OMNIPOINT CORP \DE\
8-K/A, 1996-07-18
RADIOTELEPHONE COMMUNICATIONS
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                  FORM 8-K/A

                                CURRENT REPORT

                    PURSUANT TO SECTION 13 OR 15(D) OF THE
                        SECURITIES EXCHANGE ACT OF 1934

               Date of Report (Date of earliest event reported):
                                 April 16, 1996
                 ---------------------------------------------

                             OMNIPOINT CORPORATION
              (Exact Name of Registrant as Specified in Charter)

             Delaware                   0-27442                  04-2969720
         ----------------           ---------------          -------------------
     (State of Incorporation)   (Commission File Number)        (IRS Employer
                                                             Identification No.)

                       2000 North 14th Street, Suite 500
              Arlington, VA                                  22201
       ----------------------------------------------------------------
          (Address of principal executive offices)         (Zip Code)

                                (703) 522-7778
                        -------------------------------
                        (Registrant's telephone number)
<PAGE>
 
Item 5.  Other Events.
         ------------ 

        On April 16, 1996, Omnipoint Corporation (the "Company") and Ericsson
Inc. ("Ericsson") entered into definitive agreements governing (i) the licensing
and OEM arrangement relating to the Company's proprietary IS-661 technology,
(ii) the purchase by the Company's affiliates, including Omnipoint
Communications Inc., of PCS 1900 handsets, (iii) the sale by Ericsson of
infrastructure equipment, subject to completion of vendor financing agreements,
for which the parties have entered into a non-binding commitment letter
regarding the Company's New York MTA network, and (iv) cooperation on marketing,
standards and technical activities.  Also in April 1996, the Company and Orbitel
Mobile Communications Limited ("Orbitel"), a wholly-owned subsidiary of
Ericsson, have entered into a non-binding memorandum of understanding involving
Orbitel's development of IS-661 and dual mode IS-661/PCS 1900 handsets.  Over
the next five years, Ericsson could receive more than $350 million of network
equipment and services as well as $100 million for purchases of IS-661 and PCS
1900 handsets.

        The agreements are for a combination of IS-661 and PCS 1900
technologies, which both utilize GSM-based network architecture.  The initial
system configuration includes mobile switching centers, base station controllers
and radio base station equipment as well as implementation and support services.

<TABLE>
<CAPTION>
 
Item 7.  Exhibits
 
        Exhibit No.                             Description
        -----------                             ----------- 
        <S>                  <C>
 
            1*               Acquisition Agreement for Ericsson CMS 40 Personal
                             Communications Systems (PCS) Infrastructure
                             Equipment, dated as of April 16, 1996, by and
                             between Ericsson Inc. and Omnipoint Communications
                             Inc.

            2*               Acquisition Supply and License Agreement for
                             Omnipoint Personal Communications Systems (PCS)
                             Infrastructure Products, dated as of April 16,
                             1996, by and between Ericsson Inc. and Omnipoint
                             Corporation

            3*               Agreement for Purchase and Sale of Ericsson Inc.
                             Mobile Terminal Units, dated as of April 16, 1996,
                             by and between Ericsson Inc. and Omnipoint
                             Communications Inc.

            4*               Memorandum of Understanding, dated April 2, 1996,
                             by and between Omnipoint Corporation and Orbitel
                             Mobile Communications Ltd.
</TABLE>

*  Portions of this Exhibit were omitted and have been filed separately with the
Secretary of the Commission pursuant to the Company's Application Requesting
Confidential Treatment under Rule 24b-2 of the Securities Exchange Act of 1934,
as amended, filed on June 27, 1996.

                                      -2-
<PAGE>
 
                                   SIGNATURES
                                   ----------

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


Date:  June 27, 1996         OMNIPOINT CORPORATION



                                  By:        /s/ Edwin M. Martin, Jr.
                                       ----------------------------------------
                                           Edwin M. Martin, Jr., Secretary

                                      -3-
<PAGE>
 
                             OMNIPOINT CORPORATION

                                    FORM 8-K

                                 EXHIBIT INDEX
<TABLE>
<CAPTION>
 
                                                                  Sequentially
Exhibit No.                              Description              Numbered Pages
- -----------                              -----------              --------------
<S>                          <C>                                  <C>
 
    1*                       Acquisition Agreement for Ericsson
                             CMS 40 Personal Communications
                             Systems (PCS) Infrastructure
                             Equipment, dated as of April 16,
                             1996, by and between Ericsson Inc.
                             and Omnipoint Communications Inc.

    2*                       Acquisition Supply and License
                             Agreement for Omnipoint Personal
                             Communications Systems (PCS)
                             Infrastructure Products, dated as
                             of April 16, 1996, by and between
                             Ericsson Inc. and Omnipoint
                             Corporation

    3*                       Agreement for Purchase and Sale of
                             Ericsson Inc. Mobile Terminal
                             Units, dated as of April 16, 1996,
                             by and between Ericsson Inc. and
                             Omnipoint Communications Inc.

    4*                       Memorandum of Understanding, dated
                             April 2, 1996, by and between
                             Omnipoint Corporation and Orbitel
                             Mobile Communications Ltd.
</TABLE>

*  Portions of this Exhibit were omitted and have been filed separately with the
Secretary of the Commission pursuant to the Company's Application Requesting
Confidential Treatment under Rule 24b-2 of the Securities Exchange Act of 1934,
as amended, filed on June 27, 1996.

                                      -4-

<PAGE>

                                                                       Exhibit 1

                                                                           FINAL
                                                                  EXECUTION COPY


                                                              CONTRACT NO.: 9107
                                                              ------------------



                             ACQUISITION AGREEMENT

                                      FOR

             ERICSSON CMS 40 PERSONAL COMMUNICATION SYSTEMS (PCS)

                           INFRASTRUCTURE EQUIPMENT

                                BY AND BETWEEN


                                 ERICSSON INC.

                                      AND

                         OMNIPOINT COMMUNICATIONS INC.
<PAGE> 

                                                             CONFIDENTIAL

                               TABLE OF CONTENTS

Article 1  DEFINITIONS.....................................1
Article 2  SCOPE OF AGREEMENT..............................9
Article 3  TERM OF AGREEMENT...............................9
Article 4  PRICES..........................................9
Article 5  TERMS OF PAYMENT...............................12
Article 6  ORDERS AND SCHEDULING..........................16
Article 7  ORDER CANCELLATION AND MODIFICATION............19
Article 8  INSTALLATION...................................19
Article 9  ACCEPTANCE TESTING AND ACCEPTANCE..............20
Article 10 DELAY..........................................22
Article 11 BUYER'S RESPONSIBILITIES.......................25
Article 12 SELLER'S RESPONSIBILITIES......................30
Article 13 WARRANTIES.....................................36
Article 14 SYSTEM SUPPORT SERVICES........................48
Article 15 CONTINUITY OF EXPANSION FUNCTIONALITY..........48
Article 16 AMENDMENTS.....................................48
Article 17 TITLE AND RISK OF LOSS.........................48
Article 18 INSURANCE......................................49
Article 19 SOFTWARE; CONFIDENTIAL INFORMATION.............50
Article 20 TAXES..........................................52

                                      -i-
<PAGE>

Article 21 INDEMNIFICATION AND LIMITATION OF LIABILITY....53
Article 22 INTELLECTUAL PROPERTY RIGHTS INFRINGEMENT......54
Article 23 DISPUTES.......................................55
Article 24 TERMINATION AND DEFAULT........................57
Article 25 ADVERTISING....................................60
Article 26 LATE PAYMENTS..................................60
Article 27 COVENANT NOT TO RECRUIT........................61
Article 28 ASSIGNMENT AND EQUITABLE REMEDIES..............61
Article 29 NOTICES........................................62
Article 30 AUTHORITY AND COMPLIANCE WITH LAWS.............62
Article 31 HEADINGS AND PLURALS...........................63
Article 32 GOVERNING LAW; SEVERABILITY....................63
Article 33 NO WAIVER......................................63
Article 34 ENTIRETY OF AGREEMENT; NO ORAL CHANGES.........63
Article 35 ATTACHMENTS AND INCORPORATION..................64
Article 36 COUNTERPARTS...................................65

                                     -ii-
<PAGE>
                                                                           FINAL
                                                                  EXECUTION COPY
                                                                  --------------


                             ACQUISITION AGREEMENT

                                      FOR

              ERICSSON CMS 40 PERSONAL COMMUNICATION SYSTEM (PCS)

                            INFRASTRUCTURE EQUIPMENT


THIS ACQUISITION AGREEMENT (the "Agreement"), is made and effective as of the
16th day of April, 1996, by and between Omnipoint Communications Inc., a
Delaware corporation, with its principal place of business in Mountain Lakes,
New Jersey ("OCI" or "Buyer") and Ericsson Inc., a Delaware corporation, with
its principal place of business in Richardson, Texas, acting through its Radio
Systems Division ("Ericsson"), and this Agreement shall permit the addition of
such of Buyer's Affiliates (as defined below) as may from time to time desire to
make purchases of Ericsson equipment and services pursuant to the terms and
conditions set forth herein.

ARTICLE 1   DEFINITIONS
            -----------

As used herein, the following definitions apply:

       AMPS means Advanced Mobile Phone Service (i.e., the analog transmission
       technique used in the United States for 800 MHz cellular service.)

       ASIC means Application Specific Integrated Circuit.

       Applicable Purchases has the meaning ascribed at Section 11.9.1.

       BSC means Base Station Controller.

       BTA means a Basic Trading Area, a geographic area designated by the
       Federal Communications Commission for the purpose of granting
       authorizations to construct and operate PCS networks.

       BTS or Base Station means or refers to a single physical location and
       enclosures thereof of one or more base transceiver stations in the
       System.

       Base Station Configuration means the Equipment, Software and Installation
       at a Base Station required to operate and control a particular base
       transceiver station at a Base Station.
<PAGE>


                                                                    CONFIDENTIAL

       Base Station Configuration Engineering means the engineering required, on
       a site-specific basis, to establish the Base Station Configuration
       Installation specifications, including, but not limited to: preparing
       Equipment lists, Equipment layout drawings, Equipment labels, cable
       ladder layout drawings, and "as-built" drawings and documentation.  Base
       Station Configuration Engineering also includes the design for DC power
       distribution for Base Station Configurations.

       Base Station Facilities Engineering means the engineering required to
       design a specific Base Station, including, but not limited to: property
       survey, soil report, Base Station layout, drawings and specifications for
       the construction of the Base Station, shelters, towers, generators,
       grounding analysis, and all other items required to make the Base Station
       functional. Base Station Facilities Engineering does not include Base
       Station Configuration Engineering.

       Buyer's Affiliate(s) means any partnership, corporation or other entity
       in which Buyer owns a twenty percent (20%) or greater equity interest or
       any entity controlling, controlled by or under common control with Buyer
       after applying the attribution rules of Section 318 of the Code which
       operates or is authorized to operate a Cellular System or PCS system in
       North America including the Caribbean Islands. Affiliate shall also refer
       to any corporation, partnership or other entity which has a marketing
       affiliation agreement with Buyer to market its Cellular System or PCS
       system under the brand name used by Buyer to market its Cellular Systems
       and/or PCS systems in North America including the Caribbean Islands
       ("Marketing Affiliates").  Among other things such marketing affiliation
       agreement shall require a Marketing Affiliate to use Buyer's billing
       system and have a roaming agreement with Buyer.

       CODEC means Coder-Decoder.

       Change of Control means and shall be deemed to have ensued upon the first
       to occur of the following events:

                 (A) any person becomes the beneficial owner, directly or
       indirectly, of securities of a company representing 50% or more of the
       combined voting power of the company's then outstanding voting securities
       and such person has the ability to elect a majority of the members of the
       company's Board of Directors, if such ownership is not in place on the
       date of grant;

                 (B) any person becomes the beneficial owner, directly or
       indirectly, of securities of the company sufficient to elect a majority
       of the members of the Board of Directors of the company; or

                 (C) the sale of all or substantially all the assets of the
       company, or a merger, consolidation, or similar transaction of the
       company in which the company is not the surviving entity or the company's
       stockholders immediately prior 

                                      -2-
<PAGE>
                                                                    CONFIDENTIAL

                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED                   
                        SEPARATELY WITH THE COMMISSION

       to such transaction hold less than 50% of the voting securities of the
       surviving entity.

                 A Change in Control shall not include either of the following
       events:

                 (A) a transaction, the sole purpose of which is to change the
       state of the company's incorporation; or

                 (B) a transaction, the result of which is to sell all or
       substantially all of the assets of the company to another entity (the
       "surviving entity"); provided that the surviving entity is owned directly
       or indirectly by the company's stockholders immediately following such
       transaction in substantially the same proportions as their ownership of
       the company's voting capital stock immediately preceding such
       transaction.

       Civil Work means the labor and materials necessary in the performance of
       demolition, construction and renovation work (e.g., roads, grading,
       fencing, structural improvements, etc.) at a Network Element location and
       at each Base Station to assure that each Base Station and Network Element
       location is ready for Installation of the Equipment.

       Civil Work Supervision means the supervision of Civil Work.

       Code means the Internal Revenue Code of 1986, as amended.

       Commercial Service means the commercial use of the System, or a portion
       thereof, exclusive of operation for purposes of conducting Acceptance
       Tests, where (i) for the New York BTA more than*
       paying customers are receiving service on the System in question and (ii)
       for all markets excluding the New York BTA such number of paying
       customers receiving service on the System in question shall be*       of
       the POPs for such market or*        whichever is greater, and that
       revenue is expected to be received from such customers . Commercial
       service shall exclude the traditional "friendly user" pre-commercial test
       operation, even though revenue may be received from the "friendly users".

       Confidential Matters means all information about the business and
       financial matters (including costs, profits and plans for future
       development, training materials, documentation, methods of operation and
       marketing concepts) and any other proprietary information relating to a
       party hereto or its affiliates and their respective operations,
       businesses and financial affairs, that is obtained by the other party
       hereto as a result of the working relationship between the parties hereto
       with respect to the subject matter hereof, whether obtained prior to or
       after the date hereof; provided, however, that Confidential Matters shall
       not include information that (a) is or becomes generally available to the
       public other than as the result of wrongful disclosure by the recipient
       hereunder, its affiliates or their respective representatives, or (b) was
       available to the recipient or its affiliates or their respective
       representatives on a 

                                      -3-
<PAGE>


                                                                    CONFIDENTIAL

       nonconfidential basis prior to disclosure hereunder, or (c) is
       independently developed by the recipient hereunder, or (d) becomes
       rightfully available to the recipient from a third party that is under no
       obligation to maintain such information as confidential.

       Critical Fault has the meaning ascribed in Section 13.13.1.

       Deliverables has the meaning ascribed in Section 2.3.

       Documentation means all the documentation (including all books, manuals,
       memoranda and other written materials) needed to understand and operate
       the System, and all components thereof, described and set forth in
       Attachment E.  All Documentation provided to Buyer and its Affiliates
       shall be printed in English and provided in CD ROM format to the extent
       such documentation represents Seller's standard documentation or to the
       extent such documentation is presently available in CD ROM format.  For
       those documentation items that are not presently available in CD ROM
       format, Ericsson shall use commercially reasonable efforts to provide
       such items in CD ROM format.

       EI&T means Engineering, Installation and Testing.

       Electronic Deliverables has the meaning ascribed at Section 20.1.

       Equipment means equipment specified in Attachment A to this Agreement,
       all Network Elements and such other PCS equipment as Seller may hereafter
       make available to Buyer and which Buyer hereafter orders from Seller
       under this Agreement.  Equipment does not include subscriber equipment,
       which shall mean subscriber handsets, mounting hardware, test equipment,
       antennas and similar subscriber equipment, or any equipment purchased by
       Buyer from another supplier.

       Expansions means Equipment, Software, any Installation or other services
       purchased under this Agreement for addition to or improvement of the
       Initial Configuration.

       Facilities Preparation Services means Civil Work, Civil Work Supervision,
       Ground Plan Architectural Work, Structural Architectural Work, and
       Utilities Work.

       Features means new Software functionality or substantial performance
       improvement that is made available to all users for the then-current
       Software release. Features are licensed to Buyer individually and may be
       subject to an additional license fee. Once licensed they become a part of
       the Software.

       GSM means Global System for Mobile communications.

       Ground Plan Architectural Work means the preparation of architectural
       drawings necessary to obtain zoning permits and conditional use permits.

                                      -4-
<PAGE>
                                                                    CONFIDENTIAL

       Handset means a mobile station intended to be used while in motion or
       during halts at unspecified points and conforming to PCS 1900 standard,
       IS-661 standards, or both as the context requires. Handsets include
       handheld portable units and units installed in vehicles.

       Handset Agreement means that separate agreement by and between Buyer and
       Seller governing the supply and purchase of PCS 1900 Handsets.

       Initial Configuration means for each BTA or MTA in which a new Network
       Element is installed, the portion of the System intended by the parties
       to be constructed and installed and optimized as a unit, as described and
       set forth in Attachment A. Commercial service in the BTA or MTA will be
       initiated using the Initial Configuration. Initial Configuration does not
       include Expansions thereto (e.g., additional Base Station Configurations
       or additional Network Element Configurations added to a previously
       constructed system).

       Installation means the performance and supervision by Seller of all
       installation purchased from and performed by Seller of Equipment and
       Software and as described in Article 8.

       MSC means Mobile Switching Center.

       MTA means a Major Trading Area, a geographic area designated by the
       Federal Communications Commission for the purpose of granting
       authorizations to construct and operate PCS networks, or where Buyer is
       awarded an authorization by an equivalent authority of the Mexican
       government (or the appropriate subdivision thereof), MTA shall be deemed
       to mean the analogous area authorized to Buyer; and Seller shall sell
       Deliverables to Buyer hereunder for use in Mexico, with such Deliverables
       being trans-shipped or otherwise delivered into Mexico.

       MTBF means Mean Time Between Failures.

       MTTR means Mean Time To Repair.

       Material Default means the occurrence of any of the following events: (i)
       Seller's failure to deliver Deliverables as ordered by Buyer after being
       given reasonable opportunity to cure such condition pursuant to the terms
       of this Agreement or (ii) any such breach or default of the terms and
       conditions of this Agreement that either directly or indirectly result in
       a materially adverse impact on Buyer.

       Network Element means the Equipment and Software purchased from SELLER
       required to perform switching, transmission or network node functions for
       a System (e.g., Authentication Center ("AUC"), BSC, Equipment Identity
       Register ("EIR"), Messaging System ("MXE"), Mobile Switching
       Center/Visitor Location Register ("MSC/VLR"), Mobile Intelligent Network
       ("MIN"), Service Signaling Point ("SSP"), 

                                      -5-
<PAGE>

                                                                    CONFIDENTIAL

       Home Location Register ("HLR"), Service Control Point ("SCP") and MSC).
       For purposes of this Agreement, the term Network Element includes Base
       Stations.

       Network Element Configuration means the Equipment, Software, Installation
       and other applicable services rendered by Seller hereunder at a Network
       Element Location required to perform the switching or network node
       functions as referenced in Article 1.16 above; provided, however, that a
       Network Element expansion shall not be deemed a Network Element
       Configuration unless such expansion includes, or is a major modification
       of, a central processing unit (e.g. APZ 212, BSC, HLR, MSC/VLR, etc.).

       Network Element Configuration Engineering means the engineering required
       to establish Network Element Installation specifications, including;
       preparing Equipment lists, Equipment layout drawings, Equipment labels,
       cable tray layout drawings, and "as-built" drawings and Documentation.
       Network Element Configuration Engineering also includes the design for DC
       power distribution for Network Elements.

       Network Element Facilities Engineering means the engineering required to
       design a specific Network Element Location, including; property survey,
       soil report, building layout, drawings and specifications for the
       construction of the building, towers, generators, and all other items
       required to make the Network Element facility or facilities functional.
       Network Element Facilities Engineering does not include Network Element
       Configuration Engineering.

       Network Element Location means generally the physical location and
       enclosures thereof for a Network Element.

       Nortel shall mean Northern Telecom, Ltd.

       OAM&P means Operations and Maintenance Procedures.

       OEM means Original Equipment Manufacturer.

       Omnipoint means Omnipoint Corporation, a Delaware corporation with its
       executive offices located at 1365 Garden of the Gods Road, Colorado
       Springs, CO  80907

       Operations Support System ("OSS") means a combination of hardware and
       software platforms which provide tools for operating, maintaining,
       analyzing and provisioning the System, as further described in Attachment
       B.

       Orbitel means Orbitel Mobile Communications, Ltd.

       Orbitel Handset Supply Agreement means that certain and separate
       agreement by and between Buyer and Orbitel governing the supply and
       purchase of dual mode PCS1900/IS-661 Handsets and single mode IS-661
       Handsets.

                                      -6-
<PAGE>
                                                                    CONFIDENTIAL


       PCS means Personal Communications Systems

       Primarily means (i) greater than 50% or (ii) the party who is more than
       50% responsible, as the context requires.

       Professional Services means those services offered by Seller relating to
       System design, construction, enhancement and optimization as described
       and set forth in Attachment C and as priced in Attachment A.

       Punch List means that list prepared in conjunction with the  Acceptance
       Tests and included in the Acceptance Certificate pursuant to Article 9,
       which contains one or more items which have not been fully completed by
       Seller as of Acceptance of the System or any System segment.

       Purchase Order has the meaning ascribed at Section 6.6.

       RBS or Radio Base Station means a Base Station.

       Section means when used without any other reference, sections, including
       subsections, within this Agreement

       Seller means Ericsson and any Affiliate of Ericsson from which Buyer or
       any of Buyer's Affiliates purchase equipment pursuant to the terms of
       this Agreement.

       Service Affecting Fault has the meaning ascribed at Section 13.13.6.

       Site Acquisition Services means the services described and set forth in
       Attachment C, which are necessary for identifying, acquiring, and making
       ready the System sites.

       Software means (a) all computer software furnished hereunder by Seller to
       Buyer for use primarily in conjunction with the Equipment including, but
       not limited to, computer programs contained on a magnetic or optical
       storage medium, in a semiconductor device, on a disk or in another memory
       device or system memory consisting of (i) hard-wired logic instructions
       which manipulate data in central processors, control input-output
       operations, and error diagnostic and recovery routines, (ii) instruction
       sequences in machine-readable code that control call processing,
       peripheral equipment and administration and maintenance functions; (b)
       Software Enhancements, Software Features and Software Updates furnished
       by Seller to Purchaser hereunder; and (c) Documentation furnished
       hereunder for use and maintenance of the Software.

       Software Enhancements means modifications or improvements made to the
       Software that improve performance or capacity of the Software, and such
       Software Enhancements may also include bug fixes.

                                      -7-
<PAGE>
                                                                    CONFIDENTIAL


       Software Features means distinct programs that constitute additional
       functions to the Software.

       Software Updates means periodic updates to the Software issued by Seller
       to customers under Warranty and Software Maintenance obligations to
       correct defects in the Software.

       Specifications means the specifications and performance standards of the
       System as set forth on Seller's Product Marketing Reference Document
       current at the time of the order.

       Structural Architectural Work means the preparation of all architectural
       drawings and blueprints relating to the structural specifications for the
       Network Element Locations or Base Stations.

       System Support Services means those services offered by Seller for
       maintenance of Equipment and Software pursuant to Article 14, which are
       described and set forth in Attachment D and as priced in Attachment A.

       System means the Initial Configuration and all Expansions thereto
       purchased by Buyer from Seller pursuant to this Agreement, including all
       Equipment, Software, Installation and other services purchased from
       Seller by Buyer hereunder relating to the System.

       TRAU or Transcoder Rate Adaptation Unit means a device that modulates and
       demodulates a user's voice or data transmissions and multiplexes or de-
       multiplexes the 16 kb/s intermediate data rate used for transmission
       between a BSC and BTS to and from the standard 64 kb/s data rate used in
       the external network and certain Network Elements within the PCS 1900
       system.

       TRU or Transmitter Receiver Unit means a transmitting and receiving
       module intended to be installed as a separate module into a BTS.

       Technical Education means the training courses offered by Seller as set
       forth in Attachment Q.

       Utilities Work means the installation of electric and telephone utilities
       at the Network Element Locations and Base Stations.

       VOCODER means Voice Coder.

                                      -8-
<PAGE>
                                                                    CONFIDENTIAL
                        *CONFIDENTIAL INFORMATION;      
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

ARTICLE 2   SCOPE OF AGREEMENT

2.1    INITIAL CONFIGURATION. UPON THE TERMS AND CONDITIONS HEREIN SET FORTH,
       BUYER HEREBY AGREES TO PURCHASE FROM SELLER, AND SELLER HEREBY AGREES TO
       SELL TO BUYER FOR INSTALLATION AND OPERATION IN THE NEW YORK MTA MARKETS,
       THE INITIAL CONFIGURATION OF THE SYSTEM, INCLUDING THE EQUIPMENT,
       SOFTWARE, INSTALLATION AND ANY DOCUMENTATION ORDERED THEREFOR, OSS, AS
       WELL AS ANY OTHER SERVICES DESCRIBED HEREIN THAT MAY BE ORDERED BY BUYER
       AS PART OF THE INITIAL CONFIGURATION.

2.2    ADDITIONAL GOODS AND SERVICES. IN ACCORDANCE WITH THE PROCEDURES SET
       FORTH IN ARTICLE 6, BUYER MAY ORDER ADDITIONAL EQUIPMENT AND SOFTWARE FOR
       EXPANSIONS TO THE INITIAL CONFIGURATION, AND TO THE EXTENT AVAILABLE
       UNDER THIS AGREEMENT, HANDSETS, AS WELL AS BASE STATION FACILITIES
       ENGINEERING, FACILITIES PREPARATION SERVICES, NETWORK ELEMENT FACILITIES
       ENGINEERING, SITE ACQUISITION SERVICES, SYSTEM SUPPORT SERVICES,
       PROFESSIONAL SERVICES, AND SUCH OTHER SERVICES AS SELLER MAY FROM TIME TO
       TIME OFFER TO ITS CUSTOMERS.

2.3    DELIVERABLES DEFINED. THE GOODS AND SERVICES DESCRIBED IN SECTIONS 2.1
       AND 2.2 ARE SOMETIMES HEREIN REFERRED TO AS "DELIVERABLES."

ARTICLE 3   TERM OF AGREEMENT

This Agreement shall commence on the date first written above and continue until
the fifth (5th) anniversary thereof (hereinafter, the "Term") unless terminated
on an earlier date as provided herein, except as to those provisions that, by
their express terms, survive such termination.

ARTICLE 4   PRICES

4.1    UNIT PRICES AND APPLICABLE VOLUME DISCOUNTS. The eqipmennt list,
       associated unit prices and applicable volume discounts are set forth in
       Attachment A.  The equipment list set forth in Attachment A constitutes a
       ------------                                   ------------
       complete identification of all seller equipment offered under Seller's
       PCS 1900 product line.  The prices set forth in Attachment A and the
                                                       ------------
       volume discounts to be included therein are calculated on the basis that
       Buyer will receive a *     "initial discount" on all of its purchases
       hereunder coupled with additional volume discounts of *        on all
       Equipment purchases and *
       on all Software purchases.

                                      -9-
<PAGE>

                        *CONFIDENTIAL INFORMATION;                  CONFIDENTIAL
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

4.2    PRICE VARIATION. Subject to the conditions of Aection 4.8 below, the
       prices for Deliverables shown in Attachment A-1 are firm, fixed prices,
                                        --------------
       except where a material price adjustment is necessary and permitted in
       accordance with the terms and criteria of the variation formula as set
       forth in Attachment A-1.  Prices for Deliverables or other goods and
                --------------
       services not set forth in Attachment A-1, if not otherwise established in
                                 --------------
       this Agreement, shall, subject to the terms and conditions of Section
       4.8, *



4.3    PRICES INCLUDE DELIVERY. The unit prices of the Equipment are
       delivered prices, with the Equipment delivered by common carrier to a
       Network Element Location, a central storage site, or Base Station
       specified by Buyer.  The Installation prices include (i) delivery charges
       by common carrier from the Network Element Location or central storage
       site to the site of Installation, and (ii) Base Station Configuration
       Engineering and Network Element Configuration Engineering, as applicable.
       Seller's unit prices also include any warehousing, staging or other
       storage fees necessary to seller's performance, however, installation
       charges specifically exclude any costs for cranes or helicopters utilized
       to install any of Equipment to be installed pursuant to this Agreement.
       Buyer understands that costs for cranes and helicopters shall be borne by
       it, provided that Seller obtains Buyer's prior written consent to utilize
       such installation methods.  In the event a crane, helicopter or other
       such extraordinary means are required to install equipment, Seller agrees
       that Seller's actual costs for such services will be passed on directly
       to Buyer with no additional markup thereon.

4.4    PRICES FOR OPERATION SUPPORT SYSTEM. THE PRICES FOR THE SERVICE PORTION
       OF OSS ARE SET FORTH IN ATTACHMENT A.
                               ------------

4.5    PRICES FOR OTHER SERVICES. The prices of System Support Services,
       including Professional Services, and Documentation are set forth in
       Attachment A.  The prices for Technical Education courses are set forth
       ------------
       in Attachment A.
          ------------

4.6    CERTAIN ENGINEERING SERVICES. Network Element Configuration Engineering
       and Installation must be purchased for Network Element Configurations
       based on Seller's AXE architecture ordered hereunder. The prices of Base
       Station Facilities 

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       Engineering, Base Station Configuration Engineering and Network Element
       Facilities Engineering shall be determined by Seller on a quote basis, if
       such services are purchased from Seller.

4.7    FACILITIES PREPARATION AND SITE ACQUISITION SERVICES. The price for any
       Facilities Preparation Services and Site Acquisition Services shall be
       determined in accordance with the procedure set forth in Section 6.4.


4.8    *

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ARTICLE 5   TERMS OF PAYMENT

5.1    MONTHLY INVOICES. Seller shall invoice Buyer no more than twice per month
       for all amounts due hereunder. Upon request by Buyer, the parties will
       work in good faith to develop an electronic invoicing and payment
       management system upon a schedule to which the parties mutually agree,
       which system may include disk copies of invoices or electronic
       transmission of data.  Unless specified otherwise herein, all invoices
       submitted by Seller to Buyer pursuant to this Agreement shall be due and
       payable *

5.2    *

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                                       *

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5.3    INITIAL CONFIGURATION. Buyer shall pay for the Initial Configuration
       Equipment and Software as follows:

       5.3.1  *



       5.3.2  ACCEPTANCE. Where Installation is performed by Seller, an
              additional *
                      of the total price (with the aggregate amount invoiced
              under Section 5.3.1 and 5.3.2 being equal to *
              including *
                        may be invoiced upon Acceptance of an Initial
              Configuration. Should installation of any BTSs in an Initial
              Configuration be performed by Buyer, the remaining *
                        of the total price for such BTSs shall be due thirty
              (30) days after receipt of such BTSs by Buyer.

       5.3.3  PUNCH LIST BALANCE. On a site by site basis, the
 
              *    unpaid balance of the price will be due after Seller has
              cleared and Buyer approved final disposition of all Punch List
              items, including receipt by Buyer of "as-built" drawings.
              Notwithstanding anything to the contrary contained in the previous
              sentence, if the average time required by Seller to clear open
              Punch List items *                                        the
              amount of purchase price to which Seller shall be entitled to
              invoice Buyer for Seller installed items  under Section 5.3.2
              shall be reduced to *
              *   of the total price, and the amount of the total price to which
              buyer shall be entitled to hold back until final clearance of open
              Punch List items shall *
              For purposes of determining the average length of time required by
              Seller to clear open Punch List items, Seller shall be entitled *


5.4    EQUIPMENT EXPANSIONS. On a Network Element by Network Element basis,
       Buyer shall pay for any Equipment ordered for Expansions as provided
       below.

       5.4.1  SELLER TO INSTALL. *                                   may be
              invoiced upon completion of Installation.

       5.4.2  BALANCE. The balance of the price, including charges for
              Installation, will be

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       *                due *
    
       5.4.3  BUYER TO INSTALL. One hundred percent (100%) may be invoiced upon
              delivery to Buyer's premises.

5.5    INSTALLATION AND SOFTWARE EXPANSION. Seller shall invoice the price in
       full of all Software and Installation ordered for Expansions upon
       Acceptance.

5.6    OPERATIONS SUPPORT SYSTEM SERVICES. Seller shall invoice for Operations
       Support System Services in accordance with the terms set forth in
       Attachment A.

5.7    TECHNICAL EDUCATION. Seller shall invoice the price in full of each
       Technical Education course upon completion.  Notwithstanding anything to
       the contrary contained in the foregoing sentence, Seller shall provide
       certain Technical Education courses to Buyer *                  in
       accordance with the provisions of Section 12.24.

5.8    SYSTEM SUPPORT SERVICES. Seller's System Support Services, as described
       in Attachment D and as priced in Attachment A-1, shall be purchased in
       one-year service intervals and shall be invoiced on a month-to-month
       basis in equal amounts of one-twelfth (1/12th) of the annual price, with
       such invoicing to occur in advance of each month's performance.

5.9    ENGINEERING. If installation is not purchased from Seller, Seller shall
       invoice Base Station Configuration Engineering and Network Element
       Facilities Engineering upon completion, or monthly if applicable.

5.10   OTHER SERVICES. Seller shall invoice any Facilities Preparation Services,
       Professional Services and Site Acquisition Services upon completion, or
       monthly if applicable.

5.11   SOFTWARE AND HARDWARE STABILITY. Seller shall demonstrate the stability
       of its software and hardware as provided below.

       5.11.1  INITIAL TEST IN NEW YORK BTA. Seller shall demonstrate a period
               of service where there has been no Critical Fault in the New York
               BTA system (the "Stability Test"). The Stability Test shall
               commence when Seller shall certify to Buyer that the System is
               ready to commence stability testing, which date shall not be
               earlier than the completion of Acceptance Testing for the System.
               The Stability Test shall be completed upon the last to occur of
               the following two events:


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      5.11.2  NO PUNCH LIST PAYMENT. Until completion of the Stability Test
              described in Section 5.11.1, for the purpose of determining
              whether payment is due to Seller, completion of the Punch List for
              the New York BTA System shall be deemed not to have occurred for
              any portion of the System, notwithstanding Seller's clearance of
              the Punch List items in whole or in part.  For purposes of this
              Section 5.11.2 and 5.3.3, Seller shall be entitled to receive
              payment from Buyer on the later of *


      5.11.3  SUBSEQUENT MAJOR SOFTWARE RELEASES. Seller shall also be required
              to conduct a Stability Test as provided in Section 5.11.1 for
              every major Software release occurring subsequent to the execution
              of this Agreement.  Notwithstanding any other provision of this
              Agreement to the contrary, Seller shall not be entitled to any
              payment for the major Software release until completion of the
              Stability Test.  For purposes of this Section 5.11.3 Seller shall
              be entitled to receive payment from Buyer on the later of *


      5.11.4  AMENDMENT BY MUTUAL CONSENT  Buyer and Seller agree that this
              Section 5.11 may be modified or amended by the mutual consent of
              the parties.

ARTICLE 6   ORDERS AND SCHEDULING

6.1    SCHEDULES. Attachment H sets forth all final engineering and preparatory
       details, and the time schedule therefor, necessary for delivery and
       installation of the Initial Configuration. Buyer and Seller shall be
       responsible for the successful completion of their respective items set
       forth in Attachment F.

6.2    INITIAL CONFIGURATION. Buyer and Seller will cooperate to define the
       specific Deliverables needed for each initial Configuration to be
       supplied under this Agreement. Initial Configurations shall include BSCs
       but may or may not include MSCs. Buyer and Seller shall cooperate to
       ensure that IS-661 technology-based PCS equipment can be integrated in
       Initial Configurations, as specifically agreed by the parties on an
       initial configuration by Initial Configuration basis. Seller shall
       prepare a bill of materials, at a level of detail reasonably acceptable
       to Buyer, for each such Initial Configuration. The agreed plans shall
       include documents corresponding to separate Attachments F and H. Buyer
       and Seller shall be responsible for the timely completion of their
       responsibilities as defined in such documents.

6.3    ENGINEERING SERVICES INFORMATION. When Buyer desires to place an order
       with Seller for System Support Services or for Base Station Facilities
       Engineering, Base Station 

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       Configuration, or Network Element Facilities Engineering, Buyer shall
       submit to Seller all information in Buyer's possession or any information
       requested by Seller reasonably necessary for Seller to complete the
       order.

6.4    FACILITIES PREPARATION SERVICES, SITE ACQUISITION SERVICES AND OTHER
       SERVICES. Facility Preparation Services, Site Acquisition Services and
       other services shall be administered as provided in this Section 6.4.

       6.4.1  PROPOSAL FOR SERVICE. When Buyer desires to place an order for any
              Facilities Preparation Services, Site Acquisition Services or
              other services, Buyer shall submit to Seller all information in
              Buyer's possession or any information requested by Seller
              reasonably necessary for the furnishing by Seller of a proposal.
              Seller proposals generated for each such request shall include the
              complete purchase price of such service, including, without
              limitation, all costs of equipment, materials and supplies, labor,
              transportation and other related costs, terms of payment, and
              completion dates for such services. In the case of any such
              service performed in accordance with this Section 6.4.1, Seller
              shall be responsible for the execution, delivery, and timely
              performance of such service.

       6.4.2  REJECTION OF SELLER OFFER. If Buyer rejects a proposal for
              services submitted by Seller under Section 6.4.1 above, such
              rejection not to be unreasonable, Buyer may elect
              have such services performed *


       6.4.3  SELLER NOT RESPONSIBLE FOR BUYER-PERFORMED SERVICES. In the case
              of any services performed pursuant to clauses (i) and (ii) of
              Section 6.4.2, Seller shall have no responsibility whatsoever for
              such services, notwithstanding that such services may have been
              performed in accordance with suggestions from Seller.

       6.4.4  THIRD PARTY SUBCONTRACTOR. In the case of any services performed
              in accordance with clause (iii) of Section 6.4.2, *



                * shall have mutually agreed to such rates of markup as set
              forth in Attachment A.


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     6.4.5     OTHER SERVICES. Seller agrees that, from time to time as
               requested by Buyer, Seller shall provide Buyer with certain
               ancillary services. Seller agrees that, when such services are
               rendered by third parties, Seller shall not impose any markup on
               such third party services, except to the extent Seller adds value
               to such services and Buyer has agreed to the amount of any
               markup. Buyer and Seller acknowledge and agree that Seller takes
               no responsibility for the performance by third parties of the
               services to be rendered by such third parties under this Section
               6.4.5. Seller hereby expressly disclaims, and is absolved from
               providing, any and all warranties whatsoever on the services
               obtained from third parties and managed by Seller under this
               Section 6.4.5.

6.5  METHOD OF ACCEPTING SERVICES PROPOSALS. Proposals submitted by Seller
     pursuant to Sections 6.3 and 6.4, may be accepted by Buyer by issuance of
     Buyer's order referencing or incorporating the proposal. Orders issued
     pursuant to this Agreement shall be governed by and performed in accordance
     with the terms and conditions of this Agreement, unless the parties
     mutually agree otherwise in accordance with Article 16.

6.6  ORDERS FOR INITIAL CONFIGURATION AND EXPANSIONS. At any time during the
     term of this Agreement, Buyer may at its option direct the Seller to supply
     any part of the Deliverables pursuant to one or more purchase orders issued
     periodically by Buyer in accordance with this Agreement ("Purchase Order").
     The Purchase Orders shall be confirmed by Seller in accordance with Section
     6.7 of this Agreement. The Purchase Order shall be priced using the unit
     prices in Attachment A-1.

6.7  CONFIRMATION OF PURCHASE ORDERS. Buyer may issue Purchase Orders and
     Seller shall within *         following receipt of such confirm Purchase
     Orders provided that the Purchase Order is in accordance with the terms and
     conditions of this Agreement or amendment thereto, including the schedules
     established in Attachments H and E hereto. In the event that Buyer's
     Purchase Order falls outside these requirements, Buyer and Seller shall
     work together in good faith to solve Buyer's delivery needs. A Purchase
     Order may not change any of the terms and conditions of this Agreement or
     its schedules or attachments.

6.8  ORDERING INTERVALS AND CONFIRMATION.  The intervals for ordering
     Expansion Deliverables shall conform to those set forth in Attachment S
     hereto. The ordering interval for an Initial Configuration shall be as
     set forth in Attachment H. For systems not identified at the time of
     execution of this Agreement, the parties shall negotiate a schedule for
     ordering similar to Attachment H.

6.9  MODIFICATIONS TO PURCHASE ORDER. Buyer retains the right to modify or
     cancel, in whole or in part, any Purchase Order subject to the terms and
     conditions of Article 7 and Attachment L hereto.
                                 ------------

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ARTICLE 7   ORDER CANCELLATION AND MODIFICATION                     

Subject to the terms and conditions set forth in Attachment L hereto, and except
as provided below, *

                    In the event of a cancellation permitted hereunder, Buyer
shall pay to Seller order cancellation charges in accordance with 
Attachment L. *

        * where any of the Equipment or Software specified in such order is
subsequently re-directed to a different location of Buyer's choice and where the
re-direction delivery is accomplished *          Buyer agrees to give Seller
 *         advance notice of any such re-direction.  Seller shall use
 commercially reasonable efforts to minimize or eliminate order cancellation
 charges consistent with Attachment L.

Buyer agrees that it will not cancel a Purchase Order for the Initial
Configuration and Network Element Configuration Engineering and Installation
services, but Buyer shall have the right to modify such Purchase Orders to
reflect those normal changes that result from the practicalities of site
leasing, zoning, permitting, marketing and competitive circumstances, etc.
Seller shall be entitled to claim additional compensation from Buyer for such
modifications as provided in Attachment L.

ARTICLE 8 INSTALLATION

This Article 8 applies to Installations performed by Seller, directly by
Seller's personnel or through a third party contractor selected by Seller.

8.1  SELLER TO MEET SCHEDULES. Provided that Buyer has met all of its
     obligations under this Agreement, Seller shall install the Equipment at the
     sites to be selected by Buyer (or the sites agreed to by Buyer in the event
     that Seller has been engaged to provide Site Acquisition Services) so as to
     be ready for Acceptance Tests with regard to any Initial Configuration in
     accordance with the procedures set forth in the applicable provisions of
     Seller's then current Installation manual(s) and the time schedule set
     forth in Attachment H.


8.2  NON-INTERFERENCE. Seller shall install the System so as to cause no
     unreasonable interference with or obstruction to lands and thoroughfares or
     rights of way on or near which the Installation work may be performed.
     Seller shall exercise every reasonable safeguard to avoid damage to
     existing facilities, and if repairs or new construction are required in
     order to replace facilities damaged by Seller due to its carelessness or
     negligence, such repairs or new construction shall be at Seller's own
     expense. Seller agrees that it shall comply with any commercially
     reasonable instruction or request of Buyer respecting the Installation of
     the System so long as compliance with Buyer's instructions or requests will
     not cause Seller to violate and federal, state or local law, ordinance or
     regulation.

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8.3    INSTALLATION QUALITY. Seller's installation services shall be performed
       in a workmanlike fashion and shall comply with Seller's written
       installation guidelines.  Seller's installation services shall include
       complete testing of all equipment, and Seller shall provide Buyer with
       complete documentation of the testing procedures and protocols followed,
       as set forth in Attachment E, and the results of the testing thereof.
       Seller shall be responsible for removing all packing and shipping
       material and shall leave the premises in as clean and neat a fashion as
       it was originally found.

8.4    FIREPROOF OR FIRE RESISTANT MATERIAL. All cables, connectors, harnesses,
       strapping material and other similar equipment and supplies used in
       installing Deliverables shall comply with all federal, state and local
       laws, regulations and codes.  Where Seller has fireproof or fire
       retardent materials available in its normal stock of materials, Seller
       shall use such materials regardless of whether required by law,
       regulation or code.

8.5    SECURITY OF INSTALLATION SITE. Seller shall comply with Buyer's
       reasonable security rules. Seller shall ensure that premises are locked
       and secured from unauthorized access when Seller leaves the site. If
       Seller detects, through its normal Installation activities, a security
       risk or unauthorized access risk at a site, Seller shall promptly notify
       Buyer and cooperate with Buyer in securing the site.  Seller acknowledges
       and agrees that, with respect to Buyer's MSCs, Buyer may have stricter
       security requirements than the foregoing requirements to which Seller
       shall adhere.  Seller agrees that no unauthorized individuals will be
       permitted access to an MSC.

8.6    INSTALLATION TESTING COMPLIANCE WITH INDUSTRY STANDARDS. In addition to
       any and all post-installation of the System, Seller shall perform advance
       testing of all components contained in a system. All testing procedures
       and protocols employed by Seller shall comply with all applicable
       industry standards and shall include such tests as are normally applied
       in the industry (e.g., Swept SWR checks will be performed on all antennas
       and transmission lines installed by Seller with a System).

ARTICLE 9   ACCEPTANCE TESTING AND ACCEPTANCE

9.1    ACCEPTANCE TESTING. Set forth in Attachment J are descriptions of various
       testing procedures ("Acceptance Tests") to be conducted, and Deliverables
       related thereto (e.g., test results, inventory reports, Acceptance
       Certificates, regarding Installation of an Initial Configuration
       Equipment and Software (and, as applicable, regarding Installation of
       Equipment and Software added to an Initial Configuration to demonstrate
       that the Equipment and Software installed by Seller will operate
       substantially in accordance with the Specifications)). Attachment J
       includes procedures for testing/verifying: (i) Network Element
       Installation and operation; (ii) Network Element integration; (iii)
       traffic network verification; and (iv) overall System operation, as each
       of the foregoing may be applicable.

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9.2    ADMINISTRATION. The following procedures shall govern the administration
       of Acceptance Tests.

     9.2.1     NOTICE OF TEST. Seller shall notify Buyer as soon as it knows,
               but at least *           the date on which Acceptance Tests shall
               be conducted. At the first practicable date thereafter, each of
               Seller and Buyer shall approve in writing on any pretest forms
               provided as part of the particular Acceptance Test to be
               conducted. If Buyer or its nominee does not attend the Acceptance
               Tests, Seller shall proceed with the tests and immediately
               forward the test results to Buyer.

     9.2.2     SELLER TO CORRECT PROBLEMS. If, during the performance of
               Acceptance Tests by Seller, the Equipment, Software or the
               System, as a whole, comprising the Initial Configuration does not
               fulfill the requirements of the Acceptance Tests, Seller shall,
               at its expense, correct the defects as soon as commercially
               practicable. The Acceptance Tests (or such portion of them as
               necessary) shall be recommenced immediately after such correction
               in accordance with this Article 9.

     9.2.3     CERTIFICATION. Upon the successful completion of any Acceptance
               Tests conducted by Seller, Seller shall submit to Buyer an
               Acceptance Certificate certifying that: (i) the Acceptance Tests
               have been successfully completed, (ii) the Equipment and
               Software, to that stage completed, have been installed in
               accordance with the requirements of this Agreement, subject to
               resolution of Punch List items, and (iii) that the System (or
               System segment) is ready to be placed in Commercial Service.
               Buyer shall acknowledge same by signing the Acceptance
               Certificate prior to the System (or System segment) being placed
               in Commercial Service. At such time, Punch List items will be
               documented and the Equipment, Software or Installation covered by
               such certificate shall be deemed "Accepted," (i.e., "Acceptance"
               shall have occurred). Items may be added to the Punch List by
               Buyer *                                  Defects in components
               arising after Acceptance that are covered by Section 13.1 (c)
               shall not be considered Punch List items.

     9.2.4     DELAY OF ACCEPTANCE. Only service-affecting deficiencies arising
               out of Acceptance Testing in accordance with Attachment J, in
               conjunction with this Article 9, shall be grounds for delay of
               Acceptance of the System.

     9.2.5     COMMERCIAL SERVICE DEEMED ACCEPTANCE. Buyer's use of any part of
               the Initial Configuration Equipment in Commercial Service shall
               constitute an Acceptance of such part of the Equipment, and the
               date upon which such Commercial Service first occurs shall be the
               Acceptance date.  Seller agrees that Buyer shall be permitted to
               conduct "friendly user" pre-commercial test 





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               operations, even though Buyer may be receiving revenue from such
               "friendly users." Accordingly, Acceptance shall not be deemed to
               have occurred under this Section 9.2.5 until more than the number
               of paying customers specified in the definition of Commercial
               Service are receiving service on the System.

     9.2.6     EXPANSION ORDERS ACCEPTED ON DELIVERY. Equipment ordered for
               Expansions to the Initial Configuration shall, for purposes of
               Articles 13 and 17, be deemed to be Accepted by Buyer at time of
               delivery.

     9.2.7     PUNCH LIST CLEARANCE. The Punch List for each site shall be
               cleared on a Network Element by Network Element basis only when
               every item set forth on the Punch List, has been cleared or
               delivered to Buyer's satisfaction. The parties explicitly agree
               that, before the Punch List is considered resolved, all
               documentation and drawings required under this Agreement,
               including "as-built" drawings, regardless of whether specifically
               listed on the Punch List, must be supplied to Buyer. Upon
               resolution of Punch List items by Seller, Seller shall submit to
               Buyer, and Buyer shall sign, a certificate verifying that no
               additional Punch List items remain unresolved.  The date upon
               which Buyer signs such certificate shall be the Punch List
               Clearance Date.  With respect to the Initial Configuration, the
               items set forth on the Punch List shall be cleared on a site by
               site basis. *

ARTICLE 10  DELAY

10.1 DELAY BY SELLER.  In the event of delay by Seller, the parties shall have
     the following rights and responsibilities.

     10.1.1    LIQUIDATED DAMAGES. If, due solely to the fault or negligence of
               Seller, Installation and Acceptance of any Initial Configuration
               does not occur upon the schedule set forth in Attachment H, Buyer
               shall be entitled to, and Seller shall pay to Buyer, damages in
               accordance with this Section 10.1.

     10.1.2    COMPUTATION OF DAMAGES. The parties agree that damages for delay
               are difficult to calculate accurately and, therefore, agree to
               fix as liquidated damages, and not as a penalty, an amount
               determined according to the table below.


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               The amount of liquidated damages due and payable hereunder shall
               be calculated by multiplying the applicable liquidated damages
               percentage, for each week of delay or fraction of a week,
               determined in accordance with the table above, by the aggregate
               of (i) the total price, on a Network Element by Network Element
               basis and calculated in accordance with Attachment A, of the
               Equipment and Software, which comprise or are to comprise an
               Initial Configuration and which has not completed Acceptance
               Testing upon the date scheduled as set forth on Attachment H as a
               result of such delay ("Delayed Equipment or Software"). *

                             If any portion of the Initial Configuration has 
               passed Acceptance Testing, the liquidated damages percentage
               shall be applied against the full price of all Delayed Equipment
               and/or Software and any portion of the balance of the Initial
               Configuration that may not be used because of Seller's delay.
               Subject to Section 24.1.1, liquidated damages under this Section
               10.1 shall be Buyer's exclusive remedy for any delay by Seller in
               delivering and installing the Initial Configuration. Liquidated
               Damages shall accrue under this Agreement until such time as the
               delay period has ended, and the Liquidated Damages that may
               accrue hereunder shall be limited in amount to * 
               of cost of the aggregate Network Element associated with, and
               resulting in, such delay *






               Notwithstanding anything to the contrary contained elsewhere in
               this Section 10.1, so long as a Change in Control of either Buyer
               or Omnipoint has not occurred subsequent to the date hereof,
               Buyer acknowledges and agrees that, if the sole reason for
               Seller's delay in performance hereunder is due to either:

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                                       *

               then liquidated damages shall not accrue under this Section 10.1
               for such delay and Seller shall be excused from paying the same
               in such instance.

10.2      DELAY BY BUYER. In the event of delay caused solely by the actions of
          Buyer, the parties shall have the following rights and
          responsibilities.

          10.2.1    DATE ADJUSTMENT. A day-to-day delay in performance of
                    Seller's obligations, or a longer adjustment if Seller has
                    reassigned Installation personnel or suspended deliveries of
                    Equipment as a result of Buyer's delay; and

          10.2.2    REIMBURSEMENT OF CERTAIN EXPENSES. Buyer shall reimburse
                    Seller for: (i) any reasonable out-of-pocket expenses
                    incurred by Seller (e.g., subcontractor labor charges, extra
                    storage or delivery charges, etc.); (ii) salaries of
                    Seller's Installation personnel; and (iii) capital costs on
                    delayed Equipment resulting from Buyer's delay or the
                    resumption of work following such delay; provided, however,
                    that Seller shall use reasonable efforts to minimize such
                    expenses by working around delays caused by Buyer.
                    Notwithstanding Buyer's obligation to reimburse Seller for
                    its out-of-pocket expenses pursuant to subsection (i) above,
                    Buyer shall only pay such reasonable costs as are allowed
                    and contained in Buyer's normal guidelines, as amended from
                    time-to-time, as set forth in Attachment T, and such
                    reimbursements shall be made at Buyer's guideline or per
                    diem rates.

10.3      EXCUSABLE DELAY. In the event of a delay that is not caused solely by
          the actions of either Buyer or Seller, as applicable, the parties
          shall have the following rights and obligations.

          10.3.1     EXCUSABLE DELAYS. Neither Seller nor Buyer will be liable
                     for nonperformance, defective performance, or late
                     performance of any of their obligations hereunder, to the
                     extent and for such periods of time as such nonperformance,
                     defective performance or late performance is due to acts of
                     God, war (declared or undeclared), unforeseeable acts
                     (including failure to act) of any governmental authority
                     (de jure or de facto), riots, revolutions, fire, floods,
                     explosions, sabotage, nuclear incidents, earthquakes,
                     storms, sinkholes, epidemics, strikes, or delays of
                     suppliers or subcontractors if no equivalent source for
                     such supplies or services can

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                    reasonably be obtained for the same causes.

       10.3.2       EXCEPTIONS TO EXCUSABLE DELAYS. Seller shall not be entitled
                    to claim excusable delay under Section 10.3.1, for delays
                    resulting from strikes or other labor disturbance at any of
                    Seller's manufacturing plants.

       10.3.3       NOTICE. The party claiming the benefit of excusable delay
                    hereunder shall promptly notify the other of the
                    circumstances creating the delay and provide a statement of
                    the impact.

       10.3.4       ADJUSTMENT OF DATES. Upon the determination that an
                    excusable delay has occurred or is likely to occur, the
                    parties shall meet to determine whether it is necessary to
                    adjust the time schedule set forth in Attachment H or
                    whether it is feasible to find alternative methods to make
                    up part or all of the potential delay. The parties shall use
                    their reasonable efforts to minimize the effect of an
                    excusable delay (e.g., alternative shipping techniques,
                    different suppliers, etc.). Unless explicitly agreed by
                    Buyer, any adjustment in the time schedule set forth in
                    Attachment H shall not exceed a day-for-day extension of
                    time based upon the duration of the excusable delay.

ARTICLE 11  BUYER'S RESPONSIBILITIES

       This Article 11 defines the responsibilities of Buyer and certain
       joint Buyer and Seller responsibilities.

11.1   PERFORM ACCORDING TO SCHEDULE.

       11.1.1    Buyer's obligations as set forth in Attachment F shall be
                 performed by Buyer in a timely fashion in accordance with
                 the schedule set forth in Attachment H or, with respect to
                 items which Seller may have inadvertently omitted from
                 Attachment F on the date hereof, in a timely fashion on
                 reasonable notice received from Seller to allow Seller to
                 perform its obligations under this Agreement. Any delay by
                 Buyer shall be subject to Article 10.2 of this Agreement.

       11.1.2    Notwithstanding anything to the contrary contained elsewhere
                 in this Agreement, Seller acknowledges and agrees that Buyer
                 may from time to time make special requests of Seller for
                 purchases of equipment and services that are not in
                 accordance with the terms and conditions of this Agreement.
                 There shall be no penalty to Buyer for making such special
                 requests. Seller agrees that it shall not unreasonably
                 refuse such requests and that it shall take all reasonable
                 action necessary to accommodate such requests. The terms and

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            conditions of such special requests shall be mutually agreed upon by
            the parties immediately prior to seller's consent to such special
            requests.

11.2   Licenses and Permits. Buyer will obtain and pay the fees for operating
       licenses, and obtain approvals from the Federal Aviation Administration,
       Federal Communications Commission and state public utility commissions,
       and other required federal, state and local approvals. At Seller's
       request, Buyer shall provide Seller with evidence that such licenses or
       permits have been obtained and are in force.

11.3   Buyer-Obtained Services. Unless Seller expressly undertakes the
       responsibility therefor as set forth in Attachment F, Buyer shall
       complete (or cause subcontractors to complete) services equivalent to
       Facilities Preparation Services, Base Station Facilities Engineering,
       Base Station Configuration Engineering, Network Element Facilities
       Engineering, Site Acquisition Services, and Professional Services
       necessary for Installation of the Initial Configuration or Expansions
       thereto.

11.4   System Access. Buyer shall provide seller complete access to the System
       and acknowledges that Seller may, upon reasonable advance notice to Buyer
       and when necessary, interrupt operation of the System while conducting
       testing or correcting deficiencies.

11.5   Information. Buyer shall provide Seller all information reasonably
       requested from Buyer that Buyer has in its possession and that is
       necessary for Seller to properly install the system or as otherwise
       required by Seller to perform its obligations under this agreement.
       Seller shall deliver to Buyer all information and Documentation necessary
       for the understanding, operation and maintenance of the System.

11.6   Space and Utilities. Buyer will provide, at its own expense, (i) adequate
       work space for Installation personnel and storage space for Equipment,
       and (ii) utilities (e.g., heat, light, ventilation, electric current and
       outlets) required for Installation and testing.

11.7   Security. *
       for safeguarding the Network Element Location, Base Stations, and storage
       areas for Equipment
                                               * activities at such locations.

11.8   Buyer to Assist. Buyer agrees to reasonably assist Seller to obtain and
       maintain (i) licenses, permits or approvals for importation, re-
       exportation of the Equipment and Software on a duty and customs free
       basis, and (ii) entry or work permits or visa required for personnel
       engaged by Seller to perform work under this Agreement.

11.9   Minimum Infrastructure Commitment.  Buyer agrees to purchase from Seller
       a minimum of eighty-five million dollars ($85,000,000) (the "Minimum
       Purchase Requirement") of infrastructure Equipment, Software,
       as described in 


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       Section 11.9.1. Such eighty-five million dollar ($85,000,000) purchase
       amount shall be based upon the net of discount prices offered to Buyer
       hereunder. For purposes of determining whether the minimum purchase
       requirement obligation has been satisfied, all Equipment and related
       services, as provided in Section 11.9.1, ordered by Buyer prior to the
       fifth anniversary of the date hereof shall be deemed a "purchase,"
       regardless of whether Buyer has received such Equipment and services and
       regardless of whether Buyer continues to have payment obligations with
       respect to any Equipment and services delivered prior to such fifth
       anniversary date.

       11.9.1  Applicable Purchases. All infrastructure Equipment, Software,
               *           ordered by Buyer and delivered by Seller or to be 
               delivered by Seller shall be credited as satisfying in the
               Minimum Purchase Requirement, including Base Station subsystems,
               MSCs, BSCs, HLRs, VLRs, power equipment, OAM&P systems,
               transmission equipment, ancillary equipment, related Software and
               related Services ("Applicable Purchases"). Handset purchases,
               however, are specifically excluded from Applicable Purchases.

       11.9.2  New York MTA. Of the eighty-five million dollars ($85,000,000) 
               of Applicable Purchases to be made for use in the New York MTA,
               at least *
                                             shall relate to PCS 1900/GSM
               based equipment and services and the remaining *

                        or less shall relate to IS-661 based equipment and
               services. For purposes of the purchase commitment contained in
               this Section 11.9.2, Network Element Configurations purchased
               from Seller that are used Primarily to provide switching
               functionality for IS-661 BSCs and IS-661 BTS equipment shall not
               be considered PCS 1900/GSM based equipment.

       11.9.3  C Block BTA Licenses. Should any of Buyer's affiliates acquire 
               C-Block BTA licenses covering in aggregate at least twenty-seven
               million (27,000,000) people (beyond those in the New York MTA),
               Buyer's affiliates shall be required to make additional
               applicable purchases aggregating no less than one hundred sixty-
               five million dollars ($165,000,000), of which at least *

                      shall relate to PCS 1900/GSM based equipment and related
               services.  To the extent Buyer's Affiliates acquire C-Block BTA
               licenses but the coverage in aggregate of such licenses is less
               than twenty-seven million (27,000,000) people (beyond those in 
               the New York MTA), Buyer's Affiliates shall remain obligated to
               make additional Applicable Purchases, but the one hundred 
               sixty-five million dollar ($165,000,000) and *

                        purchase commitment levels set forth above shall be
               reduced proportionately to the actual coverage level obtained by
               Buyer's Affiliates or such purchase level commitments shall be
               reduced in such other manner as the parties agree is equitable.
               Buyer and each of Buyer's Affiliates ordering and purchasing
               Deliverables pursuant to the 


                                      27
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              terms and conditions of this Agreement shall be severally liable
              for payment of the orders and purchases made by such entity, and
              Buyer and each of Buyer's Affiliates shall not be liable or
              obligated to pay for any orders or purchases made by any other of
              Buyer's Affiliates hereunder. In connection with the several
              liability of Buyer and each of Buyer's Affiliates, any breach of
              the terms and conditions of this Agreement by Buyer or any
              individual Buyer Affiliate, as the case may be, shall not be
              deemed to be a breach of this Agreement nor attributed as a breach
              of this Agreement by the remainder of Buyer or Buyer's Affiliates,
              as the case may be, ordering and purchasing Deliverables
              hereunder. *



       11.9.4 Conditions Precedent. Buyer's purchase commitments under this
              Section 11.9 are subject to the conditions precedent as set forth
              below. Should any of these conditions precedent be initially
              satisfied but subsequently fail, Buyer's commitment requirement
              shall be adjusted as set forth herein.

              11.9.4.1  Buyer Relieved of Minimum Purchase Commitment
                        Obligation. In the event that any of the conditions
                        precedent set forth in this Section 11.9.4.1 are not
                        met, Buyer shall be relieved, in its entirety, of the
                        Minimum Purchase Commitment. The conditions precedent
                        for which Buyer shall be relieved of its Minimum
                        Purchase Commitment obligation are as follows:

                        (a) Seller fails to provide vendor financing to Buyer as
                            described in Section 12.22 hereof for any purchase
                            of Deliverables or *
                            (or group of purchases of Deliverables or
                            if a single invoice is issued by Seller) equal or
                            exceeding ten thousand dollars ($10,000) made under
                            this agreement;

                        (b) Orbitel and Omnipoint fail to sign the Orbitel
                            Handset Supply Agreement, *


              11.9.4.2  Buyer's Minimum Purchase Commitment Obligation Equitably
                        Reduced. In the event that any of the conditions
                        precedent set forth in this Section 11.9.4.2 are not
                        met, Buyer's Minimum Purchase Commitment shall be
                        equitably reduced. The conditions precedent which, if
                        not satisfied, will result in Buyer's Minimum Purchase
                        Commitment being equitably reduced are as follows:


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                     (a) *














                     (c) Seller shall not be in Material Default of this
                        Agreement or the Handset Agreement. The equitable
                        reduction of Buyer's Minimum Purchase Commitment
                        pursuant to this Section 11.9.4.2 shall be based upon
                        the magnitude and duration of Seller's Material Default
                        and the long-term effect upon Buyer's business resulting
                        from such Material default, including the cost to
                        operations and the impact on Buyer's ability to attract
                        and maintain customers.

11.10  Responsibility Matrix. Buyer shall discharge those responsibilities
       identified as those of Buyer, including Buyer's portion of
       responsibilities that are to be jointly performed by Buyer and Seller,
       set forth in the "Responsibility Matrix," Attachment F hereto. Attachment
       F contains a high-level summary of many responsibilities of the parties
       and Buyer's particular responsibilities under any item of this attachment
       shall be discharged in accordance with the particulars as may be further
       defined elsewhere in this agreement.

11.11  Pay-As-You-Grow Fees Information. Buyer agrees to provide Seller with all
       information necessary and appropriate for calculation of the Pay-As-You-
       Grow software fees referenced under Section 19.2.

11.13  Other Obligations. Buyer shall perform all other of its obligations set
       out in this agreement and any other agreement delivered in connection
       therewith.


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ARTICLE 12  Seller's Responsibilities

12.1   Licenses and Permits. Any licenses, permits or approvals required by any
       federal, state, or other governing authority relating to the manufacture,
       importation, safety or use of the equipmnet throughout the United States
       or any state shall be the sole responsibility of Seller. At Buyer's 
       request, Seller shall furnish Buyer with evidence that such licenses or
       permits have been obtained and are in force.  Any licenses, permits or
       approvals required by any federal, state or local governing authority
       relating to use of the Equipment or System in a specific locality shall
       be the sole responsibility of Buyer.

12.2   Eligibility. Seller shall be responsible for ensuring that Seller and
       Seller's subcontractors are and remain eligible under local laws to
       perform the work under this Agreement in the several jurisdictions
       involved.

12.3   CMS-40 Commitment. Seller agrees to develop and supply Base Station
       Equipment to Buyer as provided below.

       12.3.1 2 TRU Micro-RBS. Seller shall commence deliveries to Buyer of a
              two (2) TRU capable version of the micro-BTS not later than July
              1, 1997 (the "First Stage Micro-RBS"). Seller shall make available
              for sale to Buyer a minimum of fifty (50) of such first stage
              micro-RBS units per month through the end of 1997. Seller agrees
              and that it will maintain such minimum production volumes as are
              necessary to ensure sufficient supply to meet all quantities
              forecast for purchase and receipt by Buyer in accordance with the
              forecasting procedures set forth in Attachment H hereto. Provided,
              however, that, except as set forth in Attachment H, Buyer shall
              not be required to purchase any minimum volume of such equipment.

       12.3.2 Failure to Meet Delivery Dates-Substitute Equipment. Should Seller
              fail to comply with the dates and availability quantities required
              in Section 12.3.1, Seller shall furnish Buyer the most closely
              functionally equivalent base station available (such replacements
              being referred to as "Substitute Equipment"). Buyer understands
              that substitute equipment might be larger or heavier than the
              Micro-BTS and may possess additional functionalities. The price
              for the Substitute Equipment shall be the price defined in this
              agreement for the equipment originally requested by Buyer in the
              ordered configuration but unavailable from Seller. At Buyer's
              request or at Seller's option, Seller will replace Substitute
              Equipment when the originally-ordered equipment becomes available.


12.4   Interface Assistance. Subject to the terms and conditions of Section
       12.9 below, *
       provide reasonable assistance to 


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       Buyer in arranging, testing and negotiating interfaces to the PSTN.

12.5   Engineering Review. subject to the terms and conditions of Section 12.9,
       during the course of Seller's performance of its obligations hereunder,
       Seller shall review engineering and other information supplied to Seller
       by Buyer pursuant to Section 11.5, in the course of Buyer's performance
       under this agreement, including, without limitation, engineering
       parameters, site locations and frequency plans. *

                 Where, during the course of Seller performing its review of
       Buyer's information supplied pursuant to Section 11.5 Seller identifies
       an error in Buyer's information, Seller shall inform Buyer of the error
       and propose resolution of the same.

12.6   Modifications; Notice of Defects. Seller shall promptly advise Buyer of
       defects or modifications required in Network Elements or Software.
       Seller's obligation to correct defects or provide modifications is
       defined elsewhere in this Agreement.

12.7   Retrofits. Seller shall offer for sale to Buyer a retrofit package for
       any change in PCS 1900 standards subsequently enacted by the government,
       regulatory agencies, the TIA, the Electronic Industry Association
       ("EIA"), etc., on terms to be negotiated by Buyer and Seller.  With
       respect to any IS-661 based equipment developed and manufactured by
       Seller and sold to Buyer, Seller shall offer for sale to Buyer a Retrofit
       package for any change in IS-661 standards subsequently enacted by the
       government, regulatory agencies, the TIA, the EIA, etc., on terms to be
       negotiated by Buyer and Seller.

12.8   Documentation. Seller shall provide documentation to Buyer that, in 
       conjunction with Seller's training program, shall be sufficient to enable
       Buyer to operate and maintain the networks contemplated under this
       Agreement. Seller shall provide Buyer with Documentation as set forth in
       Attachment E. Seller shall also provide to Buyer provisioning
       documentation and software, to the extent available.

12.9   Consultation. Seller shall make available its experts for reasonable
       consultation with Buyer's representatives, *

                 Buyer shall not use such consultation as a substitute for
       services offered for sale by Seller to Buyer, including but not limited
       to System Support Services and Professional Services.

12.10  Special Product Software. "Special Products Software" shall include
       Software providing features requested only by Buyer, or with features
       capable of wider application but on a different time schedule than
       contemplated by Seller. Seller shall provide a reasonable price quotation
       for Special Product Software as may be requested by Buyer and, if Buyer
       accepts such quotation, develop such Special Product Software. In
       general, the terms for Special Product Software may provide an optional,
       separately-priced, exclusivity period during which the Special Product
       Software is only available to Buyer. The Seller's price quotation shall
       take into consideration the 


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       subsequent marketability of the feature to other customers of Seller.

12.11  Technical Education. seller shall provide the Technical Education courses
       and manuals for Buyer's employees as set forth in Attachment Q, including
       the Technical Education identified *                                  in
       Attachment Q.

12.12  Conformity with Law . As of the date of Conditional Acceptance thereof,
       all systems ordered hereunder shall comply with applicable FCC rules then
       in effect and with all other applicable federal, state and local laws and
       rules and regulations promulgated thereunder and with the specifications
       set forth in Attachment M, provided such systems are maintained and
       operated by Buyer in accordance with Seller's specifications.

12.13  Emergency Deliverables. In the event of an emergency, Seller shall use
       its best reasonable efforts to ship reasonable quantities of equipment
       within *
            of receipt of a written or facsimile Purchase Order from Buyer.

12.14  Safety and Legal Standards. Seller is responsible for assuring that
       proper safety measures are taken to avoid accidents and that all work
       performed is done in accordance with the relevant health and occupational
       safety laws, whether the work is performed by Seller or by Seller's
       subcontractors.

12.15  Expert Assistance. For the first initial configuration established within
       an MTA, Seller shall provide to Buyer:

            (i)  *
                                                         and

            (ii) at the prices set forth in Attachment A, for the period of time
       commencing on the completion of the Stability Period applicable to such
       Initial Configuration and for the balance of the Term, *

       such number of experts, as described below, as Buyer shall require and
       Seller can reasonably provide to Buyer.  At a minimum, Seller shall
       provide Buyer experts possessing switching and BTS expertise and
       knowledge as follows:

              (a) Switching Experts.  For each Initial Configuration with an
              MSC, MSC/OAM&P experts and BSC experts, knowledgeable in both
              hardware and Software components, and

              (b) Base Station Experts. BTS experts for each Initial
              Configuration.

       For all subsequent Initial Configurations established within an MTA,
       Seller shall provide such Switching Experts and Base Station Experts as
       Buyer shall request at the prices set forth in Attachment A.


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12.16  Right of First Refusal for Test Systems. Seller may offer, on a case-by-
       case basis as new software and other deliverables become available, Buyer
       the initial opportunity to become a beta test site, first office
       application or controlled roll-out of such Software and other
       Deliverables. Buyer shall have the right to decline any offer.

12.17  *


12.18  Attachment Completion.  Buyer and Seller agree to work together in good
       faith to complete all uncompleted Attachments to this agreement as
       detailed in Article 35 hereof upon the schedule set forth therein, or
       upon such schedule as Buyer and Seller shall mutually agree.

12.19  Cooperate with testing certain third-party BTS Equipment. Seller agrees
       to work with Buyer to test the performance of "cell enhancers" and/or
       "repeaters" provided by third parties with Seller's BTS equipment. Seller
       agrees to support the testing in a time-frame upon which Buyer and Seller
       have mutually agreed. Within forty-five (45) days after Seller has
       received Buyer's request, Buyer and Seller shall determine specific terms
       and conditions of this testing, including but not limited to: (i)specific
       products to be tested; (ii) timing of the testing; (iii) Seller's role in
       performing the tests and evaluating the test results; and (iv) the cost
       of such testing to Buyer.

       The testing described above in no way obligates Seller to modify BTS
       hardware or software (if deemed to be necessary to support such third
       partly products). If BTS hardware and/or software changes are deemed to
       be necessary, Seller shall evaluate the feasibility of making such
       changes and, if feasible, propose the same to Buyer under commercially
       reasonable terms. In addition, Buyer and Seller recognize that the
       warranty and performance sections of the Agreement (including but not
       limited to Section 9 and Attachment M) do not cover failures to perform
       in the System where such failures result from the use of third party
       products referenced here. As specific products are identified, tested,
       and integrated into Seller-provided Systems, certain portions of the
       warranty and performance sections of this Agreement (including but not
       limited to Section 9 and Attachment M) may require modification.

12.20  Upgraded and New MSC or BSC Platform. Buyer and Seller acknowledge that
       Seller may introduce a new MSC or BSC Platform (i.e., an updated
       replacement for Seller's AXE-10-based equipment) during the Term.  Seller
       and Buyer will work together to maximize the value of Buyer's investment
       in PCS 1900 and IS-661 technology.  In connection therewith, Seller
       acknowledges and agrees that the following principles will govern its
       business and technical decision making processes throughout the term of
       Buyer's and Seller's business relationship:


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       12.20.1  The platform provided by Seller to Buyer will be capable of
                supporting all the services set forth in Attachment M.

       12.20.2  Seller shall continue to support Equipment and associated
                Software components of PCS 1900 products as set forth in
                Articles 14 and 15, so long as Buyer implements software updates
                and basic releases as they become commercially available. This
                support shall include documentation, utilization of engineering
                and planning tools, installation and growth procedures,
                training, availability of replacement, growth and repair
                material, availability of spares as well as technical support.
                The discontinuance or significant reduction of support as
                described above shall carry the presumption of functional
                obsolescence. Should seller decide to offer new products and
                discontinue the manufacturing of existing products, Seller will
                provide buyer the opportunity to place a last order for existing
                products. Additionally, Seller warrants that any new products
                will be backwards compatible with the prior two generations of
                discontinued products.

       12.20.3  In the event the PCS 1900 platform becomes functionally
                obsolete, as described above, Seller shall provide incentives,
                such as purchase credits, to Buyer (with appropriate
                consideration for the competitive environment and the in-service
                life of existing equipment) for Buyer to acquire such
                replacement architecture from Seller. Buyer and Seller shall
                jointly agree upon and determine the amount of credits to be
                provided. As a guideline, the value of these credits should be
                approximately equivalent to the full replacement costs initially
                and reduced to zero (0) at the end of the discontinued product's
                normally depreciated useful life. Should Buyer and Seller be
                unable to reach agreement on the amount of credits due Buyer,
                the issue shall be resolved pursuant to the arbitration process
                contained in Article 23.

       12.20.4  *





12.21  Updated Codec. All BTS equipment delivered shall be equipped with dual-
       mode CODECS, capable of supporting both the GSM/PCS standard 13 kb/s
       VOCODER and the enhanced full-rate VOCODER. Seller's equipment shall be
       designed to permit modular upgrading to include half-rate speech coding,
       should Buyer so desire. The parties acknowledge that the TRAUs identified
       and priced in Attachment A are 


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       equipped with the enhanced full-rate VOCODER described herein.

12.22  Seller Financing. *



 


 


               * Notwithstanding anything to the contrary contained in the
       immediately preceding sentence, Buyer's obligations with respect to (i)
       paying Seller for Deliverables already received by Buyer or ordered by
       Buyer that are to be received and accepted by Buyer, at Buyer's option;
       (ii) warranty claims made pursuant to Article 13; and (iii) all
       obligations imposed on Buyer as set forth in Article 19 hereof shall
       continue until the amounts owed under clause (i) are paid in full and for
       the duration of any warranty period under which Buyer may make claims.

12.23  Seller Advertising, Marketing and Promotion.  Seller agrees that, to help
       ensure the success of Buyer's network, Seller shall employ, *
       the advertising, marketing and promotional campaigns that it has
       traditionally undertaken with operators of other PCS and cellular 
       systems.  Such campaigns shall include, but not be limited to, placement
       of print advertisement with various newspapers printed and widely
       distributed in the New York MTA.

12.24  Technical Education Courses.  Seller agrees and acknowledges that, in
       addition to the Technical Education courses Buyer shall purchase from
       Seller pursuant to Section 5.7, Seller shall provide the certain
       Technical Education courses *

              in accordance with the following criteria:

              (a) *
              Buyer shall be able to send *
                        to (i) Seller's CMS 40 AXE 10 Operation and Maintenance
              course (15 days) and (ii) Seller's CMS 40 MSC Operation and
              Maintenance course (5 days); and

              (b)  for *

                      * as the case may be) personnel to Seller's RBS 2000
              Operation and Maintenance Course (5 days).


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12.25  *



12.26  Handset Bundling with Infrastructure Purchases.  Seller acknowledges and
       agrees that, at any time during the term, Buyer may request to bundle
       Equipment and Software purchases with Handset purchases.  Seller shall
       sell and deliver such quantity or quantities of bundled Equipment,
       Software and Handsets at a bundled price that is based upon the Equipment
       and Software prices that are then in effect under this Agreement and
       based on the Handset prices that are then in effect under the Handset
       Agreement.

Article 13  Warranties

13.1   General. In addition to any other warranties contained elsewhere in
       this Agreement, the following warranties shall be applicable to
       deliverables supplied pursuant to this Agreement.

13.2   Equipment and Installation Services. Equipment and Installation Services
       are warranted as provided in this section 13.2

       13.2.1  Duration and Duty to Repair or Replace. Seller warrants that, for
               a *

                        (the "Warranty Period"), Equipment and the Installation
              thereof shall materially conform with and perform the functions
              set forth in the Specifications and shall be free from defects in
              material or workmanship that impair: (i) service to subscribers,
              (ii) System performance, (iii) billing, (iv) administration, or
              (v) maintenance. If notified by Buyer of any such defects in
              material or workmanship or nonconformity with Specifications
              within the Warranty Period, Seller shall, at its election and
              expense, repair or replace any such defective Equipment or
              Installation. Such repair or replacement includes material, labor
              and services, and shall be Buyer's sole remedy and Seller's sole
              obligation in the event this warranty is breached. Any Equipment
              repaired or replaced under this Section 13.1 shall be subject to
              the original Warranty Period, or *                    whichever is
              longer.  In the event the repair of Equipment results in an
              extension of the original warranty period pursuant to the
              immediately preceding sentence, Buyer agrees to monitor such
              extension period and inform Seller that such repaired equipment
              continues to be subject to the warranty provisions of this
              Agreement, if a subsequent repair is to be performed during such
              extended warranty period.  Notwithstanding anything to the
              contrary contained in the Equipment


                                      36 
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              warranty provision set forth above, Buyer acknowledges and agrees
              that the length of warranty period Seller shall provide Buyer for
              equipment that Seller originally purchases from Buyer or one of
              Buyer's Affiliates shall only be of the same period duration as
              that provided offered by Buyer or Buyer's Affiliate to Seller.

       13.2.2 Notice of Claim. If Buyer claims a breach of warranty under this
              Section 13.1, it shall notify Seller promptly of the claimed
              breach. Buyer will allow Seller to inspect the Equipment or
              Software at Buyer's location, or, upon Seller's request, return
              the equipment to Seller's U.S. repair facility.

       13.2.3 Circuit Boards. During the Warranty Period, electronic circuit
              board components will be repaired or replaced, with Buyer
              responsible for normal "first echelon" fault isolation (except to
              the extent that Buyer could not have reasonably been expected to
              isolate such fault without the assistance of Seller), removal of
              defective boards and replacement from spare stock (except to the
              extent that such removal and replacement requires the specialized
              expertise of Seller), and packing and shipping to Seller's U.S.
              repair facility. Buyer will maintain a stock of spare board
              assemblies as recommended by Seller for this purpose. The parties
              will review Seller's recommended spares level periodically to
              ensure that Buyer is not maintaining excessive spares holdings. In
              the event that Buyer experiences board assembly failures that
              materially exceed the number and frequency of such failures
              contemplated by the spare board assembly stock recommended by
              Seller, at the request of Buyer, Seller shall supply to Buyer
              additional spare board assemblies of each type so depleted, as
              necessary to maintain an adequate emergency replacement stock,
              without charge to buyer, until implementation of a permanent
              remedy.  Upon implementation of such remedy, all excess boards
              supplied under this Section shall be returned to Seller.

       13.2.4 Freight.  Buyer agrees that the freight charges incurred to send
              equipment from Buyer's point of origin to Seller's U.S. repair
              facility shall be borne by Buyer.  Seller agrees that freight
              charges incurred to send repaired equipment from Seller's U.S.
              repair facility to Nuyer's point of origin in connection with
              Seller's obligations under this Section 13.2 shall be borne by
              Seller, unless the equipment returned is not defective or
              otherwise not covered by Seller's limited warranty, in which case
              Buyer shall pay for all freight charges between Buyer's point of
              origin and Seller's U.S. repair facility. Where circuit boards are
              returned to Seller by air express service, Seller shall ship the
              repaired or replacement circuit board by air express service.


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13.3   Software Warranty.

       13.3.1 General Warranty. Seller warrants that during the Warranty Period,
              the Software, Software Updates, Software Enhancements and Software
              Features shall materially conform with and perform the functions
              set forth in the specifications, and shall be free from defects in
              material and workmanship which impair service to subscribers,
              System performance, billing, administration or maintenance. If,
              during the warranty period, Seller is notified that the software
              is defective or fails to so perform, Seller shall correct such
              defects or failure and ensure that the software, software updates,
              Software Enhancements and Software Features conform with, and
              perform the functions set forth in, the specifications. Seller's
              obligation under this warranty is limited to correction of any
              Software, Software Update, Software Enhancement or Software
              Feature failures and Seller's performance thereof shall be Buyer's
              sole remedy in the event this warranty is breached.

       13.3.2 *




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                                       *








13.4   Time for Remedy-Normal. Seller will return to buyer the repaired or
       replaced equipment or provide the remedy for the defect in software or
       installation within *                                   working days from
       the date Buyer makes a request for service under this warranty to
       Equipment, Software or Installation not materially impairing service with
       respect to subscribers, System performance, billing, administration or
       maintenance.

13.5   Time for Remedy-Service Affecting. Seller agrees to commence work on all
       Equipment, Software or Installation defects materially impairing service
       to subscribers, System performance, billing, administration or
       maintenance as soon as practicable, but in no event later than twenty-
       four (24) hours after notification of such defect, and will cure such
       defect as promptly as practicable.

13.6   Exclusions to Warranty. Seller's limited warranty under this Article 13
       shall not apply to:

       13.6.1  Buyer's Negligence. Damage or defects caused by Buyer's
               negligence, including, but not limited to:

              13.6.1.1  Exposure of Equipment or Software by Buyer to
                        environmental conditions other than set forth in
                        Attachment G and Attachment M, or use by Buyer other
                        than in accordance with written instructions furnished
                        by Seller;

              13.6.1.2  Modification by Buyer of Equipment or Software without
                        Seller's written consent;


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                                                                CONFIDENTIAL
                                           
                                                

              13.6.1.3  Interaction with the System caused by Buyer of equipment
                        or software not purchased under this Agreement, unless
                        Seller expressly consents in writing to such; or

              13.6.1.4  Operation or Servicing of the System by Buyer's
                        personnel or contractors who have not received Technical
                        Education from seller commensurate with the operational
                        or servicing tasks performed by such personnel.

       13.6.2 Certain Damage. Any Equipment or Software damaged by accident or
              disaster, including without limitation, fire, flood, wind, water,
              lightning or power failure; or

       13.6.3 Consumable Supplies. Fuses, lamps and soft magnetic storage media
              are excluded from Seller's limited warranty under this Article 13,
              but Seller warrants all such items shall be free from defects for
              a period of ninety (90) days following the punch list clearance
              date.

13.7   Non-Warranty Expenses. Buyer shall reimburse Seller for Seller's
       reasonable out-of-pocket expenses incurred, at Buyer's request, in
       responding to and/or remedying Equipment, Software, or Service
       deficiencies not covered by the warranties set forth herein or by the
       obligations established under an agreement for System Support Services
       between Seller and Buyer. Upon request by either party, if it appears
       that Buyer is regularly purchasing non-warranty repair services, Buyer
       and seller shall negotiate, in good faith, the means to minimize Buyer's
       costs in so doing (e.g., Seller's establishment of local repair centers,
       flat-rate repair instead of time-and-materials, etc.).

13.8   Third Party Goods and Services. If Seller purchases or subcontracts for
       the manufacture of any part of the System or the performance of any of
       the services to be provided hereunder from a third party, the warranties
       given to Seller by such third party shall inure, to the extent applicable
       or permitted, to the benefit of Buyer, and Buyer shall have the right to
       enforce such warranties directly or through Seller. The warranties of
       such third parties shall not be in lieu of any warranties given by Seller
       under this agreement.

13.9   MSC Call Capacity Warranty

       13.9.1  Warranties Defined. Seller warrants the call processing capacity
               of its MSC and BSC Network Elements as defined below. In the
               event of a breach in this warranty, Seller shall furnish
               additional equipment necessary as contemplated at Section 13.11

       13.9.2  Call Model and statistics. Buyer understands that the precise
               call   


                                      40

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              processing capacity of MSC and BSC Network Elements is
              influenced by the nature of the call statistics in the System.
              Seller's initial Call Capacity Warranty is based, in the absence
              of actual information upon subscriber behavior, upon certain
              assumptions in a "call model." In addition, the call processing
              capacities are defined for a certain set of system Features. Buyer
              acknowledges and agrees that to ascertain whether Seller is in
              breach of its Call Capacity Warranty, the scope of the Call
              Capacity Warranty will be recalculated, based upon a new "call
              model" reflecting the actual subscriber behavior observed in the
              System and upon those Features implemented in the System. The call
              model and Features used in defining the initial Call Capacity
              Warranty are set forth in Attachment M.
                                        ------------

       13.9.3 Adjusting Warranty. The call processing capacities set forth in
              Attachment M shall be adjusted as reasonably necessary to reflect
              (a) changes in the values specified in the call model to reflect
              actual subscriber behavior and (b) degradation, if any, associated
              with features introduced after the date of this agreement. The
              algorithm Seller uses to develop the warranted call processing
              capacities, and how the results should be adjusted to reflect
              actual subscriber behavior, is set forth in Attachment M.

              The impact on call capacity of Features introduced after the date
              hereof will be evaluated on a case by case basis. Seller may not
              change this algorithm during the term of this warranty except to
              supplement it as necessary to reflect new or modified hardware,
              Network Elements or Features. Any disputes concerning these
              adjustments or application of the algorithm or the warranty shall
              be resolved by the Third-Party Engineer.

       13.9.4 Remedies. In the event Seller breaches the warranty established
              in this Section 13.9, Seller shall use its best efforts to
              diagnose and correct the breach upon a schedule satisfactory to
              buyer in its reasonable discretion, without charge to Buyer.
              Should additional or modified deliverables be necessary to correct
              the breach, Seller shall provide the deliverables without charge,
              as contemplated in Section 13.11. The remedies provided under this
              Section 13.9 shall be without prejudice to Buyer's claims for
              remedies under other provisions of this agreement *

       13.9.5 Warranty Term. This call capacity warranty shall be in effect
              for the term and for any renewal or extension period subsequent to
              the term.

       13.10  Performance of System and Deliverables. The Seller expressly
              warrants as provided in this Section 13.10 with respect to the
              performance of the deliverables. In the event of a breach in this
              warranty, Seller shall furnish additional equipment necessary as
              contemplated at Section 13.11.


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       13.10.1  Dependability Performance. The dependability performance
                specifications set forth in Attachment M shall be binding upon
                all deliverables supplied by Seller. Without limiting any other
                remedy of Buyer, if any equipment fails to operate in material
                accordance with this criterion, seller, at its sole cost, shall
                immediately take all reasonable measures necessary to resolve
                the problem. In determining whether Seller is in compliance with
                this section 13.10.1, the travel time of maintenance forces
                shall be excluded. seller's dependability performance values
                assume that the repairing technician has completed the relevant
                courses offered by Seller and is equipped with Seller's
                recommended spare parts, test equipment and tools. An equitable
                adjustment shall be made in Buyer's measured Dependability
                Performance figures should these assumptions fail to be correct
                for Buyer's maintenance forces.

       13.10.2  TRU Dependability Performance. In the case of TRU modules, in
                addition to the remedy provided at Section 13.10.1, Buyer shall
                also be compensated *
                                                        The compensation shall
                include the *


                        In the event of a claim under this Section 13.10.2,
                Buyer and Seller shall, in good faith, negotiate the most cost-
                efficient method of compensating Buyer, while still maintaining
                Buyer's commercially reasonable network maintenance standards.
                The method of compensation may include but is not limited to:
                *

                                      





       13.10.3  Dropped Calls.  Seller warrants that, *
                        the System target performance shall be a dropped call
                rate, regardless of the cause thereof, not to exceed *

                        Seller and Buyer agree that if the System is not
                performing in accordance with expectations or at the designated
                performance levels, Buyer and Seller shall investigate jointly
                the cause of such substandard performance. If Buyer and Seller
                determine that such substandard performance is the fault of
                Seller, then Seller shall take corrective action in accordance
                with the terms of Seller's warranty provided herein. In
                determining the cause of the System's substandard performance,
                the following items shall be given consideration:

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                                    *      











               In cases where multiple vendors are involved in Buyer's network,
               Seller's liabilities under this Section 13.10.3 shall be only
               with respect to Seller's portion of the network. Claims of
               inadequate processor power are excluded from this Section 13.10.3
               and instead are warranted under Section 13.9. System downtime and
               System restarts are also excluded from this Section 13.10.3
               warranty.

       13.10.4 Seller to Act. Without limiting any other remedy of Buyer, if
               the systems fails to operate in accordance with the criteria set
               forth in Sections 13.10.2 and 13.10.3 above, Seller, *
               shall immediately take all reasonable measures neceesary to
               resolve the program.


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       13.10.5 Promised Performance Specifications. The Seller warrants that the
               Deliverables shall provide the capacity and functionality as set
               forth in Attachment M provided, however, that Seller is not
               responsible for under-specifying the equipment needed where the
               under-specification results from Buyer's provision of incorrect
               data to Seller. Buyer's remedy for a breach of this Section
               13.10.5 shall be as provided in Section 13.11.

       13.10.6 Compliance with PCS 1900 or IS-661 specifications. upon
               acceptance of any equipment delivered hereunder, *

                        Seller represents and warrants that the System will
               function in accordance with the then-current PCS 1900 (or IS-661,
               as appropriate) standards in effect at the time of such
               Acceptance, as implemented under Seller's Software schedule set
               forth in Attachment M and with such exceptions or partial
               compliance as defined in Seller's compliance statement as set
               forth in Attachment M. If such performance is not maintained,
               Seller shall promptly replace or repair any non-performing item,
               without cost to Buyer.

13.11  Additional Products and Services Remedy. Seller has made certain
       capacity and performance warranties in Article 13 and elsewhere in this
       Agreement. In the event of a breach of such warranties, Seller shall, at
       no additional cost to Buyer, provide such additional Deliverables as are
       required to remedy the shortfall.  The additional Deliverables identified
       in this Section 13.11 shall include, but not be limited to, replacement
       Deliverables, upgrades, and retrofits. in the event that one or more new
       sites are reasonably required to correct the shortfall, Seller shall
       provide all Deliverables for the new site(s). Buyer shall be responsible
       for site acquisition and site preparation costs and Seller shall pay all
       costs for moving, Installation and Optimization of the Deliverables
       related to such sites. If, in the future, Deliverables can be enhanced to
       meet the warranted capacity or functionality, and Seller provides such
       enhancements to Buyer, Buyer shall, at Buyer's option, either return or
       purchase, for an agreed upon price, those Deliverables that were provided
       earlier to remedy a breach of warranty. The remedies provided under this
       Section 13.11 shall be without prejudice to Buyer's claims under any
       other provision of this Agreement.

13.12  Link Budget. Seller warrants the equipment link budget set forth in
       Attachment M. in the event that the link budget is not met in practice,
       Seller shall furnish additional equipment necessary as contemplated in
       Section 13.11.

13.13  Critical Fault Warranty. Seller warrants that the Deliverables will not
       experience Critical Faults Beyond those permitted in this Section 13.13.

       13.13.1  Critical Fault Defined. "Critical Fault" is defined as an
                unplanned outage meeting the criteria defined below that


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              *  
              For purposes of calculating the number of BTS sites, *
                        The "Utilized Capacity" for a particular period is the
              measurement of the *
 
                            At certain times of day, the capacity of the System,
              even if it is experiencing a reduction or outage, will still be
              greater than the Utilized Capacity for such period.  In such case,
              no Critical Fault shall have occurred.


              *   
              For Systems with multiple MSCs, the Critical Fault warranty shall
              be determined on an MSC-by-MSC basis.

              Events or activities outside of or beyond Seller's control,
              including but not limited to power failures, failure of network
              facilities, or Network Elements that are not deployed in a fully
              redundant configuration, where such configuration is offered by
              Seller, shall not be deemed to be a Critical Fault.

     13.13.2  WARRANTY DEFINED. Seller warrants that, during the warranty
              term set forth in subsection 13.14.3, each system shall not
              experience a Critical Fault

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     13.13.3  WARRANTY TERM. The warranty term shall commence upon
              Conditional Acceptance of each Initial Configuration and shall end
              three (3) years later.

     13.13.4  REMEDY-ON SITE ASSISTANCE. Seller shall immediately, but no
              later than *                        after Buyer has made a request
              for on-site assistance to remedy  a Critical Fault, (if such
              Critical Fault has not previously been remedied) dispatch
              appropriate technical personnel to provide on-site assistance on *
                                        
              until such Critical Fault is remedied. This assistance, *
 
              provided, however, Seller reserves the right *

                        if the Critical Fault is not caused by failure of
              Deliverables to perform as warranted hereunder. The remedy defined
              in this Section 13.13.4 shall be without prejudice to any other
              remedy available to Buyer.

     13.13.5  REMEDY-LIQUIDATED DAMAGES. On a non-cumulative basis:

              *

              In no event shall the aggregate of the damages payable pursuant to
              this sub-section 13.13.5 exceed *

     13.13.6  SERVICE AFFECTING FAULTS.  A Service Affecting Fault is defined
              as a single unplanned outage meeting the criteria below that
              exceeds *
              in duration.

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              *
              During the warranty period set forth in Section 13.13.3, should
              Buyer experience a Service Affecting Fault, Seller shall, within
              twenty-four (24) hours after a Service Affecting Fault, if not
              previously remedied, dispatch appropriate technical personnel to
              provide on-site assistance on a seven (7) days-a-week, twenty-four
              (24) hours-a-day basis until such Service Affecting Fault is
              remedied.  This assistance, *


                        if the Service Affecting Fault is not caused by failure
              of Deliverables to perform as warranted hereunder.  The remedy
              defined in this Section 13.13.6 shall be without prejudice to any
              other remedy available to Buyer.

     13.13.7  EXCEPTIONS TO CRITICAL FAULT WARRANTY. Seller shall not be
              liable for a breach of the Critical Fault Warranty where the
              breach is Primarily due to actions of Buyer in operating or
              maintaining the System provided that Buyer's actions are
              inconsistent with Seller's explicit instructions as provided in
              the Documentation. Seller is also not responsible for Critical
              Fault or Service Affecting Fault warranties where the outage is
              caused by the actions of a third party, where the third party is
              not under the control of Seller. Excluded from the time
              calculation shall be the travel time of Buyer's maintenance forces
              where travel is necessary to reach a defective Network Element.
              Where a breach is due to errors jointly attributable to Buyer and
              Seller, any liquidated damages due to Buyer shall be pro-rated
              according to the degree of responsibility borne by the parties.
              The Third-Party Engineer shall assess the responsibility for fault
              and the relative percentages of responsibility should this be in
              dispute.

13.14  LIMITATION ON WARRANTIES. THE LIMITED WARRANTIES IN THIS ARTICLE 13
       CONSTITUTE THE ONLY WARRANTIES OF SELLER WITH RESPECT TO THE EQUIPMENT OR
       SOFTWARE, AND ARE IN LIEU OF ALL OTHER WARRANTIES, WRITTEN OR ORAL,
       STATUTORY, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY
       WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. NO
       WARRANTIES ARE MADE BY SELLER ON BEHALF OF ANY OTHER PARTY THAT MAY HAVE
       INDEPENDENTLY SUPPLIED ANY PART OF THE SYSTEM TO BUYER. SELLER'S WARRANTY
       OBLIGATIONS UNDER THIS ARTICLE 13 SHALL NOT BE ENLARGED, DIMINISHED OR
       AFFECTED BY, AND NO WARRANTY OBLIGATION OR LIABILITY SHALL ARISE FROM

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       SELLER'S PERFORMANCE OF SYSTEM SUPPORT, SYSTEM SUPPORT SERVICES OR
       PROFESSIONAL SERVICES OR OTHER ADVICE OR SERVICE MADE IN CONNECTION WITH
       THE SYSTEM.

ARTICLE 14     SYSTEM SUPPORT SERVICES

Seller agrees to make the System Support Services available to Buyer as
substantially set forth in Attachment D.

ARTICLE 15     CONTINUITY OF EXPANSION FUNCTIONALITY

Through December 31, 2010, Seller shall make available for sale to Buyer,
Equipment and Software to enable Buyer to expand the System.  Such Equipment and
Software will provide equivalent functionality for and shall be compatible with
the System.  Following the term of this Agreement, the prices for such Equipment
and Software shall be Seller's list prices or such price as Buyer and Seller may
then negotiate.

ARTICLE 16     AMENDMENTS

The terms and conditions of this Agreement, including the provisions of the
Attachments, may be amended by mutually agreed contract amendments. Each
amendment shall be in writing and shall identify the provisions to be changed
and the changes to be made. Contract amendments shall be signed by duly
authorized representatives of Seller and Buyer. Any acknowledgment form or other
document of Seller or Buyer containing terms and conditions of sale or purchase
shall not have the effect of modifying the terms and conditions of this
Agreement, and all Deliveries and Installation of goods and performance of
services by Seller shall be deemed to be only upon the terms and conditions of
this Agreement, unless modified terms are specifically agreed to in writing and
signed by an authorized representative of each party.

ARTICLE 17     TITLE AND RISK OF LOSS

17.1   TITLE. Title to each item of Equipment shall pass to Buyer upon
       Acceptance. Prior to acquiring title to the Equipment, *


17.2   RISK OF LOSS. Risk of loss to each item of Equipment shall pass to Buyer
       upon Acceptance; provided, however, that Buyer shall assume the risk of
       loss prior to Acceptance for any Equipment (i) damaged by causes that
       could have been prevented by the use of safety devices recommended by
       Seller but declined by Buyer, (ii)

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       damaged or stolen when such could have been prevented by security
       measures pursuant to Buyer's responsibilities under Article 11, or (iii)
       damaged by the failure of Buyer to provide and maintain the environmental
       conditions set forth in Attachment G.

ARTICLE 18     INSURANCE

18.1   SELLER TO MAINTAIN. Seller shall maintain and keep in force all risk
       insurance, in form and substance and with insurers reasonably
       satisfactory to Buyer, covering all Equipment delivered to Buyer the risk
       of loss to which has not passed to Buyer, and shall furnish Buyer with
       proof that such insurance has been obtained and is in force.

18.2   BUYER TO MAINTAIN. Upon risk of loss passing to Buyer, Buyer shall
       maintain and keep in force all risk insurance, in form and substance and
       with insurers reasonably satisfactory to Seller, covering all Equipment
       delivered to Buyer the title to which has not passed to Buyer, and shall
       furnish Seller with proof that such insurance has been obtained and is in
       force.

18.3   LEVEL OF INSURANCE. Seller shall at all times while performing services
       on Buyer's premises carry insurance with limits not less than the limits
       described as follows:

       18.3.1     Employer's General Liability - Limits $1,000,000.

       18.3.2     Comprehensive General Public Liability: $1,000,000 single
                  limit bodily injury and property damage combined; such
                  coverage shall include a broad form liability rider, completed
                  operations coverage rider and contractual liability rider.

       18.3.3     An umbrella policy with $1,000,000 single limit bodily injury
                  and property damage combined.

       18.3.4     Workmen's Compensation shall be maintained at least at the
                  level required by statute in the states in which seller is to
                  perform work under this Agreement.

18.4   CERTIFICATES OF INSURANCE. Each party shall provide, when requested to do
       so by the other party, certificates of insurance (i) evidencing the
       insurance to be carried under this Article 18, naming the other party as
       an additional insured and (ii) including provisions that such insurance
       policy shall not be subject to cancellation, expiration or reduction
       without thirty (30) days written notice to the other party.

18.5   NO WAIVER. Notwithstanding the requirements as to the type and coverage
       levels of insurance to be carried by each party, the insolvency,
       bankruptcy or failure of any

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      insurance company carrying insurance for either party, or failure of any
      such insurance company to pay claims accruing, shall not be held to waive
      any of the provisions of this agreement or relieve either party from any
      obligations under this agreement.

ARTICLE 19     SOFTWARE; CONFIDENTIAL INFORMATION

19.1   SOFTWARE LICENSE. Subject to the limitations of this Agreement and
       payment in full of the applicable license fee(s), Seller grants Buyer a
       non-exclusive, nontransferable license to use Software (including
       Software Updates, Software Enhancements and Software Features) delivered
       to Buyer under this Agreement solely in conjunction with the operation of
       the System. Any other intended use of the Software not specifically
       authorized herein shall be subject to a separate licensing arrangement
       between Seller and Buyer.

19.2   PAY-AS-YOU-GROW. Software required for operation of the Equipment,
       Software Features and other optional Software are licensed on a "pay-as-
       you-grow basis." Pay-as-you-grow fees are calculated in accordance with
       the terms set forth in Attachment A. Buyer's right to continued use of
       Software licensed on a pay-as-you-grow basis will be contingent *

              The term of the license granted for each module of Software
       delivered under this Agreement shall be specified in the order for the
       Software. Payments under this Section 19.2 shall be subject to the
       conditions precedent contained in Section 5.2.

19.3   OWNERSHIP OF SOFTWARE. Buyer acknowledges that the Software is the
       property and confidential proprietary information of Seller, Seller's
       suppliers, or third party licensors, title and ownership rights to
       Software, including any reproductions, modifications or derivatives
       thereof, shall remain at all times with Seller, Seller's suppliers, or
       third party licensors, as applicable. Buyer may not sell, assign,
       transfer, sublicense, or otherwise make available the Software to any
       third party (except as provided herein) without the consent of the owner
       of the Software, nor shall Buyer adapt or create any derivative work
       using Software or decompile or reverse engineer the Software, without the
       prior written consent of Seller. In no event may Buyer sell, assign,
       transfer, license, or otherwise make available any of the Software to any
       person not purchasing the System, without the consent of the owner of the
       Software. Buyer may not copy or duplicate the Software, except that Buyer
       may make one (1) copy of the Software solely for back-up or archival
       purposes, provided that such copy bears such copyright or other
       proprietary notices as are contained on the original copy (or as Seller
       may reasonably require from time to time). Buyer shall not alter or
       remove any copyright or other proprietary notices on or in copies of the
       Software. Except as expressly permitted in this Article 19, Buyer agrees
       not to disclose or cause to be disclosed the Software to any person other
       than employees or contractors of Buyer duly authorized to use the
       Software on Buyer's behalf and who have been informed by

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       Buyer of the use and disclosure restrictions set forth herein.

19.4   HARDWARE LIMITATION. The Software supplied under this Agreement shall
       not, without the prior written consent of the Seller, or the owner of the
       Software if different from the Seller, be implemented on or used to
       directly control hardware other than that purchased under this Agreement.

19.5   SOFTWARE TRANSFER. Buyer may transfer this Software license to any
       subsequent purchasers of the System from Buyer without further approval
       of Seller provided the subsequent purchasers are not direct competitors
       of Seller and further provided the subsequent purchasers agree in a
       writing delivered to Seller to assume Buyer's obligations set forth in
       this Agreement relating to the Software.

19.6   SOFTWARE ENHANCEMENTS AND FEATURES. Software Enhancements or Software
       Features may be ordered by Buyer at the prices set forth in Attachment A,
       and if not therein set forth, at Seller's then current prices therefor.
       Software Updates shall be provided to Buyer without charge during the
       Warranty Period.  Thereafter, Software Updates shall be made available to
       Buyer pursuant to agreements for System Support Services.

19.7   CONFIDENTIALITY. The parties agree, except as may be required to comply
       with any applicable law, regulation or order of any governmental or other
       authority, to:

       19.7.1  maintain, or cause to be maintained, the confidentiality of
               Confidential Matters of the other party and not disclose, or
               permit to be disclosed, any such Confidential Matters, unless
               authorized in writing by such other party;

       19.7.2  not use, or permit to be used, any such Confidential Matters,
               except in accordance with the scope of this Agreement;

       19.7.3  restrict, or cause to be restricted, disclosure of such
               Confidential Matters to those officers, employees and agents who
               need to know such Confidential Matters in the performance of work
               relating to the subject matter of this Agreement (it being
               understood that such officers, employees and agents shall be
               informed of the confidential nature of such Confidential Matters
               and shall be directed to treat such Confidential Matters
               confidentially and not use such Confidential Matters other than
               for the purpose described above); and

       19.7.4  take precautions necessary or appropriate to guard the
               confidentiality of such Confidential Matters.

19.8   DISCLOSURE UNDER ORDER. In the event that any party hereto becomes
       obligated to disclose Confidential Matters pursuant to an order of any
       governmental or other authority, such party shall seek a protective order
       or other appropriate remedy that will

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       permit such party to avoid such disclosure. In the event that such
       protective order or other remedy is not obtained, such party will
       disclose only that portion of the Confidential Matters as it is obligated
       to disclose pursuant to such order, and will use all reasonable efforts
       to obtain assurances that confidential treatment will be accorded to any
       Confidential Matters so disclosed.

19.9   INJUNCTIVE RELIEF. Notwithstanding the provisions of Article 23 of this
       Agreement, the parties agree that Buyer or Seller may enforce provisions
       of this Article 19 by an action for injunctive relief or other equitable
       remedies.

19.10  NO IMPLIED LICENSE GRANT. Except as expressly provided herein, nothing
       contained in this Agreement shall be construed or deemed to grant, either
       directly or indirectly or by implication, any license under any existing
       or future intellectual property rights of Seller.

ARTICLE 20        TAXES

20.1   SALES AND USE TAX COLLECTION BY SELLER. The amounts to be paid by Buyer
       under this Agreement do not include any state or local sales, use, excise
       or personal property taxes, however designated, that may be levied or
       assessed on Deliverables, including, but not limited to, services.  With
       respect to such taxes, Buyer shall either furnish Seller with an
       appropriate exemption certificate applicable thereto or pay to Seller,
       upon presentation of invoices therefor, such amounts thereof as Seller
       may by law be required to collect or pay. Where Buyer able, Buyer intends
       to obtain a direct pay certificates enabling Buyer to pay all sales and
       use taxes directly to the applicable taxing authority; and if buyer is
       able to obtain such certificates, Buyer shall furnish such to Seller. In
       those instances where Buyer assumes the obligation to pay sales, use,
       excise personal property taxes directly to a taxing authority because
       buyer possesses a direct pay certificate, Seller agrees that Buyer shall
       be entitled to finance all such tax amounts under the vendor financing
       agreement described in Section 12.22 and all such tax amounts shall be
       treated as though they had been collected by Seller.

       In addition to the foregoing, *
       for any property taxes incurred by            with respect to the
       Equipment and Software following Installation of such Equipment or
       Software but prior to the passage of title thereof to *
                                                              including, but not
       limited to, those relating to franchise, net or gross income or revenue,
       license, occupation, other real or personal property, and fees relating
       to importation of the Equipment and Software.

20.2   SALES, USE AND PROPERTY TAX MINIMIZATION. Seller acknowledges that Buyer
       wishes to minimize the amounts of sales, use, excise and property taxes
       to be paid by Buyer.  Seller agrees to assist Buyer with its tax
       minimization strategy.  In furtherance of this tax minimization strategy,
       where sales, use, excise or personal property taxes can be 


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       reduced or eliminated because of the method by which Seller delivers or
       prices Deliverables to Buyer (e.g., delivering Software electronically
       rather than via magnetic storage medium), Seller agrees to employ such
       tax minimizing delivery method, when and if requested to do so by Buyer.

20.3   REFUNDS OF OVERPAYMENTS AND INTEREST. *



20.4   SELLER TO ASSIST BUYER IN SEEKING REFUNDS.  In the event Buyer believes
       that it is entitled to a refund or judicial review of all or a portion of
       the sales, use, excise or personal property taxes paid by Buyer on
       purchases made under this Agreement, then Seller agrees to provide all
       commercially reasonable assistance requested by Buyer of Seller in
       obtaining such refund or judicial review.  Seller's assistance with such
       matters shall include, but not be limited to: (i) assigning all of
       Seller's rights, if any, to a claim of refund; (ii) completing and
       processing any documents and forms necessary to request or effect a
       refund or judicial review; and (iii) providing Buyer will all relevant
       information requested by Buyer in connection with Buyer's claim of a
       refund or request for judicial review.  If Seller can provide such
       assistance at a nominal cost to Seller, then Seller shall bear the burden
       of such additional cost.  If Seller cannot provide such assistance at a
       nominal cost to Seller, then Seller shall provide Buyer with an estimate
       of the cost of such assistance.  Buyer can elect to pay Seller for such
       assistance or forego having Seller assist with Buyer's request.


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                                                                    CONFIDENTIAL

ARTICLE 21  INDEMNIFICATION AND LIMITATION OF LIABILITY

21.1   INDEMNIFICATION. Seller and Buyer agree to indemnify and hold each other
       harmless from and against all claims, demands or causes of action brought
       against the other for injury to persons (including death), or loss or
       damage to tangible property (including reasonable legal fees) resulting
       from the intentional or negligent acts or omissions, or strict liability,
       of either party, its officers, agents, employees, or subcontractors in
       the performance of this Agreement.  If Seller and Buyer jointly cause
       such losses, claims, demands, damages, or causes of action, the parties
       shall share the liability in proportion to their respective degree of
       causal responsibility.

21.2   NOTWITHSTANDING ANYTHING TO THE CONTRARY CONTAINED IN THIS AGREEMENT, IN
       NO EVENT, WHETHER AS A RESULT OF BREACH OF CONTRACT, WARRANTY, TORT
       (INCLUDING BUT NOT LIMITED TO NEGLIGENCE OR INFRINGEMENT), SHALL SELLER
       OR BUYER BE LIABLE UNDER THIS AGREEMENT FOR ANY CONSEQUENTIAL OR
       INCIDENTAL DAMAGES OF ANY NATURE WHATSOEVER, INCLUDING LOST PROFITS OF
       THE OTHER PARTY, BEFORE OR AFTER ACCEPTANCE, WHETHER OR NOT SUCH DAMAGES
       ARE FORESEEABLE OR WHETHER A PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
       SUCH DAMAGES.

21.3   INDEMNITY FOR PRODUCT LIABILITY. Notwithstanding anything contained
       herein to the contrary, Seller agrees to defend and indemnify Buyer, its
       officers, agents and employees, from and against any damages, claims,
       demands, liabilities and expenses (including reasonable attorneys' fees)
       that arise out of or result from the death or bodily injury to, or damage
       to property of any third party resulting solely from a defect in a
       product delivered by Seller except to the extent the defect is in a
       design or specification provided by Buyer.  Seller shall pay all costs,
       damages and reasonable attorneys' fees that a court awards as a result of
       such claim provided that: (i) Seller has sole control of the defense and
       related settlement negotiations; (ii) Buyer provides Seller with
       assistance, information and authority reasonably necessary for Seller to
       perform its obligations under this Section 11.3 and (iii) Buyer notifies
       Seller in writing within thirty (30) days of the discovery of the claim.
       Seller shall not be responsible for any settlement made without its
       consent. The word "products" as used in this Section 21.3 shall not be
       deemed to include any Handsets.

ARTICLE 22  INTELLECTUAL PROPERTY RIGHTS INFRINGEMENT

22.1  Seller agrees that it will defend, at its own expense, all suits and
      claims against Buyer for infringement or violation of any patent,
      trademark, copyright, trade secret, or other intellectual property rights
      of any third party (collectively, "Intellectual Property Rights"),
      covering, or alleged to cover, the Equipment, Software, or the System or
      any component thereof, in the form furnished or as subsequently modified
      by Seller, and 

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      Seller agrees that it will pay all sums, including, without limitation,
      attorneys' fees and other costs, which, by final judgment or decree, or in
      settlement of any suit or claim, may be assessed against Buyer on account
      of such infringement or violation, provided (a) Seller shall be given
      prompt written notice of all claims of any such infringement or violation
      and of any suits or claims brought or threatened against Buyer or Seller
      of which Buyer has express knowledge, and Seller shall be given full
      authority to assume control of the defense thereof through its own counsel
      at its expense and to compromise or settle any suits or claims so far as
      this may be done without prejudice to the right of Buyer to continue the
      use, as contemplated, of the Equipment, the Software or the System or any
      component thereof so furnished; and (b) Buyer shall cooperate fully with
      Seller in the defense of such suit or claims and provide Seller such
      assistance as Seller may reasonably require in connection therewith.

22.2  If in any such suit so defended, all or any part of the Equipment,
      Software, or the System, or any component thereof is held to constitute an
      infringement or violation of any other person's Intellectual Property
      Rights and its use is enjoined, or if in respect of any claim of
      infringement or violation Seller deems it advisable to do so, Seller shall
      at its sole option take one or more of the following actions *



22.3  Seller's obligations under this Article 22 shall not apply to any
      infringement or violation of Intellectual Property Rights caused by
      modification of the Equipment or Software by other than Seller or Seller's
      authorized contractor or any infringement caused solely by Buyer's use of
      the Equipment other than in accordance with the Specifications and the
      purposes contemplated by this Agreement, except as expressly authorized or
      permitted by Seller.  Buyer shall indemnify Seller against all liability
      and costs, including reasonable attorney's fees, for defense and
      settlement of any and all claims against Seller for infringements or
      violations based upon the foregoing.

22.4  THE REMEDIES STATED IN THIS ARTICLE 22 SHALL BE THE PARTY'S EXCLUSIVE
      REMEDIES FOR INFRINGEMENT OR VIOLATION OF ANY INTELLECTUAL PROPERTY
      RIGHTS.

ARTICLE 23  DISPUTES

23.1   THIRD PARTY ENGINEER. If there is a disagreement relating to installation
       and   

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                                                                    CONFIDENTIAL


       Acceptance of Equipment and Software, or equipment performance or other
       similar technical-based issue, the parties will attempt to negotiate a
       solution within fourteen (14) days of notification of such disagreement.
       If no solution can be reached, the parties shall select a third party
       engineer ("Third Party Engineer") (whose fees and expenses will be shared
       equally by Buyer and Seller) who will, after conducting such examination
       or testing as he/she deems necessary, render a decision in the matter by
       stating whether the Equipment, Software or Installation in question shall
       be Accepted.  The third party engineer shall be selected from the list of
       third party engineers set forth in Attachment R, in the order of
       appearance.  If none of the candidates set forth in Attachment R are able
       to serve and if the parties are unable to agree on the selection of a
       substitute the Third Party Engineer within five (5) working days, the
       Third Party Engineer will be selected by the then President of the
       Institute of Electrical & Electronics Engineers.

       The Third Party Engineer's decision shall be final and binding and
       neither party shall appeal or otherwise contest it, where the matter at
       dispute is ten million dollars ($10,000,000) or less in value. Once a
       Third Party Engineer is selected for resolving a dispute, he or she shall
       be selected for the resolution of any further disputes hereunder relating
       to Installation and Acceptance unless otherwise agreed to by both parties
       or unless The Third Party Engineer refuses to continue to serve in that
       function.

       Upon request by either Buyer or Seller, the Third Party Engineer, in
       resolving any dispute, shall render a written report concerning the facts
       of the dispute, the resolution thereof and the reasoning behind the
       resolution. The Third Party Engineer shall be instructed that it is the
       desire of the parties to reach resolution in the matter with dispatch. In
       rendering a decision, the Third Party Engineer shall impartially evaluate
       the facts and circumstances of the claim. The parties shall cooperate in
       supplying the Third Party Engineer with information requested and shall
       certify the accuracy of the information supplied.

23.2   ARBITRATION OF DISPUTES. Any controversy or claim arising out of or
       relating to this Agreement for the breach hereof which cannot be settled
       by the parties except for (i) disputes to be settled by a Third Party
       Engineer under Section 23.1, or (ii) action for equitable relief under
       Articles 19 or 28 that shall be resolved as provided therein, shall be
       settled by arbitration in accordance with the commercial arbitration
       rules of the American Arbitration Association as set forth herein.

       23.2.1  SELECTION OF ARBITRATORS. Each party may select one arbitrator.
               Selection shall be completed within ten (10) days of the receipt
               of a demand for arbitration. If either party fails to select an
               arbitrator within such ten (10) day period, the one selected
               shall act as sole arbitrator. If two (2) arbitrators have been
               selected, the two arbitrators selected shall select a third
               within fifteen (15) days after their selection. If they fail to
               do so, the third arbitrator shall be selected by the American
               Arbitration Association. The arbitrators

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              shall set a date of hearing no later than sixty (60) days from the
              date all arbitrators have been selected.

      23.2.2  LANGUAGE. All proceedings shall be conducted in the English
              language.

      23.2.3  LOCATION. The arbitration shall take place at a location to be
              agreed upon by the parties. if the parties are unable to agree,
              the arbitrators shall select a location in the District of
              Columbia or the Counties of Arlington or Fairfax, Virginia for the
              arbitration.

      23.2.4  FRCP TO APPLY. In any such arbitration proceeding the arbitrators
              shall adopt and apply the provisions of the Federal Rules of Civil
              Procedure relating to discovery so that each party shall allow and
              may obtain discovery of any matter not privileged which is
              relevant to the subject matter involved in the arbitration to the
              same extent as if such arbitration were a civil action pending in
              a United States District Court; provided, however, that each party
              shall be entitled to no more than four (4) depositions upon oral
              examination of no more than one (1) day in length each.

      23.2.5  FINAL AWARD. The award of any arbitration shall be final,
              conclusive and binding on the parties hereto.

      23.2.6  REMEDY. The arbitrators may award any legal or equitable remedy.
              The arbitration award shall include an award of attorney's fees,
              in the amount of such fees, to the prevailing party. Judgment upon
              any arbitration award may be entered and enforced in any court of
              competent jurisdiction.

      23.2.7  INJUNCTIVE RELIEF. Either party to an arbitration hereunder may
              bring an action for injunctive relief against the other party if
              such action is necessary to preserve jurisdiction of the
              arbitrators or to maintain status quo pending the arbitrators
              decision. Any such action called pursuant to this Section shall be
              discontinued upon assumption of jurisdiction by the arbitrators
              and their opportunity to consider the request for equitable relief
              pending final decision in the arbitration.

ARTICLE 24  TERMINATION AND DEFAULT

24.1  TERMINATION BY BUYER. The rights of the parties upon termination by Buyer
      shall be as provided below.

      24.1.1  CIRCUMSTANCES OF TERMINATION. Buyer may, upon written notice to
              Seller, terminate this Agreement in whole or in part, at its
              option, without penalty:

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          24.1.1.1  If the initial configuration in general, as opposed to
                    base station configuration equipment at a specific site,
                    (other than by the fault of Buyer or due to an event
                    specified in section 10.3) has been rightfully rejected by
                    Buyer and has not thereafter been Accepted *
                                                               or *    
                                                                
          24.1.1.2  If Seller fails to perform its obligations under section
                    22.2 and such failure results in a judicial imposition of 
                    legal damages or injunctive relief upon Buyer.

          24.1.1.3  Seller fails to meet its schedule as defined in
                    attachment H and the liquidated damages provided in section
                    10.1 have reached the maximum amount specified therein.

          24.1.1.4  Seller fails to meet its schedule as defined in
                    Attachment H as a result of excusable delay under section
                    10.3, *
                                                Notwithstanding the foregoing, *




          24.1.1.5  BANKRUPTCY. Seller (i) applies for or consents to the
                    appointment of, or the taking of possession by a receiver,
                    custodian, trustee, or liquidator of itself or of all or a
                    substantial part of its property, (ii) makes a general
                    assignment for the benefit of its creditors, (iii)
                    commences a voluntary proceeding under the federal
                    bankruptcy code or under any other law relating to relief
                    from creditors generally, or (iv) fails to contest in a
                    timely or appropriate manner, or acquiesces in writing to,
                    any petition filed against it in an involuntary proceeding
                    under the bankruptcy code or under any other law relating
                    to relief from creditors generally, or any application for
                    the appointment of a receiver, custodian, trustee, or
                    liquidator of itself or of all or a substantial part of its
                    property, or its liquidation, reorganization, dissolution,
                    or winding-up.

     24.1.2  RIGHTS OF BUYER IN CASE OF TERMINATION. In the event Buyer
             terminates this Agreement in accordance with this section 24.1,
             Buyer may, at its option, return to Seller, freight collect, in
             all or in part such equipment 

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               delivered but not yet accepted (as acceptance is described in
               sections 5.3 AND 5.4), in which event Seller shall refund to
               Buyer all amounts paid to Seller under this Agreement and shall
               compensate Buyer for the cost of removal.

24.2   TERMINATION BY BUYER FOR MATERIAL BREACH BY SELLER. The rights of the
       parties upon termination by Buyer where Seller shall be in material
       breach of the Agreement shall be as provided below.

       24.2.1  UNCURED BREACH. Buyer may, at its option and upon written notice
               to Seller, terminate this Agreement (or any order issued pursuant
               to this Agreement) in whole or in part, if Seller is in default
               under any material terms of this Agreement, other than those
               specified in section 24.1.1.1 and section 24.1.1.2, and action to
               correct such default is not commenced within sixty  *

               cannot complete such cure within such period for reasons beyond
               its control and Seller is continuing to diligently pursue the
               cure, in which case such default shall be cured no later than


       24.2.2  RETURN. In the event Buyer terminates this Agreement (or an
               order) in accordance with section 24.2.1, Buyer may at its option
               return to Seller, freight collect, any specific items of
               equipment delivered or software installed which is the subject of
               the default above, in which event Seller shall refund to Buyer
               all amounts paid to Seller under this Agreement with regard to
               such equipment, software and the installation thereof and shall
               compensate Buyer for the cost of removal.

       24.2.3  EXCLUSIVE REMEDY. Except as expressly provided elsewhere in this
               Agreement, the remedies provided in sections 24.1 and 24.2 shall
               be Buyer's exclusive remedies in case of termination for default.

24.3   TERMINATION BY SELLER. Seller may terminate this Agreement (or any order
       issued pursuant to this agreement), in whole or in part, without any
       obligation to deliver equipment, software or services not yet delivered,
       or, at its option, temporarily suspend its performance, without
       liability, under this Agreement or the system support Agreement or the
       order, in the event that:

       24.3.1  DEFAULT. Buyer is in material default under this Agreement,
               except as provided for in section 24.3.3 and correction is not
               commenced *

                                                          or such other length


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            of time as mutually agree to by the parties; or *

     24.3.2 FINANCING. Buyer is in material default under any loan or
            financing agreement entered into with Seller, and Seller has
            provided Buyer with notice of such default and correction is not
            commenced within *

                        or such other length of time as mutually agreed to by
            the parties; or *

     24.3.3 CONFIDENTIALITY. Buyer materially breaches any confidentiality
            agreement with Seller, including the provisions of Article 19, and
            Seller, while reserving all other remedies available under this
            Agreement for such a breach, has provided Buyer with notice of
            such breach; or *

     24.3.4 BANKRUPTCY. Buyer (i) applies for or consents to the appointment
            of, or the taking of possession by a receiver, custodian, trustee,
            or liquidator of itself or of all or a substantial part of its
            property, (ii) makes a general assignment for the benefit of its
            creditors, (iii) commences a voluntary proceeding under the
            federal bankruptcy code or under any other law relating to relief
            from creditors generally, or (iv) fails to contest in a timely or
            appropriate manner, or acquiesces in writing to, any petition
            filed against it in an involuntary proceeding under the bankruptcy
            code or under any other law relating to relief from creditors
            generally, or any application for the appointment of a receiver,
            custodian, trustee, or liquidator of itself or of all or a
            substantial part of its property, or its liquidation,
            reorganization, dissolution, or winding-up.

24.4   CONTINUING OBLIGATIONS IN EVENT OF TERMINATION. Except as provided in
       sections 24.1 and 24.2, if either party terminates this agreement,
       Seller's obligations hereunder with respect to equipment previously
       delivered, installed and not returned, and Buyer's obligations with
       respect to payments for accepted equipment not returned, shall continue
       in full force and effect.

ARTICLE 25  ADVERTISING

Neither Seller nor Buyer shall publicly advertise or, except as required by law,
publish information concerning the entry into, execution or delivery of this
Agreement, its nature, or the terms and conditions hereof, without the other
party's prior written consent; provided, however, that Seller or its parent
company may refer generally to Seller's performance of this Agreement in its
annual report to shareholders.


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ARTICLE 26  LATE PAYMENTS

26.1   PAST DUE PAYMENTS. Any payment not made *            shall be subject to
       a late payment charge applied against the unpaid portion of the charge.
       The late payment charge shall be applied daily after the due date until
       payment is received. The daily late payment charge shall be calculated by
       multiplying the outstanding balance for the day by that certain quotient,
       * 

                                           Any payments more than *
                 shall be considered a Seller's right to terminate under Section
       24.3, except where such sums are in dispute as provided in Section 26.2.

26.2   DISPUTED PAYMENTS. Should Buyer dispute any sums due to Seller under this
       agreement, Buyer shall pay, in accordance with the terms and conditions
       of this agreement, all amounts not in dispute. Buyer shall not be liable
       to Seller for late payment charges for the amounts paid to seller when
       the dispute is resolved. If the sum is dispute (or the cumulative sums in
       multiple ongoing disputes) exceeds five million dollars ($5,000,000)
       Seller may require Buyer to deposit the amount in dispute into as escrow.
       The escrow shall be treated for federal income tax purposes as a grantor
       trust by Buyer. In this event, the interest earned in the escrow account
       and the fees in establishing and maintaining the escrow account shall be
       divided by the parties in proportion to the resolution of the disputed
       sum, provided, however, that Buyer/Seller shall receive on an annual
       basis a distribution from the escrow equal to the product of the accrued
       interest income and Buyer's/Seller's marginal combined federal and state
       income tax rate.

ARTICLE 27  COVENANT NOT TO RECRUIT

Buyer and Seller shall not solicit and/or hire any employees of the other party
or any of its affiliates who are assigned to perform work on the project, during
the period of such assignment and for *                  thereafter, without the
express written consent of employing party.

ARTICLE 28  ASSIGNMENT AND EQUITABLE REMEDIES

28.1   ASSIGNMENTS. Neither party may assign this agreement or any of its rights
       or obligations hereunder, without obtaining the prior written consent of
       the other party, such consent not to be unreasonably withheld.
       notwithstanding anything to the contrary contained in the foregoing
       sentence, either party may assign this agreement and any of its rights or
       obligations hereunder to an affiliate of such assigning party without
       obtaining the prior written consent of the non-assigning party, provided,
       however, that the assigning party shall provide the non-assigning party 
       with no less 

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       than *                of any such assignment.  In the event of an
       assignment by seller to a non-affiliate, and upon request of Buyer,
       Seller shall provide a written guarantee of the timely performance of the
       assigned duties and responsibilities hereunder.

28.2   EQUITABLE REMEDIES.  Not withstanding the provision of article 23 of this
       Agreement, the parties agree that seller may enforce provisions of this
       article 28 regarding assignment by an action for injunction or other
       equitable remedies.

ARTICLE 29  NOTICES

29.1   METHOD OF GIVING NOTICE. Any notice required under this Agreement shall
       be given in writing by hand delivery, registered mail (return receipt
       requested), or overnight courier to the appropriate party at the 
       following addresses:

       If to Buyer:

       OMNIPOINT COMMUNICATIONS INC.
       49 Old Bloomfield Road
       Mountain Lakes, NJ  07046
       Attention: Vice President/Chief Financial Officer 

       If to Seller:

       ERICSSON INC.
       Radio Systems
       740 E. Campbell Rd.
       Richardson, TX  75081
       Attention: General Counsel

29.2   CHANGE IN ADDRESS. Either party may change the address to which notice to
       it shall be sent by notifying the other party of the change and the new
       address on thirty (30) days notice given in accordance with this article.

29.3   EFFECTIVE UPON RECEIPT. Notice given under this Article 29 shall be
       deemed to have been given upon receipt by the other party.

ARTICLE 30  AUTHORITY AND COMPLIANCE WITH LAWS

30.1   APPROVALS. Buyer and Seller represent and warrant that (a) all necessary
       approvals and authority to enter into this agreement and bind the parties
       have been obtained, (b) the person executing this agreement on behalf of
       Buyer or Seller has express authority   

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       to do so and, in so doing, to bind Buyer or Seller hereto, and (c) the
       execution of this Agreement by Buyer or Seller does not violate any
       provision of any by-law, charter, regulation or any other governing
       authority of such party. Each party agrees to furnish the other with such
       documents as either party may reasonably request showing proof of
       authority in accordance with this Article.

30.2   COMPLIANCE WITH LAW. Buyer and seller shall comply with all applicable
       laws in the performance of this agreement, including the laws and
       regulations of the united states department of commerce and state
       department and any other applicable agency or department of the united
       states regarding the export or re-export of products or technology; and
       (b) indemnify each other for any loss, liability or expense incurred as
       the result of breach of this section 30.2.

ARTICLE 31  HEADINGS AND PLURALS

31.1   SECTION HEADINGS. The headings given to the articles and sections 
       contained herein are inserted only for convenience and are in no way to
       be construed as or constitute a limitation of the scope of the particular
       article or section to which the title refers.

31.2   PLURALS. Any reference herein to singular shall mean plural and vice
       versa as the context may so require.

ARTICLE 32  GOVERNING LAW; SEVERABILITY

THIS AGREEMENT SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH AND GOVERNED
BY THE INTERNAL LAWS OF THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO
PRINCIPLES OF CONFLICTS OF LAW THEREOF.  Whenever possible, each provision of
this Agreement shall be interpreted in such a manner as to be effective and
valid under such applicable law, but, if any provision of this Agreement shall
be held to be prohibited or invalid in any jurisdiction, the remaining
provisions of this Agreement shall remain in full force and effect and such
prohibited or invalid provisions shall remain in effect in any jurisdiction in
which it is not prohibited or invalid.

ARTICLE 33  NO WAIVER

The failure of either party to insist, in any one or more instances, upon the
performance of any of the terms, covenants or conditions of this Agreement, or
to exercise any right hereunder, shall not be construed as a waiver or
relinquishment of the future performance of any such terms, covenants, or
conditions or the future exercise of such right, and the obligation of the other
party with respect to such future performance shall continue in full force and
effect.

                                     -63-
<PAGE>
                                                                 CONFIDENTIAL


ARTICLE 34     ENTIRETY OF AGREEMENT; NO ORAL CHANGES

This Agreement and the Attachments referenced herein constitute the entire
Agreement between the parties with respect to the subject matter hereof, and
supersedes all proposals, oral or written, all previous negotiations, and all
other communications between the parties with respect to the subject matter
hereof.  No modifications, alterations or waivers of any provisions herein
contained shall be binding on the parties hereto unless evidenced in writing
signed by duly authorized representatives of both parties as set forth in
Article 16.


ARTICLE 35     ATTACHMENTS AND INCORPORATION

35.1           INCORPORATION. The following documents attached hereto, are
        hereby incorporated by reference herein, and made a part of this 
        agreement with the same force and effect as though set forth in their
        entirety herin  (such documents together with this agreement are herein
        referred to as the "Agreement").
  
        Attachment A-1       Equipment List and Itemized Price List (Unit
                             Prices)
        Attachment A-2       Pricing Assumptions
        Attachment A-3       Not Included Items (Options)
        Attachment B         Operations Support System Software License and
                             Support Services
        Attachment C         Professional Services
        Attachment D         System Support Services
        Attachment E         CMS 40 Documentation
        Attachment F         Responsibility Matrix
        Attachment G         Environmental Conditions
        Attachment H         Time Schedule
        Attachment I         Radio Network Design
        Attachment J         Acceptance Tests/Certificate
        Attachment K         CMS 40 R1 Features and R2 Planned Features
        Attachment L         Order Cancellation Policy
        Attachment M         CMS 40 Technical and Functional Specifications
        Attachment N         Intentionally Omitted
        Attachment O         Support Organization
        Attachment P         Intentionally Omitted
        Attachment Q         Technical Education
        Attachment R         Third Party Engineers
        Attachment S         Order & Delivery Intervals
        Attachment T         Reimbursement Policy


35.2           ORDER OF PRIORITY. In the event of any conflict or inconsistency
       among the provisions of this agreement and the documents attached and
       incorporated herein, such conflict or inconsistency shall be resolved, by
       giving precedence to this 

                                     -64-
<PAGE>
                                                                   CONFIDENTIAL


      Agreement and thereafter to the Attachments.

ARTICLE 36  COUNTERPARTS

      This Agreement may be executed in two counterparts, each of which shall be
deemed an original, but both of which together shall constitute one and the same
instrument.

In Witness Whereof, the parties have executed this Agreement as of the date
first written above.


ERICSSON INC.                       OMNIPOINT COMMUNICATIONS INC.


By: /s/ Bo Hedfors                  By /s/ George F. Schmitt
    ---------------------              ----------------------------

Name: Bo Hedfors                    Name: George F. Schmitt
      -------------------                 -------------------------
      [Print]                             [Print]

Title: President                    Title: President
       __________________                  _________________________

                                     -65-
<PAGE>


<TABLE>
<CAPTION>
                                  ATTACHMENTS
                                  -----------

<C>             <S> 
Attachment A    Pricing

Attachment B    Operations Support System Software License and Support Services

Attachment C    Professional Services

Attachment D    System Support Services

Attachment E    CMS 40 Documentation

Attachment F    Responsibility Matrix

Attachment G    Environmental Conditions

Attachment H    Time Schedule

Attachment I    Radio Network Design

Attachment J    Acceptance Tests/Certificate

Attachment K    CMS 40 R1 Features and R2 Planned Features

Attachment L    Order Cancellation Policy

Attachment M    CMS 40 Technical and Functional Specifications

Attachment N    Intentionally Omitted

Attachment O    Support Organization

Attachment P    Intentionally Omitted

Attachment Q    Technical Education

Attachment R    Third Party Engineers

Attachment S    Order & Delivery Intervals

Attachment T    Reimbursement Policy
</TABLE>
<PAGE>


                             *CONFIDENTIAL INFORMATION;
                             HAS BEEN OMITTED AND FILED
Omnipoint Contract 2/27/96   SEPARATELY WITH THE COMMISSION        Attachment A


                             OMNIPOINT CORPORATION
                             ---------------------

                                    *     

                                        
                                        
                                        
                                        
Ericsson Inc.-Not for use or disclosure outside Omnipoint except under written
agreement
<PAGE>
 
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                                       *
                                       
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<PAGE>
 
                                                                   ATTACHMENT A
                        *CONFIDENTIAL INFORMATION;        ACQUISITION AGREEMENT
                        HAS BEEN OMITTED AND FILED                     # 9107
                        SEPARATELY WITH THE COMMISSION

                                       *
                                       
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                                       *

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<PAGE>
 
                                                                ATTACHMENT A-18
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                                       1
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<PAGE>
 
                                                                ATTACHMENT A-20
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                                       *
                                        
<PAGE>
 

                        *CONFIDENTIAL INFORMATION;              Attachment A-21
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                                       *

                                      -1-
<PAGE>
 

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                                       *

                                      -2-
<PAGE>


                         *CONFIDENTIAL INFORMATION;
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                                AGREEMENT 9107
                         OMNIPOINT COMMUNICATIONS INC.
                                 ATTACHMENT B
                                  OSS SUPPORT

1.   Hardware Support
     ----------------

     Any third party hardware equipment purchased through Seller for use in the
     Buyer's OSS application shall be warranted *                      during
     the Warranty Period. Buyer may purchase at the completion of the Warranty
     Period an Extended Hardware Maintenance Agreement from Seller, or other
     post-warranty support from the third party providing the OSS hardware. The
     prices Seller charges for Extended Hardware Maintenance support are set
     forth in Exhibit I to this Attachment B. Should additional third party
     hardware purchased through Seller be added to the OSS system subsequent to
     the initial installation, the equipment Extended Hardware Maintenance
     Agreement may be amended to include the new equipment.

2.   Software Support
     ----------------

     2.1  Buyer shall receive and be licensed to use all OSS Software
          Enhancements during the Warranty Period. For purposes of this
          Attachment B, "Software Enhancements" means modifications or
          improvements made to the System software, but not including new
          software features, which improve performance or capacity of the
          software but which are not necessary to ensure that the software
          operates according to the original specification.

     2.2  During the Warranty Period, Seller will provide: (i) assistance in the
          implementation of new OSS Software purchased by Buyer; (ii) 24-hour
          telephone assistance; (iii) fault tracking reporting and resolution;
          and (iv) emergency software patches when required.

     2.3  After expiration of the Warranty Period, Buyer may purchase the
          support services described in paragraphs 2.1 and 2.2 above at the
          prices set forth in Exhibit I to this Attachment B.

     3.4  Upon request by Buyer, Seller shall make available on-site technical
          assistance at Seller's standard rate then in effect.



3.   Limits on Support Services
     --------------------------

     The parties agree that the limitations set forth in Section 13.6 of the
     Acquisition Agreement to which this Attachment B is made a part shall apply
     to the warranty and post-warranty support obligations of Seller.  In
     addition, Seller may, without liability to Buyer, terminate, or suspend
     performance of, provisions of the Support Services affected if, in Seller's
     reasonable judgment:

                                      -1-
<PAGE>

           (a) The System is not maintained to two (2) revisions prior to the
               latest OSS Software Release level; or

           (b) Seller is not provided access to the System and to such
               information and facilities as Seller may reasonably require in
               order to provide the Support Services;

4.   Support Responsibilities of Seller
     ----------------------------------

     4.1   Seller may access OSS equipment and software for the purposes of
           providing support services under the following conditions:

     (i)   Seller shall notify Buyer in advance with a Work Order of the purpose
           of the work.

     (ii)  Seller shall notify Buyer at least forty-eight (48) hours in advance
           and in writing of changes to NIS tables and X.25 addresses.

     (iii) Seller shall notify the Buyer in writing with a Work Report within
           forty-eight (48) hours after completing any modifications made to
           Buyer files that involve the following:

           .    changes to .cshrc,.login, NIS tables and any file in the /etc
                director
           .    changes to root directory structure
           .    changes to disk mounts
           .    changes to the OSS Authority database
           .    changes to the OSS X.25 control tables
           .    changes to installed software provided by Seller
           .    addition and removal of OSS userids
           .    changes to IOG11 parameters
           .    changes to Unix partitions
           .    changes to Unix kernel

     (iv)  Seller shall notify the Buyer at least twenty-four (24) hours in
           advance of any network operations Buyer needs to perform to fulfill
           the Work Order. Network operations include but are not limited to:
           scheduling of network measurements and recordings, modifications to
           network configurations, collection of network configuration
           printouts.

     4.2   Seller shall always use the same maintenance user identification with
           root privileges provided by the Buyer to perform the operations
           listed in paragraph 4.1(iii).

5.   Support Responsibilities of Buyer
     ---------------------------------

     5.1   Buyer shall perform system management operations on systems provided
           by Seller according to practices outlined in the documentation
           provided by Seller or communicated in writing by Seller from time-to-
           time.

                                      -2-
<PAGE>

     5.2  Buyer shall notify Seller of any of the following changes performed on
          systems provided by Seller:

          .  changes made to NIS tables (includes host names and TCP/IP
             addresses falling under files provided by Seller)
          .  changes made to files in /etc directory
          .  changes to .cshrec, login of default userids provided by Seller
          .  changes to root directory structure
          .  changes to disk mounts
          .  changes to the OSS Authority Database for default userids
          .  changes to the OSS Authority Database structure of authority
          .  changes to the OSS X.25 control tables
          .  changes to installed software provided by Seller
          .  removal of default userids provided by Seller
          .  changes to IOG11 parameters
          .  changes to Unix partitions on machines running systems provided by
             Seller
          .  changes to Unix kernel on machines running systems provided by
             Seller
          .  installation of additional software on Assets provided by Seller

     5.3  Buyer shall provide to Seller access to the maintenance user
          identification, including outside normal working hours.

     5.4  Buyer shall enable remote modem access to Seller on a 7 day/24 hour
          availability basis.

          5.5   Buyer shall perform routine hardware preventative maintenance
          and cleaning, and prior to requesting support from Seller, Buyer shall
          comply with all published operating and troubleshooting procedures. If
          such efforts are unsuccessful in eliminating the malfunction, Buyer
          shall promptly notify Seller of the malfunction.

          5.6   Buyer shall regularly back up data to the extent the OSS
          hardware and software permits.

          5.7   Buyer shall provide Seller with (i) reasonable and safe access
          to OSS systems; (ii) adequate working space and facilities at the
          Installation Address; (iii) access to and use of all facilities of
          Buyer necessary for Seller or its representatives to provide support
          services; and (iv) cooperation in maintaining a site activity log.

6.   The examination, replacement, and handling of hardware components can be
     hazardous. All related support tasks should be performed by qualified
     service personnel with the appropriate technical training and experience to
     recognize these hazards (e.g., electrostatic discharge) and observe all
     protection procedures and precautions. Buyer agrees to use qualified
     service personnel or to employ adequate safety precautions in the
     performance of its obligations hereunder.

                                      -3-
<PAGE>

                                  ATTACHMENT B
                          ACQUISITION AGREEMENT #9107
                         OMNIPOINT COMMUNICATIONS INC.
                                   EXHIBIT 1
                                       TO
                           ATTACHMENT B - OSS SUPPORT
                              OSS MAINTENANCE FEES
Software Support
- ----------------

Following the Warranty Period described herein and in the Acquisition Agreement,
a fifteen percent (15%) percent maintenance fee shall be applied to all OSS
Software Buyer Fees, including pay-as-you-grow fees.

Hardware Support
- ----------------

Seller offers the Silver SunSpectrum Support Service as its SUN Hardware Support
solution.  This hardware support service includes the following:

 .    7x24 on-site response and telephone assistance
 .    Four-hour, on-site response is provided for Urgent problems
<TABLE>
<CAPTION>

PRICING
- ------------------------------------------------------------------------------
           MODEL                                   7X24 SUPPORT/UNIT/MONTH
- ------------------------------------------------------------------------------
<S>                                                <C>
       SPARCstation 4                                      $ 75.00
- ------------------------------------------------------------------------------
       SPARCstation 5                                      $120.00
- ------------------------------------------------------------------------------
           p- 20                                           $180.00
- ------------------------------------------------------------------------------
      SPARCsystem 1000                                     $228.00
- ------------------------------------------------------------------------------
      SPARCprinter II                                      $ 40.50
- ------------------------------------------------------------------------------
</TABLE>

 .    SUNSPECTRUM SILVER PROGRAM TRAVEL ZONE UPLIFTS*

<TABLE>
<CAPTION>

- ------------------------------------------------------------------------------
ZONE                                 MILES                CHARGE
- ------------------------------------------------------------------------------
<S>                                 <C>                  <C>
A                                    0-50                  None
- ------------------------------------------------------------------------------
B                                   51-100               MMC + 5%
- ------------------------------------------------------------------------------
C                                   101-150              MMC + 15%
- ------------------------------------------------------------------------------
D                                   151-250              MMC + 30%
- ------------------------------------------------------------------------------
E                                   251-300              MMC + 50%
- ------------------------------------------------------------------------------
</TABLE>
*  Based on distance from nearest Sun Support Location

                                      -4-
<PAGE>
 
                             OMNIPOINT CORPORATION          ATTACHMENT C
                             ---------------------

                               WIRELESS SERVICES     ACQUISITION AGREEMENT #9107
                               -----------------

In witness hereof, all parties signed below are in agreement to the enclosed
Attachment C, Revision A, dated December 18, 1996.


ERICSSON INC.                          OMNIPOINT CORPORATION  
/s/ Per Nachmanson                     /s/ Christopher Resavy
- -------------------------------------  ----------------------------------------
Per Nachmanson                         Christopher Resavy
Account Manager - Northeastern Region  Senior Director of Engineering/Operations
                                       /s/ Curt Gervelii
                                       ----------------------------------------
                                       Network Engineer on behalf of Mr. Resavy
<PAGE>
 
                                   ERICSSON



                                 THE ALLIANCE



                               CUSTOMER SERVICES
<PAGE>
 
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
SECTION DESCRIPTION                                                       PAGE
- ------- -----------                                                       ----
<S>                                                                       <C>
 
1.   INTRODUCTION............................................................2
     ------------
2.   PROFESSIONAL SERVICES...................................................3
     ---------------------
2.1  NETWORK PLANNING AND EXPANSION..........................................4
2.2  SYSTEM PERFORMANCE EVALUATION...........................................5
2.3  SYSTEM OPERATION CONSULTING.............................................6
2.4  NETWORK MANAGEMENT CONSULTING...........................................7
2.5  BUSINESS OPERATIONS CONSULTING..........................................8

3.   IMPLEMENTATION & INTEGRATION SERVICES...................................9
     -------------------------------------
3.1  SITE ACQUISITION.......................................................10
3.2  CIVIL CONSTRUCTION.....................................................11
3.3  SITE EQUIPMENT ENGINEERING.............................................12
3.4  EQUIPMENT INSTALLATION AND COMMISSIONING...............................13
3.5  SYSTEM OPTIMIZATION....................................................14

4.   MAINTENANCE AND SUPPORT SERVICES.......................................15
     --------------------------------
4.1  SYSTEM SUPPORT.........................................................16
4.2  SPARE PART MANAGEMENT SERVICE..........................................17
4.3  HARDWARE REPAIR........................................................18
4.4  OPERATION AND MAINTENANCE MANAGEMENT...................................19
4.5  OPERATION AND MAINTENANCE ASSISTANCE...................................20
4.6  CONFIGURATION MANAGEMENT...............................................21
4.7  NETWORK MANAGEMENT SYSTEM ADMINISTRATION...............................22
4.8  PERFORMANCE REPORT CUSTOMIZATION.......................................23
4.9  REMOTE NETWORK MONITORING..............................................24
4.10 REMOTE NETWORK OPERATIONS..............................................25
5.   TRAINING SERVICES......................................................26
     -----------------
5.1  CERTIFICATION PROGRAM..................................................27
5.2  COMPETENCE DEVELOPMENT PROGRAM.........................................28
</TABLE> 
                                    Page 1
<PAGE>
 
1.          INTRODUCTION
            ------------

            Choosing Ericsson as your Personal Communications Services
            (wireless) vendor provides you with the latest in telecommunication
            equipment, the CMS  40 system.  Equally important to your business
            is Ericsson's extensive line of customer service offerings.
            Ericsson's turnkey services provided your customers with an
            operational system as quickly as possible.  Faster system
            implementation time safeguards your infrastructure and facilitates a
            quicker return on your investment.

            Our Technical Support Center as well as our Regional Support
            Organization provide you with the expertise, resources, and time
            necessary to build, operate, and maintain your wireless network.  In
            addition, Ericsson offers several service and support options custom
            tailored to address your system and subscriber needs.  Whether you
            require minimum involvement or maximum participation, Ericsson
            provides the services critical in handling your network operations.

            This document presents a variety of services such as, Professional
            Services, Implementation and Integration Services, Maintenance and
            Support Services as well as Training Services.

            Ericsson is committed to providing value added service offerings to
            our customers, which in turn establishes a long-term, mutually
            beneficial business relationship.  Please feel free to discuss any
            of the specific service requirements with your Ericsson Services
            Sales Manager.

                                    Page 2
<PAGE>
 
2.          PROFESSIONAL SERVICES
            ---------------------

            As a leading supplier of wireless system infrastructure, Ericsson
            has developed proven expertise in value added Professional Service
            offerings.  The Ericsson Alliance works with you to define specific
            characteristics for a new or expanded wireless network.  Detailed
            reviews of system performance and strategic recommendations for
            network planning and expansion are a few of the many service
            offerings available to you.

            Ericsson analyzes your business and systems operations to reduce
            costs and improve system performance.  In addition, Ericsson's
            experienced personnel works with you to review and improve internal
            processes and competence by providing customized solutions for
            business and system operations.

            The following sections highlight individual Professional Service
            offerings, please feel free to discuss any of your service
            requirements with your Ericsson Services Sales Manager.

                                    Page 3
<PAGE>
 
2.1         NETWORK PLANNING AND EXPANSION

            Network Planing and Expansion provides initial radio frequency (RF)
            design, network dimensioning, and expansion planning for wireless
            systems.  This service can be provided with customer defined levels
            of Ericsson support or as a total turnkey design.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Provides quick time to market of wireless service for your
               customers.

            .  Provides proven capabilities to ensure a quality system design.

            .  Provides a network platform for future expansion that adapts to
               new technologies and customer demands.


            DESCRIPTION OF SERVICE
            ----------------------

            Ericsson's Network Planning and Expansion Service provides you with
            plans and/or recommendations on initial development or systematic
            expansion of your wireless network.

            Ericsson provides personnel with an in-depth knowledge of cell,
            frequency, transmission, and network planning principles.  Ericsson
            team members also have the expertise for performing border, trunk,
            and signaling network analysis as well as system capacity analysis.

            In an effort to better meet your current and future customer
            demands, Ericsson engineers provide a plan which shows how, when,
            and where to configure your wireless network, whether it be to
            develop/improve route capacity or to develop/improve network node
            configurations.

                                    Page 4
<PAGE>
 
2.2         SYSTEM PERFORMANCE EVALUATION

            Ericsson's System Performance Evaluation (SPE) service provides an
            in-depth analysis of coverage, capacity, efficiency, reliability,
            and quality of your wireless system.  In addition, SPE makes
            recommendations critical for improving the performance of your
            system.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Identifies subscriber-perceived quality concerns such as speech
               quality, call delivery, call setup, and handoff success as well
               as issues critical for system reliability.

            .  Provides recommendations for improving the capacity, reliability,
               and efficiency of the wireless network.

            .  Provides a plan of action to meet the needs of chaining traffic
               patterns and subscriber growth.

            DESCRIPTION OF SERVICE
            ----------------------

            Ericsson's System Performance Evaluation Service evaluates your
            system at various levels of network configurations and traffic
            patterns.  This service is divided into several sections:  An
            Overall System Performance Analysis is performed regularly on the
            entire network and is intended to focus on subscriber perceived
            quality of service.  The overall performance evaluation highlights
            any problems found and provides a list of the most problematic cells
            in each performance area.

            If required, a more detailed investigation can be performed for the
            most problematic cells using the Detailed Problem Analysis.  this
            problem analysis will provide corrective action recommendations in
            areas such as:

            .  Handoff
            .  Cell capacity
            .  Voice quality
            .  Call delivery

            A performance evaluation can also be applied to specific nodes in
            your system to ensure that areas such as power, grounding, or data
            transcripts are in appropriate conditions.  This evaluation becomes
            essential when planning extensive expansions, updates, and/or
            enhancements to your system.

                                    Page 5
<PAGE>
 
2.3         SYSTEM OPERATION CONSULTING

            The System Operation Consulting service provides Ericsson certified
            consultants to improve Operations and Maintenance processes and
            procedures while establishing a platform for location based
            mentoring.

            The results of implementing the System Operations Consulting service
            include:

            Evaluation and recommendations of process and procedures, routines
            and in-house competence levels.
            Introduction of Maintenance Operations Procedures (MOP) into the
            operator's networks.
            Coordination of network operations and maintenance.
            Event based systematic knowledge transfer to operator's technicians.
            Competency transfer of MSC/BSC, NMC/OMC and BTS operations,
            maintenance and support.
            Improved network and in-service performance.
            Greater end-user satisfaction.

            Examples of the areas addressed by this service are:

            Documentation of current processes, practices and procedures of AXE
            element operations and maintenance.
            Alarm handling, shift hand over and escalation procedures.
            Power and synchronization areas.
            OMC establishment, staffing and security issues.
            Necessary methods and tools provisioning.
            O&M organization planning and emergency support handling.
            Subscriber feature related O&M training
            Activity-based on-site training

            The System Operations Consulting Service itself is delivered by
            Ericsson consultants with a high level of appropriate expertise.
            Customer feedback and O&M statistics help ensure that corrective
            actions implemented meet your performance requirements.  This
            information is also used to continuously improve the service
            delivery process.

                               Page 6          
<PAGE>
 
2.4         NETWORK MANAGEMENT CONSULTING

            Ericsson's Network Management Consulting addresses the operators
            need for centralized operations and provides a plan for the
            implementation of either or all of the following:

            >  Network Management System
            >  Network Management Center
            >  Operations Management Center

            Ericsson engineers also analyze network operations and management to
            provide solutions addressing additional Network Management
            solutions.

            KEY FEATURES AND BENEFITS
            --------------------------

            OPERATIONS AND MAINTENANCE.  Ericsson engineers are available to
            provide technical recommendations for network operations and
            maintenance during daily activities.

            IMPLEMENTATION OF NMC DESIGN.  Ericsson provides NMC control room
            design, architecture development, network documentation, alarm
            presentation and customizing support systems based on the Ericsson
            NMS product.

            PROCESSES AND PROCEDURES.  Provides expertise for the development of
            methods and procedures required for NMC/OMC functions.

            OPERATIONS AND VERIFICATION.  Ericsson verifies the operation of the
            NMC/OMC prior to endorsing responsibility to the operator.

            CENTRALIZED OPERATIONS.  The Network Management Center allows for
            easier management and maintenance of your telecommunications network
            from one centralized location.

            DESCRIPTION OF SERVICE
            ----------------------

            The Network Management Consulting service provides you with
            recommendations for development of a Network management System,
            Network Management Center and/or Operations Management Center.
            Additionally, Ericsson engineers provide onsite consulting of the
            operators current network management solution to recommend network
            performance improvements using Ericsson's Network Management System
            product.

                                    Page 7
<PAGE>
 
2.5         BUSINESS OPERATIONS CONSULTING

            Ericsson provides a consulting service which reviews your business
            processes and procedures and provides ideas and suggestions for
            improvement.  Business Operation Consulting addresses areas such as
            subscriber administration, customer care, and billing
            administration.  Additionally, this service identifies new business
            possibilities and opportunities.

            KEY FEATURES AND BENEFITS
            -------------------------

            o  Constantly improved system administration.

            o  Integration consultancy of third party billing

            DESCRIPTION OF SERVICE
            ----------------------

            Ericsson's Business Operations Consultancy service provides you with
            information on areas of your business operation that are critical
            for revenue enhancing opportunities.  Some of these areas include:

            o  Customer care and subscriber administration procedures.

            o  Fraud prevention activities in the network.

            o  Issues related to churn (subscriber or employee turnover)
               minimization.

            o  Wireless data and Intelligent Network (IN) related businesses.

                                    Page 8
<PAGE>
 
3           IMPLEMENTATION & INTEGRATION SERVICES
            -------------------------------------

            As the design and planning of your wireless network evolves, the
            Implementation and Integration Services of The Ericsson Alliance
            provides you with true turn-key solutions.

            The Ericsson Alliance handles the technical and political realities
            associated with the Site Acquisition process, to help avoid costly
            delays.  We ensure the quality construction of sites with our Civil
            Construction Service and safeguard your system performance with our
            Site Equipment Engineering and Equipment Installation and
            Commissioning Services.  As your network begins operations, we
            provide the expertise for the construction of a Network Management
            Center to administer day-to-day O&M activities.  To excel in
            customer satisfaction, Ericsson also provides a Customer Care
            Implementation Service to handle your subscriber related activities.

            The following sections highlight individual Implementation and
            Integration Service offerings, please feel free to discuss any of
            the specific service requirements with your Ericsson Services Sales
            Manager.

                                    Page 9
<PAGE>
 
3.1         SITE ACQUISITION

            Ericsson's Site Acquisition service provides an expedient solution
            for your site acquisition needs.  This service provides optimal site
            locations for various system nodes as well as real estate
            procurement assistance, essential for your rapid deployment needs.

            KEY FEATURES AND BENEFITS
            -------------------------

            Provides Ericsson's expertise as well as partnerships with qualified
            contractors to ensure quality real estate, zoning, legal, and
            environmental expertise.

            Eliminates your need to dedicate additional personnel for site
            acquisition activities.

            Ericsson represents you in obtaining the best possible site
            locations, both economically and geographically.

            DESCRIPTION OF SERVICE
            ----------------------

            The Site Acquisition Service provides you with a number of optimally
            located sites, as determined by your initial cell and plans and
            search rings.  Ericsson handles all activities involved in acquiring
            these sites, such as:

            o  Initial Zoning review
            o  Site location and permit assistance
            o  Negotiating and execution of leasing agreements
            o  Site surveys and mapping
            o  Title and environmental review
            o  Architectural and engineering/analysis

                                    Page 10
<PAGE>
 
3.2         CIVIL CONSTRUCTION

            Ericsson's Civil Construction service provides general contracting
            service for the construction and preparation of your base station,
            switching center, Network Management Center and other construction
            needs.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Ericsson assumes the burdens associated with general contracting,

            .  Provides shorter time to commercial operation by utilizing
               Ericsson's proven construction management techniques.

            .  Ensure that only those personnel and/or contractors with proven
               abilities will construct your sites.

            DESCRIPTION OF SERVICE
            ----------------------

            Ericsson will coordinate all activities related to the civil
            construction of cell sites, switch rooms, and network management
            rooms, serving as your general contractor.  The range of commitment
            covers areas such as:

            .  Customer approved site plans.
            .  Site preparation.
            .  Construction/project management.
            .  Provisioning and/or installation of equipment shelters.
            .  Tower and monopole erection.
            .  Electrical and telco installation.
            .  Antenna and feeder installation.
            .  Generator, environmental, and security installation.



                                    Page 11
<PAGE>
 
3.3         SITE EQUIPMENT ENGINEERING

            Ericsson's Site Equipment Engineering service provides site surveys,
            preparation, and specifications for the physical layout and
            dimensioning of switch, radio, OSS, transmission, and other operator
            equipment.  This service is performed for multi-vendor equipment.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Provides expert advice on expansion possibilities and efficient
               equipment layout.

            .  Minimizes future expansion problems when additional equipment is
               added.

            .  Provides a complete set of site documentation including
               installation specifications, commissioning procedures, and
               interconnection diagrams.

            DESCRIPTION
            -----------

            Experienced Ericsson engineers collect all relevant data when a new
            installation or expansion is being planned.  They advise on the
            requirements for site preparation, space, building structures,
            environmental controls, and efficient equipment layout.

            Ericsson also recommends optimal ways to implement an extension to
            an existing installation, taking into account factors such as spare
            positions in existing cabinets, main distribution frames, digital
            distribution frames, and power frames.

            Examples of output from site equipment engineering are: floor plans,
            cabling tables, and equipment labels.  Reports, including graphical
            computer-aided design layouts, are presented as the result.


                                    Page 12
<PAGE>
 
3.4         EQUIPMENT INSTALLATION AND COMMISSIONING

            Ericsson provides a full range of installation services for Ericsson
            equipment, as well as third-party equipment.  This service will
            ensure fast, professional installation and commissioning work of
            switch, network, radio, OSS, transmission and other Ericsson
            modules.
 
            KEY FEATURES AND BENEFITS
            ------------------------- 
 
            .  Assurance of quality installation, commissioning by Ericsson's
               experienced installation personnel with proven installation
               methods.
 
            .  Ericsson resources complement your own personnel to facilitate
               installation knowledge transfer. 
 
            .  Efficient commercial availability when using Ericsson's
               experience in system equipment turnup and/or changeout.

            DESCRIPTION OF SERVICE
            ----------------------

            Ericsson's Installation and Commissioning services covers the
            installation, commissioning and testing of new equipment and/or
            extensions of live installations.  Ericsson can also re-allocate
            and/or re-install existing equipment as well as dismantle obsolete
            equipment.

            Three levels of Equipment Installation and Commissioning services
            are offered:

            Turnkey installation and commissioning.  Ericsson provides all
            installation and commissioning work, necessary personnel,
            documentation, tools and instruments according to an agreed
            schedule.

            Quality Assurance Supervision.  Ericsson provides quality assurance
            personnel to ensure that non-Ericsson installation and commissioning
            work meets Ericsson's specified requirements and quality standards.

            Installation Audits.  Ericsson will perform post-installation
            inspections to ensure that inhouse installers and/or third party
            installers conform to quality specifications.


                                    Page 13
<PAGE>
 
3.5         SYSTEM OPTIMIZATION

            Ericsson's System Optimization service implements improvements
            recommended by Ericsson's System Performance Evaluation, RF
            engineering, and/or other performance improvement tools or experts.
            This service is designed to improve the performance and quality of
            the operators wireless network.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Implements recommendations from Network Planning and Expansion,
               System Performance Evaluation as well as other RF performance
               improvements tools.

            .  Reduces the lead time for implementation of extensive and/or
               complex improvements to system data.

            .  Minimizes disrupted service to end users during performance
               activities.

            .  Enables improvement activities to be performed securely and
               rapidly.

            DESCRIPTION
            -----------

            Ericsson engineers translate optimization recommendations into
            system data inputs for implementation into the wireless network.
            Activities covered are:

            .  Baseline drive testing, data acquisition, and modification prior
               to implementation of data changes.

            .  Translation of planning and evaluation information to system data
               MML formats and commands.

            .  Preparation, distribution and implementation of customized cell
               design data information and switch files.


                                    Page 14
<PAGE>
 
4.          MAINTENANCE AND SUPPORT SERVICES
            --------------------------------

            Ericsson maintains a long-standing tradition of prompt equipment
            maintenance and reliable customer support. Our dedicated and
            certified service personnel are centrally located to ensure rapid
            repair turnaround times. In addition, Ericsson's global support
            organizations are easily accessed through a central point-of-
            contact, facilitating rapid troubleshooting responses.

            Ericsson provides a System Support Service for routine as well as
            emergency handling of activities such as fault identification and
            analysis.  We also provide Hardware Maintenance and Replacement
            Services to ensure current hardware usage and rapid replacement
            delivery.  Ericsson provides you with "cradle to grave" tracking of
            your equipment inventories with our Configuration Management
            Service.  Our worldwide expertise can assist you in Operations and
            Maintenance or can be dedicated to you with our Operations and
            Maintenance Management Service.  As your system evolves, Ericsson's
            Network Management and System Administration Service can operate
            your OSS network to ensure optimal system performance.

            The following sections highlight individual Maintenance and Support
            Service offerings, please feel free to discuss any of the specific
            service requirements with your Ericsson Services Sales Manager.


                                    Page 15
<PAGE>
 
4.1         SYSTEM SUPPORT

            Ericsson's System Support Service is a package of services including
            Consultation and 24-hour Emergency Support, Software Maintenance
            Service and Hardware Maintenance.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Immediate assistance in resolution of operations and maintenance
               issues; a single access point to Ericsson's Customer Support
               Organization, which ensures appropriate expertise are available
               to resolve performance issues.

            .  Contractually defined response times and internal-audited quality
               control by Ericsson.

            .  Minimizes the impact to network and service operation during
               updates and corrections.

            .  Reduced need for in-house competence of Ericsson network element
               software handling.

            DESCRIPTION OF SERVICE
            ----------------------

            Ericsson's System Support provides you with an instant access to a
            strong local presence, while simultaneously taking advantage of
            centrally coordinated and integrated services.  The Consultation and
            24-hour Emergency Service, with optional on-site visits, resolves
            non-critical, day-to-day issues as well as emergencies in your
            wireless network.  One or several telephone lines are dedicated to
            you for rapid access to our Technical Assistance Center (TAC).
            Experienced system engineers are available for on-site visits should
            telephone consultation be insufficient in resolving problems or
            requests.

            Each issue handled by TAC is logged as a Customer Request (CR).  The
            CRs will be analyzed and responded to within the contractually
            defined response times.  TAC also has access to Ericsson's worldwide
            expertise and databases to quickly identify and resolve customer
            and/or end-user issues.

            The System Maintenance service regularly introduces software updates
            into the network elements for optimum system performance.  The input
            for Software Maintenance arises from issues identified in your own
            network, as well as other similar networks around the world.



                                    Page 16
<PAGE>
 
4.2         SPARE PART MANAGEMENT SERVICE

            Ericsson's Spare Parts Management Service eliminates the need for
            you to maintain your own buffer stock of spare parts.  Instead,
            spare parts will be delivered to where they are needed from
            Ericsson's own resources.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Reduces your spare parts stock and eliminates obsolete spares,
               thereby releasing working capital and reducing administrative
               workload.

            .  Guaranteed, rapid delivery of parts where they are needed,
               minimizing uninterrupted network operation.

            .  Eliminates repair concerns by always providing replacement
               spares.

            DESCRIPTION
            -----------

            This service supplies you with spares from Ericsson's spare
            resources, when needed, to replace units in your wireless network.
            Spare parts management eliminates the turnaround time associated
            with hardware repair.

            Deliveries are made directly to required locations.  Additionally
            this service dimensions field technician spare parts and enables you
            to maintain only those parts crucial to your operation.

                                     -17-
<PAGE>
 
4.3         HARDWARE REPAIR

            Ericsson's Hardware Repair Services handles the repair and/or
            replacement of hardware elements for your wireless network. In
            addition, Ericsson provides you with rapid repair turnaround time
            through Ericsson's international repair centers.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Reduced wireless network service interruption due to
               rapid turnaround of hardware repair.
            .  Guaranteed high-quality repair according to
               original design specifications.
            .  Hardware shipped from Ericsson has the latest
               revision upgrade installed at no additional charge.
            .  Contractual delivery time for repaired units.
            .  Reports, as requested by the customer, on repair
               activity, ie-MTBF, and historical data.

            DESCRIPTION OF SERVICE
            ----------------------

            ADVANCED SWAP AND REPAIR - A replacement unit is sent from Ericsson
            to any location designated by the customer, within 48 hours, BEFORE
            their faulty unit has reached Ericssons's hardware services center.
            The unit(s) can be sent directly to a field technician or warehouse
            reducing the number of spares a customer or technician needs to keep
            on hand. The rapid turnaround time for unit(s) reduces the
            customer's capital investment in spare stock, less administrative
            work, reduces transportation costs, and reduces obsolescence. The
            customer has two days to have the faulty unit back to the Ericsson
            hardware services center or they will be invoiced the purchase price
            of theunit.

            SWAP AND RETURN - On receipt of the customer's faulty unit, a
            replacement unit is delivered within 5 working days to the
            customer's warehouse. The rapid turnaround time for unit(s) reduces
            the customer's capital investment in spare stock, less
            administrative work, reduces transportation cost, and reduces
            obsolescence.

            REPAIR AND RETURN - The same faulty unit the customer sends in is
            repaired and returned within 15 working days. This feature is known
            as "Same for Same." The unit is shipped directly back to the
            customer's warehouse.

            EMERGENCY REPAIR - A customer calls the Ericsson Hardware Services
            center and requests an emergency shipment. The unit(s) are shipped
            at a moments notice from Ericsson and charged at Ericsson's then-
            current fee for this service. The cost of this service is billed on
            an ad-hoc basis and prices may vary. The unit will be received at
            the customer's site within 24 hours. Shipping options can include
            overnight service or airport counter to counter. This service
            requires little capital investment for the customer.

                                     -18-
<PAGE>
 
4.4         OPERATION AND MAINTENANCE MANAGEMENT

            Ericsson's Operation and Maintenance Management Service provides you
            with reliable Ericsson technicians for the day-to-day handling of
            O&M activities within selected areas of your wireless system.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Ericsson leads the daily O&M handling of base stations, OMC/NMCs,
               switching nodes, and regional maintenacne offices.

            .  Establishes proper procedures and routines for O&M of Ericsson
               products.

            .  Provides Ericsson's technicians to perform daily testing,
               operating and maintenacne of various network elements.

            DESCRIPTION OF SERVICE
            ----------------------

            The Operation and Maintenance Management responsibilities range from
            the handling of field maintenance to the replacement of hardware. In
            addition Ericsson provides O&M of the entire system with continuous
            monitoring of system performance and service quality. All in an
            effort to implement operations and maintenance actions.

            Ericsson's Operation and Maintenance Management service is a long-
            term commitment to the operator in managing the hands-on activities
            related to AXE and base station operation. Ericsson, by various
            means, places its personnel on site and worldwide to access various
            expertise and tools in ensuring efficient system operations.

                                     -19-
<PAGE>
 
4.5         OPERATION AND MAINTENANCE ASSISTANCE

            Ericsson's Operation and Maintenance Assistance service provides
            experienced technicians who are placed in your maintenance
            organization, to assist your staff with perations and maintenance of
            your wireless network. Ericsson provides you with proven expertise
            during periods of high resource demands.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Use of Ericsson expertise to fill your short-term personnel
               needs, expansion needs, or staff shortage needs.

            .  Provides Ericsson's technicians to perform short term (as needed)
               testing, operations and maintenance of various network elements.

            DESCRIPTION OF SERVICE
            ----------------------

            Ericsson's Operation & Maintenance Assistance service provides
            hands-on assistance by experienced Ericsson O&M personnel. These
            personnel are placed in pivotal positions to work at your switching,
            radio, OMC/NMC, or regional maintenance sites on a short-term basis.

            Assistance can be given for any type of support or O&M work, such as
            daily O&M and emergency routines, or any of the following:

            .  OSS administration.
            .  Alarm handling.
            .  Preventive maintenance.
            .  Subscriber and trunk line maintenance.
            .  Base station (RBS/BTS) maintenance.
            .  Trouble reporting.
            .  Software updates and upgrades.

                                     -20-
<PAGE>
 
4.6         CONFIGURATION MANAGEMENT

            This service tracks, traces, maintains, and controls the equipment
            inventory of your wireless network. Ericsson provides quick and
            precise responses to your infrastructure needs by managing your
            existing configuration and identifying critical configuration
            enhancements to improve your system performance.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Ensures equipment traceability from engineering through
               installation and repair.

            .  Ensures the maintenance and control of your equipment assets.

            .  Monitors equipment related warranty issues to safeguard against
               warranty neglect.

            DESCRIPTION OF SERVICE
            ----------------------

            Configuration Management handles all of your equipment traceability
            needs from "cradle to grave". This service incorporates traceability
            by embracing the needs of four major areas:

            .  Tracking of equipment from the factory (manufacturing).
            .  Tracking of equipment through shipping, receiving, preassembly,
               and pretest.
            .  Tracking of equipment at the site.
            .  Tracking of equipment through the repair process.

            Regular support between you and Ericsson facilitates the elements of
            the traceability system. This service provides valuable data to
            areas such as acceptance, billing, support and repair.

                                     -21-
<PAGE>
 
4.7         NETWORK MANAGEMENT SYSTEM ADMINISTRATION

            The Network Management System Administration service provides the
            operator with an efficient solution for the operation and
            administration of their Network Management System.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  NMS User Provisioning. Adding and deleting NMS users, creating
               and modifying user workspace menus, and provisioning for new user
               authority types.

            .  Database Monitoring. Monitoring of NMS databases for system
               capacity, turning databases to help meet operator's network
               capacity needs, setting up an efficient database backup plan, and
               monitoring database activity.

            .  UNIX File System Maintenance. Monitoring NMS file systems'
               capacity, turning file systems to help meet operator's network
               capacity needs, setting up an efficient file system backup and
               restoration plan, and identifying and restoring corrupted file
               systems.

            .  Hardware Administration. Monitoring servers, workstations, hard
               disks, printers, and modems and forecasting necessary hardware
               for system performance improvement.

            .  NMS Monitoring and Tuning. Monitoring NMS applications for
               suspect behavior, tuning of NMS processes for network efficiency

            .  NMS Application Administration. Providing NMS administration for
               the TMOS platform and developed applications.

            DESCRIPTION OF SERVICE
            ----------------------

            The Network Management System Administration service provides
            Ericsson system administration based on proven UNIX, database, and
            NMS application operations and maintenance procedures.

            System administration support is offered either locally or remotely.
            Remote administration is available either by way of a dedicated
            high-speed link to the Ericsson Network Management Center or through
            a modem connection. System administration duties requiring physical
            activities such as connecting printers and workstations or removing
            tapes from backup devices are provided via on-site support.

                                    Page 22
<PAGE>
 
4.8         PERFORMANCE REPORT CUSTOMIZATION

            This service provides customized reports to help monitor and
            optimize network performance. Customization provides operator-
            defined reports for processing traffic measurement data.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Simple and Efficient Operations. Customized reports rapidly
               generate traffic reports and well as schedule and export these
               reports in different formats with simplified point and click
               operations.

            .  Multiple Format Flexibility. The output formats can include
               columnar lists (both detailed and summary), six types of charts
               (bar, stacked bar, pie, line, scatter and area), and matrices (or
               cross-tabulation reports).

            .  Third Party Application Integration. Traffic measurements or
               statistics can be exported to applications that read ASCII files
               in both delimited and fixed-length fields Third party
               applications include dBASE II and III, Microsoft Excel, Lotus
               1-2-3, Microsoft Word for Windows (documents or mail-merge
               format), and WordPerfect.

             .  Hassle Free Upgrades. Ericsson will maintain, test, and
                implement any changes to the customized reports as necessary
                for Application System upgrades.

            DESCRIPTION OF SERVICE
            ----------------------

            Ericsson's Performance Report Customization service allows the
            operator the ability to easily monitor the performance of the
            network by review of customized statistical indicators. The
            customized report user's guide and executable program are provided
            to the operator at the completion of the service.

            Customized reports are generated and scheduled according to the
            network operator's requirements. These requirements are agreed upon
            by both Ericsson and the operator and are clearly defined in a
            project specification.

                                    Page 23
<PAGE>
 
4.9         REMOTE NETWORK MONITORING

            Ericsson's Remote Network Monitoring service provides expert
            monitoring of site alarms and alarm handling for base stations,
            switching centers, and other network elements.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Alarm Monitoring. Monitoring of network alarms for all network
               nodes by experienced Ericsson engineers located in Ericsson's
               Network Management Center.

            .  Immediate Action. Immediate action on all major network outages
               is provided by an experienced team of wireless network
               troubleshooters.

            .  Improved In-Service Performance. 24-hour monitoring of network
               alarms with immediate action improves the system's in service
               performance.

            DESCRIPTION OF SERVICE
            ----------------------

            Remote Network Monitoring utilizes Ericsson's Network Management
            System applications. Ericsson NMS engineers provide proven NMS
            solutions for network monitoring.

            Remote Network Monitoring is available via a dedicated high-speed
            link to the Ericsson Network Management Center.

                                    Page 24
<PAGE>
 
4.10        REMOTE NETWORK OPERATIONS

            A turn-key solution to network operations and maintenance is
            provided by Ericsson's Remote Network Operations service.

            KEY FEATURES AND BENEFITS
            -------------------------

            .  Turn Key Operation. Network performance monitoring, alarm
               monitoring, cellular configuration, and other network operations
               are provided by Ericsson NMS engineers via the Network Management
               Center.

            .  Effieicnt Network Troubleshooting. Identification and correction
               of network faults is provided by a team of experienced Ericsson
               network troubleshooters.

            .  Improve In-Service Performance. 24-hour operations allows for an
               improvement in the system's in-service performance.

            DESCRIPTION OF SERVICE
            ----------------------

            Remote Network Monitoring utilizes Ericsson's Network Management
            System applications. Ericsson NMS engineers provide proven NMS
            solutions for network monitoring.

            Remote Network Monitoring is available via a dedicated high-speed
            link to the Ericsson Network Management Center.

                                    Page 25
<PAGE>
 
5.          TRAINING SERVICES
            -----------------

                        Ericsson's customer training programs are designed to
                        transfer Ericsson system, performance and support
                        knowledge to your dedicated resources.  Ericsson
                        provides its Training Services using state-of-the-art
                        training facilities to combine theoretical discussion
                        and ideas with "real-world", hands on experience.

                        The Training Services of The Ericsson Alliance provide
                        your personnel with a wide range of training programs.
                        Ericsson has programs designed for CMS 40 System
                        Training to enhance the technical knowledge of your
                        selected resources.  We also provide NMC/OMC platform.
                        In addition Ericsson provides Customer Care Training to
                        focus and safeguard your subscriber related interfaces.

                        The following sections highlight NMC/OMC and customer
                        care training offerings.  Additional training courses
                        are described in Ericsson's training catalog.  Please
                        feel free to discuss any of the specific service
                        requirements with your Ericsson Services Sales Manager.



                                    Page 26
<PAGE>
 
5.1         CERTIFICATION PROGRAM

                        The Ericsson Certification Program is a program of
                        training courses designed specifically for the
                        achievement of technical certification in wireless
                        network elements.

                        KEY FEATURES AND BENEFITS
                        -------------------------

                        .  Established competence levels within your
                           organization.

                        .  Pre-defined individual competence development
                           plan.

                        .  Basic courses for core competence and special
                           courses for subject area expertise.

                        DESCRIPTION OF SERVICE
                        ----------------------

                        Ericsson's Certification program is a combination of
                        basic sources with concentration courses.  Certification
                        ensures that the participant has acquired the necessary
                        theoretical and practical training to complement the
                        experience gained from hands-on work within your
                        organization.  Currently, the areas of concentration are
                        MSC, BSC, and BTS.  Within each area of concentration,
                        multiple levels of technical competence are possible.

                        The first competence level (Level 1) provides training
                        for performance routine administration with minimal
                        guidance. The second competence level (Level 2) provides
                        training in performing normal operation and maintenance
                        activities using Ericsson exchange documentation. Level
                        3 certification provides training for diagnosing and
                        remedying hardware faults as well as for performing
                        extended operation and maintenance. Level 4
                        certification provides training in troubleshooting
                        hardware and software faults as well as trianing in
                        advanced command functions, features, and capabilities.
 




                                    Page 27
<PAGE>


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

5.2  COMPETENCE DEVELOPMENT PROGRAM                

     The Ericsson Competence Development program provides courses to develop
     in-house resources in aspects of systems activation, operation, and
     maintenance.

     Key Features and Benefits
     -------------------------

     .   Career related training paths and courses for your O&M professionals.

     .   Courses at Ericsson's international training centers, or at your
         premises.

     .   Provide an introduction to new features and network technologies.

     Description of Service
     ----------------------

     Training in the handling of wireless system is necessary for various
     personnel within your organization. For many years, Ericsson has developed
     training courses at many levels including products and systems. Aside from
     traditional classroom training, many courses are in the form of Computer-
     Based Training, available for use on your desktop computers.

     Training courses are available in areas such as radio system, switching
     system, and centralized operation. An example of the competence development
     structure is shown below:

                   ----------------------------------------
                              System Introduction
                   ----------------------------------------
                                    MSC O&M
                   ----------------------------------------
                                MSC Digital O&M
                   ----------------------------------------
                               Advanced MSC O&M
                   ----------------------------------------
                               IOG-11 Operations
                   ----------------------------------------
                             Measurement Functions
                   ----------------------------------------
                              Signaling System #7
                   ----------------------------------------

     In addition to product related courses, Ericsson offers courses in other
     areas, such as new system features, new system technologies, and customer
     care. These courses are designed for the development of your operational,
     business, and marketing personnel.    

                                    Page 28
<PAGE>
 

EQUIPMENT COMPATIBILITY EVALUATION

          The Ericsson Equipment Compatibility Evaluation service ensures the
          compatibility between Ericsson's products as well as products from
          other vendors.

          Key Feature and Benefit
          -----------------------

          .  Verifies that your network equipment and software (Ericsson and
             non-Ericsson) interface properly to maintain a high performance 
             system.

          Description of Service
          ----------------------

          Ericsson tests and evaluates other vendor products for compatibility
          and performance with Ericsson's technical specifications for 
          equipment. This service assures that equipment will interface and
          function properly prior to commissioning into your wireless network.

          In addition, this service provides compatibility testing for new and
          upgraded software features for Ericsson and non-Ericsson equipment.

<PAGE>
                                 AGREEMENT 9107
                         OMNIPOINT COMMUNICATIONS INC.
                                  ATTACHMENT D
                            SYSTEM SUPPORT SERVICES
                            -----------------------

In addition to the provisions of the Acquisition Agreement, of which this
Attachment D is made a part, including without limitation, Article 13 -
Warranties, which provisions shall supersede these provisions in the event of
any inconsistency, Seller agrees to render System Maintenance Services to Buyer
on the following terms and conditions:

1.    EQUIPMENT MAINTENANCE SUPPORT
      -----------------------------

     (a)  After the Warranty Period and for a period of ten (10) years
          thereafter, Buyer has the option to purchase, Equipment Maintenance
          Support Services on an annual basis or to purchase such services on
          per board ad hoc basis.

     (b)  Hardware Maintenance Support includes repair and replacement of all
          Seller-manufactured Base Station and Network Element Equipment,
          excluding batteries.

     (c)  In accordance with the terms of Article 13 of the Acquisition
          Agreement, Equipment faults in units or printed circuit boards shall
          be corrected by Seller's Repair Center on a repair-or-replacement
          basis.

     (d)  Buyer shall dismantle and ship, at its expense, faulty components to
          Seller's Richardson, Texas, location (or such other location
          designated by Seller) where Seller will repair or replace the
          components and reship, at Seller's expense, to Buyer within twenty
          (20) working days of receipt. Special one (1) day emergency turnaround
          is available at Seller's then-current fee for such service. Seller
          will utilize overnight air shipment to return these emergency boards
          to Buyer's location.

     (e)       (i)   Ad hoc Service:  If Buyer selects the option to purchase
               Maintenance on a per board ad hoc basis, such services shall be
               charged at Seller's then current repair fee for such boards or
               Equipment, which charges shall be paid on a per shipment basis
               within thirty (30) days of invoice therefor.

               (ii)  Annual Service: If Buyer elects to purchase Equipment
               Maintenance Support on an annual basis, the annual fee, such
               services shall be charged at Seller's then-current fee for annual
               services for the Equipment set forth in the order for Maintenance
               Support, which fee shall be payable monthly in advance upon
               invoice therefor. The fee for the first year, if it is not a full
               calendar year, shall be prorated 

                                      -1-
<PAGE>

               for the number of days remaining in such year. There shall be an
               additional monthly charge per radio channel for related Equipment
               whose warranty expires prior to the warranty expiration for the
               radio channel itself.

     (iii)  The Maintenance Support option selected by Buyer shall be valid for
            the entire year, at the end of which Buyer shall have the right to
            exercise either option for the following year thereafter.

     (f)    At Buyer's request, Seller will provide Maintenance Support Service
            as described herein for third party equipment purchased from or
            through Seller pursuant to the Acquisition Agreement at cost plus
            sixteen percent (16%) for handling.

2.    SOFTWARE MAINTENANCE SUPPORT
      ----------------------------

            (a)   After the Warranty Period and for a period of ten (10) years
            thereafter, Buyer has the option (required for Small Node Switches)
            to purchase Software Maintenance Support services on an annual basis
            from Seller.

            (b)   Software Maintenance Support shall include: (i) all Software
            Updates issued by Seller as part of the standard maintenance
            service; (ii) in accordance with Article 13 of the Acquisition
            Agreement, correction of faults that are determined to be software
            based (including emergency Software patches, if required); (iii) 
            24-hour telephone assistance (TAC) for problem resolution, fault
            report handling, tracking and resolution; and (iv) "Tech Tips" on
            radio and MSC operation. The right to use new Software Features or
            Software Enhancements are priced separately and are not released as
            part of this maintenance plan.

            (c)   The price for Software Maintenance Support shall be Seller's
            then current fee for the applicable Software, payable monthly in
            advance. The fee for the first year, if it is not a full calendar
            year, shall be prorated for the number of days remaining in such
            year.

3.    SERVICE LIMITATIONS
      -------------------

            (a)   Maintenance Support Service as described in sections 1 and 2
            above covers malfunctions in Equipment and Software that impair
            service to subscribers, System performance, billing, administration
            or maintenance, except for malfunctions that are: (i) caused by
            deliberate or negligent acts of persons other than Seller (including
            but not limited to those acts or causes listed in Section 13.6 of
            the Acquisition Agreement) or (ii) any other causes external to the
            System. Buyer shall pay Seller's then current rate for any technical
            assistance rendered and the actual cost of labor, freight and
            materials for the repair or replacement, at Buyer's request, of any
            Equipment and Software faults not covered by Maintenance Support.

            (b)   Software Maintenance Support Services will be provided for the
            latest released
                                      -2-
<PAGE>

          version of the Software and the last two (2) previous released version
          of that Software. If Buyer chooses to freeze on a prior released
          version of the Software, Seller may, at its option, provide a quote
          for maintenance service for such Software, require Buyer to bring the
          installed Software up to a supported version, or significantly reduce
          the level of support services. Any loss of System functionality due to
          the inability or unwillingness of Buyer to keep the Software current
          shall be the sole responsibility of and liability of Buyer.

          (c) Seller's performance of its obligations hereunder is dependent
          upon Buyer providing access to the System and to such information and
          facilities as Seller may reasonably require in order to provide the
          Maintenance Support Service.

          (d) Buyer may request the Seller provide on-site technical assistance
          or expert services on matters not covered by Maintenance Support in
          accordance with Article 6 of the Acquisition Agreement. Such services
          will be provided at Seller's then current rate for such services or on
          a time and materials basis, as appropriate.

4.   DISCONTINUATION OF SERVICES BY Seller
     -------------------------------------

     In the event that the Seller intends to discontinue either its Hardware
     Maintenance Support services or its Software Maintenance Support services
     after the ten (10) year periods set forth in paragraphs 3 and 4, above, or
     in either case, as applicable, Seller shall provide Buyer with sufficient
     advance notice of such intention, together with all reasonably necessary
     information, so as to enable Buyer to perform such services itself or
     arrange for them to be performed by a third party.

5.   TERMINATION OF SERVICE
     ----------------------

          (a) Buyer Seller may terminate Maintenance Support for its convenience
          by giving Seller thirty (30) days advance written notice.

          (b) In the event of such termination of Maintenance Support, neither
          party shall have any further obligation to the other with respect to
          Maintenance Support, except that (i) Seller shall refund to Buyer any
          portion of the charge paid by Buyer for Maintenance Support for the
          period subsequent to the effective date of termination, less any
          amounts then due Seller; and (ii) Buyer shall pay Seller for the
          Maintenance Support Services performed prior to the effective date of
          termination.

                                      -3-
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<PAGE>
                             OMNIPOINT CORPORATION
                             ---------------------

                             RESPONSIBILITY MATRIX
                             ---------------------

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                             OMNIPOINT CORPORATION
                             ---------------------

                                       *

                                        
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OMNIPOINT CONTRACT 2/27/96                                          Attachment I

                             OMNIPOINT CORPORATION
                             ---------------------
                                        
                              RADIO NETWORK DESIGN
                              --------------------
                                        
Omnipoint Corporation will be providing providing their own Radio Design.  When
such information has been developed it will be provided to Ericsson Inc.



Ericsson, Inc.-Not for use of disclosure outside Omnipoint except under written
                                   agreement
<PAGE>
- --------------------------------------------------------------------------------
                                                                    ATTACHMENT J
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------


                             OMNIPOINT CORPORATION
                             ---------------------
                                        
                                        
                        ERICSSON CMS 40 ACCEPTANCE TESTS
                        --------------------------------


GENERAL SCOPE
- -------------

SELLER will perform Acceptance Tests to demonstrate that the Equipment and
Software installed by SELLER operate materially with the Specifications and that
the System or System segment is ready for commercial service. Appendix 1
presents a graphic overview of the Systems Implementation and Acceptance Tests
for the Equipment and Software.

SELLER Acceptance Tests are performed in the following areas when Installation
and other related services for Equipment and Software are purchased from SELLER:

 .    Network Element Acceptance
 .    System Acceptance
 .    Commercial Acceptance

1.   NETWORK ELEMENT ACCEPTANCE

     Each standalone Network Element (equipment and software) is tested
     separately and independent from other Network Elements to verify that it
     operates in accordance with the applicable Specification. Network Elements
     will be installed and tested in accordance with applicable provisions of
     the latest version of SELLER's installation and test manual.  An Acceptance
     Certificate will be signed at the completion of this test.  Appendix 2
     lists the Network Element test objects.

     Included in Network Element Acceptance are:

     (a) Network Element integration tests are designed to verify that the
         hardware connections and interfaces between the Network Elements are
         installed and working properly and that network data and the concerned
         traffic data are correct.  Appendix 3 lists the Network Element
         integration test objects.

     (b) Traffic Network tests are designed to verify that different traffic
         cases to and from mobile telephones, as well as handover, locating and
         charging functions are working properly in accordance with the
         Specifications.  Traffic Network tests include (i) Traffic Case Tests
         which are designed to verify that different traffic cases to and from
         mobile telephones, as well as handover, locating and charging functions
         are working property in accordance with the Specifications; and (ii)
         the Radio Network Performance test which is designed to verify that the
         performance of the radio network (e.g., check the cell data, coverage
         and handover on major roads) is in accordance with the Specifications.
         The Radio Network Performance test is only part of the acceptance tests
         procedure when SELLER is responsible for the radio network planning.
         Traffic Network Tests are performed on the agreed minimum part of the
         System required to verify the System's functionality.  Appendix 4 lists
         the Traffic Network test objects.



- --------------------------------------------------------------------------------
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                                       1



<PAGE>
- --------------------------------------------------------------------------------
                                                                    ATTACHMENT J
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------

2.   SYSTEM ACCEPTANCE

     After successful completion of all other Acceptance Tests described
     above, SELLER will demonstrate that a predefined portion of the System
     mutually agreed to the parties parties hereto operates in accordance with
     the Specifications for the entire System.  The System test is performed by
     applying a mutually agreed upon number of tests to a predetermined portion
     of the System in accordance with the applicable provisions of the latest
     version of SELLER's installation and test manuals.  An Acceptance
     Certificate will be signed at the completion of this test.  Appendix 5
     lists the System test objects.  Acceptance of the remainder of the
     standalone Network Elements shall be accepted on a Network Element basis as
     set forth above.

 
3.   COMMERCIAL ACCEPTANCE

     Commercial Acceptance shall take place upon the earlier to occur of (i)
     use of any part of the System In Revenue Service, or (ii) when the System
     or any part thereof, is capable of being placed In Revenue Service (i.e.,
     no service affecting deficiencies exist).

4.   CONDUCT OF ACCEPTANCE TESTS

     (a)  Generally, all tests will be performed as part of the Installation of
          the System and will be performed according to SELLER's standard
          procedures. The following documentation will be provided, as
          appropriate, for each of the Acceptance Tests described above:

          .  Inventory Statement
          .  Test Data Forms (Inst./Demo Checklist/Test Object Lists)
          .  Acceptance Certificates (which are attached hereto)
          .  Exceptions List Report (if needed)
          .  Exceptions List Resolution Certificate (if needed)

     (b)  SELLER shall notify PURCHASER as soon as it knows, but at least ten
          (10) days before, the date on which Acceptance Tests shall be
          conducted and shall provide PURCHASER with a detailed Acceptance Test
          Procedure.  At the first practicable date thereafter, SELLER and
          PURCHASER shall each sign off on any pretest forms provided as part of
          the particular Acceptance Test being conducted.  If PURCHASER or its
          nominee does not attend the Acceptance Tests, SELLER shall proceed
          with the tests and immediately forward the test results to PURCHASER.

     (c)  If, in the performance of Acceptance Tests by SELLER, the Equipment,
          Software or the System, as a whole, comprising the Initial System
          Acceptance System Configuration does not fulfill the requirements of
          the Acceptance Tests, SELLER shall, at its expense, correct the
          defects as soon as practicable.  The Acceptance Tests (or so much of
          them as necessary) shall be recommenced immediately after such
          correction in accordance with this Attachment J.

     (d)  Upon the successful completion of an Acceptance Test conducted by
          SELLER, SELLER shall, if applicable, submit to PURCHASER an Acceptance
          Certificate certifying (i) successful completion of the Acceptance
          Tests, (ii) the Equipment and Software, to that stage completed, have
          been installed in accordance with the requirements of this Agreement,
          subject to resolution of Punch list items, and (iii) that the System
          (or System segment) is ready to be placed In Revenue Service.
          PURCHASER shall acknowledge same by signing the Acceptance Certificate
          prior to the System (or System segment) being placed In Revenue
          Services.  At such time, Punch list items will be documented and
          Equipment, Software or Installation covered by such certificate shall
          be deemed "Accepted" (i.e., "Acceptance" 

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                                                                    ATTACHMENT J
                                                     ACQUISITION AGREEMENT #9107
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          shall have occurred). Items may be added to the Exceptions List by
          PURCHASER up to fifteen (15) days after Acceptance unless such items
          should reasonably have been detected by visual inspection by PURCHASER
          at the time the Exceptions List was initially prepared. Defects in
          components arising after Acceptance that are covered by Article 13 -
          Warranty shall not be considered Punch list items. Upon resolution of
          Punch list items by SELLER, SELLER shall submit to PURCHASER, and
          PURCHASER shall sign, a ceritificate verifying that no further Punch
          list items remain unresolved. In the event of any dispute as to the
          results of any Acceptance Tests, such dispute shall be resolved by a
          Third Party Engineer selected pursuant to Article 23 - Disputes.
          
     (e)  Testing of Equipment and Software purchased as Expansions to the
          Initial Configuration will be conducted in accordance with the
          Acceptance Tests procedure set forth in the order for such Expansions.


          Reference documentation Acceptance Test Procedure and Acceptance Test
          Procedure Appendices EUS/RO/XT-95:148 and EUS/RO/XT:149.
 Rev. 1/22/96

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                                       3
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                                                                    ATTACHMENT J
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------


APPENDIX 1 - MOBILE TELEPHONE SYSTEMS IMPLEMENTATION AND ACCEPTANCE
             BLOCK DIAGRAM

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                                                                    ATTACHMENT J
                                                     ACQUISITION AGREEMENT #9107
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                  APPENDIX 2 - NETWORK ELEMENT TEST CMS 40 R1


                         NETWORK ELEMENT TEST CMS 40 R1

      NETWORK ELEMENT
 
      MSC/VLR          Mobile Switching Center/Visiting Location Register

      MSC/VLR/HLR      Mobile Switching Center/Visiting Location Register/Home
                       Location Register

      HLR              Home Location Register

      BSC              Base Station Controller

      BTS              Base Transceiver Station RBS 2000

      AUC/EIR          Authentication Center Equipment Identity Register

      OSS              Operation and Maintenance System  (See Appendix 2A)

      SOG              Service Order Gateway (See Appendix 2B)

      BgW              Billing Gateway (See Appendix 2C)

      GIWU             GSM Interworking Unit

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                                    NOTICE
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                                                                    ATTACHMENT J
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------


         APPENDIX 2A  - CMS40 OPERATION SUPPORT SYSTEM ACCEPTANCE TESTS


                         CMS40 OPERATION SUPPORT SYSTEM
                                ACCEPTANCE TESTS

                               TEST OBJECT LISTS
                               -----------------

                  Platform Line PLL - Sun Hardware Platform
                  1/1532-3/APA 101 02

                  Platform Line PLL - Common Application  Platform
                  2/1532-4/APA 101 02

                  Platform Line PLL - Fault Management Application
                  2/1532-4/APA 101 02

                  Platform Line PLL - TAP Support Functions
                  2/1532-4/APA 101 02

                  Platform Line PLL - Log Administration
                  2/1532-4/APA 101 02

                  Cellular Network Administration
                  1532-16/AOM 201 02

                  Cellular Network Administration Interface
                  1532-16/AOM 201 02

                  Radio Alarm Handling
                  1532-16/AOM 201 02

                  AUC/EIR Alarm Handling
                  1532-16/AOM 201 02

                  Tellnet External Access
                  1532-16/AOM 201 02

                  Network Administration
                  1532-16/AOM 201 02

                  Radio Network Measurement
                  1532-16/AOM 201 02

                  Radio Network Recording Functions
                  1532-16/AOM 201 02

                  Network Element Software Register
                  1532-16/AOM 201 02

- --------------------------------------------------------------------------------
                                    NOTICE
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- --------------------------------------------------------------------------------
                                       6
<PAGE>
- --------------------------------------------------------------------------------
                                                                    ATTACHMENT J
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------


APPENDIX 2A

Continued



                  BTS Software Management
                  1532-16/AOM 201 02

                  Map Information and Installation Tool
                  1532-16/AOM 201 02

                  Text file Alarm Adaptation Unit
                  1532-16/AOM 201 02

                  MXE Alarm and Command Interface
                  1532-16/AOM 201 02

                  Command Handling - AXE
                  2/1532/AOM 201 02

                  File Handling - AXE
                  2/1532/AOM 201 02

                  Performance Measurement - AXE
                  2/1532/AOM 201 02

                  External Alarm Interface - AXE
                  2/1532/AOM 201 02

- --------------------------------------------------------------------------------
                                    NOTICE
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- --------------------------------------------------------------------------------
                                       7
<PAGE>
- --------------------------------------------------------------------------------
                                                                    ATTACHMENT J
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------


           APPENDIX 2B - CMS 40 SERVICE ORDER GATEWAY ACCEPTANCE TESTS



                                     CMS 40
                             SERVICE ORDER GATEWAY
                                ACCEPTANCE TESTS

                               TEST OBJECT LISTS
                               -----------------
                                        
                  1.  Customer Administration Interface
                      153 21-FAB 760 179

                        Message Syntax

                        Control Messages

                        HLR Subscription Administration

                        HLR IMSI Changeover Administration

                        AUC Subscription Administration

                        EIR Equipment Range Administration

                  2.  Customer Administration Interface

                      1/153 21-FAB 760 179

                        HLR Administration

                        Control Ranges

                        Equipment Handling

                        HLR Subscription Handling

                        Transaction Log

                  3.  Platform Line PLL - Sun Hardware Platform
                      1/1532-3/APA 101 02

- --------------------------------------------------------------------------------
                                    NOTICE
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- --------------------------------------------------------------------------------
                                       8
<PAGE>
- --------------------------------------------------------------------------------
                                                                    ATTACHMENT J
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------


              APPENDIX 2C - CMS 40 BILLING GATEWAY ACCEPTANCE TEST



                                     CMS 40
                                BILLING GATEWAY
                                ACCEPTANCE TEST

                               TEST OBJECT LISTS
                               -----------------

                  Application Builder
                  15321-FAB 102 75

                  Application Software
                  15321-FAB 102 70

- --------------------------------------------------------------------------------
                                    NOTICE
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- --------------------------------------------------------------------------------
                                       9
                                   
<PAGE> 
- --------------------------------------------------------------------------------
                                                                    ATTACHMENT J
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------


                    APPENDIX 3 - INTEGRATION TEST CMS 40 R1

                           INTEGRATION TEST CMS 40 R1

                                        
      TEST TYPE

      MSC other CMS NE

      MSC/PSTN

                  APPENDIX 4 - TRAFFIC NETWORK TEST CMS 40 R1

                         TRAFFIC NETWORK TEST CMS 40 R1

      TEST TYPE

      Traffic Case Test

      Radio Network
      Performance Test

                       APPENDIX 5 - SYSTEM TEST CMS 40 R1

                             SYSTEM TEST CMS 40 R1

      TEST TYPE

      MSC/VLR/HLR
      System Test

      BSC/BTS
      System Test

- --------------------------------------------------------------------------------
                                    NOTICE
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- --------------------------------------------------------------------------------
                                      10
<PAGE>

- --------------------------------------------------------------------------------
                                                                    ATTACHMENT J
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------
 
                             OMNIPOINT CORPORATION
                             ---------------------

                          ACCEPTANCE TEST PROCEDURES
                          --------------------------


In witness hereof, all parties signed below are in agreement to the enclosed 
Attachment J, Revision C, dated February 14, 1996.


ERICSSON INC.                                    OMNIPOINT CORPORATION

/s/ Lars Skoglund                                /s/ Curt Gervelis
- ----------------------------------               -------------------------------
Lars Skoglund                                    Curt Gervelis
Project Manager                                  Network Engineer


Both parties agree that customer has the right to submit additional test plans 
to be included in the acceptance procedures.  Vendor will review & comment as to
which sections can be included and if not accepted documented why it is not.
- --------------------------------------------------------------------------------
                                    NOTICE
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- --------------------------------------------------------------------------------
<PAGE>
 
ERICSSON


                                               AXE SWITCH ACCEPTANCE CERTIFICATE
================================================================================


Customer Name:                                                  Date:
              --------------------------------------------------     -----------

Site Location/Number:
                     -----------------------------------------------------------

Project Description:
                    ------------------------------------------------------------

Ericsson PIO Number(s):
                       ---------------------------------------------------------

Customer P.O. Number(s):
                        --------------------------------------------------------

The above referenced Switch project(s) has/have passed all applicable Acceptance
tests, (ii) has/have been installed properly, subject to resolution of
outstanding punch list items, and (iii) is ready to be placed in revenue
service.

Any discrepancies are specified on the following Punch List Report or
Attachment(s):

SYSTEM ACCEPTANCE (SYSTEM READY FOR SERVICE)

[_] Not Applicable      [_] No Discrepancies

[_] Discrepancies - Qty.                  Date Confirmed:
                        -----------                      ------------

   1. FEATURE PROFILE VERIFICATION (See Profile List)

   [_] Not Applicable   [_] No Discrepancies

   [_] Discrepancies - Qty.                  Date Confirmed:
                           -----------                      ------------


   2. CALL DEMONSTRATION TESTS (Subscriber Features & Routing)

   [_] Not Applicable   [_] No Discrepancies  

   [_] Discrepancies - Qty.                  Date Confirmed:
                           -----------                      ------------

   3. OTHER (                                                                  )
             ------------------------------------------------------------------
           
   [_] Not Applicable   [_] No Discrepancies  

   [_] Discrepancies - Qty.                  Date Confirmed:
                           -----------                      ------------

NETWORK ELEMENT ACCEPTANCE (NODE/S READY)

[_] Not Applicable      [_] No Discrepancies 

[_] Discrepancies - Qty.                  Date Confirmed:
                        -----------                      ------------   
   
   1. APZ/APT DEMONSTRATION TESTS (AXE)

   [_] Not Applicable   [_] No Discrepancies  

   [_] Discrepancies - Qty.                  Date Confirmed:
                           -----------                      ------------

   2. MATERIAL INVENTORY (Floor Plan Spec., Spares, Documentation, etc.)

   [_] Not Applicable   [_] No Discrepancies    

   [_] Discrepancies - Qty.                  Date Confirmed:
                           -----------                      ------------
 
   3. INSTALLATION & TEST COMPLETE (See Check List)

   [_] Not Applicable   [_] No Discrepancies  

   [_] Discrepancies - Qty.                  Date Confirmed:
                           -----------                      ------------

   4. OTHER (                                                                  )
             ------------------------------------------------------------------

   [_] Not Applicable   [_] No Discrepancies  

   [_] Discrepancies - Qty.                  Date Confirmed:
                           -----------                      ------------

      CUSTOMER REPRESENTATIVE                   ERICSSON REPRESENTATIVE

Signature:                                Signature:   
          -------------------------                 ----------------------------

Printed Name:                             Printed Name:
             ----------------------                    -------------------------

Title:                                    Title:
      -----------------------------             --------------------------------

Date:                                     Date:
     ------------------------------            ---------------------------------

================================================================================
DISTRIBUTION: CUSTOMER, REGIONAL OPERATIONS MANAGER, PROJECT MANAGER, SWITCH
OPERATIONS
<PAGE>
 

[LOGO OF ERICSSON]
                                                                       No. 4201

                                                               PUNCH LIST REPORT
================================================================================

Customer Name:                             Date:
               -------------------------         ------------------
Site Location/Number:
                      ---------------------------------------------
Project Description:
                     ----------------------------------------------
Ericsson PIO Number(s):
                        -------------------------------------------
Customer P.O. Number(s):
                         ------------------------------------------

The following is a final list of discrepancies for this project as identified by
a joint inspection with the customer and Ericsson.

<TABLE> 
<CAPTION>
                                        Correction      Ericsson     Customer
No.  Discrepancy or Action Required        Date         Initial      Initial
- ---  ------------------------------        ----         -------      -------
<C>  <S>                                <C>             <C>          <C>  
                                                                    
1.                                                                  
- --   ------------------------------     -------         -------      -------
2.                                                                  
- --   ------------------------------     -------         -------      -------
3.                                                                  
- --   ------------------------------     -------         -------      -------
4.                                                                  
- --   ------------------------------     -------         -------      -------
5.                                                                  
- --   ------------------------------     -------         -------      -------
6.                                                                  
- --   ------------------------------     -------         -------      -------
7.                                                                  
- --   ------------------------------     -------         -------      -------
8.                                                                  
- --   ------------------------------     -------         -------      -------
9.                                                                  
- --   ------------------------------     -------         -------      -------
10.                                                                 
- ---  ------------------------------     -------         -------      -------
11.                                                                 
- ---  ------------------------------     -------         -------      -------
12.                                                                 
- ---  ------------------------------     -------         -------      -------
13.                                                                 
- ---  ------------------------------     -------         -------      -------
14.                                                                 
- ---  ------------------------------     -------         -------      -------
15.                                                                 
- ---  ------------------------------     -------         -------      -------
16.                                                                 
- ---  ------------------------------     -------         -------      -------
17.                                                                 
- ---  ------------------------------     -------         -------      -------
18.                                                                 
- ---  ------------------------------     -------         -------      -------
19.                                                                 
- ---  ------------------------------     -------         -------      -------
20.                                                                 
- ---  ------------------------------     -------         -------      -------

================================================================================
</TABLE> 
DISTRIBUTION: CUSTOMER, REGIONAL OPERATIONS MANAGER, PROJECT MANAGER, SWITCH
OPERATIONS
                                                               FORM EUS-PLR-0195
<PAGE>
 

[LOGO OF ERICSSON]
                                                                       No. 4251

                                               PUNCH LIST RESOLUTION CERTIFICATE
================================================================================

Customer Name:                                          Date:
               ---------------------------------------        ------------------
Site Location/Number:
                      ----------------------------------------------------------
Project Description:
                     -----------------------------------------------------------
Ericsson PIO Number(s):
                        --------------------------------------------------------




All outstanding punch list items for the above referenced project have been
resolved to the satisfaction of the customer.


                              [_]  See attachments (if any)



         CUSTOMER REPRESENTATIVE                 ERICSSON REPRESENTATIVE

Signature:                              Signature:
           --------------------------              -----------------------------
Printed Name:                           Printed Name:
              -----------------------                 --------------------------
Title:                                  Title:
       ------------------------------          ---------------------------------
Date:                                   Date: 
      -------------------------------         ----------------------------------

================================================================================
DISTRIBUTION: CUSTOMER, REGIONAL OPERATIONS MANAGER, PROJECT MANAGER, SWITCH
OPERATIONS
<PAGE>


- -------------------------------------------------------------------------
                                                             ATTACHMENT K
                                              ACQUISITION AGREEMENT #9107
=========================================================================

<TABLE>
<CAPTION>
LIST OF CMS 40 R1 FEATURES IN MSC/VLR AND HLR

- -------------------------------------------------------------------------
FEATURE                   TITLE                    BASIC  OPTION   NODE
- -------------------------------------------------------------------------
<C>      <S>                                       <C>    <C>     <C>
1.2      Basic Traffic Control in MSC/VLR            y            MSC/VLR
- -------------------------------------------------------------------------
4.1      Roaming in MSC/VLR                          y            MSC/VLR
- -------------------------------------------------------------------------
5.1      Basic Mobility Handling in HLR              y              HLR
- -------------------------------------------------------------------------
6.1      Call Routing in MSC/VLR                     y            MSC/VLR
- -------------------------------------------------------------------------
7.1      IMSI Attach/Detach in MSC/VLR               y            MSC/VLR
- -------------------------------------------------------------------------
8.2      Basic Mobile Switching Service              y            MSC/VLR
- -------------------------------------------------------------------------
9.1      DTMF Signaling in MSC/VLR                   y            MSC/VLR
- -------------------------------------------------------------------------
11.3     Call Forwarding Services in MSC/VLR                y     MSC/VLR
- -------------------------------------------------------------------------
12.2     Call Forwarding Services in HLR                    y       HLR
- -------------------------------------------------------------------------
13.1     Call Barring Services in MSC/VLR                   y     MSC/VLR
- -------------------------------------------------------------------------
14.2     Call Barring Services in HLR                       y       HLR
- -------------------------------------------------------------------------
15.4     Advice of Charge in MSC/VLR                        y     MSC/VLR
- -------------------------------------------------------------------------
16.1     Advice of Charge in HLR                            y       HLR
- -------------------------------------------------------------------------
17.4     Handover in MSC/VLR                         y            MSC/VLR
- -------------------------------------------------------------------------
18.3     Basic Security Features in MSC/VLR          y            MSC/VLR
- -------------------------------------------------------------------------
19.4     Toll Ticketing                              y            MSC/VLR
- -------------------------------------------------------------------------
20.1     Accounting                                         y     MSC/VLR
- -------------------------------------------------------------------------
23.1     Service Quality                                    y     MSC/VLR
- -------------------------------------------------------------------------
24.1     Administration of Data in MSC/VLR           y            MSC/VLR
- -------------------------------------------------------------------------
26.1     Code Answer                                        y     MSC/VLR
- -------------------------------------------------------------------------
27.1     Long Term Monitoring                               y     MSC/VLR
- -------------------------------------------------------------------------
33.2     Performance Management in MSC/VLR                  y     MSC/VLR
- -------------------------------------------------------------------------
34.2     Performance Management in HLR                      y       HLR
- -------------------------------------------------------------------------
35.2     Handling of Reset in MSC/VLR                y            MSC/VLR
- -------------------------------------------------------------------------
36.2     Tracing                                     y            MSC/VLR
- -------------------------------------------------------------------------
38.3     Basic Subscription Handling                 y              HLR
- -------------------------------------------------------------------------
42.1     Activity Supervision                        y            MSC/VLR
- -------------------------------------------------------------------------
50.3     Mobile Application Part in MSC/VLR          y            MSC/VLR
- -------------------------------------------------------------------------
51.3     Mobile Application Part in HLR              y              HLR
- -------------------------------------------------------------------------
52.3     Base Station Application Part in MSC/VLR    y            MSC/VLR
- -------------------------------------------------------------------------
54.1     Basic Network Traffic Management            y            MSC/VLR
- -------------------------------------------------------------------------
55.1     Announcement of ringtone time out           y            MSC/VLR
- -------------------------------------------------------------------------
57.1     Measurement of Network Performance          y            MSC/VLR
- -------------------------------------------------------------------------
61.1     Group Switch Control in MSC/VLR             y            MSC/VLR
- -------------------------------------------------------------------------
63.1     National Roaming                                   y     MSC/VLR
- -------------------------------------------------------------------------
64.3     Data Services Platform                             y     MSC/VLR
- -------------------------------------------------------------------------
65.2     Modem Services and Basic PAD                       y     MSC/VLR
- -------------------------------------------------------------------------
66.2     Short Message Services in MSC/VLR                  y     MSC/VLR
- -------------------------------------------------------------------------
67.1     Short Message Services in HLR                      y       HLR
- -------------------------------------------------------------------------
68.2     Fax Service                                        y     MSC/VLR
- -------------------------------------------------------------------------
69.2     Call Waiting and Call Hold                         y     MSC/VLR
- -------------------------------------------------------------------------
</TABLE>


==========================================================================
                                   NOTICE
NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- --------------------------------------------------------------------------
                                       3
<PAGE>
                                                                    ATTACHMENT K
                                                     ACQUISITION AGREEMENT #9107

    LIST OF CMS 40 R1 FEATURES IN MSC/VLR AND HLR (CONT.)
<TABLE>
<CAPTION>
 
FEATURE                   TITLE                    BASIC  OPTION   NODE
- -------------------------------------------------------------------------
<C>      <S>                                       <C>    <C>     <C>
   70.1  IN Services Access                               [X]     MSC/VLR
- -------------------------------------------------------------------------
   71.1  Immediate Call Itemization                       [X]     MSC/VLR
- -------------------------------------------------------------------------
   72.1  Single Personal Number in HLR                    [X]       HLR
- -------------------------------------------------------------------------
   73.1  Single Personal Number in MSC/VLR                [X]     MSC/VLR
- -------------------------------------------------------------------------
   77.1  Selective Authentication                   [X]           MSC/VLR
- -------------------------------------------------------------------------
   79.2  Equipment Identity Control in MSC/VLR      [X]           MSC/VLR
- -------------------------------------------------------------------------
   81.1  Handling of MSISDN in MSC/VLR              [X]           MSC/VLR
- -------------------------------------------------------------------------
   82.1  Blue MTP                                   [X]           MSC/VLR
- -------------------------------------------------------------------------
   84.1  MAP-based interface HLR-AUC                       [X]      HLR
- -------------------------------------------------------------------------
   85.1  MAP-based interface MSC/VLR-EIR                   [X]    MSC/VLR
- -------------------------------------------------------------------------
   86.2  MAP-based interface MSC/VLR-SMS-C                 [X]    MSC/VLR
- -------------------------------------------------------------------------
   88.1  Basic Packet Service (BS 32-34)                   [X]    MSC/VLR
- -------------------------------------------------------------------------
   90.1  Multi Party Service                               [X]    MSC/VLR
- -------------------------------------------------------------------------
   93.1  Operator-Determined Barring in MSC/VLR            [X]    MSC/VLR
- -------------------------------------------------------------------------
   94.1  Operator-Determined Barring in HLR                [X]      HLR
- -------------------------------------------------------------------------
   95.1  Dual Numbering in MSC/VLR                         [X]    MSC/VLR
- -------------------------------------------------------------------------
   96.1  Suppression of Announcement at Diverted           [X]      HLR
         Call
- -------------------------------------------------------------------------
   97.1  Announcement at Disconnection (Post               [X]    MSC/VLR
         Answer)
- -------------------------------------------------------------------------
   99.1  Routing of Call from a Grey-listed IMEI           [X]    MSC/VLR
- -------------------------------------------------------------------------
  101.1  Subscription Procedure Charging                   [X]    MSC/VLR
- -------------------------------------------------------------------------
  102.1  Direct File Output                                [X]    MSC/VLR
- -------------------------------------------------------------------------
  103.1  IMSI Changeover                                   [X]      HLR
- -------------------------------------------------------------------------
  104.1  File Output for Subscriber Data in HLR            [X]      HLR
- -------------------------------------------------------------------------
  105.2  Remote Control Equipment                          [X]    MSC/VLR
- -------------------------------------------------------------------------
  107.1  Blue ISUP                                  [X]           MSC/VLR
- -------------------------------------------------------------------------
  108.1  File Transfer Access and Management               [X]    MSC/VLR
- -------------------------------------------------------------------------
  109.1  More Powerful SP (CP-5) in MSC/VLR         [X]           MSC/VLR
- -------------------------------------------------------------------------
  110.2  Basic Call Handling in HLR                 [X]             HLR
- -------------------------------------------------------------------------
  111.1  Basic Operation and Maintenance            [X]             HLR
- -------------------------------------------------------------------------
  112.1  Charging File Management                   [X]           MSC/VLR
- -------------------------------------------------------------------------
  113.1  IN Subscription                                   [X]      HLR
- -------------------------------------------------------------------------
  114.1  Immediate Call Itemization Subscription           [X]      HLR
- -------------------------------------------------------------------------
  115.1  Dual Numbering in HLR                             [X]      HLR
- -------------------------------------------------------------------------
  119.1  General Performance Management in                 [X]    MSC/VLR
         MSC/VLR
- -------------------------------------------------------------------------
  122.1  Magnetic Transfer Group (MTG)                     [X]    MSC/VLR
- -------------------------------------------------------------------------
  129.1  Geographical Differentiated Charging              [X]    MSC/VLR
- -------------------------------------------------------------------------
  131.1  Definition of Geographical Locations       [X]           MSC/VLR
- -------------------------------------------------------------------------
  132.1  Provision of Location Numbers                     [X]    MSC/VLR
- -------------------------------------------------------------------------
  135.1  Administration of ZoneCodes                       [X]      HLR
- -------------------------------------------------------------------------
  138.1  Local Subscription                                [X]    MSC/VLR
- -------------------------------------------------------------------------
  139.1  Regional Subscription                             [X]    MSC/VLR
- -------------------------------------------------------------------------
</TABLE>
                                    NOTICE
- ----------------------------------------------------------------------------
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
                                       4                                   
                                        
<PAGE>
- --------------------------------------------------------------------------------
                                                                    ATTACHMENT K
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------
             LIST OF CMS 40 R1 FEATURES IN MSC/VLR AND HLR (CONT.)
<TABLE>
<CAPTION>
 
FEATURE                   TITLE                    BASIC  OPTION   NODE
- -------------------------------------------------------------------------
<C>      <S>                                       <C>    <C>     <C>
  142.1  Telephony Subscription                    [X]              HLR
- -------------------------------------------------------------------------
  143.1  Modem Services and Basic PAD                     [X]       HLR
         Subscription
- -------------------------------------------------------------------------
  144.1  Fax Service Subscription                         [X]       HLR
- -------------------------------------------------------------------------
  145.1  Call Waiting and Call Hold Subscription          [X]       HLR
- -------------------------------------------------------------------------
  146.1  Basic Packet Service Subscription                [X]       HLR
- -------------------------------------------------------------------------
  147.1  Multi Party Service Subscription                 [X]       HLR
- -------------------------------------------------------------------------
  148.1  Calling Line Identification Services             [X]       HLR
         Subscription
- -------------------------------------------------------------------------
  150.2  Authentication Data Handling              [X]              HLR
- -------------------------------------------------------------------------
  153.1  Alternate Speech/Fax Subscription in             [X]     MSC/VLR
         MSC/VLR
- -------------------------------------------------------------------------
  154.1  Alternate Speech/Fax Subscription in HLR         [X]       HLR
- -------------------------------------------------------------------------
  156.1  Roaming Restriction per HLR               [X]              HLR
- -------------------------------------------------------------------------
  157.1  Roaming Restriction per Subscription             [X]     MSC/VLR
- -------------------------------------------------------------------------
  158.1  Load Management                           [X]            MSC/VLR
- -------------------------------------------------------------------------
  159.1  Test and Fault Localization               [X]            MSC/VLR
- -------------------------------------------------------------------------
  160.1  Fault Isolation                           [X]            MSC/VLR
- -------------------------------------------------------------------------
  161.1  Operation and Maintenance of the Group    [X]            MSC/VLR
         Switch
- -------------------------------------------------------------------------
  162.1  Supervision                               [X]            MSC/VLR
- -------------------------------------------------------------------------
  164.2  Software File Congestion Supervision             [X]     MSC/VLR
- -------------------------------------------------------------------------
  171.1  Interactive Announcement Machine                 [X]     MSC/VLR
         EriVoice 500
- -------------------------------------------------------------------------
  185.1  Ericsson Echo Canceler                           [X]     MSC/VLR
- -------------------------------------------------------------------------
  186.1  Optical Disc Control                             [X]       HLR
- -------------------------------------------------------------------------
  188.1  GSM Phase 2 Signaling for Suppementary    [X]            MSC/VLR
         Services
- -------------------------------------------------------------------------
  190.2  Sema Group - AUC                                 [X]       AUC
- -------------------------------------------------------------------------
  191.2  Sema Group - EIR                                 [X]       EIR
- -------------------------------------------------------------------------
  266.1  White TCAP-ANSI in HLR                    [X]              HLR
- -------------------------------------------------------------------------
  278.1  Operation and Maintenance of R1                  [X]     MSC/VLR
         Signaling - ANSI
- -------------------------------------------------------------------------
  298.1  White TCAP-ANSI in MSC/VLR                [X]            MSC/VLR
- -------------------------------------------------------------------------
  759.1  More Powerful SP (CP-5) in HLR            [X]              HLR
- -------------------------------------------------------------------------
  762.1  APZ 212 11 Control in HLR                 [X]              HLR
- -------------------------------------------------------------------------
  763.1  APZ 212 11 Control in MSC/VLR             [X]            MSC/VLR
- -------------------------------------------------------------------------
  792.1  AXE 10/IOG 11 Interface to OSS in                [X]     MSC/VLR
         MSC/VLR
- -------------------------------------------------------------------------
  793.1  AXE 10/IOG 11 Interface to OSS in HLR            [X]       HLR
- -------------------------------------------------------------------------
  798.3  Cell Traffic Recording                    [X]            MSC/VLR
- -------------------------------------------------------------------------
  826.1  Back-up in Main Store in MSC/VLR                 [X]     MSC/VLR
- -------------------------------------------------------------------------
  827.1  Back-up in Main Store in HLR                     [X]       HLR
- -------------------------------------------------------------------------
  835.1  APZ 212 20 Control in HLR                        [X]       HLR
- -------------------------------------------------------------------------
  901.1  APZ 212 20 Control in MSC/VLR                    [X]     MSC/VLR
- -------------------------------------------------------------------------
 1069.1  ANSI ISUP                                 [X]            MSC/VLR
- -------------------------------------------------------------------------
 1071.1  Equal Access in MSC/VLR                   [X]            MSC/VLR
- -------------------------------------------------------------------------
 1072.1  Equal Access in HLR                       [X]              HLR
- -------------------------------------------------------------------------
</TABLE>


- --------------------------------------------------------------------------------
                                    NOTICE
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- --------------------------------------------------------------------------------
                                       5                                        
                                      
<PAGE>
- --------------------------------------------------------------------------------
                                                                    ATTACHMENT K
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------

    LIST OF CMS 40 R1 FEATURES IN MSC/VLR AND HLR (CONT.)
<TABLE>
<CAPTION>
 
FEATURE                   TITLE                    BASIC  OPTION   NODE
- -------------------------------------------------------------------------
<C>      <S>                                       <C>    <C>     <C>
 1073.1  Feature Group B and D                     [X]            MSC/VLR
- -------------------------------------------------------------------------
 1074.1  Emergency Number 911                      [X]            MSC/VLR
- -------------------------------------------------------------------------
 1076.1  Transmission Maintenance of T1            [X]            MSC/VLR
- -------------------------------------------------------------------------
 1078.1  ANSI MTP in HLR                           [X]              HLR
- -------------------------------------------------------------------------
 1079.1  ANSI MTP in MSC/VLR                       [X]            MSC/VLR
- -------------------------------------------------------------------------
 1080.1  Signaling Connection Control Part in HLR  [X]              HLR
- -------------------------------------------------------------------------
 1083.1  Signaling Connection Control Part in      [X]            MSC/VLR
         MSC/VLR
- -------------------------------------------------------------------------
 1085.1  SS7 Supervision in MSC/VLR                       [X]     MSC/VLR
- -------------------------------------------------------------------------
 1086.1  SS7 Performance Management in MSC/VLR            [X]     MSC/VLR
- -------------------------------------------------------------------------
 1087.1  R1 Signaling                              [X]            MSC/VLR
- -------------------------------------------------------------------------
 1088.1  SS7 Performance Management in HLR                [X]       HLR
- -------------------------------------------------------------------------
 1089.1  SS7 Supervision in HLR                           [X]       HLR
- -------------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------
                                    NOTICE
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- --------------------------------------------------------------------------------
                                       6                                        
                                      
<PAGE>                                                                
- ----------------------------------------------------------------------------
                                                                ATTACHMENT K 
                                                 ACQUISITION AGREEMENT #9107
============================================================================
LIST OF CMS 40 R2 FEATURES IN MSC/VLR, HLR, AUC, AND EIR
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------
  NEW
  FEATURE                    TITLE                     BASIC  OPTION   NODE
- ---------------------------------------------------------------------------
<C>       <S>                                          <C>    <C>   <C>
  3.1     Transmission Performance Supervision of               y   MSC/VLR
          T1 Trunks with Superframe or Extended
          Superframe
- ----------------------------------------------------------------------------
  31.1    Mobile Subscriber Purging                      y          MSC/VLR
- ----------------------------------------------------------------------------
  120.1   ANSI ISUP2                                     y          MSC/VLR
- ----------------------------------------------------------------------------
  177.1   Unstructured Supplementary Services                   y   MSC/VLR
          Data in MSC/VLR
- ----------------------------------------------------------------------------
  178.1   Unstructured Supplementary Services                   y     HLR
          Data in HLR
- ----------------------------------------------------------------------------
  222.1   Support of Multiple Speech Coders                     y   MSC/VLR
- ----------------------------------------------------------------------------
  1054.1  Mobile Subscriber Purging                      y            HLR
- ----------------------------------------------------------------------------
  1115.1  Unstructured Supplementary Services                   y     HLR
          Data to external node
- ----------------------------------------------------------------------------
  1116.1  Default Call Forwarding                               y     HLR
- ----------------------------------------------------------------------------
  1117.1  Mobile Subscriber priority level for                  y   MSC/VLR
          Channel Allocation in MSC/VLR
- ----------------------------------------------------------------------------
  1123.1  Mobile Subscriber priority level for                  y     HLR
          Channel Allocation in HLR
- ----------------------------------------------------------------------------
  1131.1  Enhanced IMEI check                                   y   MSC/VLR
- ----------------------------------------------------------------------------
  1132.1  Release of Sequential Events (FORLOPP)         y          MSC/VLR
- ----------------------------------------------------------------------------
  1140.1  Monitoring of Call Forwarding                         y     HLR
          Registrations
- ----------------------------------------------------------------------------
  1155.1  Circuit Pool Handling                                 y   MSC/VLR
- ----------------------------------------------------------------------------
  1157.1  Indication of Mobile Tariff Area to                   y   MSC/VLR
          Mobile Subscriber
          (Home Zone Charging)
- ----------------------------------------------------------------------------
  1159.1  Supervision and disconnection of long                 y   MSC/VLR
          duration calls
- ---------------------------------------------------------------------------
  ENHANCED
  FEATURE TITLE                                        BASIC  OPTION   NODE
- ---------------------------------------------------------------------------
  14.3    Call Barring Services                                 y     HLR
- ---------------------------------------------------------------------------
  50.4    Mobile Application Part in MSC/VLR             y          MSC/VLR
- ---------------------------------------------------------------------------
  51.4    Mobile Application Part in HLR                 y            HLR
- ---------------------------------------------------------------------------
  91.2    Calling Line Identification Services                  y   MSC/VLR
- ---------------------------------------------------------------------------
  94.2    Operator Determined Barring                           y     HLR
- ---------------------------------------------------------------------------
  104.2   Enhanced file output of Subscriber Data        y            HLR
          from HLR and command initiated sending
          of resets to VLR
- ---------------------------------------------------------------------------
  105.3   Remote Control Equipment                              y   MSC/VLR
- ---------------------------------------------------------------------------
  164.4   Software File Congestion Supervision                  y   MSC/VLR
- ---------------------------------------------------------------------------
  184.1   Interactive Announcement Machine                      y   MSC/VLR
          EriVoice 700
- ---------------------------------------------------------------------------
  190.3   Sema Group - AUC                                      y     AUC
- ---------------------------------------------------------------------------
  191.3   Sema Group - EIR                                      y     EIR
- ---------------------------------------------------------------------------
</TABLE>

===========================================================================
                                  NOTICE
NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- ---------------------------------------------------------------------------
                                       7
<PAGE>
- --------------------------------------------------------------------------------
                                                                    ATTACHMENT K
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------

LIST OF CMS 40 R2 FEATURES IN BSC

<TABLE>
<CAPTION>
 
NEW
FEATURE   TITLE                                              BASIC  OPTION  NODE
- --------------------------------------------------------------------------------
<C>                             <S>                          <C>    <C>     <C>
  37.1    Selective Restart                                  [X]            BSC
- --------------------------------------------------------------------------------
  59.1    Transceiver Handler Load Distribution                     [X]     BSC
- --------------------------------------------------------------------------------
  87.1    Support of 1020 Transceivers in the BSC                   [X]     BSC
- --------------------------------------------------------------------------------
  117.1   Flexible Channel Allocation                        [X]            BSC
- --------------------------------------------------------------------------------
  165.1   RBS 2000 Digital Path Supervision                  [X]            BSC
- --------------------------------------------------------------------------------
  195.1   Alarm Coordination                                 [X]            BSC
- --------------------------------------------------------------------------------
  197.1   Alarm Suppression                                  [X]            BSC
- --------------------------------------------------------------------------------
  198.1   Automatic Recovery at Frequency Hopping                   [X]     BSC
- --------------------------------------------------------------------------------
  904.1   Double BCCH Allocation Lists                              [X]     BSC
- --------------------------------------------------------------------------------
  909.1   Idle Channel Measurement                                  [X]     BSC
- --------------------------------------------------------------------------------
  911.1   Cell Load Sharing                                         [X]     BSC
- --------------------------------------------------------------------------------
  913.1   Immediate Assignment on Traffic Channel                   [X]     BSC
- --------------------------------------------------------------------------------
  915.1   Channel Administration                             [X]            BSC
- --------------------------------------------------------------------------------
  923.1   Differential Channel Allocation                           [X]     BSC
- --------------------------------------------------------------------------------
  ENHANCED
  FEATURE                         TITLE                      BASIC  OPTION  NODE
- --------------------------------------------------------------------------------
  260.3   Dynamic Mobile Station Power Control                      [X]     BSC
- --------------------------------------------------------------------------------
  910.2   Dynamic BTS Power Control                                 [X]     BSC
- --------------------------------------------------------------------------------
</TABLE> 

- --------------------------------------------------------------------------------
                                    NOTICE
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- --------------------------------------------------------------------------------
                                       8                                        
                                                                       
<PAGE>


- --------------------------------------------------------------------------------
                                                                    ATTACHMENT K
                                                     ACQUISITION AGREEMENT #9107
================================================================================
<TABLE>
<CAPTION>
LIST OF CMS 40 R2 FEATURES IN OSS AND BGw

- --------------------------------------------------------------------------------
NEW
FEATURE       TITLE                                          BASIC  OPTION  NODE
- --------------------------------------------------------------------------------
<C>           <S>                                            <C>    <C>     <C>
2.1           Statistical Reports, Basic                              y     OSS
              Package
- --------------------------------------------------------------------------------
10.1          XM, Operations Procedure                                y     OSS
              Support
- --------------------------------------------------------------------------------
22.1          XM, Log Book                                            y     OSS
- --------------------------------------------------------------------------------
29.1          FM Alarm Log Analysis                                   y     OSS
- --------------------------------------------------------------------------------
30.1          XM, Integrated Document                                 y     OSS
              Tool
- --------------------------------------------------------------------------------
39.1          DXX Alarm Interface                                     y     OSS
- --------------------------------------------------------------------------------
98.1          BTS Alarm Management                                    y     OSS
- --------------------------------------------------------------------------------
134.1         Application Builder                              y            BGw
- --------------------------------------------------------------------------------
196.1         Specified Alarm Interface                               y     OSS
- --------------------------------------------------------------------------------
292.1         TMOS Toolbox                                     y            OSS
- --------------------------------------------------------------------------------
475.1         BTS Hardware Management                                 y     OSS
- --------------------------------------------------------------------------------
476.1         BTS Configuration                                y            OSS
- --------------------------------------------------------------------------------
480.1         AXE 10 Software Management                       y            OSS
- --------------------------------------------------------------------------------
ENHANCED
FEATURE       TITLE                                          BASIC  OPTION  NODE
- --------------------------------------------------------------------------------
405.6         Cellular Network                                 y            OSS
              Administration
- --------------------------------------------------------------------------------
406.3         XM, Fault Management                             y            OSS
- --------------------------------------------------------------------------------
408.3         XM, Traffic Measurement                          y            OSS
              Tool
- --------------------------------------------------------------------------------
409.4         XM, Traffic Measurement                          y            OSS
              for AXE 10
- --------------------------------------------------------------------------------
412.4         Radio Network Measurement                        y            OSS
              Functions
- --------------------------------------------------------------------------------
413.4         Radio Network Recording                          y            OSS
              Functions
- --------------------------------------------------------------------------------
417.4         Cellular Network                                 y            OSS
              Administration Interface
- --------------------------------------------------------------------------------
418.2         BTS Software Management                          y            OSS
- --------------------------------------------------------------------------------
420.3         Basic OSS Administration                         y            OSS
- --------------------------------------------------------------------------------
421.2         Cellular Network Activity                        y            OSS
              Manager
- --------------------------------------------------------------------------------
439.3         Database                                         y            OSS
- --------------------------------------------------------------------------------
440.3         Security                                         y            OSS
- --------------------------------------------------------------------------------
</TABLE>


================================================================================
                                    NOTICE
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
- --------------------------------------------------------------------------------
                                       9
<PAGE>
                                 AGREEMENT 9107
                         OMNIPOINT COMMUNICATIONS INC.
                                  ATTACHMENT L
                           ORDER CANCELLATION POLICY
                           -------------------------

Listed below are specific charges to be assessed to Buyer that represent the
reasonable, non-recoverable costs expected to be incurred by Ericsson prior to,
or in connection with, the cancellation of an order, including, where
applicable, labor charges of Ericsson personnel, reasonable restocking charges,
and shipping charges.

RBS EQUIPMENT (SUPPLIER - ERICSSON)

Situation                                   Cancellation Penalty Percentage
- -------------------------------------------------------------------------------

 .  Order is canceled before shipment
   to requested customer site.                  5% of order value

 .  Order is canceled after shipment
   to requested customer site but
   before ordered equipment is installed.      15% of order value

 .  Custom Order* (i.e., cable
   construction) canceled before
   manufacturing has commenced on
   that portion of the order.                   5% of order value

 .  Custom Order* (i.e., cable
   construction) canceled after
   manufacturing has commenced on                                             
   that portion of the order.                 100% of the value of the portion
                                              of the order for which     
                                              manufacturing has commenced

*    Custom orders: If, for example, 10 custom cables were ordered but
manufacturing has commenced on only 3 cables, a 100% charge will be levied
against 3 cables and a 5% charge will be levied against the remaining seven of
the order.

                                   -1-
<PAGE>

SWITCH EQUIPMENT (SUPPLIER - ERICSSON)

Switch equipment refers to any AXE switching equipment component order. Switch
equipment specifically excludes the ordering of an entire switch (e.g., Mini,
211, 212).

Situation                                   Cancellation Penalty Percentage
- --------------------------------------------------------------------------------

 .  Order is canceled before shipment
   to requested customer site.                   5% of order value

 .  Order is canceled after shipment
   to requested customer site but before
   installation of switch equipment.            15% of order value

SOFTWARE FEATURES

Situation                                   Cancellation Penalty Percentage
- --------------------------------------------------------------------------------

 .  Order is canceled before
   application engineering
   (i.e., station parameters or
   data transcription) has commenced.            5% of software order value

 .  Order is canceled after application 
   engineering (i.e., station parameters
   or data transcription) has commenced.        10% of software order value

NOTE: All switch hardware associated with the software features is subject to
the cancellation charge listed for Switch Equipment.

                                      -2-
<PAGE>

DOMESTIC SUPPLIERS OTHER THAN ERICSSON

Situation                                            Cancellation Policy
- --------------------------------------------------------------------------------

 .  Ericsson orders materials from a
   domestic supplier and the material
   CAN be resold by the domestic supplier
   to Ericsson or another vendor.                  25% of order value

 .  Ericsson orders materials from a
   domestic supplier and the material
   CANNOT be resold by the domestic
   supplier to Ericsson or another
   vendor (i.e., specifically measured
   coax cable for an antenna run).                100% of order value - and such
                                                  material will be delivered to
                                                  Buyer**


** In essence, such orders are noncancelable.

                                      -3-
<PAGE>

                        *CONFIDENTIAL INFORMATION;                ATTACHMENT M-1
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       1
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       2

<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       3
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       4
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       5
<PAGE>
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       6 

<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       7
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       8
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       9
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       10
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       11
<PAGE>
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                      12 

<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       13
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       14
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       15
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       16
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       17
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       18
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       19
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       20
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;               ATTACHMENT M-2
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       1

<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       1
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       2
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       4
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       5
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       6
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;             ATTACHMENT M-3
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       1
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       2
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       3
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;              ATTACHMENT M-4
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       1
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       2
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       3
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       4
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *









                                       5

<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       6
<PAGE>
 
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION 

                                       *

                                       7
<PAGE>

                                                                    Attachment N

                             OMNIPOINT CORPORATION
                             ---------------------
                                        
                                        
                  This section has been intentionally omitted.



Ericsson, Inc.-Not for use of disclosure outside Omnipoint except under written
agreement
<PAGE>

                                                                    Attachment O

                             OMNIPOINT CORPORATION
                             ---------------------
                                        
                                        
                  This section has been intentionally omitted.



Ericsson, Inc.-Not for use of disclosure outside Omnipoint except under written
                                   agreement
<PAGE>

                                                                    Attachment P


                             OMNIPOINT CORPORATION
                             ---------------------
                                        
                  This section has been intentionally omitted.



Ericsson, Inc.-Not for use of disclosure outside Omnipoint except under written 
agreement.
<PAGE>

                                                                    ATTACHMENT Q
                                                     ACQUISITION AGREEMENT #9107

                             OMNIPOINT CORPORATION
                             ---------------------
                                        
                              TECHNICAL EDUCATION
                              -------------------

The actual training program will be developed jointly by Ericsson and Omnipoint
for off-site and on-site training after signing of the contract.

In witness hereof, all parties signed below are in agreement to the enclosed
Attachment Q, Revision B, dated February 15, 1996.

ERICSSON INC.                          OMNIPOINT CORPORATION
/s/ Lars Skoglund                      /s/ Curt Gervelis
- -----------------------------          -------------------------------
Lars Skoglund                          Curt Gervelis
Project Manager                        Network Engineer



                                     NOTICE
   NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
<PAGE>

                                                                    ATTACHMENT Q
                                                     ACQUISITION AGREEMENT #9107

                             OMNIPOINT CORPORATION
                             ---------------------
                                        
                              TECHNICAL EDUCATION
                              -------------------
                                        
INTRODUCTION

This attachment offers alternatives to meet the CMS 40 Mobile Switching Center
(MSC), Base Station Controller (BSC), and Base Transceiver Station (BTS) minimal
technical training requirements.  An expanded list of CMS 40 courses is enclosed
for your review and after contract signing a CMS 40 course catalogue will be
provided.

TECHNICAL EDUCATION CENTER STUDENT CERTIFICATION PROGRAM

The program is a competency development program with basic core courses and
several areas of concentration.  CMS 40 offers three areas of concentration:
MSC, BSC, and BTS.  Within each area of concentration, multiple levels of
technical competence are possible (MSC has 4 levels and BTS has 3 levels).

     .  LEVEL 1    Provides training required to perform basic routines and
        administration under the guidance of a technician certified at Level 3
        through this student certification program.

     .  LEVEL 2    For the technician required to perform normal operation and
        maintenance activities using standard Ericsson exchange documentation.

     .  LEVEL 3    For the technician who will diagnose and repair both hardware
        and some software faults, as well as perform extended operation and
        maintenance functions.

     .  LEVEL 4    For the technician/engineer who is trained to be a trouble
        shooter on both hardware and software,  as well as have a strong command
        of advanced functions, features and system capabilities.

NOTE:  A Technical Education Student Certification is required as a prerequisite
to the corresponding level of Operations and Maintenance (O&M) Certification.


                                     NOTICE
   NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
                                       1
<PAGE>

                                                                    ATTACHMENT Q
                                                     ACQUISITION AGREEMENT #9107
STEPS:

To become certified, through the Technical Education Center's Student
Certification Program, three steps must be completed.  The student must:

  1.   Successfully complete the courses identified (80% or better score in each
       course).  These required courses are listed in the ETEC course catalog.

  2.   Have the specified amount of work field experience.

  3.   Submit an application for certification, at which time Ericsson Inc. will
       notify the employee's supervisor or team leader of student competency
       development certification eligibility.  If the employee has met all
       requirements for level requested, Ericsson will send a certificate of
       certification to the employee's supervisor.

NOTES:

  A  Credit for passing courses will not be automatic.  Students will be
     evaluated via written quizzes, performance of lab exercises, and
     observation of the student's ability to perform.

  B  All instructors teaching concentration courses are required to be certified
     to teach the class.  Instructor certification includes two elements:
     Professional Certification and Technical Certification.

  C  All courseware has been revised to include the new evaluation criteria, as
     well as recent Cellular Network Administration's (CNA) improvements.
     Also, additional lab exercises are added as needed.

  D  In the event that a student wishes to waive a course that is required for
     certification, his/her supervisor must submit a course description or
     outline of an equivalent course plus a certificate of completion for the
     substituted course.  The Certification Office will determine the
     eligibility of the substituted course description or outline needs to be
     submitted per customer, so that additional course descriptions or outlines
     need not be submitted for that customer's employees.


                                     NOTICE
   NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
                                       2
<PAGE>

                                                                    ATTACHMENT Q
                                                     ACQUISITION AGREEMENT #9107
CURRICULUM

The Ericsson Technical Education Center suggests the following CMS 40 course for
O&M personnel:

CMS 40 SYSTEM INTRODUCTION, 4 DAYS

This course provides management and non-management personnel a basic knowledge
and understanding of Ericsson's PCS 1900 equipment located at the Mobile
Switching Center (MSC), Base Station Controller (BSC) and Base Transceiver
Station (BTS).

The CMS 40 System Introduction course is a prerequisite for all CMS 40 Operation
and Maintenance courses.  The AXE-10 O&M course meets the prerequisite for the
MSC and BSC O&M courses.

The CMS 40 System Introduction course can be presented the week prior to the
AXE-10 O&M training in Richardson.  Subject to instructor availability, it could
be presented at the customer location.

AXE -10 OPERATION AND MAINTENANCE TRAINING, 15 DAYS

This course provides managers, engineers, and switch  technicians a working
knowledge of the AXE 10, its equipment, operation, and maintenance.   The AXE 10
is the basis of the switching system in CMS 40, Ericsson's PCS 1900 system.
This course will precede the MSC and BSC Operation and Maintenance courses.

This course relies extensively on hands-on practices for competence development.
Although it is not recommended for use at customer location, this can be
accommodated with proper provisioning.

CMS 40 MSC OPERATION AND MAINTENANCE, 5 DAYS

This course provides managers, engineers, and switch technicians a working
knowledge of the Mobile Switching Center (MSC),  Visitor Location Register (VLR)
and Home Location Register (HLR) operation and maintenance.

This course relies extensively on hands-on practices for competence development.
Although it is not recommended for use at customer location, this can be
accommodated with proper provisioning.

CMS 40 BSC OPERATION AND MAINTENANCE, 5 DAYS

This course provides managers, engineers, and switch technicians a working
knowledge of the Base Station Controller (BSC) operation and maintenance.


                                    NOTICE
  NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT

                                       3
<PAGE>

                                                                    ATTACHMENT Q
                                                     ACQUISITION AGREEMENT #9107


This course relies extensively on hands-on practices for competence development.
Although it is not recommended for use at customer location, this can be
accommodated with proper provisioning.

RBS 2000 OPERATION AND MAINTENANCE TRAINING, 5 DAYS

This course provides managers, engineers, and radio base station technicians a
working knowledge of the RBS 2000 Base Transceiver Stations (BTS)
commissioning, operation and maintenance

This course relies extensively on hands-on practices for competence development.
Although it is not recommended for use at customer location, this can be
accommodated with proper provisioning.

OPERATION SUPPORT SYSTEM TRAINING, 5 DAYS

This course provides BTS technicians, RF engineers, and switch technicians a
working knowledge of the Operation Support System (OSS).

This course relies extensively on hands-on practices for competence development.
Although it is not recommended for use at customer location, this can be
accommodated with proper provisioning.



                                     NOTICE
   NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT

                                       4

<PAGE>
                                                                    ATTACHMENT Q
                                                     ACQUISITION AGREEMENT #9107

PRICING -  CONTAINED IN SECTION A-15.

Advanced training is available for developing the system analysis skills for the
Employee.  BSC training is advised for the more advanced field technician.

1996 TRAINING SCHEDULE

Ericsson's CMS 40 technical training schedule for minimal courses required for
certification is as follows.
<TABLE>
<CAPTION>
 
SYSTEM INTRO.  (4 DAYS)    LZU 108 3336/1
<S>                        <C>             <C>   <C>
 
            Jan             9-12           Feb      27-Mar 1
            Jan            30-Feb 2        Mar      19-22
 
      AXE 10 O&M  (15 DAYS)                LZU 108 3354/1
 
            Jan            15-Feb 2
            Mar             4-22
 
      MSC O&M  (5 DAYS)                    LZU 108 3355/1
 
            Jan            15-19           Mar       4-8
            Feb             5-9            Mar      25-29
 
 
      BSC O&M  (5 DAYS)                    LZU 108 3356/1
 
            Jan            22-26           Mar      11-15
            Feb            12-16           Apr       1-5
 
      RBS 2000  (5 DAYS)                   LZU 108 3357/1
 
            Jan            15-19           Mar       4-8
            Feb             5-9            Mar      25-29
 
      OSS OPERATION (4 DAYS)               LZU 108 3359/1
 
            Jan            8-11            Mar        4-7
            Feb             5-8
</TABLE>
Note:   Schedule is subject to change.  All courses must be checked for
availability by calling the training center at (214) 437-8294.

                                     NOTICE
   NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT

                                       5


<PAGE>
                                                                    ATTACHMENT Q
                                                     ACQUISITION AGREEMENT #9107

COURSE REGISTRATION

On the following page is Ericsson technical training course registration form.



                                     NOTICE
   NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT

                                       6


<PAGE>
<TABLE>
<CAPTION>
ERICSSON
TECHNICAL EDUCATION CENTER                        PLEASE PRINT ALL INFORMATION                   BILLING INFORMATION
     ENROLLMENT FORM 
<S>                                               <C>                                            <C>                         
                                                  CLASSES TO BE ATTENDED                         Coordinator's
                                                                                                 Name:
                                                                                                      --------------------------
Student
Name:
     -------------------------------- 
                                                  Course Number: LZU -                           Manager/Supervisor's Name:
Social Security No.:                                             ------------------------  
                    -----------------                                                                  
                                                  Course Name:                                  
                                                              ---------------------------
Title:                                                                                           ------------------------------- 
      -------------------------------                                                             Printed
Company:                                          Date Class Begins:  (MM/DD/YY)                               
        -----------------------------
                                                        1st Choice:
Mail Stop:                                                         ----------------------
          ---------------------------                   2nd Choice:                              -------------------------------
                                                                   ----------------------
Mailing    
Address:-----------------------------                 
                                                  Course Number: LZU -                           Manager/Supervisor's Tel. No.:
- -------------------------------------                           -------------------------         
                                                                                                 ------------------------------- 
City:                                             Course Name:
     --------------------------------                         ---------------------------
State:             Zip Code:                      Date Class Begins:   (MM/DD/YY)
      -------------         ---------                                                        
Country:                                                1st Choice:                              Cost Center:
        -----------------------------                              ----------------------                    -------------------
Postal Code:                                            2nd Choice:                              Purchase Order No.:   
            -------------------------                              ----------------------                           ------------
Tel. No.:
         ----------------------------   
  Include Country Code if outside USA.
Fax. No.
        -----------------------------                                                        
                                                                                                      Mail applications to:
                                                     FOR OFFICE USE ONLY                  
      QUESTIONS?
CMS 8800 Courses call:                            Registrar:                                             ERICSSON, INC.
                                                            -----------------------------                            
     214/437-8135                                 Date:                                                   M/S Training
                                                       ----------------------------------               740 E. Campbell  
                                                  Confirmation#                                      Richardson, TX 75081    
CMS 40 Courses call:                                           --------------------------                     
     214/437-8294                    
                                                  Cancellation#                                         or Fax form to:
                                                               --------------------------                 214/705-8522
</TABLE> 






                                                     
                                      
<PAGE>
                                                               ATTACHMENT Q
                                                ACQUISITION AGREEMENT #9107


CMS 40 COURSES
- --------------

CMS 40 AXE Installation Testing
AXE Construction Technique, BYB 202
AXE Installation Methods for Supervisors
Power Systems Installation Test & Expansion
AXE Software
AXE Advanced Software Fault Handling
Telecool Compact Overview
Telecool Compact Operation & Maintenance
AXE 10 Operation & Maintenance (CBT)
CCITT No. 7 Signaling System (CBT)
AXE 10 Survey (CBT)
Telecom 2000: An Overview (CBT)
Telecom 2000: Fundamentals (CBT)
CMS 40 System Overview
CMS 40 System Introduction
CMS 40 AXE 10 Operation & Maintenance
CMS 40 MSC  Operation & Maintenance
CMS 40 BSC Operation & Maintenance
CMS 40 RBS 2000 Operation & Maintenance
CMS 40 Data Translations
CMS 40 OSS Operations & Basic Administration
CMS 40 STS Operation
CMS 40 AUC/EIR Operation
CMS 40 Toll Ticketing Workshop
CMS 40 Advanced System Technique
CMS 40 Power Systems Operation & Maintenance
CMS 40 RF Engineering 2
CMS 40 Home Location Register (HLR) Operation
CMS 40 GIWU Operation & Maintenance
CMS 40 Charging Subsystem (CHS) Operation
CMS 40 RF Engineering 1
Introduction to the Intelligent Network (IN)


                                     NOTICE
   NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
                                       
                                       8                       

<PAGE>
                                                                    ATTACHMENT R
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------
                                                                                
                                        
                             OMNIPOINT CORPORATION
                             ---------------------
                                        
                             THIRD PARTY ENGINEERS
                             --------------------- 
                                        
In witness hereof, all parties signed below are in agreement to the enclosed
Attachment R, Revision C, dated February 15, 1996.

ERICSSON INC.                               OMNIPOINT CORPORATION
/s/ Lars Skoglund                           /s/ Curt Gervelis
___________________________                 ___________________________________
Lars Skoglund                               Curt Gervelis
Product Manager                             Network Engineer



                                     NOTICE
   NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT



<PAGE>
<TABLE>
<CAPTION>
 
                                                                   Attachment R
                                                                   -------------
<S>                      <C>
Donald Cox               Professor, Electrical Engineering
                         Stanford University
                         Department of Electrical Engineering
                         Durand 305
                         Stanford, California  94305-4055
                         (415) 723-5443

Bruce Lusignian          Professor, Electrical Engineering
                         Stanford University
                         Department of Electrical Engineering
                         Durand 305
                         Stanford, California  94305-4055
                         (415) 723-5443

Michael B. Pursley       Holcombe Professor
                         Clemson University
                         Department of Electrical & Computer Engineering
                         102 Riggs Hall, Box 340915
                         Clemson, SC  29634-0915
                         (803) 656-1528

Theodore S. Rappaport    Professor, Electrical Engineering
                         Virginia Polytechnic Institute & State University
                         Blacksburg, Virginia  24061
                         (703) 231-5643

Jack Holtzman            WINLAB
                         Rutgers University
                         (908) 932-3849

John Litva               Professor, Chair in Antennas and Director
                         Communications Research Laboratory
                         McMaster University
                         Hamilton, Ontario  Canada
                         (905) 525-9140 ext. 23142
                         fax:  (905) 521-2922

                                      -1-

</TABLE> 
<PAGE>
<TABLE> 
<CAPTION> 
<S>                     <C> 

Elvino S. Sousa          Associate Professor, Dept. of Electrical Engineering
                         University of Toronto
                         10 Kings College Road SF1 107
                         Toronto, Ontario M5S 1A4
                         (416) 978-3651
                         fax (905) 978-7423

Robert Bultitude         Manager, Land Mobile and Indoor
                         Radio Propagation Research, Radio Science
                         Communications Research Centre
                         [Canada]
                         (613) 998-2775
                         fax:  (613) 998-4077
</TABLE>

                                      -2-
<PAGE>
                                                                    ATTACHMENT S
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------

                             OMNIPOINT CORPORATION
                             ---------------------
                                        
                           ORDER & DELIVERY INTERVALS
                           --------------------------
                                        
In witness hereof, all parties signed below are in agreement to the enclosed
Attachment S, Revision B, dated February 14, 1996.

ERICSSON INC.                                 OMNIPOINT CORPORATION
/s/ Lars Skoglund                             /s/ Curt Gervelis
_______________________________               _________________________________
Lars Skoglund                                 Curt Gervelis
Product Manager                               Network Engineer



                                     NOTICE
   NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
    
                                       1

                                      
<PAGE>

                                                                    ATTACHMENT S
                                                     ACQUISITION AGREEMENT #9107
- --------------------------------------------------------------------------------

                             OMNIPOINT CORPORATION
                             ---------------------
                                        
                           ORDER & DELIVERY INTERVALS
                           --------------------------

Ericsson intends to provide OCI with competitive Delivery Intervals consistent
with the following standard intervals. The intervals of the Network Elements
assume standard configuration and an accurate forecasting.

Forecasting within Ericsson is done on  monthly bases. The Forecast has a 18
month horizon.

It is assumed that OCI give Ericsson a monthly review of the Forecast.

For the equipment to be delivered for the initial configuration, Ericsson will
meet these intervals provided that OCI maintains the general scope and timing
set forth in Attachment H (Project Schedule).
<TABLE>
<CAPTION>
 
 
NETWORK ELEMENT                                  DELIVERY
- ----------------                                 --------------
 <S>                                             <C>
 
MSC                                              8 weeks
 
HLR                                              8 weeks
 
BSC                                              8 weeks
 
MXE                                             16 weeks 
 
OSS                                              8 weeks
 
BILLING GATEWAY                                  8 weeks
 
SOG                                              8 weeks
 
AUC/EIR                                         16 weeks   
 
RBS                                              2 weeks
</TABLE>

                                     NOTICE
   NOT FOR USE OR DISCLOSURE OUTSIDE OMNIPOINT EXCEPT UNDER WRITTEN AGREEMENT
                                       1


<PAGE>

                                                                    Attachment T
                                                                    ------------
                           OMNIPOINT TRAVEL HANDBOOK

                               TABLE OF CONTENTS

INTRODUCTION

SCOPE

OBJECTIVE

EXCEPTIONS TO POLICY

TRAVEL ARRANGEMENTS

     AIR TRAVEL
       Lowest Fare Routing
       Travel Restrictions
       Frequent Flyer Benefits
       Class of Service
       Travel Profile Forms
       Prepaid Tickets
       Unused Tickets
       Extending Travel over a Weekend
       Air Travel Insurance
     LODGING
       Hotels
       Guidelines for Rates
       Accommodations with Friends or Relatives
     CAR RENTAL
       Booking
       Refueling
       Automobile Insurance
       Notification of Accidents
       Personal Automobiles
     MEALS AND ENTERTAINMENT
       Personal Meal Allowance
       Entertainment
     MISCELLANEOUS EXPENSES
       Phone Calls
       Reimbursable Expenses
       Non-Reimbursable Expenses
EXPENSE REIMBURSEMENT PROCESS
     Forms and Receipts for Expenses
     Procedure and Time Cycle
<PAGE>

                             OMNIPOINT CORPORATION
                             ---------------------
                                        
                              REIMBURSEMENT POLICY
                              --------------------
                                        
INTRODUCTION
- ------------

We are pleased to provide you with your personal copy of the Omnipoint Employee
Travel Handbook.  The information contained in the Handbook represents a
compilation of policy statements and travel guidelines which are designed to
assist you in performing your travel related activities in an efficient and
cost-effective manner.  In addition, they will ensure compliance with Internal
Revenue Service requirements.

Business travel and entertainment costs represent a large operating expense for
the company.  Our business relationship with Garber Travel should enable us to
take full advantage of savings opportunities whenever possible.  Only with your
support and cooperation will we be able to control the significant and ever-
rising expenses related to business travel.

Please keep in mind that not every situation can be covered by a set of written
policies.  Employees should use god judgment and common sense whenever the
appropriate action is not clear from the face of these policies.  Please consult
your manager or your Human Resources representative if you have questions.

Thank you for your continuing support and cooperation.


SCOPE
- -----

This travel Handbook is applicable to all Omnipoint employees. It is intended to
serve as a guide for all business related travel.


OBJECTIVE
- ---------

Omnipoint's objective is to reimburse our employees for their reasonable and
actual travel expenses.  All such expenses incurred by our employees are
eligible for reimbursement subject to the guidelines contained in this handbook.

In order to provide convenient and cost-effective travel services, Omnipoint
requires that all airline reservations, hotel reservations and car rental
reservations, as well as all en route changes, be made through Garber Travel.
Omnipoint has chosen Garber Travel as its exclusive designated corporate travel
agency.  Garber Travel is located on-site at Omnipoint's office in Colorado
Springs.  In addition, Garber Travel's offices in Montvale, NJ, Arlington, VA,
and Newport Beach, CA will handle travel arrangements for Omnipoint headquarters
and field locations.


EXCEPTION TO POLICY
- -------------------

Unless specifically authorized in this policy, expenditures to the contrary are
not authorized.  Employees submitting expense reports that are not in compliance
risk delayed or partial reimbursement, unless the exception has the prior
approval of the Vice President of Human Resources.  Cases of significant or
willful abuse may result in disciplinary action.
<PAGE> 


TRAVEL ARRANGEMENTS
- -------------------

AIR TRAVEL

Employees must make all travel arrangements through Garber Travel.  The
locations, telephone numbers and hours of operation are as follows:

      Garber Travel
      c/o Omnipoint
      1365 Garden of the Gods Road
      Colorado Springs, CO  80907
      (719) 548-1200
      Monday-Friday, 9:00am-6:00pm, Mountain Time

      Garber Travel
      4000 MacArthur Boulevard, Suite 102
      Newport Beach, CA
      (714) 752-7080 direct
      (800) 245-2835 toll-free
      (714) 752-8347 fax
      Monday-Friday, 8:00am-5:00pm, Pacific Time

      Garber Travel
      210 Summit Avenue
      C Building, 1st Floor
      Montvale, NJ  07645
      (201) 391-6300 direct
      (800) 359-7949 toll-free
      (201) 391-6300 fax
      Monday-Friday  8:00am-5:00pm, Eastern Time

      Garber Travel
      Stafford Place
      4201 Wilson Boulevard
      Arlington, VA  22203
      (703) 807-0300 direct
      (800) 816-8717 toll-free
      (703) 807-0307 fax
      Monday-Friday, 8:30am-5:30pm, Eastern Time

All travelers are required to take the lowest possible coach fare for air
travel.  Reservations should be booked as early as possible to take full
advantage of any discounts or economy fares that are available.  Air travel
arrangements will not be influenced by airline preferences or frequent flyer
mileage programs if there is increased cost to Omnipoint.  In addition, personal
travel plans may be arranged through Garber Travel, should anyone want this
service from them.  When combining business and personal travel, employees are
responsible for any additional cost above what the lowest cost business trip
would be.


<PAGE>

Lowest Fare Routing

Omnipoint's intent is to achieve maximum practical savings on air travel
expenses.  All employees will travel coach class, or on specially reduced fares
when available.  Garber Travel will book the lowest available fare for direct
routing. (Employees will not be requested to make unnecessary connections for
fare savings.) Any exceptions must be based on business need, and will be noted
in Garber Travel's management reports to Omnipoint.

Travel Restrictions

The frequency of air travel will, on occasion, create situations where several
individuals may be scheduled for the same flight.  To minimize the loss to the
company should a single accident occur, some restrictions regarding joint
traveling are important. Therefore, no more than three executive officers or a
total of ten employees may travel together on the same flight.

Garber Travel has been authorized to enforce these restrictions.

Frequent Flyer Benefits

Employees may express an airline preference and are personally entitled to
accumulate points on airline frequent flyer programs, as long as no unnecessary
additional expenses are incurred by the company.

Class of Service

Coach Class will be used for all domestic flights.  Business class may be
selected for international flights over eight hours long, or for shorter
international flights where a full business day has been scheduled for the
arrival day.

Travel Profile Forms

All employees expected to travel once a year or more must submit a completed
Travel Profile to Garber Travel.  It is the traveler's responsibility to notify
Garber Travel, via telephone or in writing, of any changes or updates to
existing profile.  Additional profile forms can be obtained from Garber Travel.

Prepaid Tickets

Prepaid tickets (to be picked up at the airport) are more costly to Omnipoint,
and should only be used in emergency situations.

Unused Tickets

Unused tickets should be returned immediately to Garber Travel so that a prompt
refund may be obtained.

Extending Travel over a Weekend

Travel over a Saturday night can result in substantial saving in air fare.  If
the total cost of the trip to the business destination is lowered by the
traveler staying over a Saturday night, and the traveler wishes to do so,
Omnipoint will assume the cost of additional hotel, car rental and reasonable
meal expenses as long as there is a net savings to the company.


<PAGE>

Air Travel Insurance

Omnipoint provides travel accident insurance coverage for employees while
traveling on company business in accordance with Omnipoint policy in effect at
that time.

Management Reports

Each month Garber Travel will provide Omnipoint reports documenting all travel
that has occurred.  Analysis of these reports, including exceptions to policy
which have occurred, will help assure the company is operating in a cost
effective manner.

LODGING

Hotels

Hotel accommodations for each night away from home on company business will be
reimbursed at actual cost.  All hotel reservations must be made through Garber
Travel, unless attendance at a convention, seminar or other business function
dictates otherwise.

Hotel charges should be limited to room, tax, meals and telephone expenses as
required.  Room service and other miscellaneous services should not be used
unless necessary.  On business trips which extend beyond seven days,
reimbursement will be made for reasonable hotel laundry and valet service
expenses.

It is strongly recommended that on all business long distance telephone calls
(particularly calls made from hotel rooms) you use a telephone credit card if
possible, as there is a substantial savings from hotel phone rates.

Lodging charges are to be billed to the traveler's credit card, and reported on
an expense report.  The original hotel folio bill is always required
documentation for reimbursement of lodging charges, regardless of hotel cost.
For overseas travel a copy of the credit card voucher is also required.

Guidelines for Rates

Garber Travel will usually make hotel reservations in most travel situations.
At time, employees may have to make their own arrangements.  Employees should
always exercise care in obtaining only moderately price rooms.  In cities where
we have negotiated hotel rates, those hotel should be used first.  In other
instances, reasonable and moderate accommodations should be considered.

Accommodations with Friends or Relatives

Should an employees stay overnight with friends or family while on company
business, the employee may on occasion buy a gift or a meal for the host, and
will be reimbursed for the expense.  For tax purposes, a receipt is always
required for this reimbursement.


<PAGE>
CAR RENTAL

Booking

All car rental reservations must be booked through Garber Travel.   Omnipoint
has designated National Car Rental Company as its primary car rental supplier.
Employees traveling alone should use a compact to intermediate size car while on
company business.

Cars should be rented only when other means of transportation are unavailable,
more expensive or impractical.  The use of a rental car should be based on
business and/or transportation need, not as a matter of personal convenience.

Refueling

Prior to returning the rental car, please refuel the car to eliminate the
refueling service charge by the car rental company.  The gasoline expense should
be included, with a receipt, on the expense report.  Car rental agencies charge
a very large premium price for gasoline when refueling at the airport.

Automobile Insurance

When renting with National in the U.S., employees should decline optional
insurance coverage, as it is included under our contract with National.  If
National is not used, additional coverage may be purchased if it isn't provided
under the employee's personal insurance on rentals.

When renting internationally, additional coverage should be accepted regardless
of which rental company is being used.

Notification of Accidents

If you are involved in an accident while operating a rental car on company
business, immediately make the following notifications:

     1. the local police station
     2. the local car rental agency representative
     3. Omnipoint Human Resources representative

The notification should include the date, time and place the accident occurred,
the name(s) of the other driver(s), passengers or witnesses, and the drivers
license number(s) of the other driver(s).

Personal Automobiles

Employees using their personal car for Omnipoint business should receive
authorization to do so from their immediate manager.   Employees will be
reimbursed $.30 per mile plus parking and toll charges, for which receipts are
required for reimbursement.

Omnipoint covers excess liability insurance which covers employees driving
personal cars on company business.  This is excess liability insurance over the
above the employee's own liability insurance.  Omnipoint doesn't carry insurance
protection for property damage to personal cars.  No personal car should be used
on Omnipoint business that does not meet with individual State statutory limits
and requirements.


<PAGE>

MEALS AND ENTERTAINMENT

Personal Meal Allowance

Reasonable and actual meal expenses, including tax and gratuity, will be
reimbursed.  The dollar limit of "reasonable" will vary from city to city, and
employees are asked to use good judgment when selecting appropriate dining
establishments.

When two or more employees are dining while on business travel, they may divide
the check and each be reimbursed for their costs, or the senior ranking employee
present may pay and be reimbursed for the total bill.  All meal expenses of
$25.00 or more must be accompanied by a restaurant receipt.

Entertainment

Business practice includes the necessity from time to time to host business
contacts under conditions conducive to discussion.  The IRS requires
documentation to support each such instance of business entertainment.  Included
with the expense report should be a receipt which identifies the persons in
attendance, the date and location of the event, and the business purpose.  All
such entertainment should be paid for by the most senior Omnipoint employee
present.

On-site business meetings, employees recognition events, interview meals or
seminars are acceptable on an occasional basis.  These expenses must be
accompanied by a receipt from the appropriate manager.

MISCELLANEOUS EXPENSES

Phone Calls

Business calls and fax charges while traveling are reimbursable.  Calling from
home or office is less expensive than using a company calling card, mobile or
cellular phone.  Reimbursement will be made by submitting an expense report with
a copy of the phone bill, with the business calls identified.

Mobile or cellular phones, given their much higher cost of operation, should
only be used when necessary.  Administrative or other matters which are not
urgent or critical should be handled when access to an office or other lower
cost phone is available.

Reimbursable Expenses

The following are reimbursable miscellaneous expenses:

     -  Laundry, dry cleaning and shoe shines for trips over one week in
        duration
     -  Gratuities paid in accordance with local custom
     -  Telephone and fax charges, limited to business need and reasonable
        personal calls
     -  Passport and/or visa expenses related to international travel
     -  Travel expenses related to professional meetings, conferences, seminars,
        educational or professional conventions, when properly approved in
        advance.

        
<PAGE>

Non-Reimbursable Expenses

The following are normally not reimbursable expenses:
     -  Annual fees for personal credit cards
     -  Dues or charges for airline clubs
     -  Any type of personal trip insurance
     -  Barber and manicurist expenses
     -  Laundry, dry cleaning and shoe shines on trips less than seven days long
     -  Traffic fines and court costs incurred while traveling on business
     -  Personal reading matter or other personal services
     -  Prescriptions
     -  Toiletries
     -  Installation charges and monthly fees for mobile phones
     -  Flowers and gifts for other employees

EXPENSE REIMBURSEMENT PROCESS
- -----------------------------

Normal Business Expenses

Normal business expenses are reimbursed by submission of a Travel Expense Report
(sample copy attached), and include such items as transportation, lodging,
meals, gratuities and normal business entertainment.  Original receipts and
vouchers should be obtained where appropriate, and attached to the Report in
support of the included expenses.  Receipts are required for all transportation,
lodging and entertainment expenses, and for any meals costing $25.00 or more.

Ordinarily, no business charges should be billed directly to Omnipoint by the
provider.  Employees should pay all charges directly and be reimbursed through
submission of a Travel Expense Report.

Procedure

Travel Expense Reports, with appropriate receipts and documentation and approved
by the traveler's manager, should be submitted to Liz Slocum in the Colorado
Springs office no later than seven (7) day after completion of the trip.
Properly documented and approved reports will be reimbursed within two (2) weeks
of being submitted to Liz Slocum.


<PAGE>


                        [LOGO OF OMNIPOINT CORPORATION]
<TABLE> 
<CAPTION> 
                                   TRAVEL EXPENSE REPORT
- ------------------------------------------------------------------------------------------------
Name  Fred Walsh                   Date of Report           4/22/95
- ------------------------------------------------------------------------------------------------
Dept    987                        Purpose of Trip    Tech meetings in C.S.
- ------------------------------------------------------------------------------------------------
                                   Date of Trip       4/11-13/95
- ------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------
                           SUN     MON     TUE     WED     THU     FRI     SAT     Weekly Totals
- ------------------------------------------------------------------------------------------------
<S>                        <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>  
Date                                11      12      13                            
- ------------------------------------------------------------------------------------------------
Nature of Expenses                                                              
- ------------------------------------------------------------------------------------------------
Auto Rental                                        63.30                        
- ------------------------------------------------------------------------------------------------
Taxi, Bus, and Parking                             12.00                        
- ------------------------------------------------------------------------------------------------
Personal Auto Mileage                5.10           5.10
- ------------------------------------------------------------------------------------------------
Airfare                            480.00                                       
- ------------------------------------------------------------------------------------------------
Meals for Self                      18.00   31.15   4.80
- ------------------------------------------------------------------------------------------------
*Entertaining
- ------------------------------------------------------------------------------------------------
Lodging                             74.10   74.10
- ------------------------------------------------------------------------------------------------
Telephone                            6.75
- ------------------------------------------------------------------------------------------------
Gratuities                           1.00
- ------------------------------------------------------------------------------------------------
*Conf/Seminar Fees
- ------------------------------------------------------------------------------------------------
*Misc                                               8.10 
- ------------------------------------------------------------------------------------------------
Daily Totals                       584.95  105.25  93.30                               783.50
- ------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------
Explanation of Expenses                  Advance                                         --
- ------------------------------------------------------------------------------------------------
Entertaining                             Difference                                    783.50
- ------------------------------------------------------------------------------------------------
(Please include name of person or company, place,purpose, and amount)
- ------------------------------------------------------------------------------------------------
                                         Conf/Seminar Fees
- ------------------------------------------------------------------------------------------------
                                         (Please include name, place and amount)
- ------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------
Misc.  $8.10 Gasoline for rental car
- ------------------------------------------------------------------------------------------------
(Please include explicit details)
- ------------------------------------------------------------------------------------------------
- -----------------------------------------
- -----------------------------------------
- -----------------------------------------
Comments 
- -----------------------------------------
- ------------------------------------------------------------------------------------------------
Signature: /s/ Fred Walsh              Approved Signature:
           ------------------------                        -----------------------------
- ------------------------------------------------------------------------------------------------
</TABLE> 

<PAGE>
                                                                       Exhibit 2
                                                                           FINAL
                                                                  EXECUTION COPY
                                                                  --------------
                                                                                



                             ACQUISITION SUPPLY AND
                               LICENSE AGREEMENT


                                      FOR

                                   OMNIPOINT

                      PERSONAL COMMUNICATION SYSTEMS (PCS)
                            INFRASTRUCTURE PRODUCTS


                                    BETWEEN:

                                 ERICSSON INC.



                                      and



                             OMNIPOINT CORPORATION
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
<TABLE>
<CAPTION>
 
 
SECTION    DESCRIPTION                                      PAGE
- -------    -----------                                      ----
<S>        <C>                                              <C>
 
1.         Definitions                                         1
 
2.         Grant of Rights From OMNIPOINT to Ericsson          7
 
3.         Supply Commitment                                   9
 
4.         Ordering and Delivery                              10
 
5.         Delay                                              13
 
6.         Technology License Fees                            15
 
7.         Purchase Price                                     17
 
8.         Payment and Risk of Loss                           18
 
9.         BTS Performance Warranty                           19
 
10.        Software Performance Warranty                      21
 
11.        Limitation of Warranty; Limitation of Liability    22
 
12.        Post Warranty Support Services                     22
 
13.        Technical Assistance                               23
 
14.        Product Documentation                              24
 
15.        Incoming Inspection                                24
 
16.        Ownership of Marks, Copyrights, Trade              24
           Secrets and Labeling
 
17.        Quality Standards                                  25
 
18.        Reports and Audits                                 25
 
19.        Termination                                        26
</TABLE> 
                                      -i-

<PAGE>
<TABLE> 
<CAPTION> 

<S>            <C>                                                <C>  
20.            Information Exchanges                              27
          
21.            Class A Changes                                    28
          
22.            Patent, Copyright and Intellectual Property        28
               Rights Indemnification
          
23.            Legal and Regulatory Compliance                    29
          
24.            Hazardous Materials                                30
          
25.            Force Majeure                                      31
          
26.            Arbitration                                        31
          
27.            Marketing Efforts                                  31
          
28.            General                                            32

Appendix A     BTSs and Minimum Prices

Appendix B     Software License Agreement

Appendix C     EDI Procedures

Appendix D     Technical Specifications

Appendix E     Quality Standards

Appendix F     Class A Changes

Appendix G     Mutual Non-Disclosure Agreement

Appendix H     BTS and Software Maintenance Services: Post-Warranty

Appendix I     Initial Benchmark Prices

Appendix J     [Reserved]

</TABLE> 

                                     -ii-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION
                                                                           Final
                                                                  Execution Copy
                                                                  --------------


                    ACQUISITION SUPPLY AND LICENSE AGREEMENT

                                      FOR

                     OMNIPOINT PCS INFRASTRUCTURE PRODUCTS

This Acquisition Supply and License Agreement (the "Agreement") made and entered
into as of the 11th day of April, 1996 by and between ERICSSON INC., a
Delaware corporation, having an office in Richardson, Texas, acting through its
Radio Systems Division (hereinafter called "Ericsson"), and OMNIPOINT
CORPORATION, a Delaware corporation, having its executive offices at 1365 Garden
of the Gods Road, Colorado Springs, Colorado  80907 (hereinafter called
"OMNIPOINT").

1.   DEFINITIONS.
     ----------- 

     "Actual Price(s)" shall mean the actual Net Sale Price of BTSs sold by
     Ericsson to Customers.

     "Base Station Controller ('BSC')" shall mean Ericsson engineered equipment
     providing channel management between the MSC and the BTS.

     "Base Transceiver Station ('BTS')" shall mean OMNIPOINT supplied equipment,
     including all necessary Software resident in the BTS, that incorporates
     OMNIPOINT's IS-661 technology (regardless of whether manufactured by
     OMNIPOINT, Nortel, or such other equipment manufacturer with whom OMNIPOINT
     has a manufacturing agreement), providing the radio link with mobile
     subscribers, excluding third-party OEM antennas, for use in any and all
     applications in the 1850-1990 MHz frequency band only.
     *

     "Blanket Order" shall mean an Order that does not contain a Delivery Date.
     
     "BTS Firmware" shall mean any set of programs owned by OMNIPOINT in machine
     readable object code residing in hardware memories, including fixed code
     instructions resident in memories or equivalent devices forming part of
     hardware, for application in Ericsson Equipment, that provides basic logic,
     operating instructions and user-related application instructions, as well
     as associated software documentation, and is used in conjunction with
     hardware.
<PAGE>
 
     "Business Day" shall mean any day other than Saturday, Sunday or a
     statutory holiday observed by either party.

     "Change of Control" shall mean and shall be deemed to have occurred upon
     the first of the following events:

                 (A) any person becomes the beneficial owner, directly or
       indirectly, of securities of a company representing 50% or more of the
       combined voting power of the company's then outstanding voting securities
       and such person has the ability to elect a majority of the members of the
       Company's Board of Directors, if such ownership is not in place on the
       date of grant;

                 (B) any person becomes the beneficial owner, directly or
       indirectly, of securities of the company sufficient to elect a majority
       of the members of the Board of Directors of the company; or

                 (C) the sale of all or substantially all the assets of the
       company, or a merger, consolidation, or similar transaction of the
       company in which the company is not the surviving entity or the company's
       stockholders immediately prior to such transaction hold less than 50% of
       the voting securities of the surviving entity.

                 A Change in Control shall not include either of the following
       events:

                 (A) a transaction, the sole purpose of which is to change the
       state of the company's incorporation; or

                 (B) a transaction, the result of which is to sell all or
       substantially all of the assets of the company to another entity (the
       "surviving entity"); provided that the surviving entity is owned directly
       or indirectly by the company's stockholders immediately following such
       transaction in substantially the same proportions as their ownership of
       the company's voting capital stock immediately preceding such
       transaction.


     "Customer" shall mean any person, firm or corporation which purchases,
     leases, sublicenses or otherwise acquires a right to use any of the BTSs or
     Ericsson Equipment directly or indirectly from Ericsson.

     "Delivery Date" shall mean the date when a BTS shall be delivered to the
     Delivery Location.

     "Delivery Location" shall mean the Ericsson or Customer location to which
     the BTS shall be delivered.

                                      -2-
<PAGE>
 
     "EDI" shall mean electronic data interchange of information related to
     Orders and Releases.

     "Effective Date" shall mean the date first written above.

     "Ericsson Affiliate" shall mean all subsidiaries or affiliates wholly owned
     or controlled, directly or indirectly, by Ericsson Inc., and also includes
     Orbitel Mobile Communications Ltd.

     "Ericsson Equipment" shall mean all Ericsson supplied hardware components,
     software and firmware used or useful as part of or in connection with a
     System, including without limitation, Ericsson's base station subsystems,
     power supplies, OAM&P systems, transmission equipment, BSC, TRAU, MSC, HLR,
     VLR, Operational Support Systems ("OSS") and other ancillary equipment, but
     not including any equipment that can be shown to have been previously owned
     by a Customer or purchased by a Customer for a primary purpose other than
     to provide PCS type services.

     "Ericsson IS-661 PCS Infrastructure Equipment" shall mean Ericsson
     Equipment where such equipment is used in conjunction with one or more IS-
     661 based BTSs or incorporates IS-661 technology.

     "First Commercial Production Date" shall mean the date upon which both (i)
     a revenue producing System is fully operational in the New York MTA and
     (ii) the first BTS is used and incorporated in such revenue producing
     System.

     "Infrastructure Supply Agreement" shall mean that certain Acquisition
     Agreement for Ericsson CMS 40 Personal Communication Systems (PCS)
     Infrastructure Equipment by and between Ericsson Inc. and Omnipoint
     Communications Inc. entered into contemporaneously with the signing of this
     Agreement.

     "MSC" shall mean Mobile Switching Center.  MSCs may also include, without
     limitation, MSC components.

     "Marks" shall mean the trademarks, trade names and service marks now owned
     by, licensed, or hereafter obtained by OMNIPOINT for the hardware and
     Software.

                                      -3-
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

     "Maximum Shipping Period" shall mean:
      -----------------------             

         (i) with respect to prior to
     following the First Commercial Production Date, a period upon which the
     parties mutually agree to be the maximum period of time after which BTSs
     for which an Order has been received by OMNIPOINT must be shipped from the
     Shipping Location in accordance with Section 4.3 and

          (ii) with respect to any period
     following the First Commercial Production Date, a period equal to
     if the BTSs covered by an Order were scheduled for shipment at such time in
     a Firm Forecast in accordance with Section 4.3 and (b)
     the BTSs were not so forecasted.

     By way of illustration, the Maximum Shipping Periods allowable under this
     Agreement are as follows:

     *








     "Net Sale Price" shall mean the total invoiced amount from the sale, lease,
     sublicense or other disposition of Ericsson Equipment (including spares
     sold therewith) and Operating Software (including any upgrades or Version
     Releases thereto) to a Customer, less (a) transportation and insurance
     charges for the delivery of Ericsson Equipment to the



                                      -4-

<PAGE>
 
     Customer or other purchaser, (b) customs duties and similar governmental
     charges, and (c) sales, excise or other taxes or governmental charges
     levied on the sale, lease or other disposition of the Ericsson Equipment
     and Operating Software.

     "Network Element" shall mean the Ericsson Equipment, Ericsson IS-661 PCS
     Infrastructure Equipment and Operating Software purchased from Ericsson by
     a Customer required to perform switching, transmission or network node
     functions for a System (e.g., Authentication Center ("AUC"), BSC, Equipment
     Identity Register ("EIR"), Messaging System ("MXE"), Mobile Switching
     Center/Visitor Location Register ("MSC/VLR"), Mobile Intelligent Network
     ("MIN"), Service Signaling Point ("SSP"), Home Location Register ("HLR"),
     Service Control Point ("SCP") and MSC). For purposes of this Agreement, the
     term Network Element includes BTSs.

     "Nortel" shall mean Northern Telecom Inc., Northern Telecom Canada Limited
     and Northern Telecom (CALA) Corporation.

     "OCI" shall mean Omnipoint Communications Inc.

     "OMNIPOINT Affiliate" shall mean all subsidiaries or affiliates wholly
     owned or controlled, directly or indirectly, by OMNIPOINT.

     "Operating Software" shall mean Ericsson supplied software provided in
     connection with the Sale of Ericsson IS-661 Infrastructure Equipment or for
     the purpose of expanding or upgrading an existing System and does not
     include Programs.

     "Orbitel" shall mean Orbitel Mobile Communications, Ltd.

     "Order" shall mean either the document issued or the output of an
     electronic "paperless" process, in either case the process initiated by
     Ericsson by which a BTS is ordered under this Agreement.

     "Product Documentation" shall mean the master copy of the documentation
     required for the installation, maintenance and use of BTSs.

     "Product Specifications" shall mean the specifications for BTSs, which will
     be provided to Ericsson as soon as such specifications are available.
     OMNIPOINT shall obtain Ericsson's consent to any such specifications and
     any changes made to such specifications which materially affect performance
     of the System, such consent not to be unreasonably withheld.

     "Program" shall mean OMNIPOINT's computer programs constituting BTS
     Firmware, OMNIPOINT provided Software for vocoder cards and, if so
     provided, OMNIPOINT developed Software for RLICs, including Updates
     thereto, and as implemented from time to time by OMNIPOINT.


                                      -5-

<PAGE>
 
     Purchase Price(s)" shall mean the amounts to be paid to OMNIPOINT by
     Ericsson as established or to be negotiated pursuant to Section 1 hereof.

     "Release" shall mean either the document issued or the output of an
     electronic "paperless" process, in either case the process initiated by
     Ericsson pursuant to a Blanket Order by which the Delivery Date for such
     Blanket Order is established.

     "Sale" or "Sold" shall mean the sale, lease, license, sublicense or other
     transfer or use by Ericsson and shall be deemed to occur upon invoicing or
     putting into use by Ericsson, whichever shall occur first.

     "Serial Number" shall mean the bar-code readable number specified by
     Ericsson to identify OMNIPOINT or Nortel, as applicable, as the
     manufacturer to be affixed to each field replaceable BTS that indicated the
     manufacturing location, year and week of manufacture and a set of numeric
     characters identifying the unique serial number.

     "Services" shall mean all services invoiced by Ericsson in connection with
     the Sale of any System, Ericsson Equipment or Operating Software, including
     without limitation installation, system integration, support, maintenance
     and training.

     "Shipping Date" shall mean the date when a BTS shall be delivered to the
     carrier at the Shipping Location for shipment to the Delivery Location.

     "Shipping Location(s)" shall mean the location(s) from which a BTS shall be
     shipped by OMNIPOINT.

     "Software" shall mean a disk, tape, PROM, EPROM, or other magnetic or
     electronic storage devices on which has been placed a machine readable
     expression of a Program and the machine readable expression of that Program
     together with a copy of the User Manual explaining the use of that Program.

     "Subsidiary" shall mean a corporation or company in which a party hereto
     effectively owns or controls, and continues to own or control, directly or
     indirectly, more than fifty percent (50%) of the voting stock of shares,
     and with respect to Ericsson, Orbitel shall also be considered a Subsidiary
     for purposes of this Agreement.

     "System" shall mean an Initial Configuration and all Expansions thereto (as
     the terms Initial Configuration and Expansion are defined in the
     Infrastructure Supply Agreement) purchased by a Customer from Ericsson,
     including all Ericsson Equipment, Ericsson IS-661 PCS Infrastructure
     Equipment, Operating Software, installation and other services purchased
     from Ericsson by a Customer relating to a System.


                                      -6-

<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

"Term" shall mean the period beginning on the Effective Date and ending on the
fifth anniversary thereof, unless terminated earlier in accordance with the
terms and conditions hereof, or unless extended by the mutual written consent of
the parties hereto.  The Term shall automatically be extended for such period of
time as Infrastructure Supply Agreement is extended beyond December 31, 2001.

     "Territory" shall mean the world.

     "Update" shall mean a release of a Program in which only bug fixes to that
     Program are supplied.

     "User Manual" shall mean OMNIPOINT's copyrighted user information about a
     particular Program, and as revised from time to time by OMNIPOINT.

     "Version Release" shall mean a release of a Program in which new
     functionality has been added in addition to the normal complement of bug
     fixes also being supplied.

     "Warranty Period"
     beginning on the date of manufacture of each BTS by OMNIPOINT or Nortel, as
     applicable.

     "Warranty Repair Period" shall mean *
     commencing on the date that OMNIPOINT receives any of the following from
     Ericsson:  (a) a BTS which does not conform to the warranty set forth in
     Section 8.1 if the repair or replacement is to be performed at a location
     of OMNIPOINT, or (b) notice that a BTS does not conform to the warranty set
     forth in Section 8.1 if the repair or replacement is to be performed at a
     location of Ericsson or its Customers, or (c) notice that Software does not
     conform to the warranty set forth in Section 9.1.

2.   GRANT OF RIGHTS FROM OMNIPOINT TO ERICSSON

2.1  Subject to the terms and conditions set forth herein, OMNIPOINT hereby:

       (a) agrees to sell and Ericsson shall have the right to purchase (or
     otherwise procure, in the case of Software), for the purpose of use, resale
     or sublicense in the Territory, completed and fully operational BTSs from
     OMNIPOINT at the prices set forth in Section 6 and

     (b) grants to Ericsson a non-exclusive right and license to use, sell and
     lease BTSs as a constituent part of an integrated System or Ericsson
     Equipment and to use, market and sublicense the Programs as a constituent
     part of an integrated System or Ericsson Equipment only in object form, in
     each case under the Marks respectively applicable, if any, directly or
     indirectly, to Customers within the Territory.


                                      -7-

<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

     Ericsson hereby agrees to include, in accordance with 35 U.S.C. (S)287, all
     appropriate and applicable patent numbers on any equipment sold
     incorporating BTSs.

     Ericsson shall have the right to market and distribute Ericsson Equipment
     incorporating BTSs and to market and sublicense Software in object form
     under its own trademarks, service mark and/or trade dress with appropriate
     reference to OMNIPOINT in a form reasonably acceptable to OMNIPOINT.

2.2  For the Software in object form which Ericsson distributes directly to
     Customers, Ericsson shall require every such Customer to execute an
     agreement, containing provisions in which such Customers agree not to
     decompile any Software program delivered to such Customers substantially in
     the form of Appendix B hereto, to grant to Customers the right to use
     Ericsson proprietary and third party software products.

     *





2.4  OMNIPOINT grants to Ericsson the right to distribute copies of Updates,
     either directly or indirectly, to Customers that have signed the license
     agreement normally used by Ericsson in sublicensing rights to use the
     Program(s).  OMNIPOINT agrees to make available for purchase by Ericsson
     all Version Releases at OMNIPOINT's then current prices therefor, and upon
     such purchase grants to Ericsson the right to distribute copies of


                                      -8-

<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

     such Version Releases, either directly or indirectly, to Customers that
     have signed the license agreement normally used by Ericsson in sublicensing
     rights to use the Program(s).

2.5  In order to ensure adherence to the OMNIPOINT Common Air Interface ("CAI"),
     in the event that OMNIPOINT makes available to Ericsson an Upgrade or
     Version Release of the CAI that requires corresponding upgrades in the BTS
     or BSC, Ericsson hereby undertakes to implement such upgrades and make them
     available for purchase or license by its Customers.  Nothing in the
     Agreement shall permit Ericsson to make any modification or change to the
     CAI.  OMNIPOINT shall use commercially reasonable efforts to ensure that
     all Upgrades or Version Releases of the CAI shall be backward compatible
     with the most recent and prior two generations of BTSs purchased by
     Ericsson pursuant to this Agreement.

2.6  OMNIPOINT warrants that, title conveyed under Section 8.5 to all BTSs
     shipped to Ericsson or drop shipped directly to Customers shall pass to
     Ericsson or a Customer, as the case may be, free and clear of any liens,
     charges, encumbrances, restrictions or rights created in, by or against the
     BTSs or against OMNIPOINT, except any patent rights of OMNIPOINT and/or one
     or more of OMNIPOINT's licensors in the BTSs, if any.  In no event shall
     title to any Programs, pass to Ericsson or any Customer.

2.7  Nothing in the Agreement shall permit Ericsson to make any modification or
     change to the Software.  Ericsson shall have the right to download an
     Update or Version Release, after payment of any applicable fee, directly to
     BTS memories.  Ericsson agrees not to translate, decompile, disassemble,
     reverse engineer, create derivative works or take any steps intended to
     produce a source language statement of the object code version of the
     Programs, without the express written consent of OMNIPOINT.

3.   SUPPLY COMMITMENT
     
3.1  During the Term, Ericsson may, but shall not be obligated to, issue Orders
     or Releases to OMNIPOINT and OMNIPOINT shall fulfill such Orders or
     Releases in accordance with the provisions of this Agreement.

3.2  OMNIPOINT shall notify Ericsson *                                 to the
     discontinuation of production or sale of a BTS; and *
     to implementing any manufacturing, engineering or other changes which will
     materially affect the form, fit or function of a BTS.

3.3  Ericsson may purchase out-of-warranty repair parts for BTSs, at OMNIPOINT's
 
 
      (a)  the effective date of each change to or discontinuance of any BTS
     component which has been changed or discontinued, and (b) the date of
     termination or expiration of this Agreement.  Notwithstanding the
     foregoing, OMNIPOINT may, in lieu of providing


                                      -9-

<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION


4.   ORDERING AND DELIVERY
    
4.1  An Order or Release issued shall create contractual rights and obligations
     solely between Ericsson and OMNIPOINT.  Notwithstanding the foregoing,
     Ericsson Affiliates shall have the ability to place orders under this
     Agreement, with Ericsson guaranteeing the performance of their obligations.

4.2       (a)  Ericsson shall, using reasonable efforts, provide OMNIPOINT on a
     monthly basis *
     a written *
                                                                       of Orders
     and Releases.  The forecast shall include *
 
         of such forecast and monthly forecasts to *

       thereafter.  No such forecast shall be binding on Ericsson except as
     provided in 4.3(b) and 4.3(c) below.  Ericsson shall report any significant
     changes to the forecasts to OMNIPOINT without delay.

          (b) The first thirteen (13) weeks of Ericsson's forecast for BTSs
     shall become a binding commitment (the "Firm Forecast") as to the quantity
     of BTSs specified therein.  OMNIPOINT shall meet the Shipping Date for each
     Order or Release provided:

          (i)  the total quantity of BTSs Ordered or Released for delivery
          during any of the first four (4) weeks of a forecast does not exceed
          the quantity forecasted for that week, such quantity becoming fixed in
          the 4th week of the forecast; and

          (ii)  the actual quantity of BTSs Ordered or Released for the 5th
          through 8th weeks does not exceed the quantity forecasted for such
          week by more then 25%; such base quantity becoming established for any
          given week when it first rolls into the 8th week of the forecast; and

          (iii)  the actual quantity of BTSs Ordered or Released for the 9th
          through 17th weeks does not exceed the quantity forecasted for such
          week by more then 50%; such base quantity becoming established for any
          given week when it first rolls into the 17th week of the forecast; and

          (iv)  the actual quantity of BTSs Ordered or Released for the 18th
          through 26th weeks does not exceed the quantity forecasted for such
          week by more then 100%; such base quantity becoming established for
          any given week when it first rolls into the 26th week of the forecast.


                                     -10-

<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

     In the event that Ericsson requires quantities of BTSs during the 1st
     through 26th week of a forecast in excess of those provided for within this
     Section, the parties shall negotiate in good faith the Shipping Date for
     those excess quantities.

     In the event that Ericsson requires an adjustment to the weekly volume
     profile during any of the first four (4) weeks, but not the total quantity
     during such period, the parties will negotiate in good faith such
     adjustment.

     Notwithstanding the foregoing, during the period *
 
     the First Commercial Production Date and with respect to any Orders or
     Releases which contemplate delivery of BTSs that contain Ericsson specified
     design changes, the parties shall review any Orders or Releases issued by
     Ericsson on a case by case basis to mutually agree upon a Shipping Date.

          (c) The delivery of all quantities of BTSs committed by Ericsson to be
     purchased within the Firm Forecast or any Order may at Ericsson's option be
     delayed upon *                                prior notice *
     from the original Firm Forecast or Order Delivery Date, at which time
     Ericsson shall be obligated to purchase delayed quantities of BTSs.  Any
     commitment to delayed quantities of BTSs shall be considered met once it
     has been placed in a Firm Forecast or Order, over and above any amounts
     included in a previously delivered Firm Forecast or Order, and a Release
     has been issued therefor.  OMNIPOINT shall have no obligation to deliver a
     delayed quantity of BTSs until it has been placed in a Firm Forecast or
     Order and a Release has been issued therefor.

4.3  Except as otherwise set forth in this Section, OMNIPOINT shall accept, in
     accordance with the terms of this Agreement any Order or Release issued
     hereunder.  This Agreement shall continue to apply to all Orders and
     Releases issued during the Term until all obligations herein are performed.

4.4  If Ericsson uses EDI to issue an Order or a Release, such transaction shall
     be carried out in accordance with the provisions set forth in Part I of
     Appendix C.

4.5  Should the terms of any Order or Release conflict with the terms of this
     Agreement, the terms of this Agreement shall govern unless the parties
     expressly agree in writing to the contrary.  Notwithstanding that an Order
     or a Release does not refer to this Agreement, any Order issued by Ericsson
     during the Term shall be deemed to have been issued pursuant to this
     Agreement unless the parties expressly agree to the contrary.

4.6  An Order shall set forth a description of the following:  (a) Delivery
     Location, (b) the location where the invoice shall be rendered for payment,
     (c) method of shipment, (d) quantity and (e) Delivery Date and/or Shipping
     Date.  All shipping documents shall reference the number of the Order
     issued for the BTSs contained in the shipment.


                                     -11-

<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

4.7  No later than *
     Order or a Release, OMNIPOINT shall either confirm the Delivery Date or
     propose an alternate Delivery Date.  If OMNIPOINT fails to do so, it shall
     be deemed to have agreed to the Delivery Date set forth by Ericsson.
     Notwithstanding anything to the contrary contained in the first sentence of
     this Section 4.7, OMNIPOINT shall use reasonable efforts to confirm the
     Delivery Date contained in Ericsson's Order or Release, as applicable, as
     soon as practicable after OMNIPOINT has received such Order or Release.  If
     OMNIPOINT proposes an alternate Delivery Date, then Ericsson *
 
                                     Delivery Date notify OMNIPOINT that either
     such alternate Delivery Date is acceptable or such Order or Release is
     canceled.  If Ericsson fails to give such notice, it shall be deemed to
     have agreed to the alternate Delivery Date.  Notwithstanding the above,
     OMNIPOINT shall comply with any Delivery Date specified by Ericsson which
     is to occur on or after the end of the Maximum Delivery Period.

4.8  OMNIPOINT shall perform all administrative actions required to qualify each
     BTS for preferential treatment under the rules of any applicable trade
     treaty among Canada, Mexico and the U.S.A., including, without limitation,
     the North American Free Trade Agreement ("NAFTA").  If a BTS qualifies
     under NAFTA, OMNIPOINT shall prepare and distribute a NAFTA Certificate of
     Origin according to Section 4.10 or 4.11, whichever applies, and any other
     documents required.  OMNIPOINT shall respond to requests for information
     regarding any NAFTA Certificate of Origin and assist Ericsson in resolving
     any BTS eligibility issues.  OMNIPOINT shall be solely responsible for all
     penalties and costs resulting from a NAFTA Certificate of Origin
     subsequently being determined to be invalid.

4.9  If a NAFTA Certificate of Origin is prepared for each shipment, OMNIPOINT
     shall:  (a) retain the original NAFTA Certificate of Origin in OMNIPOINT's
     files with appropriate backup documentation, (b) attach a copy of the NAFTA
     Certificate of Origin to the customs/shipping documents for the qualifying
     BTS, and (c) mark the customs/shipping documents with legend:  "Copy of
     NAFTA Certificate of Origin Attached."

4.10 If a blanket NAFTA Certificate of Origin is prepared, OMNIPOINT shall:  (a)
     retain the original NAFTA Certificate of Origin in OMNIPOINT's files with
     appropriate backup documentation, (b) mark the customs/shipping documents
     for the qualifying BTS with the legend:  "Copy of blanket NAFTA Certificate
     of Origin on file at Ericsson's customs offices in Richardson, TX
     (U.S.A.)", and (c) mail copies of the NAFTA Certificate of Origin to the
     following offices:

               Ericsson Inc.
               Radio Systems
               740 Campbell Road
               Richardson, Texas  75801
               Attention:  Joe De La Luz


                                     -12-

<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

4.11 OMNIPOINT shall deliver an Order or a Release complete unless Ericsson
     otherwise agrees.  If OMNIPOINT fails to ship a BTS *
     of the Shipping Date, Ericsson may, in addition to any other right
     available to it under the law, cancel or reschedule, without charge, the
     unshipped portion of the Order or Release upon written notice to OMNIPOINT
     prior to shipment of such unshipped portion of an Order or Release by
     OMNIPOINT.


5.   DELAY
     
5.1    Delay by OMNIPOINT. In the event of delay by OMNIPOINT subsequent to the
       First Commercial Production Date, Ericsson shall have the following
       rights and responsibilities.

       5.1.1  Liquidated Damages. If, after the First Commercial Production
              Date, due solely to the fault or negligence of OMNIPOINT:  (i)
              receipt or acceptance of any complete BTS by Ericsson does not
              occur in accordance with Sections 4 and 15; (ii) Ericsson has a
              contract or other agreement with a Customer pursuant to which
              Ericsson is required to pay liquidated damages; and (iii) the
              delay of receipt of BTSs by Ericsson from OMNIPOINT causes
              Ericsson to pay liquidated damages pursuant to the terms and
              conditions of the contract or agreement referenced in (ii), then
              Ericsson shall be entitled to, and OMNIPOINT shall pay to
              Ericsson, damages in accordance with this paragraph 5.1.

       5.1.2  Computation of Damages. The parties agree that damages for delay
              are difficult to calculate accurately and, therefore, agree to fix
              as liquidated damages, and not as a penalty, an amount equal to
              the lesser *


                                     -13-

<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

                                       *

       5.1.3  The amount of liquidated damages due and payable hereunder shall
              be calculated by multiplying the applicable liquidated damages
              percentage, determined in accordance with the table above, by the
              aggregate price of the amount of such delayed BTS or BTSs
              ("Delayed Equipment"), for each week, or fraction thereof, of
              delay.  Subject to the other provisions of this Agreement,
              liquidated damages under this paragraph 5.1 shall be Ericsson's
              exclusive remedy for any delay by OMNIPOINT in delivering BTSs.
              Liquidated Damages shall accrue under this Agreement until such
              time as the delay period has ended, and the Liquidated Damages
              that may accrue hereunder, regardless of whether computed pursuant
              to Section 5.1.2 (i) or Section 5.1.2 (ii), *
 
                                       of the Delayed Equipment associated with
              such delay. Ericsson agrees that OMNIPOINT may, at its option, pay
              all liquidated damages owed pursuant to this Section 5.1 in the
              following manner:


5.2    Excusable Delay. In the event of delay not the responsibility of
       OMNIPOINT, the parties shall have the following rights and obligations.

       5.2.1  Excusable Delays. OMNIPOINT will not be liable for nonperformance
              or defective or late performance of any of its obligations
              hereunder to the extent and for such periods of time as such
              nonperformance, defective performance or late performance is due
              to an act deemed to be force majeure under Section 25 hereof or
              delays of suppliers or subcontractors if no equivalent source for
              such supplies or services can reasonably be obtained for the same
              causes.

       5.2.2  Exceptions to Excusable Delays. OMNIPOINT shall not be entitled to
              claim excusable delay under Section 5.3.1 above, for delays
              resulting from strikes or other labor disturbance at OMNIPOINT's
              manufacturing facilities.

       5.2.2  Notice. In the event that OMNIPOINT claims the benefit of
              excusable delay hereunder, OMNIPOINT shall promptly notify
              Ericsson of the circumstances creating the delay and provide a
              statement of the impact.


                                     -14-

<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

       5.2.3  Adjustment of Dates. Upon the determination that an excusable
              delay has occurred or is likely to occur, the parties shall meet
              to determine whether it is necessary to adjust the scheduled
              delivery of BTSs required by the firm forecast delivered pursuant
              to Section 4.2 or whether it is feasible to find alternative
              methods to make up part or all of the potential delay. The parties
              shall use their reasonable efforts to minimize the effect of an
              excusable delay (e.g., alternative shipping techniques, different
              suppliers, etc.). Unless explicitly agreed by Ericsson, any
              adjustment in the firm forecast delivery dates shall not exceed a
              day-for-day extension of time based upon the duration of the
              excusable delay.



6.   TECHNOLOGY INTEGRATION FEES
     ---------------------------

6.1    In consideration of the licenses granted pursuant to Section 2 hereunder,
       Ericsson shall pay to OMNIPOINT technology integration fees according to
       the following timing schedule:


       6.1.1  Pursuant to the Infrastructure Supply Agreement, upon Ericsson
              receiving orders for any combination of any type of Ericsson
              Equipment and all services performed in connection therewith
              placed by OMNIPOINT and/or an OMNIPOINT Affiliate for whom
              Ericsson has provided vendor financing (under the terms of such
              vendor financing agreement as executed by Ericsson and such
              OMNIPOINT Affiliate (a "Financing Agreement"))

       6.1.2  Pursuant to the Infrastructure Supply Agreement, upon Ericsson
              receiving additional orders in excess of those described in
              subsection (a) above for any combination of any type of Ericsson
              Equipment and all services performed in connection therewith
              placed by OMNIPOINT and/or an OMNIPOINT Affiliate for whom
              Ericsson has provided vendor financing under the terms of a
              Financing Agreement *

       6.1.3  Pursuant to the Infrastructure Supply Agreement, upon Ericsson
              receiving additional orders in excess of those described in
              subsection (b) above for any combination of any type of Ericsson
              Equipment and all services performed in connection therewith
              placed by OMNIPOINT and/or an OMNIPOINT Affiliate for whom
              Ericsson has provided vendor financing under the terms of a
              Financing Agreement



                                     -15-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

       6.1.4  *
              orders for Ericsson IS-661 PCS Infrastructure Equipment ordered by
              any third party or combination of third parties -


       6.1.5  Once OMNIPOINT, OMNIPOINT Affiliates or any combination thereof
              have ordered *
              of Ericsson Equipment and all services performed in connection
              therewith pursuant to subsections 6.1.1, 6.1.2 and 6.1.3 above,
                                     orders for Ericsson IS-661 PCS
              Infrastructure Equipment and services performed in connection
              therewith received by Ericsson from OMNIPOINT and/or an OMNIPOINT
              Affiliate - *



              Therefore, once OMNIPOINT and/or OMNIPOINT Affiliates have ordered
              an aggregate of *                  for any type of Ericsson
              Equipment and all services performed in connection therewith
              pursuant to subsections 6.1.1, 6.1.2 and 6.1.3 above, all orders
              for Ericsson IS-661 PCS Infrastructure Equipment and services
              performed in connection therewith placed by OMNIPOINT and/or
              OMNIPOINT Affiliates will be aggregated with all third party
              orders for Ericsson IS-661 PCS Infrastructure Equipment, and for
              in orders received by Ericsson, Ericsson shall pay OMNIPOINT
              * 









              For example, if, after OMNIPOINT and/or OMNIPOINT *



6.2    At Ericsson's option, all technology integration fees owed under Section
       6.1 may be paid to OMNIPOINT either

 



                                     -16-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION


       *         under the Infrastructure Supply Agreement, and as set forth in
       Appendix A to the Infrastructure Supply Agreement.


6.3    Ericsson acknowledges and agrees that if, subsequent to the date hereof,
       a Change in Control of either OMNIPOINT or Omnipoint Communications Inc.,
       has occurred, OMNIPOINT shall be entitled to require that any and all
       payments for technology integration fees due under this Section 6 shall
       be payable *


6.4    Ericsson agrees that, if an inquiry is made of Ericsson or if OMNIPOINT
       wishes to make a public disclosure, Ericsson will publicly acknowledge *



7.   PURCHASE PRICE
     --------------

7.1  Subject to an annual market/technology review pursuant to Section 7.3
     below, the unit prices (the "Purchase Price") for BTSs shall be set forth
     in the manner set forth in Appendix A attached hereto.

7.2  Either party may, not less than twelve (12) months after the date hereof or
     the conclusion of any renegotiation provided for herein, request that the
     prices established in the manner set forth in Appendix A be renegotiated
     and agreed upon in good faith by the parties in connection with a
     market/technology review.  Such renegotiation shall commence within fifteen
     (15) days and be completed within thirty (30) days after one party has
     notified the other party of its request to renegotiate and shall be based
     upon reasonable commercial terms.  Any such renegotiated prices shall be
     added to Appendix A by amendment.  If the parties are unable to agree to
     renegotiated prices within such thirty (30) day period, the prices
     established in the manner set forth in Appendix A, as previously amended,
     shall remain in effect.

7.3  OMNIPOINT will provide to Ericsson, *



                                     -17-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

8.   PAYMENT AND RISK OF LOSS
     ------------------------

8.1  All prices set forth in Section 7 are:  (a) in U.S. dollars; (b) exclusive
     of any applicable excise and sales taxes now existing or hereinafter
     imposed by any applicable excise and sales taxes now existing or
     hereinafter imposed by any applicable taxing authority; and (c) for all
     deliveries within the U.S., inclusive of transportation charges and duty
     applicable between the Shipping Location and the Delivery Location (but
     specifically exclusive of any export packaging costs or any other costs
     associated with shipments outside the U.S.).  Any taxes, transportation
     charges and duty for which Ericsson is liable shall be separately stated on
     the invoice.  OMNIPOINT agrees not to assess any applicable excise or sales
     tax where Ericsson furnishes OMNIPOINT, in a form reasonably acceptable to
     the taxing authority, prior to invoicing, a valid tax exemption
     certificate, certificate of authority, direct pay permit or any equivalent
     acceptable to the applicable taxing authority.  Ericsson shall indemnify
     and hold OMNIPOINT harmless from any and all subsequent assessments levied
     by a proper taxing authority for such taxes for which Ericsson is liable,
     including any interest, penalties or late charges due to Ericsson's failure
     to perform hereunder.

8.2  The Purchase Price for BTSs *
          which invoice shall not be sent by OMNIPOINT prior to the applicable
     Shipping Date.

8.3  *                               Ericsson shall deliver to OMNIPOINT a 
     report showing the actual orders by OMNIPOINT and its affiliates received
     during such calendar quarter for all Ericsson Equipment and Ericsson IS-661
     PCS Equipment. The report required to be delivered under this Section 8.3
     shall specify the date of receipt of each order, the dollar amount of each
     order, the type of equipment ordered and the calculation of the technology
     fees, computed on a rolling basis of orders 



                                     -18-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

     received, of the technology fees owed to OMNIPOINT. Ericsson shall remit
     payment of such quarter's technology fees to OMNIPOINT within ten (10) days
     thereafter.

8.4  In the event any part of a payment is not made on or before the date due,
     OMNIPOINT shall be entitled, for each month or portion thereof that such
     amounts remain unpaid, to assess a late payment charge applied against the
     unpaid portion of such amount due OMNIPOINT.  The late payment charge shall
     be applied daily after the due date until payment is received. The daily
     late payment charge shall be calculated by multiplying the outstanding
     balance for the day by that certain quotient, *



8.5  Title and risk of loss or damage to a product shall pass to Ericsson when a
     BTS is delivered to Ericsson's designated carrier at the Delivery Location.
     If Ericsson returns a BTS, risk of loss or damage for such BTS shall pass
     to OMNIPOINT when Ericsson delivers a BTS to a carrier.


9.   BTS PERFORMANCE WARRANTY
     ------------------------

9.1  OMNIPOINT warrants to Ericsson that, during the applicable Warranty Period,
     all BTSs will, under normal use and service, be free of defects in
     materials and workmanship and shall conform to the BTS specifications or,
     to OMNIPOINT's then current authorized, written functional BTS
     specifications.  OMNIPOINT's sole obligation and Ericsson's sole remedy
     under this warranty are limited to the repair or replacement, at
     OMNIPOINT's option, of the defective BTS or BTS component.  Ericsson shall
     be responsible for actually removing and replacing any defective BTS.
     OMNIPOINT's obligation and Ericsson's remedy under this Section 9.1 are
     conditioned upon:

     (a) OMNIPOINT's receipt of written notice of a defect from Ericsson within
     the applicable Warranty Period; and

     (b) the BTS not having been altered or repaired by others without
     OMNIPOINT's written consent; and

     (c) the alleged defect not being the result of mishandling, improper
     servicing or improper operation including use in conjunction with hardware
     electrically or mechanically incompatible.



                                     -19-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

     This warranty shall survive inspection, acceptance and payment.  The
     performance by OMNIPOINT of its obligations hereunder shall not extend the
     Warranty Period.  Any BTS repaired or replaced during the Warranty Period
     shall continue to be warranted for the balance of the Warranty Period. *

     OMNIPOINT agrees that, with respect to all resales of fully operational
     BTSs by Ericsson to Omnipoint Communications Inc. in connection with sales
     of equipment under the Infrastructure Supply Agreement, the Warranty Period
     for BTSs hereunder shall be the same as the warranty period extended by
     Ericsson to Omnipoint Communications Inc. under the Infrastructure Supply
     Agreement.

9.2  OMNIPOINT warrants to Ericsson that all BTSs shipped pursuant to this
     Agreement will be manufactured and/or assembled from new and unused
     components.  In warranty replacement situations, OMNIPOINT shall be
     permitted to use equivalent to new parts in the place of new parts and
     shall track these warranties through the use of Serial Numbers and date
     codes.  Ericsson shall have the right to audit this process at any time
     during normal working hours, subject to prior notification of

9.3  No BTS shall be returned to OMNIPOINT without OMNIPOINT's prior
     authorization.  OMNIPOINT shall have the option of repairing or replacing
     the defective BTS at OMNIPOINT's factory or at Ericsson's or at a
     Customer's facilities, upon the prior written consent of the party from
     which the Customers of the defective BTSs received such BTS.  In any event,
     the costs and risk of loss associated with shipping defective BTS to
     OMNIPOINT's factory shall be borne by Ericsson.  Costs and risk of loss
     associated with returning repaired or replacement BTS to Ericsson shall be
     borne by OMNIPOINT.  OMNIPOINT shall return the repaired BTS or a
     replacement within the applicable Warranty Repair Period.



                                     -20-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION


9.4  OMNIPOINT shall send all change notices to the following Ericsson
     personnel, which may be amended from time to time.

               Ericsson Inc.
               Radio Systems
               740 East Campbell Road
               Richardson, Texas  75801
               Attention:  Purchasing Manager


10.  SOFTWARE PERFORMANCE WARRANTY
     -----------------------------

10.1 OMNIPOINT warrants that, during the applicable Warranty Period, each
     Program will under normal use and service be free of defects in materials
     and workmanship attributable to OMNIPOINT and shall conform to the BTS
     Specifications or, in the case of Software added to Appendix A after the
     effective date of this Agreement, to OMNIPOINT's then current authorized,
     written functional BTS Specifications relating to such Software.  This
     warranty is applicable only so long as Ericsson does not make modifications
     or enhancements to, or translations of, the Program(s) as originally
     delivered by OMNIPOINT.  A master copy of each Update created and issued by
     OMNIPOINT for each Program or Version Release licensed by Ericsson shall be
     provided to Ericsson within fourteen (14) days of its completion by
     OMNIPOINT.  The performance by OMNIPOINT of its obligations hereunder shall
     not extend the Warranty Period *

     days, whichever is longer.

10.2 The exclusive remedy of Ericsson and the sole measure of recoverable damage
     by Ericsson of the Software warranty is the repair or replacement by
     OMNIPOINT, at OMNIPOINT's risk and expense, of any program containing
     critical and/or serious problems and the correction of any substantive
     incompleteness and/or inaccuracy in the User Manual(s), if any, as quickly
     as practicable following the date on which OMNIPOINT receives written
     notice regarding the existence of any such critical problem, and in the
     case of a serious problem, with the next Update or Version Release to be
     issued by OMNIPOINT.  OMNIPOINT will establish procedures designed to
     minimize its response times for Software warranty claims.  Remedy is
     provided only if (a) Ericsson notifies OMNIPOINT in writing of any claim of
     defect in a Program or a substantive incompleteness and/or inaccuracy in
     the User Manual for a Program within the Warranty Period, (b) the Program
     and/or User Manual is returned to OMNIPOINT at Ericsson's risk and expense
     after authorization for its return is obtained from OMNIPOINT (repaired or
     replacement Programs and/or corrections for User Manuals will be shipped to
     Ericsson at OMNIPOINT's risk and expense), and (c) upon examination by
     OMNIPOINT, the Program(s) and/or User Manual(s) are found to contain
     critical problems and/or the User 

     

                                     -21-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION
   
     Manuals are found to contain substantive inaccuracies or are incomplete or
     are inaccurately reproduced.


11.  LIMITATION OF WARRANTY; LIMITATION OF LIABILITY
     -----------------------------------------------

     THE WARRANTIES SET FORTH IN SECTION 9 AND SECTION 10, RESPECTIVELY, OF THIS
     AGREEMENT CONSTITUTE THE ONLY LIABILITIES OF OMNIPOINT FOR BREACH OF
     WARRANTY AND ARE IN LIEU OF ALL OTHER WARRANTIES, WRITTEN OR ORAL,
     STATUTORY, EXPRESS OR IMPLIED, IN REGARD TO BTSs AND SOFTWARE, INCLUDING
     THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     PURPOSE.  NEITHER PARTY SHALL BE LIABLE FOR ANY LOSS OF DATA, LOSS OF
     PROFITS, LOSS OF GOODWILL OR ANY OTHER INCIDENTAL, CONSEQUENTIAL OR SPECIAL
     DAMAGES OF ANY NATURE WHATSOEVER FOR ANY ACTION ARISING UNDER THIS
     AGREEMENT, EXCEPT IN THE CASE OF A BREACH BY A PARTY OF ITS OBLIGATIONS
     UNDER SECTIONS 2.3, 14, 16, 20 or 23.


12.  POST WARRANTY SUPPORT SERVICES
     ------------------------------

12.1 *                                                            prior
     to the First Commercial Production Date, Ericsson and OMNIPOINT shall
     negotiated in good faith and mutually agree upon the nature and level of
     post-warranty support to be provided by OMNIPOINT hereunder.  At such time
     as Ericsson and OMNIPOINT reach mutual agreement upon the nature and level
     of post-warranty support to be provided by OMNIPOINT, the obligations of
     OMNIPOINT shall be specified in Appendix H to this Agreement.

12.2 *              following the expiration of the Warranty Period, 
     OMNIPOINT shall offer to Ericsson and Customers, as appropriate, all out-of
     warranty support services normally offered to OMNIPOINT's customers at
     OMNIPOINT's then current prices under like conditions. After
     discontinuation of OMNIPOINT support, OMNIPOINT shall make available to
     Ericsson, on reasonable terms, documentation so that Ericsson can
     independently service and support a BTS.



                                     -22-
<PAGE>
 
12.3 Each party shall designate one (1) senior representative for the purpose of
     discussing and resolving OMNIPOINT BTS warranty and technical support
     issues and disputes. The senior representatives of the parties shall meet
     (face to face or through telephone conferences) on an as needed basis and
     shall discuss, in general, the matters related to technical support and
     issues and disputes brought to their attention by their respective
     organizations. Agreements reached by the senior representatives related to
     technical support shall be final. As of the Effective Date, the names of
     the senior representatives of the parties are as follows:

     for Ericsson:

          Ericsson Inc.
          Radio Systems
          740 East Campbell Road
          Richardson, Texas  75801
          Attention:  Purchasing Manager

     and

     for OMNIPOINT:

          Omnipoint Corporation
          1365 Garden of the Gods Road
          Colorado Springs, Colorado  80907
          Attention:  Alan Longshore
          Fax:  (719) 548-1393
          Telephone:  (719) 548-1200

13.  TECHNICAL ASSISTANCE
     --------------------

13.1 During the term OMNIPOINT shall make available to Ericsson to the extent
     reasonably possible, upon the latter's written request, technical
     assistance to facilitate the integration, sale, lease and/or distribution
     of BTSs.

13.2 Such technical assistance as may be available shall be scheduled by
     OMNIPOINT to serve the needs of Ericsson but not so as to unduly
     inconvenience OMNIPOINT.

13.3 Technical assistance shall include both technical services and consulting
     services of OMNIPOINT and visits of Ericsson's engineering, technical and
     testing personnel to OMNIPOINT's facilities.

13.4 OMNIPOINT shall be paid in return for such services and visits based on
     OMNIPOINT's then current list prices therefor, and shall be reimbursed for
     all reasonable travel, living

                                     -23-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

     and out-of-pocket expenses of the personnel rendering such services.
     Invoices shall be rendered by OMNIPOINT to Ericsson for such technical
     assistance and reimbursement of expenses, and shall be paid by Ericsson *  
                                      after receipt of the invoice therefor. 
     Notwithstanding the foregoing, OMNIPOINT shall *

14.  PRODUCT DOCUMENTATION
     ---------------------

14.1 On or before the date on which OMNIPOINT is scheduled to deliver the BTSs
     to Ericsson for BTS verification tests, OMNIPOINT shall deliver to Ericsson
     a master copy of the Product Documentation in commercially usable size and
     format and shall thereafter in a timely manner, provide Ericsson with all
     necessary amendments and updates thereto.  Such Product Documentation shall
     be considered Confidential Information hereunder unless such Product
     Documentation is marked by OMNIPOINT as "Suitable for Distribution."

14.2 Ericsson shall have the right to make copies of any Product Documentation
     marked "Suitable for Distribution" and distribute such copies to its
     Customers, and, subject to the prior written approval of OMNIPOINT, shall
     have the right to reformat and package such Product Documentation, make
     copies thereof, modify as necessary and distribute such copies to its
     Customers.

14.3 OMNIPOINT shall deliver to Ericsson interim draft copies of the Product
     Documentation as soon as reasonably available.


15.  INCOMING INSPECTION
     -------------------

     All BTSs shall be subject to inspection at the Delivery Location and such
     inspection shall be deemed to occur *
     If a BTS does not conform to the requirements of an Order the entire
     quantity delivered may be returned to OMNIPOINT at Ericsson's expense,
     provided that any replacement Order shall be shipped at OMNIPOINT'S
     expense.  Payment shall neither be deemed to constitute acceptance nor be a
     waiver of Ericsson's right to cancel any Order or Release.  Nothing herein
     shall be deemed to lessen Ericsson's rights under this Agreement.

16.  OWNERSHIP OF MARKS, COPYRIGHTS, TRADE SECRETS AND LABELING
     ----------------------------------------------------------

16.1 Ericsson hereby acknowledges and agrees that nothing herein grants to it
     any right, title or interest in the Marks or in OMNIPOINT's copyrights for
     the Software and that upon

                                     -24-
<PAGE>
 
     termination of this Agreement by expiration or for any other reason,
     Ericsson shall no longer use the Marks in advertising or in any other
     manner.  Ericsson shall not challenge the validity of OMNIPOINT's ownership
     of or right to use any of the Marks or OMNIPOINT copyrights, nor otherwise
     impair the interest of OMNIPOINT in the Marks or such copyrights.  Ericsson
     shall not use any mark which is confusingly similar to, or a colorable
     imitation of, any Mark.  Except as otherwise set forth herein, no license
     or other grant is expressed or implied to Ericsson (i) to change or
     otherwise modify the Program(s) or the User Manual(s), or (ii) to know,
     use, reproduce, copy, market, sell, disclose or distribute the source code
     form of any Program of OMNIPOINT received under this Agreement, if any.

16.2 Ericsson shall remain obligated, both during the Term and thereafter, to
     hold in strict confidence its knowledge of the BTSs as a trade secret for
     the benefit of OMNIPOINT, and Ericsson shall treat such information in the
     same manner in which it treats its own trade secrets, including instituting
     and maintaining all appropriate security measures in order to protect the
     confidential, proprietary trade secrets of OMNIPOINT with respect to the
     BTSs.

16.3 OMNIPOINT agrees to affix, upon each BTS supplied to Ericsson, the
     appropriate Ericsson insignia as specified in written instructions from
     Ericsson, and shall be marketed by Ericsson directly or indirectly to
     Customers.

17.  QUALITY STANDARDS
     -----------------

     Ericsson acknowledges and agrees that OMNIPOINT is not presently in
     compliance with the ISO 9001 manufacturing quality standards.  OMNIPOINT
     agrees that it shall employ commercially reasonable efforts to achieve and
     maintain manufacturing quality standards equivalent to ISO 9001.

18.  REPORTS AND AUDITS
     ------------------

18.1 OMNIPOINT shall submit monthly to Ericsson   a report showing for each
     Ericsson location the Orders and Releases issued and BTSs delivered during
     the immediately preceding month, the status of the undelivered portion of
     any past due Order or Release and any other similar information as may
     reasonably be requested by Ericsson from time to time.

18.2 Ericsson shall submit the reports required pursuant to Sections 4.2, 4.3,
     8.3 and 8.4.

18.3 Ericsson shall keep full, true and accurate books of account containing all
     particulars that may be necessary for the purpose of showing the amounts
     payable to OMNIPOINT hereunder.  Such books and the supporting data shall
     be open and made available, at all 

                                     -25-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

     reasonable times and upon reasonable notice during the Term of this
     Agreement and for *
     after its termination or expiration, to the inspection of a firm of
     certified public accountants selected by OMNIPOINT and reasonably
     acceptable to Ericsson, the cost of which is to be paid by OMNIPOINT, for
     the purpose of verifying the amounts paid to OMNIPOINT hereunder; provided,
     however, that such examination shall not take place more often *
 
                             In the event any such audit reveals a deficiency in
     the amounts paid to OMNIPOINT by Ericsson for the period covered by the
     audit, Ericsson shall pay to OMNIPOINT *
      
                         If Ericsson notifies OMNIPOINT of its disagreement with
     the results of the audit *          then disputed amounts shall
 
                         In the event any such audit reveals a
     deficiency *        of the amounts paid to OMNIPOINT by Ericsson for the
     period covered by the audit,  Ericsson shall pay,
     interest, the fees and expenses of such accountants


19.  TERMINATION
     -----------

19.1 In the event of any material breach of this Agreement by either party,
     which breach shall continue for *              or more days after written
     notice of such breach (including a reasonably detailed statement of the
     nature of such breach) shall have been given to the breaching party by the
     aggrieved party, the aggrieved party shall be entitled to avail itself
     cumulatively of any and all remedies available at law or in equity and:

     (a)  if the aggrieved party is Ericsson, Ericsson may (i) *
 
               or (ii) cancel any *                      outstanding by Ericsson
 
               for so long as the breach continues uncorrected; and *

     (b)  if the aggrieved party is OMNIPOINT, OMNIPOINT may (i) *
 
                                    or (ii) suspend performance under any *
 
                          for so long as the breach continues uncorrected.

19.2 Ericsson may terminate this Agreement if OMNIPOINT is or becomes a party to
     any bankruptcy or receivership proceeding which is uncontested by OMNIPOINT
     for fifteen (15) days, or, if contested, is not remedied within sixty (60)
     days, or if OMNIPOINT seeks to make a compromise, arrangement or assignment
     for the benefit of its creditors or if a receiver or receiver-manager is
     appointed over any of OMNIPOINT's assets.

19.3 OMNIPOINT may terminate this Agreement if Ericsson is or becomes a party to
     any bankruptcy or receivership proceeding which is uncontested by Ericsson
     for fifteen (15)

                                     -26-
<PAGE>
 
     days, or, if contested, is not remedied within sixty (60) days, or if
     Ericsson seeks to make a compromise, arrangement or assignment for the
     benefit of its creditors or if a receiver or receiver-manager is appointed
     over any of Ericsson's assets.

19.4 Upon any termination of this Agreement, each party shall return to the
     other party all property owned by that other party, including all copies of
     all items containing "Confidential Information" of the other party, except
     as specifically elsewhere provided herein.  Both parties shall fulfill any
     obligations pursuant to Sections 5 and 7 then outstanding.

19.5 In the event either party wishes to terminate this Agreement either in its
     entirety for reasons not expressly provided for in this Agreement, it shall
     so advise the other party in writing and, forthwith thereafter, the parties
     shall negotiate in good faith (without prejudice to other rights they may
     have under this Agreement) a mutually satisfactory arrangement for such
     termination.  In the event the parties are unable to reach a mutually
     satisfactory arrangement within sixty (60) days of the commencement of such
     negotiations, then the party having given the notice contemplated above in
     this Section 18.5 shall have the right to terminate this Agreement upon
     further notice to the other party given within the immediately succeeding
     thirty (30) days, such termination to become effective two hundred seventy
     (270) days from the date of such further notice.

19.6 In the event of a sale of OMNIPOINT, all contractual obligations as related
     to this Agreement shall be transferred to the new ownership.


20.  INFORMATION EXCHANGES
     ---------------------

     Ericsson and OMNIPOINT shall hold all technical and commercial information,
     documentation and know-how of every kind and description, whether oral or
     written, that is received from each other, whether received before or after
     execution of this Agreement, in strictest confidence as being confidential
     and the exclusive property of the disclosing party or as representing trade
     secrets of the disclosing party ("Confidential Information").  The parties
     executed a mutual non-disclosure Agreement on June 16, 1993 (the
     "Confidentiality Agreement"), a copy of which is attached hereto as
     Appendix G, and the terms and conditions of the Confidentiality Agreement
     are incorporated herein by reference as though repeated and restated in
     their entirety herein.  Accordingly, the parties agree that the treatment
     of all Confidential Information disclosed to one another pursuant to this
     Agreement shall be governed and controlled by the terms and conditions of
     the Confidentiality Agreement and that the terms thereof shall remain in
     full force and effect for the term of this Agreement.

     During the Term of this Agreement, Ericsson shall take reasonable,
     commercial steps to ensure that Customers agree in the case of the Programs
     not to translate, decompile,

                                     -27-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION; 
                        HAS BEEN OMITTED AND FILED 
                        SEPARATELY WITH THE COMMISSION

     disassemble, reverse engineer, create derivative works or take any steps
     intended to produce a source language statement of the object code version
     of the Programs.

     The parties agree that any breach of this Section 19 will constitute
     irreparable harm, and that either party shall be entitled to specific
     performance or injunctive relief to enforce this Section 19 in addition to
     whatever remedies such party may otherwise be entitled to at law or in
     equity.


21.  CLASS A CHANGES *
     ---------------

               or sale of any BTS by OMNIPOINT hereunder, OMNIPOINT shall
     provide Class "A" BTS changes to Ericsson consistent with the procedures
     for such changes as set forth in Appendix F, "Class A Changes."

22.  PATENT. COPYRIGHT AND INTELLECTUAL PROPERTY RIGHTS INDEMNIFICATION
     ------------------------------------------------------------------

22.1 OMNIPOINT agrees to indemnify and hold Ericsson harmless as set forth below
     from damages and costs (including reasonable attorney's fees) awarded from
     claims, suits or proceedings brought against Ericsson or its Customers
     based on a claim that the sale or use of the BTSs or of any portion
     thereof, excluding Ericsson Equipment, infringes any registered copyright,
     trademark, patent or other intellectual property, or breaches any trade
     secret, of any third party, which intellectual property right is in force
     within the United States at the time in which the BTSs are manufactured,
     sold or used, provided that OMNIPOINT is informed promptly in writing of
     such claim, suit or proceeding and furnished a copy of each communication,
     notice or other action relating to the alleged infringement and is given
     all authority, information and assistance (at OMNIPOINT's expense)
     necessary to defend or settle such claim, suit or proceeding.  In the case
     of such a claim by a third party, OMNIPOINT shall, at its option:

     (a)  defend and settle at its expense any claim, suit or proceeding brought
     against Ericsson, which claim, suit or proceeding is based on a claim as
     previously stated, and OMNIPOINT shall pay all damages and costs that
     finally are awarded against Ericsson in such a proceeding or suit; or

     (b)  replace at its own cost such infringing BTS or any portion thereof
     with a BTS or portion thereof which does not infringe any intellectual
     property rights, or change the BTSs so as to avoid intellectual property
     infringement, provided that form, fit and function of the BTSs are not
     materially affected by such change or replacement; or

     (c)  purchase on behalf of Ericsson the right to continued sale or use
     without additional cost or fee for Ericsson.

                                     -28-
<PAGE>
 
     In the event that OMNIPOINT is unable to perform under clauses (a), (b) and
     (c) above, OMNIPOINT shall accept the return of the infringing portion of
     the BTSs and repay Ericsson an amount equal to the depreciated value of
     such BTS after deducting the time for Ericsson's and its Customers'
     uninterrupted use and operation of the BTS prior to the time of any final
     adjudication of infringement.

     Ericsson acknowledges and agrees that the indemnification provided by
     OMNIPOINT under this Section 22.1 does not apply to any claim made against
     Ericsson arising from modifications Ericsson makes to a third party's
     equipment (e.g., a BSC) necessary for Ericsson to use a BTS.

22.2 The preceding paragraph shall not apply to any claim based upon (i)
     compliance with designs, plans or specifications of Ericsson to the extent
     compliance with such designs, plans or specifications cause any
     infringement as specified in Section 22.1, (ii) use of the BTS in
     combination with devices or products not purchased and/or licensed
     hereunder where the BTS would not itself be infringing, (iii) use of the
     BTS in an application or environment for which such BTS was not designed or
     contemplated, (iv) modifications of a BTS by Ericsson or a Customer, or (v)
     any claims of infringement of a patent, copyright or trade secret in which
     Ericsson or any affiliate or Customer of Ericsson has a controlling
     interest or license which would negate the alleged infringement. Where and
     to the extent the use of any design, specification or combination by
     Ericsson results in infringement, Ericsson shall indemnify and hold
     OMNIPOINT harmless against any infringement claims arising from the use of
     such design, specification or combination.

23.  LEGAL AND REGULATORY COMPLIANCE
     -------------------------------

23.1 At no additional charge to Ericsson, OMNIPOINT shall comply in all material
     respects with and obtain all licenses and permits required by the relevant
     United States governmental authorities in order to perform its obligations
     hereunder, and shall comply in all material respects with all applicable
     United States governmental regulations.  A BTS shall comply in all material
     respects with all applicable United States federal laws and governmental
     orders and regulations in effect at the time of shipment of a BTS.  At
     OMNIPOINT's expense, Ericsson shall use reasonable efforts to assist
     OMNIPOINT in obtaining any such approvals, permits or licenses required.

23.2 At no additional charge to OMNIPOINT, Ericsson shall comply in all material
     respects with and obtain all licenses and permits required by the relevant
     governmental authorities in order to perform its obligations hereunder, and
     shall comply in all material respects with all applicable governmental
     regulations.  At Ericsson's expense, OMNIPOINT shall use reasonable efforts
     to assist Ericsson in obtaining any such approvals, permits or licenses
     required.

                                     -29-
<PAGE>
 
23.3 Ericsson acknowledges that exportation of the information, industrial and
     intellectual property rights and documentation relating to the BTSs may be
     subject to compliance with the Export Administration Act of 1979 of the
     United States of America, as amended, and the rules and regulations
     promulgated from time to time thereunder (collectively, the "Export Act"),
     which restrict exports and reexports of software media, technical data and
     direct products of technical data. If a license is required under the
     Export Act before OMNIPOINT can transfer the information, industrial or
     intellectual property rights or documentation relating to the BTSs to
     Ericsson, Ericsson understands and acknowledges that no such transfer can
     occur until such license is obtained. In the event that a license is so
     required, OMNIPOINT (with the reasonable assistance of Ericsson) shall use
     its reasonable best efforts to obtain such license.

23.4 Ericsson agrees not to knowingly export or reexport the information,
     industrial or intellectual property rights or documentation relating to the
     BTSs or any part thereof or any direct product thereof, directly or
     indirectly, without first obtaining permission to do so from the United
     States Office of Export Administration or other appropriate government
     agencies, into any of those countries listed from time to time at the time
     of any shipment of BTSs in supplements to Part 370 to Title 15 of the Code
     of Federal Regulations of the United States as "prohibited or restricted"
     countries or any other country to which exports or reexports may be
     restricted (collectively, "Prohibited Countries"). Ericsson agrees not to
     distribute or supply the BTSs to any person if Ericsson has reason to
     believe that such person intends to export, reexport or otherwise take the
     same to, or to use the same in, any of the Prohibited Countries. Ericsson
     agrees to indemnify and hold OMNIPOINT harmless from or in connection with
     any violation of this Section by Ericsson. Without limitation of the
     foregoing, each party agrees to commit no act which, directly or
     indirectly, would cause the other party to violate any applicable law,
     regulation, treaty or agreement relating to the export or reexport of the
     BTSs.


24.  HAZARDOUS MATERIAL
     ------------------

     OMNIPOINT shall supply to Ericsson a list of all materials incorporated
     into a BTS which are classified as toxic or hazardous under applicable laws
     and regulations, information on the safe handling of each BTS and any
     pertinent information concerning any adverse effects on people or the
     environment that may result from use of, exposure to, or disposal of such
     BTS. OMNIPOINT warrants to Ericsson that each BTS provided by OMNIPOINT is
     safe for its normal use. OMNIPOINT shall indemnify Ericsson for any
     expenses that Ericsson may incur by reason of recall or prohibition of use
     of a BTS. Ericsson shall cooperate with OMNIPOINT to facilitate and
     minimize the expense of any recall or prohibition against such use.

                                     -30-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION


25.  FORCE MAJEURE
     -------------

     If the performance of this Agreement or any obligation hereunder except for
     the obligations set forth in Sections 6 and 8 is prevented, restricted or
     interfered with by reason of any circumstance beyond the reasonable control
     of the party affected including, but not limited to, fires, breakdown of
     plant, labor disputes, embargoes, government ordinances or requirements,
     civil or military authorities, acts of god or of the public enemy, acts or
     omissions of carriers, or inability to obtain necessary materials or
     services from suppliers, then the party affected shall be excused from such
     performance on a day-for-day basis to the extent of such interference (and
     the other party shall likewise be excused from performance on a day-for-day
     basis to the extent such party's obligations relate to the performance so
     interfered with); provided that the party so affected shall use reasonable
     efforts to remove such causes of non-performance.


26.  ARBITRATION
     -----------

     In the event any disagreement should arise between the parties, whether as
     to the interpretation or operation of this Agreement, or any rights or
     obligations hereunder, such disagreement shall be finally settled in
     Washington, D.C. under the rules of the American Arbitration Association.
     This Section shall not limit the right of either party to seek injunctive
     relief from a court of law.


27.  MARKETING EFFORTS. Ericsson and OMNIPOINT shall cooperate with each other
     on the marketing and development of IS-661 based equipment and the parties
     shall negotiate in good faith the formulation and execution of agreements
     governing the collaborative marketing, deployment and industrialization of
     IS-661 based equipment and the joint marketing of such IS-661 based
     equipment.

     Ericsson and OMNIPOINT will cooperate on technical trials of IS-661 based
     equipment and technology *                               Ericsson and 
     OMNIPOINT will co-market IS-661 based PCS systems *

                                     -31-
<PAGE>
 
28.  GENERAL
     -------

28.1 Any notices to be given under this Agreement, except for notices under
     Sections 3.2 and 4.10, shall be sent by facsimile, reliable overnight
     courier or hand delivery to the other party at the following addresses to
     the attention of:

          If to OMNIPOINT:

               Omnipoint Corporation
               1365 Garden of the Gods Road
               Colorado Springs, Colorado  80907
               Fax:  (719) 548-1393
               Telephone:  (719) 548-1200

               with a copy to:

               Edwin M. Martin, Jr.
               Piper & Marbury L.L.P.
               1200 Nineteenth Street, N.W.
               Washington, DC  20036
               Fax:  (202) 223-2085
               Telephone:  (202) 861-3900

          If to Ericsson:

               Ericsson Inc.
               Radio Systems
               740 East Campbell Road
               Richardson, Texas  75801
               Attention:  General Counsel

28.2 Notices shall be deemed to have been received one Business Day after
     sending if given by facsimile or overnight courier or upon delivery if
     given by hand.

28.3 The failure of a party to enforce any provision of this Agreement shall not
     constitute a waiver of such provision or the right of such party to enforce
     such and every other provision.

28.4 The validity, interpretation and performance of this Agreement, the rights
     and obligations arising hereunder and any purchase made hereunder shall be
     governed by the laws of the State of New York without reference to the
     UNCITRAL Conventions on Contracts for the International Sale of Goods.

                                     -32-
<PAGE>
 
28.5 Neither party shall assign this Agreement or any rights hereunder or
     subcontract any of its obligations under this Agreement without the prior
     written consent of the other party, such consent not to be unreasonably
     withheld. Notwithstanding anything to the contrary contained in the
     previous sentence, Ericsson acknowledges and agrees that OMNIPOINT
     presently has, or in the future may have, contractual agreements with
     certain vendors, including Nortel, for the production and manufacture of
     BTSs and BTS components, and Ericsson hereby consents to OMNIPOINT
     contracting with such vendors for the production and manufacture of BTSs
     and BTS components. Notwithstanding the restrictions on assignment
     contained in the first sentence of this subsection 27.5, either party may
     assign this Agreement in the event of a bona fide sale of the party to a
     third party, and both parties consent in advance to an assignment of this
     Agreement in the event of such bona fide sale of the other party to a third
     party.

28.6 Section headings are inserted for convenience only and shall not be used to
     interpret this Agreement.

28.7 All obligations and liabilities which, by their nature, are intended to
     survive the expiration or termination of this Agreement shall remain in
     effect beyond any expiration or termination of this Agreement.

28.8 If any provision of this Agreement is or becomes illegal or unenforceable
     in whole or in part in a country, the remaining provisions shall
     nevertheless be valid and binding with respect to that country so long as
     they continue to express the original intent of the parties. If not, this
     Agreement shall not apply in that country, but the parties shall negotiate
     in good faith to extend the benefit of this Agreement to that country in
     some other manner.

28.9 This Agreement and the Appendices to it, together with the [Insert name of
     all agreements] entered into on the date hereof, constitute the entire
     agreement between the parties on the subject matter hereof and supersede
     all prior agreements and communications. This Agreement may not be modified
     except by means of an amendment which expressly references this Agreement
     and is duly executed by each of the parties.

                                     -33-
<PAGE>
 
IN WITNESS WHEREOF, the parties hereto have signed this Agreement by their duly
authorized representatives.


ERICSSON INC.                   OMNIPOINT CORPORATION

By: /s/ Bo Hedfors              By: /s/ George F. Schmitt
    -------------------------       ------------------------------

Print Name: Bo Hedfors          Print Name: George F. Schmitt
            -----------------               ----------------------

Title: President                Title: President
       ----------------------          ---------------------------
 
Date: April 16, 1996            Date: April 16, 1996
      -----------------------         ----------------------------

                                     -34-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION


                                   APPENDIX A
                                   ----------

                     BASE TRANSCEIVER STATION (BTS) PRICES


A.   Ericsson shall pay to OMNIPOINT the greater of *
 
 
 
                                    Upon shipment OMNIPOINT shall invoice
Ericsson the following: *

 



B.   OMNIPOINT and Ericsson shall establish and mutually agree upon *
          to the First Commercial Production Date, and such prices shall be set
forth Appendix I hereto.  Subsequent                                 shall be
negotiated as provided in Section 7.2 and shall be attached hereto as Appendix
J.

C. *



D.   If the Corrected Amount is greater than the Amount Paid, Ericsson shall pay
the difference to OMNIPOINT; if the Amount Paid is greater than the Corrected
Amount, Ericsson shall take the credit against the next payment to OMNIPOINT of
an invoiced amount.

E.   At the written request of either Party, the negotiations contemplated in
paragraph B of this Appendix A shall commence within *

          Any such renegotiated Benchmark Price shall be added hereto by
amendment.  Until the Parties agree to renegotiated Benchmark Prices, the
Benchmark Prices, as previously amended, shall remain in effect.
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

     In determining the Benchmark Prices to be renegotiated, the parties shall 
consider the following:

     (a) the prices are intended to provide OMNIPOINT a *













                                      A-2
<PAGE>
 
                                   APPENDIX B
                                   ----------
                                        

                     SOFTWARE LICENSE AGREEMENT PROVISION

SOFTWARE; CONFIDENTIAL INFORMATION

       SOFTWARE LICENSE. Subject to the limitations of this Agreement and
       payment in full of the applicable license fee(s), Seller grants Buyer a
       non-exclusive, nontransferable license to use Software (including
       Software Updates, Software Enhancements and  Software Features) delivered
       to Buyer under this Agreement solely in conjunction with the operation of
       the System. Any other intended use of the Software not specifically
       authorized herein shall be subject to a separate licensing arrangement
       between Seller and Buyer.

       OWNERSHIP OF SOFTWARE. Buyer acknowledges that the Software is the
       property and confidential proprietary information of Seller, Seller's
       suppliers, or third party licensors, title and ownership rights to
       Software, including any reproductions, modifications or derivatives
       thereof, shall remain at all times with Seller, Seller's suppliers, or
       third party licensors, as applicable. Buyer may not sell, assign,
       transfer, sublicense, or otherwise make available the Software to any
       third party (except as provided herein) without the consent of the owner
       of the Software, nor shall Buyer adapt or create any derivative work
       using Software or decompile or reverse engineer the Software, without the
       prior written consent of Seller.  In no event may Buyer sell, assign,
       transfer, license, or otherwise make available any of the Software to any
       person not purchasing the System, without the consent of the owner of the
       Software. Buyer may not copy or duplicate the Software, except that Buyer
       may make one (1) copy of the Software solely for back-up or archival
       purposes, provided that such copy bears such copyright or other
       proprietary notices as are contained on the original copy (or as Seller
       may reasonably require from time to time). Buyer shall not alter or
       remove any copyright or other proprietary notices on or in copies of the
       Software. Except as expressly permitted in this Agreement, Buyer agrees
       not to disclose or cause to be disclosed the Software to any person other
       than employees or contractors of Buyer duly authorized to use the
       Software on Buyer's behalf and who have been informed by Buyer of the use
       and disclosure restrictions set forth herein.

       HARDWARE LIMITATION. The Software supplied under this Agreement shall
       not, without the prior written consent of the Seller, or the owner of the
       Software if different from the Seller, be implemented on or used to
       directly control hardware other than that purchased under this Agreement.

       SOFTWARE TRANSFER. Buyer may transfer this Software license to any
       subsequent purchasers of the System from Buyer without further approval
       of Seller provided the 


<PAGE>
       subsequent purchasers are not direct competitors of Seller and further
       provided the subsequent purchasers agree in a writing delivered to Seller
       to assume Buyer's obligations set forth in this Agreement relating to the
       Software.
                                                                 
       SOFTWARE ENHANCEMENTS AND FEATURES. Software Enhancements or Software
       Features may be ordered by Buyer at the prices set forth in Attachment
       __, and if not therein set forth, at Seller's then current prices
       therefor. Software Updates shall be provided to Buyer without charge
       during the Warranty period.  Thereafter, Software Updates shall be made
       available to Buyer pursuant to agreements for System Support Services.

       CONFIDENTIALITY. The parties agree, except as may be required to comply
       with any applicable law, regulation or order of any governmental or other
       authority, to:

       (a)    maintain, or cause to be maintained, the confidentiality of
              Confidential Matters of the other party and not disclose, or
              permit to be disclosed, any such Confidential Matters, unless
              authorized in writing by such other party;

       (b)    not use, or permit to be used, any such Confidential Matters,
              except in accordance with the scope of this Agreement;

       (c)    restrict, or cause to be restricted, disclosure of such
              Confidential Matters to those officers, employees and agents who
              need to know such Confidential Matters in the performance of work
              relating to the subject matter of this Agreement (it being
              understood that such officers, employees and agents shall be
              informed of the confidential nature of such Confidential Matters
              and shall be directed to treat such Confidential Matters
              confidentially and not use such Confidential Matters other than
              for the purpose described above); and

       (d)    take precautions necessary or appropriate to guard the
              confidentiality of such Confidential Matters.
                                            
       DISCLOSURE UNDER ORDER. In the event that any party hereto becomes
       obligated to disclose Confidential Matters pursuant to an order of any
       governmental or other authority, such party shall seek a protective order
       or other appropriate remedy that will permit such party to avoid such
       disclosure. In the event that such protective order or other remedy is
       not obtained, such party will disclose only that portion of the
       Confidential Matters as it is obligated to disclose pursuant to such
       order, and will use all reasonable efforts to obtain assurances that
       confidential treatment will be accorded to any Confidential Matters so
       disclosed.


                                      B-2
<PAGE>
 
       INJUNCTIVE RELIEF. Notwithstanding the provisions of Article ____ of this
       Agreement, the parties agree that Buyer or Seller may enforce provisions
       of this Article ___ by an action for injunctive relief or other equitable
       remedies.

       NO IMPLIED LICENSE GRANT. Except as expressly provided herein, nothing
       contained in this Agreement shall be construed or deemed to grant, either
       directly or indirectly or by implication, any license under any existing
       or future intellectual property rights of Seller.



                                      B-3
<PAGE>
 
                                   APPENDIX C

                ELECTRONIC DATA INTERCHANGE ("EDI") TRANSMISSION

This Appendix C contemplates the future issuance and transmission by electronic
means between OMNIPOINT and Ericsson of information and Orders, Blanket Orders,
(all hereinafter in this Appendix C referred to as "Orders"), acknowledgments
thereof by OMNIPOINT, and "Invoices."  The EDI transactions between OMNIPOINT
and Ericsson shall be in accordance with this Agreement.  This Appendix C shall
not apply to Orders delivered solely in hard copy document form.

OMNIPOINT and NT shall conduct EDI transactions by forwarding their EDI
transmissions through a third-party computer network with which Ericsson and
OMNIPOINT have a services agreement (the "Network").  Ericsson and OMNIPOINT
shall provide such authorization to the Network as may be necessary to
accomplish the electronic transmission of such party's data as contemplated
hereunder.

The EDI transactions between Ericsson and OMNIPOINT shall be made in accordance
with the version of the American National Standards Institute ("ANSI") Business
Data Interchange Standards ANSI X12, inclusive of transaction sets, data
dictionary, data elements and transmission control, unless other EDI
transmission standards are agreed to in writing by the parties.  Each party
shall be responsible for its respective costs incurred in sending and receiving
EDI transmissions.

Each Order placed through EDI transmission between Ericsson and OMNIPOINT shall
reference both the agreement number of this Agreement and the applicable
Ericsson Order number.  Drawings, specifications and the like that pertain to an
Order will not be sent by EDI transmission, but instead by TDI or delivered to
OMNIPOINT by Ericsson in tangible form referencing the Order number.  The
parties may, but shall not be required to, deliver hard copy documents of the
electronically transmitted Orders and acknowledgments thereto.

An Order (ANSI X12, Transaction Set 850) shall be transmitted electronically by
Ericsson to OMNIPOINT through the Network.  OMNIPOINT shall be required to
access at least once on each business day the agreed upon Network to determine
whether it has received any Orders.  A functional Acknowledgment of Receipt of
Transmission (ANSI X12, Transaction Set 997) shall be provided by the receiving
party to the sending party immediately upon receipt of an EDI transmission.  A
full Transaction Acknowledgment (ANSI X12, Transaction Set 855) shall be
transmitted by OMNIPOINT within two (2) business days after transmittal of the
functional Acknowledgment of Receipt of Transmission.
                                              
Each Order shall contain and each full Transaction Acknowledgment shall confirm
the price, quantity, Delivery Location, location to which the invoice shall be
rendered for payment, method
<PAGE>
 
of shipment, Delivery Date and/or Shipping Date.  In the event that OMNIPOINT
cannot comply with the price, quantity, and other terms referenced above as set
forth in the electronically transmitted Order, OMNIPOINT shall notify Ericsson
to that effect in the full Transaction Acknowledgment.  Upon such notification,
Ericsson shall, in addition to any remedies available to it under the Agreement,
have the option to require OMNIPOINT's compliance with the Agreement, accept
OMNIPOINT's revised order data, counter OMNIPOINT's revised Order data with a
modified Ericsson request, or cancel the Order in whole or in part.  Shipment of
BTSs shall be made by OMNIPOINT to Ericsson accordance with the terms of the
Agreement.

If Ericsson reschedules, cancels or otherwise changes an Order in accordance
with the terms of the Agreement, Ericsson will transmit electronically to
OMNIPOINT a Purchase Order Change (ANSI X12, Transaction Set 860) and OMNIPOINT
will transmit electronically a Purchase Order Change Acknowledgment (ANSI X12,
Transaction Set 865) to Ericsson within two (2) business days after receipt by
OMNIPOINT of the Purchase Order Change.

Any forecast information (ANSI X12, Transaction Set 830 with a quantity status
code of "D" shown in the applicable time period field on such Transaction Set)
provided to OMNIPOINT by Ericsson ordering location utilizing EDI transmission
is solely intended for use in OMNIPOINT's forward planning and is not to be
construed or interpreted as an Order or as a commitment by Ericsson to buy and
quantity of BTSs except as set forth in the Agreement.

A Transaction Set 830 Release (ANSI X12, Transaction Set 830 with a quantity
status code of "C" shown in the applicable time period field on such Transaction
Set) shall be provided to OMNIPOINT by Ericsson ordering location to confirm a
Delivery Date and/or Shipping Date for firm shipping quantities bought by
Ericsson pursuant to a Blanket Order where Ericsson requires that OMNIPOINT send
an Advanced Shipment Notice (ANSI X12, Transaction Set 856) prior to shipment.
Upon receipt of such Transaction Set 830 Release, OMNIPOINT shall thereafter
transmit to Ericsson such Advanced Shipment Notice not less than the number of
days agreed upon between the Delivery Location and OMNIPOINT prior to shipment
of the quantity of BTSs covered by such Transaction Set 830 Release.

Each party acknowledges and agrees that neither party shall have any liability
for Orders erroneously transmitted to or received due to the malfunction of or a
defect in the Network's system or other causes beyond the transmitting party's
reasonable control.  If OMNIPOINT receives a distorted EDI transmission,
OMNIPOINT shall promptly contract  the Network to reject the distorted
transmission and request that such transmission be resent.  If OMNIPOINT
receives an Order by EDI transmission stating a quantity and/or price
significantly higher or lower than the typical quantity and/or price shown on
Orders issued by Ericsson, OMNIPOINT shall promptly contract such ordering
location to confirm the accuracy of the electronically transmitted Order.

An "Invoice" (ANSI X12, Transaction Set 810) may be transmitted electronically
by OMNIPOINT to Ericsson through the Network.  Ericsson, when ordering under
this Agreement, shall be required to access at least once on each business day
the agreed upon Network to

                                      C-2
<PAGE>
 
determine whether it has received any invoices.  A functional acknowledgment of
receipt of transmission (ANSI X12, Transaction Set 997) shall be provided by the
receiving party to the sending party immediately upon receipt of an EDI
transmission.

Each Invoice shall contain at least the price per unit, quantity, invoice
number, invoice date, all relevant extra charges and taxes, purchase order
number, total invoice amount, unit of measure, packing slip number, and shipping
date.

Each party acknowledges and agrees that neither party shall have any liability
for Invoices erroneously transmitted to or received by Ericsson due to the
malfunction of or a defect in the Network's system or other causes beyond the
transmitting party's reasonable control.

Each party shall adopt as its signature an electronic identification consisting
of symbol(s) or code(s) which are to be affixed to or contained in each document
transmitted by such party ("Signatures").  Each party agrees that any Signature
of such party affixed to or contained in any transmitted document shall be
sufficient to verify that such party originated such document.  Each party shall
use reasonable efforts to not disclose the Signature of the other party to any
unauthorized third party.

This Appendix C shall evidence the intent of the parties to create binding
purchase and sale obligations pursuant to the electronic transmission and
receipt of documents specifying at a minimum the applicable terms which are
required by this Agreement to be included in such documents.

Any document properly transmitted pursuant to this Appendix C shall be
considered, in connection with any transaction and this Agreement, to be a
"writing" or "in writing"; and any such document when containing, or to which
there is affixed, a Signature ("Signed Documents") shall be deemed for all
purposes (a) to have been "signed" and (b) to constitute an "original" when
printed from electronic files or records established and maintained in the
normal course of business.

The conduct of the parties pursuant to this Appendix C, including the use of
Signed Documents properly transmitted pursuant to this Appendix C, shall, for
all legal purposes, evidence a course of dealing and a course of performance
accepted by the parties in furtherance of this Appendix C and this Agreement.

The parties agree not to contest the validity or enforceability of Signed
Documents under the provisions of any applicable law relating to whether certain
agreements are to be in writing or signed by the party to be bound thereby.
Signed Documents, if introduced as evidence on paper in any judicial,
arbitration, mediation or administrative proceedings, shall be admissible as
between the parties to the same extent and under the same conditions as other
business records originated and maintained in documentary form.  Neither party
shall contest the admissibility of copies of Signed Documents under either the
business records exception to the hearsay rule or the best evidence rule on the
basis that the Signed Documents were not originated or maintained

                                      C-3
<PAGE>
 
in documentary form.  In the absence of a notice that a transmitted electronic
document was received with garbled information or other evidence of faulty EDI
transmission, the originating party's records of the contents of an electronic
document so transmitted shall control in the event of a conflict between the
records of the parties as to such electronic document.

                                      C-4
<PAGE>
 
                                   APPENDIX D
                                   ----------
                                        
                            TECHNICAL SPECIFICATIONS
 
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

                                   APPENDIX E
                                   ----------
                                        
                               QUALITY STANDARDS

1.  Quality Standards.
    ----------------- 

     OMNIPOINT shall be required to have its processes for design, procurement,
     manufacturing, delivery and other related areas qualified to meet the
     requirements of Ericsson's corporate standard (as reasonably amended by
     Ericsson from time to time) and shall allow Ericsson reasonable access,
     upon five (5) Business Days notice, during normal business hours, to its
     facilities and data for source inspection and process audits, provided that
     in such cases Ericsson personnel involved shall be subject to OMNIPOINT's
     normal safety, security and confidentiality requirements and shall not
     unreasonably interfere with the business operations of OMNIPOINT.  Should
     Ericsson reasonably believe that a source inspection is necessary, such
     inspection may include a review of any or all function tests.

2.   Quality Measurements.
     -------------------- 

2.1  OMNIPOINT agrees to respond to quality concerns expressed by Ericsson,
     following receipt from Ericsson of appropriate data and suspect material,
     in the following manner: *



2.2  OMNIPOINT agrees to monitor and report to Ericsson BTS reliability
through laboratory testing.

<PAGE>
 
                                   APPENDIX F
                                   ----------
                                        
                                CLASS A CHANGES

1.   The following describes Class "A" change types and applications procedures
     for each:

1.1  Change Type "A"
     ---------------

     Changes which are needed to correct inoperative electrical or mechanical
     conditions, extremely unsatisfactory operating conditions, or conditions
     which result in safety hazards.  The use of the Class A designation has the
     following impact:

     (a)  Shipment of the affected BTS materials will stop until the change is
          incorporated.  Analysis will determine at what stage of production the
          change will be incorporated.  In many cases, the change may cause
          factory production of the affected BTSs to be stopped.

     (b)  OMNIPOINT-owned Products will be modified.

     (c)  Requires OMNIPOINT change notice action to inform Ericsson of the
          change.  This could possibly affect installation dates or necessitate
          origination of a remedial order to correct equipment which has been
          delivered to Ericsson.

     (d)  Requires OMNIPOINT action which assures Ericsson notification of Class
          A changes through change notice procedures.

     Application:  Immediate action shall be taken by OMNIPOINT and Ericsson to
     correct the condition on all jobs or BTSs in the hands of OMNIPOINT or
     Ericsson.

     Record:  No record of figures and options (such as wiring and apparatus)
     previously shown on the drawing shall be maintained.

1.2  Change Type "AC"
     ----------------

     Changes which are needed to correct inoperative electrical or mechanical
     conditions, or unsatisfactory maintenance or operating conditions, or
     conditions which result in safety hazards, except that the conditions are
     caused by circuit combinations or options which exist only on certain jobs
     or BTSs.

     To compensate for marginal (worse circuit) cases where the inoperative or
     unsatisfactory conditions exist on certain jobs or BTSs and are not or
     cannot be associated with specific circuit combinations or options, for
     example, high traffic usage problems (where a specific unit cannot meet the
     design intent), environmental problems (not including local 



                                      F-1
<PAGE>
 
     conditions under which a BTS was never intended to operate), etc. The
     applicable condition shall be described on the change authorization.

     Regardless of the condition, the use of the Class AC designation may have
     the following impact:

     (a)  Shipment of the affected BTS will stop until the change is
          incorporated.  Analysis will determine at what stage of production the
          change will be incorporated.  In many cases, the change may cause
          factory production of the affected BTS to be stopped.

     (b)  The BTS will be modified if specified in the change authorization.

     (c)  Requires OMNIPOINT change notice action to inform Ericsson of the
          change.  This could possibly affect installation dates or necessitate
          origination of remedial order to correct equipment which has been
          delivered to Ericsson.

     (d)  Requires OMNIPOINT action which assures Ericsson notification of
          changes through change notice procedures.

     Application:  Action shall be taken by OMNIPOINT and Ericsson to
     selectively correct the condition on those jobs or BTSs affected.  The
     charge shall be applied as specified in the change authorization.

     Record:  A detailed record of figures and options (such as wiring and
     apparatus) previously shown on the circuit drawing shall be maintained.

1.3  Change Type "AR"
     ----------------

     Changes which are needed to correct unsatisfactory electrical or
     mechanical, or unsatisfactory operating conditions, which may be allowed to
     exist on a temporary basis.  Regardless of the condition, the use of the
     Class AR designation has the same impact as Class A except that in some
     cases, jobs may be delivered to Ericsson without incorporating the change
     as noted under application.

     Application:  This change shall be made by Ericsson and OMNIPOINT on all
     jobs in the hands of Ericsson or OMNIPOINT as soon as possible.  Those jobs
     in the hands of OMNIPOINT shall have the change made before delivery to
     Ericsson except where delivery is approved by Ericsson, in which case the
     change shall be applied as soon as possible after delivery.

     Record:  No record of figures and options (such as wiring and apparatus)
     previously shown on the drawing shall be maintained.



                                      F-2
<PAGE>
 
2.   For Class A changes, OMNIPOINT shall perform replacements or repairs, at no
     charge to Ericsson.

     All changes that require only like-for-like circuit pack swap will be
     shipped to Ericsson.  Ericsson requirements for OMNIPOINT to be on-site to
     perform the circuit pack swaps will be a billable issue and Ericsson will
     be billed for job labor and expenses.



                                      F-3
<PAGE>
 
                                   APPENDIX G
                                   ----------
                                        
                        MUTUAL NON-DISCLOSURE AGREEMENT



                                      G-1
<PAGE>
 
                             OMNIPOINT CORPORATION
                             ---------------------
                        MUTUAL NON-DISCLOSURE AGREEMENT
                        -------------------------------
                                        

     This Agreement is made by and between ERICSSON NETWORK SYSTEMS, INC.
("Erisccon") its subsidiaries and affiliates a Delaware corporation, having its
principal place of business at 730 International Parkwat, Richardstown, Texas
75081 and OMNIPOINT CORPORATION ("Omnipoint") a Delaware corporation having its
principal place of business at 7150 Campus Drive, Suite 155, Colorado Springs,
CO 80920.

     The parties are evaluating the possibility of entering into a contractual
arrangement relating to the design, development and/or production of wireless
telecommunications services, products or equipment.  In furtherance of that
evaluation process and for such other purposes as the parties may agree in
writing, the parties may wish to disclose to each other Proprietary Information
(as defined below).

     Both parties acknowledge and agree that their relationship with respect to
such discussions and other exchanges of information is one of mutual trust and
confidence and that both parties will have, through such discussions and other
exchanges of information, access to Proprietary Information (as defined below).
Both parties agree that it and each of its officers, directors, employees,
agents, accountants and counsel will maintain the confidentially of all such
Proprietary Information as follows:

     1.  PROPRIETARY INFORMATION.   "Proprietary Information", for the purposes
of this Agreement, shall mean all information and know-how, whether ornot in
writing, disclosed by one party to the other party and relating to the business,
technical or financial affairs of the disclosing party or its subsidiarie,
affiliates, customers, potential customers, suppliers or potential suppliers.
Proprietary Information may include, by way of illustration and not limitation,
any invention, product, formula, method, technique, composition, compound,
project, development, plan, vendor information, customer information, apparatus,
equipment, trade secret, process, research, reports, clinical data, financial
data, technical data, computer program, software, software documentation,
hardware design, technology, marketing or business plan, forecast, unpublished
financial statement, budget, license, price, cost and personnel data.
Notwithstanding the public knowledge through legal means without fault by the
receiving party, is already public knowledge prior to the disclosing party's
disclosure of the same to the receiving party, or is known to the receiving
party to the disclosure of the same pursuant to this Agreement.



                                      -1-
<PAGE>
 
     2.   OBLIGATIONS.
          ------------

          a.   The receiving party will not disclose any of the disclosing
party's Proprietary Information or part thereof to others outside the receiving
party, and will not use the same for any purpose other than as expressly
contemplated by this Agreement.

          b.   The receiving party agrees that all files, letters, memoranda,
reports, records, data, sketches, drawings, labatory notebooks, program
listings, or other written, photographic, or other tangible material containing
disclosing party Proprietary Information which the receiving party creates or
which shall come into its custody or possession shall be and are the exclusive
property of the disclosing party to be used by the receiving party only for the
purposes expressly contemplated by this Agreement. All such records or copies
thereof and all tangible property of the disclosing party in the custody or
possession of the receiving party shall be delivered to the disclosing party
upon the request by the disclosing party. After such delivery, the receiving
party shall not retain any such records or copies thereof or any such tangible
property.

     3.   PRESERVATION OF CONFIDENTIALITY. The receiving party will use the same
degree of care in safeguarding the Proprietary Information as it uses for its
own confidential or like information and shall restrict disclosure of the
Proprietary Information to thos employees and agents authorized by the receiving
party to receive the same in furtherance of the purposeses of this Agreement.

     4.   GENERAL.
          --------

          a.   The invalidity or unenforceability of any provision of this
Agreement shall not affect the validity or enforceability of any other provision
of this Agreement.

          b.   No delay or ommission by eother party in exercising any right
under this Agreement will operate as a waiver of that or any other right. A
waiver or consent given by either party on any one occasion is effective only in
that instance and will not be construed as a bar to or waiver of any right on
any other occasion.

          c.   This Agreement is governed by and will be construed in accordance
with the laws of the State of Delaware.

          d.   Both parties acknowledge that breach of the foregoing obligations
may cause injury to the disclosing party and that the disclosing party may seek
and obtain injunctive or other equitable relief against such breach or
threatened breach without prejudice to any other remedies which may be available
to it.

          e.   Nothing in this Agreement shall be construed as establishing or
implying any partnership between the parties and nothing in this Agreement shall
be deemed to constitute either of the parties hereto as the agent of the other



                                      -2-
<PAGE>
 
party or to authorize either party to incur any expenses on behalf of the other
party or to commit the other party in any way whatsoever, without obtaining the
other party's prior written consent.

          f.   Nothing contained in the Agreement shall be construed as implying
any commitment or agreement by either party to make any investment in the other
party or in any business of the other party or to enter into any other business
arrangement of any nature whatsoever with the other party.

          g.   The obligations of confidentiality hereunder in respect of any
Proprietary Information shall terminate five (5) years from the date of the
disclosure of such Proprietary Information.

          BOTH PARTIES READ ALL OF THE PROVISIONS OF THIS AGREEMENT AND
UNDERSTAND AND AGREE TO EACH OF SUCH PROVISIONS.


                                     ERICSSON NETWORK SYSTEMS, INC.


     By:       /s/ Michael L. Margolis
              ---------------------------------------------------

     Name:     Michael L. Margolis
              ---------------------------------------------------   

     Title:    Vice President - Marketing
              ---------------------------------------------------

     Date:     June 15, 1993
             ---------------------------------------------------- 


                             OMNIPOINT CORPORATION


     By:       /s/ Evelyn Goldfine
              ---------------------------------------------------

     Name:     Evelyn Goldfine
              ---------------------------------------------------

     Title:    Director of Administration
              --------------------------------------------------- 

     Date:    June 16, 1993
              ---------------------------------------------------


                                      -3-
<PAGE>
 
                                  APPENDIX H 

                                 TO BE PROVIDED
 
<PAGE>
 
                                  APPENDIX I 

                                 TO BE PROVIDED

                                        
<PAGE>
 
                                  APPENDIX J 

                                   RESERVED


<PAGE>
                                                                       Exhibit 3

 
                                                                           FINAL
                                                                  EXECUTION COPY
                                                                  --------------



                        AGREEMENT FOR PURCHASE AND SALE
                                       OF
                      ERICSSON INC. MOBILE TERMINAL UNITS


                                    BETWEEN

                                 ERICSSON INC.

                                      AND

                         OMNIPOINT COMMUNICATIONS INC.

<PAGE>
 
                          *CONFIDENTIAL INFORMATION; 
                          HAS BEEN OMITTED AND FILED 
                        SEPARATELY WITH THE COMMISSION

                               TABLE OF CONTENTS
<TABLE> 
<CAPTION> 
<S>                                                                                   <C> 
RECITALS...........................................................................   1

AGREEMENT..........................................................................   1

1. DEFINITIONS.....................................................................   2

2. PRODUCTS; PURCHASE ORDERS AND SCOPE OF SUPPLY...................................   4
   2.1 SCOPE OF AGREEMENT; PRODUCTS................................................   4
   2.2 PRODUCTS....................................................................   4
   2.3 PERSONS AUTHORIZED TO PURCHASE; SUPPLY OF DELIVERABLES AND PURCHASE ORDERS..   5
   2.4 TECHNICAL INTERFACE.........................................................   6
   2.5 POINT-OF-SALE PACKAGING.....................................................   7
   2.6 PRODUCT TEST INSTRUMENTATION................................................   8
   2.7 ACCESSORIES.................................................................   8
   2.8 UPDATE TO CHANGED STANDARDS.................................................   8
   2.9 CO-BRANDED PRODUCTS.........................................................   9
   2.10 ALLOCATION OF PRODUCTION...................................................  10
   *                            ...................................................  11
   *                            ...................................................  11
   2.13 SOFTWARE LICENSE...........................................................  12
   2.14 DATABASE...................................................................  12
   2.15 COUNTRY OF ORIGIN..........................................................  12
                         ..........................................................  12
   2.17 ADVERTISING DISPLAY MATERIAL...............................................  12
   2.18 COMPATIBILITY WITH DISABLED OR HANDICAPPED END-USERS.......................  12
   2.19 CONTINUING PURCHASES.......................................................  13
   *                        .......................................................  13

3. CUSTOMER REPRESENTATIVE.........................................................  13
   3.1 CUSTOMER REPRESENTATIVE.....................................................  13
   3.2 CUSTOMER REPRESENTATIVE DUTIES..............................................  13
   3.3 UPDATE MEETINGS.............................................................  13
   3.4 BUYER'S PARTICIPATION IN PRODUCT DEVELOPMENT................................  14

4. QUALITY ASSURANCE...............................................................  14
   4.1 MARKET VERIFICATION TEST; COMMERCIAL TEST PROCEDURE.........................  14
   4.2 SAMPLE TESTING..............................................................  15
   4.3 ISO 9000 COMPLIANCE; AUDITS.................................................  15
   4.4 INCOMING INSPECTION.........................................................  15

5. PRICES.........................................................................   15
   5.1 PICE LIST                                 .................................   15
   *                         .....................................................   17
   5.3 RETURN POLICY..............................................................   19
   5.4 TAXES AND OTHER CHARGES....................................................   19
   5.5 PRICES INCLUDE.............................................................   19
   5.6 SELLER TO HOLD BUYER HARMLESS..............................................   19
   5.7 PRICES DETERMINED AT TIME OF SHIPMENT......................................   19
</TABLE> 

                                      -i-
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

<TABLE>
<CAPTION> 

<S>                                                                        <C>
6. INVOICING AND TERMS OF PAYMENT.........................................  19
 6.1 INVOICE UPON SHIPMENT................................................  19
 6.2 INVOICE DETAIL AND ELECTRONIC VERSION................................  19
 6.3 PAYMENT..............................................................  19
 6.4 PAST DUE PAYMENTS....................................................  19
 6.5 AMOUNTS IN DISPUTE...................................................  20
 *                     ...................................................  20

8. TRADEMARKS AND LOGOS ..................................................  20
  8.1 BUYER'S LOGO ON PRODUCTS; ADVANCE CONSENT OF BUYER FOR OTHER LOGOS..  20
  8.2 LIMITED USE OF MARKS................................................  20
  8.3 ARTWORK AND REPRODUCTION............................................  21

9. ORDERS ................................................................  21
  9.1 ORDER FORECAST; INITIAL ORDER.......................................  21
  9.2 ISSUANCE, ACKNOWLEDGMENT AND ACCEPTANCE OF PURCHASE ORDER...........  24
  9.3 ELECTRONIC DOCUMENT INTERCHANGE.....................................  25
  9.4 WAREHOUSING.........................................................  25
  9.5 INABILITY TO MEET REQUIRED SHIPPING DATE............................  25
  *                                           ............................  25
  9.7 DISCREPANCIES.......................................................  26
  9.8 DELIVERY............................................................  27
  9.9 MODIFICATIONS TO PURCHASE ORDER.....................................  27
  9.10 FURTHER DESCRIPTION................................................  28

10. TERM..................................................................  28
  10.1 TERM...............................................................  28
  10.2 EXTENDED TERM FOR CERTAIN PROVISIONS...............................  28

11. TITLE AND RISK OF LOSS................................................  28
    
12. PRODUCT SUPPORT.......................................................  28
  12.1 TRAINING SUPPORT...................................................  28
  12.2 TECHNICAL SUPPORT..................................................  29
  12.3 DOCUMENTATION......................................................  29
  12.4 SURVIVAL AND EXTENDED TERM.........................................  29

13. TERRITORY AND TRANS-SHIPMENT..........................................  30
  13.1 TERRITORY..........................................................  30
  13.2 NO TRANS-SHIPMENT..................................................  31

14. WARRANTY AND SERVICE REPAIR...........................................  31
  14.1 PRODUCT WARRANTY...................................................  31
  14.2 SOLE REMEDY; EXCESSIVE FAILURE.....................................  32
  14.3 LIMITATION.........................................................  32
  14.4 EXTENDED WARRANTY..................................................  32
  14.5 END-USER WARRANTY..................................................  33
  14.6 SERVICE REPAIR AND REPLACEMENT.....................................  33
  14.7 SURVIVAL AND TERM..................................................  33

15. TERMINATION; LIMITATION OF LIABILITY..................................  33
</TABLE> 
    

                                     -ii-


<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

<TABLE>
<CAPTION> 

<S>                                                                        <C>
  15.1 DEFAULT...........................................................   33
  15.2 FAILURE TO PURCHASE...............................................   33
  15.3 BANKRUPTCY........................................................   34
  15.4 LIMITATION OF LIABILITY...........................................   34
  15.5 RIGHTS OF PARTIES UPON TERMINATION BY SELLER......................   35

16. CONFIDENTIALITY......................................................   35
  16.1 CONFIDENTIAL INFORMATION DEFINED..................................   35
  16.2 EXCEPTIONS........................................................   36
  16.3 SURVIVAL..........................................................   36

17. FORCE MAJEURE........................................................   36
  17.1 FORCE MAJEURE.....................................................   36
  17.2 BUYER'S RIGHT TO TERMINATE FOR FORCE MAJEURE......................   37
  17.3 SELLER'S RIGHT TO TERMINATE FOR FORCE MAJEURE.....................   37

18. PRODUCT LIABILITY INDEMNIFICATION.....................................  37

19. INTELLECTUAL PROPERTY INDEMNIFICATION ...............................   38

20. DISPUTE RESOLUTION...................................................   38
  20.1 INTERNAL ESCALATION...............................................   38
  20.2 MEDIATION.........................................................   38
  20.3 ARBITRATION OF DISPUTES...........................................   39
  20.4 CONTINUE TO PERFORM...............................................   40

21. *                              ......................................   40

22. INSURANCE............................................................   40
  22.1 SELLER TO MAINTAIN................................................   40
  22.2 BUYER TO MAINTAIN.................................................   40
  22.3 LEVEL OF INSURANCE................................................   40
  22.4 CERTIFICATES OF INSURANCE.........................................   41
  22.5 NO WAIVER.........................................................   41

23. ASSIGNMENT...........................................................   41
  23.1 CONSENT REQUIRED..................................................   41
  23.2 INVALID WITHOUT COMPLIANCE........................................   41
  23.3 ASSIGNS...........................................................   41

24. NOTICES..............................................................   42
    
25. PUBLICITY............................................................   42
    
26. COMPLIANCE WITH LAWS; GOVERNING LAW..................................   43
    
27. WAIVERS OF DEFAULT...................................................   43
    
28. AMENDMENTS...........................................................   43
    
29. ORDER OF PRECEDENCE..................................................   43

</TABLE> 
    
                                     -iii-


<PAGE>

<TABLE> 
<CAPTION> 

<S>                                                                         <C> 
 
30. HEADINGS.............................................................   44
    
31. SEVERABILITY.........................................................   44
    
32. SURVIVAL.............................................................   44
    
33. LICENSE..............................................................   44
    
34. PARTY RELATIONSHIP...................................................   44
    
35. COUNTERPARTS.........................................................   44
    
36. ATTACHMENTS AND INCORPORATION........................................   45
  36.1 INCORPORATION.....................................................   45
  36.2 ORDER OF PRIORITY.................................................   45

37. ENTIRE AGREEMENT.....................................................   45
</TABLE> 


                                     -iv-

<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

 
LIST OF CONTRACT ATTACHMENTS

ATTACHMENT                      DESCRIPTION
Attachment A-1                  Description of CH337/CF337 (specifications)
Attachment A-2                  Description of CH388/CF388 (specifications)
Attachment A-3                  Description of CA318 EFR (specifications)
Attachment B                    Forecasting and Ordering Processes (on an "if
                                required basis")
Attachment C                    Dates for Completion of Attachments
Attachment D                    Prices
Attachment E                    Sample Testing Protocol
Attachment F                    (Reserved)
Attachment G                    *
Attachment H                    End-user warranty
Attachment I                    Database Format
Attachment J                    Advertising Display Material
Attachment K                    Return Policy

                                      -v-


<PAGE>
 
                                                                  EXECUTION COPY
                                                                 
                        Agreement for Purchase and Sale

                                       of

                      Ericsson Inc. Mobile Terminal Units

This Agreement for Purchase and Sale of Ericsson Inc. Mobile Terminal Units (the
"Agreement"), is made and effective as of the ____ day of April, 1996, by and
between Omnipoint Communications Inc., a Delaware corporation, with its
principal place of business in Arlington, Virginia ("Buyer") and Ericsson Inc.,
a Delaware corporation, with its principal place of business in Richardson,
Texas ("Seller").

                                   RECITALS
                                
A.     Buyer has received authority from the FCC (as defined hereinbelow) to
       construct and operate PCS (as defined hereinbelow) networks in certain
       areas within the jurisdiction of the United States and may receive
       authority to operate additional such systems.

B.     Seller, or an affiliate of Seller, and Buyer, contemporaneously herewith,
       are entering into the Infrastructure Agreement (as defined hereinbelow)
       whereby Buyer's Affiliate (as defined hereinbelow) agrees to purchase
       certain network infrastructure goods and services for certain of such PCS
       Systems from Seller or Seller's affiliate.

C.     Seller has offered to sell to Buyer the wireless communications
       subscriber devices and accessories described herein at the prices and
       discounts specified herein.

D.     Buyer's entry into the Infrastructure Agreement is conditioned upon
       Seller's commitment to supply the wireless communications subscriber
       devices and accessories upon the terms and price defined in this
       Agreement.

E.     Seller wishes to sell and Buyer wishes to buy certain wireless
       communications subscriber devices and accessories under the terms and
       conditions set forth in this Agreement and the associated Attachments
       that are incorporated herein.

                                   AGREEMENT
                               
     Now, Therefore, in consideration of the premises and mutual covenants set
     forth herein and for other good and valuable consideration, the sufficiency
     of which is hereby acknowledged, the parties, intending to be legally
     bound, agree as follows:



                                      -1-

<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

1    DEFINITIONS
     -----------

Capitalized terms used within this Agreement or within an Attachment to this
     Agreement are defined in this Section in alphabetical order or in an
     Attachment.

AFFILIATE means any partnership, corporation or other entity in which Buyer owns
     a twenty percent (20%) or greater equity interest or any entity
     controlling, controlled by or under common control with Buyer after
     applying the attribution rules of Section 318 of the Internal Revenue Code
     of 1986, as amended (the "Code"), which operates or is authorized to
     operate a Cellular System or PCS system in North America including the
     Caribbean Islands.

ANNUAL FORECAST means that annual forecast of purchase volume, updated
     quarterly, supplied by Buyer to Seller, as more specifically described in
     Section 9.1.

 *

BTA means Basic Trading Area, a geographic area designated by the Federal
     Communications Commission for the purpose of granting authorizations to
     construct and operate PCS networks.

BUYER means Omnipoint Communications, Inc.
- -----                                     

COMMERCIAL SERVICE means "Commercial Service" as that term is defined in the
- ------------------                                                          
     Infrastructure Agreement.

CONFIDENTIAL INFORMATION means information that the parties are obligated to
     protect as more fully provided in Section 16.

END-USER means the customer of a Permitted Purchaser (i.e., the person that buys
- --------                                                                        
     and uses a Product).

FCC OR FEDERAL COMMUNICATIONS COMMISSION means the agency of the United States
     Government charged with authorizing PCS networks, currently the Federal
     Communications Commission, or its successor agency.

GUARANTEED ORDER PERIOD means that *                             of time
- -----------------------                                                 
     commencing on the date hereof and terminating on the *
     of the date hereof.

HANDSET(S) means a mobile station in the PCS service intended to be used while
     in motion or during halts at unspecified points and conforming to the PCS
     1900 specifications, as appropriate. Handsets include handheld portable
     units and units installed in vehicles.

                                      -2-
<PAGE>
 
INFRASTRUCTURE AGREEMENT means that certain contract, captioned "Acquisition
     Agreement for Ericsson CMS 40 Personal Communications System (PCS)
     Infrastructure Equipment," entered into contemporaneously herewith between
     Buyer and Seller (or Seller's affiliate) covering the purchase and sale of
     network infrastructure equipment and related services.

INTELLECTUAL PROPERTY CLAIM (IP CLAIM) means a claim involving Seller's
     intellectual property rights, as more fully described in Section 19.1

INVENTORY means all Products owned and held by Buyer for resale or use.

IS-661 means the TIA/ATIS Interim Standard or proposed Interim Standard
     TIA/ATIS/IS-661, first proposed to the Joint Technical Committee on
     Wireless Access on November 1, 1993.

MTA means Major Trading Area, a geographic area designated by the Federal
     Communications Commission for the purpose of granting authorizations to
     construct and operate PCS networks. Where the authorization is granted for
     a BTA, references to MTAs shall include BTAs.

ORDER LEAD TIME means the time between the date of a Purchase Order and the
     Requested Shipping Date of the Product.

PERMITTED PURCHASER means those persons identified or described in Section
     2.3.1.

PERSONAL COMMUNICATIONS SERVICE ("PCS") means a system authorized by the FCC to
     provide public correspondence using cellular radio techniques and operating
     in the frequency band 1850 MHz to 1910 MHz and 1930 MHz to 1990 MHz.

PRODUCTS means the wireless communication devices and accessories supplied by
     Seller to Buyer in accordance with this Agreement, including, without
     limitation, Handsets, Accessories and related documentation as the same may
     be modified, added or discontinued during the term of this Agreement (where
     the addition, modification or discontinuance is in accordance with this
     Agreement) and available for purchase by Buyer or otherwise supplied to
     Buyer under this Agreement.

PURCHASE ORDER means Buyer's order to Seller for specific Products, as more
     fully described in Section 2.

REQUESTED SHIPPING DATE means the date, as shown in a Purchase Order or
     otherwise, upon which Buyer requests shipping of certain Products, as more
     fully described in Section 9.

REQUIRED SHIPPING DATE means that date upon which Seller has agreed to ship
     Products, as more fully described in Section 9.

                                      -3-
<PAGE>
 
SECTION means, when used without any other reference, sections, including
     subsections, within this Agreement.

SOFTWARE means (a) all computer software furnished hereunder for use with
     Products including, but not limited to, computer programs contained on a
     magnetic or optical storage medium, in a semiconductor device, or in
     another memory device or system memory consisting of (i) hardwired logic
     instructions which manipulate data in central processors, control input-
     output operations, and error diagnostic and recovery routines, (ii)
     instruction sequences in machine-readable code that control call
     processing, peripheral equipment and administration and maintenance
     functions; and (b) documentation furnished hereunder for use and
     maintenance of the Software.

SPARE PARTS means those replacement parts needed to maintain Products in working
     order.

SUBSCRIBER IDENTITY MODULE (SIM) means mean an electronic module, either in the
     form of an integrated circuit "smart card" or otherwise, that contains
     personalization information concerning a user and is intended to be
     inserted in and removed from a SIM reader in Handset Products.

TERRITORY means all MTAs or BTAs in which Buyer operates PCS businesses.

2    PRODUCTS; PURCHASE ORDERS AND SCOPE OF SUPPLY
     ---------------------------------------------

     2.1  SCOPE OF AGREEMENT; PRODUCTS The terms and principles established in
          this Agreement cover the supply by Seller of Products, as well as
          ancillary services and Software, and other information and services as
          required under this Agreement.  Except as limited by Section 13,
          Products may be sold or leased by Buyer to its customers or its
          dealers or agents or to other parties. In addition, Products may be
          used for Buyer's administrative, marketing and operational purposes.
          Attachment A-1 through Attachment A-3 set forth and establish the
          specifications for specific Products and Attachment D describes the
          price for specific Products.  Neither Buyer, nor any Affiliate, nor
          any Authorized Purchaser has any obligation hereunder to buy any
          Product from Seller, except upon the issuance of a purchase order.  At
          any time during the term set forth in Section 10, Buyer may, at its
          option, direct Seller to supply any part of the Products pursuant to
          one or more purchase orders issued by Buyer in accordance with this
          Agreement (such individual or multiple purchase orders being referred
          to as a "Purchase Order").

     2.2  PRODUCTS.  Seller shall sell and deliver the Products described and
          set forth in Attachment A-1 through Attachment A-3, or as otherwise
          provided in this Agreement, upon the terms and conditions established
          in this Agreement, to Buyer in such quantities as may be requested by
          Buyer pursuant to this Agreement and in the manner set forth herein.
          Seller agrees to update the Products 

                                      -4-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

          available to Buyer under this Agreement, as new versions of existing
          Products and new Product models become available from Seller upon the
          terms and conditions set forth herein, including those set forth in
          Section 5.

     2.3  PERSONS AUTHORIZED TO PURCHASE; SUPPLY OF DELIVERABLES AND PURCHASE
          ORDERS.

          2.3.1  PERSONS PERMITTED TO BUY PRODUCTS. This Agreement contemplates
               purchases by Buyer and certain other persons, as defined below.
               The entities defined in Sections 2.3.1.1 through 2.3.1.3 are
               collectively referred to as "Permitted Purchasers."

            2.3.1.1  BUYER.  Buyer is permitted to purchase under the terms and
                    conditions applicable to Buyer.

            2.3.1.2  AFFILIATES.  Affiliates are permitted to purchase under the
                    terms and conditions in this Agreement applicable to Buyer,
                    except that each Affiliate is severally liable, and Buyer is
                    not responsible for payments owed by an Affiliate to Seller.

            2.3.1.3 *     

                                      -5-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

          2.3.2  RESPONSIBILITY FOR PAYMENT. Buyer has no responsibility for
               payments of obligations incurred by any purchaser except for
               itself.  Seller shall not seek payment from Buyer for any sums
               owed by any purchaser except Buyer.

          2.3.3  CREDITWORTHINESS.  For any Permitted Purchaser other than
               Buyer, Seller may establish commercially reasonable, non-
               discriminatory credit (and other) qualifications as a pre-
               condition to sales.

          2.3.4  NO THIRD PARTY BENEFICIARY.  Affiliates and Authorized
               Purchasers shall be entitled to the benefit of this Agreement
               only to the extent so indicated, shall not be deemed to be third-
               party beneficiaries of this Agreement and, except when
               specifically permitted to make purchases hereunder, shall not
               have the right to enforce this Agreement against Buyer or Seller.

          2.3.5  EXCLUSIVE PURCHASES.  Nothing in this Agreement shall require
               Buyer, or any other Permitted Purchasers, to purchase exclusively
               from Seller.

          2.3.6  ORDERS BY AUTHORIZED PURCHASERS. Authorized Purchasers shall
               place orders for Products using a commercially reasonable
               mechanism established by Seller, including order confirmation, as
               may be established by Seller.

          2.3.7  NON-INTERFERENCE. Seller agrees that it shall not intentionally
               interfere in the relationship between Buyer and Buyer's
               Affiliates, dealers and agents.

          2.3.8  PARALLEL CONTRACT BY AFFILIATES. To simplify administration of
               purchases by Affiliates, unless otherwise agreed by Buyer, Seller
               and the respective Affiliate, each Affiliate shall enter into a
               separate contract with Seller consistent with Seller's
               obligations to provide to such Affiliate(s) the same terms and
               conditions provided to Buyer herein.

          2.3.9  MINIMUM ORDER. Orders under this Agreement shall be for a
               minimum quantity of two hundred (200) units of the Product
               ordered for delivery to a single location.

          2.3.10  LOCUS OF SALES. Sales to Buyer, Affiliates or Authorized
               Purchasers shall be intended for resale or use within the
               Territory.

     2.4  TECHNICAL INTERFACE. *

                                      -6-
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     2.5  POINT-OF-SALE PACKAGING.

          Seller shall use Universal Product Code ("UPC") stock control
          numbering ("SKU") markings or other customer-specific bar code
          markings on the outside of the point-of-sale package for each of the
          packaging options described below. Seller shall provide information to
          Buyer concerning Seller's bar coding and serial number coding for
          Products, sufficient to permit Buyer to properly electronically read
          Seller's bar coding and to be able to monitor and track Products
          received. Invoices and shipping notices shall include electronic
          copies of serial numbers and other information reasonably needed by
          Buyer to track and control inventory.

          Buyer shall select, from time-to-time, its desired packaging format
          from among the options described below, subject to the limitations
          established therein. In the event that Buyer wishes to change its
          desired packaging format, Buyer and Seller shall meet to discuss the
          lead time necessary to effect such change. Seller may establish
          commercially reasonable minimum order quantities for each type of
          packaging.

          2.5.1  SELLER-LABELED BOX.  The Product is shipped in Seller's
                 standard size rectangular box labeled with Seller's trade name.

          2.5.2  GENERIC BOX. The Product is shipped in Seller's standard size
                 rectangular box without any labels, in a plain white cardboard
                 format.  In the event that any labels, packaging or identifying
                 marks are attached to, 

                                      -7-
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                        *CONFIDENTIAL INFORMATION;
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                 or wrapped around such box, the label, packaging or identifying
                 marks shall include the "Ericsson Inc." logo.

          2.5.2  GENERIC BOX. The Product is shipped in Seller's standard size
                 rectangular box without any labels, in a plain white cardboard
                 format. In the event that any labels, packaging or identifying
                 marks are attached to, or wrapped around such box, the label,
                 packaging or identifying marks shall include the "Ericsson
                 Inc." logo.

          2.5.3  BULK-SHIP. The Product is shipped in a bulk package, without
                 individual packages for each unit of Product. Under this
                 option, Buyer has the obligation to arrange for individual unit
                 packaging. In the event that any labels, packaging or
                 identifying marks are attached to, or wrapped around any
                 individual unit packaging, the label, packaging or identifying
                 marks shall include the "Ericsson Inc." logo.

          2.5.4  CUSTOM PACKAGE. The Product is shipped in Seller's standard
                 size rectangular box with Buyer's artwork and inserts
                 ("Commercial Product" packaging). Buyer shall provide the
                 necessary artwork in such format and upon such schedules as may
                 be reasonably agreed by the parties. *


                 Seller shall ensure that the proper materials and information
                 are inserted in the corresponding Commercial Product packaging
                 and are delivered to the corresponding geographical regions.
                 Seller may impose a commercially reasonable charge to recover
                 its increased cost in providing custom packaging.

     2.6  PRODUCT TEST INSTRUMENTATION. At no cost to Buyer, beginning on or
          before July 1, 1996, Seller shall provide Buyer the quantity of
          Seller's "download box" specified below and provide on-site training
          in the proper use of such equipment. Seller shall provide Buyer 
          with *
                                 under this Agreement, but in no event shall *
           
                    Additional quantities of download boxes shall be available
          for purchase at the price set forth in Attachment D. Once *
                                                                  Buyer and
          Seller shall review the ratio of Handsets to download boxes and make
          an appropriate adjustment based upon the experience of the parties.

     2.7  ACCESSORIES. Seller will include a standard set of accessories with
          each Handset as identified and set forth in Attachment A-1 through
          Attachment A-3. In addition, Seller will offer a set of optional
          accessories available at additional cost as identified in Attachment
          D.

     2.8  UPDATE TO CHANGED STANDARDS. *

                                      -8-
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                                       *

          2.8.3  In no event shall Seller be required to install such updates,
                 or reimburse any Permitted Purchaser or any End-User for any
                 costs of installing the updated Software pursuant to this
                 Section.

          2.8.4  Notwithstanding anything to the contrary contained herein,
                 Seller shall comply with the final order of any court or
                 administrative body with respect to any required modification
                 of any Product.

     2.9  CO-BRANDED PRODUCTS.

          2.9.1  CO-BRANDED PRODUCTS. Buyer may wish to receive all or part of
                 its orders in the form of co-branded Products, whereby Buyer's
                 name appears on the Product in addition to Seller's name (such
                 Products being referred to as "Co-Branded Products"). Such Co-
                 Branded Products may be in slightly different form, different
                 color, etc. as may be mutually agreed by Buyer and Seller. Co-
                 Branded Products shall be available to Permitted Purchasers to
                 the extent determined by Buyer. Seller's logo shall also appear
                 on Co-Branded Products.

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        2.9.2  PRICES FOR CO-BRANDED PRODUCTS. The parties shall negotiate any
               price change for Co-Branded Products consistently with this
               Section 2.9.2. Where the change necessary for a Co-Branded
               Product requires the addition of Buyer's artwork to the Product,
               where Buyer provides any necessary camera-ready artwork and where
               more than an aggregate of twenty-five thousand (25,000) units of
               the particular Co-Branded configuration is to be purchased by
               Buyer or Authorized Purchasers, no additional charges shall be
               made for the changed labeling. In other instances, the additional
               charge for a Co-Branded Product shall be based upon *


                         Notwithstanding anything to the contrary contained in
               the preceding sentences, *


                         Seller's charges for packaging of a Co-Branded Product
               are to be determined in the manner set forth in Section 2.6.

   2.9.3  TYPE APPROVAL. Where FCC or other regulatory agencies require Type
          Approval or other regulatory approval for a Co-Branded Product, Seller
          shall cooperate with Buyer in seeking and obtaining such approval.
          Seller's cooperation shall include, if so requested by Buyer, copies
          of data from other filings or testing of Products and submission of
          requests for approval as Buyer's agent. Seller's charge for services
          under this Section 2.9.3 *


    2.10  ALLOCATION OF PRODUCTION. In the event that Seller is unable to meet
          its orders for Products, Seller shall use a fair, non-discriminatory
          method of allocating production among its customers. Seller's
          allocation of production shall not relieve Seller from liability for
          damages as may be provided elsewhere in this Agreement. In the event
          that Seller believes that it is, or that it will reasonably be, unable
          to meet Buyer's forecast orders, Seller shall promptly inform Buyer of
          the method of allocation that it employs, the percentage of supply
          allocated to Buyer and Affiliates, the number of Products that Buyer
          and Affiliates shall receive under Seller's allocation methodology and
          when Seller expects that such allocation shall cease. Seller shall
          maintain this information up-to-date and promptly inform Buyer of
          changes.

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     2.11 *

     2.13 SOFTWARE LICENSE.  Subject to the limitations set forth elsewhere in
          this Agreement, *                               Seller hereby grants
          to Buyer a nonexclusive license to use Software associated with
          Products delivered to Buyer.

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     2.14 DATABASE.  Seller shall provide electronic format data concerning
          each Handset Product shipped, in the format set forth in Attachment I.
          The form of data and its media may be changed from time-to-time by
          mutual agreement of the parties.

     2.15 COUNTRY OF ORIGIN.  Upon request by Buyer, Seller shall provide Buyer
          with evidence of country of origin of Products, including the usual
          and customary certificates of country of origin, signed by an
          appropriate authorized official of Seller.
          * 


     2.17 ADVERTISING DISPLAY MATERIAL. Seller shall create the normal and
          customary point-of-sale display material, product brochures, dummy
          mobile telephones, etc. and furnish reasonable quantities of the same
          to Permitted Purchasers at the prices set forth in Attachment D.
          Seller shall cooperate with Buyer in producing this material and, upon
          request by Buyer, add reasonable Buyer-defined information to the
          point-of-sale material.  Reasonable quantities of the sales material
          described in Attachment J will be provided by Seller to Buyer without
          charge.  Such quantities shall be consistent with those quantities
          offered to other customers of Seller under similar circumstances.

     2.18 COMPATIBILITY WITH DISABLED OR HANDICAPPED END-USERS. Seller warrants
          that, upon delivery, Products will comply with all FCC rules or other
          regulations concerning compatibility with disabled or handicapped End-
          Users, including hearing impaired End-Users using hearing aids, blind
          End-Users, etc., applicable as of the date of such delivery.  Seller
          also warrants that, to the extent applicable to Seller or Buyer,
          Seller's Products comply with the requirements of the Americans With
          Disabilities Act, 42 U.S.C. (S)12101. Seller shall add to its
          instruction manuals information concerning use of Products by disabled
          or handicapped persons.  Further, Seller agrees to use commercially
          reasonable efforts to make modifications to the Products to
          accommodate disabled or handicapped End-Users.

 
                                     -12-

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     *
     2.20 COMPETITIVE FEATURES DEVELOPMENT.  Seller acknowledges that it is of
          significant interest to Buyer that Buyer be able to offer End-Users
          data and fax capabilities in conjunction with Handsets.  Accordingly,
          Seller agrees that it will continue to explore the possibilities of
          adding and improving upon fax and data capabilities, and other
          features, as, in its discretion, Seller deems commercially fit.

3    CUSTOMER REPRESENTATIVE
     -----------------------

     3.1  CUSTOMER REPRESENTATIVE.  Seller shall identify a customer
          representative (the "Customer Representative") with overall
          responsibilities as described below. Seller shall delegate to the
          Customer Representative such authority within Seller's organization as
          is necessary for proper discharge of the duties and obligations set
          forth in this Agreement.

     3.2  CUSTOMER REPRESENTATIVE DUTIES. The Customer Representative shall
          provide timely information to Buyer concerning shipping and delivery
          schedules, manufacturing of co-branded or other custom Products,
          specifications, features and functions, inter-operability, and other
          related matters. The Customer Representative shall be Buyer's primary
          point of contact for all issues arising from the implementation and
          execution of the terms and conditions of this Agreement.

     3.3  UPDATE MEETINGS. The parties shall meet not less than once every
          calendar quarter to review Buyer's needs for Products, and discuss new
          Products (such meeting being referred to as an "Update Meeting").  At
          least thirty (30) days prior to each Update Meeting, Buyer shall
          submit to Seller a written, proposed agenda, outlining the development
          issues Buyer would like addressed by Seller.  Seller shall review such
          proposed agenda and will provide an update to Buyer on any such issue
          where Seller has provided, or is willing to provide, an update to any
          customer or other third party.  Further, at each Updated Meeting,
          Seller will provide to Buyer an update on the status of the
          development of any features Seller anticipates will be launched within
          the forthcoming two (2) years, provided that Seller has disclosed, or
          is willing to disclose, such information to any customer or other
          third party.



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    3.4  BUYER'S PARTICIPATION IN PRODUCT DEVELOPMENT.

         3.4.1 From time to time Seller may request that Buyer participate in
               Seller's design process for Products, including but not limited
               to the following activities:

                                       *



         3.4.2 To the extent that Seller so requests Buyer's participation in
               any of the above, or any other development activity, including,
               but not limited to, Beta testing, Buyer shall consider Seller's
               request on a reasonably timely basis and, to the extent Buyer
               participates in such development activity, Buyer agrees to do so
               in good faith.

4    QUALITY ASSURANCE
     -----------------

     4.1  MARKET VERIFICATION TEST; COMMERCIAL TEST PROCEDURES.For each new
          model of Product, *
                                                            Seller will provide

          Buyer, *                                        prototypes for market
          testing.  Buyer shall test the units according to any protocols
          submitted by Seller and may additionally test the units as Buyer deems
          appropriate.  In addition, for each new model of Product, *

                                 Seller will provide Buyer, *

            units for Beta testing in accordance with Seller's protocols.  Buyer
          shall conduct all such testing in good faith and shall submit the
          results to Seller *

                    In addition, if Seller so requests, all test   units,
          including all Beta units, shall be returned to Seller upon completion
          of the tests.

     4.2


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     4.3  ISO 9000 COMPLIANCE; AUDITS. Seller shall produce Products in
          accordance with a quality system meeting the requirements established
          in ISO Standard 9001. Seller shall maintain ISO 9001 certification and
          shall, upon request by Buyer, furnish Buyer a copy of Seller's ISO
          certification. Buyer may conduct quality audits of Seller's
          manufacturing facilities up to four times a year, with advance notice
          of five (5) working days.

     4.4  INCOMING INSPECTION. In addition to the sample testing described in
          Section 4.2, Buyer shall have the right to conduct up to one hundred
          percent (100%) inspection of all incoming products ("Incoming
          Inspection"). Any Incoming Inspection shall be completed within thirty
          (30) days of receipt of the Product undergoing inspection. The
          Incoming Inspection shall determine completeness of shipment, physical
          and electrical condition of Products, and otherwise verify conformance
          of the Products with the specifications thereof. Buyer shall have the
          right to reject any Product failing Incoming Inspection.  Buyer,
          however, shall not have the right to delay payment, where payment to
          Seller is otherwise due, by virtue of Buyer's failure to complete
          Incoming Inspection *

          Buyer's performance of Incoming Inspection, however, shall not prevent
          Buyer from making claims under other provisions of this Agreement for
          defective, mis-delivered or otherwise incorrect Products.

5    PRICES
     ------

     5.1  PRICE LIST; CHANGES AS NEW PRODUCTS ARE INTRODUCED. The prices for the
          Products as set forth in Attachment D are firm and shall be adjusted
          only as provided in this Agreement.  Notwithstanding anything to the
          contrary contained in the previous sentence or contained elsewhere in
          this Agreement, Seller acknowledges and agrees that, with respect to
          that certain Purchase Order (as defined hereinbelow) placed by Buyer
          on or about March 7, 1996 for one hundred thousand (100,000) Handsets,
          the price(s) to be charged to Buyer upon delivery of such Handsets
          shall be equal to or less than the base price of Handsets identified
          for the third and fourth quarters of 1996 as set forth in Attachment
          D.  If, at any time during the term of this Agreement, Seller
          implements changes in the Products, modifies the drawings and
          specifications relating thereto, or substitutes therefor products of
          more recent design through proposed amendments to this Agreement, in
          addition to any other requirements provided in this Agreement, any
          changes, modifications or substitutions must comply with each of the
          following requirements with respect to changes to existing Products or
          new Products intended as replacements for existing Products:


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        5.1.1  INTERCHANGEABILITY. Where the new or changed Product is
               intended to be physically interchangeable with an existing
               Product, such new or changed Product must not adversely affect
               physical or functional interchangeability with existing Products
               or performance, unless otherwise agreed in writing by Buyer.

        5.1.2  PRICE. The price for equivalent Product (i.e., with similar
               form (including size and weight), features, functionality and
               accessories)  must be at or below the price provided in this
               Agreement, unless otherwise agreed in writing by Buyer.

        *

        5.1.3  ACCESSORY COMPATIBILITY. Where a new Product is introduced,
               Seller shall ensure that, to the greatest extent reasonably
               feasible, the new Product is plug-compatible with older Products
               for accessories. It is not Buyer's intention to limit Seller's
               ability to introduce smaller or lighter Products through this
               Section 5.1.3.  However, Seller shall give due consideration to
               ensuring compatibility of, among other things, battery chargers,
               hands-free kits, etc., when introducing new Products.

        5.1.4  NO REDUCTION IN SELLER'S OBLIGATIONS. The introduction by
               Seller of a new Product in substitution of a Product set forth in
               Attachment A will not in any way reduce or in any way diminish
               Seller's obligations under the warranties provided in this
               Agreement nor will it reduce or diminish in any way the scope of
               warranties and representations provided to Buyer under this
               Agreement.

        5.1.5  ADVANCE NOTICE.

               5.1.5.1  Seller will provide Buyer with advance written notice of
               any substantial change, modification or substitution, including
               notice of Seller's intention to change the Product's price.


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                         However, notice is not necessary where Seller
               reasonably considers the change as minor, where there is no price
               change and where there has been compliance with the provisions of
               Sections 5.1.1 through 5.1.4. *

               5.1.5.2  Notwithstanding anything to the contrary contained in
               Section 5.1.5.1, Seller shall give Buyer



        5.1.6  AMENDMENTS. Where each of the requirements established in
               Sections 5.1.1 through this Section 5.1.6 has been met to Buyer's
               reasonable satisfaction, Buyer and Seller shall agree upon an
               amendment to this Agreement reflecting the agreement of the
               parties, such amendment to be accomplished as required in Section
               28. *

 



        New Products that are not substitutes or replacements for existing
        Products need not comply with Section 5.1.

     5.2 *


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                                       *

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     5.3  RETURN POLICY.  Buyer shall have the right to return Product, subject
          to re-stocking charges and other limitations set forth in Seller's
          "Standard Return Policy," as amended from time to time, a copy of the
          current version being attached hereto as Attachment K.

     5.4  TAXES AND OTHER CHARGES. Seller shall calculate its prices as provided
          below.

     5.5  PRICES INCLUDE. Seller's prices are exclusive of charges for freight
          and insurance for delivery to the Buyer's designated destination.
          Seller shall bear the cost of all taxes, import and export duties, and
          other governmental fees of whatever nature except sales and use taxes,
          which shall be added to the net invoice prices as applicable and
          stated as separate items on the invoice applicable to each Purchase
          Order.

     5.6  SELLER TO HOLD BUYER HARMLESS. Seller agrees to pay, and to hold Buyer
          harmless from and against, any penalty, interest, tax or other charge
          that may be levied or assessed as a result of the delay or failure of
          Seller for any reason to pay any tax or file any return or information
          required by law, rule or regulation or by this Agreement to be paid or
          filed by Seller.

     5.7  PRICES DETERMINED AT TIME OF SHIPMENT. The price invoiced Buyer shall
          be the price determined in accordance with this Agreement, as of the
          date of shipment of the Product.

6    INVOICING AND TERMS OF PAYMENT
     ------------------------------

     6.1  INVOICE UPON SHIPMENT. Seller shall issue an invoice to Buyer for
          Products at the time of shipment.

     6.2  INVOICE DETAIL AND ELECTRONIC VERSION. Seller shall submit invoices to
          Buyer in detail satisfactory to Buyer. Upon request by Buyer and when
          implemented by Seller, Seller shall provide invoices in an electronic
          format mutually agreed that meets Buyer's reasonable needs.

     6.3  PAYMENT. Buyer guarantees to Seller to pay invoices within thirty (30)
          calendar days of Buyer's receipt of an invoice.

     6.4  PAST DUE PAYMENTS. Any payment not made within thirty (30) days of
          receipt of invoice shall be subject to a late payment charge applied
          against the unpaid portion of the charge. The late payment charge
          shall be applied daily after the due date until payment is received.
          The daily late payment charge shall be calculated

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          by multiplying the outstanding balance for the day by that certain
          quotient, the numerator of which is *



     6.5  AMOUNTS IN DISPUTE. Where Buyer disputes the amount due under an
          invoice, Buyer shall pay the sum not in dispute. Sums disputed in good
          faith shall not be considered late under Section 6.4. Where the sum in
          dispute, or the cumulative sum in all outstanding disputes, exceeds
          two million dollars ($2,000,000), Seller may require Buyer to deposit
          the amounts in dispute into an escrow account. In this event, the
          interest earned in the escrow account and the fees in establishing and
          maintaining the escrow account shall be divided by the parties in
          proportion to the resolution of the disputed sum. The escrow shall be
          treated for federal income tax purposes as a grantor trust by Buyer.
          In the event Seller requires the escrowing of such amounts, the
          interest earned in the escrow account and the fees in establishing and
          maintaining the escrow account shall be divided by the parties in
          proportion to the resolution of the disputed sum, provided, however,
          that Buyer/Seller shall receive, on an annual basis, a distribution
          from the escrow equal to the product of the accrued interest income
          and Buyer's/Seller's marginal combined federal and state income tax
          rate. *





8    TRADEMARKS AND LOGOS
     --------------------

     8.1  BUYER'S LOGO ON PRODUCTS; ADVANCE CONSENT OF BUYER FOR OTHER LOGOS'.
          At Buyer's request, the individual Products shipped under this
          Agreement shall carry Buyer's designated logo and/or labeling as
          described in Section 2.9

     8.2  LIMITED USE OF MARKS. To ensure protection of each party's trademarks,
          trade names, corporate slogans, corporate logo, goodwill and product
          designations,


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          Seller, without the express written consent of Buyer, and Buyer,
          without the express written consent of Seller, shall have no right to
          use any such marks, names, slogans or designations of Buyer or Seller,
          as the case may be, in the sales, lease or advertising of any Products
          or on any Product container, component part, business forms, sales,
          advertising and promotional materials or other business supplies or
          material, whether in writing, orally or otherwise.

     8.3  ARTWORK AND REPRODUCTION. To the extent requested by Buyer and in
          accordance with Sections 2.9 and 8.1, Buyer shall provide Seller with
          camera-ready artwork of Buyer's trademarked logo labels.  Buyer hereby
          authorizes Seller to reproduce such trademarked labels to Buyer's
          satisfaction for the sole purpose of affixing such trademarked labels
          to the Products and point-of-sale packaging in accordance with Buyer's
          specifications. Buyer represents and warrants to Seller that it has
          the right, by way of ownership or otherwise, to use such logo and
          further agrees to indemnify and hold Seller harmless for any losses,
          damages or other liabilities resulting from the use of Buyer
          designated logo. The parties will agree upon reasonable provisions for
          samples and approval of trademarked labels added to Products.

9    ORDERS
     ------

     9.1  ORDER FORECAST; INITIAL ORDER. This Section defines the mechanism by
          which Buyer provides periodic forecasts of its demand and delivery
          requirements with a corresponding delivery time from Seller and
          provides a mechanism for certain firm orders to be placed with
          guaranteed delivery.

          9.1.1     FORECAST OF DEMAND. Once each month, Buyer shall furnish
                    Seller with a rolling forecast, showing Buyer's projected
                    purchases month-by-month during the forthcoming twelve (12)
                    months. The initial forecast shall be provided no later than
                    sixty (60) days from the date hereof. Buyer and Seller shall
                    agree upon the level of detail to be provided in the
                    forecast and the mechanism and location of delivery.

          9.1.2 *


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               9.1.2.1   ORDER SO IDENTIFIED. Buyer must indicate in writing on
                         the face of such order, by transmittal letter, or in
                         some other form of written direction, that the Purchase
                         Order be given Guaranteed Order status. With respect to
                         the placement of the initial Guaranteed Order, the
                         parties hereby acknowledge and agree that the Purchase
                         Order submitted by Buyer to Seller on or about

      
                         that Buyer and Seller shall mutually agree to the
                         shipment dates for such Guaranteed Order



               9.1.2.2   MINIMUM QUANTITIES. The Purchase Order must meet the
                         minimum delivery location and quantities defined
                         elsewhere in this Agreement for the Product
                         configuration ordered.

               9.1.2.3   *


               9.1.2.4   MULTIPLE DELIVERIES. The Purchase Order may call for
                         multiple deliveries over a defined interval, where each
                         delivery complies with this Section 9.1.2.

               9.1.2.5   *



               9.1.2.6   *



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               *





               9.1.2.7   CHANGE OF MODEL MIX. Buyer may change the model mix of
                         any shipment of any Guaranteed Order and Seller shall
                         honor such changes subject to the following:

                         9.1.2.7.1 All such changes must be made in writing.

                         9.1.2.7.2 For changes requested where Products are
                                 sought to be substituted for other Products
                                 within that same model family (i.e., flip v.
                                 non-flip versions of otherwise identical
                                 items), requests for changes made at least
                                 ninety (90) days prior to the Required Shipping
                                 Date shall be honored, without adjustment to
                                 the Required Shipping Date.

                         9.1.2.7.3 For changes requested where (a) Products are
                                 sought to be substituted for other Products
                                 within that same model family, but the request
                                 is made less than ninety (90) prior to the
                                 Required Shipping Date or (b) Products are
                                 sought to be substituted for other Products
                                 outside the model family, Seller shall, within
                                 ten (10) days of receipt of such request,
                                 notify Seller whether the requested change is
                                 acceptable and/or whether such changes will
                                 necessitate a change in the Required Shipping
                                 Date. *






          9.1.4  OTHER ORDERS. Other than for Guaranteed Orders, which are
                 addressed elsewhere herein, Seller shall use its best
                 commercially reasonable efforts to meet Buyer's Purchase
                 Orders. Where the Purchase Order is within the quantity
                 forecast in the rolling forecast provided in this Section 9.1,
                 Seller shall normally be able to meet Buyer's requirements.

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                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

               In the event that Seller believes that it will not be able to
               meet Buyer's requirements, Buyer and Seller shall cooperate in
               developing a mutually agreeable plan to provide appropriate
               quantities of Products to mitigate the effects on Buyer's
               operations.

     9.2  ISSUANCE, ACKNOWLEDGMENT AND ACCEPTANCE OF PURCHASE ORDER. Buyer shall
          issue and Seller shall handle Purchase Orders in accordance with the
          following requirements:

          9.2.1  ISSUANCE AND ACKNOWLEDGMENT OF RECEIPT; INVENTORY REPORTS.
                 Buyer shall order Products under this Agreement by issuing and
                 delivering to Seller one or more Purchase Orders transmitted by
                 facsimile, electronic document interchange ("EDI") or otherwise
                 delivered in writing to Seller. Seller shall confirm receipt of
                 the Purchase Order in writing within two (2) business days of
                 receipt thereof. Where technologically feasible, Seller shall
                 confirm receipt and acceptance of such Purchase Order using the
                 same transmission technique used by Buyer in placing the
                 Purchase Order. This confirmation shall not be deemed
                 acceptance of the Purchase Order. To assist Buyer in placing
                 Purchase Orders promptly, Seller shall make available to Buyer
                 a monthly inventory report, detailing Seller's inventory count
                 and planned production runs for the *
                 categorized by model of Product for Buyer's Co-Branded
                 Products. Seller's planned production runs shall be a good
                 faith statement of Seller's plans, but Seller shall not be held
                 to any particular production quantity by virtue of the planned
                 production run information furnished under this Section 9.2.1.

          9.2.2  REQUESTED SHIPPING DATE; DETAILS IN PURCHASE ORDER. Each
                 Purchase Order shall reference this Agreement, and shall state
                 the model number, Product description, quantity of Products
                 ordered, Buyer's desired shipping date (the "Requested Shipping
                 Date"), method of shipment, delivery/ship-to location, unit
                 price for each Product ordered and total purchase price for the
                 Purchase Order. Any Purchase Order intended by Buyer to be a
                 Guaranteed Order shall include the information required in
                 Section 9.1.2.

          9.2.3  ACCEPTANCE. Where the Purchase Order is in accordance with this
                 Agreement, Seller shall, *

                         confirm its acceptance in writing. Should Seller
                 believe that the Purchase Order is not in accordance with this
                 Agreement, Seller shall, in writing, reject such Purchase Order
                 and inform Buyer of the reasons for Seller's rejection *

                                                   In such case, Seller is not

                                     -24-
<PAGE>
 
                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

               deemed to have accepted the Purchase Order, unless Seller's
               rejection is arbitrary, in bad faith or is frivolous or is
               otherwise inconsistent with this Agreement. Seller's failure to
               reject any Purchase Order within the five (5) day period shall be
               deemed acceptance of the Purchase Order.

        9.2.4  REQUIRED SHIPPING DATE. Except for Guaranteed Orders, upon
               acceptance of each Purchase Order, Seller shall indicate the
               shipping date to which it commits ("Required Shipping Date.").
               With respect to Guaranteed Orders, where Buyer's Requested
               Shipping Date allows for the minimum Order Lead Time required on
               Guaranteed Orders, as specified in Section 9.1.2.3, Seller shall
               commit to a shipping date not later than Buyer's Requested
               Shipping Date.

     9.3  ELECTRONIC DOCUMENT INTERCHANGE. To facilitate transactions under this
          Agreement, the parties shall, upon the request of Buyer, substitute
          electronic data exchange for conventional paper-based documents when
          feasible. Each party agrees to provide "Electronic Data Interchange"
          access for Purchase Order transmission, acknowledgment of
          order/shipment, invoicing, order ship confirmation, inventory status
          and other related information. The parties shall cooperate in making
          their respective data processing and communications systems properly
          interact to provide Electronic Data Interchange and shall mutually
          agree upon a schedule and format for introducing Electronic Data
          Interchange.

     9.4  WAREHOUSING. Seller shall provide warehousing facilities sufficient to
          ensure timely delivery to all locations that Buyer has identified for
          delivery of Products. Should Seller's standard warehousing and
          shipping arrangements prove inadequate to meet Buyer's reasonable
          requirements, Seller shall remedy the problem promptly. Seller's
          warehousing facilities may be supplied by Seller or a third party.

     9.5  INABILITY TO MEET REQUIRED SHIPPING DATE. Once a Purchase Order has
          been accepted, Seller is expected to deliver the Products in such
          quantities, in such manner and in such time as specified in the
          Purchase Order, unless Buyer agrees upon otherwise. If Seller believes
          that Seller will be unable to comply with the terms of a Purchase
          Order that Seller has previously accepted, including accepting Buyer's
          Requested Shipping Date as the Required Shipping Date, Seller shall
          provide notice to Buyer of Seller's inability to comply as described
          below.  Seller's notice, however, shall not relieve it of liability
          for delay in performance unless the delay is otherwise excused under
          this Agreement.

     9.6  *

                                     -25-
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                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

                                       *

                                     -26-
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                        *CONFIDENTIAL INFORMATION;
                        HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION

     9.7  DISCREPANCIES. Buyer shall report to Seller any discrepancies
          concerning the quantity of Products shipped or drop-shipped within
          five (5) days following delivery, or whenever Buyer discovers the
          discrepancy, whichever comes later.

     9.8  DELIVERY. All Products shall be delivered freight prepaid to the
          delivery point provided in the Purchase Order. Buyer's delivery points
          include, but are not limited to, Buyer's or Affiliate warehouse,
          customer or retailer sites and other drop-ship locations, all such
          drop shipments being limited to a two hundred (200) unit minimum. Any
          Purchase Order may specify multiple delivery points, and Buyer shall
          be able to alter the delivery point address by notice to Seller, in
          writing, at least three (3) days prior to the shipping date.

     9.9  MODIFICATIONS TO PURCHASE ORDER. Except to the extent restricted by
          this Agreement, Buyer retains the right to modify or cancel, in whole
          or in part, any Purchase Order prior to complete performance thereof
          by Seller. Any such modification or cancellation shall be subject to
          the provisions set forth below and to this Agreement.

          9.9.1  MODIFIED OR CANCELED PURCHASE ORDER. Excepting for Guaranteed
                 Orders, Buyer may modify or cancel any Purchase Order through
                 notice to Seller and acknowledgment by Seller in accordance
                 with the procedure established in Section 9 for new Purchase
                 Orders, including scheduling. In the event of modification or
                 cancellation of a Purchase Order by Buyer, Seller may be
                 entitled to claim compensation as provided in Section 9.9.2.

          9.9.2  CHANGE IN COSTS. If any modification or cancellation of a
                 Purchase Order under this Section 9 causes a change in the cost
                 of Seller's performance of the Agreement, except modifications
                 or cancellations for cause as provided in Sections 9.8.1 and
                 9.10.1 or elsewhere in this Agreement, the purchase price to be
                 charged by Seller shall be equitably adjusted. Buyer shall
                 inform Seller of its intention to demand a price decrease due
                 to the variation, and Seller shall inform Buyer of its
                 intention to demand a price increase due to the variation *
                         after the receipt by the Seller of the modified or
                 canceled Purchase Order. Provided, however, that Buyer need not
                 give notice to Seller of Buyer's intention to claim a payment
                 reduction due to any cancellation or reduction in quantity of
                 Products. In such instances, Seller shall reduce appropriately
                 and automatically the invoice amount to reflect the reduced
                 quantity of Product ordered. The determination of any price
                 adjustment shall in no event delay any performance by Seller
                 under this Agreement. Where Seller claims a price adjustment
                 under this Section 9.9 upon the theory that it has performed
                 work that is not reusable in fulfilling its obligations under
                 other Purchase Orders issued 

                                     -27-
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

                 by Buyer, Seller must so demonstrate. In addition, Seller must
                 demonstrate that such non-reusable work cannot reasonably be
                 restocked or otherwise used by Seller in fulfillment of its
                 obligations to other customers.

    9.10  FURTHER DESCRIPTION. If mutually deemed necessary by the parties, a
          description of the forecasting and ordering processes, consistent with
          the terms hereof, may be developed to more specifically describe such
          processes, and such description will be set forth in Attachment B, to
          be attached to this Agreement subsequent to the date hereof. *

10   TERM
     ----

    10.1  TERM. Unless sooner terminated in accordance with the provisions of
          this Agreement, the initial term of this Agreement shall commence upon
          the date hereof and end on the fifth (5th) anniversary of the date
          hereof (such period of time being referred to as the "Term").

    10.2  EXTENDED TERM FOR CERTAIN PROVISIONS. As explicitly provided herein,
          certain provisions of this Agreement may have a longer term and shall
          survive the termination of other portions of this Agreement.

11   TITLE AND RISK OF LOSS
     ----------------------

          Title and risk of loss shall pass to Buyer upon delivery of the
          Products. Upon the conveyance of title to Products, Seller shall
          convey to Buyer all rights and title therein by appropriate documents
          with warranty of title, free and clear of all liens and encumbrances.
          Title to Seller's intellectual property, including software, patents,
          copyrights, trademarks and tradenames, shall not be conveyed to Buyer
          at any time.

12   PRODUCT SUPPORT
     ---------------

    12.1  TRAINING SUPPORT. Seller shall provide *
          training support to Buyer as provided below:

          12.1.1  TECHNICAL TRAINING. Seller will train Buyer's personnel in
                  connection with the installation, re-programming, use, and
                  maintenance of the Products. Consistent with the requirements
                  of Section 12.3, Seller shall give Buyer a reasonable number
                  of copies of Product documentation, including, but not limited
                  to, re-programming and installation instructions, standards 
                  and specifications, maintenance procedures and

                                     -28-
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

                  usage instructions, except as Seller considers to be
                  proprietary or confidential.

       12.1.2  SALES TRAINING. Seller shall train Buyer's sales personnel on
               the Products, including training materials for on-site sales
               personnel training, providing detailed feature and benefits
               summaries, configuration drawings, accessory descriptions,
               programming instructions and the like.

       12.1.3  CUSTOMER SERVICE TRAINING. Seller shall train Buyer's
               customer operations personnel, including training materials for
               on-site customer service training, providing detailed feature,
               configuration drawings, trouble shooting Q&A, and programming
               instructions.

       12.1.4  REPRODUCTION RIGHTS; UPDATED TRAINING MATERIAL.

               *

               Seller will provide Buyer with training documentation in both
               paper and electronic formats and for on-line documentation to be
               shared by multiple users. Seller will provide Buyer with updates
               to training manuals and training equipment and software at no
               charge to Buyer. Buyer will work with Seller to establish the
               training guidelines and modules. Seller will conduct training at
               Buyer's sites of choice with no                 each category of
               training defined in Sections 12.1.1 through 12.1.3. Seller will
               provide Buyer with *

                         Buyer will provide Seller with a single point of
               contact for updates and resolutions.

     12.2  TECHNICAL SUPPORT. Seller shall provide
           technical support to Buyer as described below:

               TELEPHONIC CONSULTATION. Beginning on the date hereof, Seller
               shall maintain, during normal business hours, a technical product
               support ("800") telephone "hotline" covering the Products. Buyer,
               by calling this number, shall have the ability to receive
               detailed technical support for Products, including answers to
               technical questions involving Product operation, fault diagnosis,
               inter-operability and other technical aspects of the Products.

     12.3  DOCUMENTATION. Seller shall supply Buyer with the documentation
           described below in both printed format and on upon magnetic storage
           medium. Where documentation exists in draft or preliminary form, it
           shall be supplied to Buyer in such draft or preliminary form, and
           updated as described in Section 12.4. All


                                     -29-
<PAGE>
 
           documentation supplied shall be in accordance with the best standards
           for similar Products, whether from Seller or other suppliers.

           12.3.1 TECHNICAL DOCUMENTATION. Except as Seller considers to be
                  proprietary or confidential, technical documents to be
                  supplied include, but are not limited to: block diagrams;
                  service manual (including theory of operation); spare parts
                  catalog; installation and preventive maintenance procedures;
                  training manual; configuration guide; installation and
                  planning guide; commercial/sales training instructions.

          12.3.2  FIRMWARE. Except as Seller considers to be proprietary or
                  confidential, Seller shall provide to Buyer a firmware manual,
                  including general description of firmware architecture, to the
                  extent appropriate for the level of maintenance performed by
                  Buyer.

          12.3.3  DELIVERY DATES AND REPRODUCTION. Complete sets of the
                  documents described in Sections 12.3.1 and 12.3.2, inclusive,
                  shall be delivered promptly on execution of this Agreement and
                  in correspondence with any addition or modification to
                  Products or the addition of new Products to this Agreement.

          12.3.4  SPARE PARTS. Seller shall prepare and provide to Buyer a
                  recommended list of spare parts identifying the quantities and
                  types recommended for maintenance of the Products the first
                  large quantity shipment of Products.

          12.3.5  TECHNICAL BULLETINS AND NOTES. Except as Seller considers to
                  be proprietary or confidential, Seller shall provide to Buyer,
                  without charge, all technical bulletins and notes related to
                  Products, whether issued periodically or aperiodically.

          12.3.6  TEST AND DIAGNOSTIC MODE INFORMATION. Except as Seller
                  considers to be proprietary or confidential, Seller shall
                  provide the information specified at Section 2.5 concerning
                  the technical interface to Products, including test and
                  diagnostic mode information.

    12.4  SURVIVAL AND EXTENDED TERM. Seller shall be responsible for revising
          and issuing its documentation and for providing Buyer with complete
          and up-to-date documentation as provided in Section 12.3 and for
          providing Buyer with technical support as provided in Section 12.2.
          Seller's obligations under Sections 12.2, 12.3 and this Section 12.4
          shall survive the term of this Agreement and shall end five (5) years
          after the delivery of the last unit of any Product under this
          Agreement.


                                     -30-
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                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

13   TERRITORY AND TRANS-SHIPMENT
     ----------------------------

     13.1  TERRITORY. Buyer shall be appointed as a nonexclusive distributor of
           the Products in the Territory.

     13.2  NO TRANS-SHIPMENT. During the term of this Agreement, Buyer shall not
           knowingly trans-ship, sell, or otherwise transfer the Products
           outside the Territory, but Buyer may ship products within its
           Territory, even if outside of an MTA. *

14   WARRANTY AND SERVICE REPAIR
     ---------------------------

     14.1  PRODUCT WARRANTY. Without reducing the scope of warranties provided
           by Seller elsewhere in this Agreement or that may be imposed upon
           Seller at law or in equity, Seller hereby warrants to Buyer as
           follows:

           14.1.1  INTER-OPERABILITY TESTING. Seller shall certify that it has
                   tested its PCS 1900 Products with PCS 1900 network
                   infrastructure manufactured by Seller, Northern Telecom,
                   Motorola, Nokia and AT&T, to the extent these manufacturers
                   have a functioning PCS 1900 test system and are willing to
                   cooperate with Seller in such compatibility testing, and that
                   the results of such tests demonstrate proper inter-
                   operability as of the date of testing. Seller shall
                   periodically inform Buyer of the status of its compatibility
                   testing and shall provide such information to Buyer when
                   Seller introduces a new configuration Product.

           14.1.2  REGULATORY APPROVALS. Seller warrants that all Products have
                   received all necessary regulatory approvals.

           14.1.3  COMPLIANCE. Seller warrants that all Products will work on
                   the full PCS spectrum, Bands A through F, inclusive, except
                   as may be specifically excluded on a product-by-product basis
                   in Buyer's sole discretion.

           14.1.4  GOOD TITLE. Seller warrants that it has good title to the
                   Products and the right to sell them to Buyer free of any
                   proprietary rights of any other party, security interest,
                   lien or any other encumbrance whatsoever.

           14.1.5  OPERATIONS WARRANTY. Seller warrants that Products furnished
                   by Seller hereunder shall be free from defects in material,
                   workmanship and title, and shall conform to its published
                   specifications at its time of original purchase. Seller's
                   obligations set forth below are conditioned on Buyer's giving
                   written notice to Seller. *

                   Sellers obligations under this Section 14.1.5 shall not apply
                   to any Product, or part thereof, which (i) has been modified
                   or otherwise altered

                                     -31-
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                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
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               other than pursuant to Seller's written instructions or written
               approval, (ii) is normally consumed in operation or, (iii) is not
               properly stored, installed, used, maintained or repaired, or,
               (iv) has been subjected to any other type of misuse or
               detrimental exposure, or has been involved in an accident.

       14.1.6  If a Product fails to meet the foregoing Warranties, Seller
               shall correct the failure at its option (i) by repairing any
               defective or damaged part or parts thereof, or (ii) by making
               available at Seller's factory any necessary repaired or
               replacement parts.  Any repaired or replacement part furnished
               hereunder shall be warranted for the remainder of the warranty
               period of the Products in which it is installed.  Where such
               failure cannot be corrected by Seller's reasonable efforts, the
               parties will negotiate an equitable adjustment in price.  To be
               eligible for no-charge labor, service must be performed by an
               authorized "Ericsson Servicer" approved for these purposes, at
               its place of business, during normal business hours for mobile or
               personal equipment.

    14.2  SOLE REMEDY; EXCESSIVE FAILURE RATES. Seller's sole and exclusive
          obligation under these Warranties is the repair or replacement of
          Products manufactured or shipped by Seller that are defective, and the
          return shipment of such repaired or replacement items; provided,
          however, in the event that more than *

                    Seller shall: *

 



    14.3  LIMITATION. THE WARRANTIES SET FORTH IN THIS SECTION 14 ARE THE ONLY
          WARRANTIES, EITHER EXPRESS OR IMPLIED, THAT ARE MADE BY SELLER TO
          BUYER AS TO THE PRODUCTS, AND ALL OTHER WARRANTIES, EXPRESS OR
          IMPLIED, STATUTORY OR COMMON LAW, ARE HEREBY EXPRESSLY DISCLAIMED,
          INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
          MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

  


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                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

    14.4  EXTENDED WARRANTY. Seller shall offer Buyer and shall make available
          to Buyer's customers, either directly or through Buyer, optional
          extended warranty coverage for the Products in one (1) year increments
          at additional cost as specified in Attachment D.

    14.5  END-USER WARRANTY.  In addition, each Product shall come with such
          warranty to the End-User, as Seller shall establish as its standard
          End-User warranty for the Products from time to time, the current such
          standard warranty to the End-User being substantially in the form
          attached hereto as Attachment H.

    14.6  SERVICE REPAIR AND REPLACEMENT.  Seller shall maintain one or more
          authorized service centers.  The authorized service centers shall be
          equipped to repair or exchange, at no cost to the owner of the
          Product, defective Products that are within the warranty period, as
          described above.  For products requiring repair or replacement after
          expiration of the applicable warranty period, Seller's authorized
          service center shall implement an exchange and repaid policy at
          reasonable rates.

    14.7  Survival and Term. THE RIGHTS AND WARRANTIES GRANTED IN THIS SECTION
          14 SHALL SURVIVE THE TERM OF THIS AGREEMENT AND SHALL REMAIN VALID FOR
          THE PERIODS DURING WHICH THE RIGHT OR WARRANTY IS PROVIDED AS
          DESCRIBED IN THIS SECTION 14.

14.15  TERMINATION; LIMITATION OF LIABILITY
       ------------------------------------

    15.1  DEFAULT.  In the event of a monetary breach of this Agreement, the
          non-breaching party shall have the right to terminate this Agreement
          upon *

                 In the event of a non-monetary material breach of this
          Agreement, the non-breaching party shall have the right to terminate
          this Agreement *                        unless such breach and any
          intervening breaches have been cured within *

          provided, however, in the event that such breach shall not reasonably
          be capable of being cured within *
          the Agreement shall not terminate, unless the breaching party has
          failed to diligently pursue cure of the breach within *
          or in any event, has failed to cure the breach within *
          provided, further, however, that in the event of a breach under
          Section 23, the non-breaching party shall have the right to terminate
          this Agreement for cause immediately upon the occurrence of such
          breach.

     15.2  FAILURE TO PURCHASE *
          If, in any calendar year during the Term, Buyer purchases from Seller
          less than *                             Seller may, in its discretion,
          within *
                    terminate this Agreement upon written notice, in which
          event:
   


                                     -33-
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                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION
 
            (a)  Seller may decline any further orders for Product; and

            (b)  All orders scheduled to be shipped *
                         shall be shipped and otherwise provided according to
                 the terms of this Agreement, except that payment for such
                 shipment shall be C.O.D.; and

            (c)  For orders scheduled to ship more than Seller may cancel such
                 orders by written notice included with the notice of
                 termination referenced herein.

    15.3  BANKRUPTCY.  Either party may terminate this Agreement by written
          notice in the event that the other party (i) applies for or consents
          to the appointment of, or the taking of possession by a receiver,
          custodian, trustee, or liquidator of itself or of all or a substantial
          part of its property, (ii) makes a general assignment for the benefit
          of its creditors, (iii) commences a voluntary proceeding under the
          Federal Bankruptcy code or under any other law relating to relief from
          creditors generally, or (iv) fails to contest in a timely or
          appropriate manner, or acquiesces in writing to, any petition filed
          against it in an involuntary proceeding under the Federal Bankruptcy
          Code or under any other law relating to relief from creditors
          generally, or any application for the appointment of a receiver,
          custodian, trustee, or liquidator of itself or of all or a substantial
          part of its property, or its liquidation, reorganization, dissolution,
          or winding-up.

    15.4  LIMITATION OF LIABILITY.

          15.4.1  THE TOTAL LIABILITY OF SELLER, ON ANY AND ALL CLAIMS, WHETHER
          IN CONTRACT, WARRANTY, TORT (INCLUDING NEGLIGENCE OR PATENT
          INFRINGEMENT) OR OTHERWISE, ARISING OUT OF, CONNECTED WITH, OR
          RESULTING FROM THE PERFORMANCE OR NON-PERFORMANCE OF ANY AGREEMENT
          RESULTING HEREFROM OR FROM THE MANUFACTURE, SALE, DELIVERY, RESALE,
          REPAIR, REPLACEMENT OR USE OF THE PRODUCTS OR THE FURNISHING OF ANY
          SERVICE, SHALL NOT EXCEED THE PRICE ALLOCABLE TO THE PRODUCT OR
          SERVICE WHICH GIVES RISE TO THE CLAIM.  EXCEPT AS TO TITLE, ANY SUCH
          LIABILITY SHALL TERMINATE UPON THE EXPIRATION OF THE APPLICABLE
          WARRANTY PERIOD SPECIFIED IN THE ARTICLE ENTITLED "WARRANTY".

          15.4.2  Where a remedy, including a series of optional remedies or
          multiple remedies, is set forth in the Agreement, and/or the
          Infrastructure Agreement, those remedies shall be the sole and
          exclusive remedies for the breach or event for


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                          *CONFIDENTIAL INFORMATION;
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          which it is specified. Where no specific remedy is provided, the non-
          defaulting party shall have the right to recover from the defaulting
          party only its direct damages arising out of that breach or event.
          NOTWITHSTANDING ANYTHING TO THE CONTRARY CONTAINED IN THIS AGREEMENT,
          IN NO EVENT, WHETHER AS A RESULT OF BREACH OF CONTRACT, WARRANTY, TORT
          (INCLUDING BUT NOT LIMITED TO NEGLIGENCE OR INFRINGEMENT) SHALL SELLER
          OR BUYER BE LIABLE UNDER THIS AGREEMENT FOR ANY CONSEQUENTIAL OR
          INCIDENTAL DAMAGES OF ANY NATURE WHATSOEVER, INCLUDING LOST PROFITS,
          OF THE OTHER PARTY, REGARDLESS OF WHETHER SUCH DAMAGES ARE FORESEEABLE
          OR WHETHER A PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF DAMAGES.

    15.5  RIGHTS OF PARTIES UPON TERMINATION BY EITHER PARTY. In the event of a
          termination by Buyer or Seller pursuant to the terms hereof, the
          further obligations of the parties under this Agreement shall be
          terminated, except as may be specifically provided in this Agreement
          for provisions that survive termination. The obligation of the parties
          to maintain the confidentiality of information as provided in Section
          16, however, shall continue as provided in Section 16.4. The parties
          shall make an equitable accounting of any sums due Seller for partial
          deliveries, such accounting to be completed *


16   CONFIDENTIALITY
     ---------------

     16.1 CONFIDENTIAL INFORMATION DEFINED. During the term of this Agreement
          and thereafter it may be necessary for the parties to mutually
          exchange certain information, data and material of a proprietary
          nature whether relating to marketing, technical, financial and other
          matters. To be treated as confidential hereunder ("Confidential
          Information"), information disclosed in writing shall be marked as
          confidential or proprietary, and the disclosing party shall indicate
          the confidential nature of verbal information at the time of
          disclosure.  All Confidential Information shall:

          16.1.1 BE HELD IN CONFIDENCE. Be received and retained in the
                 strictest confidence by the parties and will be deemed to be
                 proprietary information of the disclosing party and the
                 recipient(s) of such Confidential Information agree(s) that it
                 (or they) will not disclose it to third parties and further,
                 will treat such information, data or material as proprietary
                 using the same degree of care that it (or they) would normally
                 use in protecting its (or their) own proprietary information.


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                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

          16.1.2  LIMITED USE. Be used by the parties hereto solely for the
                  purpose of implementing this Agreement.

     16.2  EXCEPTIONS. The provisions of Section 16.1 above shall not apply to
           any Confidential Information which:

              (a)  Is known by the receiving party prior to the date hereof, and
                   is not subject to or in violation of an obligation of
                   confidentiality;

              (b)  Is or becomes public knowledge other than by default of the
                   receiving party;

              (c)  Is obtained by the receiving party from a bona-fide third
                   party having free right of disposal of such information;

              (d)  Is wholly and independently developed by receiving party
                   without reference to the Confidential Information; or

              (e)  The receiving party is required to disclose pursuant to a
                   valid order of a court or other governmental body or any
                   political subdivision thereof, provided, however, that the
                   recipient of the information shall first have given notice to
                   the disclosing party and made a reasonable effort to obtain a
                   protective order requiring that the information and/or
                   documents so disclosed be used only for the purposes for
                   which the order was issued.

     16.3 SURVIVAL. This Section 16 shall survive any termination of this
          Agreement for a period of *

17   FORCE MAJEURE
     -------------

     17.1 FORCE MAJEURE. Neither of the parties hereto shall be liable for any
          damages or penalty for delay in performance of its obligations under
          this Agreement when such delay is due to acts of God, acts of civil or
          military authority, fires, floods, epidemics, war or riots, industry-
          wide strikes, lockouts or other labor disputes, delays in
          transportation or shortage of materials, or any other causes beyond
          the reasonable control of such party. The party so affected shall,
          upon giving prompt written notice to the other party of the delay and
          the cause therefore, be excused from performance to the extent of the
          prevention, restriction or interference; provided, however, that the
          party so affected shall use reasonable efforts to avoid or remove such
          causes of nonperformance and shall continue performance hereunder with
          the utmost dispatch whenever such causes are removed. In the event of
          Force Majeure delays, the time for performance shall be extended by
          mutual agreement of the parties as provided above, but in no case
          shall the 


                                     -36-
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                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
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          extension exceed a day-for-day extension based upon the duration of
          the act of Force Majeure.

    17.2  BUYER'S RIGHT TO TERMINATE FOR FORCE MAJEURE'. Should Force Majeure
          prevent Seller from timely performing under this Agreement, where the
          Force Majeure delays Seller's performance by such time that, in
          Buyer's reasonable judgment, Buyer has lost the benefit of the bargain
          or where the delay is such that Buyer must reasonably look to
          substitute supplies to protect Buyer's position, Buyer has the right
          to terminate this Agreement, notwithstanding the provisions of Section
          17.1.

    17.3  SELLER'S RIGHT TO TERMINATE FOR FORCE MAJEURE'. Should Force Majeure
          prevent Buyer's performance under this Agreement for a period of more
          than *
               Seller has the right to terminate this Agreement, notwithstanding
          the provisions of Section 17.1.

18   PRODUCT LIABILITY INDEMNIFICATION
     ---------------------------------

     Notwithstanding anything to the contrary contained herein, Seller agrees to
     defend and indemnify Buyer, its officers, agents and employees, from and
     against any damages, claims, demands, liabilities and expenses (including
     reasonable attorneys' fees) that arise out of, or result from, the death or
     bodily injury to, or damage to tangible property of any third party
     resulting from solely from the use of a Product produced by Seller or
     Seller's affiliate, except (a) to the extent the defect is in a design or
     specification provided by Buyer or (b) the operation of the PCS network or
     system caused the use of the Product to result such injury or loss.  Seller
     shall pay all costs, damages and reasonable attorneys' fees that a court
     awards as a result of such claim provided that: (i) Seller has sole control
     of the defense and related settlement negotiations; (ii) Buyer provides
     Seller with assistance, information and authority reasonably necessary for
     Seller to perform its obligations under this Section 18; and (iii) Buyer
     notifies Seller in writing within thirty (30) days of the discovery of the
     claim. Seller shall not be responsible for any settlement made without its
     consent.

19   INTELLECTUAL PROPERTY INDEMNIFICATION
     -------------------------------------

     19.1  Seller warrants that the Products furnished hereunder shall be
           delivered free of any rightful claim of any third party for
           infringement of any United States patent, copyright, trademark, or
           trade secret. If Buyer notifies Seller promptly of the receipt of any
           claim that the Products infringe a United States patent, copyright,
           trademark, or trade secret and gives Seller information assistance
           and exclusive authority to settle and defend such claim, Seller at
           its own expense shall defend, or may settle, any suit or proceeding
           against Buyer so far as based on a claimed 

                                     -37-
<PAGE>
 
          infringement which breaches this warranty. If, in any such suit
          arising from such claim, the continued use of the Products for the
          purpose intended is enjoined by any court of competent jurisdiction,
          Seller shall, at its expense and option, either: (i) procure for Buyer
          the right to continue using the Products, or (ii) modify the Products
          so that they become non-infringing, or (iii) replace the Products or
          portions thereof so that they become non-infringing, or (iv) accept
          the return of the Products and refund the purchase price (less
          reasonable depreciation for use). The foregoing states the entire
          liability of Seller for patent, copyright, trademark, or trade secret
          infringement by the Products and is subject to any limitation of total
          liability set forth in this Contract.

    19.2  The preceding subsection 19.1 shall not apply to:  (i) any portion of
          the Products that is manufactured to Buyer's design, or (ii) the use
          of the Products for a purpose not intended or in conjunction with any
          other apparatus or material not supplied by Seller to the extent that
          such conjoined use causes the alleged infringement.  As to any portion
          of the Products or use described in the preceding sentence, Seller
          assumes no liability whatsoever for patent, copyright, trademark or
          trade secrets infringement.

    19.3  Seller will not be responsible for any compromise or settlement made
          without its written consent.  In no event shall Seller indemnify
          purchaser for consequential damages.

20   DISPUTE RESOLUTION
     ------------------

    20.1  INTERNAL ESCALATION. In the event that a dispute arises over the
          interpretation or application of any provision of this Agreement or
          the grounds for termination hereof, any party may request that the
          parties meet within ten (10) days of such request and seek to resolve
          the dispute by negotiation of the appropriate officers of each party,
          with the request for resolution being passed to each officer at the
          next higher level of authority, in turn. Such meetings shall be
          attended by individuals with decision-making authority, to attempt in
          good faith to negotiate a resolution of the dispute prior to pursuing
          other available remedies. If, within ten (10) days after the first
          such meeting, the parties have not succeeded in negotiating a
          resolution of the dispute, or if it has not been possible to schedule
          a meeting within ten (10) days following request thereof by a party, a
          party may request that such dispute be mediated in accordance with
          Subsection 20.2. Notwithstanding anything to the contrary contained in
          the foregoing, any disputes with respect to intellectual property
          rights shall be submitted to the courts and not subject to the
          provisions of Subsection 20.2, unless otherwise agreed by both Buyer
          and Seller.

    20.2  MEDIATION. If the attempts to resolve a dispute described in
          Subsection 20.1 fail, then such dispute will be mediated by a mutually
          acceptable mediator to be

                                     -38-
<PAGE>
 
          chosen by Seller and Buyer within twenty (20) days after written
          notice by either party demanding mediation. A party may not
          unreasonably withhold consent to the selection of a mediator, and
          Seller and Buyer shall share the costs of mediation equally. Each
          party shall pay its own attorneys' fees. By mutual agreement, however,
          Seller and Buyer may postpone mediation until each has completed some
          specified but limited discovery regarding the dispute. The parties may
          also agree to replace mediation with some other form of alternate
          dispute resolution, such as neutral fact-finding or mini-trial.

    20.3  ARBITRATION OF DISPUTES. Any controversy or claim arising out of or
          relating to this Agreement for the breach hereof which cannot be
          settled by the parties pursuant to Section 20.1 and 20.2, shall be
          settled by arbitration in accordance with the commercial arbitration
          rules of the American Arbitration Association as set forth herein.

          20.3.1  SELECTION OF ARBITRATORS. Each party may select one
                  arbitrator. Selection shall be completed within ten (10) days
                  of the receipt of a demand for arbitration. If either party
                  fails to select an arbitrator within such ten (10) day period,
                  the one selected shall act as sole arbitrator. If two (2)
                  arbitrators have been selected, the two arbitrators selected
                  shall select a third within fifteen (15) days after their
                  selection. If they fail to do so, the third arbitrator shall
                  be selected by the American Arbitration Association. The
                  arbitrators shall set a date of hearing no later than sixty
                  (60) days from the date all arbitrators have been selected and
                  shall enter a decision within thirty (30) days at the end of
                  the proceeding

          20.3.2  LANGUAGE. All proceedings shall be conducted in the English
                  language.

          20.3.3  LOCATION. The arbitration shall take place at a location to be
                  agreed upon by the parties. If the parties are unable to
                  agree, the arbitrators shall select a location in the District
                  of Columbia or the Counties of Arlington or Fairfax, Virginia
                  for the arbitration.

          20.3.4  FRCP TO APPLY. In any such arbitration proceeding the
                  arbitrators shall adopt and apply the provisions of the
                  Federal Rules of Civil Procedure relating to discovery so that
                  each party shall allow and may obtain discovery of any matter
                  not privileged which is relevant to the subject matter
                  involved in the arbitration to the same extent as if such
                  arbitration were a civil action pending in a United States
                  District Court; provided, however, that each party shall be
                  entitled to no more than four (4) depositions upon oral
                  examination of no more than one (1) day in length each.

                                     -39-
<PAGE>
 
          20.3.5  FINAL AWARD. The award of any arbitration shall be final,
                  conclusive and binding on the parties hereto.

          20.3.6  REMEDY. The arbitrators may award any legal or equitable
                  remedy. The arbitration award shall include an award of
                  attorney's fees, in the amount of such fees, to the prevailing
                  party. Judgment upon any arbitration award may be entered and
                  enforced in any court of competent jurisdiction.

          20.3.7  INJUNCTIVE RELIEF. Either party to an arbitration hereunder
                  may bring an action for injunctive relief against the other
                  party if such action is necessary to preserve jurisdiction of
                  the arbitrators or to maintain status quo pending the
                  arbitrators decision. Any such action called pursuant to this
                  paragraph shall be discontinued upon assumption of
                  jurisdiction by the arbitrators and their opportunity to
                  consider the request for equitable relief pending final
                  decision in the arbitration.

     20.4 CONTINUE TO PERFORM. The parties shall continue to perform all
          obligations under the Agreement pending the above-described dispute
          resolution proceedings, subject to full reservation of rights at law
          or under this Agreement.

21   NON-EXCLUSIVE AGREEMENT
     -----------------------

     This Agreement is a nonexclusive agreement. Buyer expressly reserves the
     right to contract with others for any of the goods or services it may
     require, including those that may duplicate Products.

22   INSURANCE
     ---------

     22.1  SELLER TO MAINTAIN. Seller shall maintain and keep in force all risk
           insurance, in form and substance and with insurers reasonably
           satisfactory to Buyer, covering all Products delivered to Buyer the
           risk of loss to which has not passed to Buyer, and shall furnish
           Buyer with proof that such insurance has been obtained and is in
           force.

     22.2  BUYER TO MAINTAIN. Upon risk of loss passing to Buyer, Buyer shall
           maintain and keep in force all risk insurance, in form and substance
           and with insurers reasonably satisfactory to Seller, covering all
           Products delivered to Buyer the title to which has not passed to
           Buyer, and shall furnish Seller with proof that such insurance has
           been obtained and is in force. Upon request from Seller, Seller shall
           be named a co-insured with respect to the amount of all unpaid
           invoices.


                                     -40-
<PAGE>
 
     22.3  LEVEL OF INSURANCE. Seller shall at all times while performing
           services on Buyer's premises carry insurance with limits not less
           than the limits described as follows:

              (a)  Employer's General Liability: Limits $1,000,000.

              (b)  Comprehensive General Public Liability:  $1,000,000 single
               limit bodily injury and property damage combined; such coverage
               shall  include a broad form liability rider, completed operations
               coverage rider and contractual liability rider.

              (c)  An umbrella policy: with $1,000,000 single limit bodily
               injury and property damage combined.

              (d)  Workmen's Compensation: maintained at least at the level
               required by statute in the states in which Seller is to perform
               work under this Agreement.

     22.4 CERTIFICATES OF INSURANCE. Each party shall provide the other with
          certificates of insurance (i) evidencing the insurance to be carried
          under this Article 22, naming the other party as an additional insured
          and (ii) including provisions that such insurance policy shall not be
          subject to cancellation, expiration or reduction without thirty (30)
          days written notice to the other party.

     22.5 NO WAIVER. Notwithstanding the requirements as to insurance to be
          carried, the insolvency, bankruptcy or failure of any insurance
          company carrying insurance for either party, or failure of any such
          insurance company to pay claims accruing, shall not be held to waive
          any of the provisions of this Agreement or relieve either party from
          any obligations under this Agreement.

23   ASSIGNMENT
     ----------

     23.1 CONSENT REQUIRED. Except as otherwise expressly provided in this
          Agreement, no party shall have the right to assign its rights or
          delegate its duties under this Agreement or any Purchase Order
          hereunder, without the prior written consent of the other party
          hereto, which consent shall not be unreasonably withheld; provided,
          however, that Seller hereby consents to Buyer's assignment of its
          rights and delegation of its duties either in whole or in part under
          this Agreement or any Purchase Order hereunder to any present or
          future Affiliate of such Buyer, provided that Buyer shall guarantee
          the payment by, and performance of, any such Affiliate and Buyer shall
          give written notice of any such assignment.

     23.2 INVALID WITHOUT COMPLIANCE. Any attempted assignment or delegation in
          contravention of this Section 23 shall be void and of no effect and
          shall be 

          


                                     -41-
<PAGE>
 
          grounds for immediate termination by the non-breaching party,
          for cause, as provided in Section 15 hereof.

     23.3 ASSIGNS. Subject to the provisions of Section 23.1 above, this
          Agreement shall inure to the benefit of and be binding upon the
          respective successors and assigns, if any, of the parties hereto.

24   NOTICES
     -------

     Except as otherwise provided in this Agreement, or applicable Purchase
     Order, all notices or other communications hereunder shall be deemed to
     have been duly given when made in writing and mailed by certified mail,
     return receipt request, facsimile transmission upon confirmation of
     receipt, overnight courier or hand delivery to the parties at the addresses
     set forth below or at such other addresses as may be designated by the
     parties in writing:

To:  Seller:
          ERICSSON INC.
          Triangle Drive Address
          Research Triangle Park, NC 27709
          Attn: Carlton Peyton
          Phone: 919-990-7336
          Fax: 919-990-7456

To:  Buyer:
          Omnipoint Communications, Inc.
          Attn:  Stephen W. McCrudden
          Mountain Lakes Corporate Center
          49 Old Bloomfield Rd.
          Mountain Lakes, New Jersey  07046
          Phone: 201-257-2481
          Fax: 201-257-2425


          with a copy, which shall not constitute notice, to:

          Edwin M. Martin, Jr.
          Piper & Marbury L.L.P.
          1200 Nineteenth Street, N.W.
          Washington, DC  20036
          Fax:  (202) 223-2085


                                     -42-
<PAGE>
 
          Telephone:  (202) 861-3900

25   PUBLICITY
     ---------

     Except with respect to Co-Op Advertising (for which Seller is allowed to
     use Buyer's name in accordance with Buyer's guidelines), Seller shall
     submit to Buyer and Buyer shall submit to Seller, as the case may be, all
     advertising, sales promotion, press releases and other publicity relating
     to the subject matter of this Agreement wherein Buyer's or Seller's name or
     names (including the names of Affiliates) are mentioned or language, signs,
     markings or symbols are used from which the connection of a Buyer's or
     Seller's name or names therewith may, in Buyer's or Seller's judgment, as
     applicable, be reasonably inferred or implied. Seller or Buyer, as
     applicable, shall not publish or use such advertising, sales promotion,
     press release or publicity matter without Buyer's Seller's, as applicable,
     prior written approval, which approval may be withheld or delayed for any
     or no reason.

26   COMPLIANCE WITH LAWS; GOVERNING LAW
     -----------------------------------

     Each party shall comply with all applicable federal, state and local laws,
     regulations and codes, including the procurement of permits and licenses
     when needed, in the performance of this Agreement. Each party shall
     indemnify the other party against any loss or damage that may be sustained
     by reason of such party's failure to comply with such federal, state and
     local laws, regulations and codes.  This Agreement shall be construed and
     enforced in accordance with the laws of the State of New York, without
     regard to the conflict of laws of New York or any other state.

27   WAIVERS OF DEFAULT
     ------------------

     Waiver by a party of any default by another party shall not be deemed a
     waiver by the non defaulting party of any other default.  Failure of a
     party to exercise a right or remedy shall not be deemed a waiver of that
     right or remedy.

28   AMENDMENTS
     ----------

     No provisions of this Agreement or any Purchase Order shall be deemed
     waived, amended or modified by a party, unless such waiver, amendment or
     modification is in writing and signed by the authorized representative of
     the party against whom it is sought to enforce such waiver, amendment or
     modification.


                                     -43-
<PAGE>
 
29   ORDER OF PRECEDENCE
     -------------------

     During the Term, Buyer's purchase of Products from Seller shall be deemed
     to be purchased under the terms and conditions of this Agreement. The terms
     and conditions of Buyer's Purchase Order, Seller's acknowledgments,
     invoices or any other writings by either party which differ from the terms
     hereunder shall not be effective unless specifically accepted in writing by
     amendment to this Agreement made separate and apart from said terms and
     conditions and signed by all of the parties to this Agreement.

30   HEADINGS
     --------

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

31   SEVERABILITY
     ------------

     If any provision or any part of a provision of this Agreement shall be
     invalid or unenforceable, such invalidity or unenforceability shall not
     invalidate or render unenforceable the entire Agreement, but rather the
     entire provision or the Agreement shall be construed as if not containing
     the particular invalid or unenforceable provision or provisions, and the
     rights and obligations of the parties shall be construed and enforced
     accordingly, provided, that the deletion of such provision does not change
     the intent of the Agreement.

32   SURVIVAL
     --------

     The provisions contained in this Agreement that by their sense and context
     are intended to survive the cancellation or termination of this Agreement
     or any Purchase Order hereunder shall survive such Cancellation and
     termination.

33   LICENSE
     -------

     Except as specifically provided in Section 9 hereof, no licenses, express
     or implied, under any patents, copyrights, trademarks or trade secrets are
     granted by Buyer or Seller to the other hereunder.

34   PARTY RELATIONSHIP
     ------------------

     It is expressly understood that the parties intend by this Agreement to
     establish the relationship of independent contractors. No party shall have
     any authority to create or assume in the name of or on behalf of the other
     party any obligation, express or implied, 


                                     -44-
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION
     
     nor to act or to purport to act as the agent or legally empowered
     representative of the other party hereto for any purpose whatsoever.

35   COUNTERPARTS
     ------------

     This Agreement may be executed in two (2) separate counterparts, each of
     which shall be deemed an original and both of which taken together shall
     constitute one and the same instrument.

36   ATTACHMENTS AND INCORPORATION
     -----------------------------

     36.1 INCORPORATION. The following documents attached hereto are
          incorporated herein by reference and made a part of this Agreement
          with the same force and effect as though set forth in their entirety
          herein (such documents together with this Agreement are herein
          referred to as the "Agreement").

          ATTACHMENT  DESCRIPTION
          ----------  -----------
          Attachment A-1  Description of CH337/CF337 (specifications)
          Attachment A-2  Description of CH388/CF388 (specifications)
          Attachment A-3  Description of CA318 EFR (specifications)
          Attachment B  Forecasting and Ordering Processes (on an "if required
               basis")
          Attachment C  Dates for Completion of Attachments
          Attachment D  Prices
          Attachment E  *
          Attachment F  (Reserved)
          Attachment G  * 
          Attachment H  End-user warranty
          Attachment I  Database Format
          Attachment J  Advertising Display Material
          Attachment K  Return Policy

     36.2 ORDER OF PRIORITY. In the event of any conflict or inconsistency
          among the provisions of this Agreement and the documents attached and
          incorporated herein, such conflict or inconsistency shall be resolved,
          by giving precedence to this Agreement and thereafter to the
          Attachments.

37   ENTIRE AGREEMENT
     ----------------

       This Agreement constitutes the entire agreement between the parties with
       respect to the subject matter thereof. All prior agreements,
       representations, statements, negotiations, understandings and
       undertakings are superseded hereby.


                                     -45-
<PAGE>
 
In Witness Hereof, the Parties Hereby Execute this Agreement Below.
<TABLE>
<CAPTION>
 
SELLER:                                   BUYER:
<S>                                       <C>
 
Ericsson Inc.,                            Omnipoint Communications Inc.,
a Delaware Corporation                    a Delaware Corporation
 
 
 
By:  /s/Anders Torstensson             By:  /s/George F. Schmitt
     ------------------------------         -----------------------------------

Name: [Print]Anders Torstensson        Name: [Print]George F. Schmitt
      ------------------------------         ----------------------------------
 
Title:    Executive Vice President     Title:             President             
        ----------------------------           -------------------------------
</TABLE>



                                     -46-
<PAGE>
 
                                                     ATTACHMENT A-1 TO EXHIBIT 3

<PAGE>
 
Attachment A-1
Omnipoint Communications Inc./Ericsson Inc.

         PCS 1900 SINGLE-MODE HANDSET SPECIFICATIONS - CH-337 / CF337

THE 337 FAMILY OF PHONES
- ------------------------

Ericsson is now selling its first generation PCS 1900 phone, the CH 337, in the
US market.  The CH 337 was the first commercially available PCS 1900 phone and
was the first product used to place an official PCS 1900 call.  The handset was
also used for American Personal Communication's first commercial call during
their network launch on November 15, 1995.  This product is the market leader in
size, weight, talk time and standby time

There will also be a flip version of this phone, the CF 337, with basically the
same functionality as the CH 337 handset





                                      -1-
<PAGE>
 
 
1.1.  HANDSET GENERAL
- - Flip and non-flip style phones are offered to give a greater sense of physical
  differentiation. Changes in feature set, plastic housing color, and
  accessories can also be made to drive product derivatives into Basic and
  Advanced segments. Minimum volume requirements will vary depending on the
  degree and type of customization required .
- - The Ericsson 337 operates in all licensed PCS 1900 bands, A-F.
- - Battery life:
  ------------

<TABLE>
<CAPTION>

- --------------------------------------------------------------------------------
CH337 & CF337                550mAh NiMH       600mAh NiMH       1200mAh NiMH
- --------------------------------------------------------------------------------
<S>                          <C>               <C>               <C>
Standby with DRX
 
                             22 hours          24 hours          48 hours
- --------------------------------------------------------------------------------
Talk Time at
1.0W output
without DTX                  140 minutes       160 minutes       300 minutes
- --------------------------------------------------------------------------------
</TABLE>
DRX - Discontinuous Reception, DTX-Discontinuous Transmission 
Estimated battery performance for the 337-family of handsets as of 2Q.96.


- - Ericsson handsets are lightweight and compact and have been ergonomically
  designed to fit comfortably in the user's hand and against the ear and face.

1.2.  SIM
- - All Ericsson PCS 1900 handsets support mini-SIM cards as specified in the
  applicable GSM standards.
- - SIM cards are located underneath the battery where they are easily accessible,
  but well protected.







                                      -2-
<PAGE>
 
1.3.  KEYPAD
- - Keypad keys are raised, offer tactile response, depress to flush when pressed
  and facilitate one-handed operation of the phone.
- - The power up button must be pressed and held in order to power the phone on
  or off.
- - All Ericsson PCS 1900 models have a keyguard function. Calls to the emergency
  number can be made when the keypad is locked. Answering a call will
  automatically unlock the keypad. In addition, flip models offer an extra
  degree of keypad protection.
- - All Ericsson PCS 1900 models can insert special characters such as "+" and
  pause into numeric dialing strings.
- - Ericsson's MMI does not require a dedicated alpha key.
- - "Yes/YES" (i.e. Send) and "On Hook/No" (i.e. End) keys are color coded green
  and red respectively.
- - Keys are backlit to facilitate use in the dark; backlighting is activated
  automatically following a key press or incoming call and remains illuminated
  20 seconds.
- - Pips are molded into the 5 key and menu keys to facilitate tactile feel and
  use.

1.4.  DISPLAY
- - The 337 utilizes a 5 x 7 pixel dot matrix LCD with 3 rows of 12 characters.
  All icons are displayed in the same 3 by 12 area.
- - The display continuously shows: signal strength, battery status, SMS text
  message waiting (if any and supported by the network), voice message waiting
  (if any and supported by the network), and network/roaming information.
  Diverted call status is displayed during power on cycle and can be checked by
  accessing the menu system. Home zone indicators are not currently specified,
  but once standards are set, Ericsson intends to comply.
- - Display backlighting is activated automatically following a key press or
  incoming call and remains illuminated for 20 seconds.

1.5.  RING TONE AND AUDIBLE ALERTS
- - Ring level, pitch and melody are adjustable (8 choices of tones and
  melodies).
- - Two short beeps indicate that a voice or SMS message has been received.
- - It is possible to select silent ringing for voice-calling and SM.  (In the
  silent mode the indicator light and backlight will flash.)
- - A vibrating accessory is planned for release on the US market during 1Q96.
- - Audible tones indicate keystroke confirmation and error alerts.

1.6.  VOLUME CONTROLS
- - The 337 utilizes two keys to control earpiece volume.
- - Ringing tone volume controls and silent ringing are provided as a menu
  functions.
- - Confidence tones can be turned off while alarm tones will always be
  supported.
- - The 337 stores separate settings for loudspeaker and microphone volume
  control for use with a handset and with the car kit.







                                      -3-
<PAGE>
 
1.7.  BASIC MMI
- - The 337 uses a unique patent pending user interface.  This user friendly
  interface is the result o of extensive market research with a broad range of
  prospective users.  Most of the 337 features are accessible through a multi-
  level menu system.  The 36 character display shows the user what menu they are
  accessing and setting options.
- - Ericsson's MMI is designed to fulfill the needs of experienced cellular users
  as well as novice users, that is the MMI is designed to be both easy to use
  for quick interactions from a experienced user as well as intuitive for an
  inexperienced user. (See items 21 and 23.)
- - Most GSM based features are supported by the SIM card. In most cases these
  features can be activated and deactivated, that is hidden or shown, by
  settings on the SIM card. Ericsson's objective with the user interface is to
  remove unnecessary and unused features in order to reduce the complexity for
  the end user.
- - English, French, and Spanish language menus are currently supported.
  Language setting is supported by the menu system

1.8.  GREETING MESSAGE
- - A greeting message will be displayed on switch-on. This message is generally
  stored in the handset and editable by the user. Also, other features, such as
  Network Greeting (CPHS feature) have been supported for DCS vendors, where the
  handset will read and display the greeting from the SIM. This SIM based
  greeting can be presented as an editable or un-editable greeting and it can
  also be updated over the air via SMS class 2. Note that Network Greeting may
  require unique software and may therefore be volume dependent.  Please also
  note that Network Greeting may become standardized for PCS 1900 and Ericsson
  then intends to support it as basic functionality.

1.9.  PIN MANAGEMENT
- - The 337 utilizes several PINs; one that locks the SIM and an additional
  "Security Code" that can be used to lock the phone.  PINs are also required to
  activate or change features like Call Barring.
- - The 337 user has the ability to turn PINs on and off as well as change PINs.
  Note the SIM card may be programmed to block the user from changing the SIM's
  PIN code.








                                      -4-
<PAGE>
 
1.10.  NETWORK SELECTION
- - When the 337 locates an available network, the  identity of the host network
  is displayed.
- - The home network will always be sought first.
- - Within the home network coverage area, the availability of other networks
  will not show on handset display.  However, if the user initiates a search for
  alternate networks the phone will show all networks found.  These networks may
  be classified as Home, Preferred, Ordinary, or Forbidden.
- - When roaming, the handset will display the Preferred PLMN as defined by the
  SIM card if a network on the Preferred PLMN List can be found. If no Preferred
  PLMN can be found, the handset will display any other, non forbidden, network
  it can find. Again, if the user initiates a search, the phone will show all
  the available networks as well as the classifications as defined by the SIM
  (Preferred, Ordinary, or Forbidden

1.11.  SERVICE AND SIGNAL QUALITY INDICATORS
- - The display indicates when the MS is in the signal coverage area and in the
  idle updated state by displaying the network identifier.
- - Signal strength indicators cover the signal range in a manner that provides a
  useful indication to the user.

1.12.  DIALING SEQUENCE
- - Digits on the display are dialed when the "Yes" button is pressed. Digits can
  be brought to the display by several methods: manually entering the number,
  recalling a number from stored memory, recalling a number from a Short
  Message, recalling a number from the last number dialed stack or missed call
  stack, and from the scratchpad (entered during the last call). The only
  exception is when single digits from 1 - 9 are on the display and "Yes" is
  pressed, the number stored in corresponding memory location is dialed.

1.13.  EMERGENCY CALLS
- - 911 calls can be made without a SIM and without a PIN.
- - Emergency calls are not prevented by SIM locking where another provider's SIM
  is inserted in the phone.

1.14.  OUTGOING CALLER ID
- - The 337 supports per-call CLID blocking and unblocking by supporting *67 and
  *82 dialing, that is the "star-codes" will be sent to the network as a b-party
  number, just as for any POT in a wireline network.  In addition, the 337
  supports the GSM based features of CLI-P and CLI-R, both with menu interface
  and the GSM */# base user interface.

1.15.  DTMF TONE SIGNALING
- - Currently the 337 gives the user the option of turning DTMF tone signaling
  on or off.


                                      -5-

<PAGE>
 
1.16.  ANSWERING CALLS
- - The backlighting and status indicator flash to indicate ringing in all cases
  (i.e. both with audible and silent ringing).
- - Any key answer is supported only when the handset is used with a handsfree
  (portable or vehicle) kit.
- - Caller ID or "call in progress" is displayed on screen when a call is
  received.
- - If the CLID matches a number stored in the SIM directory the 337 shows the
  caller's name and number.

1.17.  USER MSISDN
- - MSISDN can be stored by the operator on the SIM over the air (via SMS class
  2) and will not be editable by the user, if this is specified in the SIM. If
  the SIM card supports it, it is possible to change or enter a new number via
  the keypad.

1.18.  TOTAL CALL TIME
- - Call duration (from connection) is displayed while the call is in progress and
  remains on the display for a short time after the call is completed. Total and
  last call time can be checked by accessing the menu system.

1.19.  USE OF STORED DIRECTORIES
- - Due to a general lack of memory on the SIM cards, the 337 will store speed-
  dial information both on the SIM and in the phone (planned phone book size is
  100 entries).
- - When received, short messages are first stored in the phone. When the user
  reads the message he/she has the option of deleting the message or saving it
  on the SIM.
- - The supplementary service, fixed dialing, is scheduled to be available in the
  388 product platform.
- - Memory locations 1 to 9 can be dialed by simply entering the single digit and
  pressing the "Yes" button. (All other memory locations can be recalled to the
  display and dialed by pressing 'Yes').
- - Speed dial numbers can be recalled to the display by entering the first one
  or two letters of the name, as appropriate.  Entries can then be scrolled in
  alphabetical order.
- - Any number entered or recalled to the display can be stored in the directory
  (the handset prompts the user to enter the name and automatically suggests the
  next available memory location.)
- - The last 10 dialed numbers and last 10 missed calls are automatically stored
  and available for redialing or permanent storage. Also, it is very simple for
  the user to dial the last called or the last received number (assuming CLI was
  presented) if for any reason the call is interrupted or disconnected.
- - The scratchpad features allows the user to enter a number into the handset
  during a call for subsequent storage or dialing.

                                      -6-
<PAGE>
 
1.20.  ADVICE OF CHARGE
- - Advice of charge information is supported and AoC Charging is planned to be
  supported during 1996.

1.21.  CALL BARRING AND DIVERSION
- - The 337 supports both GSM SS call barring and call diversion through a
  standard menu interface as well as the GSM */# codes.(Barring and divert menus
  can be suppressed via the SIM, using the customer service profile).
- - As specified by the GSM standard, */#-codes are supported. Additional North
  American wireline commands are supported as B-party numbers as long as they
  are supported by the wireless switch and more than 2 characters.
- - Call diversion is supported for all conditions; unconditional, busy, off, and
  no reply.

1.22.  CALL WAITING/HOLD
- - The handset supports call waiting and hold.  Typically:
     -  user will hear alert tone and display will indicate a second call (with
        CLI, if applicable)
     -  user will press 'Yes' to answer second call and 'Yes' to toggle between
        callers
     -  display indicates which caller is live and which is on hold.
- - While a call is in progress, the user is able to put caller on hold and place
  a second outgoing call using the 'Yes' key to toggle between the two parties.
  The first call can be put on hold by pressing the 'Yes' key (if the display is
  clear of numbers), dialing the number and pressing the 'Yes' key to place the
  call.  Alternatively, the user could enter the number while on the first call,
  press 'Yes' to put the first call on hold and place the second call.

1.23.  CONFERENCE CALLING
- - Ericsson plans to support conference calling and call transfer by no later
  than the introduction of the 388 platform.

1.24.  SMS MESSAGE SERVICE
- - Fax and Data are currently supported on all models.
- - When an SMS message arrives the phone beeps twice to alert the user and an
  'envelope' icon is displayed.  The SMS audible alert can be turned of
  completely if the user so desires.
- - When the user receives a message two short beeps are heard and the display
  shows "Message, Read?".  Pressing "YES" displays the first message.  The user
  can then erase the message or store it on the SIM.
- - If a phone number is embedded in the SMS message, the user can dial the
  number directly by pressing the 'Yes' key.
- - Currently the phone number imbedded in the SMS message must be dialed before
  it can be saved in the phone book memory.
- - SMS-MO is supported.

                                      -7-
<PAGE>
 
1.25.  VOICE MAIL ALERT
- - The phone supports SMS voice message notification as specified in the CPHS.
  When voice mail is received, the phone emits two short beeps and the indicator
  lamp on top of the phone flashes rapidly.  A tape recorder icon is also
  displayed on the LCD.
- - If the phone number to voice mail is stored on the SIM the LCD will display
  "Voice mail, Check?".  Pressing the "Yes" key automatically connects the user
  to the voice mail system.

1.26.  SMS SIM CARD AND HANDSET UPDATE
- - Ericsson currently supports and will continue to support SMS Class 2, SIM
  specific messages. This standard is currently used in North America and Europe
  for over-the-air programming of SIM cards. When a Class 2 SMS is received it
  will not trigger the SMS notification in the phone, i.e. the user will not be
  notified that an SMS has been received. Faults or failures will cause specific
  error messages to be returned, according to the GSM specification.

1.27.  CELL BROADCASTS
- - Certain types or all cell broadcast messages can be rejected via a menu
  function.

1.28.  HOME ZONES
- - The feature Home Zone is currently not supported by the basic Ericsson
  software since there is no standardized feature for the US market (J-STD-007).
  Ericsson plans to support standards regarding Home Zone when these are
  approved. Ericsson may however be willing to customize software to support
  Home Zone before standards are set, this is however volume pending.

1.29.  CAR KIT AND OTHER ACCESSORIES
- - Vehicle handsfree install kits and a portable handsfree kits (earpiece and
  microphone) are available for all phones (note that these kits do not
  typically include the external (car) antenna.
- - Competent users may install car kits; however, Ericsson typically recommends
  professional installations.
- - All volume control for the car kit is done through the handset.  Separate
  control settings are stored for handset and car kit operation.
- - A range of slim, regular and high capacity batteries, mains powered and
  vehicle battery powered rapid chargers, PCMCIA modem cards with cables,
  carrying cases, clips etc. are available.

1.30.  TIME
- - The 337 includes a built in clock which displays the time in 24-hour or AM/PM
  format

                                      -8-
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

1.31.  ABILITY TO ACCEPT ONLY SIMS FROM PARTICULAR OPERATOR, NETWORK OR RESELLER
- - Ericsson currently supports a SIM lock where the phone is locked to a
  specific network identity, that is the MCC and the MNC for a specific
  operator.
- - Handsets can be pre-locked on delivery from the manufacturer, with minimum
  volume commitments or the handsets can be locked by the operator or the user
  directly from the keypad (when a SIM with the network identity that the
  handset shall be locked to is inserted in the handset).
- - If an incorrect SIM is used, the handset will not allow calls, except for 911
  emergency calls.
- - The operator will be provided with a disk containing a list of unlock codes
  for each handset.
- - This specific code can be entered by the user or the operator to unlock the
  phone.
- - Ericsson plans to comply with the anticipated changes to SIM Lock standards
  for the North American market that the N-PAG are currently working with.

PCS 1900 SINGLE-MODE HANDSET SPECIFICATIONS - CF-337

The specifications for the CF-337 are the same as the CH-337 with the following
exceptions:

 . The front plastic design includes a flip cover over the keypad.

 . The addition of a separate power key.

The package includes:

                                       *

                                      -9-
<PAGE>
 
ATTACHMENT A-2 TO EXHIBIT 3

<PAGE>
 
Attachment A-2
Omnipoint Communications Inc./Ericsson Inc.

                    CH388/CF388 (EFR) HANDSET SPECIFICATIONS

                          (To be provided by Ericsson)







                                      -1-
<PAGE>
 
                                                     ATTACHMENT A-3 TO EXHIBIT 3
 
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

Attachment A-3
Omnipoint Communications Inc./Ericsson Inc.

              PCS 1900 SINGLE-MODE HANDSET SPECIFICATIONS - CA-318

The specifications for the CA-318s are the same as the CH-337 with the following
exceptions:

 . Dual Full Rate and Enhanced Full Rate Vocoders
 . Enhanced Display
 . 9.6 Kbps data rate

The package includes:

                                       *

                                      -1-
<PAGE>
 
                                                       ATTACHMENT B TO EXHIBIT 3
<PAGE>
 
Attachment B
Omnipoint Communications Inc./Ericsson Inc.

                       Forecasting and Ordering Processes

             (To be developed when needed pursuant to Section 9.10)












                                      -1-
<PAGE>
 
                                                       ATTACHMENT C TO EXHIBIT 3
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

Attachment C
Omnipoint Communications Inc./Ericsson Inc.

                      Dates for Completion of Attachments


Attachment                             Completion Date
- ----------                             ---------------
A-2                                           *
A-3                                           * 
B                                             *
C                                             *
D                                             *
E                                             *
F                                             *
G                                             *
H                                             *
I                                             *
J                                             *
K                                             *

                                      -1-
<PAGE>
 
ATTACHMENT D TO EXHIBIT 3






















<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

Attachment D
Omnipoint Communications Inc./Ericsson Inc.

                                       *

                                      -1-
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

                                       *

                                      -2-
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

                                       *

                                      -3-
<PAGE>
 
ATTACHMENT E TO EXHIBIT 3
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

Attachment E
Omnipoint Communications Inc./Ericsson Inc.

                            SAMPLE TESTING PROTOCOL

                                       *

                                      -1-
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

                                       *

                                      -2-
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

                                       *

                                      -3-
<PAGE>
 
ATTACHMENT F TO EXHIBIT 3


<PAGE>
 
Attachment F
Omnipoint Communications Inc./Ericsson Inc.

                                   (Reserved)











                                      -1-
<PAGE>
 
ATTACHMENT G TO EXHIBIT 3



<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

Attachment G
Omnipoint Communications Inc./Ericsson Inc.

                                       *

                                      -1-
<PAGE>
 
                                                       ATTACHMENT H TO EXHIBIT 3















<PAGE>
 
Attachment H
Omnipoint Communications Inc./Ericsson Inc.

                               End-User Warranty


                              WARRANTY CONDITIONS

Dear Customer,

Should your Ericsson PCS Phone need warranty service, you should send the
Product to any Company Authorized Service facility.  For information, either
contact the store from which you purchased the Product, or call 1-800-227-3663
(U.S. only) or 804-845-3663.  The Product in all cases must be accompanied by
the following items:  Your name, address, telephone number, bill of sales
bearing the serial number, date of delivery, or reasonable proof of these dates,
and a detailed description of the problem.

Our Warranty

This warranty is extended by Ericsson, Inc. ("the Company") to the original
purchaser for use only.  Ericsson warrants this product to be free of defects in
material and workmanship at the time of its original purchase and for the
subsequent period of one (1) year.

All accessories excluding batteries for the Product are covered for a period of
one (1) year from the date of purchase.  Batteries for handheld units are
covered for a period of ninety (90) days from the date of purchase.

What we will do

If, during the period of Warranty, this product proves defective under normal
use and service due to improper materials or workmanship, the Company will
repair or replace the defective item with a new or factory rebuild replacement.

Conditions

1. In the event the Company repairs or replaces the Product, the repaired or
   replaced Product shall be warranted under the limited warranty for the
   remainder of the warranty period of the warranted cellular telephone or for
   ninety (90) days, whichever is longer.  Repair may include the replacement of
   parts or components with functionally equivalent reconditioned parts or
   components.

2. This warranty does not cover any failure of equipment not supplied by the
   Company, nor does it cover failure of the Product due to misuse (including
   use in other than the normal and 


                                      -1-
<PAGE>
 
   customary manner, neglect, accident, improper installation, repair,
   alteration, modification or adjustment). Since the cellular system on which
   the Product is to operate is provided by a carrier independent from the
   Company, we will not be responsible for the operation, availability coverage,
   services or range of that system.

3. Company Product, equipment or parts are often sold, installed and serviced by
   independent contractors (service stations) and not by the Company, therefore,
   the Company does not warranty in any way the installation, modifications,
   maintenance, or service performed by non-Company authorized service stations,
   nor does the Company warranty any other equipment subsequently attached
   thereto or modifications of normal installation whether done by the service
   station or anyone else.

4. THERE ARE NO OTHER EXPRESS WARRANTIES, WHETHER WRITTEN OR ORAL, OTHER THAN
   THIS PRINTED LIMITED WARRANTY.  ALL IMPLIED WARRANTIES, INCLUDING WITHOUT
   LIMITATION THE IMPLIED WARRANTIES OR MERCHANTABILITY OR FITNESS FOR A
   PARTICULAR PURPOSE, ARE LIMITED TO THE DURATION OF THIS LIMITED WARRANTY.  IN
   NO EVENT SHALL THE COMPANY BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES
   OF ANY NATURE WHATSOEVER, INCLUDING BUT NOT LIMITED TO LOST PROFITS OR
   COMMERCIAL LOSS, TO THE FULL EXTENT THOSE DAMAGES CAN BE DISCLAIMED BY LAW.

     Some states do not allow the exclusion or limitation of incidental or
     consequential damage, or limitation of the duration of implied warranties,
     so the preceding limitations or exclusions may not apply to you. This
     warranty gives you specific legal rights, and you may also have other
     rights which may vary from state to state.


                                      -2-
<PAGE>
 
                                                       ATTACHMENT I TO EXHIBIT 3












<PAGE>
 
Attachment I
Omnipoint Communications Inc./Ericsson Inc.

                                Database Format

                       (To be supplied by Ericsson Inc.)









                                      -1-
<PAGE>
 
                                                       ATTACHMENT J TO EXHIBIT 3
<PAGE>
 
Attachment J
Omnipoint Communications Inc./Ericsson Inc.

                          ADVERTISING DISPLAY MATERIAL

                       (To be supplied by Ericsson Inc.)






                                      -1-
<PAGE>
 
                                                       ATTACHMENT K TO EXHIBIT 3
<PAGE>
 
Attachment K
Omnipoint Communications Inc./Ericsson Inc.

                                 RETURN POLICY


Recognizing that product sold to our customers is done so in good faith, the
return of stock is considered contrary to the original purchase terms.  However,
at your request, Ericsson Cellular Phones will consider the return of customer's
inventory under certain market conditions.  Ericsson will only consider credit
returns if our customer has demonstrated active promotion and proper positioning
of our product.

This agreement is necessitated by the cost prohibitive nature of stock returns
and covers the blanket guidelines for processing a return.  As a partner with
Ericsson interested in growing our relationship and respective businesses,
customers are asked to share the cost of this burden.

Note that each request for return must be specifically agreed to by the Ericsson
customer representative and Ericsson management.  To obtain approval for a
specific restock return for credit, a customer signed agreement in accordance
with the following return guidelines is required:

 . The product must be in current production and direct purchased by customer
  within the last 90 days.  If product is determined to been purchased from
  other suppliers, product will be returned to customer.

 . The product must be in new, immediate resoluble condition including original
  packaging and master cartons.

 . Credit will be applied at the current customer wholesale (market) price less a
  10% restocking charge to cover basic handling and restocking.

 . A return authorization will be provided by your sales representative.  It will
  be valid for 30 days from issuance.

 . Stock is to be returned to the Ericsson Product Return Center, Industrial
  Drive, Richardson, TX.

 . No custom products are returnable under this policy.

Credit will be provided to customer's account within thirty (30) days.

                                      -1-

<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                          SEPARATELY WITH THE COMMISSION

                                                                       Exhibit 4
1.   Memorandum of Understanding
     ---------------------------

     This Memorandum of Understanding (MOU) is made and entered on the 2nd day
     of April, 1996 between

     OMNIPOINT CORPORATION, a Delaware corporation having its principal place of
     business at 1365 Garden of the Gods Road, Colorado Springs, CO 80907, on
     behalf of itself and its subsidiaries and affiliates (collectively,
     "Omnipoint")

     Orbitel Mobile Communications Ltd which is a manufacturer and supplier of
     amongst other things GSM related mobile phones and equipment whose
     principle place of business is The Keytech Centre, Ashwood Way,
     Basingstoke, Hampshire RG23 8BG, England ("Orbitel")

     Sets out the basis upon which "Orbitel" will in general co-operate with
     "Omnipoint" to enable the generation of a mutually beneficial Commercial
     Agreement for the design, development, manufacture and sale of handportable
     terminal equipment incorporating the IS 661 standard.



2.   Duration
     --------

     This MOU, one signed by both parties shall remain in full force and effect
     until such time as the parties enter into commercial agreement.
     Notwithstanding paragraph 6, if the requirements under paragraph 3.1 for
     proceeding to commercial agreement have not been met by 14th June 1996,
     this MOU will lapse.


3.   Principles of co-operation in the generation and execution of a Commercial
     --------------------------------------------------------------------------
     Agreement
     ---------

     1. Both parties agree that they will use their reasonable efforts to
        finalize a Commercial Agreement as soon as is reasonably possible which
        will set out the terms and conditions under which the undertakings
        expressed in this MOU will be carried out as are judged at this time.

     2. Orbitel should undertake a feasibility study to establish the
        appropriate level of chipset and product integration that can take
        place, with respect to time, in meeting the commercial needs of the
        market place for duel mode IS 661 / PCS 1900 handportable terminals
        within North America.

     3. Orbitel and Omnipoint shall together undertake a feasibility study to
        establish what time scales are technically feasible and commercially
        appropriate for the market place with an initial view that dual mode IS
        661 products should be targeted to be available *      and single mode
        IS 661 products.      The actual commercial product availability dates
        agreed by both parties will be based upon the results of the Feasibility
        Study. These dates will be specified in the subsequent Commercial
        Agreement.

     4. In consideration of a single License fee (to be secured by separate
        agreement between Orbitel, Ericsson and Omnipoint) Omnipoint shall grant
        to Orbitel, a license to design, develop, manufacture and sell IS 661
        based handportable terminals and a license to purchase from 
        Omnipoint *              certain ASICs containing Omnipoint Technology.
        Orbitel and Omnipoint agree

                                      -1-
<PAGE>
 
                          *CONFIDENTIAL INFORMATION;
                          HAS BEEN OMITTED AND FILED
                        SEPARATELY WITH THE COMMISSION


     5.  Orbitel shall undertake a primary role in the following areas:

         a) Investigation, definition and productionization in agreement with
         Omnipoint of a preferred solution for a single mode IS 661 chipset.
         Specific responsibilities for these activities to be mutually agreed by
         Orbitel/Omnipoint.

         b) Investigation and development with Omnipoint to combine Omnipoint's
         IS 661 technology with an Orbitel developed or acquired PCS 1900
         technology to produce a "partially integrated" dual mode chipset
         solution.

         c) Development with Omnipoint of a new "fully integrated" dual mode
         solution by working with some of the current chipset suppliers of
         Orbitel, Ericsson and Omnipoint, as well as other chipset suppliers
         that can provide innovative solutions.

     6.  Orbitel shall undertake the design, development, manufacture and sale
         of IS 661 based handportable terminals, which will include a dual mode
         IS 661 / PCS 1900 handportable phone. Such terminals should include
         facilities for data and fax capabilities to an agreed specification and
         ancillary equipment such as chargers, as well as difference battery
         types.

     7.  Dual mode IS 661 /PCS 1900 handportable phones supplied by Orbitel
         shall at least meet a specification to be agreed between Omnipoint and
         Orbitel. The intent of this specification will be products re are
         judged to be market competitive with respect to price, size, weigh,
         function when compared against other dual mode phones that have a
         similar complexity, similar volume and available within a similar time
         frame.

     8.  Orbitel shall use its knowledge to introduce and attempt to represent
         the use of IS 661 as a standard within the European Telecommunications
         Standards Institute, "ERSI" and other mutually agreed standards bodies,
         with the assistance of Omnipoint.

     9.  Orbitel shall endeavour to promote the acceptance of IS 661 based
         systems outside of the U.S.

     10. Orbitel should endeavour to identify and appoint an independent sales
         and distribution partner with North America for the IS 661 based
         handportable terminals and shall contribute to an agreed level towards
         promotional activities. Omnipoint will offer reasonable assistance in
         the introduction and support of potential partners in North America.

     11.  *

     12. Orbitel shall work with Omnipoint in the optimization of IS 661 and/or
         the products/systems for new applications (e.g. RLL, Low tier, Home
         BTS).

     13. Orbitel will further investigate with Omnipoint the opportunities for
         the supply of Data Services, including the provision of OEM agreements,
         Data Terminal Adaptors and associated support software.

     14. Orbitel wishes to undertake an investigation into other applications
         for the IS 661 technology including wireless data and wireless in the
         local loop with the intent of achieving a product and technology route
         map over time for both terminal and infrastructure equipment, which may
         require Orbitel to agree to an additional license for further use of
         Omnipoint's technology.

     15. Orbitel shall make the IS 661 mobile terminals available on an OEM
         basis, subject to suitable, commercial arrangements.

                                    Page 2
<PAGE>
 
     16. Chose of ASIC vendors to be made jointly by mutual agreement - such
         agreement not to be unreasonably withheld by either party.


     4. Documentation
        -------------

     It is expected that this relationship will be embodied in four agreements:

     1. A Supply Agreement pursuant to which Orbitel will sell mobile terminals
     to Omnipoint Communications, Inc.

     2.1. A Statement of work defining the scope of the project(s) and the roles
     and responsibilities of both parties.

     2.2. If deemed necessary by both parties, a Collaborative Development
     Agreement, pursuant to which Omnipoint and Orbitel will pursue the
     development projects set forth therein; such Agreement to govern the
     rights to joint inventions, if any.

     3. An ASIC Supply Agreement pursuant to which Omnipoint will sell ASIC
     stock Orbitel to incorporate in mobile terminals if and as required.

     4. A Dual Mode Chipset License and/or OEM Agreement pursuant to which
     Orbitel will have manufactured and shall sell dual mode chipsets to
     Omnipoint or license Omnipoint to make such dual mode chipsets or
     provide for Omnipoint to purchase chipsets directly from chipset
     supplier.


     5. Confidentiality
        ---------------

     (a)  Prior to this MOU and hereafter, it has been and will continue to be
          necessary for the parties to exchange certain information, data and
          material of a proprietary or confidential nature whether relating to
          technical, financial or commercial information ("Confidential
          Information). All Confidential Information will be received and
          retained in the strictest confidence by the recipient, and will not be
          disclosed to third parties without the written consent of the
          disclosing party and the use thereof will be solely for the purpose
          for which it was provided. Each party including its employees, sub-
          contractors and other personnel acting under the control of a party,
          receiving Confidential Information will treat each item of the
          Confidential Information as confidential during a period of 5 years
          from the date of receipt.

          This confidentiality is also reflected in the mutual non-disclosure
          agreement already signed between Omnipoint and Orbitel on 20th day
          July 1995.

     (b)  No release of information relating to this MOU or matters hereto will
          be made to the media or any third party without the agreement of both
          parties.


     6. Binding Obligations
        -------------------

     Neither party will have any obligation or liability to the other arising
     from this MOU with the exception of their confidentiality obligations
     contained in Paragraph 5 hereof.


/s/ R.N.                               /s/ George F. Schmitt
- -----------------------------          ---------------------------
Signed for and on behalf of            Signed for and on behalf of
Orbitel Mobile Communications          Omnipoint Corporation

                                    Page 3


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