (where
applicable, entered into on a basis to proportionately reflect the benefits (and
corresponding obligations) received by either of the Companies or the applicable
Subsidiary as of the time of entry into such Contract) on or before the Closing
Date and (iii) obtain all consents of third parties to any Contracts of the
Companies and their Subsidiaries required in connection with the consummation
of the transactions contemplated by this Agreement and the Ancillary Agreements.
Buyer agrees to use its reasonable best efforts to assist Seller, the Companies
and their Subsidiaries in effecting the transactions described above. Buyer and
Seller acknowledge that in taking the actions described above, payments to
counterparties to certain Contracts may be required. In using their reasonable
best efforts as provided above Buyer and Seller agree that (i) Seller and AMCI
(together) shall be required to pay the first $2,000,000 of any such amounts
paid to third parties and (ii) any such amounts approved by

                                      -64-
<PAGE>

Buyer in excess of $2,000,000, but not to exceed an additional $6,000,000, shall
be paid 50% by Seller and AMCI (together) and 50% by Buyer and for the avoidance
of doubt Seller's and AMCI's aggregate obligation to pay such amounts shall not
exceed $5,000,000 (five million dollars).

          (b)  To the extent the Companies or any of their Subsidiaries are not
parties to any of the Contracts listed on Schedule 6.13 as of the Closing Date
or an alternative arrangement as provided in Section 6.13(a) has not been
established, AMCI agrees at the written request of Buyer to use its reasonable
best efforts to provide the Companies and their Subsidiaries the benefits of
such Contracts pursuant to which the Companies and their Subsidiaries were
provided benefits prior to the Closing Date for a period not to exceed the term
of such Contract, subject to clause (d) below.

          (c)  To the extent any Contract listed or described in Part C of
Schedule 6.13 is not assigned to the Companies or their Subsidiaries, or, where
applicable, a new Contract substantially similar to a Contract set forth on
Schedule 6.13 has not been entered into by the Companies or their Subsidiaries,
on or before the Closing Date, or in either case such Contract is not in full
force and effect without material default thereunder on the Closing Date, AMCI
agrees to indemnify and hold harmless Buyer, the Companies and their
Subsidiaries for 50% of any Losses incurred by them as a result thereof. Any
such non-assignment or failure shall not be a breach of this Agreement for
purposes of Article VII hereof and the foregoing indemnification shall be
Buyer's sole remedy for any failure by AMCI or Seller to obtain any consent to
the assignment of any Contract listed on Schedule 6.13, the assignment of any
such Contract or a replacement for any such Contract in the name of Companies
and their Subsidiaries.

          (d)  From and after the Closing Date, Buyer agrees to assume and
discharge all obligations arising out of or under any Contracts (i) assigned to
the Companies or their Subsidiaries in accordance with this Section 6.13, or
(ii) under which the Companies and the Subsidiaries receive benefits after the
Closing Date pursuant to Section 6.13(b), but in each case only to the extent
such obligations relate to the Business (with an equitable proportionate
allocation made of any obligations under such Contract to the extent they relate
in part to the Business and in part to other

                                      -65-
<PAGE>

businesses of the Seller or its Affiliates), and provided that nothing set forth
herein is intended to modify, as between AMCI and Seller on the one hand, and
Buyer and its Subsidiaries on the other hand, any risk allocation arrangements
set forth elsewhere in this agreement (such as the representations and
warranties and indemnities set forth herein) and for purposes of such
representations, warranties, indemnities and other provisions all Contracts
described in clauses (i) and (ii) hereof shall be deemed to have been assigned
to, or in the name of, the Companies and their Subsidiaries prior to the Closing
Date.

          Section 6.14 Transition Services. On the Closing Date, Buyer and AMCI
shall enter into the Transition Service Agreement in the form of Exhibit A
hereto.

          Section 6.15 Roaming Agreement. On the Closing Date, Buyer and AMCI
shall enter into the Roaming Agreement in the form of Exhibit B hereto.

          Section 6.16 Non-Solicitation. (a) Each of AMCI and Seller agrees for
the eighteen month period beginning on the Closing Date, it shall not, and shall
not permit any of its Affiliates to, directly or indirectly, (i) enter into any
agreements relating to the wireless telephone service business with any
agent/distributor who distributes products or services of the Business
(excluding any reseller of products and services of the Business) in the
Missouri Market as of the date hereof or during the period thereafter and prior
to the Closing Date or otherwise interfere or attempt to interfere with any
relationships or arrangements of the Companies and their Subsidiaries relating
to the Business with such agents, (ii) engage in any solicitation targeted at
resellers of products and services of the Business in the Missouri Market as of
the Closing Date, (iii) except as provided in Section 6.20 (Employee Customers),
engage in any solicitation targeted at customers of the Business as of the date
of this Agreement or during the period thereafter prior to the Closing Date, or
(iv) solicit, hire or employ any Transferred Employees for employment; provided,
however, that this Section 6.16 shall not prevent Seller or any of its
Affiliates from (x) engaging in a general solicitation for customers, or (y)
engaging in a solicitation directed at, or hiring or employing, any Transferred
Employee whose employment has been involuntarily terminated on or after the
Closing Date.

                                      -66-
<PAGE>

          (b)  Each of AMCI and Seller agrees for the eighteen month period
beginning on the Closing Date, it shall not, and shall not permit any of its
Affiliates to, directly or indirectly (i) enter into any Contracts for the
provision inside or outside the Missouri Market of products and services of the
type provided by the Business or for the provision of wireless telephone service
(except that SBC may continue to serve and renew existing Contracts of SBC and
its Subsidiaries with such customers) with any In Market National/Large Accounts
or (ii) enter into any Contracts with other National/Large Accounts providing
for the provision within the Missouri Market of products and services of the
type provided by the Business unless such Contracts have terms and conditions
that retain for the Companies and their Subsidiaries the lines of such customers
(either through arrangements with the Companies or their Subsidiaries or by
using a reseller that, is not affiliated with AMCI or Seller, of the service of
the Companies or their Subsidiaries). Seller, AMCI and Buyer agree that for
National/Large Accounts with lines both inside and outside the Missouri Market
and, if the Chicago and Central Illinois Transaction has been completed, in the
Chicago Market and the Central Illinois Market, they shall cooperate to continue
to provide service to such customers on the same terms as in existing Contracts
(without giving effect to any renewal or extension thereof). On or before the
Closing Date, Seller or AMCI, as the case may be, shall assign or cause to be
assigned to the Companies or their Subsidiaries existing Contracts for the
provision of products and services of the Business with National/Large Accounts
that have lines only in the Missouri Markets or, if the Chicago and Central
Illinois Transaction has been completed, in the Chicago Market and Central
Illinois Market and all other Contracts which include only customers of the
Business with lines only in the Missouri Market (or, if the Chicago and Central
Illinois Transaction has been completed, only such customers and customers with
lines only in the Chicago Market and the Central Illinois Market).

          (c)  Buyer, AMCI and Seller agree that promptly following the date
hereof they shall organize a transition team, chaired by a representative of
Seller and including equal representation of Buyer and Seller, for the purposes
of (i) developing a detailed plan for servicing National/ Large Accounts with a
goal of maximizing revenue retention for such accounts, (ii) developing a plan
to handle the accounts of Business Customers (other than National/Large

                                      -67-
<PAGE>

Accounts) with lines both in the Missouri Market and the Chicago Market and the
Central Illinois Market, on the one hand, and in the remainder of Seller's
wireless telephone service business on the other hand, it being understood that
unless otherwise agreed, lines in the Missouri Market will be assigned to the
Companies or their Subsidiaries and lines outside the Missouri Market will be
retained by Seller and (iii) coordinating the obtaining of vendor and other
third party contracts and consents.

          (d)  Buyer agrees that after the Closing it will cooperate, and cause
the Companies and their Subsidiaries to cooperate, in entering into commercially
reasonable arrangements that will permit Seller and its Affiliates to offer
National/Large Accounts that are not In Market National Large Accounts a package
of services that includes products and services of the type provided by the
Business to the extent necessary to retain lines of customers of the Business as
contemplated in subsection (b)(ii) above.

          Section 6.17 Intercompany Obligations. Buyer acknowledges and Seller
and AMCI agree that not later than the day prior to the Closing Date all
intercompany obligations and agreements between the Companies and their
Subsidiaries, on the one hand, and Seller and its other Affiliates, on the other
hand, shall be settled and/or terminated so that at the close of business on the
day prior to the Closing Date no such intercompany obligations shall remain
outstanding other than those intercompany arrangements set forth in the
Ancillary Agreements, those set forth on Schedule 6.13 and intercompany payables
incurred in the ordinary course and taken into account on the Closing Statement
or in the Closing Long Term Liabilities.

          Section 6.18 Customer Communications and Billing. AMCI agrees that
prior to the Closing Date it shall (A) provide customers of the Business
receiving bundled billing with a notification, in a form approved by Buyer, such
approval not to be unreasonably withheld or delayed, disclosing the possibility
of a transfer of the Business to Buyer and explaining that after the Closing
bills for wireless telephone service charges will be unbundled from bills for
wireline telephone, paging and other services and (B) use reasonable best
efforts to take all actions necessary to be able to send customers of the
Business unbundled bills for wireless telephone services not

                                      -68-
<PAGE>

later than five  business  days after the  Closing  (subject  to normal  billing
cycles).

          Section 6.19 Alternative Transaction Structure. Seller and Buyer agree
that (a) in lieu of making the Section 338(h)(10) Election, Seller may effect,
and cause the Companies and their Subsidiaries to effect, in whole or in part,
one of the alternative transactions set forth in Schedule 6.19(a) (the
"Alternative Transaction") in order to provide Buyer with a "step-up" in tax
basis of the assets (tangible and intangible) equivalent to the step-up that
would have resulted from the Section 338(h)(10) Election (the "Step Up"), (b)
after the Closing Date, Seller shall indemnify and hold harmless Buyer from and
against any and all Losses arising out of or relating to the implementation of
the Alternative Transaction in lieu of making the Section 338(h)(10) Election
(which for these purposes includes the loss of any Tax benefits that would have
resulted from the Step-Up), (c) if the Alternative Transaction is effected, all
representations, warranties, covenants and other agreements and Seller
Disclosure Schedules shall be deemed modified to the extent necessary to
appropriately reflect the Alternative Transaction and the effects thereof, and
(d) if at any time within 90 days after the Closing, Seller determines it is
unable to effectively make the Section 338(h)(10) Election, and cannot or does
not effect the Alternative Transaction, no Section 338(h)(10) Election shall be
made, and the Purchase Price shall be reduced by the aggregate amount of the
"Step-up Tax Loss" incurred by Buyer (as defined below) with respect to the
entity or entities as to which such Step Up is not obtained (such adjustment to
be effected in accordance with Section 2.5(e)) and, if not previously paid
(through a purchase price reduction in accordance with Section 2.5(e)), Seller
shall pay to Buyer the aggregate amount of the purchase price adjustment under
this Section 6.20 together with interest on such amount at the Applicable Rate
calculated on the basis of a year of 360 days for the actual number of days
elapsed, accrued from the Closing Date up to and including the date of payment.
"Step-up Tax Loss" means with respect to any entity the amount set forth for
such entity on Schedule 6.19(b). Seller shall have the right to amend Schedule
6.19(a) to reflect an alternative structure that provides Buyer with an increase
in Tax Benefits attributable to the increase in the Tax basis of such assets
equivalent to the increase in Tax benefits that would have resulted from the
Section 338(h)(10) Election, if Buyer consents to such

                                      -69-
<PAGE>

amendment (which consent shall not be unreasonably withheld or delayed).

          Section 6.20 Employee Customers. Buyer acknowledges and agrees that
notwithstanding any other provision of this Agreement, (a) Parent and each
Affiliate of Parent (other than the Companies and their Subsidiaries), together
with any customer of the Business who is a director or an employee of Seller or
any of its Affiliates or a family member of such director or employee and whose
bills are paid by Parent or any Affiliate of Parent (other than the Companies or
their Subsidiaries) after the Closing will terminate, without penalty, their
purchases of products and services from the Companies and their Subsidiaries and
become customers of the competing business of SBC and (b) any customers of the
Business who are on employee pricing plans of Parent or any Affiliate of Parent
(other than Transferred Employees ultimately employed by Buyer) may receive
targeted solicitations for the provision of products and services that compete
with those offered by the Companies and their Subsidiaries and Seller or its
Affiliates may provide such Persons with products and services.

          Section 6.21 Year 2000 Testing. AMCI agrees that following the date
hereof, AMCI shall cause its Subsidiaries to use reasonable best efforts, to
continue implementing the Y2K Plan in accordance with the terms thereof and
shall provide Buyer with an update on a monthly basis of the implementation
status and testing results.

          Section 6.22 Transition Committees. Buyer, AMCI and Seller agree that
following the date hereof, they shall cooperate with each other and shall take
such actions as are reasonably required or requested for the purpose of
facilitating the occurrence of the following mutually agreed actions at or prior
to the Closing: (i) the transfer of the assets listed on Section 6.7 of the
Seller Disclosure Schedules and the verification of such transfers, (ii) the
implementation of the Transition Services Agreement, and (iii) the establishment
of arrangements designed to provide the Companies and their Subsidiaries with
the categories of services and arrangements and the types of assets set forth on
Schedule 3.20.

          Section 6.23 Prepaid Accounts. As of the Closing, AMCI and Seller
agree that they will have terminated

                                      -70-
<PAGE>

those accounts of prepaid customers of the Business to the extent relating to
the Business who have not used AMCI's or Seller's prepaid cellular service
within the prior six months.

          Section 6.24 Transition Services Revisions. Between the date hereof
and the Closing Date, the Schedules to the Transition Services Agreement may be
revised in accordance with the terms of the form of Transition Services
Agreement.

          Section 6.25 Restriction on Use. Buyer, AMCI and Seller hereby agree
and acknowledge as follows:

          (a) subject to the restrictions set forth in subparts (b) and (c) of
this Section 6.25 (Restriction on Use), no restriction or limitation shall apply
to Seller's and Seller's Affiliate's use of the trademarks, service marks and
logos listed on Exhibit A to the Trademark License Agreement and the trade
dress, brand names, trade names and domain names associated therewith
(collectively, the "Trademarks") in connection with (i) any use of the
Trademarks outside the Missouri Market, (ii) any use of the Trademarks in the
Missouri Market other than in connection with types of business engaged in by
the Business, (iii) any advertising not specifically focused on the types of
business engaged in by the Business, and (iv) any use in conjunction with the
marketing and promotion of services offered as a package by Seller or its
Affiliates (other than services provided by the Business) which include wireless
telephone services offered by SBC and its Affiliates in the Missouri Market.

          (b) For a period beginning on the Closing Date and lasting until the
expiration of thirty months after the Closing Date (the "Initial Period"),
neither AMCI nor Seller will, nor will either permit its respective Affiliates
to, use (or license others to use) the Trademarks in connection with the types
of business engaged in by the Business in the Missouri Market.

          (c) Without limiting the other restrictions set forth in subpart (b)
of Section 6.26, for a period beginning on the day following the expiration of
the Initial Period and ending eighteen months thereafter (the "Subsequent
Period"), neither AMCI nor Seller will, nor will either permit its respective
Affiliates to, use (or license others

                                      -71-
<PAGE>

to use) the Trademarks in connection with the types of business engaged in by
the Business in the Missouri Market; provided, that during the Subsequent Period
Seller and its Affiliates may use "Ameritech" as a modifier of the Southwestern
Bell name used by SBC or its Affiliates in the Missouri Market.

          (d) After the expiration of the Subsequent Period, AMCI, Seller and
their respective Affiliates shall have no limitation or restriction whatsoever
on its use of any of the Trademarks.

          Section 6.26 License. (a) At the Closing, Parent and Buyer shall enter
into the Trademark License Agreement in the form attached hereto as Exhibit C
granting Buyer a non-exclusive, royalty free license to use and authorize others
to use the trademarks, service marks and logos set forth as Exhibit A thereto
(the "Trademarks"), representing all trademarks, service marks and logos used in
the Business and that are the exclusive property of Seller, Parent or one of its
Subsidiaries or that Seller, Parent or one of its Subsidiaries has rights to
license or sublicense to Buyer, for a term that will end on the later of (i) six
months after the effective time of Buyer Parent's business combination with Bell
Atlantic or the termination of the merger agreement with respect thereto or (ii)
one year from the Closing Date, (but in no event later than December 31, 2000)
(the "Transitional Period") in the Markets solely in connection with the
Business. Parent shall also permit Buyer to make use of all trade dress as
presently used by Seller or the Companies in the Business and related to the
Trademarks on the same terms and conditions as are applicable to the Trademarks.
It is the intention of Buyer to transition to a new corporate name ("Newco"),
trademarks, service marks, trade dress and logos (the "New Marks"), for itself
as soon as practicable consistent with its overall corporate branding
strategies.

          (b) Nothing in such license agreement shall be construed to allow
Buyer or any of its Affiliates to use in any manner, including without
limitation, in any corporate communications policy or program, in combination
with the Trademarks either (i) any of Buyer's or its Affiliates existing
corporate names, trademarks, service marks, trade dress or logos ("Existing
Marks"), or (ii) any New Marks; provided that Buyer may use in a manner
consistent with the existing presentation of such Trademark in the Markets and

                                      -72-
<PAGE>

other trade dress "Ameritech Cellular" (and no other Trademarks) in such
combination (the "Permitted Combination") solely to communicate that Buyer or
its Affiliates are changing their corporate name or adopting new marks, in which
event Buyer or its Affiliates may not represent that Newco is the company
formerly known as Ameritech or Ameritech Cellular or any similar formulation;
and, provided further that except as specifically set forth below nothing herein
shall limit any use by Buyer and its Affiliates of Existing Marks or New Marks
in the Markets or elsewhere.

          (c) Unless earlier terminated pursuant to paragraph (a) above, except
as set forth in the last sentence hereof the license granted pursuant to this
Section 6.27, and the License Agreement related hereto, shall terminate on the
date 30 days from the first date on which Buyer or any Affiliate of Buyer uses
or authorizes others to use, and such others do use, any Existing Mark or New
Mark (a) in any Permitted Combination or (b) in connection with the actual
provision of cellular telephone service or products in the Markets. Thereafter,
Buyer shall have a limited right to use, for a period to end as promptly as
reasonably practicable and in no event later than 40 days, the Trademarks to
complete its transition in the Markets to any Existing Mark or New Mark and to
sell off or otherwise utilize existing inventory and remove signage containing
trademarks, but Buyer or any Affiliate of Buyer shall not initiate any new uses
of the Trademarks during such 40-day period.

          (d) In the event of any conflict between this Section 6.26 and the
Trademark License Agreement this Section 6.26 shall control.

          Section 6.27 Expenditures. From the date hereof until the Closing
Date, Seller shall cause the Companies and their Subsidiaries to make
expenditures consistent in all material respects with the Cybertel Cellular
Expenditure Budgets and the Cybertel RSA Pro Forma Expenditure Budgets, as
applicable.

          Section 6.28 System Identification Number. Seller and Buyer shall
cooperate with each other and AMCI shall use (and shall cause its Subsidiaries
to use) all of its reasonable best efforts to change the System Identification
Number ("SID") utilized in that portion of the Excluded Business which operates
in Missouri, to a SID

                                      -73-
<PAGE>

number other than the SID number utilized in the Business (the "SID Change")
within 120 days after the Closing Date. Each of Seller and Buyer shall be
responsible for its costs incurred by it in implementing the SID Change;
provided, that Buyer shall not be required to incur any material costs in
connection with the SID Change.

          Section 6.29 Partnership Interests. On or before the Closing Date,
AMCI shall either (a) transfer all interests it holds in Cybertel RSA to
Cybertel (or to its successor under the Alternative Transaction set forth in
Section 6.19, if applicable) or (b) transfer a portion of the interest it holds
in Cybertel RSA to Cybertel (or to its successor under the Alternative
Transaction set forth in Section 6.19, if applicable) and thereafter cause
Cybertel RSA to distribute the Excluded Businesses to AMCI in redemption of the
remainder of AMCI's interest in Cybertel RSA. As of the Closing Date, Cybertel
and its Subsidiaries shall, taken as a whole, directly or indirectly, own all of
the outstanding equity interests in Cybertel RSA.

          Section 6.30 License for Certain Proprietary Software. To the extent
the proprietary software systems of AMCI set forth on Schedule 6.30 hereof are
(i) used to support the Business and (ii) the exclusive property of AMCI or AMCI
otherwise has rights to sublicense or convey rights to Buyer and its
Subsidiaries, AMCI agrees to grant to the Companies and their Subsidiaries at
the Closing a royalty free, non-exclusive license to use (subject to customary
restrictions that will not impair Buyer's ability to use such systems in the
wireless telephone business of the Companies and their Subsidiaries in the
Missouri Market) such proprietary software systems during the term of the
Transition Services Agreement, but only to the extent such proprietary software
is used to support the wireless telephone business of the Companies and their
Subsidiaries in the Missouri Market, such license to be freely transferrable,
subject to the limitations set forth above, to any successor of Buyer and its
Subsidiaries. At the time such license is granted, no license will be granted to
distribute such proprietary software systems to third parties or to modify or
make derivative works of any proprietary software systems licensed hereunder
other than as required to use such proprietary software systems in the conduct
of the wireless telephone business of the Companies and their Subsidiaries in
the Missouri Market. To the extent any consent from a third party is required to
grant a

                                      -74-
<PAGE>

license or otherwise convey to Buyer and its Subsidiaries a right to use in any
of the systems set forth on Schedule 6.30, such consent will be pursued in
accordance with Section 6.13 and such software license shall be deemed to be
included on Parts B or C of Schedule 6.13 for purposes thereof.

          Section 6.31 Further Assurances. At any time following the Closing
Date, AMCI, Seller and Buyer shall, and Buyer shall cause the Companies or any
of their respective Subsidiaries to, promptly execute, acknowledge and deliver
any other assurances or documents reasonably requested by Buyer or Seller, as
the case may be, and necessary for Buyer, AMCI or Seller, as the case may be, to
satisfy its obligations hereunder or obtain the benefits contemplated hereby.

                                  ARTICLE VII

                             Conditions to Closing

          Section 7.1 Conditions to Each Party's Obligation to Effect the
Transaction. The respective obligations of the parties to consummate the
transactions contemplated hereby is subject to the satisfaction or waiver on or
prior to the Closing Date of each of the following conditions:

          (a) (i) The waiting period, if any, applicable to the consummation of
the transactions contemplated hereby under the HSR Act shall have expired or
been earlier terminated and the DOJ, on behalf of the United States of America,
shall have provided written notice under the Consent Decree that it does not
object to the divestiture of the Companies and their Subsidiaries to Buyer, and
(ii)(A) all notices and other filings required to be made prior to Closing by
Seller or Buyer or any of their respective Subsidiaries, with, and all permits,
authorizations, consents and approvals required to be obtained prior to Closing
by, Seller or Buyer or any of their respective Subsidiaries from, any
Governmental Entity (collectively, together with the Cellular Authorizations,
"Governmental Consents") in connection with the execution and delivery of this
Agreement and the consummation of the transactions contemplated hereby the
failure of which to be made or obtained would be reasonably likely to,
individually or in the aggregate have a Material Adverse Effect or prevent or
materially delay or

                                      -75-
<PAGE>

impair the consummation of the transactions contemplated hereby and (B) the
Cellular Authorizations, in each case shall have been made or obtained (as the
case may be).

          (b) No court or Governmental Entity of competent jurisdiction shall
have enacted, issued, promulgated, enforced or entered any Law (whether
temporary, preliminary or permanent) that is in effect and enjoins or otherwise
prohibits consummation of the transactions contemplated by this Agreement (an
"Order").

          Section 7.2 Conditions to Obligations of Buyer. The obligation of
Buyer to consummate the transactions contemplated by this Agreement is subject
to the satisfaction or waiver by Buyer in writing on or prior to the Closing
Date of each of the following conditions:

          (a) The representations and warranties of Seller contained herein
shall be true and correct as of the Closing as if made as of the Closing Date,
except for such inaccuracies as would not individually or in the aggregate be
reasonably likely to have a Material Adverse Effect (except that representations
and warranties that are made as of a specific date or as of the date hereof need
be true and correct only as of such date), and Buyer shall have received a
certificate to such effect dated the Closing Date and executed by a duly
authorized officer of Seller. For purposes of this Section 7.2, the
representations and warranties of Seller contained in this Agreement shall be
deemed to have been made without any qualification as to knowledge or
materiality and, accordingly, all references in such representations and
warranties to "material," "Material Adverse Effect," "in all material respects,"
"knowledge," "best knowledge" and similar terms and phrases (including dollar
thresholds therein) shall be deemed deleted therefrom;

          (b) SBC shall have provided Buyer with a letter agreement stating that
SBC agrees to be bound after the Closing by the provisions of section 6.16 of
this Agreement applicable to Affiliates of Seller;

          (c) The covenants and agreements of Seller and AMCI to be performed on
or prior to the Closing shall have been duly performed in all material respects,
and Buyer shall have received a certificate to such effect dated the

                                      -76-
<PAGE>

Closing Date and executed by duly authorized officers of Seller and AMCI;

          (d) Buyer shall have received an opinion from inside  counsel to AMCI,
substantially in the form set forth in Exhibit D-1;

          (e) Buyer shall have received an opinion from Skadden, Arps, Slate,
Meagher & Flom LLP, substantially in the form set forth in Exhibit D-2; and

          (f) Parent shall have executed and delivered to Buyer the Trademark
License Agreement, substantially in the form of Exhibit C.

          Section 7.3 Conditions to Obligations of Seller. The obligation of
Seller to consummate the transactions contemplated by this Agreement is subject
to the satisfaction or waiver in writing by Seller on or prior to the Closing
Date of each of the following conditions:

          (a) The representations and warranties of Buyer contained herein shall
have been true and correct in all material respects as of the Closing, as if
made as of the Closing Date (except that representations and warranties that are
made as of a specific date or as of the date hereof need be true in all material
respects only as of such date), and Seller shall have received a certificate to
such effect dated the Closing Date and executed by a duly authorized officer of
Buyer;

          (b) The covenants and agreements of Buyer to be performed on or prior
to the Closing shall have been duly performed in all material respects, and
Seller shall have received a certificate to such effect dated the Closing Date
and executed by a duly authorized officer of Buyer;

          (c) The Effective Time (as defined in the Merger Agreement) shall have
occurred;

          (d) Seller shall have received an opinion from inside counsel to Buyer
Parent in the form set forth in Exhibit E; and

          (e) if the Closing does not occur immediately after the Effective
Time, then either (i) Parent or SBC shall have received a private letter ruling
from the

                                      -77-
<PAGE>

Internal Revenue Service confirming that the Companies and any of their
Subsidiaries which are taxed as corporations for United States federal income
tax purposes are properly includible in the SBC affiliated group, or (ii) 60
days shall have elapsed since the Effective Time.

                                 ARTICLE VIII

                                  Termination

          Section 8.1 Termination. This Agreement may be terminated at any time
prior to the Closing:

          (a) by mutual written agreement of Seller and Buyer; or

          (b) by either Buyer or Seller, by giving written notice of such
termination to the other party, if such other party (including, in the case of
Seller, AMCI) shall breach any of its material obligations or agreements under
this Agreement and such breach shall be incapable of cure or has not been cured
within sixty (60) days following the giving of written notice of such breach to
the breaching party; or

          (c) by either Buyer or Seller, by giving written notice of such
termination to the other party, if any Order permanently enjoining or otherwise
prohibiting consummation of the transactions contemplated hereby shall become
final and non-appealable; or

          (d) by either Buyer or Seller, by giving written notice of such
termination to the other, if any condition to such party's obligations hereunder
has not been satisfied or waived and the Closing shall not have occurred on or
prior to March 31, 2000 (the "Termination Date"); provided, that the terminating
party is not in material breach of its obligations under this Agreement; and;
provided, further, that the Termination Date shall be extended to September 30,
2000 (the "Extended Termination Date") if Seller provides written notice thereof
to Buyer on or prior to March 31, 2000 and on the Termination Date the
transaction under the Merger Agreement shall not have been consummated; or

          (e) by Buyer, by giving written notice of such termination to Seller,
if there has been a breach of the representations and warranties of Seller
contained in this

                                      -78-
<PAGE>

Agreement which (x) would result in the failure of the condition set forth in
Section 7.2(a) (Conditions to Obliga Obligations of Buyer) and (y) cannot be or
is not cured prior to the Termination Date, or, if extended, the Extended
Termination Date; or

          (f) by Seller, by giving written notice of such termination to Buyer,
if there has been a breach of the representations and warranties of Buyer
contained in this Agreement which (x) would result in the failure of the
condition set forth in Section 7.3(a) (Conditions to Obligations of Seller) and
(y) cannot be or is not cured prior to the Termination Date, or, if extended,
the Extended Termination Date; or

          (g) by Seller, by giving written notice of such termination to Buyer,
if the Merger Agreement shall have been terminated.

          Section 8.2 Effect of Termination. In the event of the termination of
this Agreement in accordance with Section 8.1 (Termination) hereof, this
Agreement shall thereafter become void and have no effect, and no party hereto
or its respective Affiliates or their directors, officers, employees or agents
shall have any liability to the other party hereto or their respective
Affiliates, directors, officers or employees, except for the obligations of the
parties hereto contained in this Section 8.2 and in Sections 10.2 (Expenses),
10.3 (Public Disclosure) 10.11 (Notices), 10.12 (Governing Law) and 10.13
(Waiver of Jury Trial) hereof, and except that nothing herein will relieve any
party from liability for any breach of this Agreement prior to such termination.

                                  ARTICLE IX

                         Survival And Indemnification

          Section 9.1 Survival of Representations, Warranties, Covenants and
Agreements. The representations and warranties included or provided for (x) in
Sections 3.5 through 3.11, and Sections 3.16 (except for the last sentence of
Section 3.16 (Property and Leases) referred to in (bb) below) through Section
3.20, and Section 3.22 (Service Marks) Section 4.2 and Sections 4.4, 4.6 and 4.8
herein shall survive the Closing until the 120th day

                                      -79-
<PAGE>

following the end of the first full calendar year after the Closing, (y) in
Section 3.12 (Tax Matters) herein shall survive the Closing until the expiration
of the applicable statute of limitations (including any waivers or extensions
thereof) with respect to such matters and shall expire at such time, (z) in
Sections 3.13 (Labor Matters), 3.14 (Employee Benefits) and 3.15 (Environmental
Matters) shall survive the Closing until the fourth anniversary of the Closing
Date and shall expire at such time, (aa) in Sections 3.1 (Organization and
Authority of Seller), 3.2 (Organization and Qualification of the Companies), 3.3
(Capitalization of the Companies), 3.4 (Subsidiaries of the Companies), 3.21
(Brokers and Finders), 3.23 (No Other Representations and Warranties), 4.1
(Organization and Authority of Buyer), 4.3 (Brokers and Finders), 4.5
(Securities Act), 4.7 (Investigation by Buyer) and 4.9 (No Other Representations
and Warranties) shall have no expiration date and (bb) in the last sentence of
Section 3.16 (Property and Leases) shall survive the Closing until the 180th day
following the Closing. In the event that any Claim Notice or any other written
notice of a claim shall be given hereunder within the applicable survival
period, the representations and warranties that are the subject of such
indemnity claim shall survive until such claim is finally resolved. The
covenants and other agreements contained in this Agreement shall survive the
Closing until the date or dates specified therein or the expiration of the
applicable statute of limitations (including any waivers or extensions thereof)
with respect to such matters, whichever is later. Except with respect to the
representations and warranties contained in Sections 3.21 (Brokers and Finders),
3.3 (Capitalization of the Companies), 3.4 (Subsidiaries of the Companies;
Minority Interests), 3.12 (Tax Matters) and 3.20 (Ability to Conduct Business),
in no event shall Seller be liable to Buyer for any breach of the
representations or warranties included or provided for herein or in any other
document delivered pursuant to this Agreement, unless and until all claims for
which Losses are recoverable by Buyer exceed $7,200,000 (seven million two
hundred thousand dollars) (the "Deductible") and Seller shall be liable only for
the amount by which all such recoverable Losses exceed the Deductible. In
addition, (x) except for breaches of (1) Sections 3.3 (Capitalization of the
Companies), 3.4 (Subsidiaries of the Companies) and 3.21 (Brokers and Finders),
(2) breaches of covenants and indemnities outside this Article IX and (3) the
special indemnity under clauses 9.3(a)(ii), 9.3(a)(iii), 9.3(a)(iv) and
9.3(a)(v) for which

                                      -80-
<PAGE>

there shall be no limit, any payments under this Article IX by Seller to Buyer
for Losses shall not exceed in the aggregate $180,000,000 (one hundred eighty
million dollars) (the "Limit").

          Section 9.2 Indemnification by Buyer. (a) For the period commencing on
the Closing Date and ending, as the case may be, upon the expiration of the
periods specified in Section 9.1 (Survival of Representations, Warranties,
Covenants and Agreements) hereof (if applicable), Buyer shall indemnify, defend
and hold harmless Seller and its Affiliates, and their respective directors,
officers, employees, shareholders and agents ("Seller Indemnified Parties")
against and in respect of all losses, damages (excluding punitive and
consequential damages, other than those claimed by third parties and actual non-
speculative lost profits of the Companies and their Subsidiaries), liabilities,
costs and expenses (including reasonable attorneys' fees and expenses incurred
in investigating, preparing or defending any claims covered hereby)
(collectively, "Losses") sustained or incurred arising out of, in connection
with or relating to any breaches of Buyer's representations and warranties set
forth in this Agreement (other than representations and warranties set forth in
Article V, as to which the indemnification provisions set forth in Article V
shall govern).

          (b) Any payments pursuant to this Section 9.2 or Article V shall be
treated as an adjustment to the Purchase Price.

          Section 9.3 Indemnification by Seller. (a) For the period commencing
on the Closing Date and ending, as the case may be, upon the expiration of the
periods specified in Section 9.1 (Survival of Representations, Warranties,
Covenants and Agreements) hereof (if applicable), Seller shall, subject to the
limitations set forth in Section 9.1 (Survival of Representations, Warranties,
Covenants and Agreements) hereof, indemnify, defend and hold harmless Buyer and
its respective directors, officers, employees, shareholders and agents ("Buyer
Indemnified Parties" and, collectively with the Seller Indemnified Parties, the
"Indemnified Parties") against and in respect of (i) all Losses sustained,
incurred, arising out of, in connection with or relating to any breaches of
Seller's representations and warranties set forth in this Agreement (other than
representations and warranties set forth in Article V (Tax

                                      -81-
<PAGE>

Matters), as to which the indemnification provisions set forth in Article V (Tax
Matters) shall govern), (ii) Losses arising out of or relating to the matters
set forth on Schedule 9.3 to the extent set forth thereon, (iii) all Losses
incurred in connection with litigation that was omitted from the Schedules
hereto in breach of the representations set forth in Section 3.8 (Litigation)
hereof and (iv) all Losses to the extent relating to any assets, properties or
businesses of the Companies and their Subsidiaries transferred or to be
transferred to Seller or any of its Affiliates (other than the Companies and
their Subsidiaries), in connection with the transactions contemplated hereby on
or prior to the Closing Date.

          (b)  In addition to the foregoing, and without regard to and without
being counted in calculating the Deductible, but to be included in determining
if the Limit has been reached, from and after the Closing Seller shall
indemnify, defend and hold harmless the Buyer Indemnified Parties against and in
respect of fifty percent (50%) of all Losses in excess of $5 million per
Qualifying Customer Litigation (as defined below). A "Qualifying Customer
Litigation" is a case or group of consolidated cases with substantially
identical claims brought by customers of both the Business and customers of
similar businesses of Seller to the extent relating to the conduct of the
Business prior to the Closing Date and filed with a Court after the date hereof
and prior to the third anniversary of the Closing Date. For purposes of this
Section 9.3(b), any case filed against Seller or its Affiliates before the date
hereof which does not currently name or involve the Companies or their
Subsidiaries or the Business, but subsequent to the date hereof, is modified so
that it does name or involve the Companies or their Subsidiaries or the
Business, shall be deemed to have been filed after the date hereof. Except as
specifically provided in this Agreement, Seller shall have no liability to Buyer
with respect to any Losses to the extent relating or arising out of the conduct
of the Business on or after the Closing Date.

          (c)  No indemnity shall be recoverable by the Buyer Indemnified
Parties with respect to any matter to the extent such matter was reflected in
the final calculation of the adjustment to the Purchase Price, if any, pursuant
to Article II and any Losses related thereto to the extent reflected in the
final calculation of the adjustment to the

                                      -82-
<PAGE>

Purchase Price shall not be counted in determining if the Deductible has been
satisfied.

          (d)  Any payments pursuant to this Section 9.3 or Article V (Tax
Matters) shall be treated as an adjustment to the Purchase Price.

          Section 9.4 Indemnification as Sole Remedy. Following the Closing, the
indemnities provided in Article V (Tax Matters), this Article IX and Article VI
shall be the sole and exclusive remedy of the parties hereto, their Affiliates,
successors and assigns with respect to any and all claims for Losses sustained
or incurred arising out of, in connection with or relating to this Agreement and
the transactions contemplated by this Agreement, except for damages for breach
of any covenants or agreements set forth in this Agreement or any of the other
agreements contemplated hereby or for the right of the parties hereto to seek
specific performance of the obligations set forth herein.

          Section 9.5 Method of Asserting Claims, Etc. (a) Except as provided in
Article V with respect to matters related to Taxes and as set forth in paragraph
(b) below, all claims for indemnification by the Indemnified Party hereunder
with respect to third-party claims shall be asserted and resolved as set forth
in this Section 9.5(a). In the event that any written claim or demand for which
Seller or Buyer, as the case may be (in such capacity, an "Indemnifying Party"),
may be liable to any Indemnified Party hereunder is asserted against or sought
to be collected from any Indemnified Party by a third party, such Indemnified
Party shall promptly, but in no event later than 15 days following such
Indemnified Party's receipt of such claim or demand, notify in writing the
Indemnifying Party of such claim or demand and the amount or the estimated
amount thereof to the extent then feasible (which estimate shall not be
conclusive of the final amount of such claim or demand) (the "Claim Notice").
The Indemnifying Party shall (i) have no liability with respect to any expenses
incurred by the Indemnified Party with respect to the relevant third-party
claims prior to the time the Claim Notice is delivered to the Indemnifying Party
and such expenses shall be deemed not to be Losses of the Indemnified Party and
(ii) be relieved of its obligations to indemnify the Indemnified Party with
respect to such claim or demand if the Indemnified Party fails to timely deliver
the Claim Notice,

                                      -83-
<PAGE>

but only to the extent the Indemnifying Party is prejudiced thereby. The
Indemnifying Party shall have 30 days from the personal delivery or mailing of
the Claim Notice, whichever is later, (the "Notice Period") to notify the
Indemnified Party whether or not it desires to defend the Indemnified Party
against such claim or demand and shall during the Notice Period and thereafter
be provided by the Indemnified Party with such information relating to the claim
or demand as the Indemnifying Party shall request. All costs and expenses
incurred by the Indemnifying Party in defending such claim or demand shall be
borne by the Indemnifying Party. Except as hereinafter provided, in the event
that the Indemnifying Party notifies the Indemnified Party within the Notice
Period that it desires to defend the Indemnified Party against such claim or
demand, the Indemnifying Party shall have the sole power to direct and control
such defense. If the Indemnifying Party so elects to assume the defense of such
claim, the Indemnifying Party shall not be liable to the Indemnified Party for
any legal expenses subsequently incurred by the Indemnified Party. If any
Indemnified Party desires to participate in, but not control, any such defense
it may do so at its sole cost and expense; provided that in any action seeking
an injunction or decree which would restrict the future activity or conduct of
the Indemnified Party or any Subsidiary or Affiliate thereof, the Indemnified
Party shall be entitled to participate in the defense of such action at the
expense of the Indemnifying Party. The Indemnified Party shall not settle,
compromise or discharge a claim or demand for which it is indemnified by the
Indemnifying Party or admit to any liability with respect to such claim or
demand without the prior written consent of the Indemnifying Party (which
consent shall not be unreasonably withheld). The Indemnifying Party shall not,
without the written consent of the Indemnified Party (which consent shall not be
unreasonably withheld), settle, compromise or offer to settle or compromise any
such claim or demand on a basis which would result in the imposition of a
consent order, injunction or decree which would restrict the future activity or
conduct of the Indemnified Party or any Subsidiary or Affiliate thereof. To the
extent the Indemnifying Party shall direct, control or participate in the
defense or settlement of any third party claim or demand, the Indemnified Party
will provide the Indemnifying Party and its counsel access to all relevant
business records and other documents, and shall use its reasonable best efforts
to assist, and to cause the employees and counsel of the

                                      -84-
<PAGE>

Indemnified Party to assist, in defense of such claim. If the Indemnifying Party
elects not to defend the Indemnified Party, the Indemnified Party shall have the
right to defend the claim or demand by appropriate proceedings and shall have
the sole power to direct and control such defense. In any event, the
Indemnifying Party shall have the right to participate in the defense or
settlement of any third party claim or demand for which the Indemnifying Party
may be liable hereunder at its own expense.

          (b)   All claims for indemnification by Seller or Buyer with respect
to litigation for which the party seeking indemnification is indemnified solely
pursuant to one or more of Sections 6.11(b), 9.3(a)(ii) or 9.3(b), and the
defense of the relevant litigation, shall be handled as contemplated in this
Section 9.5(b). Upon receipt of a summons and complaint or other notice (which
is also filed with a Court) of any such litigation from which it may be
reasonably inferred that the other party may be entitled to or required to be
provided indemnification hereunder, the receiving party shall promptly notify
the other.

          (i)  If and for so long as the particular litigation is of the type
     described in Section 9.3(a)(ii) or 9.3(b) (without reference to the three
     year limitation set forth therein) or of a type described under Section
     6.11(b) in which the parties otherwise each have financial exposure not
     fully covered by indemnification from the other party (without regard to
     caps and deductibles), Buyer and Seller shall each retain their own counsel
     and participate in the defense thereof and shall cooperate with one another
     in the course thereof. In any such litigation, neither party shall enter
     into a settlement adversely affecting the liability of the other without
     the consent of the other, which consent shall not be unreasonably withheld
     or delayed.

          (ii) If and for so long as the particular litigation is one in which
     only one party has a financial exposure not covered by indemnification from
     the other party, then the party having such exposure shall defend and
     control the defense of such litigation. With respect to the particular
     cases set forth on Schedule 3.8 that relate exclusively to the Business
     (that are not also set forth on Schedule 9(a)(ii)) (the "Schedule 3.8
     Cases"), on the Closing

                                      -85-
<PAGE>

     Date Buyer agrees to assume, and Seller agrees to transfer to Buyer, the
     defense thereof in accordance with this clause (ii), and Buyer shall
     control such cases, provided, that, Buyer agrees to continue to utilize the
     same outside counsel as are presently responsible for such cases unless it
     reasonably determines such continuing representation is inadvisable. Buyer
     agrees that any counsel selected to defend the Schedule 3.8 cases
     controlled by Buyer shall be reasonably acceptable to Seller.

          (iii) In all cases the parties shall cooperate with each other by
     providing access to relevant employees and business records and otherwise
     as contemplated by Section 9.5(a).

          (c)  In determining the amount of Losses sustained or incurred by
Buyer for purposes of the indemnification under Sections 9.3(a)(ii) or 9.3(b),
Promotional Items constituting a portion of a Loss shall be deemed to be a Loss
only to the extent of the actual cost to Buyer or its Affiliates of providing
any such Promotional Item and such Losses shall be offset by any actual profits
realized in providing such Promotional Items. For such purposes, the actual cost
shall be deemed to be the actual cost of providing the good or service
constituting the Promotional Item on a fully allocated basis to the Companies
and their Subsidiaries and shall not be deemed to include any lost profit or
mark-up which might be obtained if such service or product was sold to a
customer of the Companies or their Subsidiaries. For purposes of this Section
9.5(c) "Promotional Items" shall be deemed to include all non-monetary items
provided in settlement of any claim or as the result of an adjudication of any
litigation and shall be deemed to include services such as certificates for free
minutes of use, discounts on minutes of use, discounts on handsets, discounts on
other products sold by Buyer or its Affiliates and other products, goods,
services or rights to obtain any products, goods or services.

          Section 9.6 Calculation of Losses. The amount of any Losses payable by
the Indemnifying Party to the Indemnified Party shall take into account any (i)
amounts recovered or recoverable by the Indemnified Party under applicable
insurance policies (with third party carriers), (ii) Tax cost incurred by the
Indemnified Party arising from the receipt of indemnity payments and (iii) Tax
benefit

                                      -86-
<PAGE>

actually realized by the Indemnified Party arising from the incurrence or
payment of any such Loss.

          Section 9.7 Assignment of Claims. If the Indemnified Party receives
any payment from an Indemnifying Party in respect of any Losses and the
Indemnified Party could have recovered all or a part of such Losses from a third
party (a "Potential Contributor") based on the underlying claim or demand
asserted against the Indemnifying Party, the Indemnified Party shall, to the
extent permitted by Law or any applicable contractual arrangement, assign such
of its rights to proceed against the Potential Contributor as are necessary to
permit the Indemnifying Party to recover from the Potential Contributor the
amount of such payment.

          Section 9.8 Overlapping Provisions. Except as provided in the last
sentence of Section 3.15, in the parenthetical at the end of clause (i) in the
last sentence of Section 9.3(a) or in the last sentence of Section 6.13(c),
where (i) more than one representation in this Agreement is breached or
otherwise rendered inaccurate or incomplete by virtue of an event or occurrence;
(ii) more than one covenant or other provision hereunder is breached or violated
by a party's action or failure to act; or (iii) more than one indemnification
provision herein is by its terms applicable to any litigation, event,
occurrence, action, failure to act or other breach, the party seeking
indemnification or another remedy hereunder shall be entitled to proceed under
any applicable provision hereunder, and to obtain any indemnification or remedy
available thereunder, regardless of whether the indemnification or remedy
available thereunder would not have been available, or would have been available
to a lesser extent or in a lesser amount, under another provision relating
thereto. No party shall be entitled under this Section 9.8 or any other
provision of this Agreement to obtain duplicative indemnification or remedies.

                                      -87-
<PAGE>

                                   ARTICLE X

                                 Miscellaneous

          Section 10.1 Amendment and Waiver. Any provision of this Agreement may
be amended or waived if, and only if, such amendment or waiver is in writing and
signed, in the case of an amendment, by Seller and Buyer, or in the case of a
waiver, by the party against whom the waiver is to be effective. No failure or
delay by any party in exercising any right, power or privilege hereunder shall
operate as a waiver thereof nor shall any single or partial exercise thereof
preclude any other or further exercise thereof or the exercise of any other
right, power or privilege.

          Section 10.2 Expenses. Except as otherwise expressly provided in this
Agreement, whether or not the transactions contemplated by this Agreement are
consummated, the parties shall bear their own respective expenses (including,
but not limited to, all compensation and expenses of counsel, financial
advisors, consultants, actuaries and independent accountants) incurred in
connection with this Agreement and the transactions contemplated hereby.

          Section 10.3 Public Disclosure. The parties to this Agreement hereby
agree with the other party hereto that, except as may be required to comply with
the requirements of applicable Law or the rules and regulations of any national
securities exchange upon which the securities of one of the parties or its
Affiliates is listed, no press release or similar public announcement or
communication will be made or caused to be made concerning the execution or
performance of this Agreement unless specifically approved in advance by all
parties hereto; provided, however, that to the extent that either party to this
Agreement is required by Law or the rules and regulations of any stock exchange
upon which the securities of one or more of the parties or its Affiliates is
listed to make such a public disclosure, such public disclosure shall only be
made after prior consultation with the other party to this Agreement, if
consultation is reasonably practicable.

          Section 10.4 Assignment. No party to this Agreement may assign any of
its rights or obligations under this Agreement without the prior written consent
of the

                                      -88-
<PAGE>

other party hereto; provided, that Seller shall be entitled to assign its
obligations under this agreement to any Permitted Share Transferee so long as
such Permitted Share Transferee agrees to be bound by all of the terms and
conditions of this Agreement (and shall thereafter be "Seller" and "AMCI" for
all purposes of this Agreement) and Seller and AMCI each agree to remain liable
as guarantor of the Permitted Share Transferee, and Buyer may assign any of its
rights hereunder to any Affiliate so long as (i) Buyer remains obligated to
perform or agrees to unconditionally guarantee performance of any obligations of
Buyer hereunder through the Closing Date and (ii) such assignment does not delay
receipt of any Governmental Consents or third party consents that are a
condition to completion of the transactions contemplated by this Agreement.

          Section 10.5 Entire Agreement. This Agreement, the Ancillary
Agreements, the Trademark License Agreement and the Chicago and Central Illinois
Stock Purchase Agreement (including all Annexes and Schedules hereto) contains
the entire agreement between the parties hereto with respect to the subject
matter hereof and supersedes all prior agreements and understandings, oral or
written, with respect to such matters, except for the Confidentiality Agreement
which will remain in full force and effect for the term provided for therein.

          Section 10.6 Fulfillment of Obligations. Any obligation of any party
to any other party under this Agreement, which obligation is performed,
satisfied or fulfilled by an Affiliate of such party, shall be deemed to have
been performed, satisfied or fulfilled by such party.

          Section 10.7 Parties in Interest; No Third Party Beneficiaries. This
Agreement shall inure to the benefit of and be binding upon the parties hereto
and their respective successors and permitted assigns. Nothing in this
Agreement, express or implied, is intended to confer upon any Person other than
Buyer, Seller or their successors, any rights or remedies under or by reason of
this Agreement.

          Section 10.8 Guarantees. Buyer Parent hereby unconditionally
guarantees performance of Buyer's obligations hereunder and payment of damages
or liabilities which Buyer may be obligated to pay in connection with a breach
of this Agreement on or prior to the Closing Date. AMCI hereby (i)
unconditionally guarantees performance of Seller's

                                      -89-
<PAGE>

obligations hereunder (including, without limitation all indemnification
obligations of Seller hereunder and payment of damages or liabilities which
Seller may be obligated to pay in connection with a breach of this Agreement,
and (ii) without limiting the generality of the payment and performance
guarantee under clause (i) agrees to be bound by the covenants set forth in
Articles V and VI herein, but only to the extent Seller is bound by such
provisions, as though each reference to "Seller" therein included a reference to
AMCI and no implication to the contrary should be drawn by the fact that certain
provisions contain specific reference to AMCI while others do not. AMCI's
obligations under this Section 10.8 shall survive the Closing; provided, that
nothing set forth in this Section 10.8 shall be deemed to extend the duration of
time applicable to any provision set forth in this Agreement.

          Section 10.9 Counterparts. This Agreement and any amendments hereto
may be executed in one or more counterparts, each of which shall be deemed to be
an original by the parties executing such counterpart, but all of which shall be
considered one and the same instrument.

          Section 10.10 Section Headings. The section and paragraph headings and
table of contents contained in this Agreement are for reference purposes only
and shall not in any way affect the meaning or interpretation of this Agreement.

          Section 10.11 Notices. All notices or other communications hereunder
shall be deemed to have been duly given and made if in writing and if served by
personal delivery upon the party for whom it is intended, if delivered by
registered or certified mail, return receipt requested, or by a national courier
service, or if sent by facsimile; provided that the facsimile is promptly
confirmed by written confirmation by registered mail thereof, to the person at
the address set forth below, or such other address as may be designated in
writing hereafter, in the same manner, by such person:

                                      -90-
<PAGE>

               (a)  if to Seller or AMCI, to:

                    Ameritech Mobile Communications, Inc.
                    c/o Ameritech Corporation
                    30 South Wacker Drive
                    Chicago, Illinois 60606
                    facsimile: (312) 609-6307

                    Attention: Assistant General
                               Counsel - Transactions

               With a copy to:

                    Sullivan & Cromwell
                    125 Broad Street
                    New York, New York 10004
                    facsimile: (212) 558-3588

                    Attention: Joseph B. Frumkin

               and to:

                    Skadden, Arps, Slate, Meagher & Flom
                    (Illinois)
                    333 West Wacker Drive
                    Chicago, Illinois 60606
                    facsimile: (312) 407-0411
                    Attention: Charles Mulaney

               (b)  if to Buyer, to:

                    GTE Consumer Services Incorporated
                    1255 Corporate Drive
                    Irving, Texas 75038-2518
                    facsimile: (972) 507-2322

                    Attention: James A. Attwood

               With a copy to:

                    O'Melveny & Myers LLP
                    153 East 53rd Street
                    New York, New York 10022
                    facsimile: (212) 326-2061

                    Attention: Jeffrey J. Rosen

                                      -91-
<PAGE>

               (c)  if to Buyer Parent:

                    GTE Corporation
                    1255 Corporate Drive
                    Irving, Texas 75038-2518
                    facsimile: (972) 507-2322

                    Attention: James A. Attwood

Any notice given by mail shall be effective when received.

          SECTION 10.12 GOVERNING LAW; SUBMISSION TO JURISDICTION; SELECTION OF
FORUM. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH,
THE LAWS OF THE STATE OF NEW YORK WITHOUT REFERENCE TO THE CHOICE OF LAW
PRINCIPLES THEREOF. EACH PARTY HERETO AGREES THAT IT SHALL BRING ANY ACTION OR
PROCEEDING IN RESPECT OF ANY CLAIM ARISING OUT OF OR RELATED TO THIS AGREEMENT
OR THE TRANSACTIONS CONTAINED IN OR CONTEMPLATED BY THIS AGREEMENT, WHETHER IN
TORT OR CONTRACT OR AT LAW OR IN EQUITY, EXCLUSIVELY IN THE UNITED STATES
DISTRICT COURT FOR THE SOUTHERN DISTRICT OF NEW YORK OR THE SUPREME COURT OF THE
STATE OF NEW YORK FOR THE COUNTY OF NEW YORK (THE "CHOSEN COURTS") AND (I)
IRREVOCABLY SUBMITS TO THE EXCLUSIVE JURISDICTION OF THE CHOSEN COURTS, (II)
WAIVES ANY OBJECTION TO LAYING VENUE IN ANY SUCH ACTION OR PROCEEDING IN THE
CHOSEN COURTS, (III) WAIVES ANY OBJECTION THAT THE CHOSEN COURTS ARE AN
INCONVENIENT FORUM OR DO NOT HAVE JURISDICTION OVER ANY PARTY HERETO AND (IV)
AGREES THAT SERVICE OF PROCESS UPON SUCH PARTY IN ANY SUCH ACTION OR PROCEEDING
SHALL BE EFFECTIVE IF NOTICE IS GIVEN IN ACCORDANCE WITH SECTION 10.11 OF THIS
AGREEMENT.

          SECTION 10.13 WAIVER OF JURY TRIAL. THE PARTIES HERETO HEREBY
IRREVOCABLY WAIVE ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING
ARISING OUT OF OR RELATED TO THE AGREEMENT OR THE TRANSACTIONS CONTEMPLATED
HEREBY.

          Section 10.14 Certain Constructions. Except as set forth in 3.5(a) or
otherwise expressly provided in this Agreement, for purposes of the
representations, warranties and covenants of Seller and AMCI contained herein,
the references to the terms "Companies" and "Cybertel" shall be deemed to
exclude the Excluded Business.

                                      -92-
<PAGE>

          Section 10.15 Severability. The provisions of this Agreement shall be
deemed severable and the invalidity or unenforceability of any provision shall
not affect the validity or enforceability of the other provisions hereof unless
such invalidity or unenforceability, after taking into account the mitigation
contemplated by the next sentence, deprives a party of a material benefit contem
plated by this Agreement. If any provision of this Agreement, or the application
thereof to any Person or any circumstance, is invalid or unenforceable, (a) a
suitable and equitable provision shall be substituted therefor in order to carry
out, so far as may be valid and enforceable, the intent and purpose of such
invalid or unenforceable provision and (b) the remainder of this Agreement and
the application of such provision to other persons, entities or circumstances
shall not be affected by such invalidity or unenforceability, nor shall such
invalidity or unenforce ability affect the validity or enforceability of such
provision, or the application thereof, in any other jurisdiction.

                                      -93-
<PAGE>

          IN WITNESS WHEREOF, this Agreement has been signed on behalf of each
of the parties hereto as of the date first written above.

                      AMERITECH

                      By: /s/ Richard C. Notebaert
                          -----------------------------------
                          Name:  Richard C. Notebaert
                          Title: Chairman of the Board,
                                 President and CEO of Ameritech Corporation
                                 the Sole Shareholder of
                                 Ameritech Mobile Communications, Inc.

                      GTE CONSUMER SERVICES INCORPORATED

                      By: /s/ James Attwood
                          -----------------------------------
                          Name: James Attwood
                          Title:

                      GTE CORPORATION

                      By: /s/ Charles R. Lee
                          -----------------------------------
                          Name: Charles R. Lee
                          Title:

<PAGE>

                                                                       EXHIBIT F

     For purposes of this Exhibit F, the projected and actual financial and
operational results of Cybertel RSA exclude the results of the Excluded
Business.

     "EBITDA Subscriber Amount" shall mean, in the event that there shall exist

          (a) an Excess EBITDA Amount and an Excess Subscriber Equivalent
     Amount, zero;

          (b) a Shortfall EBITDA Amount and a Shortfall Subscriber Equivalent
     Amount,

               (i)  the greater of such shortfall amounts multiplied by 0.75
          plus

               (ii) the lesser of such shortfall amounts multiplied by 0.25; and

          (c) an Excess EBITDA Amount and a Shortfall Subscriber Equivalent
     Amount or an Excess Subscriber Equivalent Amount and a Shortfall EBITDA
     Amount,

               (i)  such shortfall amount multiplied by 0.75 minus

               (ii) such excess amount; provided, that, in no event shall the
          product derived in subparagraph (c)(i) above, be reduced by more than
          the product of such shortfall amount multiplied by 0.1875.

                                       F-1
<PAGE>

                   (Excess and Shortfall Amount Definitions)

     "Excess EBITDA Amount" shall mean the product of (i) the EBITDA Surplus
Amount, if any, multiplied by (ii) 7.188, multiplied by (iii) a fraction the
numerator of which is (x) 12 and the denominator of which is (y) the number of
months in the Operational Adjustment Period (such fraction, the "Closing Period
Fraction"), multiplied by (iv) 0.877.

     "Shortfall EBITDA Amount" shall mean the product of (i) the EBITDA Deficit
Amount, if any, multiplied by (ii) 7.188, multiplied by (iii) the Closing Period
Fraction, multiplied by (iv) 0.877.

     "Excess Subscriber Equivalent Amount" shall mean the product of (i) the
Subscriber Equivalent Surplus Amount, if any, multiplied by (ii) $37.66,
multiplied by (iii) 12, multiplied by (iv) 0.3872, multiplied by (v) 11.406,
multiplied by (vi) 0.877.

     "Shortfall Subscriber Equivalent Amount" shall mean the product of (i) the
Subscriber Equivalent Deficit Amount, if any, multiplied by (ii) $37.66,
multiplied by (iii) 12, multiplied by (iv) 0.3872, multiplied by (v) 11.406,
multiplied by (vi) 0.877.

                                       F-2
<PAGE>

                   (Surplus and Deficit Amount Definitions)

     "EBITDA Surplus Amount" shall mean the excess, if any, of (x) the Actual
Pre-Marketing EBITDA Amount over (y) the Projected Pre-Marketing EBITDA Amount.

     "EBITDA Deficit Amount" shall mean the excess, if any, of (x) the product
of (i) 0.95 multiplied by (ii) the Projected Pre-Marketing EBITDA Amount over
(y) the Actual Pre-Marketing EBITDA Amount.

     "Subscriber Equivalent Surplus Amount" shall mean in the event that there
shall exist:

          (a) a Non Pre-Paid Subscriber Surplus Amount and a Pre-Paid Subscriber
     Equivalent Surplus Amount, the sum of such amounts;

          (b) a Non Pre-Paid Subscriber Deficit Amount and a Pre-Paid Subscriber
     Equivalent Deficit Amount, zero;

          (c) a Non Pre-Paid Subscriber Surplus Amount and a Pre-Paid Subscriber
     Equivalent Deficit Amount or a Non Pre-Paid Subscriber Deficit Amount and a
     Pre-Paid Subscriber Equivalent Surplus Amount, the excess, if any, of such
     surplus amount over such deficit amount.

     "Subscriber Equivalent Deficit Amount" shall mean in the event that there
shall exist:

          (a) a Non Pre-Paid Subscriber Deficit Amount and a Pre-Paid Subscriber
     Equivalent Deficit Amount, the sum of such amounts;

          (b) a Non Pre-Paid Subscriber Surplus Amount and a Pre-Paid Subscriber
     Equivalent Surplus Amount, zero; or

          (c) a Non Pre-Paid Subscriber Deficit Amount and Pre-Paid Subscriber
     Equivalent Surplus Amount or a Non Pre-Paid Subscriber Surplus Amount and a
     Pre-Paid Subscriber Equivalent Deficit Amount, the excess, if any, of such
     deficit amount over such surplus amount.

                                      F-3
<PAGE>

     "Pre-Paid Subscriber Equivalent Surplus Amount" shall mean the excess, if
any, of (x) the Actual Pre-Paid Subscriber Equivalent Net Adds over (y) the
Projected Pre-Paid Subscriber Equivalent Net Adds.

     "Pre-Paid Subscriber Equivalent Deficit Amount" shall mean the excess, if
any, of (x) the product of (i) 0.95 multiplied by (ii) the Projected Pre-Paid
Subscriber Equivalent Net Adds over (y) the Actual Pre-Paid Subscriber
Equivalent Net Adds.

     "Non Pre-Paid Subscriber Surplus Amount" shall mean the excess, if any, of
(x) the Actual Non Pre-Paid Subscriber Net Adds over (y) the Projected Non Pre-
Paid Subscriber Net Adds.

     "Non Pre-Paid Subscriber Deficit Amount" shall mean the excess, if any, of
(x) the product of (i) 0.95 multiplied by (ii) the Projected Non Pre-Paid
Subscriber Net Adds over (y) the Actual Non Pre-Paid Subscriber Net Adds.

                                       F-4
<PAGE>

                      (Projected and Actual Definitions)

     "Projected Pre-Marketing EBITDA Amount" shall mean the projected aggregate
Pre-Marketing EBITDA of Cybertel Cellular and Cybertel RSA set forth on Annex I
to this Exhibit F for the months in the Operational Adjustment Period.

     "Actual Pre-Marketing EBITDA Amount" shall mean the actual aggregate Pre-
Marketing EBITDA of Cybertel Cellular and Cybertel RSA for the Operational
Adjustment Period, calculated on a basis consistent with the calculation of the
Projected Pre-Marketing EBITDA Amount.

     "Projected Pre-Paid Subscriber Equivalent Net Adds" shall mean the
projected aggregate Pre-Paid Subscriber Equivalent Net Adds set forth on Annex
II to this Exhibit F for the months in the Operational Adjustment Period.

     "Actual Pre-Paid Subscriber Equivalent Net Adds" shall mean the actual
aggregate Pre-Paid Subscriber Equivalent Net Adds for the Operational Adjustment
Period, calculated on a basis consistent with the calculation of the Projected
Pre-Paid Subscriber Equivalent Net Adds; provided, that, in no event shall such
sum be greater than 150% of the Projected Pre-Paid Subscriber Equivalent Net
Adds.

     "Projected Non Pre-Paid Subscriber Net Adds" shall mean the projected
aggregate Non Pre-Paid Subscriber Net Adds set forth on Annex III to this
Exhibit F for the months in the Operational Adjustment Period.

     "Actual Non Pre-Paid Subscriber Net Adds" shall mean the actual aggregate
Non Pre-Paid Subscriber Net Adds for the Operational Adjustment Period,
calculated on a basis consistent with the calculation of the Projected Non Pre-
Paid Subscriber Net Adds.

                                       F-5
<PAGE>

                          (Miscellaneous Definitions)

     "Pre-Marketing EBITDA" shall mean Operating Income plus Depreciation and
Amortization expenses plus Sales and Marketing expenses, excluding the effect of
any and all non-recurring items (including, without limitation, any expenses,
directly or indirectly incurred in connection with the acquisition of the
Companies by Buyer pursuant to the Agreement) and calculated in accordance with
the accounting policies and procedures used in the preparation of the applicable
budgets for Cybertel Cellular and Cybertel RSA and their respective Subsidiaries
on a consolidated basis for the twelve-month periods ending December 31, 1999
and December 31, 2000.

     "Pre-Paid Subscriber Equivalent Net Adds" shall mean the product of (a) 0.5
multiplied by (b)(i) the aggregate number of gross additions of Pre-Paid
Subscribers minus (ii) the aggregate number of gross terminations of Pre-Paid
Subscribers of Cybertel Cellular and Cybertel RSA (such number of gross
terminations, for purposes of this calculation, excluding the termination of
5,319 prepaid accounts as described in Section 6.23 (Prepaid Accounts) of the
Agreement).

     "Non Pre-Paid Subscriber Net Adds" shall mean (a) the aggregate number of
gross additions of Non Pre-Paid Subscribers minus (b) the aggregate number of
gross terminations of Non Pre-Paid Subscribers (such number of gross
terminations, for purposes of this calculation, excluding the termination of any
Employee Customers as described in Section 6.20(a) (Employee Customers) of the
Agreement).

     "Pre-Paid Subscribers" shall mean customers of Cybertel Cellular and
Cybertel RSA who pay for cellular services in advance and who do not receive a
monthly bill for such services.

     "Non Pre-Paid Subscribers" shall mean all customers of Cybertel Cellular
and Cybertel RSA other than Pre-Paid Subscribers.

                                      F-6
<PAGE>

     "Operational Adjustment Period" shall mean the period commencing March 1,
1999 through the end of the month preceding the month in which the Closing
occurs.

                                      F-7<PAGE>

                                                                   EXHIBIT 10.29

                                                                  Execution Copy
================================================================================

                           STOCK PURCHASE AGREEMENT

                                     among

                    AMERITECH MOBILE COMMUNICATIONS, INC.,

                      GTE CONSUMER SERVICES INCORPORATED

                                      and

                                GTE CORPORATION

                           Dated as of April 2, 1999

================================================================================
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
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                                   ARTICLE I

Section 1.1    Specific Definitions........................................    2
Section 1.2    Other Terms.................................................   16
Section 1.3    Other Definitional Provisions...............................   16

                                  ARTICLE II

                          Purchase and Sale of Shares

Section 2.1    Purchase and Sale of Shares.................................   17
Section 2.2    Adjustment of the Base Purchase Price.......................   17
Section 2.3    Estimated Purchase Price....................................   17
Section 2.4    Closing; Delivery and Payment...............................   18
Section 2.5    Post-Closing Adjustment.....................................   18

                                  ARTICLE III

                   Representations and Warranties of Seller

Section 3.1    Organization and Authority of Seller........................   21
Section 3.2    Organization and Qualification of the Companies.............   22
Section 3.3    Capitalization of the Companies.............................   22
Section 3.4    Subsidiaries of the Companies; Minority Interests...........   23
Section 3.5    Financial Statements........................................   25
Section 3.6    Absence of Certain Changes or Events........................   27
Section 3.7    Communications Licenses.....................................   27
Section 3.8    Litigation..................................................   27
Section 3.9    Compliance with Law and Licenses............................   28
Section 3.10   Contracts...................................................   28
Section 3.11   Consents and Approvals......................................   31
Section 3.12   Tax Matters.................................................   31
Section 3.13   Labor Matters...............................................   32
Section 3.14   Employee Benefits...........................................   32
</TABLE>

                                      -i-
<PAGE>

<TABLE>
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Section 3.15   Environmental Matters.......................................   34
Section 3.16   Property and Leases.........................................   35
Section 3.17   Accounts Receivables; Debt..................................   35
Section 3.18   Affiliate Transactions......................................   35
Section 3.19   Year 2000 Compliance........................................   36
Section 3.20   Ability to Conduct Business.................................   36
Section 3.21   Brokers and Finders.........................................   37
Section 3.22   No Other Representations or Warranties......................   37

                                   ARTICLE IV

                     Representations and Warranties of Buyer

Section 4.1    Organization and Authority of Buyer and Buyer Parent........   37
Section 4.2    Consents and Approvals......................................   38
Section 4.3    Brokers and Finders.........................................   39
Section 4.4    Financial Capability........................................   39
Section 4.5    Securities Act..............................................   39
Section 4.6    Litigation..................................................   39
Section 4.7    Investigation by Buyer......................................   40
Section 4.8    Governmental Consents.......................................   40
Section 4.9    No Other Representations or Warranties......................   40

                                    ARTICLE V

                                   Tax Matters

Section 5.1    Liability for Taxes and Related Matters.....................   40
Section 5.2    Transfer Taxes..............................................   45
Section 5.3    Information to be Provided by Buyer.........................   45
Section 5.4    Assistance and Cooperation..................................   46
Section 5.5    Miscellaneous...............................................   46
Section 5.6    Section 338(h)(10); Alternative Transaction Structure.......   47
Section 5.7    Survival of Obligations.....................................   48
</TABLE>

                                     -ii-
<PAGE>

<TABLE>
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                                   ARTICLE VI

                              Certain Covenants and
                         Agreements of Seller and Buyer

Section 6.1    Access and Information......................................   48
Section 6.2    Conduct of Business.........................................   51
Section 6.3    Registrations, Filings and Consents.........................   54
Section 6.4    Employee Benefit Plans......................................   57
Section 6.5    Retention of Books and Records..............................   61
Section 6.6    Consent Decree..............................................   62
Section 6.7    Company Assets..............................................   62
Section 6.8    Intellectual Property.......................................   62
Section 6.9    Resignations................................................   63
Section 6.10   Partnership Agreements......................................   63
Section 6.11   Litigation..................................................   63
Section 6.12   Certain Transactions........................................   64
Section 6.13   Employees...................................................   64
Section 6.14   Contracts...................................................   67
Section 6.15   Transition Services.........................................   69
Section 6.16   Roaming Agreement...........................................   69
Section 6.17   Non-Solicitation............................................   69
Section 6.18   Intercompany Obligations....................................   71
Section 6.19   Customer Communications and Billing.........................   71
Section 6.20   Alternative Transaction Structure...........................   72
Section 6.21   Employee Customers..........................................   73
Section 6.22   Year 2000 Testing...........................................   73
Section 6.23   Transition Committees.......................................   73
Section 6.24   Prepaid Accounts............................................   74
Section 6.25   Transition Services Revisions...............................   74
Section 6.26   Restriction on Use..........................................   74
Section 6.27   License.....................................................   75
Section 6.28   License for Certain Proprietary Software....................   76
Section 6.29   Expenditures................................................   77
Section 6.30   Further Assurances..........................................   77

                                   ARTICLE VII

                              Conditions to Closing

Section 7.1    Conditions to Each Party's Obligation to Effect
                 the Transaction...........................................   77
Section 7.2    Conditions to Obligations of Buyer..........................   78
</TABLE>

                                      -iii-
<PAGE>

<TABLE>
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Section 7.3    Conditions to Obligations of Seller.........................   79

                                  ARTICLE VIII

                                   Termination

Section 8.1    Termination.................................................   80
Section 8.2    Effect of Termination.......................................   82

                                   ARTICLE IX

                          Survival And Indemnification

Section 9.1    Survival of Representations, Warranties,
                 Covenants and Agreements..................................   82
Section 9.2    Indemnification by Buyer....................................   83
Section 9.3    Indemnification by Seller...................................   84
Section 9.4    Indemnification as Sole Remedy..............................   85
Section 9.5    Method of Asserting Claims, Etc.............................   86
Section 9.6    Calculation of Losses.......................................   89
Section 9.7    Assignment of Claims........................................   89
Section 9.8    Overlapping Provisions......................................   90

                                    ARTICLE X

                                  Miscellaneous

Section 10.1   Amendment and Waiver........................................   90
Section 10.2   Expenses....................................................   90
Section 10.3   Public Disclosure...........................................   91
Section 10.4   Assignment..................................................   91
Section 10.5   Entire Agreement............................................   91
Section 10.6   Fulfillment of Obligations..................................   92
Section 10.7   Parties in Interest; No Third Party Beneficiaries...........   92
Section 10.8   Guarantee...................................................   92
Section 10.9   Counterparts................................................   92
Section 10.10  Section Headings............................................   92
Section 10.11  Notices.....................................................   92
</TABLE>

                                      -iv-
<PAGE>

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Section 10.12  Governing Law; Submission to
                 Jurisdiction; Selection of Forum..........................   94
Section 10.13  Waiver of Jury Trial........................................   95
Section 10.14  Severability................................................   95
</TABLE>

                           SELLER DISCLOSURE SCHEDULES

Schedule 1.1      Accounting Principles
Schedule 2.2      Purchase Price Adjustment
Schedule 3.2      Organization and Qualification of the Companies
Schedule 3.3(a)   Capitalization of the Companies
Schedule 3.3(b)   Capitalization of the Companies
Schedule 3.4(a)   Subsidiaries of Chicago Cellular
Schedule 3.4(b)   Subsidiaries of Central Illinois Cellular
Schedule 3.4(c)   Other Equity Interests
Schedule 3.5(a)   Chicago Cellular Financial Statements
Schedule 3.5(b)   Central Illinois Cellular Financial Statements
Schedule 3.5(c)   Chicago SMSA Limited Partnership, Illinois
                  SMSA Limited Partnership and Illinois RSA
                  6 & 7 Limited Partnership Financial Statements
Schedule 3.5(e)   Metrocom Liabilities and Obligations
Schedule 3.5(f)   Pro Forma Balance Sheets of the Companies and their
                    Subsidiaries
Schedule 3.5(g)   Capital Expenditure Budgets
Schedule 3.6      Absence of Certain Changes or Events
Schedule 3.7      Communications Licenses
Schedule 3.8      Litigation
Schedule 3.10(a)  Contracts
Schedule 3.10(b)  Availability of Contracts
Schedule 3.10(c)  Conflicts
Schedule 3.10(d)  Seller and Affiliates Contracts
Schedule 3.11     Seller Consents and Approvals
Schedule 3.12     Tax Matters
Schedule 3.14(a)  Benefit Plans
Schedule 3.14(d)  Retiree Health and Life Benefits
Schedule 3.14(e)  Severance
Schedule 3.15     Environmental Matters
Schedule 3.16(a)  Owned and Leased Real Property
Schedule 3.18     Affiliate Transactions
Schedule 3.20     Services and Assets
Schedule 3.21     Brokers and Finders
Schedule 6.2      Conduct of Business
Schedule 6.7      Asset Transfers

                                       -v-
<PAGE>

Schedule 6.8      Certain Marks
Schedule 6.13     Employees
Schedule 6.14     Certain Contracts
Schedule 6.17     National/Large Accounts
Schedule 6.20(a)  Alternative Transaction
Schedule 6.20(b)  Step Up Tax Loss
Schedule 6.28     Proprietary Software
Schedule 9.3      Certain Litigation

                           BUYER DISCLOSURE SCHEDULES

Schedule 4.2      Buyer Consents and Approvals

                                    EXHIBITS

Exhibit A         Form of Transition Services Agreement
Exhibit B         Form of Roaming Agreement
Exhibit C         Form of Trademark License Agreement
Exhibit D-1       Form of Opinion from Seller's inside Counsel
Exhibit D-2       Form of Opinion from Skadden, Arps, Slate,
                  Meagher & Flom LLP
Exhibit E         Form of Opinion from Buyer's Counsel
Exhibit F         EBITDA Subscriber Amount

                                      -vi-
<PAGE>

     STOCK PURCHASE AGREEMENT (the "Agreement"), dated as of April 2, 1999,
among Ameritech Mobile Communications, Inc., a Delaware corporation ("Seller"),
GTE Consumer Services Incorporated, a Delaware corporation ("Buyer") and solely
for purposes of Section 10.8 GTE Corporation, a New York corporation ("Buyer
Parent").

                             W I T N E S S E T H:

     WHEREAS, Ameritech Corporation, a Delaware corporation ("Parent"), SBC
Communications Inc., a Delaware corporation ("SBC"), and SBC Delaware, Inc., a
Delaware corporation ("SBC Sub") have entered into an Agreement and Plan of
Merger, dated as of May 10, 1998 (as such agreement may be amended from time to
time, the "Merger Agreement"), contemplating the merger (the "Merger") of SBC
Sub with and into Parent;

     WHEREAS, Seller is a wholly owned Subsidiary of Parent;

     WHEREAS, Seller owns (i) all of the issued and outstanding shares of common
stock, no par value (the "Chicago Shares"), of Ameritech Mobile Phone Service of
Chicago, Inc., an Illinois corporation ("Chicago Cellular") and (ii) all of the
issued and outstanding shares of common stock, no par value (the "Central
Illinois Shares"), of Ameritech Mobile Phone Service of Illinois, Inc., an
Illinois corporation ("Central Illinois Cellular" and, together with Chicago
Cellular, the "Companies");

     WHEREAS, the transactions contemplated by this agreement are necessary for
SBC, following the consummation of the Merger, to be in compliance with the
Commercial Mobile Radio Service spectrum aggregation limit restrictions
contained in 47 C.F.R. Section 20.6 and the Cellular Cross Ownership limitations
contained in 47 C.F.R. Section 22.942;

     WHEREAS, in the absence of compliance with such federal regulations, the
Merger could not be consummated; and

     WHEREAS, subject to the closing of the Merger, Seller desires to sell and
transfer to Buyer, and Buyer desires to purchase from Seller, all of the issued
and outstanding shares of capital stock of Chicago Cellular and
<PAGE>

Central Illinois Cellular, as more specifically provided herein;

     NOW, THEREFORE, in consideration of the mutual covenants and undertakings
contained herein, and subject to and on the terms and conditions herein set
forth, the par ties hereto agree as follows:

                                   ARTICLE I

     Section 1.1 Specific Definitions. As used in this Agreement, the following
terms shall have the meanings set forth or referenced below:

     "Additional Employees" shall have the meaning set forth in Section 6.13(b).

     "Affiliate", as applied to any Person, means any other Person directly or
indirectly Controlling, Controlled by or under common Control with such Person.

     "Agreement" shall mean, as the context requires, this Agreement and all
Schedules and Exhibits hereto, as amended, supplemented or otherwise modified
from time to time in accordance with the terms hereof.

     "Alternative Transaction" shall have the meaning set forth in Section 6.20.

     "Ancillary Agreements" shall mean the Transition Services Agreement and the
Roaming Agreement.

     "Applicable Rate" shall mean the one-month LIBOR rate as published in the
Wall Street Journal on the Closing Date.

     "Base Purchase Price" shall have the meaning set forth in Section 2.1.

     "Benefit Plans" shall have the meaning set forth in Section 3.14(a).

     "Business" shall mean the business of (a) operating Commercial Mobile Radio
Service, including, without limitation, the business of operating and
maintaining equipment necessary to operate the systems

                                      -2-

<PAGE>

providing such service, and (b) marketing, selling and providing
Telecommunications Service and Information Service via such systems as well as
products (including Customer Premises Equipment) and services that are ancillary
to marketing, selling and providing such Telecommunications Service and
Information Service via such systems, as conducted on the date hereof by the
Companies and their Subsidiaries in the Chicago Market and the Central Illinois
Market, but shall exclude the businesses of providing, reselling, operating or
managing paging services, wireline telephony or transport services, including
wireline long-distance services and any fixed wireless services.

     "Business Customers" shall mean those customers of the Business who acquire
services pursuant to business volume price plans.

     "Business Day" shall mean any day other than a Saturday, a Sunday or a day
on which banks in the City of New York are authorized or obligated by law or
executive order to close.

     "Buyer" shall have the meaning set forth in the Preamble.

     "Buyer Disclosure Schedule" shall have the meaning set forth in the
Preamble of Article IV.

     "Buyer Indemnified Parties" shall have the meaning set forth in Section
9.3(a).

     "Buyer Parent" shall have the meaning set forth in the Preamble.

     "Buyer Savings Plan" shall have the meaning set forth in Section 6.4(d).

     "Calculation" shall have the meaning set forth in Section 2.5(a).

     "Cellular Authorizations" shall have the meaning set forth in Section 3.11.

     "Central Illinois Cellular" shall have the meaning set forth in the
Recitals.

                                      -3-

<PAGE>

     "Central Illinois Cellular Working Capital" shall mean (A)(i) the
consolidated current assets (including cash and cash equivalents) of Central
Illinois Cellular and its Subsidiaries, minus (ii) the consolidated current
liabilities of Central Illinois Cellular and its Subsidiaries, clauses (i) and
(ii) being calculated from time to time in a manner consistent with the
accounting policies, methods, principles and practices specified on Schedule
1.1 and, if not specified thereon, used in the preparation of the Central
Illinois Financial Statements, plus (iii) the Excess Central Illinois Cellular
Investment Amount, if any, minus (iv) the Shortfall Central Illinois Cellular
Investment Amount, if any, multiplied by (B) the Central Illinois Ownership
Percentage.

     "Central Illinois Expenditure Budgets" shall have the meaning set forth in
Section 3.5(g).

     "Central Illinois Financial Statements" shall have the meaning set forth
in Section 3.5(b).

     "Central Illinois Market" shall mean the Metropolitan Statistical Areas of
Springfield, Illinois; Champaign-Urbana/Rantoul, Illinois; Bloomington-Normal,
Illinois; and Decatur, Illinois; and the Rural Service Areas of Mason, Illinois
(Illinois RSA #5-B2); Montgomery, Illinois (Illinois RSA #6); Danville,
Illinois (Illinois RSA #7) and Adams, Illinois (Illinois RSA #4-B1), taken
together.

     "Central Illinois Ownership Percentage" shall mean the aggregate
proportionate ownership interest as of the Closing Date of Seller in the
working capital of Central Illinois Cellular and its Subsidiaries.

     "Central Illinois Purchase Price" shall have the meaning set forth in
Section 2.1.

     "Central Illinois Required Expenditure Amount" shall mean the sum of the
amounts of capital expenditure set forth in the Central Illinois Expenditure
Budgets for the months in the period from the date hereof through the Closing
Date with the amount included in such sum for any partial months in such period
pro rated based on the number of days elapsed in such period during such month
and the total number of days in such month.

                                      -4-
<PAGE>

     "Central Illinois Shares" shall have the meaning set forth in the
Recitals.

     "Certificate of Authority" shall mean a Certificate of Authority issued by
the IURC pursuant to the Indiana Code.

     "Certificate of Convenience and Necessity" shall mean a certificate of
convenience and public necessity issued by the ICC pursuant to Chapter 220 of
the Illinois Compiled Statutes, or the applicable predecessor statute.

     "Chicago Cellular" shall have the meaning set forth in the Recitals.

     "Chicago Cellular Expenditure Budgets" shall have the meaning set forth in
Section 3.5(g).

     "Chicago Cellular Financial Statements" shall have the meaning set forth
in Section 3.5(a).

     "Chicago Cellular Ownership Percentage" shall mean the aggregate
proportionate ownership interest of Seller as of the Closing Date in the
working capital of Chicago Cellular and its Subsidiaries.

     "Chicago Cellular Purchase Price" shall have the meaning set forth in
Section 2.1.

     "Chicago Cellular Required Expenditure Amount" shall mean the sum of the
amounts of capital expenditure set forth in the Chicago Cellular Expenditure
Budgets for the months in the period from the date hereof through the Closing
Date with the amount included in such sum for any partial months in such period
pro rated based on the number of days elapsed in such period during such month
and the total number of days in such month.

     "Chicago Cellular Working Capital" shall mean (a)(i) the consolidated
current assets (including cash and cash equivalents) of Chicago Cellular and
its Subsidiaries, minus (ii) the consolidated current liabilities of Chicago
Cellular and its Subsidiaries, clauses (i) and (ii) being calculated from time
to time in a manner consistent with the accounting policies, methods,
principles and practices specified on Schedule 1.1 and if not specified thereon
used in the preparation of the Chicago Cellular Financial

                                      -5-
<PAGE>

Statements, plus (iii) the Excess Chicago Cellular Investment Amount, if any,
minus (iv) the Shortfall Chicago Cellular Investment Amount, if any, multiplied
by (b) the Chicago Cellular Ownership Percentage.

     "Chicago Market" shall mean the Metropolitan Statistical Areas of Chicago,
Illinois, Gary-Hammond-East Chicago, Indiana; Kankakee, Illinois; Aurora-Elgin,
Illinois and Joliet, Illinois and the Rural Service Area of Newton, Indiana
(Indiana RSA #1-B2), taken together.

     "Chicago Shares" shall have the meaning set forth in the Recitals.

     "Chosen Courts" shall have the meaning set forth in Section 10.12.

     "Claim Notice" shall have the meaning set forth in Section 9.5.

     "Closing" shall have the meaning set forth in Section 2.4(a).

     "Closing Date" shall have the meaning set forth in Section 2.4(a).

     "Closing Long Term Liabilities" shall mean the long term liabilities of
the Companies and their Subsidiaries on a combined basis as of the Closing
Date calculated in a manner consistent with the accounting policies, methods,
principles, and practices specified on Schedule 1.1 and if not specified
thereon used in the preparation of the Financial Statements.

     "Closing Statement" shall have the meaning specified in Section 2.5(a).

     "Closing Working Capital" shall mean the sum of the Chicago Cellular
Working Capital and the Central Illinois Cellular Working Capital, in each case
as of the Closing Date determined in accordance with the provisions of Section
2.5.

     "Code" shall mean the Internal Revenue Code of 1986, as amended.

                                      -6-
<PAGE>

     "Commercial Mobile Radio Service" shall have the meaning set forth in 47
U.S.C. Section 332(d).

     "Communications Act" shall mean the Communications Act of 1934, as
amended, and the rules and regulations promulgated thereunder.

     "Communications Licenses" shall mean all licenses required to conduct the
Business under applicable requirements of the FCC or state public utilities
commissions, including, without limitation, licenses from the FCC, Certificates
of Convenience and Necessity and Certificates of Authority.

     "Companies" shall have the meaning set forth in the Recitals.

     "Confidentiality Agreement" shall have the meaning set forth in Section
6.1(c).

     "Confidential Information Memoranda" shall mean those Confidential
Information Memoranda dated January 1999 relating to, among other Persons,
Chicago Cellular and its Subsidiaries and Central Illinois Cellular and its
Subsidiaries, each sent to Buyer.

     "Consent Decree" shall mean the consent decree related to the Merger,
between the DOJ, on the one hand, and SBC and Parent, on the other hand, filed
with the United States District Court for the District of Columbia in the case
entitled United States v. SBC and Parent on March 23, 1999.

     "Contracts" shall mean any agreement, lease, contract, note, mortgage,
indenture, arrangement or other obligation.

     "Control" shall mean, and "controlled" and "controlling" shall refer to
the possession, direct or indirect, of the power to direct or cause the
direction of the management and policies of a Person, whether through the
ownership of voting securities, by contract, or otherwise.

     "CPA Firm" shall have the meaning set forth in Section 2.5(c).

                                      -7-
<PAGE>

     "CR Executives" shall have the meaning set forth in Section 6.13(c).

     "CR Plan" shall have the meaning set forth in Section 6.13(c).

     "Customer Premises Equipment" shall have the meaning set forth in 47
U.S.C. ss.3(14).

     "Deductible" shall have the meaning set forth in Section 9.1.

     "Designated Employees" shall have the meaning set forth in Section
6.13(a).

     "DOJ" shall mean the United States Department of Justice.

     "EBITDA Subscriber Amount" shall have the meaning set forth on Exhibit F.

     "Encumbrances" shall mean liens, pledges, security interests or other
encumbrances.

     "Environmental Law" means any law, regulation, code, ordinance,
requirement of common law, license, permit, approval, authorization, notice,
order, judgment, decree or injunction, and any written publicly available
judicial or administrative interpretation thereof, of the United States, any
interstate authority, any State or political subdivision thereof (including any
court thereof and any Governmental Entity) regulating the protection of the
environment (including air, water, soil and natural resources), occupational
safety as it relates to Hazardous Substance exposure, or the use, storage,
handling, release, treatment or disposal of any Hazardous Substance as in
effect on the date hereof.

     "ERISA" shall have the meaning set forth in Section 3.14(b).

     "ERISA Affiliate" shall have the meaning set forth in Section 3.14(c).

     "Estimated Closing Adjustment" shall have the meaning set forth in Section
2.3.

                                      -8-
<PAGE>

     "Estimated Purchase Price" shall mean (i) the Base Purchase Price plus
(ii) the amount(positive or negative)of the Estimated Closing Adjustment.

     "Excess Central Illinois Cellular Investment Amount" shall mean the
excess, if any, of (x) the aggregate of the actual capital expenditures of
Central Illinois Cellular and its Subsidiaries on a consolidated basis from the
date hereof through the Closing Date over (y) 105% of the Central Illinois
Required Expenditure Amount, calculated in accordance with GAAP applied on a
basis consistent with those policies used in the Central Illinois Expenditures
Budget and in accordance with the accounting policies, methods, principles, and
practices used in the preparation of the Central Illinois Expenditure Budgets;
provided, that capital expenditures in excess of 105% of the Central Illinois
Required Expenditure Amount shall be included in this calculation only to the
extent they have been previously approved in writing by Buyer.

     "Excess Chicago Cellular Investment Amount" shall mean the excess, if any,
of (x) the aggregate of the actual capital expenditures of Chicago Cellular and
its Subsidiaries on a consolidated basis from the date hereof through the
Closing Date over (y) 105% of the Chicago Cellular Required Expenditure Amount
calculated in accordance with GAAP applied on a basis consistent with those
policies used in the Chicago Cellular Expenditure Budgets and in accordance
with the accounting policies, methods, principles and practices used in the
preparation of the Chicago Cellular Expenditure Budgets; provided, that capital
expenditures in excess of 105% of the Chicago Required Expenditure Amount shall
be included in this calculation only to the extent they have been previously
approved in writing by Buyer.

     "Extended Termination Date" shall have the meaning set forth in Section
8.1(d).

     "FCC" shall mean the Federal Communications Commission.

     "Financial Statements" shall have the meaning set forth in Section 3.5(b).

     "GAAP" shall mean United States generally accepted accounting principles.

                                      -9-
<PAGE>

     "Governmental Consents" shall have the meaning set forth in Section
7.1(a).

     "Governmental Entity" shall mean any governmental or regulatory authority,
agency, commission, body, court or other governmental entity of the United
States of America or any State or political subdivision thereof.

     "Government Regulatory Entity" shall have the meaning set forth in Section
6.3(d).

     "Hazardous Substance" shall mean any substance listed, defined, designated
or classified as hazardous, toxic or as a pollutant, contaminant, solid waste
or radioactive waste under any applicable Environmental Law, including
petroleum, petroleum products and any derivative or by-products thereof,
polychlorinated biphenyls, asbestos and radioactive materials.

     "HSR Act" shall mean the Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended.

     "ICC" shall mean the Illinois Commerce Commission.

     "Indemnified Party" shall have the meaning set forth in Section 9.3(a).

     "Indemnifying Party" shall have the meaning set forth in Section 9.5.

     "Information Service" shall have the meaning set forth in 47
U.S.C. ss.3(20).

     "Initial Period" shall have the meaning set forth in Section 6.26(b).

     "IRS" shall mean the Internal Revenue Service.

     "IURC" shall mean the Indiana Utility Regulatory Commission.

     "Knowledge", with respect to Seller, shall mean the actual knowledge of
any of the following employees of Seller: Walter S. Catlow, Don P. Crockford,
Jay Ellison, Bennett P. Gamel, Barbara Goworowski, Nancy G. Howe, Geoffrey M.
Knoezer, Anthony R. Muscato, Dennis L. Myers, Paul G. Osland, Raymond H. Panza,
Pamela L. Rashid, and

                                      -10-
<PAGE>

Linda Wokoun, and, with respect to Buyer, shall mean the actual knowledge of all
directors and executive officers of Buyer, in each case, arising without the
conduct by any such Person of any independent investigation with respect to the
facts or matters specified.

     "Law" shall have the meaning set forth in Section 3.1.

     "Licenses" shall mean all permits, licenses, waivers, and authorizations
other than Communications Licenses from any Governmental Entity.

     "Limit" shall have the meaning set forth in Section 9.1.

     "Losses" shall have the meaning set forth in Section 9.2(a).

     "Management Severance Plan" shall have the meaning set forth in Section
6.4(b).

     "Markets" shall have the meaning set forth in Section 6.26(a).

     "Material Adverse Effect" shall mean an effect that is materially adverse
to the business, operations, assets, liabilities or financial condition of the
Companies and their respective Subsidiaries, taken as a whole, and for these
purposes, shall include aspects of the Business to be transferred to or assumed
by Buyer, the Companies or their Subsidiaries on or before the Closing Date, but
shall exclude any change or development after the date of this Agreement
resulting from (i) any change in Law or interpretations thereof, (ii) changes in
interest rates, general economic conditions or changes in the general economic
condition of the Chicago Market or the Central Illinois Market, (iii) changes
affecting the Commercial Mobile Radio Service industry generally or (iv) the
entry into this Agreement or the performance of a party's obligations hereunder
(other than changes relating to or resulting from provisions in Contracts
breached by, requiring consents in connection with or the contractual rights
under which are otherwise adversely impacted by, this Agreement or the
consummation of the transactions contemplated hereby, or effects relating to, or
resulting from, provisions in any License or Communications License or

                                     -11-
<PAGE>

any Law governing such License or Communications License breached by, requiring
consents in connection with or otherwise adversely impacted by this Agreement
or the consummation of the transactions contemplated hereby).

     "Metrocom" shall mean Metrocom Communications, Inc.

     "Merger" shall have the meaning set forth in the Recitals.

     "Merger Agreement" shall have the meaning set forth in the Recitals.

     "Mirror Severance Plan" shall have the meaning set forth in Section 6.4(b).

     "National/Large Accounts" shall mean those customers of the Business set
forth on Schedule 6.17, with those customers noted with an asterisk on such
schedule being "In Market National/Large Accounts."

     "New Marks" shall have the meaning specified in Section 6.27.

     "Notice Period" shall have the meaning set forth in Section 9.5.

     "Order" shall have the meaning set forth in Section 7.1(b).

     "Parent" shall have the meaning set forth in the Recitals.

     "Pension Plan" shall have the meaning set forth in Section 3.14(b).

     "Permitted Shares Transferee" shall have the meaning set forth in Section
6.6.

     "Person" shall mean any individual, corporation, partnership, limited
liability company, firm, joint venture, association, joint-stock company, trust,
unincorporated organization, governmental or regulatory body or other entity.

                                     -12-
<PAGE>

     "Post-Closing Adjustment" shall have the meaning set forth in Section
2.5(d).

     "Potential Contributor" shall have the meaning set forth on Section 9.7.

     "Promotional Items" shall have the meaning set forth in Section 9.5(c).

     "Purchase Price" shall have the meaning set forth in Section 2.1.

     "Qualifying Customer Litigation" shall have the meaning set forth in
Section 9.3(b).

     "Resolution Period" shall have the meaning set forth in Section 2.5(b).

     "Resolved Items" shall have the meaning set forth in Section 2.5(b).

     "Roaming Agreement" shall mean the Roaming Agreement between Seller and
Buyer in the form of Exhibit B to be entered into on the Closing Date.

     "St. Louis Market" shall mean the Metropolitan Statistical Area of St.
Louis, Missouri, and the Rural Service Areas of Callaway, Missouri (Missouri RSA
#8), Maries, Missouri (Missouri RSA #12), Perry, Missouri (Missouri RSA #18) and
Stoddard, Missouri (Missouri RSA #19), taken together.

     "St. Louis Transaction" shall mean the purchase and sale to be effected
pursuant to the Stock Purchase Agreement, dated the date hereof, by and among
the parties hereto and CyberTel Financial Corporation, a Delaware corporation.

     "SBC" shall have the meaning set forth in the Recitals.

     "SBC Sub" shall have the meaning set forth in the Recitals.

     "Schedule 2.2 Adjustment" shall have the meaning set forth in Section 2.2.

                                     -13-
<PAGE>

     "Section 338(h)(10) Election" shall have the meaning set forth in Section
5.6(a).

     "Securities Act" shall mean the Securities Act of 1933, as amended.

     "Seller" shall have the meaning set forth in the Preamble.

     "Seller Disclosure Schedule" shall have the meaning set forth in the
preamble to Article III.

     "Seller Indemnified Parties" shall have the meaning set forth in Section
9.2(a).

     "Seller's Accrual" shall have the meaning set forth in Section 6.4(e).

     "Seller Savings Plan" shall have the meaning set forth in Section 6.4(d).

     "Shared Service Employees" shall have the meaning set forth in Section
6.13(b).

     "Shares" shall mean the Chicago Shares and the Central Illinois Shares
taken together.

     "Shortfall Central Illinois Cellular Investment Amount" shall mean the
excess, if any, of (x) 95% of the Central Illinois Required Expenditure Amount
over (y) the aggregate of the actual capital expenditures made by Central
Illinois Cellular and its Subsidiaries on a consolidated basis from the date
hereof through the Closing Date, calculated in accordance with the accounting
policies, methods, principles and practices used in the preparation of the
Central Illinois Expenditure Budgets.

     "Shortfall Chicago Cellular Investment Amount" shall mean the excess, if
any, of (x) 95% of the Chicago Required Expenditure Amount over (y) the
aggregate of the actual capital expenditures made by Chicago Cellular and its
Subsidiaries on a consolidated basis from the date hereof through the Closing
Date, calculated in accordance with the accounting policies, methods, principles
and practices used in the preparation of the Chicago Cellular Expenditure
Budgets.

                                     -14-
<PAGE>

     "Step Up" shall have the meaning set forth in Section 6.20.

     "Step-up Tax Loss" shall have the meaning set forth in Section 6.20.

     "Subsequent Period" shall have the meaning set forth in Section 6.26(c).

     "Subsidiary" shall mean, as to any Person, any Person (i) of which such
Person directly or indirectly owns, securities or other equity interests
representing fifty percent (50%) or more of the aggregate voting power, (ii) of
which a Person possesses fifty percent (50%) or more of the right to elect
directors or Persons holding similar positions or (iii) which such Person
Controls directly or indirectly through one or more intermediaries, it being
understood that, with respect to the Companies, the term Subsidiary shall be
deemed to include Metrocom.

     "Systems" shall have the meaning set forth in Section 3.19.

     "Tax Package" shall have the meaning set forth in Section 5.3.

     "Tax Returns" shall mean any and all federal, state, local or foreign
returns, reports, claims for refund, information returns, statements or
declarations relating to Taxes.

     "Taxes" shall mean any and all taxes, fees, levies, duties, tariffs,
imports and other charges of any kind imposed by any taxing authority, including
but not limited to any and all federal, state, local or foreign income, gross
receipts, windfall or excess profits, severance, property, production, sales,
use, value added, license, stamp, excise, franchise, employment, withholding or
similar taxes, together with any interest, additions or penalties with respect
thereto and any interest in respect of such additions or penalties.

     "Telecommunications Service" shall have the meaning set forth in 47
U.S.C. ss.3(46).

     "Termination Date" shall have the meaning set forth in Section 8.1(d).

                                     -15-
<PAGE>

     "Trademark License Agreement" shall have the meaning set forth in Section
7.2(e).

     "Trademarks" shall have the meaning set forth in Section 6.26(a).

     "Transfer Taxes" shall have the meaning set forth in Section 5.2.

     "Transferred Employees" shall have the meaning set forth in Section
6.13(b).

     "Transition Services Agreement" shall mean the Transition Services
Agreement between Seller and Buyer in the form of Exhibit A to be entered into
on the Closing Date.

     "Unresolved Items" shall have the meaning set forth in Section 2.5(c).

     "Year 2000 Compliant" shall have the meaning set forth in Section 3.19.

     "Y2K Plan" shall have the meaning set forth in Section 3.19.

     Section 1.2 Other Terms. Other terms may be defined elsewhere in the text
of this Agreement and, unless otherwise indicated, shall have such meaning
indicated throughout this Agreement.

     Section 1.3 Other Definitional Provisions. (a) The words "hereof",
"herein", and "hereunder" and words of similar import, when used in this
Agreement, shall refer to this Agreement as a whole and not to any particular
provision of this Agreement.

     (b) The terms defined in the singular shall have comparable meaning when
used in the plural, and vice versa.

     (c) The terms "dollars" and "$" shall mean United States Dollars.

                                     -16-
<PAGE>

                                  ARTICLE II

                          Purchase and Sale of Shares

     Section 2.1 Purchase and Sale of Shares. Buyer agrees to purchase from
Seller, and Seller agrees to sell to Buyer, in each case subject to the terms
and conditions of this Agreement, (i) all of the issued and outstanding Chicago
Shares for a purchase price equal to $2,330,000,000 (two billion three hundred
thirty million dollars) (the "Chicago Cellular Purchase Price") and (ii) all of
the issued and outstanding Central Illinois Shares for a purchase price equal to
$220,000,000 (two hundred twenty million dollars) (the "Central Illinois
Purchase Price", and together with the Chicago Cellular Purchase Price, the
"Base Purchase Price"), as adjusted pursuant to Section 2.2 (as so adjusted, the
"Purchase Price").

     Section 2.2 Adjustment of the Base Purchase Price. The Base Purchase Price
shall be adjusted as follows: The Purchase Price shall be an amount equal to
(a) the Base Purchase Price plus (b) the amount (positive or negative) of (i)
the Closing Working Capital minus (ii) $6,500,000 (six million five hundred
thousand dollars) minus (c) the amount of the Closing Long Term Liabilities
minus (d) the EBITDA Subscriber Amount, if any, minus (e) the adjustment set
forth on Schedule 2.2, if any (the "Schedule 2.2 Adjustment").

     Section 2.3 Estimated Purchase Price. For the purpose of determining the
amount of cash to be paid by Buyer to Seller on the Closing Date, Seller shall
prepare a calculation of the estimate of the adjustment of the Purchase Price to
be made pursuant to Section 2.2 (the "Estimated Closing Adjustment") as of the
Closing Date based on a good faith estimate by Seller of the amounts included in
such adjustment. Seller shall deliver the calculation of the Estimated Closing
Adjustment to Buyer not less than three Business Days prior to the Closing Date
or, if not practicable, as soon as practicable prior to the Closing, provided
that Seller shall provide such calculation at least three Business Days prior to
the time the Closing is likely to occur. If Buyer objects to the calculation of
the Estimated Closing Adjustment prior to the Closing, Seller agrees to discuss
with Buyer in good faith such objections and to seek to resolve Buyer's
objections and if revised in response to Buyer objections, the revised amount
shall be

                                     -17-
<PAGE>

the Estimated Closing Adjustment; provided, that if Buyer and Seller are unable
to resolve Buyer's objections prior to the Closing, Seller's calculation of the
Estimated Closing Adjustment shall be utilized for purposes of calculating the
Estimated Purchase Price.

     Section 2.4 Closing; Delivery and Payment.

     (a) The delivery of the Shares and payment therefor (the "Closing") shall
take place at the offices of Sullivan & Cromwell, 125 Broad Street, New York,
New York as promptly as is practicable on the Business Day on which the
conditions set forth in Article VII hereof have been satisfied or waived (other
than those conditions that by their nature are to be satisfied at the Closing,
but subject to the satisfaction or waiver of those conditions), or at such other
time and place as the parties hereto may mutually agree. The date on which the
Closing occurs is called the "Closing Date". It is understood and agreed that
Seller will notify Buyer at least three Business Days prior to the Closing that
the Closing is likely to occur, specifying the proposed Closing Date and Seller
agrees that it will reimburse Buyer for any interest expense incurred by Buyer
(less any earnings realized by Buyer on borrowed funds) for each day the Closing
is delayed and Buyer agrees at Seller's request to promptly repay any such
borrowed funds in the event the Closing does not occur at the time expected and,
in such event, Seller shall be required to comply with the notice procedures to
reschedule the Closing.

     (b) At the Closing:

          (i)  Seller shall deliver to Buyer (A) certificates representing
     Chicago Shares being sold to Buyer and (B) certificates representing
     Central Illinois Shares being sold to Buyer, duly endorsed and in form for
     transfer to Buyer; and

          (ii) Buyer shall pay to Seller, by wire transfer to an account
     designated by Seller in writing, immediately available funds in an amount
     equal to the Estimated Purchase Price.

     Section 2.5 Post-Closing Adjustment. (a) As soon as practicable, but in no
event later than 90 days following the Closing Date, Buyer shall, on a basis
consistent with the methods, principles, practices and policies

                                     -18-
<PAGE>

employed in the preparation and presentation of the Financial Statements and,
where applicable, the Chicago Cellular Expenditure Budgets or the Central
Illinois Expenditure Budgets, as the case may be, prepare and deliver to Seller
a statement (the "Closing Statement") showing the calculation of the Closing
Working Capital, the Closing Long Term Liabilities, the EBITDA Subscriber Amount
and the Schedule 2.2 Adjustment (the "Calculation").

     (b) After receipt of the Calculation, Seller shall have 30 days to review
the Calculation. Buyer shall provide Seller and its authorized representatives
reasonable access during normal business hours and without significant
disruption to the Business, to (1) all books, records and employees of Buyer and
its Subsidiaries having relevant information concerning the Calculation to the
extent that such information was used in the Calculation and (2) Buyer's
accountants who assisted Buyer in preparing the Calculation and such
accountants' relevant supporting workpapers. Unless Seller delivers written
notice to Buyer on or prior to the 30th day after Buyer's delivery of the
Calculation stating that Seller has objections to the Calculation and describing
any such objections with reasonable particularity (including a basis in the
books and records of the Companies or accounting principles for such objection),
Seller shall be deemed to have accepted and agreed to the Calculation. In
addition, any item included in the Calculation which is not objected to by
Seller shall be deemed to be accepted by Seller ("Resolved Items") and any
amounts included within such item shall be deemed to be final, binding and
conclusive. If Seller notifies Buyer of its objections to the Calculation,
Seller and Buyer shall, within 10 days (or such longer period as the parties may
agree) following such notice (the "Resolution Period"), attempt to resolve their
differences, and any written resolution by them as to any disputed amounts shall
be final, binding and conclusive.

     (c) Any amounts remaining in dispute at the conclusion of the Resolution
Period ("Unresolved Items") shall be submitted to KPMG LLP (such firm being
referred to as the "CPA Firm") or, if such firm shall be unable or unwilling to
serve in such capacity or if the parties shall otherwise mutually agree, such
other nationally recognized firm of independent accountants mutually agreed by
Seller and Buyer (and, in such case, such firm shall be deemed to be the CPA
Firm), within 10 days after the expiration of the Resolution Period. Each party
agrees to execute, if

                                     -19-
<PAGE>

requested by the CPA Firm, an engagement letter with the CPA Firm containing
reasonable terms. All fees and expenses relating to the work, if any, to be
performed by the CPA Firm shall be borne by Seller and Buyer in inverse
proportion to the allocation of the dollar amount of the Unresolved Items made
by the CPA Firm in favor of Seller or Buyer, as the case may be. The CPA Firm
shall act as an arbitrator and not as an expert to determine, based on the
provisions of this Section 2.5, only the Unresolved Items. The CPA Firm's
determination of the Unresolved Items shall be made within 30 days of the
submission of the Unresolved Items to the CPA Firm, and, together with a
calculation of the Closing Working Capital, the Closing Long Term Liabilities,
the EBITDA Subscriber Amount and the Schedule 2.2 Adjustment based upon the
amount of Resolved Items and the CPA Firm's determinations of the Unresolved
Items, shall be set forth in a written statement delivered to Seller and Buyer
by the CPA Firm and shall be final, binding and conclusive on the parties for
all purposes.

     (d) Within five Business Days following either (i) an agreement by Buyer
and Seller as to the Closing Working Capital, Closing Long Term Liabilities and
the EBITDA Subscriber Amount or (ii) the CPA Firm's determination of the Closing
Working Capital, the Closing Long Term Liabilities and the EBITDA Subscriber
Amount, Seller shall pay to Buyer the amount, if any, by which the Estimated
Purchase Price exceeds the final calculation of the Purchase Price determined in
accordance with Section 2.2 after resolution of all disputed items, or Buyer
shall pay to Seller the amount, if any, by which the final calculation of the
Purchase Price exceeds the Estimated Purchase Price (the "Post-Closing
Adjustment").

     (e) Any payments made pursuant to this Section 2.5 shall be made by wire
transfer of immediately available funds to an account indicated in writing by
the party to receive such funds and shall be accompanied by interest at the
Applicable Rate calculated on the basis of a year of 360 days for the actual
number of days elapsed, accrued from the Closing Date up to and including the
date of payment.

     (f) Any payments made in respect of the Post-Closing Adjustment shall be
deemed to be adjustments to the Central Illinois Purchase Price or the Chicago
Cellular Purchase Price in accordance with the portion of the

                                     -20-
<PAGE>

adjustment pursuant to Section 2.2 (Adjustment of the Base Purchase Price)
attributable to Chicago Cellular and Central Illinois Cellular.

                                  ARTICLE III

                   Representations and Warranties of Seller

     Except as otherwise set forth in the correspondingly numbered section or
schedule of the disclosure schedule delivered by Seller to Buyer on the date of
the execution of this Agreement (the "Seller Disclosure Schedule") and except,
if not set forth in the correspondingly numbered schedule of the Seller
Disclosure Schedule, the disclosures therein shall be deemed to be exceptions to
the representations and warranties of Seller to which a reasonable Person would
have considered such disclosure to be an exception, Seller represents and
warrants to Buyer as follows:

     Section 3.1 Organization and Authority of Seller. Seller is a corporation
duly organized, validly existing and in good standing under the laws of the
State of Delaware, has all requisite corporate or similar power and authority,
and has taken all corporate action necessary in order, to execute, deliver and
perform its obligations under this Agreement and the Ancillary Agreements. This
Agreement and the Ancillary Agreements are, or will be when executed, legal,
valid and binding obligations of Seller, enforceable in accordance with their
terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization,
moratorium and similar laws of general applicability relating to or affecting
creditors' rights and to general equity principles. The execution, delivery and
performance of this Agreement by Seller does not, and the consummation by the
Seller of the transactions contemplated hereby will not, constitute or result in
(A) a breach or violation of, or a default under the certificate of
incorporation or by-laws of the Seller or (B) assuming compliance with the
matters referred to in Sections 3.11 (Consents and Approvals) and 4.2 (Consents
and Approvals), a violation of any law, rule, regulation, judgment, injunction,
order, decree or other restriction of any court or Governmental Entity ("Law"),
except, in the case of clause (B) above, for any breach, violation or default
that would not be reasonably likely to be material in any individual case or in
the aggregate or to

                                     -21-
<PAGE>

prevent, materially delay or materially impair the ability of the Seller, the
Companies or any of their Subsidiaries to consummate the transactions
contemplated by this Agreement or any of the Ancillary Agreements.

     Section 3.2 Organization and Qualification of the Companies. Each of the
Companies is a corporation duly organized, validly existing and in good standing
under the laws of the State of Illinois and has the corporate power and
authority to own or lease its assets and to carry on its business substantially
as it is being conducted on the date hereof, and is duly qualified as a foreign
corporation to do business and is in good standing, in each jurisdiction where
the ownership or operation of its property and assets or the conduct of its
business requires such qualification, except where the failure to be so
qualified or in good standing would not be reasonably likely to have a Material
Adverse Effect. The consummation of the transactions contemplated hereby will
not constitute or result in (A) a breach or violation of, or a default under,
the articles of incorporation or by-laws or similar organizational documents of
the Companies or any of their respective Subsidiaries or (B) assuming compliance
with the matters referred to in Sections 3.11 (Consents and Approvals) and 4.2
(Consents and Approvals), a violation of any Law or governmental or non-
governmental permit or license to which the Companies or any of their respective
Subsidiaries are subject, except, in the case of clause (B) above, for any
breach, violation, default, acceleration or creation that would not be
reasonably likely to, either individually or in the aggregate, be material or
prevent, materially delay or materially impair the ability of the Seller to
consummate the transactions contemplated by this Agreement or any of the
Ancillary Agreements.

     Section 3.3 Capitalization of the Companies. (a) The authorized capital
stock of Chicago Cellular consists of 2,000 Chicago Shares of which one Chicago
Share is issued and outstanding. The issued and outstanding Chicago Share has
been duly authorized and validly issued, is fully paid and nonassessable and is
owned by Seller free and clear of any Encumbrances. There are no preemptive or
other outstanding rights, options, warrants, conversion rights, stock
appreciation rights, redemption rights, agreements, arrangements or commitments
to issue or sell any shares of capital stock or other securities of Chicago
Cellular or any of its Subsidiaries or any securities or

                                     -22-
<PAGE>

obligations convertible or exchangeable into or exercisable for, or giving any
Person a right to subscribe for or acquire, any securities of Chicago Cellular
or any of its Subsidiaries, and no securities or obligations evidencing such
rights are authorized, issued or outstanding. Chicago Cellular does not have
outstanding any bonds, debentures, notes or other obligations the holders of
which have the right to vote (or which are convertible into or exercisable for
securities having the right to vote) with the stockholders of Chicago Cellular
on any matter.

     (b) The authorized capital stock of Central Illinois Cellular consists of
one Central Illinois Share which is issued and outstanding. The issued and
outstanding Central Illinois Share has been duly authorized and validly issued,
is fully paid and nonassessable and is owned by Seller free and clear of any
Encumbrances. There are no preemptive or other outstanding rights, options,
warrants, conversion rights, stock appreciation rights, redemption rights,
agreements, arrangements or commitments to issue or sell any shares of capital
stock or other securities of Central Illinois Cellular or any of its
Subsidiaries or any securities or obligations convertible or exchangeable into
or exercisable for, or giving any Person a right to subscribe for or acquire,
any securities of Central Illinois Cellular or any of its Subsidiaries, and no
securities or obligations evidencing such rights are authorized, issued or
outstanding. Central Illinois Cellular does not have outstanding any bonds,
debentures, notes or other obligations the holders of which have the right to
vote (or which are convertible into or exercisable for securities having the
right to vote) with the stockholders of Central Illinois Cellular on any matter.

     (c) As of the date hereof and except as set forth in the Contracts listed
on Schedule 3.10(a)(vii), the Companies and their Subsidiaries are not subject
to capital calls with respect to any of their respective Subsidiaries. There
are no notices of capital calls outstanding which have not been satisfied as of
the date hereof.

     Section 3.4 Subsidiaries of the Companies; Minority Interests. (a) Schedule
3.4(a) hereto lists the name of each Subsidiary of Chicago Cellular, the equity
interest of Chicago Cellular or one of its Subsidiaries therein, together with
the jurisdiction of its incorporation or organization, as the case may be, and
to the Knowledge of

                                     -23-
<PAGE>

Seller, the name of each other record and beneficial holder of the shares of
capital stock or other similar equity interests of such Subsidiary. All shares
of capital stock or similar equity interests of each Subsidiary of Chicago
Cellular that are owned by Chicago Cellular or a Subsidiary of Chicago Cellular
are owned by Chicago Cellular or the applicable Subsidiary free and clear of all
Encumbrances, and all such capital stock is duly authorized, validly issued,
fully paid and nonassessable and all other such similar equity interests are
duly authorized, validly issued and fully paid. Each Subsidiary of Chicago
Cellular is a corporation or limited partnership, as the case may be, duly
organized or formed, as the case may be, validly existing and in good standing
under the laws of its jurisdiction of organization or formation, as the case may
be, has the power and authority to own or lease its assets and to carry on its
business substantially as it is being conducted as of the date hereof, and is
duly qualified as a foreign corporation or limited partnership to do business,
and is in good standing, in each jurisdiction where the ownership or operation
of its properties and assets or the conduct of its business requires such
qualification, except where the failure to be so qualified would not be
reasonably likely to have a Material Adverse Effect.

     (b) Schedule 3.4(b) hereto lists the name of each Subsidiary of Central
Illinois Cellular, the equity interest of Central Illinois Cellular or one of
its Subsidiaries therein, together with the jurisdiction of its incorporation or
organization, as the case may be, and to the Knowledge of Seller, the name of
each other record and beneficial holder of the shares of capital stock or other
similar equity interests of such Subsidiary. All shares of capital stock or
similar equity interests of each Subsidiary of Central Illinois Cellular that
are owned by Central Illinois Cellular or a Subsidiary of Central Illinois
Cellular are owned by Central Illinois Cellular or the applicable Subsidiary
free and clear of all Encumbrances, and all such capital stock is duly
authorized, validly issued, fully paid and nonassessable and all other such
similar equity interests are duly authorized, validly issued and fully paid.
Each Subsidiary of Central Illinois Cellular is a corporation or limited
partnership, as the case may be, duly organized or formed, as the case may be,
validly existing and in good standing under the laws of its jurisdiction of
organization or formation, as the case may be, has the power and authority to
own or lease its assets and to carry on its

                                     -24-
<PAGE>

business substantially as it is being conducted as of the date hereof, and is
duly qualified as a foreign corporation or limited partnership to do business,
and is in good standing, in each jurisdiction where the ownership or operation
of its properties and assets or the conduct of its business requires such
qualification, except where the failure to be so qualified would not be
reasonably likely to have a Material Adverse Effect.

     (c) All equity interests in any Person (other than the Subsidiaries of the
Companies) owned by the Companies or their Subsidiaries are set forth on
Schedule 3.4(c), including the type and amount of such equity interest. All
equity interests set forth on Schedule 3.4(c) are owned free and clear of any
Encumbrances either by one of the Companies or a Subsidiary of one of the
Companies.

     Section 3.5 Financial Statements. (a) Attached hereto as Schedule 3.5(a)
is a copy of the audited consolidated balance sheet of Chicago Cellular and its
Subsidiaries as of December 31, 1998 and the audited consolidated statements of
income, stockholders' equity and cash flows for Chicago Cellular and its
Subsidiaries for the year ended December 31, 1998 (collectively, with the notes
thereto, the "Chicago Cellular Financial Statements"). The Chicago Cellular
Financial Statements present fairly, in all material respects, the financial
position of Chicago Cellular and its Subsidiaries as of December 31, 1998, and
the results of operations of Chicago Cellular and its Subsidiaries for the year
ended December 31, 1998 and have been prepared in accordance with GAAP applied
on a basis consistent with past practice.

     (b) Attached hereto as Schedule 3.5(b) is a copy of the audited
consolidated balance sheet of Central Illinois Cellular and its Subsidiaries as
of December 31, 1998 and the audited statements of income, stockholders' equity
and cash flows for Central Illinois Cellular and its Subsidiaries for the year
ended December 31, 1998 (collectively, with the notes thereto, the "Central
Illinois Financial Statements" and, together with the Chicago Cellular
Financial Statements, the "Financial Statements"). The Central Illinois
Financial Statements present fairly, in all material respects, the financial
position of Central Illinois Cellular and its Subsidiaries as of December 31,
1998, and the results of operations of Central Illinois Cellular and its
Subsidiaries for the year ended

                                     -25-
<PAGE>

December 31, 1998 and have been prepared in accordance with GAAP applied on a
basis consistent with past practice.

     (c) Attached hereto as Schedule 3.5(c) is a copy of the audited balance
sheets and income statements for the years ended December 31, 1998 and 1997 for
the Chicago SMSA Limited Partnership, the Illinois SMSA Limited Partnership and
the Illinois RSA 6 and 7 Limited Partnership.

     (d) The Companies and their Subsidiaries do not have any liability or
obligation of any nature which is required to be disclosed in financial
statements prepared in accordance with GAAP (including the notes thereto) other
than those (i) set forth in the Financial Statements, (ii) incurred after
December 31, 1998 in the ordinary course of the Business consistent with past
practice and which would not be reasonably likely to have a Material Adverse
Effect or (iii) those liabilities relating to or arising out of the Business
for which any such Person shall become liable in accordance with the matters
contemplated in Sections 6.4 (Employee Benefit Plans), 6.7 (Company Assets),
6.11 (Litigation) and 6.14 (Contracts).

     (e) Except as set forth on Schedule 3.5(e), Metrocom does not have any
liabilities or obligations (whether accrued or not accrued, absolute,
contingent or otherwise).

     (f) Attached hereto as Schedule 3.5(f) is a pro forma balance sheet of
Companies and their Subsidiaries as of December 31, 1998 reflecting as pro forma
adjustments to the balance sheets as of such date included in the Financial
Statements the asset transfers, liability transfers and other transfers stated
in the notes thereto. Such pro forma balance sheets have been prepared in good
faith from the books and records of Seller and its Subsidiaries.

     (g) Attached hereto as Schedule 3.5(g) are true and correct copies of (a)
the capital expenditures budgets for Chicago Cellular and its Subsidiaries on a
consolidated basis for the twelve-month period ending December 31, 1999 and for
the twelve-month period ending December 31, 2000 (the "Chicago Expenditure
Budget") and (b) the capital expenditures budgets for Central Illinois Cellular
and its Subsidiaries on a consolidated basis for the twelve-month periods ending
December 31, 1999 and December 31, 2000 (the "Central Illinois Expenditure
Budgets").

                                     -26-
<PAGE>

     Section 3.6 Absence of Certain Changes or Events. Since December 31, 1998
(i) the Companies and their Subsidiaries have conducted their businesses, and
Seller has conducted the Business, taken together, in the ordinary course
consistent with past practice except to the extent arising out of or relating to
the consummation of the transactions contemplated by this Agreement, and (ii)
there has not been any change in the Companies' and their Subsidiaries'
businesses or results of operations which has resulted in or would be reasonably
likely to result in a Material Adverse Effect.

     Section 3.7 Communications Licenses. The Companies and their respective
Subsidiaries have been granted all Communications Licenses, except for those
Communications Licenses the failure of which to have been granted would not be
reasonably likely to be material. Schedule 3.7 sets forth a true, accurate and
complete list of the Communications Licenses held by the Companies and their
Subsidiaries and used directly in connection with the Business, and the identity
of the Person that holds each such Communications License. All Communications
Licenses are valid and in full force and effect, except where the failure to be
valid or in full force and effect would not be reasonably likely to be material.
The Companies and their respective Subsidiaries are not conducting the Business
in violation of any Communications License listed on Schedule 3.7, except for
those failures which, individually or in the aggregate, are not material. There
is not pending, nor to the Knowledge of Seller threatened, against the Companies
or any of their respective Subsidiaries, any application, action, petition,
objection or other pleading, or any proceeding, with the FCC, the ICC, the IURC
or any other Governmental Entity which questions or contests the validity of, or
nonrenewal or suspension of any Communications License which would be reasonably
likely to, either individually or in the aggregate be material.

     Section 3.8 Litigation. Except for the Consent Decree, as of the date
hereof, there are no (x) decrees, judgments, orders or awards to which the
Business or any of the assets of the Business are subject or (y) civil, criminal
or administrative claims, actions, suits, demands, proceedings or investigations
pending or to the Knowledge of Seller, threatened against the Business or the
Companies or any of their respective Subsidiaries, at law, in equity or
otherwise, in, before, or by, any court or Governmental

                                     -27-
<PAGE>

Entity or authority, except for such decrees, judgments, orders, awards, claims,
actions, suits, demands, proceedings or investigations which are not, in the
aggregate, material.

     Section 3.9  Compliance with Law and Licenses. The Companies and their
respective Subsidiaries (a) are conducting their respective businesses in
compliance, with all applicable Laws (other than Licenses except to the extent
relating to zoning matters), except for those failures to comply which,
individually or in the aggregate, are not material and (b) have obtained and are
in compliance with the terms of all Licenses, which are required for the
Companies and their Subsidiaries to conduct the Business, except for those the
failure to obtain or to comply with which would not be reasonably likely to
have, either individually or in the aggregate, a Material Adverse Effect; it
being understood, in each case, that nothing set forth in this Section 3.9 is
intended to address any compliance issue that is the subject of any other
representation or warranty set forth herein.

     Section 3.10 Contracts. (a) Schedule 3.10(a) lists the following Contracts
(A) to which either of the Companies or one of their respective Subsidiaries is
a party or (B) to which Seller or an Affiliate of Seller is a party and which
relates exclusively to the Business:

          (i)   any agreement which materially restricts or materially limits
     the ability of either of the Companies or any of their respective
     Subsidiaries or Affiliates to freely conduct cellular telephone operations
     or otherwise operate in any market;

          (ii)  any collective bargaining agreement and any written employment
     agreement;

          (iii) all agreements which involved payments to or from the Companies
     or any of their Subsidiaries or on behalf of the Business of more than
     $5,000,000 during the twelve-month period ended December 31, 1998;

          (iv)  all agreements which specifically provide for payments to or
     from the Companies or any of their Subsidiaries or on behalf of the
     Business of more than $5,000,000 during any twelve-month period beginning
     after December 31, 1998;

                                     -28-
<PAGE>

          (v)    all agreements with respect to outstanding indebtedness for
     money borrowed or any guaranty thereof;

          (vi)   all leases of real property, with an annual rental payment in
     excess of $30,000 and all cell site leases;

          (vii)  all partnership or joint venture agreements or other agreements
     relating to the management or control of any such partnership or joint
     venture;

          (viii) volume customer Contracts with each of the top 50 customers of
     the Business (by revenue) during the twelve months ended December 31,
     1998, including any national account agreements that meet such criterion;

          (ix)   all distributor agreements which generated gross line additions
     in excess of 1,000 during the twelve months ended December 31, 1998 (such
     agreements represent approximately 70% of gross line additions generated by
     all agents/distributors for the Business during such period) and all
     reseller agreements;

          (x)    all sponsorship agreements;

          (xi)   all interconnection agreements;

          (xii)  all Contracts which materially restrict the ownership of any
     material asset owned by the Companies or their Subsidiaries;

          (xiii) any Contract with an Affiliate listed on Schedule 3.18 (which
     is incorporated herein by reference); and

          (xiv)  any roaming agreements not terminable at the option of either
     party thereto on 30 days or less notice.

     Notwithstanding the foregoing, Schedule 3.10(a) (other than with respect
to subclauses (i), (ii) and (vii) above) shall be deemed updated as of the
Closing Date to delete any Contracts meeting any of the criteria set forth

                                     -29-
<PAGE>

above which have been terminated, have expired or not been renewed between the
date hereof and the Closing Date and to add any Contracts meeting such criteria
entered into between the date hereof and the Closing Date, provided in each case
such Contracts have been entered into, terminated or expired in the ordinary
course of business of the Companies and their Subsidiaries consistent with past
practice.

     (b) Seller has made available to Buyer a correct and complete copy of each
Contract listed on Schedule 3.10(a) as of the date hereof, together with any and
all amendments or modifications thereto. Each Contract listed on Schedule
3.10(a) is valid, binding, enforceable, and in full force and effect, the
Companies or the applicable Subsidiary are not in breach or default under any
such Contract and no event has occurred which, with notice or lapse of time or
both, would constitute such a breach or default, or permit termination,
modification, or acceleration, under such Contract, except where the failure to
be so valid, binding, enforceable or in full force and effect or such breach or
default, termination, modification or acceleration would not be, either
individually or in the aggregate, reasonably likely to be material.

     (c) The execution, delivery and performance of this Agreement and the
Ancillary Agreements by Seller does not, and the consummation by the Seller of
the transactions contemplated hereby and thereby will not, constitute or result
in a breach or violation of, or a default under, the acceleration of any
obligations, a right of early termination, a right of first refusal or the
creation of an Encumbrance (with or without notice, lapse of time or both) on
the assets of Seller, the Companies or any of the Subsidiaries of the Company
pursuant to, any Contracts set forth on Schedule 3.10(a), except for any breach,
violation, default, right, acceleration or creation that would not be reasonably
likely to be material in any individual case or in the aggregate or to prevent,
materially delay or materially impair the ability of Seller, the Companies or
any of their Subsidiaries to consummate the transactions contemplated by this
Agreement or any of the Ancillary Agreements.

     (d) Schedule 3.10(d) lists all material Contracts which are not listed on
Schedule 3.10(a) to which Seller or any of its Affiliates are a party (and none
of the Companies or their Subsidiaries are parties) pursuant to which the

                                     -30-
<PAGE>

Companies or any of their Subsidiaries provide or receive goods, products,
services or other benefits.

     Section 3.11 Consents and Approvals. Except for the filings, permits,
authorizations, consents, approvals and/or notices (A) set forth in Schedule
3.11, (B) required under the HSR Act, (C) required by the applicable require
ments of the FCC, or under the Communications Act or (D) required by the state
public utilities commissions or similar communications or utility regulatory
bodies having jurisdiction over Seller, the Companies and the Companies'
Subsidiaries (such consents referred to in clauses (C) and (D) of this Section
3.11 being collectively referred to herein as, the "Cellular Authorizations"),
no filings, permits, authorizations, consents, approvals and/or notices are
required to be made or obtained by Seller, the Companies or any of their
respective Subsidiaries with or from, as the case may be, any Governmental
Entity, in connection with the execution and delivery of this Agreement by
Seller and the consummation by Seller of the transactions contemplated hereby,
except those for which the failure to make or obtain, as the case may be, would
not be, either individually or in the aggregate, reasonably likely to be
materially adverse to the Companies and their Subsidiaries, taken as a whole or
be reasonably likely to prevent, materially delay or materially impair the
ability of Seller to consummate the transactions contemplated by this Agreement.
To the Knowledge of Seller, no issue relating to Seller or its Affiliates exists
that would inhibit Buyer and Seller from promptly obtaining any material
Governmental Consent.

     Section 3.12 Tax Matters. (a) All Tax Returns that are required to be filed
by or with respect to each of the Companies and their respective Subsidiaries
have been duly and timely filed or, where not so filed, are covered under a
valid extension that has been obtained therefor, (b) all Taxes shown to be due
on the Tax Returns referred to in clause (a) have been paid in full, and there
are no material liens or encumbrances on any of the assets of the Companies or
any of their Subsidiaries that arose in connection with the failure or alleged
failure to pay any Tax, (c) the Tax Returns referred to in clause (a) are not
subject to examination currently by the IRS or the appropriate state, local or
foreign taxing authority, and no written notice has been received by Seller, any
of the Companies, or any of their Subsidiaries with respect to any actual or
threatened

                                     -31-
<PAGE>

audit or examination, (d) all deficiencies asserted or assessments made as a
result of the examinations of any of the Tax Returns referred to in clause (a)
have been paid in full, (e) no issues that have been raised by the relevant
taxing authority in connection with the examination of any of the Tax Returns
referred to in clause (a) are currently pending, (f) no waivers of statutes of
limitation have been given by or requested with respect to any Taxes of the
Companies or any of their respective Subsidiaries, (g) none of the Companies or
any of their respective Subsidiaries is obligated to make any material payments,
or is a party to an agreement that under certain circumstances could obligate it
to make any material payments that will not be deductible under section 280G
(and for the purposes of this Section 3.12(g), the term material shall mean any
payment (individually or in the aggregate) of $300,000 or more), (h) none of the
Companies or any of their Subsidiaries have filed a consent under Section 341(f)
of the Code concerning collapsible corporations (i) none of the Companies or any
of their Subsidiaries have been a party to any distribution occurring during the
last 3 years in which the parties to such distribution treated the distribution
as one to which Section 355 of the Code applied, and (j) to the Knowledge of
Seller, each of the Companies and their Subsidiaries has withheld and paid all
material Taxes required to have been withheld and paid by them in connection
with (1) amounts paid or owing to any employee, independent contractor,
creditor, stockholder, or other third party, and (2) amounts received from
customers or other third parties (including, but not limited to, sales, use and
excise taxes).

     Section 3.13 Labor Matters. As of the date hereof, there is no pending,
or, to the Knowledge of Seller, threatened, strike, walkout or other work
stoppage or any union organizing effort by or respecting the employees of
Seller, the Companies or any of their respective Subsidiaries who perform work
in connection with the Business.

     Section 3.14 Employee Benefits.

     (a) Schedule 3.14(a) hereto contains a complete and accurate list of each
employee benefit, stock purchase, stock option, severance, change-in-control,
fringe benefit, bonus, incentive and deferred compensation plan, agreement,
policy or other arrangement maintained by Parent or its Subsidiaries which
covers current or former employees of

                                     -32-
<PAGE>

Seller, the Companies or any of their respective Subsidiaries who perform or
have performed work for the Business (the "Benefit Plans"). There are no
employee benefit plans, other than the Benefit Plans, which cover the current
and former employees of the Seller, the Companies or any of their respective
Subsidiaries who perform or have performed work for the Business. Copies of all
Benefit Plans and all amendments thereto and of all summary plan descriptions or
summaries of material modifications have been delivered or made available to
Buyer.

     (b) All Benefit Plans are in substantial compliance with all applicable
laws, including the Code and the Employee Retirement Income Security Act of
1974, as amended ("ERISA"). The Parent has received a favorable determination
letter from the IRS with respect to the qualified status of each Benefit Plan
which is an "employee pension benefit plan" within the meaning of Section 3(2)
of ERISA (a "Pension Plan") and which is intended to be qualified under Section
401(a) of the Code and Seller does not have Knowledge of any circumstances which
are reasonably likely to cause the revocation of such letter. There is no
material pending or, to the Knowledge of Seller, threatened action, suit or
claim relating to the Benefit Plans that could reasonably be expected to
materially increase its liability with respect to such Benefit Plans. None of
Parent, Seller, the Companies or any of their respective Subsidiaries has
engaged in any transaction with respect to any Benefit Plan that is reasonably
likely to subject the Companies or any of their respective Subsidiaries to a
material tax or penalty imposed by Section 4975 of the Code.

     (c) No liability under Title IV of ERISA has been or is expected to be
incurred by either the Companies or any of their respective Subsidiaries with
respect to any ongoing, frozen or terminated "single-employer plan", within the
meaning of Section 4001(a)(15) of ERISA, currently or formerly maintained by any
of them, or the single-employer plan of any entity which is considered one
employer with the Companies under Section 4001 of ERISA or Section 414 of the
Code (an "ERISA Affiliate"), other than the payment of premiums to the Pension
Benefit Guaranty Corporation contributed to by the Companies or any of their
respective Subsidiaries or any ERISA Affiliate. Neither of the Companies nor any
of their respective Subsidiaries has contributed, or been obligated to
contribute, to a "multiemployer plan" (within the meaning of Section 3(37) of

                                     -33-
<PAGE>

ERISA) at any time during the six-year period prior to the date hereof, or
otherwise has any liability to any multiemployer plan.

     (d) Neither of the Companies nor any of their respective Subsidiaries has
any obligations for retiree health and life benefits under any Benefit Plan.

     (e) Except as set forth on Schedule 3.14(e), the consummation of the
transactions contemplated by this Agreement will not (x) entitle any of the
employees of the Companies or any of their respective Subsidiaries to severance
pay or (y) accelerate or provide any other rights or credits under, or increase
the amount payable or trigger any other obligation pursuant to, any of the
Benefit Plans. The adoption of the Mirror Severance Plan in accordance with the
terms of Section 6.4(b) will not trigger any entitlement to or eligibility for
severance benefits for the Transferred Employees.

     Section 3.15 Environmental Matters. The Business and the Companies and
their Subsidiaries (i) are in compliance in all material respects with
applicable Environmental Laws; (ii) as of the date hereof have not received any
written notices from any Governmental Entity alleging the material violation of
any applicable Environmental Law, and to the Knowledge of Seller, are not aware
of any conditions which materially violate any applicable Environmental Law;
(iii) are not the subject of any material court order, administrative order or
decree arising under any Environmental Law; (iv) have not generated, stored,
used, emitted, discharged or disposed of any Hazardous Substance except in
material compliance with applicable Environmental Laws and, to the Knowledge of
Seller, are not aware of the presence of Hazardous Substances in the structures,
soil, subsoil, sediments, and groundwater at, on or beneath the properties owned
or leased by the Companies and their Subsidiaries or to be transferred to the
Companies and their Subsidiaries pursuant to the terms of this Agreement which
would reasonably be expected to require remediation under applicable
Environmental Laws; and (v) have constructed all facilities, equipment and
structures in material compliance in all material respects with applicable
Environmental Laws. This Section 3.15 constitutes the sole representation and
warranty of the Seller with respect to any Environmental Law or any Hazardous
Substance.

                                     -34-
<PAGE>

     Section 3.16 Property and Leases.

     Schedule 3.16(a) contains a list of all real property owned by the
Companies or any of their respective Subsidiaries and real property leased
pursuant to lease agreements set forth on Schedule 3.10(a) (which includes all
cell site leases used in the Business) and the address of any such owned real
property. The Companies and their Subsidiaries have marketable title to all
material owned real property set forth on Schedule 3.16(a), and such owned real
property and all cellular switches and cell site towers and equipment affixed
thereto and owned by the Companies and their Subsidiaries are free and clear of
all Encumbrances, except for (i) materialmen's, mechanics', carriers', workmen's
and repairmen's liens and other similar liens arising in the ordinary course of
business, (ii) pledges or deposits to secure obligations under Workers'
Compensation laws or similar legislation or to secure public or statutory
obligations, (iii) Encumbrances for Taxes or assessments not yet delinquent or
being contested in good faith, (iv) imperfections of title and Encumbrances, if
any, that do not materially detract from the value, or materially interfere with
the use or marketability of the property affected thereby, (v) Encumbrances set
forth on the title insurance policies relating to such properties and (vi)
rights reserved to or vested in any Governmental Entity to control or regulate
any such entity's property or assets in any manner. Each real property site
which is a leased cell site or is owned real property set forth on Schedule
3.16(a) has lawful rights of ingress and egress to permit sufficient access to
such sites from public roadways, except where the failure to have such rights
would not be material. All cellular switches and cell site towers and equipment
affixed thereto owned by the Companies and their Subsidiaries are in good
operating condition and repair, reasonable wear and tear excepted.

     Section 3.17 Accounts Receivables; Debt. Neither the Companies nor any of
their Subsidiaries have sold or assigned any of their respective accounts
receivable (whether or not reflected in the Financial Statements) to any third
party during the past two years.

     Section 3.18 Affiliate Transactions. Schedule 3.18 lists all written
Contracts between the Companies or one of their Subsidiaries and any Affiliates
(other than the Companies and one of their Subsidiaries) of Seller.

                                     -35-
<PAGE>

     Section 3.19 Year 2000 Compliance. Seller has developed a plan (the "Y2K
Plan") designed to confirm that all computer software and systems (including
hardware, firmware, operating system software, utilities, embedded processors
and application's software) used in and material to the Business and owned by
Seller, the Companies or their Subsidiaries (the "Systems") are designed to
operate during and after the calendar year 2000 to accurately process data
(including but not limited to calculating, comparing and sequencing) from, into
and between the twentieth and twenty-first centuries, including leap year
calculations ("Year 2000 Compliant"), and Seller is using its reasonable best
efforts to implement the Y2K Plan with respect to the Business in accordance
with the terms thereof. Seller has delivered a true and complete copy of the Y2K
Plan to Buyer. To the Knowledge of Seller (i) the Y2K Plan, when fully
implemented, will render the Systems Year 2000 Compliant in all material
respects, (ii) no problems have been identified that are not capable of being
remedied which could reasonably be expected to result in the Systems not being
Year 2000 Compliant in any material respect and (iii) Seller has, consistent
with industry practice, inquired of all of the vendors and suppliers of computer
software and systems as to whether such vendors and suppliers are taking
reasonable steps to confirm that their systems and software are Year 2000
Compliant and as of the date hereof no material problems have been reported to
Seller or any of its Affiliates.

     Section 3.20 Ability to Conduct Business. The (i) assets listed on
Schedule 6.7 (Company Assets) and being transferred to the Companies and their
Subsidiaries on or before the Closing Date, (ii) tangible and intangible assets
currently leased or owned by the Companies and their Subsidiaries and to be
retained by the Companies or any of their Subsidiaries after the Closing Date,
(iii) services to be provided and assets to be made available pursuant to the
Ancillary Agreements (which in the case of the Transition Services Agreement
shall include only those services and assets set forth on the schedules thereto
as in effect on the date hereof) and (iv) services and arrangements and assets
set forth on Schedule 3.20 (including those provided by third parties), taken
together constitute all of the tangible and intangible assets, services and
arrangements that are required to conduct the Business consistent with levels of
performance as of the date hereof (it being understood and agreed that nothing
set forth in this

                                     -36-
<PAGE>

Section 3.20 constitutes a representation or warranty that the Business can or
will be operated at such performance levels following the Closing Date) or are
otherwise used exclusively in the Business. Except for the services and assets
provided under the Ancillary Agreements and the Trademark License Agreement and
any services and arrangements set forth on Schedule 3.20, no services or assets
required to conduct the Business are provided through arrangements with Seller
or any of its Affiliates (other than the Companies and their Subsidiaries).

     Section 3.21 Brokers and Finders. None of Seller, the Companies or any of
the Companies' respective Subsidiaries or any of their respective Affiliates
have employed any broker, finder, consultant or intermediary in connection with
the transactions contemplated by this Agreement who would be entitled to a
broker's, finder's or similar fee or commission in connection therewith or upon
the consummation thereof.

     Section 3.22 No Other Representations or Warranties. Except for the
representations and warranties contained in this Article III, neither Seller,
the Companies, any Subsidiary of either of the Companies nor any other Person
makes any other express or implied representation or warranty on behalf of
Seller, the Companies or any Subsidiary of either of the Companies.

                                  ARTICLE IV

                    Representations and Warranties of Buyer

     Except as set forth in the correspondingly numbered Section of the
disclosure schedule delivered by Buyer to Seller on the date of this Agreement
(the "Buyer Disclosure Schedule") and except, if not set forth in the
correspondingly numbered section of the Buyer Disclosure Schedule, the
disclosures therein shall be deemed to be exceptions to the representations and
warranties of Buyer to which a reasonable Person would have considered such
disclosure to be an exception, Buyer represents and warrants to Seller as
follows:

     Section 4.1 Organization and Authority of Buyer and Buyer Parent. Buyer is
a corporation duly organized, validly existing and in good standing under the
laws of the

                                     -37-
<PAGE>

State of Delaware; Buyer Parent is a corporation duly organized, validly
existing and in good standing under the laws of the State of New York and each
of Buyer; and Buyer Parent has all requisite corporate or similar power and
authority, and has taken all corporate action necessary in order, to execute,
deliver and perform its obligations under this Agreement and, in the case of
Buyer, the Ancillary Agreements. This Agreement is a legal, valid and binding
obligation of each of Buyer and Buyer Parent, enforceable in accordance with its
terms, subject to bankruptcy, insolvency, fraudulent transfer, reorganization,
moratorium and similar laws of general applicability relating to or affecting
creditors' rights and to general equity principles. The execution, delivery and
performance of this Agreement by each of Buyer and Buyer Parent does not, and
the consummation by Buyer and Buyer Parent of the transactions contemplated
hereby will not, constitute or result in (a) a breach or violation of, or a
default under, the certificate of incorporation or by-laws of Buyer or Buyer
Parent, (b) a breach or violation of, or a default under, a right of early
termination, or right of first refusal the acceleration of any obligations or
the creation of any Encumbrance on the assets of Buyer or Buyer Parent (with or
without notice, lapse of time or both) pursuant to, any Contracts binding upon
Buyer or Buyer Parent or (c) assuming compliance with the matters referred to in
Sections 3.11 (Consents and Approvals) and 4.2 (Consents and Approvals), a
violation of any Law or governmental or non-governmental permit or license to
which Buyer or Buyer Parent is subject, except, in the case of clause (b) or (c)
above, for any breach, violation, default, acceleration or creation that would
not be reasonably likely to either, individually or in the aggregate, be
material or materially delay or materially impair the ability of Buyer or Buyer
Parent to consummate the transactions contemplated by this Agreement or any of
the Ancillary Agreements.

     Section 4.2 Consents and Approvals. Except for the filings, permits,
authorizations, consents, approvals and/or notices (a) set forth in Schedule
4.2, (b) required under the HSR Act or (c) required to obtain the Cellular
Authorizations, no filings, permits, authorizations, consents, approvals or
notices are required to be made or obtained by Buyer or any of its Subsidiaries
with or from, as the case may be, any Governmental Entity, in connection with
the execution and delivery of this Agreement by Buyer and the consummation by
Buyer of the transactions

                                     -38-
<PAGE>

contemplated hereby, except those for which the failure to make or obtain would
not be, either individually or in the aggregate, reasonably likely to be
material or reasonably likely to prevent, materially delay or materially impair
the ability of Buyer to consummate the transactions contemplated by this
Agreement.

     Section 4.3 Brokers and Finders. Buyer and its Subsidiaries have not
employed any broker, finder, consultant or intermediary in connection with the
transactions contemplated by this Agreement who would be entitled to a broker's,
finder's or similar fee or commission in connection therewith or upon the
consummation thereof, or if the Closing does not occur.

     Section 4.4 Financial Capability. Buyer has sufficient funds to purchase
the Shares on the terms and conditions contemplated by this Agreement and to
consummate the transactions contemplated hereby and has sufficient funds to
perform its obligations and the obligations of the Companies (including any
obligations the Companies may have with respect to their Subsidiaries) after
the Closing Date.

     Section 4.5 Securities Act. Buyer is acquiring the Shares solely for the
purpose of investment and not with a view to, or for sale in connection with,
any distribution thereof in violation of the Securities Act. Buyer acknowledges
that the Shares are not registered under the Securities Act or any applicable
state securities law, and that such Shares may not be transferred, sold or
otherwise disposed of except pursuant to the registration provisions of the
Securities Act or pursuant to an applicable exemption therefrom and pursuant to
state securities laws and regulations as applicable.

     Section 4.6 Litigation. Except for the Consent Decree, as of the date
hereof, there are no (x) decrees, judgments, orders or awards to which Buyer or
its properties are subject to or (y) civil, criminal or administrative claims,
actions, suits, demands, proceedings or investigations pending or to the
Knowledge of Buyer threatened against Buyer or any of its Subsidiaries, at law,
in equity or otherwise, in, before, or by, any court or Governmental Entity or
authority, except for such decrees, judgments, orders, awards, claims, actions,
suits, demands, proceedings, or investigations which would not, in the
aggregate, be reasonably likely to prevent, materially delay

                                     -39-
<PAGE>

or materially impair the ability of Buyer to consummate the transactions
contemplated hereby.

     Section 4.7 Investigation by Buyer. Buyer acknowledges that it is a
sophisticated purchaser of businesses and has been given sufficient access to
all information with respect to the Companies and their respective Subsidiaries
requested by Buyer and, in entering into this Agreement, has not relied upon
anything other than the representations and warranties of Seller set forth in
Article III. Buyer acknowledges that no other representations and warranties of
Seller other than as are set forth in Article III are required by Buyer to enter
into this Agreement. Buyer acknowledges that none of Parent, Seller, the
Companies, the Subsidiaries of the Companies or any other Person shall have any
liability with respect to the Confidential Information Memoranda or any
information with respect to the Companies or their respective Subsidiaries made
available to Buyer prior to the date hereof; provided, that the foregoing shall
not limit the scope of any representation or warranty contained in this
Agreement or any Ancillary Agreement.

     Section 4.8 Governmental Consents. To the Knowledge of Buyer no issue
relating to Buyer or its Affiliates exists that would inhibit Buyer and Seller
from promptly obtaining any material Government Consent.

     Section 4.9 No Other Representations or Warranties. Except for the
representations and warranties contained in this Article IV, neither Buyer nor
any other Person makes any other express or implied representation or warranty
on behalf of Buyer.

                                   ARTICLE V

                                  Tax Matters

     Section 5.1 Liability for Taxes and Related Matters.

     (a) Seller's Indemnification of Buyer. Seller shall be liable for and
shall indemnify Buyer for all Taxes (other than Transfer Taxes, which are
provided for in Section 5.2)(i) attributable to, imposed on, or for which the
Companies or any of their respective Subsidiaries may

                                     -40-
<PAGE>

otherwise be liable for events occurring or periods ending on or before the
Closing Date (except for Tax liabilities attributable to extraordinary events
caused by Buyer or any of its Affiliates (including the Companies and any of
their Subsidiaries at any time after the time of the Closing) occurring outside
of the ordinary course of business on the Closing Date, but after the Closing,
and that are not contemplated by this Agreement), (ii) with respect to any
taxable year or period beginning on or before and ending after the Closing Date,
the portion of such taxable year or period ending on and including the Closing
Date (except for Tax liabilities attributable to extraordinary events caused by
Buyer or any of its Affiliates (including the Companies and any of their
Subsidiaries at any time after the time of the Closing) occurring outside of the
ordinary course of business on the Closing Date, but after the Closing, and that
are not contemplated by this Agreement), and (iii) attributable to any Section
338(h)(10) Election.

     (b) Buyer's Indemnification of Seller. Buyer shall be liable for and
indemnify Seller for the Taxes of the Companies or any of their respective
Subsidiaries for any taxable year or period that begins after the Closing Date
and, with respect to any taxable year or period beginning on or before and
ending after the Closing Date, the portion of such taxable year or period
beginning after the Closing Date. Buyer shall be entitled to any refund of Taxes
of the Companies or any of their respective Subsidiaries received for such
periods. Buyer shall also be liable for and indemnify Seller for any and all Tax
liabilities attributable to extraordinary events caused by Buyer or any of its
Affiliates (including the Companies and any of their Subsidiaries at any time
after the time of the Closing) occurring outside of the ordinary course of
business on the Closing Date, but after the Closing, that are not contemplated
by this Agreement.

     (c) Taxes for Short Taxable Year. For purposes of subsections (a) and (b)
of this Section 5.1, whenever it is necessary to determine the liability for
Taxes of the Companies or any of their Subsidiaries for a portion of a taxable
year or period that begins on or before and ends after the Closing Date, the
determination of the Taxes of the Companies or any of their respective
Subsidiaries for the portion of the year or period ending on, and the portion of
the year or period beginning after, the Closing Date generally shall be
determined by assuming that each of the

                                     -41-
<PAGE>

Companies and their Subsidiaries had a taxable year or period which ended on
the Closing Date.

     For purposes of this Section 5.1(c), in the case of any Taxes (other than
Transfer Taxes) that are imposed on a periodic basis and are payable for a
taxable period that includes (but does not end on) the Closing Date, the portion
of such Tax which relates to the portion of such taxable period ending on the
Closing Date shall (x) in the case of any Taxes other than Taxes based upon or
related to income, receipts or the sale or transfer of any property, be deemed
to be the amount of such Tax for the entire taxable period multiplied by a
fraction the numerator of which is the number of days in the taxable period
ending on the Closing Date and the denominator of which is the number of days in
the entire taxable period, and (y) in the case of any Tax based upon or related
to income, receipts or the sale or transfer of any property, be deemed equal to
the amount which would be payable if the relevant taxable period ended on the
Closing Date (except that Tax liabilities attributable to extraordinary events
caused by Buyer or any of its Affiliates (including the Companies and any of
their Subsidiaries at any time after the time of the Closing) occurring outside
of the ordinary course of business on the Closing Date, but after the Closing,
and that are not contemplated by this Agreement shall be borne by Buyer).

     (d) Partnership Subsidiaries. For purposes of subsections (a), (b) and (c)
of this Section 5.1, any liability to indemnify or right to refund with respect
to a Tax imposed on a Subsidiary that is a partnership shall be limited to the
Subsidiary's liability for Taxes or right to refund of Taxes multiplied by the
percentage used to allocate the Subsidiary's taxable income (i) to Seller and
its Affiliates for purposes of subsection (a), and (ii) to Buyer and its
Affiliates for purposes of subsection (b) unless the relevant taxing authority
actually collects additional Taxes from one of the Companies or one of their
Subsidiaries because such Company or Subsidiary is general partner of a
Subsidiary that is a partnership, and such Company or Subsidiary is actually
unable to collect such Taxes from another partner (in which case the liability
of Buyer or Seller, as the case may be, shall not be limited by such
percentage).

                                     -42-
<PAGE>

     (e) Adjustment to Purchase Price. Any payment made to Buyer or Seller
under this Article V will be treated as an adjustment to the Purchase Price.

     (f) Carrybacks. Following the Closing, Buyer and the Companies shall, to
the extent permissible, waive the right to carryback any losses, credits or
similar items attributable to the Companies and from a taxable year or period
that begins after the Closing Date to a taxable year or period that ends on or
before the Closing Date.

     (g) Tax Returns. Seller shall file or cause to be filed when due all Tax
Returns that are required to be filed by or with respect to any of the Companies
or any of their Subsidiaries for taxable years or periods ending on or before
the Closing Date and shall pay any Taxes due in respect of such Tax Returns.
Buyer shall file or cause to be filed when due all Tax Returns that are required
to be filed by or with respect to the Companies or any of their respective
Subsidiaries for taxable years or periods ending after the Closing Date and
shall remit any Taxes due in respect of such Tax Returns. With respect to any
Tax Return required to be filed by Buyer or Seller with respect to the Company
and Subsidiaries and as to which an amount of Tax is allocable to the other
party under Section 5.1(a) or (b) hereof, the filing party shall provide the
other party with a copy of such completed Tax Return and a statement certifying
the amount of Tax shown on such Tax Return that is allocable to such other party
pursuant to the principles of this Section 5.1, together with appropriate
supporting information and schedules, at least 20 Business Days prior to the due
date (including any extension thereof) for the filing of such Tax Return (or in
any event as soon as practicable) and such other party shall have the right to
review and comment on such Tax Return and statement prior to the filing of such
Tax Return. Tax Returns of the Companies and their Subsidiaries not yet filed
for any taxable period that begins on or before the Closing Date shall be
prepared in a manner consistent with past practices employed with respect to the
Companies and their Subsidiaries, except (x) to the extent counsel for the
filing party determines there is no reasonable basis in law therefor, (y) to the
extent there would be no material adverse consequences to the non-filing party
or its Affiliates, or (z) in the case that the filing party obtains the non-
filing party's prior written consent (which consent shall not be unreasonably
withheld or delayed). Payment by Buyer and Seller of any amounts due

                                     -43-
<PAGE>

under this Article V in respect of Taxes shall be made (i) at least 10 Business
Days before the due date of the applicable estimated or final Tax Return
required to be filed by Buyer for a period ending after the Closing Date for
which Seller is responsible for Taxes under Section 5.1(a), without regard to
whether the Tax Return shows a net Tax due for such period, and (ii) within 3
Business Days following an agreement between Buyer and Seller that an indemnity
amount is payable, an assessment of a Tax (which has not been disputed within
the prescribed time) by a taxing authority, or a "determination" as defined in
Section 1313(a) of the Code.

     (h) Contest Provisions. (i) Buyer shall promptly notify Seller in writing
upon receipt by Buyer, any of its Affiliates or the Companies or any of their
respective Subsidiaries of written notice of any pending or threatened federal,
state, local or foreign Tax audits, claims for Taxes or assessments which may
affect the Tax liabilities of the Companies or any of their respective
Subsidiaries for which Seller would be required to indemnify Buyer pursuant to
Section 5.1(a) or Section 5.1(i), provided that failure to comply with this
provision shall not affect Buyer's right to indemnification hereunder except to
the extent Seller shall be prejudiced thereby.

          (ii)  Subject to the provisions of Section 5.1(h)(iii), Seller shall
have the sole right to represent the Companies or any of their respective
Subsidiaries' interests in any Tax audit or administrative or court proceeding
relating to taxable periods ending on or before the Closing Date, and to employ
counsel of its choice at its expense.

          (iii) With respect to a proposed adjustment for a period in which both
Seller and Buyer could be liable, (A) each party may participate in the audit
or proceeding, and (B) that portion of the audit or proceeding shall be
controlled by that party which would bear the burden of the greater portion of
the sum of the adjustment and any corresponding adjustments that may reasonably
be anticipated for future taxable periods. The party not controlling such audit
or proceeding may, with the written consent of the other party and at its sole
expense, assume control of such audit or proceeding.

                                     -44-
<PAGE>

          (iv) Neither Buyer nor Seller shall enter into any compromise or agree
to settle any claim pursuant to any Tax audit or proceeding which would
adversely affect the other party for a particular taxable year without the
written consent of the other party, which consent may not be unreasonably
withheld. Buyer and Seller agree to cooperate, and Buyer agrees to cause the
Company to cooperate, in the defense against or compromise of any claim in any
audit or proceeding.

     (i) Breach of Article V Representation or Obligation. Each of Buyer and
Seller shall indemnify the other for any Losses, Taxes or loss of Tax benefits
that result from or are attributable to a breach of a representation or a
failure to perform obligations set forth in this Article V. If a liability under
this Article V is in respect of costs or expenses other than Taxes, payment by
Buyer or Seller of any amounts due under this Article V shall be made within 5
Business Days after the date when the indemnifying party is notified by the
indemnified party that the indemnified party has a liability for the
determinable amount under this Article V and is provided with calculations or
other materials supporting such liability.

     Section 5.2 Transfer Taxes. Notwithstanding the provisions of Section 5.1,
all excise, sales, use, transfer, documentary filing and other similar Taxes
which may be imposed or assessed as a result of Buyer's acquisition of the
Shares ("Transfer Taxes") shall be borne 50% by Buyer and 50% by Seller.

     Section 5.3 Information to be Provided by Buyer. With respect to any
taxable year of the Companies or any of their respective Subsidiaries for which
Seller is required to file a Tax Return pursuant to Section 5.1(g) hereof and
for the period prior to the Closing Date in any taxable year of the Companies or
any of their respective Subsidiaries in which the Closing occurs, Buyer shall
promptly cause the Companies or any of their respective Subsidiaries to prepare
and provide to Seller a package of tax information materials (the "Tax
Package"), which shall be completed in accordance with past practice of the
Companies or the relevant Subsidiary including past practice as to providing the
information, schedules and work papers and as to the method of computation of
separate taxable income or other relevant measure of income. Buyer shall cause
the Tax Package for the portion of the taxable period

                                      -45-
<PAGE>

ending on the Closing Date to be delivered to Seller within 120 days after the
Closing Date.

     Section 5.4 Assistance and Cooperation. After the Closing Date, each of
Seller and Buyer shall:

     (a) assist (and cause their respective Affiliates to assist) the other
party in preparing any Tax Returns or reports for which such other party is
responsible for preparing and filing in accordance with this Article V;

     (b) cooperate fully in preparing for any audits of, or disputes with taxing
authorities regarding, any Tax Returns of the Companies or any of their
respective Subsidiaries;

     (c) make available to the other party and to any taxing authority as
reasonably requested all information, records, and documents relating to Taxes
of the Companies or any of their respective Subsidiaries;

     (d) provide timely notice to the other party in writing of any pending or
threatened Tax audits or assessments of the Companies or any of their respective
Subsidiaries for taxable periods for which the other may have a liability under
this Article V; and

     (e) furnish the other party with copies of all correspondence received from
any taxing authority in connection with any Tax audit or information request
with respect to any such taxable period.

     Section 5.5 Miscellaneous.

     (a) Any Tax sharing agreement or arrangement to which any of the Companies
or their Subsidiaries are a party (which shall not be construed to include
partnership agreements) shall be terminated as of or prior to the Closing Date
and, after the Closing Date, none of the Companies or any of their Subsidiaries
shall be bound thereby or have any liability thereunder.

     (b) Buyer and Seller agree to consistently treat any transactions involving
the Companies or their respective Subsidiaries that occur on the Closing Date as
properly allocable to Buyer's or Seller's Tax Returns, as the case

                                      -46-
<PAGE>

may be, for all Tax purposes, consistent with this Article V.

     Section 5.6 Section 338(h)(10); Alternative Transaction Structure.

     (a) Election. Subject to Section 6.20, Seller shall timely make a joint
election with Buyer under Section 338(h)(10) of the Code with respect to the
purchase of the Companies and their Subsidiaries (which are taxed as
corporations for United States Federal Income Tax purposes) and under any
similar provisions of state, local or foreign law (the "Section 338(h)(10)
Election"). If the Section 338(h)(10) Election is made, Seller represents that
its sale of the shares of the Companies and such Subsidiaries is eligible for,
and Buyer represents that it is qualified to make, such Section 338(h)(10)
Election.

     (b) Forms. If a Section 338(h)(10) Election is made or an Alternative
Transaction is effected, Seller and Buyer shall within the later of (i) 150 days
after the Closing Date and (ii) 30 days after the determination of the Post-
Closing Adjustment under Section 2.5 (but, in any event, before the time
required to file any required form) exchange completed and executed copies of
Internal Revenue Service Form 8023 (or any other required form), required
schedules thereto, and any similar state, local and foreign forms. If any
changes are required in these forms as a result of information which is first
available after the Closing Date, the parties will promptly agree on such
changes. If the Section 338(h)(10) Election is made or an Alternative
Transaction is effected, Buyer and Seller shall report, in connection with the
determination of income, franchise, or other Taxes measured by net income, the
transactions being undertaken pursuant to this Agreement in a manner consistent
with the Section 338(h)(10) Election or the Alternative Transaction, as the case
may be (unless otherwise required by Law).

     (c) Allocation of Purchase Price. Seller and Buyer will appoint an
appraiser to determine a purchase price and the allocation of that purchase
price among the assets that (i) are deemed to have been acquired pursuant to
Section 338(h)(10) of the Code or any state or foreign law equivalent, or (ii)
are or are deemed to have been acquired in the Alternative Transaction, as the
case may be. Buyer and Seller shall use the asset values determined from such
allocation for purposes of all reports and returns with

                                      -47-
<PAGE>

respect to Taxes, including Internal Revenue Service Form 8594 if applicable, or
any equivalent statement.

     (d) If a Section 338(h)(10) Election is made, or the Alternative
Transaction is effected, Seller shall use its best efforts to ensure that each
entity in which it owns a direct or indirect interest, and which is taxed as a
partnership for United States income tax purposes, will have made an election
under Section 754 of the Code, if such election is not already in effect.

     Section 5.7 Survival of Obligations. The representations and obligations of
the parties set forth in this Article V shall be unconditional and absolute, and
shall survive the Closing until the expiration of the relevant statute of
limitations (including any waivers or extensions thereof) with respect to such
matters and shall expire at such time.

                                  ARTICLE VI

                             Certain Covenants and
                        Agreements of Seller and Buyer

     Section 6.1 Access and Information.

     (a) Prior to Closing, Seller shall permit Buyer and its representatives to
have reasonable access, during regular business hours and upon reasonable
advance notice, to Seller, the Companies and their respective Subsidiaries and
to the officers of Seller, the Companies and their respective Subsidiaries for
the purpose of obtaining information about the Business, to the extent that such
access does not materially interfere with the business of Seller, the Companies
or their Subsidiaries; provided, that Buyer and such representatives comply with
the confidentiality obligations contained herein and in the Confidentiality
Agreement; and provided, further, that the foregoing shall not (i) require
Seller to permit any inspection, or to disclose any information, that in its
reasonable judgment would result in any violation of Law or the disclosure of
any trade secrets of third parties or trade secrets of Parent or Seller
unrelated to the Companies and their respective Subsidiaries and the Business,
or violate any of Seller's, the Companies' or any of their respective
Subsidiaries' obligations with respect to confidentiality if

                                      -48-
<PAGE>

Seller shall have used reasonable best efforts to obtain, but shall not have
been successful in obtaining, the consent of such third party to such inspection
or disclosure or (ii) require any disclosure by Seller, the Companies or any of
their Subsidiaries that could, as a result of such disclosure, have the effect
of causing the waiver of any attorney-client privilege.

     (b) In the event of the termination of this Agreement, Buyer, at its own
expense, shall promptly, and shall use its reasonable best efforts to cause its
agents to, deliver (without retaining any copies thereof) to Seller, or (at
Seller's option) confirm in writing to Seller that they have destroyed, all
information furnished to Buyer or its representatives or agents by Seller, the
Companies or any of their respective Subsidiaries or any of their respective
agents, employees or representatives as a result hereof or in connection
herewith in their possession, whether so obtained before or after the execution
hereof, and all analyses, compilations, forecasts, studies or other documents
prepared by Buyer or its representatives which contain or reflect any such
information. Buyer shall at all times prior to the Closing Date, and in the
event of termination of this Agreement, cause any information so obtained to be
kept confidential and will not use, or permit the use of, such information in
its business or in any other manner or for any other purpose except as
contemplated hereby and except as required by Law.

     (c) In addition to the confidentiality arrangements contained herein, all
information provided or obtained in connection with the transactions
contemplated by this Agreement (including pursuant to clause (a) above and
clause (e) below) shall be held by Buyer in accordance with and subject to the
terms of the Confidentiality Agreement, dated January 15, 1999, between Buyer
Parent and Parent (the "Confidentiality Agreement"); provided, that from and
after the Closing, Buyer and its Affiliates may use such information in
conducting their business, including for purposes of transition. In the event of
a conflict or inconsistency between the terms of this Agreement and the
Confidentiality Agreement, the terms of this Agreement shall govern.

     (d) For a period of two years after the Closing Date Seller agrees to, and
agrees to use reasonable best efforts to cause its agents, representatives and
Affiliates

                                      -49-
<PAGE>

to (i) except as otherwise required by Law, treat and hold as confidential any
information relating to trade secrets, processes, patent and trademark
applications, product development, price, customer and supplier lists, pricing
and marketing plans, policies and strategies, details of client and consultant
contracts, operations methods, product development techniques, business
acquisition plans, new personnel acquisition plans and any other confidential
information relating to the Business, the Companies and each Subsidiary of the
Companies and (ii) not to use any of the confidential information described
above for the purpose of soliciting any customer of or otherwise competing with
the Business. Except as otherwise expressly permitted by this Agreement or
otherwise required by Law, following the termination of the Transition Services
Agreement, Seller agrees to use its reasonable efforts to return to the
Companies or destroy all confidential information referred to above that
exclusively concerns the Business.

     (e) Subject to the provisos set forth in subsection (a) above, prior to the
Closing Seller agrees to keep Buyer reasonably informed, on a current basis,
about significant developments in the business, operations, assets, liabilities
or financial condition of the Companies and their respective Subsidiaries other
than changes affecting the Commercial Mobile Radio Service industry generally
and changes in the general economic condition of the Chicago Market or Central
Illinois Market. Without limiting the generality of the foregoing, but subject
to the provisos set forth in subsection (a) above, Seller shall, and shall cause
Companies and their Subsidiaries to (a) deliver to Buyer on a monthly basis
through the Closing Date financial statements for the Illinois SMSA Limited
Partnership, Chicago SMSA Limited Partnership and Illinois RSA 6 and 7 Limited
Partnership in the format used to prepare the quarterly financial reports for
partners in such partnership.

     (f) During the period beginning on the date hereof and ending on the
Closing Date, Seller shall cause the Companies and their Subsidiaries to provide
notice to Buyer if Seller, the Companies or any of their Subsidiaries receive
written notice from any Governmental Entity alleging the material violation of
any applicable Environmental Law which affects the Business or any of its
properties.

                                      -50-
<PAGE>

     Section 6.2 Conduct of Business. During the period from the date hereof to
the Closing, except (x) as otherwise expressly contemplated by this Agreement,
(y) as set forth on Schedule 6.2, or (z) as Buyer shall otherwise agree in
writing (such agreement not to be unreasonably withheld or delayed), Seller
covenants and agrees that it shall and shall cause the Companies and their
respective Subsidiaries to operate the Business in the ordinary course
consistent with past practice and to use reasonable best efforts to preserve
intact the business and relationships of the Business, the Companies and their
respective Subsidiaries with third parties including distributors, and Seller
shall not (to the extent relating exclusively to the Business) and shall cause
the Companies and their respective Subsidiaries to not:

          (i)   enter into any lease or sublease agreements with an Affiliate
     except with respect to collocation of paging systems in the form provided
     to Buyer by Seller on the date hereof;

          (ii)  sell, lease or otherwise dispose of any capital assets for
     consideration in excess of $500,000 individually or $5,000,000 in the
     aggregate during any twelve month period;

          (iii) except in the ordinary course of business consistent with past
     practice and in an amount not to exceed $1,000,000 in the aggregate, incur
     or assume any indebtedness for borrowed money or guarantee any such
     obligations that is not satisfied prior to Closing;

          (iv)  except as required by Law or any collective bargaining agreement
     or as a result of any change or modification to a Benefit Plan not
     principally related to the Companies or their respective Subsidiaries,
     grant material salary or wage increases, enter into any employment
     contracts, or modify, amend or terminate any Benefit Plan in any manner
     that materially increases the amount of the liability attributable to the
     Companies or their Subsidiaries in respect of such plan;

          (v)   issue, sell, pledge, dispose of or encumber, repurchase or
     redeem any shares of, or securities convertible into or exchangeable or

                                      -51-
<PAGE>

     exercisable for, or options, warrants, calls, commitments or rights of any
     kind to acquire any shares of its capital stock or the capital stock or
     other equity interests of its Subsidiaries;

          (vi)   in any material respect amend their respective certificates of
     incorporation, by-laws, partnership agreements or other similar
     organizational documents, except as required pursuant to the terms thereof;

          (vii)  split, combine or reclassify their respective outstanding
     shares of capital stock;

          (viii) merge or consolidate with any other Person or acquire assets of
     any other Person outside of the ordinary course of business with a fair
     market value in excess of $10,000,000 individually or in the aggregate,
     except for any transaction between the Companies and their Subsidiaries;

          (ix)   make any material loan, advance or capital contributions to or
     investments in any Person except for loans, advances or capital
     contributions to or investments in Subsidiaries or other Persons in which
     the Companies or their Subsidiaries hold equity interests or capital
     contributions required under the organizational documents of the
     Subsidiaries or the other Persons in which the Companies or their
     Subsidiaries hold equity interests;

          (x)    (1) enter into any Contract that, if existing on the date
     hereof, would be required to be listed on Schedule 3.18 or Schedule 3.10(a)
     pursuant to clauses (i), (ii), (vii), (xii) or (xiv) of Section 3.10; or
     (2) other than in the ordinary course of business, terminate, cancel, waive
     or fail to exercise rights to renew or extend (a) any Contract which is
     both material and described in (A) Section 3.18 (Affiliate Agreements), if
     and to the extent such Contract is anticipated, pursuant to this Agreement,
     to be in effect for the benefit of the Companies and/or their Subsidiaries
     following the Closing or (B) clauses (i), (ii), (iv), clause (vi) as it
     relates to leases of cell sites, (vii) and (xi) of Section 3.10 or (b) the
     Contracts listed on Schedule

                                      -52-
<PAGE>

     3.10(a) pursuant to clauses (viii) and (ix) of Section 3.10;

     For purposes of this clause (x), any Contract that, in accordance with
     Section 6.7 or Section 6.14, will on or prior to the Closing Date be
     transferred or assigned, in whole or in part, to the Companies, shall, when
     entered into, waived or modified by Seller or an Affiliate of Seller for or
     on behalf of the Companies, be deemed to have been entered into, waived or
     modified by the Companies;

          (xi)   make any material change in accounting policies or procedures,
     other than actions in the ordinary course of business consistent with past
     practice or except as required by GAAP;

          (xii)  pay, loan or advance any amount to, or sell, transfer or lease
     any properties or assets to, or enter into any agreement or arrangement
     with, any of its officers or directors or, if material, to Affiliates
     outside of the ordinary course of business except for directors' fees or
     compensation to officers;

          (xiii) initiate communications with customers of the Business with
     respect to this transaction except as required by Law or in accordance with
     communications plans developed in consultation with Buyer;

          (xiv)  fail to initiate appropriate steps to renew any Communications
     License that is scheduled to terminate within 30 calendar days after the
     Closing Date unless such failure would not be material;

          (xv)   create any material Encumbrance on any material asset other
     than in the ordinary course of business consistent with past practice;

          (xvi)  make any material Tax election or adopt a method of Tax
     accounting that is inconsistent with elections made or methods used in
     prior periods that would result in a material adverse consequence to Buyer,
     the Companies or their Subsidiaries after the Closing (including without
     limitation any deferral of income or acceleration of Tax benefits); or

                                      -53-
<PAGE>

          (xvii) authorize or enter into an agreement to do any of the
     foregoing.

     Notwithstanding the foregoing in this Section 6.2, to the extent Seller,
the Companies or their Subsidiaries are required to take, or forbear from
taking, any action as a result of (x) conditions imposed on Parent, SBC or any
of their Subsidiaries by any Governmental Entity in connection with the Merger
or (y) fiduciary duties to third parties, and such action or forbearance would
otherwise violate any provision of this Section 6.2, such action or forbearance
shall not be deemed to constitute a breach of Section 6.2 except for purposes of
Article VII. If reasonably practicable, Seller shall provide Buyer with notice
prior to taking or forebearing to take any such action pursuant to the preceding
sentence or, if not practicable, as promptly as reasonably practicable, after
taking or forebearing to take any such action.

     Section 6.3 Registrations, Filings and Consents. (a) Seller and Buyer shall
cooperate with each other and use (and shall cause their respective Subsidiaries
to use) all their respective reasonable best efforts to take or cause to be
taken all actions, and do or cause to be done all things, necessary, proper or
advisable on its part under this Agreement and applicable Laws to consummate and
make effective the transactions contemplated by this Agreement as soon as
reasonably practicable, including preparing and filing as promptly as reasonably
practicable all documentation to effect all necessary applications, notices,
petitions, filings and other documents and to obtain as promptly as reasonably
practicable all consents, registrations, approvals, permits and authorizations
necessary or advisable to be obtained from any third party and/or any
Governmental Entity in order to consummate the transactions contemplated by this
Agreement. Seller and Buyer agree to use their respective best efforts to
provide any information requested by any Governmental Entity pursuant to the
Consent Decree. In addition to the foregoing, Seller and Buyer agree to use
their respective best efforts to file promptly and in any event within 25
Business Days following the date of this Agreement (i) all documentation,
filings and other documents necessary to obtain (x) a Certificate of Convenience
and Necessity and (y) a Certificate of Authority, in each case to enable it to
conduct the operations of the Companies or any of their respective Subsidiaries
from and after the Closing, (ii) the

                                      -54-
<PAGE>

notification and report form, if any, required for the transactions contemplated
by this Agreement and any supplemental information required in connection
therewith pursuant to the HSR Act, and (iii) any required application, report or
other filing or request for approval or notifications with the FCC and any state
regulatory authority from whom consent or clearance is required to be obtained
in connection with the transactions contemplated hereby; provided, that neither
Buyer nor Seller shall be deemed to be in breach of this Agreement if any such
filing is not made within 25 Business Days. Subject to applicable Laws relating
to the exchange of information, Buyer and Seller shall have the right to review
in advance, and to the extent practicable each will consult the other on, all
the information relating to Seller or the Companies or Buyer, as the case may
be, and any of their respective Subsidiaries, that appear in any filing made
with, or written materials submitted to, any third party and/or any Governmental
Entity in connection with the transactions contemplated by this Agreement. In
exercising the foregoing right, each of the Buyer and Seller shall act
reasonably and as promptly as reasonably practicable.

     (b) Buyer and Seller each shall, upon request by the other, furnish the
other with all information concerning itself, its Subsidiaries, directors,
officers and stockholders and such other matters as may be reasonably necessary
or advisable in connection with any statement, filing, notice or application
made by or on behalf of Seller, the Companies, Buyer or any of their respective
Subsidiaries or Affiliates to any third party and/or any Governmental Entity in
connection with the transactions contemplated by this Agreement.

     (c) Buyer and Seller each shall keep the other apprised of the status of
matters relating to completion of the transactions contemplated hereby,
including promptly furnishing the other with copies of notice or other
communications received by Buyer or Seller, as the case may be, the Companies or
any of their respective Subsidiaries, from any third party and/or any
Governmental Entity with respect to the transactions contemplated by this
Agreement (other than the Merger).

     (d) Without limiting the generality of the undertakings pursuant to this
Section 6.3, Seller (in the case of clauses (i) and (iii)) and Buyer (in all
cases set

                                      -55-
<PAGE>

forth below) agree to take or cause to be taken, including by causing its
Affiliates to take, the following actions: (i) provide promptly to any and all
federal, state, local or foreign court or Governmental Entity with jurisdiction
over enforcement of any applicable antitrust laws or telecommunications laws
(each a "Government Regulatory Entity") information and documents requested by
any Government Regulatory Entity or necessary, proper or advisable to permit
consummation of the transactions contemplated by this Agreement; (ii) the
proffer by Buyer of its willingness (w) to sell or otherwise dispose of, or hold
separate and agree to sell or otherwise dispose of, such interests in
overlapping wireless properties as the relevant Government Regulatory Entity may
require or (x) to hold separate its interests in the Companies and their
Subsidiaries pending the sale or other disposition of such interests in such
overlapping wireless properties or another resolution of the pertinent overlaps
satisfactory to the relevant Governmental Entity, and (y) in the case of either
(w) or (x), to accept as conditions to relevant approvals requirements that it
agree in the future to take the steps contemplated by clauses (w) and (x) above
in the event it acquires such interests in such overlapping wireless properties
and, (z) in the case of either (w) or (x), to accept as conditions to relevant
approvals general requirements that it operate the Business in a vigorous,
competitive manner and similar qualitative conditions (including in each case
(w), (x), (y) or (z) above, using reasonable best efforts to enter into
agreements or stipulations with the relevant Government Regulatory Entity
reflecting the foregoing in any such case, no later than 220 days from the date
hereof), if such action(s) shall be reasonably necessary to obtain any consent
required from the relevant Government Regulatory Entity or to prevent or avoid
the commencement of a proceeding to delay, restrain, enjoin or otherwise
prohibit consummation of the transactions contemplated hereby by any Government
Regulatory Entity; and (iii) take promptly, in the event that any permanent or
preliminary injunction or other order is entered or becomes reasonably
foreseeable to be entered in any proceeding that would make consummation of the
transactions contemplated by the terms of this Agreement unlawful or that would
prevent or delay consummation of the transactions contemplated hereby, any and
all steps (including the appeal thereof, the posting of a bond or the taking by
Buyer of the steps contemplated by clause (ii) of this paragraph) necessary to
vacate, modify or suspend such injunction or order so as to permit such
consummation on a

                                      -56-
<PAGE>

schedule as close as possible to that contemplated by this Agreement; provided,
that nothing, set forth in this Section 6.3 shall be deemed to require Seller to
take any action that it concludes in its sole discretion is reasonably likely to
materially reduce the benefits either SBC or Parent expects to realize from the
Merger.

     Section 6.4 Employee Benefit Plans. (a) Buyer agrees that, for a period of
at least 12 months following the Closing Date, it shall, or it shall cause the
Companies and their respective Subsidiaries to, provide the Transferred
Employees with employee compensation and benefit plans, programs and policies
that will provide a level of benefits to employees of the Companies and their
respective Subsidiaries who are employees as of the Closing Date that are
substantially comparable in the aggregate to the Benefit Plans listed on
Schedule 3.14(a) as in effect on the date hereof.

     (b) Effective as of the Closing Date, Buyer shall, or it shall cause the
Companies or their respective Subsidiaries to, establish a plan or program (the
"Mirror Severance Plan") that is substantially identical to the Parent
Management Employees Severance Pay Plan ("Management Severance Plan") in
eligibility to participate, eligibility for benefits and amount of benefits,
provided that benefits under the Mirror Severance Plan may be payable either
from corporate assets or from a qualified plan in the sole discretion of Buyer
in accordance with applicable Law. All Transferred Employees who, as of the
Closing Date, are covered by the Management Severance Plan shall become covered
under the Mirror Severance Plan immediately after the Closing Date and shall
remain covered for a period of at least twenty-four months following the Closing
Date, irrespective of whether any Transferred Employee is thereafter transferred
or otherwise re-assigned by Buyer to another Affiliate of Buyer, the Companies
or their respective Subsidiaries during such twenty-four month period. The
parties hereto agree that employees whose functions are primarily related to the
Business who were hired prior to May 11, 1998 and who are promoted or
transferred from within Seller's controlled group in the ordinary course of
business to positions which would otherwise qualify them to participate in the
Management Severance Plan shall be permitted to be covered under the Management
Severance Plan after the date hereof. For any severance of a Transferred
Employee that occurs during a

                                      -57-
<PAGE>

period of at least twenty-four months following the Closing Date, the Mirror
Severance Plan shall pay severance benefits, if any, to such Transferred
Employee equal to the severance benefits to which such Transferred Employee
would have been entitled under the Management Severance Plan under the same
circumstances, recognizing for this purpose all service and compensation that
would have been recognized by Seller and its Affiliates under the Management
Severance Plan in addition to compensation and service credited through
employment with the Buyer, its Affiliates or the Companies, their respective
Subsidiaries or any successor thereto after the Closing Date. For any Designated
Employee (as defined in Section 6.13 (Employees)) entitled to receive severance
benefits under the Mirror Severance Plan, as determined by Buyer pursuant to a
good faith interpretation of the Mirror Severance Plan, Seller shall reimburse
Buyer for: (i) the difference (if any) between the benefits paid under the
Mirror Severance Plan and the benefits (if any) that would have been payable to
such Designated Employee if covered under Buyer Parent's standard severance pay
plans for comparable employees (such as an ISEP program), in each case after
giving credit for time of service and compensation for employment with Seller
and its Affiliates and Buyer and its Affiliates and (ii) any attorneys' fees and
other litigation expenses incurred with respect to a claim for severance
benefits payable under the terms of the Mirror Severance Plan; it being
understood that for purposes of this clause (ii) such terms regarding attorneys'
fees shall be substantially identical to those of the Management Severance Plan;
provided, however, that Seller shall not be obligated to provide such
reimbursement under clauses (i) and (ii) of this Section 6.4(b) with respect to
an individual Designated Employee in the event that Buyer has not satisfied its
obligations under Section 6.13(a) with respect to such individual Designated
Employee. For purposes of this Section 6.4(b), Buyer and Seller agree that,
under a good faith interpretation of the terms of the Management Severance Plan
(and the Mirror Severance Plan), no severance liabilities shall arise with
respect to the Designated Employees solely as a result of the transaction
contemplated by this Agreement. Seller shall make such reimbursements within 30
days after Buyer sends a reasonably detailed invoice to Seller. Reimbursements
pursuant to the preceding sentence of this Section 6.4(b) shall not be subject
to the Deductible set forth in Section 9.1 (Survival of Representations,
Warranties, Covenants and Agreements; Knowledge of Breach). While the parties
agree that market

                                      -58-
<PAGE>

dynamics and business conditions may change, Buyer hereby confirms its present
intention to operate the Businesses as a going concern and further confirms that
it has no present intention to lay off or otherwise terminate the Transferred
Employees without cause.

     (c) Transferred Employees shall be given credit for all service with the
Companies, their respective Subsidiaries, Parent and Seller and their respective
Affiliates (including any other service credited for purposes of the Benefit
Plans) under all employee benefits plans, programs and policies of Buyer in
which they become participants, to the extent such service was recognized under
Seller's or its Affiliates' comparable benefit plans, solely for purposes of
eligibility, vesting, vacation entitlement and severance benefits. Buyer shall
cover Transferred Employees in a medical, dental and health plan maintained by
Buyer or any of its Subsidiaries effective as of the Closing Date and Buyer
shall cause such plan to (i) waive any preexisting condition limitations for
conditions covered under the applicable medical, health or dental plans of
Parent which cover the Companies and their respective Subsidiaries and (ii)
honor any deductible and out-of-pocket expenses incurred by such employees and
their beneficiaries under the applicable medical, health or dental plans of
Parent which cover the Companies and their respective Subsidiaries during the
portion of such calendar year preceding the Closing Date. If Transferred
Employees become eligible to participate in a group term life insurance plan
maintained by Buyer or any of its Subsidiaries in the year in which the Closing
Date occurs, Buyer shall cause such plan to waive any medical certification for
such employees up to the amount of coverage the employees had under the life
insurance plan of Seller and its Affiliates (but subject to any limits on the
maximum amount of coverage under Buyer's life insurance plan).

     (d) Effective as of the Closing Date, Buyer shall take all actions
necessary to cause the defined contribution plan designated by Buyer (the "Buyer
Savings Plan") to permit each Transferred Employee who is a participant in the
Parent Savings Plan for Salaried Employees or the Parent Savings and Security
Plan for Non-Salaried Employees (collectively, the "Seller Savings Plan") as of
the Closing Date to effect a direct rollover of the taxable portion of such
participant's accrued benefits under the Seller Savings

                                      -59-
<PAGE>

Plan to the Buyer Savings Plan. In connection with any such direct rollover
elected by any such Transferred Employee, Buyer shall allow any such employee's
outstanding loan and related promissory note under the Seller Savings Plan to be
directly rolled-over into the Buyer Savings Plan.

     (e) Buyer agrees that it shall cause bonus payments to be made to the
bonus-eligible Transferred Employees (as determined by Seller) for performance
in the calendar year in which the Closing occurs, based upon (i) for the portion
of the calendar year through the Closing Date, each eligible Transferred
Employee's total target bonus in effect immediately prior to the Closing Date,
adjusted by reference to the financial performance of Parent, Seller and/or
Parent's Affiliates, as the case may be, that would have applied to adjust such
Transferred Employee's target bonus had the Transferred Employee remained
employed by Seller or any of its Affiliates through the payment date prorated
through the Closing (as directed by Seller) and (ii) for the portion of the
calendar year following the Closing Date, the cash incentive payment determined
by Buyer, in its discretion, provided however, that each bonus-eligible
Transferred Employee's total target bonus for the calendar year in which the
Closing occurs shall be no less than was established by Seller. Such payments
shall be made by Buyer as soon as practicable after Buyer is informed by Seller
of the bonus amounts or the rate of payout (e.g., 100% of target, 120% of
target, etc.) being paid by Seller. If the Closing Date occurs in the calendar
year 2000 prior to the date on which the bonus-eligible Transferred Employees'
bonuses based on 1999 performance are paid, Buyer also agrees that it shall
cause bonus payments to be made to each bonus eligible Transferred Employee in
an amount equal to the bonus payment which such Transferred Employee would have
received had such Transferred Employee remained employed with Seller or its
Affiliates on such payment date. Such payments shall be made by Buyer as soon as
practicable after Buyer is informed by Seller of the bonus amounts. Seller
agrees that the Closing Working Capital shall reflect the portion of such bonus
amounts accrued, solely for accounting purposes, and not paid as of the Closing
Date for the Transferred Employees at target (the "Seller's Accrual"). To the
extent that the Seller's Accrual is less than the sum of (i) the actual amounts
payable by Buyer in respect of bonus payments under this Section 6.4(e) with
respect to the calendar year in which the Closing occurs, divided by 365 and
multiplied by the

                                      -60-
<PAGE>

number of days in the calendar year in which the Closing occurs elapsed through
the Closing Date, and (ii) if the Closing occurs in calendar year 2000, the
amount, if any, of any 1999 bonuses not paid prior to Closing, Seller shall
reimburse Buyer for such shortfall. To the extent that the Seller's Accrual
taken into account in determining Closing Working Capital is in excess of the
sum of (i) the actual amount payable by Buyer in respect of bonus payments under
this Section 6.4(e) with respect to the calendar year in which the Closing
occurs, divided by 365 and multiplied by the number of days in the applicable
calendar year in which the Closing occurs elapsed through the Closing Date, and
(ii) if the Closing occurs in calendar year 2000, the amount, if any, of any
1999 bonuses not paid prior to the Closing, Buyer shall reimburse Seller for
such surplus.

     (f) Seller or Parent, as applicable, shall retain sponsorship of the
Benefit Plans following the Closing Date. Following the Closing Date, the
Companies and their respective Subsidiaries shall not be participating employers
in any of the Benefit Plans and shall have no further liabilities with respect
to the Benefit Plans. Except as provided in the financial statements underlying
the Closing Working Capital or Closing Long Term Liabilities, there shall be no
transfer of assets or liabilities with respect to the Benefit Plans. Seller or
Parent shall be responsible for "qualifying events" within the meaning of
Section 603 of ERISA or Section 4980B(f) of the Code that occur on or before the
Closing Date and for any continuation coverage resulting from such qualifying
events.

     Section 6.5 Retention of Books and Records. Buyer shall cause the Companies
and their respective Subsidiaries to retain, until all applicable tax statutes
of limitations (including periods of waiver) have expired, all books, records
and other documents pertaining to the Companies and their respective
Subsidiaries that relate to the period prior to the Closing Date that are
required to be retained under current retention policies of Buyer and to make
the same available after the Closing Date for inspection (at an office of the
Companies or any of their respective Affiliates designated by Seller) and
copying by Seller or its agents at Seller's expense, during regular business
hours and upon reasonable request and upon reasonable advance notice. After the
expiration of such period, no such books and records shall be destroyed by Buyer
if Seller has previously requested in writing (with

                                      -61-
<PAGE>

reasonable detail) that such books and records be preserved. Seller agrees that
such records will be kept strictly confidential and used only for tax or
litigation purposes.

     Section 6.6 Consent Decree. Buyer acknowledges that the conditions to the
consummation of the transactions contemplated by this Agreement may not be
satisfied or waived at the Effective Time (as defined in the Merger Agreement)
and that the Consent Decree effectively requires Parent in connection with the
consummation of the Merger to transfer the Shares to a Person to hold the Shares
following the Effective Time for the primary purpose of disposing of the Shares
(a "Permitted Shares Transferee"). Buyer agrees that Seller may, subject to
Section 10.4, assign title to the Shares to a Permitted Shares Transferee in
accordance with the terms of the Consent Decree. Buyer acknowledges that it has
been provided with a copy of the Consent Decree and agrees to be bound by the
provisions of Section X thereof as if Buyer were a "defendant" therein. Buyer
agrees that, notwithstanding anything else in this Agreement to the contrary, to
the extent Seller, the Companies or their Subsidiaries are required to take or
forbear from taking, any action in connection with the requirements of the
Consent Decree or to avoid acting in violation of the Consent Decree, and such
action or forbearance would otherwise violate this Agreement, such action or
forbearance shall not be deemed to constitute a violation of this Agreement for
any purpose other than Article VII.

     Section 6.7 Company Assets. On or before the Closing Date, as applicable,
either Seller shall, subject (in the case of any Contracts listed thereon) to
Section 6.14, transfer the assets set forth on Part A of Schedule 6.7 to the
Companies or their Subsidiaries or Seller shall cause the Companies or their
Subsidiaries to transfer the assets set forth on Part A of Section 6.7 of the
Seller Disclosure Schedule to Seller or its Affiliates. Buyer and Seller
acknowledge and agree that the transactions described on Part B of Schedule 6.7
shall be consummated substantially in accordance with Schedule 6.7 and by the
times described therein.

     Section 6.8 Intellectual Property. Buyer acknowledges and agrees that
nothing in this Agreement grants or shall be deemed to grant to Buyer, the
Companies or their Affiliates any license to, or transfer of ownership interests
in, any patents, copyrights or trade secrets of

                                      -62-
<PAGE>

Parent or any of its Affiliates other than the Companies and their Subsidiaries.

     Section 6.9 Resignations. Seller shall deliver to Buyer the resignations of
all directors of the Companies and their respective Subsidiaries from their
position as directors of the Companies or their respective Subsidiaries, as the
case may be, at or prior to the Closing Date.

     Section 6.10 Partnership Agreements. Until the Closing, Seller agrees to
cause the Companies and their Subsidiaries to comply with the provisions
contained in the organizational documents of the Persons in which the Companies
and their Subsidiaries (including, in the case of the Companies, the
Subsidiaries of the Companies) have a direct or indirect equity interest
(including any provisions relating to transfer restrictions). Seller agrees that
it will not, without the consent of Buyer, take any action not required by Law
or the terms of the applicable partnership agreement with respect to determining
or agreeing to the price or other terms for the purchase of any partnership
interest in connection with any change of control. Seller and Buyer further
agree that if the transactions contemplated by this Agreement result in any sale
of a partnership interest after the Closing and Seller receives any proceeds in
connection with a partnership interest owned by the Buyer, then Seller shall
deliver any proceeds received in respect of such partnership interest to Buyer
and against delivery of the partnership interest to the person entitled to
receive such partnership interest.

     Section 6.11 Litigation. (a) From and after the Closing, Buyer and its
Subsidiaries, on the one hand, and Seller and its Subsidiaries on the other
shall give to one another and their respective representatives reasonable
access, during normal business hours and upon reasonable advance notice, to
their Subsidiaries, to their officers, directors and employees and their
respective books and records in connection with all matters arising from, in
connection with or relating to any claim, suit, investigation or proceeding
relating to the business of the Companies or their Subsidiaries and for which
the party seeking information or access may (after the Closing) have any
liability (including liability through indemnification).

     (b) From and after the Closing, the Companies and their Subsidiaries will
indemnify and hold Seller and its

                                      -63-
<PAGE>

Affiliates harmless against any damages paid by Seller and its Affiliates to
third parties, or any amounts paid by Seller and its Affiliates to third parties
in settlements, which damages were determined to be owing by a final decision of
a court of competent jurisdiction or which settlement amounts were incurred
pursuant to a settlement approved by Buyer, such approval not to be unreasonably
withheld or delayed, if and to the extent that (i) the litigation out of which
such final decision or settlement arose relates to the Business and only to the
extent such damages or other amounts relate to the Business and (ii) Buyer would
not have been entitled to indemnification hereunder if such damages or amount
paid in settlement had been paid by Buyer, the Companies or their Subsidiaries.

     Section 6.12 Certain Transactions. From the date hereof until the Closing
Date, Buyer shall not and shall cause its Affiliates not to enter into any
agreement, arrangement or transaction which would be reasonably likely to
interfere with promptly obtaining all Governmental Consents to the transactions
contemplated hereby.

     Section 6.13 Employees. (a) Effective as of the Closing Date, Buyer shall
employ, or shall cause the Companies and their respective Subsidiaries to
continue to employ, at the same rate of annual base salary as in effect
immediately prior to the Closing Date, those employees of Seller and its
Affiliates set forth on Schedule 6.13 (each of whose duties and responsibilities
relate exclusively to the Business) and any additional Person who satisfies such
criteria, who is hired or transferred in the ordinary course of business after
the date hereof but prior to the Closing Date (the "Designated Employees"); it
being understood, that (A) such employees (subject to adjustments permitted
under Section 6.13(d)) shall be transferred to the Companies or their respective
Subsidiaries prior to the Closing Date, and (B) Buyer shall not be obligated to
employ any Designated Employee who is on, or has applied for, long-term
disability, who is on lay-off, who is retired or whose employment has been
terminated on or prior to the Closing Date.

     (b) Effective as of the Closing Date, Buyer shall employ, or shall cause
the Companies and their respective Subsidiaries to continue to employ, certain
additional employees (the "Additional Employees"), who shall be designated by
Buyer in accordance with the following

                                      -64-
<PAGE>

process. No later than 20 days following the date hereof, Seller shall provide
Buyer a list of all employees of Seller or its Subsidiaries who are engaged in
supporting the Business (or the comparable business conducted by Seller in the
St. Louis Market) and whose duties and responsibilities relate to, but are not
limited to, the Business (or the comparable business conducted by Seller in the
St. Louis Market) (the "Shared Service Employees") and corresponding
organizational charts covering such employees. Such list will be divided into
job functions and shall include for each Shared Service Employee: (i)
job/position/title, (ii) salary or salary grade level and target bonus, (iii)
supervisor's name and (iv) an estimate of the percentage of the employee's work
duties and responsibilities that relate to the Business or the comparable
business conducted by Seller in the St. Louis Market. Such information will be
kept confidential by Buyer and may be provided separately with respect to the CR
Executives in Seller's sole discretion. During the period commencing on the date
which is 30 days following the date hereof, and ending 35 days thereafter,
Seller shall provide Buyer reasonable access, during reasonable business hours
and upon reasonable notice, to the top two tiers of supervisory personnel (i.e.,
the CR Executives and their direct reports, the "Supervisory Personnel") for
purposes of determining the staffing needs of the Business and identifying the
most appropriate Shared Service Employees for assignment to the Companies and
their respective Subsidiaries, to the extent such access does not materially
interfere with the business of Seller or its Affiliates or the Companies or
their respective Subsidiaries; provided, however, that Buyer may request
Seller's consent, which consent shall not be unreasonably withheld or delayed,
to isolated meetings with the Supervisory Personnel for an additional 15 days as
reasonably necessary. Buyer will notify Seller in writing which Shared Service
Employees will become Additional Employees no later than the date which is 90
days following the date hereof; it being understood that, (A) no more than 40%
of the Shared Service Employees in a function may be designated by Buyer as
Additional Employees, (B) Buyer shall give priority to those Shared Service
Employees who spend more than 50% of their time on services for the Business or
the comparable business conducted by Seller in the St. Louis Market, (C) Buyer
shall not designate more than 500 Shared Service Employees as Additional
Employees and (D) no CR Executives will be Additional Employees. Buyer and
Seller shall conduct the

                                      -65-
<PAGE>

process described in this Section 6.13(b) in accordance with applicable Law. In
addition, Seller and Buyer shall cooperate with each other as necessary to
effectuate the intent of this Section 6.13(b) prior to the Closing Date in the
event that the actual timing of the Closing Date makes the time periods
described above impracticable. Seller agrees to cooperate with Buyer in
providing the information required by this Section 6.13(b) including ensuring
that the Supervisory Personnel are able to provide the information reasonably
necessary for Buyer to make its designations hereunder. Seller shall cause the
Shared Service Employees whom Buyer has designated as Additional Employees to be
transferred to the Companies prior to the Closing Date (subject to adjustments
permitted under Section 6.13(d)). On and after the Closing Date, Buyer shall be
solely responsible for, and indemnify and hold harmless Seller and Parent
against, the severance liabilities arising from post-Closing events, if any,
with respect to the Additional Employees, including attorney's fees and other
litigation expenses incurred with respect to a claim by an Additional Employee
for severance benefits, other than any such severance liabilities arising solely
as a result of the consummation of the transactions contemplated hereby
(assuming that Buyer has adopted the Mirror Severance Plan in accordance with
the terms hereof). For purposes of this Agreement, the Designated Employees and
the Additional Employees shall be referred to collectively as the "Transferred
Employees." With respect to the Shared Service Employees who are CR Executives,
Seller shall provide Buyer with reasonable access to such CR Executives in
accordance with the above-described process, for purposes of determining which
of the CR Executives may be offered employment with Buyer or the Companies, such
employment to be effective following the Closing. Consistent with the above
process, Buyer shall notify Seller regarding any employment arrangement reached
between Buyer and any CR Executives no later than the 90th day following the
date hereof.

     (c) Seller has provided Buyer with the names of the Shared Service
Employees who are executives covered under the Parent Corporate Resource
Severance Pay Plan (the "CR Executives"). In the event that a CR Executive is
offered and accepts employment with Buyer following the Closing Date and notice
of such agreement is provided in accordance with subparagraph (b) above, then
such CR Executive's employment with Seller shall be terminated following the
Effective Time (as defined in the Merger

                                      -66-
<PAGE>

Agreement) and Seller agrees to pay each such CR Executive the total amount of
the cash payment and to provide the other benefits to which such CR Executive is
entitled under the terms of the Parent Corporate Resource Severance Pay Plan
(the "CR Plan").

     (d) Seller shall not take or fail to take any action if such act or failure
to act would be reasonably likely to (i) interfere with Buyer's selection or
employment of the Additional Employees (or the CR Executives) in accordance with
the provisions of Section 6.13(b) and 6.13(c), or (ii) result in a change in the
composition of the Designated Employees outside of the ordinary course of
business; provided, however, that Seller and its Affiliates may not hire any
Designated Employee into a different Affiliate of Seller (including by way of
promotions or transfers) if such action would prevent such Designated Employee
from being a Transferred Employee as of the Closing Date.

     Section 6.14 Contracts. (a) Seller agrees that it shall use its reasonable
best efforts, and cause its Subsidiaries to use their reasonable best efforts,
to (i) have the Contracts listed in Part A of Schedule 6.14 assigned (to the
full extent related to the Business) to either of the Companies or a Subsidiary
of one of the Companies on or prior to the Closing Date and to obtain all
consents required for such assignments or enter into a Contract for the same
goods, property or services provided on terms substantially identical to such
Contracts on behalf of one of the Companies or a Subsidiary of any of the
Companies, as applicable, (ii) have either of the Companies or a Subsidiary of
one of the Companies enter into a Contract substantially similar to those set
forth on Part B of Schedule 6.14 (where applicable, entered into on a basis to
proportionately reflect the benefits (and corresponding obligations) received by
either of the Companies or the applicable Subsidiary as of the time of entry
into such Contract) on or before the Closing Date and (iii) obtain all consents
of third parties to any Contracts of the Companies and their Subsidiaries
required in connection with the consummation of the transactions contemplated by
this Agreement and the Ancillary Agreements. Buyer agrees to use its reasonable
best efforts to assist Seller, the Companies and their Subsidiaries in effecting
the transactions described above. Buyer and Seller acknowledge that in taking
the actions described above, payments to

                                      -67-
<PAGE>

counterparties to certain Contracts may be required. In using their reasonable
best efforts as provided above Buyer and Seller agree that (i) Seller shall be
required to pay the first $5,000,000 of any such amounts paid to third parties
and (ii) any such amounts approved by Buyer in excess of $5,000,000, but not to
exceed an additional $15,000,000, shall be paid 50% by Seller and 50% by Buyer
and for the avoidance of doubt Seller's obligation to pay such amounts shall not
exceed $12,500,000 (twelve million five hundred thousand dollars).

     (b) To the extent the Companies or any of their Subsidiaries are not
parties to any of the Contracts listed on Schedule 6.14 as of the Closing Date
or an alternative arrangement as provided in Section 6.14(a) has not been
established, Seller agrees at the written request of Buyer to use its reasonable
best efforts to provide the Companies and their Subsidiaries the benefits of
such Contracts pursuant to which the Companies and their Subsidiaries were
provided benefits prior to the Closing Date for a period not to exceed the term
of such Contract, subject to clause (d) below.

     (c) To the extent any Contract listed or described in Part C of Schedule
6.14 is not assigned to the Companies or their Subsidiaries, or, where
applicable, a new Contract substantially similar to a Contract set forth on
Schedule 6.14 has not been entered into by the Companies or their Subsidiaries,
on or before the Closing Date, or in either case such Contract is not in full
force and effect without material default thereunder on the Closing Date, Seller
agrees to indemnify and hold harmless Buyer, the Companies and their
Subsidiaries for 50% of any Losses incurred by them as a result thereof. Any
such non-assignment or failure shall not be a breach of this Agreement for
purposes of Article VII hereof and the foregoing indemnification shall be
Buyer's sole remedy for any failure by Seller to obtain any consent to the
assignment of any Contract listed on Schedule 6.14, the assignment of any such
Contract or a replacement for any such Contract in the name of Companies and
their Subsidiaries.

     (d) From and after the Closing Date, Buyer agrees to assume and discharge
all obligations arising out of or under any Contracts (i) assigned to the
Companies or their Subsidiaries in accordance with this Section 6.14, or (ii)

                                      -68-
<PAGE>

under which the Companies and the Subsidiaries receive benefits after the
Closing Date pursuant to Section 6.14(b), but in each case only to the extent
such obligations relate to the Business (with an equitable proportionate
allocation made of any obligations under such Contract to the extent they relate
in part to the Business and in part to other businesses of the Seller or its
Affiliates), and provided that nothing set forth herein is intended to modify,
as between Seller on the one hand, and Buyer and its Subsidiaries on the other
hand, any risk allocation arrangements set forth elsewhere in this agreement
(such as the representations and warranties and indemnities set forth herein)
and for purposes of such representations, warranties, indemnities and other
provisions all Contracts described in clauses (i) and (ii) hereof shall be
deemed to have been assigned to, or in the name of, the Companies and their
Subsidiaries prior to the Closing Date.

     Section 6.15 Transition Services. On the Closing Date, Buyer and Seller
shall enter into the Transition Service Agreement in the form of Exhibit A
hereto.

     Section 6.16 Roaming Agreement. On the Closing Date, Buyer and Seller shall
enter into the Roaming Agreement in the form of Exhibit B hereto.

     Section 6.17 Non-Solicitation. (a) Seller agrees for the eighteen month
period beginning on the Closing Date, it shall not, and shall not permit any of
its Affiliates to, directly or indirectly, (i) enter into any agreements
relating to the wireless telephone service business with any agent/distributor
who distributes products or services of the Business (excluding any reseller of
products and services of the Business) in the Chicago Market or the Central
Illinois Market as of the date hereof or during the period thereafter and prior
to the Closing Date or otherwise interfere or attempt to interfere with any
relationships or arrangements of the Companies and their Subsidiaries relating
to the Business with such agents, (ii) engage in any solicitation targeted at
resellers of products and services of the Business in the Chicago Market or the
Central Illinois Market as of the Closing Date, (iii) except as provided in
Section 6.21 (Employee Customers), engage in any solicitation targeted at
customers of the Business as of the date of this Agreement or during the period
thereafter prior to the Closing Date, or (iv) solicit, hire or employ any
Designated Employees or

                                      -69-
<PAGE>

Additional Employees for employment; provided, however, that this Section 6.17
shall not prevent Seller or any of its Affiliates from (x) engaging in a general
solicitation for customers, or (y) engaging in a solicitation directed at, or
hiring or employing, any Designated Employee or Additional Employee whose
employment has been involuntarily terminated on or after the Closing Date.

     (b) Seller agrees for the eighteen month period beginning on the Closing
Date, it shall not, and shall not permit any of its Affiliates to, directly or
indirectly (i) enter into any Contracts for the provision inside or outside the
Markets of products and services of the type provided by the Business or for the
provision of wireless telephone service (except that SBC may continue to serve
and renew existing Contracts of SBC and its Subsidiaries with such customers)
with any In Market National/Large Accounts or (ii) enter into any Contracts with
other National/Large Accounts providing for the provision within the Markets of
products and services of the type provided by the Business unless such Contracts
have terms and conditions that retain for the Companies and their Subsidiaries
the lines of such customers (either through arrangements with the Companies or
their Subsidiaries or by using a reseller that is not affiliated with Seller of
the service of the Companies or their Subsidiaries). Seller and Buyer agree that
for National/Large Accounts with lines both inside and outside the Markets, and
if the St. Louis Transaction has been completed, in the St. Louis Market, they
shall cooperate to continue to provide service to such customers on the same
terms as in existing Contracts (without giving effect to any renewal or
extension thereof). On or before the Closing Date, Seller shall assign to the
Companies or their Subsidiaries existing Contracts for the provision of products
and services of the Business with National/Large Accounts that have lines only
in the Markets or, if the St. Louis Transaction has been completed, in the St.
Louis Market and all other Contracts which include only customers of the
Business with lines only in the Markets (or, if the St. Louis Transaction has
been completed, only such customers and customers with lines only in the St.
Louis Market).

     (c) Buyer and Seller agree that promptly following the date hereof they
shall organize a transition team, chaired by a representative of Seller and
including equal representation of Buyer and Seller, for the purposes

                                      -70-
<PAGE>

of (i) developing a detailed plan for servicing National/Large Accounts with a
goal of maximizing revenue retention for such accounts, (ii) developing a plan
to handle the accounts of Business Customers (other than National/Large
Accounts) with lines both in the Markets and St. Louis Markets, on the one hand,
and in the remainder of Seller's wireless telephone service business on the
other hand, it being understood that unless otherwise agreed, lines in the
Markets will be assigned to the Companies or their Subsidiary and lines outside
the Markets will be retained by Seller and (iii) coordinating the obtaining of
vendor and other third party contracts and consents.

     (d) Buyer agrees that after the Closing it will cooperate, and cause the
Companies and their Subsidiaries to cooperate, in entering into commercially
reasonable arrangements that will permit Seller and its Affiliates to offer
National/Large Accounts that are not In Market National Large Accounts a package
of services that includes products and services of the type provided by the
Business to the extent necessary to retain lines of customers of the Business as
contemplated by subsection (b)(ii) above.

     Section 6.18 Intercompany Obligations. Buyer acknowledges and Seller agrees
that not later than the day prior to the Closing Date all intercompany
obligations and agreements between the Companies and their Subsidiaries, on the
one hand, and Seller and its other Affiliates, on the other hand, shall be
settled and/or terminated so that at the close of business on the day prior to
the Closing Date no such intercompany obligations shall remain outstanding other
than those intercompany arrangements set forth in the Ancillary Agreements,
those set forth on Schedule 6.14, and intercompany payables incurred in the
ordinary course and taken into account on the Closing Statement or in Closing
Long Term Liabilities.

     Section 6.19 Customer Communications and Billing. Seller agrees that prior
to the Closing Date it shall (A) provide customers of the Business receiving
bundled billing with a notification, in a form approved by Buyer, such approval
not to be unreasonably withheld or delayed, disclosing the possibility of a
transfer of the Business to Buyer and explaining that after the Closing bills
for wireless telephone service charges will be unbundled from bills for wireline
telephone, paging and other services and (B) use reasonable best efforts to take

                                      -71-
<PAGE>

all actions necessary to be able to send customers of the Business unbundled
bills for wireless telephone services not later than 5 business days after the
Closing (subject to normal billing cycles).

     Section 6.20 Alternative Transaction Structure. Seller and Buyer agree that
(a) in lieu of making the Section 338(h)(10) Election, Seller may effect, and
cause the Companies and their Subsidiaries to effect, in whole or in part, one
of the alternative transactions set forth in Schedule 6.20(a) (the "Alternative
Transaction") in order to provide Buyer with a "step-up" in tax basis of the
assets (tangible and intangible) equivalent to the step-up that would have
resulted from the Section 338(h)(10) Election (the "Step Up"), (b) after the
Closing Date, Seller shall indemnify and hold harmless Buyer from and against
any and all Losses arising out of or relating to the implementation of the
Alternative Transaction in lieu of making the Section 338(h)(10) Election (which
for these purposes includes the loss of any Tax benefits that would have
resulted from the Step Up), (c) if the Alternative Transaction is effected, all
representations, warranties, covenants and other agreements and Seller
Disclosure Schedules shall be deemed modified to the extent necessary to
appropriately reflect the Alternative Transaction and the effects thereof, and
(d) if at any time within 90 days after the Closing, Seller determines it is
unable to effectively make the Section 338(h)(10) Election, and cannot or does
not effect the Alternative Transaction, no Section 338(h)(10) Election shall be
made, and the Purchase Price shall be reduced by the aggregate amount of the
"Step-up Tax Loss" incurred by Buyer (as defined below) with respect to the
entity or entities as to which such Step Up is not obtained (such adjustment to
be effected in accordance with Section 2.5(e)) and, if not previously paid
through a purchase price reduction in accordance with Section 2.5(e), Seller
shall pay to Buyer the aggregate amount of the purchase price adjustment under
this Section 6.20 together with interest on such amount at the Applicable Rate
calculated on the basis of a year of 360 days for the actual number of days
elapsed, accrued from the Closing Date up to and including the date of payment.
"Step-up Tax Loss" means with respect to any entity the amount set forth for
such entity on Schedule 6.20(b). Seller shall have the right to amend Schedule
6.20(a) to reflect an alternative structure that provides Buyer with an increase
in Tax benefits attributable to the increase in the Tax basis of such assets
equivalent

                                      -72-
<PAGE>

to the increase in Tax benefits that would have resulted from the Section
338(h)(10) Election, if Buyer consents to such amendment (which consent shall
not be unreasonably withheld or delayed).

     Section 6.21 Employee Customers. Buyer acknowledges and agrees that
notwithstanding any other provision of this Agreement, (a) Parent and each
Affiliate of Parent (other than the Companies and their Subsidiaries), together
with any customer of the Business who is a director or an employee of Seller or
any of its Affiliates or a family member of such director or employee and whose
bills are paid by Parent or any Affiliate of Parent (other than the Companies or
their Subsidiaries) after the Closing will terminate, without penalty, their
purchases of products and services from the Companies and their Subsidiaries and
become customers of the competing business of SBC and (b) any customers of the
Business who are on employee pricing plans of Parent or any Affiliate of Parent
(other than Designated Employees, Additional Employees and CR Executives
ultimately employed by Buyer) may receive targeted solicitations for the
provision of products and services that compete with those offered by the
Companies and their Subsidiaries and Seller or its Affiliates may provide such
Persons with products and services.

     Section 6.22 Year 2000 Testing. Seller agrees that following the date
hereof, Seller shall, and shall cause its Subsidiaries, to use reasonable best
efforts to continue implementing the Y2K Plan in accordance with the terms
thereof and shall provide Buyer with an update on a monthly basis of the
implementation status and testing results.

     Section 6.23 Transition Committees. The parties agree that following the
date hereof, they shall cooperate with each other and shall take such actions as
are reasonably required or requested for the purpose of facilitating the
occurrence of the following mutually agreed actions at or prior to the Closing:
(i) the transfer of the assets listed on Section 6.7 of the Seller Disclosure
Schedules and the verification of such transfers, (ii) the implementation of the
Transition Services Agreement, and (iii) the establishment of arrangements
designed to provide the Companies and their Subsidiaries with the categories of
services and arrangements and the types of assets set forth on Schedule 3.20.

                                      -73-
<PAGE>

     Section 6.24 Prepaid Accounts. As of the Closing, Seller agrees that it
will have terminated those accounts of prepaid customers of the Business to the
extent related to the Business who have not used Seller's prepaid cellular
service within the prior six months.

     Section 6.25 Transition Services Revisions. Between the date hereof and the
Closing Date, the Schedules to the Transition Services Agreement may be revised
in accordance with the terms of the form of Transition Services Agreement.

     Section 6.26 Restriction on Use. Buyer and Seller hereby agree and
acknowledge as follows:

     (a) subject to the restrictions set forth in subparts (b) and (c) of this
Section 6.26 (Restriction on Use), no restriction or limitation shall apply to
Seller's and Seller's Affiliate's use of the trademarks, service marks and logos
listed on Exhibit A to the Trademark License Agreement and the trade dress,
brand names, trade names and domain names associated therewith (collectively,
the "Trademarks") in connection with (i) any use of the Trademarks outside the
Chicago Market or the Central Illinois Market (the "Markets"), (ii) any use of
the Trademarks in the Markets other than in connection with types of business
engaged in by the Business, (iii) any advertising not specifically focused on
the types of business engaged in by the Business, and (iv) any use in
conjunction with the marketing and promotion of services offered as a package by
Seller or its Affiliates (other than services provided by the Business) which
include wireless telephone services offered by SBC and its Affiliates in the
Markets.

     (b) For a period beginning on the Closing Date and lasting until the
expiration of thirty months after the Closing Date (the "Initial Period"),
Seller will not, and will not permit its Affiliates to, use (or license others
to use) the Trademarks in connection with the types of business engaged in by
the Business in the Markets.

     (c) Without limiting the other restrictions set forth in Subpart (b) of
Section 6.26, for a period beginning on the day following the expiration of the
Initial Period and ending eighteen months thereafter (the "Subsequent Period"),
Seller will not, and will not permit its

                                      -74-
<PAGE>

Affiliates to, use (or license others to use) the Trademarks in connection with
the types of business engaged in by the Business in the Markets; provided, that
during the Subsequent Period Seller and its Affiliates may use "Ameritech" as a
modifier of the Cellular One name used by SBC or its Affiliates in the Market.

     (d) After the expiration of the Subsequent Period, Seller and its
Affiliates shall have no limitation or restriction whatsoever on its use of any
of the Trademarks.

     Section 6.27 License. (a) At the Closing, Parent and Buyer shall enter into
the Trademark License Agreement in the form attached hereto as Exhibit C
granting Buyer a non-exclusive, royalty free license to use and authorize others
to use the trademarks, service marks and logos set forth as Exhibit A thereto
(the "Trademarks"), representing all trademarks, service marks and logos used in
the Business and that are the exclusive property of Seller Parent or one of its
Subsidiaries or that Seller Parent or one if its Subsidiaries has rights to
license or sublicense to Buyer, for a term that will end on the later of (i) six
months after the effective time of Buyer Parent's business combination with Bell
Atlantic or the termination of the merger agreement with respect thereto or (ii)
one year from the Closing Date, (but in no event later than December 31, 2000)
(the "Transitional Period") in the Markets solely in connection with the
Business. Parent shall also permit the Buyer to make use of all trade dress as
presently used by Seller or the Companies in the Business and related to the
Trademarks on the same terms and conditions as are applicable to the Trademarks.
It is the intention of Buyer to transition to a new corporate name ("Newco"),
trademarks, service marks, trade dress and logos (the "New Marks"), for itself
as soon as practicable consistent with its overall corporate branding
strategies.

     (b) Nothing in such license agreement shall be construed to allow Buyer or
any of its Affiliates to use in any manner, including, without limitation, in
any corporate communications policy or program, in combination with the
Trademarks either (i) any of Buyer's or its Affiliates existing corporate names,
trademarks, service marks, trade dress or logos ("Existing Marks"), or (ii) any
New Marks; provided that Buyer may use in a manner consistent with the existing
presentation of such Trademark and other trade

                                      -75-
<PAGE>

dress in the Markets "Ameritech Cellular" (and no other Trademarks) in such
combination (the "Permitted Combination") solely to communicate that Buyer or
its Affiliates are changing their corporate name or adopting new marks, in which
event Buyer or its Affiliates may not represent that Newco is the company
formerly known as Ameritech or Ameritech Cellular or any similar formulation;
and, provided further that except as specifically set forth below nothing herein
shall limit any use by Buyer and its Affiliates of Existing Marks or New Marks
in the Markets or elsewhere.

     (c) Unless earlier terminated pursuant to paragraph (a) above, except as
set forth in the last sentence hereof the license granted pursuant to this
Section 6.27, and the License Agreement related hereto, shall terminate on the
date 30 days from the first date on which Buyer or any Affiliate of Buyer uses
or authorizes others to use, and such others do use, any Existing Mark or New
Mark (a) in any Permitted Combination or (b) in connection with the actual
provision of cellular telephone service or products in the Markets. Thereafter,
Buyer shall have a limited right to use, for a period to end as promptly as
reasonably practicable and in no event later than 40 days, the Trademarks to
complete its transition in the Markets to any Existing Mark or New Mark and to
sell off or otherwise utilize existing inventory and remove signage containing
trademarks, but Buyer or any Affiliate of Buyer shall not initiate any new uses
of the Trademarks during such 40-day period.

     (d) In the event of any conflict between this Section 6.27 and the
Trademark License Agreement this Section 6.27 shall control.

     Section 6.28 License for Certain Proprietary Software. To the extent the
proprietary software systems of Seller set forth on Schedule 6.28 hereof are (i)
used to support the Business and (ii) the exclusive property of Seller or Seller
otherwise has rights to sublicense or convey rights to Buyer and its
Subsidiaries, Seller agrees to grant to the Companies and their Subsidiaries at
the Closing a royalty free non-exclusive license to use (subject to customary
restrictions that will not impair Buyer's ability to use such systems in the
wireless telephone business of the Companies and their Subsidiaries in the
Markets) such proprietary software systems during the term

                                      -76-
<PAGE>

of the Transition Services Agreement, but only to the extent such proprietary
software is used to support the wireless telephone business of the Companies and
their Subsidiaries in the Markets, such license to be freely transferrable,
subject to the limitations set forth above, to any successor of Buyer and its
Subsidiaries. At the time such license is granted, no license will be granted to
distribute such proprietary software systems to third parties or to modify or
make derivative works of any proprietary software systems licensed hereunder
other than as required to use such proprietary software systems in the conduct
of the wireless telephone business of the Companies and their Subsidiaries in
the Markets. To the extent any consent from a third party is required to grant a
license or otherwise convey to Buyer and its Subsidiaries a right to use in any
of the systems set forth on Schedule 6.28, such consent will be pursued in
accordance with Section 6.14 and such software license shall be deemed to be
included on Parts B or C of Schedule 6.14 for purposes thereof.

     Section 6.29 Expenditures. From the date hereof until the Closing Date,
Seller shall cause the Companies and their Subsidiaries to make expenditures
consistent in all material respects with the Chicago Expenditures Budget and the
Central Illinois Expenditures Budget, as applicable.

     Section 6.30 Further Assurances. At any time following the Closing Date,
Seller and Buyer shall, and Buyer shall cause the Companies or any of their
respective Subsidiaries to, promptly execute, acknowledge and deliver any other
assurances or documents reasonably requested by Buyer or Seller, as the case may
be, and necessary for Buyer or Seller, as the case may be, to satisfy its
obligations hereunder or obtain the benefits contemplated hereby.

                                  ARTICLE VII

                             Conditions to Closing

     Section 7.1 Conditions to Each Party's Obligation to Effect the
Transaction. The respective obligations of the parties to consummate the
transactions contemplated hereby is subject to the satisfaction or waiver on or
prior to the Closing Date of each of the following conditions:

                                      -77-
<PAGE>

     (a)  (i) The waiting period, if any, applicable to the consummation of the
transactions contemplated hereby under the HSR Act shall have expired or been
earlier terminated and the DOJ, on behalf of the United States of America,
shall have provided written notice under the Consent Decree that it does not
object to the divestiture of the Companies and their Subsidiaries to Buyer, and
(ii)(A) all notices and other filings required to be made prior to Closing by
Seller or Buyer or any of their respective Subsidiaries, with, and all permits,
authorizations, consents and approvals required to be obtained prior to Closing
by, Seller or Buyer or any of their respective Subsidiaries from, any
Governmental Entity (collectively, together with the Cellular Authorizations,
"Governmental Consents") in connection with the execution and delivery of this
Agreement and the consummation of the transactions contemplated hereby the
failure of which to be made or obtained would be reasonably likely to,
individually or in the aggregate, have a Material Adverse Effect or prevent or
materially delay or impair the consummation of the transactions contemplated
hereby and (B) the Cellular Authorizations, in each case shall have been made
or obtained (as the case may be).

     (b)  No court or Governmental Entity of competent jurisdiction shall have
enacted, issued, promulgated, enforced or entered any Law (whether temporary,
preliminary or permanent) that is in effect and enjoins or otherwise prohibits
consummation of the transactions contemplated by this Agreement (an "Order").

     Section 7.2 Conditions to Obligations of Buyer. The obligation of Buyer to
consummate the transactions contemplated by this Agreement is subject to the
satisfaction or waiver by Buyer in writing on or prior to the Closing Date of
each of the following conditions:

          (a)  The representations and warranties of Seller contained herein
     shall be true and correct as of the Closing as if made as of the Closing
     Date, except for such inaccuracies as would not individually or in the
     aggregate be reasonably likely to have a Material Adverse Effect (except
     that representations and warranties that are made as of a specific date or
     as of the date hereof need be true and correct only as of such date), and
     Buyer shall have received a certificate to such effect dated the Closing
     Date and executed by a

                                      -78-
<PAGE>

     duly authorized officer of Seller. For purposes of this Section 7.2, the
     representations and warranties of Seller contained in this Agreement shall
     be deemed to have been made without any qualification as to knowledge or
     materiality and, accordingly, all references in such representations and
     warranties to "material," "Material Adverse Effect," "in all material
     respects," "knowledge," "best knowledge" and similar terms and phrases
     (including dollar thresholds therein) shall be deemed deleted therefrom;

          (b)  SBC shall have provided Buyer with a letter agreement stating
     that SBC agrees to be bound after the Closing by the provisions of Section
     6.17 of this Agreement applicable to Affiliates of Seller;

          (c)  The covenants and agreements of Seller to be performed on or
     prior to the Closing shall have been duly performed in all material
     respects, and Buyer shall have received a certificate to such effect dated
     the Closing Date and executed by a duly authorized officer of Seller;

          (d)  Buyer shall have received an opinion from inside counsel to
     Seller, substantially in the form set forth in Exhibit D-1;

          (e)  Buyer shall have received an opinion from Skadden, Arps, Slate,
     Meagher & Flom LLP, substantially in the form set forth in D-2; and

          (f)  Parent shall have executed and delivered to Buyer the Trademark
     License Agreement, substantially in the form of Exhibit C.

     Section 7.3 Conditions to Obligations of Seller. The obligation of Seller
to consummate the transactions contemplated by this Agreement is subject to the
satisfaction or waiver in writing by Seller on or prior to the Closing Date of
each of the following conditions:

     (a)  The representations and warranties of Buyer contained herein shall
have been true and correct in all material respects as of the Closing, as if
made as of the Closing Date (except that representations and warranties that
are made as of a specific date or as of the date hereof need be true in all
material respects only as of such date),

                                      -79-
<PAGE>

and Seller shall have received a certificate to such effect dated the Closing
Date and executed by a duly authorized officer of Buyer;

     (b)  The covenants and agreements of Buyer to be performed on or prior to
the Closing shall have been duly performed in all material respects, and Seller
shall have received a certificate to such effect dated the Closing Date and
executed by a duly authorized officer of Buyer;

     (c)  The Effective Time (as defined in the Merger Agreement) shall have
occurred;

     (d)  Seller shall have received an opinion from inside counsel to Buyer, in
the form set forth in Exhibit E-1; and

     (e)  If the Closing does not occur immediately after the Effective Time,
then either (i) Parent or SBC shall have received a private letter ruling from
the Internal Revenue Service confirming that the Companies and any of their
Subsidiaries which are taxed as corporations for United States federal income
tax purposes are properly includible in the SBC affiliated group, or (ii) 60
days shall have elapsed since the Effective Time.

                                 ARTICLE VIII

                                  Termination

     Section 8.1 Termination. This Agreement may be terminated at any time
prior to the Closing:

     (a)  by mutual written agreement of Seller and Buyer; or

     (b)  by either Buyer or Seller, by giving written notice of such
termination to the other party, if such other party shall breach any of its
material obligations or agreements under this Agreement and such breach shall
be incapable of cure or has not been cured within 60 days following the giving
of written notice of such breach to the breaching party; or

     (c)  by either Buyer or Seller, by giving written notice of such
termination to the other party, if any Order

                                      -80-
<PAGE>

permanently enjoining or otherwise prohibiting consummation of the transactions
contemplated hereby shall become final and non-appealable; or

     (d)  by either Buyer or Seller, by giving written notice of such
termination to the other, if any condition to such party's obligations
hereunder has not been satisfied or waived and the Closing shall not have
occurred on or prior to March 31, 2000 (the "Termination Date"); provided, that
the terminating party is not in material breach of its obligations under this
Agreement; and; provided, further, that the Termination Date shall be extended
to September 30, 2000 (the "Extended Termination Date") if Seller provides
written notice thereof to Buyer on or prior to March 31, 2000 and on the
Termination Date the transaction under the Merger Agreement shall not have been
consummated; or

     (e)  by Buyer, by giving written notice of such termination to Seller, if
there has been a breach of the representations and warranties of Seller
contained in this Agreement which (x) would result in the failure of the
condition set forth in Section 7.2(a) (Conditions to Obligations of Buyer) and
(y) cannot be or is not cured prior to the Termination Date, or, if extended,
the Extended Termination Date; or

     (f)  by Seller, by giving written notice of such termination to Buyer, if
there has been a breach of the representations and warranties of Buyer
contained in this Agreement which (x) would result in the failure of the
condition set forth in Section 7.3(a) (Conditions to Obligations of Seller) and
(y) cannot be or is not cured prior to the Termination Date, or, if extended,
the Extended Termination Date; or

     (g)  by Seller, by giving written notice of such termination to Buyer, if
the Merger Agreement shall have been terminated.

                                      -81-
<PAGE>

     Section 8.2 Effect of Termination. In the event of the termination of this
Agreement in accordance with Section 8.1 (Termination) hereof, this Agreement
shall thereafter become void and have no effect, and no party hereto or its
respective Affiliates or their directors, officers, employees or agents shall
have any liability to the other party hereto or their respective Affiliates,
directors, officers or employees, except for the obligations of the parties
hereto contained in this Section 8.2 and in Sections 10.2 (Expenses), 10.3
(Public Disclosure), 10.11 (Notices), 10.12 (Governing Law) and 10.13 (Waiver
of Jury Trial) hereof, and except that nothing herein will relieve any party
from liability for any breach of this Agreement prior to such termination.

                                  ARTICLE IX

                         Survival And Indemnification

     Section 9.1 Survival of Representations, Warranties, Covenants and
Agreements. The representations and warranties included or provided for (x) in
Sections 3.5 through 3.11, and Sections 3.16 (except for the last sentence of
Section 3.16 (Property and Leases) referred to in (bb) below) through Section
3.20, Section 4.2 and Sections 4.4, 4.6 and 4.8 herein shall survive the
Closing until the 120th day following the end of the first full calendar year
after the Closing, (y) in Section 3.12 (Tax Matters) herein shall survive the
Closing until the expiration of the applicable statute of limitations
(including any waivers or extensions thereof) with respect to such matters and
shall expire at such time,(z) in Sections 3.13 (Labor Matters), 3.14 (Employee
Benefits) and 3.15 (Environmental Matters) shall survive the Closing until the
fourth anniversary of the Closing Date and shall expire at such time, (aa) in
Sections 3.1 (Organization and Authority of Seller), 3.2 (Organization and
Qualification of the Companies), 3.3 (Capitalization of the Companies), 3.4
(Subsidiaries of the Companies), 3.21 (Brokers and Finders), 3.22 (No Other
Representations and Warranties), 4.1 (Organization and Authority of Buyer), 4.3
(Brokers and Finders), 4.5 (Securities Act), 4.7 (Investigation by Buyer) and
4.9 (No Other Representations and Warranties) shall have no expiration date and
(bb) in the last sentence of Section 3.16 (Property and Leases) shall survive
the Closing until the 180th day following the Closing. In the event that any

                                      -82-
<PAGE>

Claim Notice or any other written notice of a claim shall be given hereunder
within the applicable survival period, the representations and warranties that
are the subject of such indemnity claim shall survive until such claim is
finally resolved. The covenants and other agreements contained in this
Agreement shall survive the Closing until the date or dates specified therein
or the expiration of the applicable statute of limitations (including any
waivers or extensions thereof) with respect to such matters, whichever is
later. Except with respect to the representations and warranties contained in
Sections 3.21 (Brokers and Finders), 3.3 (Capitalization of the Companies), 3.4
(Subsidiaries of the Companies; Minority Interests), 3.5(e) (Financial
Statements - Metrocom), 3.12 (Tax Matters) and 3.20 (Ability to Conduct
Business), in no event shall Seller be liable to Buyer for any breach of the
representations or warranties included or provided for herein or in any other
document delivered pursuant to this Agreement, unless and until all claims for
which Losses are recoverable by Buyer exceed $25,500,000 (twenty five million
five hundred thousand dollars) (the "Deductible") and Seller shall be liable
only for the amount by which all such recoverable Losses exceed the Deductible.
In addition, (x) except for breaches of (1) Sections 3.3 (Capitalization of the
Companies), 3.4 (Subsidiaries of the Companies), 3.5(e) (Financial Statements -
Metrocom), and 3.21 (Brokers and Finders), (2) breaches of covenants and
indemnities outside this Article IX and (3) the special indemnity under clauses
9.3(a)(ii), 9.3(a)(iii), 9.3(a)(iv) and 9.3(a)(v) for which there shall be no
limit, any payments under this Article IX by Seller to Buyer for Losses shall
not exceed in the aggregate $637,500,000 (six hundred thirty seven million five
hundred thousand dollars) (the "Limit").

     Section 9.2 Indemnification by Buyer. (a) For the period commencing on the
Closing Date and ending, as the case may be, upon the expiration of the periods
specified in Section 9.1 (Survival of Representations, Warranties, Covenants
and Agreements) hereof (if applicable), Buyer shall indemnify, defend and hold
harmless Seller and its Affiliates, and their respective directors, officers,
employees, shareholders and agents ("Seller Indemnified Parties") against and
in respect of all losses, damages (excluding punitive and consequential
damages, other than those claimed by third parties and actual non-speculative
lost profits of the Companies and their Subsidiaries), liabilities, costs and
expenses (including reasonable

                                      -83-
<PAGE>

attorneys' fees and expenses incurred in investigating, preparing or defending
any claims covered hereby) (collectively, "Losses") sustained or incurred
arising out of, in connection with or relating to any breaches of Buyer's
representations and warranties set forth in this Agreement (other than
representations and warranties set forth in Article V, as to which the
indemnification provisions set forth in Article V shall govern).

     (b)  Any payments pursuant to this Section 9.2 or Article V shall be
treated as an adjustment to the Purchase Price.

     Section 9.3 Indemnification by Seller. (a) For the period commencing on
the Closing Date and ending, as the case may be, upon the expiration of the
periods specified in Section 9.1 (Survival of Representations, Warranties,
Covenants and Agreements) hereof (if applicable), Seller shall, subject to the
limitations set forth in Section 9.1 (Survival of Representations, Warranties,
Covenants and Agreements) hereof, indemnify, defend and hold harmless Buyer and
its respective directors, officers, employees, shareholders and agents ("Buyer
Indemnified Parties" and, collectively with the Seller Indemnified Parties, the
"Indemnified Parties") against and in respect of (i) all Losses sustained,
incurred, arising out of, in connection with or relating to any breaches of
Seller's representations and warranties set forth in this Agreement (other than
representations and warranties set forth in Article V (Tax Matters), as to
which the indemnification provisions set forth in Article V (Tax Matters) shall
govern), (ii) Losses arising out of or relating to the matters set forth on
Schedule 9.3 to the extent set forth thereon (iii) all Losses incurred in
connection with litigation that was omitted from the Schedules hereto in breach
of the representations set forth in Section 3.8 hereof, (iv) all Losses to the
extent relating to any assets, properties or businesses of the Companies and
their Subsidiaries transferred or to be transferred to Seller or any of its
Affiliates (other than the Companies and their Subsidiaries), in connection
with the transactions contemplated hereby on or prior to the Closing Date, and
(v) all Losses arising out of or relating to the 401(k) plan formerly
maintained by Triangle Stereo, Inc., the termination thereof or the
distribution of assets therefrom.

                                      -84-
<PAGE>

     (b)  In addition to the foregoing, and without regard to and without being
counted in calculating the Deductible, but to be included in determining if the
Limit has been reached, from and after the Closing Date Seller shall indemnify,
defend and hold harmless the Buyer Indemnified Parties against and in respect
of fifty percent (50%) of all Losses in excess of $5 million per Qualifying
Customer Litigation (as defined below). A "Qualifying Customer Litigation" is a
case or group of consolidated cases with substantially identical claims brought
by customers of both the Business and customers of similar businesses of Seller
to the extent relating to the conduct of the Business prior to the Closing Date
and filed with a Court after the date hereof and prior to the third anniversary
of the Closing Date. For purposes of this Section 9.3(b), any case filed
against Seller or its Affiliates before the date hereof which does not
currently name or involve the Companies or their Subsidiaries or the Business,
but subsequent to the date hereof is modified so that it does name or involve
the Companies or their Subsidiaries or the Business, shall be deemed to have
been filed after the date hereof. Except as specifically provided in this
Agreement, Seller shall have no liability to Buyer with respect to any Losses
to the extent relating or arising out of the conduct of the Business on or
after the Closing Date.

     (c)  No indemnity shall be recoverable by the Buyer Indemnified Parties
with respect to any matter to the extent such matter was reflected in the final
calculation of the adjustment to the Purchase Price, if any, pursuant to
Article II and any Losses related thereto to the extent reflected in the final
calculation of the adjustment to the Purchase Price shall not be counted in
determining if the Deductible has been satisfied.

     (d)  Any payments pursuant to this Section 9.3 or Article V (Tax Matters)
shall be treated as an adjustment to the Purchase Price.

     Section 9.4 Indemnification as Sole Remedy. Following the Closing, the
indemnities provided in Article V (Tax Matters), this Article IX and Article VI
shall be the sole and exclusive remedy of the parties hereto, their Affiliates,
successors and assigns with respect to any and all claims for Losses sustained
or incurred arising out of, in connection with or relating to this Agreement
and the

                                      -85-
<PAGE>

transactions contemplated by this Agreement, except for damages for breach of
any covenants or agreements set forth in this Agreement or any of the other
agreements contemplated hereby or for the right of the parties hereto to seek
specific performance of the obligations set forth herein.

     Section 9.5 Method of Asserting Claims, Etc. (a) Except as provided in
Article V with respect to matters related to Taxes and as set forth in
paragraph (b) below, all claims for indemnification by the Indemnified Party
hereunder with respect to third-party claims shall be asserted and resolved as
set forth in this Section 9.5(a). In the event that any written claim or demand
for which Seller or Buyer, as the case may be (in such capacity, an
"Indemnifying Party"), may be liable to any Indemnified Party hereunder is
asserted against or sought to be collected from any Indemnified Party by a
third party, such Indemnified Party shall promptly, but in no event later than
15 days following such Indemnified Party's receipt of such claim or demand,
notify in writing the Indemnifying Party of such claim or demand and the amount
or the estimated amount thereof to the extent then feasible (which estimate
shall not be conclusive of the final amount of such claim or demand) (the
"Claim Notice"). The Indemnifying Party shall (i) have no liability with
respect to any expenses incurred by the Indemnified Party with respect to the
relevant third-party claims prior to the time the Claim Notice is delivered to
the Indemnifying Party and such expenses shall be deemed not to be Losses of
the Indemnified Party and (ii) be relieved of its obligations to indemnify the
Indemnified Party with respect to such claim or demand if the Indemnified Party
fails to timely deliver the Claim Notice, but only to the extent the
Indemnifying Party is prejudiced thereby. The Indemnifying Party shall have 30
days from the personal delivery or mailing of the Claim Notice, whichever is
later, (the "Notice Period") to notify the Indemnified Party whether or not it
desires to defend the Indemnified Party against such claim or demand and shall
during the Notice Period and thereafter be provided by the Indemnified Party
with such information relating to the claim or demand as the Indemnifying Party
shall request. All costs and expenses incurred by the Indemnifying Party in
defending such claim or demand shall be borne by the Indemnifying Party. Except
as hereinafter provided, in the event that the Indemnifying Party notifies the
Indemnified Party within the Notice Period that it desires to defend the
Indemnified

                                      -86-
<PAGE>

Party against such claim or demand, the Indemnifying Party shall have the sole
power to direct and control such defense. If the Indemnifying Party so elects
to assume the defense of such claim, the Indemnifying Party shall not be liable
to the Indemnified Party for any legal expenses subsequently incurred by the
Indemnified Party. If any Indemnified Party desires to participate in, but not
control, any such defense, it may do so at its sole cost and expense, provided,
that in any action seeking an injunction or decree which would restrict the
future activity or conduct of the Indemnified Party or any Subsidiary or
Affiliate thereof, the Indemnified Party shall be entitled to participate in
the defense of such action at the expense of the Indemnifying Party. The
Indemnified Party shall not settle, compromise or discharge a claim or demand
for which it is indemnified by the Indemnifying Party or admit to any liability
with respect to such claim or demand without the prior written consent of the
Indemnifying Party (which consent shall not be unreasonably withheld). The
Indemnifying Party shall not, without the written consent of the Indemnified
Party (which consent shall not be unreasonably withheld), settle, compromise or
offer to settle or compromise any such claim or demand on a basis which would
result in the imposition of a consent order, injunction or decree which would
restrict the future activity or conduct of the Indemnified Party or any
Subsidiary or Affiliate thereof. To the extent the Indemnifying Party shall
direct, control or participate in the defense or settlement of any third party
claim or demand, the Indemnified Party will provide the Indemnifying Party and
its counsel access to all relevant business records and other documents, and
shall use its reasonable best efforts to assist, and to cause the employees and
counsel of the Indemnified Party to assist, in defense of such claim. If the
Indemnifying Party elects not to defend the Indemnified Party, the Indemnified
Party shall have the right to defend the claim or demand by appropriate
proceedings and shall have the sole power to direct and control such defense.
In any event, the Indemnifying Party shall have the right to participate in the
defense or settlement of any third party claim or demand for which the
Indemnifying Party may be liable hereunder at its own expense.

     (b)  All claims for indemnification by Seller or Buyer with respect to
litigation for which the party seeking indemnification is indemnified solely
pursuant to one or more of Sections 6.11(b), 9.3(a)(ii) or 9.3(b), and the

                                      -87-
<PAGE>

defense of the relevant litigation, shall be handled as contemplated in this
Section 9.5(b). Upon receipt of a summons and complaint or other notice (which
is also filed with a Court) of any such litigation from which it may be
reasonably inferred that the other party may be entitled to or required to be
provided indemnification hereunder, the receiving party shall promptly notify
the other.

          (i)    If and for so long as the particular litigation is of the type
     described in Section 9.3(a)(ii) or 9.3(b) (without reference to the three
     year limitation set forth therein) or of a type described under Section
     6.11(b) in which the parties otherwise each have financial exposure not
     fully covered by indemnification from the other party (without regard to
     caps and deductibles), Buyer and Seller shall each retain their own
     counsel and participate in the defense thereof and shall cooperate with
     one another in the course thereof. In any such litigation, neither party
     shall enter into a settlement adversely affecting the liability of the
     other without the consent of the other, which consent shall not be
     unreasonably withheld or delayed.

          (ii)   If and for so long as the particular litigation is one in which
     only one party has a financial exposure not covered by indemnification
     from the other party, then the party having such exposure shall defend and
     control the defense of such litigation. With respect to the particular
     cases set forth on Schedule 3.8 that relate exclusively to the Business
     (that are not also set forth on Schedule 9(a)(ii)) (the "Schedule 3.8
     Cases"), on the Closing Date Buyer agrees to assume, and Seller agrees to
     transfer to Buyer, the defense thereof in accordance with this clause
     (ii), and Buyer shall control such cases, provided, that, Buyer agrees to
     continue to utilize the same outside counsel as are presently responsible
     for such cases unless it reasonably determines such continuing
     representation is inadvisable. Buyer agrees that any counsel selected to
     defend the Schedule 3.8 cases controlled by Buyer shall be reasonably
     acceptable to Seller.

          (iii)  In all cases the parties shall cooperate with each other by
     providing access to relevant

                                      -88-
<PAGE>

     employees and business records and otherwise as contemplated by Section
     9.5(a).

     (c) In determining the amount of Losses sustained or incurred by Buyer for
purposes of the indemnification under Section 9.3(a)(ii) or 9.3(b), Promotional
Items constituting a portion of a Loss shall be deemed to be a Loss only to the
extent of the actual cost to Buyer or its Affiliates of providing any such
Promotional Item and such Losses shall be offset by any actual profits realized
in providing such Promotional Items. For such purposes, the actual cost shall
be deemed to be the actual cost of providing the good or service constituting
the Promotional Item on a fully allocated basis to the Companies and their
Subsidiaries and shall not be deemed to include any lost profit or markup which
might be obtained if such service or product was sold to a customer of the
Companies or their Subsidiaries. For purposes of this Section 9.5(c),
"Promotional Items" shall be deemed to include all non-monetary items provided
in settlement of any claim or as the result of an adjudication of any
litigation and shall be deemed to include services such as certificates for
free minutes of use, discounts on minutes of use, discounts on handsets,
discounts on other products sold by Buyer or its Affiliates and other products,
goods, services or rights to obtain any products, goods or services.

     Section 9.6 Calculation of Losses. The amount of any Losses payable by the
Indemnifying Party to the Indemnified Party shall take into account any (i)
amounts recovered or recoverable by the Indemnified Party under applicable
insurance policies (with third party carriers), (ii) Tax cost incurred by the
Indemnified Party arising from the receipt of indemnity payments and (iii) Tax
benefit actually realized by the Indemnified Party arising from the incurrence
or payment of any such Loss.

     Section 9.7 Assignment of Claims. If the Indemnified Party receives any
payment from an Indemnifying Party in respect of any Losses and the Indemnified
Party could have recovered all or a part of such Losses from a third party (a
"Potential Contributor") based on the underlying claim or demand asserted
against the Indemnifying Party, the Indemnified Party shall, to the extent
permitted by Law or any applicable contractual arrangement, assign such of its
rights to proceed against the Potential Contributor as are necessary to permit
the Indemnifying

                                      -89-
<PAGE>

Party to recover from the Potential Contributor the amount of such payment.

     Section 9.8 Overlapping Provisions. Except as provided in the last
sentence of Section 3.15, in the parenthetical at the end of clause (i) in the
last sentence of Section 9.3(a) or in the last sentence of Section 6.14(c),
where (i) more than one representation in this Agreement is breached or
otherwise rendered inaccurate or incomplete by virtue of an event or
occurrence; (ii) more than one covenant or other provision hereunder is
breached or violated by a party's action or failure to act; or (iii) more than
one indemnification provision herein is by its terms applicable to any
litigation, event, occurrence, action, failure to act or other breach, the
party seeking indemnification or another remedy hereunder shall be entitled to
proceed under any applicable provision hereunder, and to obtain any
indemnification or remedy available thereunder, regardless of whether the
indemnification or remedy available thereunder would not have been available,
or would have been available to a lesser extent or in a lesser amount, under
another provision relating thereto. No party shall be entitled under this
Section 9.8 or any other provision of this Agreement to obtain duplicative
indemnification or remedies.

                                    ARTICLE X

                                  Miscellaneous

     Section 10.1 Amendment and Waiver. Any provision of this Agreement may be
amended or waived if, and only if, such amendment or waiver is in writing and
signed, in the case of an amendment, by Seller and Buyer, or in the case of a
waiver, by the party against whom the waiver is to be effective. No failure or
delay by any party in exercising any right, power or privilege hereunder shall
operate as a waiver thereof nor shall any single or partial exercise thereof
preclude any other or further exercise thereof or the exercise of any other
right, power or privilege.

     Section 10.2 Expenses. Except as otherwise expressly provided in this
Agreement, whether or not the transactions contemplated by this Agreement are
consummated, the parties shall bear their own respective expenses (including,
but not limited to, all compensation and

                                     -90-
<PAGE>

expenses of counsel, financial advisors, consultants, actuaries and
independent accountants) incurred in connection with this Agreement and the
transactions contemplated hereby.

     Section 10.3 Public Disclosure. The parties to this Agreement hereby agree
with the other party hereto that, except as may be required to comply with the
requirements of applicable Law or the rules and regulations of any national
securities exchange upon which the securities of one of the parties or its
Affiliates is listed, no press release or similar public announcement or
communication will be made or caused to be made concerning the execution or
performance of this Agreement unless specifically approved in advance by all
parties hereto; provided, however, that to the extent that either party to this
Agreement is required by Law or the rules and regulations of any stock exchange
upon which the securities of one or more of the parties or its Affiliates is
listed to make such a public disclosure, such public disclosure shall only be
made after prior consultation with the other party to this Agreement, if
consultation is reasonably practicable.

     Section 10.4 Assignment. No party to this Agreement may assign any of its
rights or obligations under this Agreement without the prior written consent of
the other party hereto; provided, that Seller shall be entitled to assign its
obligations under this agreement to any Permitted Share Transferee so long as
such Permitted Share Transferee agrees to be bound by all of the terms and
conditions of this Agreement (and shall thereafter be "Seller" for all purposes
of this Agreement) and Seller agrees to remain liable as guarantor of the
Permitted Share Transferee, and Buyer may assign any of its rights hereunder to
any Affiliate so long as (i) Buyer remains obligated to perform or agrees to
unconditionally guarantee performance of any obligations of Buyer hereunder
through the Closing Date and (ii) such assignment does not delay receipt of any
Governmental Consents or third party consents that are a condition to
completion of the transactions contemplated by this Agreement.

     Section 10.5 Entire Agreement. This Agreement, the Ancillary Agreements,
the Trademark License Agreement and the stock purchase agreement of even date
herewith relating to the St. Louis Transaction (including all Annexes and
Schedules hereto) contains the entire agreement between

                                     -91-
<PAGE>

the parties hereto with respect to the subject matter hereof and supersedes all
prior agreements and understandings, oral or written, with respect to such
matters, except for the Confidentiality Agreement, which will remain in full
force and effect for the term provided for therein.

     Section 10.6 Fulfillment of Obligations. Any obligation of any party to
any other party under this Agreement, which obligation is performed, satisfied
or fulfilled by an Affiliate of such party, shall be deemed to have been
performed, satisfied or fulfilled by such party.

     Section 10.7 Parties in Interest; No Third Party Beneficiaries. This
Agreement shall inure to the benefit of and be binding upon the parties hereto
and their respective successors and permitted assigns. Nothing in this
Agreement, express or implied, is intended to confer upon any Person other than
Buyer, Seller or their successors any rights or remedies under or by reason of
this Agreement.

     Section 10.8 Guarantee. Buyer Parent hereby unconditionally guarantees
performance of Buyer's obligations hereunder and payment of damages or
liabilities which Buyer may be obligated to pay in connection with a breach of
this Agreement on or prior to the Closing Date.

     Section 10.9 Counterparts. This Agreement and any amendments hereto may be
executed in one or more counterparts, each of which shall be deemed to be an
original by the parties executing such counterpart, but all of which shall be
considered one and the same instrument.

     Section 10.10 Section Headings. The section and paragraph headings and
table of contents contained in this Agreement are for reference purposes only
and shall not in any way affect the meaning or interpretation of this
Agreement.

     Section 10.11 Notices. All notices or other communications hereunder shall
be deemed to have been duly given and made if in writing and if served by
personal delivery upon the party for whom it is intended, if delivered by
registered or certified mail, return receipt requested, or by a national
courier service, or if sent by facsimile; provided that the facsimile is
promptly confirmed by written confirmation by registered mail thereof, to the
person at the address set forth below, or such other address

                                     -92-
<PAGE>

as may be designated in writing hereafter, in the same manner, by such person:

                  (a)      if to Seller, to:

                           Ameritech Mobile Communications, Inc.
                           c/o Ameritech Corporation
                           30 South Wacker Drive
                           Chicago, Illinois 60606
                           facsimile: (312) 609-6307

                           Attention: Assistant General
                                         Counsel - Transactions

                  With a copy to:

                           Sullivan & Cromwell
                           125 Broad Street
                           New York, New York 10004
                           facsimile: (212) 558-3588

                           Attention: Joseph B. Frumkin

                  and to:

                           Skadden, Arps, Slate, Meagher & Flom
                           (Illinois)
                           333 West Wacker Drive
                           Chicago, Illinois 60606
                           facsimile: (312) 407-0411

                           Attention: Charles Mulaney

                                     -93-
<PAGE>

                  (b)      if to Buyer, to:

                           GTE Consumer Services Incorporated
                           1255 Corporate Drive
                           Irving, Texas 75038-2518
                           facsimile: (972) 507-2322

                           Attention: James A. Attwood

                  With a copy to:

                           O'Melveny & Myers LLP
                           153 East 53rd Street
                           New York, New York 10022
                           facsimile: (212) 326-2061

                           Attention: Jeffrey J. Rosen

                  (c)      if to Buyer Parent:

                           GTE Corporation
                           1255 Corporate Drive
                           Irving, Texas 75038-2518
                           facsimile: (972) 507-2322

                           Attention: James A. Attwood

                  With a copy to:

                           O'Melveny & Myers LLP
                           153 East 53rd Street
                           New York, New York 10022
                           facsimile: (212) 326-2061

                           Attention: Jeffrey J. Rosen

Any notice given by mail shall be effective when received.

     SECTION 10.12 GOVERNING LAW; SUBMISSION TO JURISDICTION; SELECTION OF
FORUM. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH,
THE LAWS OF THE STATE OF NEW YORK WITHOUT REFERENCE TO THE CHOICE OF LAW
PRINCIPLES THEREOF. EACH PARTY HERETO AGREES THAT IT SHALL BRING ANY ACTION OR
PROCEEDING IN RESPECT OF ANY CLAIM ARISING OUT OF OR RELATED TO THIS AGREEMENT
OR THE TRANSACTIONS CONTAINED IN OR CONTEMPLATED BY THIS AGREEMENT, WHETHER IN
TORT OR CONTRACT OR AT LAW OR IN EQUITY,

                                      -94-
<PAGE>

EXCLUSIVELY IN THE UNITED STATES DISTRICT COURT FOR THE SOUTHERN DISTRICT OF
NEW YORK OR THE SUPREME COURT OF THE STATE OF NEW YORK FOR THE COUNTY OF NEW
YORK (THE "CHOSEN COURTS") AND (I) IRREVOCABLY SUBMITS TO THE EXCLUSIVE
JURISDICTION OF THE CHOSEN COURTS, (II) WAIVES ANY OBJECTION TO LAYING VENUE IN
ANY SUCH ACTION OR PROCEEDING IN THE CHOSEN COURTS, (III) WAIVES ANY OBJECTION
THAT THE CHOSEN COURTS ARE AN INCONVENIENT FORUM OR DO NOT HAVE JURISDICTION
OVER ANY PARTY HERETO AND (IV) AGREES THAT SERVICE OF PROCESS UPON SUCH PARTY
IN ANY SUCH ACTION OR PROCEEDING SHALL BE EFFECTIVE IF NOTICE IS GIVEN IN
ACCORDANCE WITH SECTION 10.11 OF THIS AGREEMENT.

     SECTION 10.13 WAIVER OF JURY TRIAL. THE PARTIES HERETO HEREBY IRREVOCABLY
WAIVE ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF
OR RELATED TO THE AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY.

     Section 10.14 Severability. The provisions of this Agreement shall be
deemed severable and the invalidity or unenforceability of any provision shall
not affect the validity or enforceability of the other provisions hereof unless
such invalidity or unenforceability, after taking into account the mitigation
contemplated by the next sentence, deprives a party of a material benefit
contemplated by this Agreement. If any provision of this Agreement, or the
application thereof to any Person or any circumstance, is invalid or
unenforceable, (a) a suitable and equitable provision shall be substituted
therefor in order to carry out, so far as may be valid and enforceable, the
intent and purpose of such invalid or unenforceable provision and (b) the
remainder of this Agreement and the application of such provision to other
persons, entities or circumstances shall not be affected by such invalidity or
unenforceability, nor shall such invalidity or unenforceability affect the
validity or enforceability of such provision, or the application thereof, in
any other jurisdiction.

                                     -95-
<PAGE>

     IN WITNESS WHEREOF, this Agreement has been signed on behalf of each of
the parties hereto as of the date first written above.

                      AMERITECH MOBILE
                      COMMUNICATIONS, INC.

                      By: /s/ Richard C. Notebaert
                          -----------------------------------
                          Name:  Richard C. Notebaert
                          Title: Chairman of the Board,
                                 President and CEO of Ameritech Corporation
                                 the Sole Shareholder of
                                 Ameritech Mobile Communications, Inc.

                      GTE CONSUMER SERVICES INCORPORATED

                      By: /s/ James Attwood
                          -----------------------------------
                          Name: James Attwood
                          Title:

                      Solely as to Section 10.8
                      (Guarantee)

                      GTE CORPORATION

                      By: /s/ Charles R. Lee
                          -----------------------------------
                          Name: Charles R. Lee
                          Title:

                                           -96-

<PAGE>

                                                                       Exhibit F

     "EBITDA Subscriber Amount" shall mean, in the event that there shall exist

          (a)  an Excess EBITDA Amount and an Excess Subscriber Equivalent
     Amount, zero;

          (b)  a Shortfall EBITDA Amount and a Shortfall Subscriber Equivalent
     Amount,

               (i)  the greater of such shortfall amounts multiplied by 0.75
          plus

               (ii) the lesser of such shortfall amounts multiplied by 0.25;
          and

          (c)  an Excess EBITDA Amount and a Shortfall Subscriber Equivalent
     Amount or an Excess Subscriber Equivalent Amount and a Shortfall EBITDA
     Amount,

               (i)  such shortfall amount multiplied by 0.75 minus

               (ii) such excess amount; provided, that, in no event shall the
          product derived in subparagraph (c)(i) above, be reduced by more than
          the product of such shortfall amount multiplied by 0.1875.

                                       F-1
<PAGE>

                   (Excess and Shortfall Amount Definitions)

     "Excess EBITDA Amount" shall mean the product of (i) the EBITDA Surplus
Amount, if any, multiplied by (ii) 7.693, multiplied by (iii) a fraction the
numerator of which is (x) 12 and the denominator of which is (y) the number of
months in the Operational Adjustment Period (such fraction, the "Closing Period
Fraction"), multiplied by (iv) 0.897.

     "Shortfall EBITDA Amount" shall mean the product of (i) the EBITDA Deficit
Amount, if any, multiplied by (ii) 7.693, multiplied by (iii) the Closing Period
Fraction, multiplied by (iv) 0.897.

     "Excess Subscriber Equivalent Amount" shall mean the product of (i) the
Subscriber Equivalent Surplus Amount, if any, multiplied by (ii) $39.88,
multiplied by (iii) 12, multiplied by (iv) 0.4502, multiplied by (v) 11.423,
multiplied by (vi) 0.897.

     "Shortfall Subscriber Equivalent Amount" shall mean the product of (i) the
Subscriber Equivalent Deficit Amount, if any, multiplied by (ii) $39.88,
multiplied by (iii) 12, multiplied by (iv) 0.4502, multiplied by (v) 11.423,
multiplied by (vi) 0.897.

                                       F-2
<PAGE>

                   (Surplus and Deficit Amount Definitions)

     "EBITDA Surplus Amount" shall mean the excess, if any, of (x) the Actual
Pre-Marketing EBITDA Amount over (y) the Projected Pre-Marketing EBITDA Amount.

     "EBITDA Deficit Amount" shall mean the excess, if any, of (x) the product
of (i) 0.95 multiplied by (ii) the Projected Pre-Marketing EBITDA Amount over
(y) the Actual Pre-Marketing EBITDA Amount.

     "Subscriber Equivalent Surplus Amount" shall mean in the event that there
shall exist:

          (a)  a Non Pre-Paid Subscriber Surplus Amount and a Pre-Paid
     Subscriber Equivalent Surplus Amount, the sum of such amounts;

          (b)  a Non Pre-Paid Subscriber Deficit Amount and a Pre-Paid
     Subscriber Equivalent Deficit Amount, zero;

          (c)  a Non Pre-Paid Subscriber Surplus Amount and a Pre-Paid
     Subscriber Equivalent Deficit Amount or a Non Pre-Paid Subscriber Deficit
     Amount and a Pre-Paid Subscriber Equivalent Surplus Amount, the excess, if
     any, of such surplus amount over such deficit amount.

     "Subscriber Equivalent Deficit Amount" shall mean in the event that there
shall exist:

          (a)  a Non Pre-Paid Subscriber Deficit Amount and a Pre-Paid
     Subscriber Equivalent Deficit Amount, the sum of such amounts;

          (b)  a Non Pre-Paid Subscriber Surplus Amount and a Pre-Paid
     Subscriber Equivalent Surplus Amount, zero; or

          (c)  a Non Pre-Paid Subscriber Deficit Amount and Pre-Paid Subscriber
     Equivalent Surplus Amount or a Non Pre-Paid Subscriber Surplus Amount and a
     Pre-Paid Subscriber Equivalent Deficit Amount, the excess, if any, of such
     deficit amount over such surplus amount.

     "Pre-Paid Subscriber Equivalent Surplus Amount" shall mean the excess, if
any, of (x) the Actual Pre-Paid

                                      F-3
<PAGE>

Subscriber Equivalent Net Adds over (y) the Projected Pre-Paid Subscriber
Equivalent Net Adds.

     "Pre-Paid Subscriber Equivalent Deficit Amount" shall mean the excess, if
any, of (x) the product of (i) 0.95 multiplied by (ii) the Projected Pre-Paid
Subscriber Equivalent Net Adds over (y) the Actual Pre-Paid Subscriber
Equivalent Net Adds.

     "Non Pre-Paid Subscriber Surplus Amount" shall mean the excess, if any, of
(x) the Actual Non Pre-Paid Subscriber Net Adds over (y) the Projected Non Pre-
Paid Subscriber Net Adds.

     "Non Pre-Paid Subscriber Deficit Amount" shall mean the excess, if any, of
(x) the product of (i) 0.95 multiplied by (ii) the Projected Non Pre-Paid
Subscriber Net Adds over (y) the Actual Non Pre-Paid Subscriber Net Adds.

                                      F-4
<PAGE>

                      (Projected and Actual Definitions)

          "Projected Pre-Marketing EBITDA Amount" shall mean the projected
aggregate Pre-Marketing EBITDA of Chicago Cellular and Central Illinois Cellular
set forth on Annex I to this Exhibit for the months in the Operational
Adjustment Period.

          "Actual Pre-Marketing EBITDA Amount" shall mean the actual aggregate
Pre-Marketing EBITDA of Chicago Cellular and Central Illinois Cellular for the
Operational Adjustment Period, calculated on a basis consistent with the
calculation of the Projected Pre-Marketing EBITDA Amount.

          "Projected Pre-Paid Subscriber Equivalent Net Adds" shall mean the
projected aggregate Pre-Paid Subscriber Equivalent Net Adds set forth on Annex
II to this Exhibit for the months in the Operational Adjustment Period.

          "Actual Pre-Paid Subscriber Equivalent Net Adds" shall mean the actual
aggregate Pre-Paid Subscriber Equivalent Net Adds for the Operational
Adjustment Period, calculated on a basis consistent with the calculation of the
Projected Pre- Paid Subscriber Equivalent Net Adds; provided, that, in no event
shall such sum be greater than 150% of the Projected Pre-Paid Subscriber
Equivalent Net Adds.

          "Projected Non Pre-Paid Subscriber Net Adds" shall mean the projected
aggregate Non Pre-Paid Subscriber Net Adds set forth on Annex III to this
Exhibit for the months in the Operational Adjustment Period.

          "Actual Non Pre-Paid Subscriber Net Adds" shall mean the actual
aggregate Non Pre-Paid Subscriber Net Adds for the Operational Adjustment
Period, calculated on a basis consistent with the calculation of the Projected
Non Pre-Paid Subscriber Net Adds.

                                       F-5
<PAGE>

                          (Miscellaneous Definitions)

          "Pre-Marketing EBITDA" shall mean Operating Income plus Depreciation
and Amortization expenses plus Sales and Marketing expenses, excluding the
effect of any and all non-recurring items (including, without limitation, any
expenses, directly or indirectly incurred in connection with the acquisition of
the Companies by Buyer pursuant to the Agreement) and calculated in accordance
with the accounting policies and procedures used in the preparation of the
applicable budgets for Chicago Cellular and Central Illinois Cellular and their
respective Subsidiaries on a consolidated basis for the twelve-month periods
ending December 31, 1999 and December 31, 2000.

          "Pre-Paid Subscriber Equivalent Net Adds" shall mean the product of
(a) 0.5 multiplied by (b)(i) the aggregate number of gross additions of Pre-Paid
Subscribers minus (ii) the aggregate number of gross terminations of Pre-Paid
Subscribers of Chicago Cellular and Central Illinois Cellular (such number of
gross terminations, for purposes of this calculation, excluding the termination
of 20,920 prepaid accounts as described in Section 6.24 (Prepaid Accounts) of
the Agreement).

          "Non Pre-Paid Subscriber Net Adds" shall mean (a) the aggregate number
of gross additions of Non Pre-Paid Subscribers minus (b) the aggregate number of
gross terminations of Non Pre-Paid Subscribers (such number of gross
terminations, for purposes of this calculation, excluding the termination of any
Employee Customers as described in Section 6.21(a) (Employee Customers) of the
Agreement).

          "Pre-Paid Subscribers" shall mean customers of Chicago Cellular and
Central Illinois Cellular who pay for cellular services in advance and who do
not receive a monthly bill for such services.

          "Non Pre-Paid Subscribers" shall mean all customers of Chicago
Cellular and Central Illinois Cellular other than Pre-Paid Subscribers.

          "Operational Adjustment Period" shall mean the period commencing March
1, 1999 through the end of the month preceding the month in which the Closing
occurs.

                                      F-6

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