<PAGE>
 
                                                                   EXHIBIT 10.47


 Confidential Materials omitted and filed separately with the Securities and 
               Exchange Commission. Asterisks denote omissions.

                                   AGREEMENT
                                   ---------


    AGREEMENT made this 16th day of November, 1998, by and between Cellular
Express, Inc., a Massachusetts corporation d/b/a Boston Communications Group
(the "Company"), having offices at 100 Sylvan Road, Woburn, MA 01801 and AG
Communications Systems, a corporation having offices at 2500 W. Utopia Road,
Phoenix, AZ 85072 ("AGCS").

    1.  Engagement.  The Company hereby engages AGCS as an independent
        ----------                                                    
contractor to perform the services described in Attachment 1 to this Agreement,
and AGCS hereby agrees to such engagement.

    2.  Performance.  AGCS agrees to perform at all times faithfully,
        -----------                                                  
industriously, and to the best of AGCS's ability, experience, and talents, the
duties that may be required of AGCS pursuant to the terms hereof.

    3.  Compensation.  The Company shall pay AGCS, and AGCS shall accept from
        ------------                                                         
the Company, in full payment for AGCS's services hereunder, compensation as
provided in Attachment 1 to this Agreement.

    4.  Confidentiality.  AGCS shall not at any time whatsoever, or in any
        ---------------                                                   
manner, either directly or indirectly, divulge, disclose or communicate to any
person, firm or corporation in any manner whatsoever any confidential
information of the Company, including specifications, technical and business
plans, drawings, system design, software, data, documentation, methods of
operation, processes, customer information or any other information which is
identified by the Company as confidential at the time of its disclosure to AGCS,
without the prior written consent of the Company, the parties hereto stipulating
that as between them, the same are important, material, and confidential and
gravely affect the effective and successful conduct of the business of the
Company and its good will.

    5.  Rights in Roaming Solution.  AGCS hereby agrees that the software
        --------------------------                                       
developed by AGCS in accordance with Company's proprietary specifications for
Company's Roaming Solution, and the software developed by AGCS in accordance
with Company's proprietary specifications for [**] WPS functionality not covered
by the [**], WIN,[**] and [**] industry standards, are works for hire and all
rights in and to such developments shall belong to the Company in perpetuity,
and that AGCS shall not disclose any of such developments to any third party
without the prior written consent of the Company.  AGCS agrees to cooperate with
the Company and to execute such documents as the Company may reasonably require
to effect or enforce its rights in such developments.  It is understood that
those portions of the [**] WPS solution that are covered by the [**], WIN,[**]
and [**] standards are not "works for hire" and are not subject to the
provisions of this Section 5.

    6.  Indemnification.  Each party shall indemnify, defend and hold the other
        ---------------                                                        
party harmless from any losses, damages, liabilities, claims, costs and expenses
(including reasonable attorneys' fees) on account of any damage to property and
personal injuries, including death, occurring during the performance of this
Agreement, to any person or persons, arising from any act or omission of the
indemnifying party related to the performance of this Agreement or the services
provided hereunder.
<PAGE>
 
    7.  Independent Covenants.  The covenants on the part of AGCS in Sections 5,
        ---------------------                                                   
6 and 7 shall survive the termination of this Agreement for a period of two
years and shall be construed as agreements independent of any other provision
contained in this Agreement and the effect of any claim or action by AGCS
against the Company whether predicated on this Agreement or otherwise shall not
constitute a defense to the enforcement by the Company of these covenants.

    8.  Warranties.
        ---------- 

    (a)  AGCS represents and warrants that AGCS's execution and performance of
this Agreement does not and will not conflict with any other Agreement to which
AGCS is a party or by which AGCS is bound.

    (b)  AGCS warrants that each product provided to the Company by AGCS
pursuant to this Agreement will perform in accordance with the functional
specifications for such product for a period of twelve (12) months following
acceptance of such product by the Company.

    (c)  AGCS represents and warrants that all deliverables provided by AGCS to
the Company will not infringe any United States patent or copyright of any third
party. AGCS will defend all actions, claims, and suits against the Company
alleging that any of the software or other deliverables furnished hereunder
infringes any United States patent or copyright, and will pay all damages and
costs which by final judgment may be assessed against the Company on account of
such infringement, provided that AGCS (i) shall have received written notice of
any claim of such infringement or suit and full opportunity and authority to
assume the sole defense of and to settle such suit, and (ii) shall be furnished,
upon AGCS's request and at AGCS's expense, such information and assistance as
AGCS may reasonably request from the Company relating to such defense.  If the
use of such software or other deliverable in any such suit is held to constitute
infringement and the use of said software or deliverable is enjoined, AGCS will
either procure for the Company the right to continue using said software or
deliverable or replace it with a non-infringing product or modify it so that it
becomes non-infringing.  No undertaking of AGCS under this Section shall extend
to any such alleged infringement or violation to the extent it is caused by
adherence to design specifications, modifications, drawings or other written
instructions which AGCS is directed by Company to follow, provided that, in
adhering to such specifications or instructions, AGCS does not knowingly
infringe on the patent or copyright of a third party.

    (d)  AGCS represents, warrants and covenants that: (i) all products and
services delivered under this contract, including embedded third party software
or hardware, shall be able to accurately process date data including, but not
limited to, calculating, comparing, and sequencing from, into, and between the
twentieth and twenty-first centuries, including leap year calculations, provided
that all products and services used in combination with such products and
services properly exchange date data with it; (ii) AGCS's products and services
are and will be fully capable of operating as required to accommodate the year
2000 and beyond; (iii) any modifications to AGCS's products and services made to
accommodate year 2000 processing will not adversely affect any existing
function, feature, architectural design or current working processes with regard
to AGCS's product and AGCS's knowledge of BCG's use; and (iv) AGCS will provide
the support and maintenance, at no cost to BCG, to ensure that any new releases
of the products or services delivered hereunder have year 2000 capability.
<PAGE>
 
    (e)  The provisions of this Section 9 shall survive the termination of this
Agreement.

    9.   Enforcement.  The parties acknowledge the uniqueness of AGCS's services
         -----------                                                            
to the Company, and agree that any violation or breach by AGCS of the covenants
contained in Sections 5 or 6 above shall entitle the Company to injunctive
relief or other equitable relief in any court of competent jurisdiction.

    10.  Notice.  Any notice required under this Agreement shall be in writing
         ------                                                               
and personally delivered or sent by registered or certified mail to the
addresses of the parties set forth on page 1 of this Agreement, or to such other
address as the parties hereto may designate in writing to each other.

    11.  Authority.  Notwithstanding anything herein contained to the contrary,
         ---------                                                             
AGCS shall not have the right to make any contracts or commitments for or on
behalf of the Company without obtaining the prior written consent of the
Company.

    12.  Entire Agreement.  This contract contains the complete agreement
         ----------------                                                
between the parties and shall, as of the effective date hereof, supersede all
other agreements written or oral between the parties concerning the subject
matter hereof. The parties stipulate that neither of them has made any
representation with respect to the subject matter of this agreement or any
representations including the execution and delivery hereof except such
representations as are specifically set forth herein and each of the parties
hereto acknowledges that such party has relied on his, her or its own judgment
in entering into this agreement.

    13.  Modifications.  No waiver or modification of this agreement or of any
         -------------                                                        
covenant, condition, or limitation herein contained shall be valid unless in
writing and duly executed by the party to be charged therewith and no evidence
of any waiver or modification shall be offered or received in evidence of any
proceeding, arbitration, or litigation between the parties hereto arising out of
or affecting this agreement, or the rights or obligations of the parties
hereunder, unless such waiver or modification is in writing, duly executed as
aforesaid, and the parties further agree that the provisions of this paragraph
may not be waived except as herein set forth.

    14.  Termination.  This agreement may be terminated by the Company, at its
         -----------                                                          
sole discretion, at any time prior to the delivery of the completed product by
AGCS to the Company, on fifteen (15) days prior written notice to AGCS.  Upon
termination by the Company for any reason except default by AGCS, AGCS shall not
have any further rights against the Company under this agreement except that
AGCS shall be paid AGCS's compensation on a pro-rata basis through the date of
termination.

    If AGCS shall fail to deliver a product which conforms to the functional
specifications for such product by the agreed upon delivery date, or if at any
time during the term of this Agreement AGCS shall neglect or fail to perform or
observe any material provision of this Agreement and shall fail to remedy the
same within thirty (30) days after notice from the Company, then the Company
may, at any time thereafter, terminate this Agreement by notice to AGCS, and in
addition to any other remedies which the Company may have, at law or in equity,
the Company may return such product to AGCS and shall be entitled to a full
refund of all amounts previously paid by the Company for such product.
<PAGE>
 
    If at any time during the term of this Agreement a party shall make an
assignment for the benefit of creditors; or a party shall file a voluntary
petition in bankruptcy or shall be adjudicated bankrupt or insolvent, or shall
file any petition or answer seeking any reorganization, arrangement,
composition, readjustment, liquidation, dissolution or similar relief for itself
under any present or future Federal, State or other statute, law or regulation
for the relief of debtors, or shall seek or consent to acquiesce in the
appointment of any trustee, receiver or liquidator of such party or of all or
any substantial part of its properties, or shall admit in writing its inability
to pay its debts generally as they become due; or a petition shall be filed
against a party in bankruptcy or under any other law seeking any reorganization,
arrangement, composition, readjustment, liquidation, dissolution, or similar
relief under any present or future Federal, State, or other statute, law or
regulation of similar import and shall remain undismissed or unstayed for an
aggregate of ninety (90) days (whether or not consecutive), or if any debtor in
possession, trustee, receiver or liquidator of a party or of all or any
substantial part of its properties shall be appointed without the consent or
acquiescence of said party and such appointment shall remain unvacated or
unstayed for an aggregate of ninety (90) days (whether or not consecutive);
then, in any such case, the other party may, at any time thereafter, terminate
this Agreement by notice to the defaulting party, specifying a date not less
than fifteen (15) days after the giving of such notice on which this Agreement
shall terminate; and in such event each party shall remain liable for amounts
due to the other party prior to the date of such termination.

    15.  Return of Materials.  Upon termination of work as an independent
         -------------------                                             
contractor to the Company, AGCS shall immediately return to the Company any and
all documents, materials, equipment and other property of the Company in AGCS's
possession or control, including without limitation any and all data and work
product prepared pursuant to this Agreement, summaries, abstracts, descriptions
and notes made by or for AGCS.

    16.  Governing Law.  It is the intention of the parties hereto that this
         -------------                                                      
agreement and the performance hereunder and all suits and special proceedings
hereunder be construed in accordance with and under and pursuant to the laws of
the Commonwealth of Massachusetts, and that in any action, special proceeding or
other proceeding that may be brought arising out of, in connection with, or by
reason of this agreement, the laws of the Commonwealth of Massachusetts shall be
applicable and shall govern to the exclusion of the law of any other forum,
without regard to the jurisdiction in which any action or special proceeding may
be instituted.

    17.  Construction.  Nothing in this agreement shall be deemed to create any
         ------------                                                          
relationship of principal and agent or any relationship between the parties
other than that of an independent contractor to the Company.

    18.  Assignment; Binding Effect.  This Agreement shall inure to the benefit
         --------------------------                                            
of the Company and its successors and shall not be assigned by AGCS.

    19.  Force Majeure.  Neither party shall be liable to the other for any
         -------------                                                     
delay or failure of any part of this Agreement from any cause beyond its control
and without its fault, including, without limitation, changes in government
regulations, embargoes, epidemic, war, terrorist acts, riots, insurrections,
fires, explosions, earthquakes, nuclear accidents, floods, strikes, power
blackouts, severe weather conditions, failure by the
<PAGE>
 
 Confidential Materials omitted and filed separately with the Securities and 
               Exchange Commission. Asterisks denote omissions.

other party to fulfill any of its obligations under this Agreement, or acts or
omissions of common carriers (collectively referred to as "Force Majeure
Conditions"); provided, however, that this shall not be deemed to apply to a
failure of AGCS to comply with the provisions of Section 8 hereof, nor to a
failure of the Company to make any payment due pursuant to the terms of
Attachment 1.

    20.  Acceptance
         ----------

    20.1 Prior to delivery of the commercial Roaming WPS Software solution and
         [**] WIN WPS Software solution to Company, AGCS shall perform the
         internal testing that is appropriate to provide reasonable assurance
         that each software solution will perform in conformance with their
         specifications. The Company acceptance test period shall commence on
         the date each software solution is received by Company. For the
         purposes of this Agreement, receipt shall be deemed to have occurred:
         (i) as evidenced by documentation signed by the Company, or (ii) the
         date a software solution is physically delivered to the Company by a
         representative of AGCS. The Company acceptance test period shall end
         forty-five (45) days after the start of the acceptance trial period.
         During the acceptance trial, Company may operate and test each software
         solution as it deems appropriate, including use of a software solution
         for commercial purposes. Company's use of a software solution for
         commercial purposes during the trial shall not constitute acceptance of
         a software solution.

    20.2 Company shall, prior to the end of an acceptance test period, notify
         AGCS whether a software solution performed in conformance with its
         specifications. Notification under this provision shall consist of: (i)
         a signed Certification of Acceptance attached hereto as Attachment 2
         for the software solution, or (ii) a written description of the
         material nonconformance items. Should Company fail to submit written
         notification within the time frame specified in this paragraph, the
         software solution shall be deemed accepted.

    20.3 If the Roaming WPS Software solution fails to perform in conformance
         with its specifications during the acceptance test period, AGCS shall
         extend the acceptance test period, as mutually agreed by both parties,
         and shall correct the material deficiencies. If AGCS is unable to
         correct material deficiencies by the date agreed to by both parties,
         Company shall be refunded the amount paid for the Roaming WPS Software
         solution.

    20.4 If the [**] WIN WPS Software solution fails to perform in conformance
         with its specifications during the acceptance test period, AGCS shall
         extend the acceptance test period, as mutually agreed by both parties,
         and shall correct the material deficiencies. If AGCS is unable to
         correct material deficiencies by the date agreed to by both parties,
         Company shall be refunded the amount paid for the [**] WIN WPS Software
         solution.
<PAGE>
 
 Confidential Materials omitted and filed separately with the Securities and 
               Exchange Commission. Asterisks denote omissions.
 
    20.5 If the [**] WIN WPS Software solution fails to perform in conformance
         with its specifications during the acceptance test period, AGCS shall
         extend the acceptance test period, as mutually agreed by both parties,
         and shall correct the material deficiencies. If AGCS is unable to
         correct material deficiencies by the date agreed to by both parties,
         Company shall be refunded the amount paid for the [**] WIN WPS Software
         solution.

    21.  Audit
         -----

    21.  Not more than twice a year AGCS may audit, or designate an independent
         certified auditor to audit the directly relevant records of Company
         during Company's regular business hours to determine whether the amount
         paid to AGCS by the Company is accurate. Any expenses of such audit
         shall be born by AGCS, unless the audit determines that the amount paid
         to AGCS by the Company is inaccurate by more than ten (10%) percent, in
         which case all reasonable expenses of the audit will be born by
         Company. The Company will be required to pay AGCS any amount owed. In
         the event that the audit determines that the Company has made an
         overpayment, AGCS shall pay the amount of such overpayment to the
         Company.

    21.2 Company agrees to report to AGCS within five (5) business days
         following the end of each quarter [**]. This report must be generated
         in accordance with the instructions as described in the User's Manual
         and forwarded to AGCS either electronically or via facsimile.

    21.3 It may be necessary to establish a data connection agreement between
         the parties to regulate the method and extent of the connection between
         the parties' computer networks. If such data connection is required, it
         shall be governed by a Data Connection Agreement, in the form attached
         as Attachment 3 hereto.

    21.4 Any reports shall be conclusively presumed as accurate after eighteen
         (18) months from date of delivery to AGCS by Company and shall be
         excluded from auditing.

    21.5 Any information derived from Company's reports or records shall be
         maintained in confidence by AGCS as Confidential Information of Company
         pursuant to Section 4 hereof.

    22.  Billing Terms  AGCS shall issue invoices using net thirty (30) day
         -------------                                                     
payment terms and shall bear interest at the rate of one percent (1.0%) per
month, or at the highest rate allowed by law, whichever is less, from the date
due until paid.

    23.  Maintenance  Regarding maintenance, as defined in Attachment 1, AGCS
         -----------                                                         
assumes TAC support will be provided and that maintenance will correct errors or
deficiencies in the operation and functioning of the application as required by
the specifications.  Maintenance does not include additional or enhanced
functionality or additional or enhanced features to the software, except that
provided for in Attachment 1.
<PAGE>
 
 Confidential Materials omitted and filed separately with the Securities and 
               Exchange Commission. Asterisks denote omissions.

    24.  WIN Industry Standard Support  The Company and AGCS agree to support
         -----------------------------                                       
one another in the [**] and WIN industry standards groups on matters affecting
the applications covered by this Agreement.

    25.  Specifications  The parties assume that the final specifications for
         --------------                                                      
[**] will be available to AGCS no later than [**].  If such final specifications
are not available by such date, AGCS will deliver the [**] WPS application [**]
from the availability to AGCS of such specifications.


    IN WITNESS WHEREOF, the parties hereunto set their hands and seals the day
and year first above written.

                                  CELLULAR EXPRESS, INC.



                                  By: /s/ Kevin M. Thigpen
                                     -----------------------------------
                                  Vice President & General Manager


                                  AG COMMUNICATIONS
                                  SYSTEMS



                                     /s/ Charles Schulz
                                  --------------------------------------
                                  Vice President & General Manager
<PAGE>
 
 Confidential Materials omitted and filed separately with the Securities and 
               Exchange Commission. Asterisks denote omissions.

                                 ATTACHMENT 1
                                 ------------
                                        
                      Scope of Services and Compensation
                     Between AG Communication Systems and
                          Boston Communications Group

1.  GENERAL

AG Communication Systems (AGCS) will develop and port the following Wireless
Prepaid Services (WPS) solutions for Boston Communications Group (BCGI): a
Roaming WPS solution based on BCGI's submitted technical specification [**] and
BCGI roaming functional specifications to be provided by BCGI; a Wireless
Intelligent Network (WIN) based [**] WPS solution based on [**], service
specifications with modifications/additions per BCGI functional specifications
and, a [**] WPS solution based on [**] WIN,[**], which is expected to be
standardized sometime in [**].

AGCS will develop a WIN based [**] WPS solution for delivery in [**] This
solution will interface with BCGI's rating engine and BCGI's IP as detailed in
the following BCGI documents: BCGI's WIN prepaid business requirements [**]; and
a WIN prepaid functional specification to be provided by BCGI. This solution
will initially be developed to run on [**] platforms identified by BCGI with a
[**] optional platform to be developed subsequently (see Platforms section
below). As part of this agreement, AGCS will migrate this solution to a [**] WIN
[**] solution when this standard becomes available.

AGCS will develop and port the roaming solution to BCGI specifications for
$1,730,000. This price includes BCGI exclusive license of the roaming solution.
Maintenance for this is included throughout [**].  The [**] WPS solution will be
paid as a business arrangement as follows: [**] of use on the AGCS [**] WPS BCGI
service bureau application (either on a BCGI owned SCP or carrier owned SCP)
from inception of service through [**]; and a WIN Development Cost Share Rate
[**] (described below) from [**] through [**].  If BCGI requests a [**] platform
for this solution from AGCS, this business arrangement will extend through [**].
BCGI and AGCS may renegotiate in good faith the continuation of this business
agreement at any time to continue after [**].

WIN Development Cost Share Rate will be [**] of use on the AGCS [**] WPS service
bureau application (either on a BCGI owned SCP or carrier owned SCP) until the
total AGCS proceeds for the [**] WPS solution, including the proceeds from this
WIN Development Cost Share Rate, the [**] of use fee through [**] described
above and any Advanced Payments (as described below) total [**] or more. For
payments beyond [**] and less than [**], the WIN Development Cost Share Rate
will be [**].  For payments beyond [**] and less than [**], the WIN Development
Cost Share Rate will be [**]. For payments beyond [**], the WIN Development Cost
Share Rate will be [**].  WIN Development Cost Share rate is subject to the
lower of the specified rate [**] of the cost BCGI charges its carriers. However,
the rate will not fall below [**] through [**] and will not fall below [**]
through [**]. The rate through [**], if this agreement is extended with the
addition of a [**] platform, will not fall below [**].

Maintenance fees for [**] WPS will be [**] cost BCGI pays to AGCS if BCGI
provides first level support and AGCS provides second level support, or [**]
cost if AGCS provides first level
<PAGE>
 
 Confidential Materials omitted and filed separately with the Securities and 
               Exchange Commission. Asterisks denote omissions.

support. Pricing for system sales without service bureau component will be
described in a separate agreement.

The [**] WPS solution will utilize the standard [**], WIN,[**] and [**]
developed prepaid messages.  Any BCGI specifications not covered by these
standards, including interfaces to BCGI's IP and rating engine, are the
exclusive properties of BCGI and cannot be disclosed or reused by AGCS or any
partner of AGCS, for any purpose, without prior written consent of BCGI. AGCS
must provide a reasonable demonstration of the controls that AGCS will put in
place to enforce this clause.

Neither [**] nor other [**] applications are included in this agreement. This
agreement does not preclude BCGI from developing [**] for prepaid or any other
[**] applications.

BCGI guarantees that an average of [**] subscribers will be on the [**] solution
each month from commercial deployment until the end of this agreement.  This
guarantee equates to approximately $9.0 million in WIN Development Cost Share
payments cumulatively to AGCS.   At the end of the agreement [**] if the total
of these payments does not equal or exceed $9.0 million, BCGI will compensate
AGCS the difference. Any payment made to compensate for unrealized revenues will
apply towards the [**] WIN Development Cost Share, should BCGI elect to port to
a [**] platform. After paying a total of at least $9.0 million, BCGI will have
an unlimited, fully-paid and perpetual license (excluding source code and
maintenance) to the [**] software.  AGCS agrees to place the source code in
escrow within 30 days following acceptance of the software by BCGI, upon
mutually agreed terms which shall include the provision that the source code
shall be released to BCGI in the event that AGCS ceases operations or is
otherwise unable or refuses in writing to maintain the software.  BCGI may also
elect to pay AGCS the cost paid by AGCS for any platforms jointly purchased for
development and testing of [**].  BCGI will take ownership of these platforms at
that time, but not later than [**].

AGCS and BCGI will respond to [**] based on mutually agreed upon terms.

Formal contract will be signed by November 14, 1998.

<TABLE>
<CAPTION>
PAYMENT TERMS:

Schedule                                   %      Amount    Responsibility  Date
--------                                 -----    ------    --------------  ----
<S>                                      <C>    <C>         <C>             <C>
Contract Signature                       [**]%  $[**]  
Functional Specifications (Roaming)      [**]%  $[**]         BCGI          [**]
Final Design Specifications (Roaming)    [**]%  $[**]         AGCS/BCGI     [**]
Integration Testing (Roaming)            [**]%  $[**]         AGCS          [**]
Final Acceptance (Roaming)               [**]%  $[**]         BCGI          [**]
Commercial Use (Roaming)                 [**]%  $[**]         BCGI          [**]
Integration testing: [**]
for 1 platform ([**] WPS solution)       [**]%  $[**]                       [**]
                                         ----   ----------
TOTAL                                     100%  $1,730,000
</TABLE>

Payment terms are detailed in the Agreement document.

Advance Payments

In addition to above payments, BCGI will provide AGCS with advance payments to
support the porting of [**] WPS to a [**] platform,[**], if BCGI desires this
porting.  BCGI will notify AGCS of which
<PAGE>
 
 Confidential Materials omitted and filed separately with the Securities and 
               Exchange Commission. Asterisks denote omissions.

platform to port to [**] by the end of [**].  At that time, BCGI will provide
AGCS with a [**] advance payment against future [**] revenue sharing.   BCGI
will expect delivery of this software [**] following.  At the time of acceptance
of this ported software, BCGI will provide AGCS with another [**] advance
payment.

BCGI may also elect to ask AGCS to port the [**] WPS system to a [**] platform
[**]. If BCGI chooses to ask AGCS to perform this [**] software port, BCGI will
provide AGCS with [**] advance payment at the time of the request, and expect
delivery of this additional ported software [**] following the request, and the
original business arrangement described above will extend through [**].  Upon
delivery and acceptance of this [**] ported software BCGI will provide AGCS with
another [**] advance payment against future [**] revenue. This [**] platform
will also be contingent on the details in the Platforms sections.

AGCS will not be required to return these payments to BCGS if [**] service
bureau revenue is not realized to cover these payments.

2.  ROAMING SOLUTION

Delivery of Roaming solution:

[**].

Warranty for Roaming solution:

[**] from commercial service


Assumptions - Roaming solution

          1.  Roaming solution will be based on specification [**] and BCGI
              roaming functional specifications, to be provided by BCGI.

          2.  Final development and delivery schedule will be finalized by [**].

          3.  All initial technical design issues will be resolved within [**]
              of contract signature date.

          4.  Application will execute on the [**].

3. [**] WPS SOLUTION
 
Platforms:

The [**] WPS solution will run on any two of the following platforms:[**]. BCGI
will notify AGCS as to which [**] will be done first by end of [**], at which
time AGCS will have [**] to develop the application. BCGI will notify AGCS of
the [**] by end of [**].  BCGI and AGCS will evenly split the cost for platforms
on which to develop and test the [**] solutions, if these platforms are
requested by BCGI.
 
<PAGE>
 
 Confidential Materials omitted and filed separately with the Securities and 
               Exchange Commission. Asterisks denote omissions.

BCGI may also elect to ask AGCS to port the [**] WPS system to a [**] platform
[**]. If BCGI chooses to ask AGCS to perform this [**] software port, BCGI will
provide AGCS with [**] advance payment at the time of the request, and expect
delivery of this additional ported software [**] following the request, and the
original business arrangement described above will extend through [**].  Upon
delivery and acceptance of this [**] ported software BCGI will provide AGCS with
another [**] advance payment against future [**] revenue.
 
     AGCS and BCGI will issue a joint statement to the industry that describes
this agreement (to be developed).

Delivery of [**] WPS solution [**]:

[**].
 
Warranty for [**] WPS solution:

[**] from commercial service of each platform.
 

Assumptions
          5.  [**] WPS Application will be based on [**] and a WIN prepaid
              functional specification to be provided by BCGI.
          6.  [**] will be separate from the [**] and will be provided by BCGI.
          7.  [**] will be provided by BCGI.
          8.  Service uses [**] WIN technology; not [**] technology.
          9.  Application enhancements will be as is being defined by [**] for
              Prepaid Service, [**] and as defined by BCGI specifications
          10. If BCGI elects to port to [**] platforms, BCGI and AGCS will
              evenly pay to provide these platforms to AGCS for development and
              testing purposes.
          11. Relevant porting of BCGI's [**] will be done by BCGI.
 
Major Network Interfaces

          12. [**] WIN [**] messages over [**]. This document is subject to
              changes and additions as the [**] standards get specified.]
          13. [**] WIN [**] messages over [**]. This document is subject to
              changes and additions as the [**] standards get specified.]
          14. [**] WIN,[**] messages over [**]. This interface is used by [**]
              to obtain [**] information.
          15. [**]: Proprietary BCGI message set over [**] or [**].
          16. Application will have all of the [**] necessary for its operation.
          17. Optionally, application shall support portions of the [**] to be
              resident on the subscriber's [**], with the application using the
              WIN,[**] to obtain the information from the [**]. This option
              permits the service provider to not have to duplicate [**] items
              of the subscriber but with a concomitant increase in [**] and
              corresponding [**].
          18. The [**], prepaid database and proprietary BCGI message set will
              be provided by BCGI
          19. [**] will be provided by BCGI
<PAGE>
 
                                 Attachment 2

                           AG Communication Systems
             Certificate of Acceptance of ______________ Software

PARTIES

               AG Communication Systems Corporation (AGCS)
               2500 West Utopia Road
               Phoenix, AZ 85027

               Cellular Express Inc. d/b/a Boston Communications Group (BCG)
               100 Sylvan Road
               Woburn, Massachusetts 01801

Agreement dated ____________, 1998.

Effective Date of Acceptance ________________, 1998.


BCG hereby certifies that the _________________ Software provided by AGCS and
identified above has passed the acceptance testing performed pursuant to the
above-referenced agreement and order and, consequently, BCG accepts said
_______________ Software.


_________________________________
      Company


By:  ____________________________

Name:     _______________________

Title:    _______________________

Date:     _______________________
<PAGE>
 
 Confidential Materials omitted and filed separately with the Securities and 
               Exchange Commission. Asterisks denote omissions.

                                 Attachment 3

                           DATA CONNECTION AGREEMENT

Cellular Express, Inc., a Massachusetts corporation d/b/a Boston Communications
Group ("BCG") and AG Communication Systems Corporation, a Delaware corporation
("AGCS") enter into this Data Connection Agreement as of November 16, 1998
("Effective Date").

I.   BACKGROUND

     A.   AGCS and BCG have entered into the Agreement effective as of 11/16
1998, in which AGCS shall provide BCG with services described in that Agreement.
Upon execution of this Data Connection Agreement, it shall be an Attachment to
and part of the Agreement to enable the parties to create a temporary dial-up
capability between them to facilitate the performance of both parties under the
Agreement.  This Data Connection Agreement shall govern the parameters of said
dial-up capability.

II.  AGREEMENT

In consideration of the Agreement and the mutual covenants contained therein,
AGCS and BCG agree to connect AGCS data facilities with BCG data facilities as
follows:

     A.   Facilities. The facilities to be used to connect AGCS' data facilities
          with BCG's data facilities are not intended to be a permanent
          connection between the two companies, but solely to execute the
          purposes and objectives of the Agreement. Such facilities shall
          consist of a dial-up connection and two modems, one at each end of the
          dial-up connection. The modem at the AGCS side is owned exclusively by
          AGCS, and the modem at the BCG side is provided by BCG. The dial-up
          connection is made over the public telephone network and will be
          activated by AGCS on request of BCG. BCG will provide AGCS with a 
          dial-up account in order to provide technical assistance when
          required. In order to prevent direct access to their respective
          internal networks, the connection between AGCS and BCG (via the dial-
          up connection) shall be connected outside the firewalls, or, if it is
          necessary to connect inside the firewalls, such connection shall be
          pursuant to the other party's security policy. Generally, the AGCS
          equipment will be connected to the AGCS subnet with the IP address of
          [**] and the BCG equipment will be connected to the BCG subnet with
          the IP address [**]. Both parties shall provide their complete IP
          subnet addresses to each other in writing. Such addresses may be
          changed from time to time as necessary, by written notification to the
          other party.
<PAGE>
 
     B.   Term.  The term of this Data Connection Agreement is concurrent with
          the term of the agreement. Breach of the Agreement shall constitute a
          material breach of this Data Connection Agreement. Notwithstanding any
          other provisions of the agreement, termination of this Data Connection
          Agreement shall be governed by Paragraph F in this Data Connection
          Agreement.

     C.   Information Transmitted ("Information")

          1.   In General.  The information that is transmitted between AGCS and
               BCG pursuant to this Data Connection Agreement will be limited to
               such data as is necessary to carry out the intent of the parties
               in the Agreement. The dial-up connection between AGCS and BCG may
               be initiated only by AGCS on an as-needed basis.

          2.   Information transmitted or Accessed Under This Data Connection
               Agreement Subject to Non-Disclosure. AGCS and BCG will safeguard
               the Information transmitted between them under this Data
               Connection Agreement as confidential data. Such information will
               be subject to all nondisclosure provisions set fort herein and in
               the Agreement. Each party agrees: (i) to use the other party's
               Information only for purposes of performance under the Agreement,
               (ii) not to reveal the Information to third parties except as
               required by law, and (iii) to take all reasonable precautions to
               safeguard the Information, all as required by the Agreement and
               this Data Connection Agreement.

          3.   Survival of Nondisclosure.  This nondisclosure obligation shall
               survive the termination or expiration of this Data Connection
               Agreement.

     D.   Responsibilities of the Parties.

          1.   Right to Audit.  Each party will provide access to the other
               party during normal business hours, and upon a mutually agreed
               schedule, for the purposes of auditing the facilities used in the
               transmission, to ensure compliance with the terms of this Data
               Connection Agreement. The right of audit includes, at a minimum,
               all of the systems or network endpoints that have access to the
               other party's data. Visiting employees performing the security
               audit as described herein will be escorted at all times by an
               employee of the facility owner. AGCS and BCG will use standard
               product features to provide for statistics and audit trails, when
               necessary. The auditing party is responsible
<PAGE>
 
               for the cost of audits, including, but not limited to, the time
               and material to support the audit and travel expenses.

          2.   Right to Perform Security Tests.  Each party will permit the
               other, during normal business hours and upon a mutually agreed
               schedule, to perform logical security tests by technicians or
               automated equipment designed to identify potential security
               risks. These tests shall be limited to discovering risks
               associated with the usage and/or connections established pursuant
               to this Data Connection Agreement.

          3.   Responsibility for Failed Components.  All network-related
               problems will be managed to resolution by the respective
               organizations, AGCS or BCG, as appropriate to the ownership of
               the failed component. AGCS and BCG will be responsible for all
               networking components within their respective data centers.

          4.   Physical Access.  All physical access to equipment and services
               required to transmit data in accordance with the terms of this
               Data Connection Agreement will be in secure locations.
               Verification of authorization will be required for access to all
               such secured locations.

          5.   Forbidden Use of Connection.  Use of any modem, or connection
               components for services or access not contemplated by the
               Agreement is forbidden. Any exception, other than access by third
               party vendors for maintenance purposes, shall require a written
               amendment to the Agreement.

     E.   Indemnification.  Each party agrees to indemnify the other party and
          to hold the other party harmless for any loss or damages as the result
          of:

          1.   the unauthorized access to the data facilities of the indemnified
               party through the indemnifying party's data facilities or
               equipment;

          2.   the misuse of Information obtained through the indemnifying
               party's data facilities, or otherwise obtained by the
               indemnifying party; or

          3.   any unauthorized access to, or misuse of, the data facilities, or
               Information of the indemnified party by the indemnifying party or
               any of its employees, agents, contractors, or other persons
               perpetrating such act through the indemnifying party's data
               facilities or equipment.
<PAGE>
 
     F.   Termination.  Either party may immediately suspend access to its data
          facilities or may immediately terminate this Data Connection
          Agreement, without cause, upon written notice to the other party.

     G    Amendment.  This Data Connection Agreement may only be amended in
          writing, signed by an authorized representative of each party hereto.
          This Data Connection Agreement supersedes and replaces all prior
          agreements, understandings, representations, promises and statements
          made by either party regarding the subject matter hereof.

     H.   Assignment.  The obligations and benefits of this Data Connection
          Agreement shall inure solely to the entities listed above, and not to
          any other entities, divisions or business units. This Data Connection
          Agreement shall immediately become void if it is assigned without the
          prior written consent of the other party.

     I.   Execution.  This Data Connection Agreement may be executed by the
          respective parties in counterparts, with each respective signature
          becoming effective upon receipt of a facsimile signature (original to
          be immediately delivered via overnight courier).

WHEREFORE, the parties authorized representatives have set their signatures
below.


CELLULAR EXPRESS, INC.                  AG COMMUNICATION
                                        SYSTEMS CORPORATION


By: /s/Kevin Thigpen                    By: /s/Charles Schulz
   -------------------------------         ---------------------------  

Name:  Kevin Thigpen                    Name:  Charles Schulz        
     -----------------------------           -------------------------  

Title: Vice President & Gen. Mgr.       Title:    VP & GM             
      ----------------------------            ------------------------    

Date: November 16, 1998                 Date: 11/12/98
     -----------------------------           -------------------------