Document:

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                                                                    Exhibit 10.8

                             AT&T WIRELESS SERVICES

                         VALUE ADDED RESELLER AGREEMENT

        AT&T Wireless Services National Accounts, Inc., as agent for certain of
its wireless telecommunications operating Affiliates, ("AT&T"), and the
Customer, as more specifically designated below, hereby agree that Customer's
acquisition of services from AT&T for resale and other permitted uses will be
pursuant to the terms and conditions as provided in this Agreement.

A.      CUSTOMER:

NAME OF CUSTOMER: OpenSky

ADDRESS OF CUSTOMER: 299 California Ave, Palo Alto, CA, 94301

TELEPHONE NUMBER: 650 473-9700

FAX NUMBER: 650 323-6785

PRINCIPAL CONTACT PERSONS: Barak Berkowitz, President, Patrick McVeigh, Chairman
and CEO

B.      DESCRIPTION OF AGREEMENT.

Customer would like to receive cellular digital packet data communications
service ("Service") from AT&T for Customer's distribution of certain value-added
communications services to its End Users. AT&T wishes to provide Service to
Customer based upon the value-added communications services provided by Customer
to its End Users in accordance with the terms and conditions of this Agreement.

C.      EFFECTIVE DATE.

The Effective Date of this Agreement is the date of Commercial Launch, as
defined below.

D.      TERM.

This Agreement commences on the Effective Date and remains in effect for one
year after the date of Commercial Launch, automatically renewing for successive
one-year renewal terms, unless terminated as described in the "Additional Terms
and Conditions" portion of this Agreement.

E.      EXHIBITS AND SCHEDULES

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               EXHIBIT A-APPLICATION

               EXHIBIT B-SERVICE AREA

               EXHIBIT C-SERVICE PLAN

               EXHIBIT D-END USER DISCLOSURES

All Exhibits and Schedules are attached hereto and incorporated into this
Agreement by this reference.

F.      ADDITIONAL TERMS AND CONDITIONS

        In consideration of the mutual promises contained in this Agreement, the
parties, and their successors and permitted assigns hereby agree as follows:

SECTION 1. DEFINITIONS

        1.1 AFFILIATE means, with respect to any entity, any other entity that
directly Controls, is Controlled by or is under common Control with the first
entity.

        1.2 APPLICATION means the combination of the Service and Customer's
value-added communications services provided to its End Users. The Application
is more specifically described in Exhibit A hereto.

        1.3 COMMERCIAL LAUNCH means the date agreed to by AT&T and Customer as
the date that the Application will be available for a beta test of up to 5000
End Users.

        1.4 CONTROL (and all conjugations thereof) means, with respect to any
entity, the direct or indirect possession of the power to direct the management
and policies of such entity.

        1.5 CUSTOMER EQUIPMENT means all equipment (other than equipment
comprising portions of AT&T's CDPD network) necessary to enable Customer or its
End Users to receive the Service including but not limited to Customer's network
facilities, and Customer's and End User's Wireless Data Units.

        1.6 END USER means an individual or entity obtaining access to Service
from Customer.

        1.7 EVENTS OF DEFAULT means the following:

               (i) the execution of any assignment for the benefit of creditors
or the filing for relief by either party under any applicable bankruptcy,
reorganization, moratorium, or similar debtor relief laws;

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               (ii) the appointment of a receiver for Customer or AT&T or for
substantially all of their respective assets or properties;

               (iii) the failure of either party to pay any sum owed to the
other hereunder at the time such amount comes due;

               (iv) the failure of either party to perform or observe any other
term, condition, or covenant to be performed by it under this Agreement;

               (v) the commission of any major felonies by or the filing of
criminal indictment by government authorities against a party, its proprietors,
partners, officers, directors or shareholders (to the extent such individuals
control in the aggregate or individual 20% or more of the voting rights or
equity interests of such party);

               (vi) the furnishing, within a 12-month period, by Customer to
AT&T of two or more checks that are not paid when presented due to insufficient
funds;

               (vii) an unauthorized assignment of this Agreement; and

               (viii) failure by Customer to meet the eligibility requirements
and all terms and conditions of each Service Plan selected by Customer.

Upon the occurrence of any of these Events of Default, a party shall be deemed
to be in default of this Agreement, unless such Event of Default is cured within
any applicable cure period identified in Section 10.2.

        1.8 NUMBER means, for each End User, the AT&T network equipment
identifier ("NEI") or mobile identification number ("MIN") assigned to Customer
for that End User to obtain access to Service.

        1.9 SERVICE means the CDPD and associated support services provided to
Customer by AT&T as set forth in this Agreement.

        1.10 SERVICE AREA means that area in which Service is made available to
Customer by AT&T. The current Service Area is set forth in Exhibit B, which
Exhibit B may be amended by AT&T from time to time. The Service Area consists of
AT&T Markets and Non-AT&T Markets as identified in Exhibit B.

        1.11 SERVICE PLAN means the rates and other terms and conditions under
which Customer purchases Service from AT&T. The current Service Plan(s) are set
forth in Exhibit C, which Exhibit C may be amended by AT&T from time to time as
provided in Section 5.1.

        1.12 SUBSCRIBER means any person or entity purchasing Service from AT&T,
including Customer.

        1.13 SUBSCRIPTION FRAUD means using or assisting another to use any
fraudulent scheme, false representation, or false credit device, or other
fraudulent means or devices in connection with Service; including, but not
limited to, the fraudulent production of information regarding a person's
identity or the use of unauthorized credit.

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        1.14 UNAUTHORIZED ACCESS means any unauthorized use of Service through
the modification of the electronic serial number ("ESN") originally installed by
the manufacturer in a Wireless Data Unit which shall include the practices
generally referred to as "counterfeiting," "cloning fraud," or "tumbling fraud".

        1.15 WIRELESS DATA UNIT means the equipment used to originate or receive
wireless data transmissions, including but not limited to personal digital
assistants and wireless modems.

SECTION 2. THE SERVICE

        2.1 PROVISION

               2.1.1 AT&T shall provide and Customer agrees to purchase Service
as provided in this Agreement. Customer acknowledges that Service is provided by
AT&T directly and through agreements with other carriers; and that AT&T cannot
control the quality of the services when provided through an agreement with
another carrier. AT&T shall use commercially reasonable efforts to provide the
Service in a manner using the reasonable care and skill of a competent
telecommunications services provider.

               2.1.2 Service provided pursuant to this Agreement will be
provided only upon the request of Customer's authorized representatives and not
by End Users, and only in connection with the Application.

               2.1.3 Customer is not authorized under this Agreement to use the
Service independent of the Application or in conjunction with any other value
added communications services unless Exhibit A is amended to include such other
value added communications services.

        2.2 SUPPORT SERVICES. AT&T will provide to Customer, and not directly to
End Users, network monitoring, technical assistance and trouble-shooting support
of the Service as described in AT&T's Support Procedures provided to Customer by
AT&T from time to time. Customer will cooperate with AT&T in any troubleshooting
of the Service and Customer Equipment required to maintain the efficient
operation of the Service.

        2.3 NUMBERS. Customer may order Numbers by complying with AT&T's
procedures for ordering Numbers. Additional Numbers will be issued to Customer
provided Customer is not in default hereof, and subject to any requirements for
a security deposit. AT&T may periodically be required for system or other
reasons to change any of Customer's Numbers. AT&T will, whenever possible, give
Customer prior written notice of such change. AT&T will use its best efforts to
minimize such changes.

        2.4 USE

               2.4.1 Customer shall use and resell the Service for lawful
business purposes and only in connection with the Application.

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               2.4.2 AT&T is obligated only to Customer, with which it is in
privity of contract, and not to End Users, with whom AT&T is not in privity. End
Users are not to be deemed third-party beneficiaries of this Agreement.

               2.4.3 Customer is solely responsible for all risks and expenses
incurred with its provision of the Service and the provision of the Application
to End Users. Except as provided in Section 20.3, Customer will pay AT&T for all
charges for Service used by Customer or its End Users or third parties using a
Number assigned to Customer. In connection with such activities, Customer will
act in all respects for its own account and will be responsible for such things
as credit verification, deposits, billing, collection, and bad debt.

               2.4.4 Customer will disclose to End Users the provisions set
forth in Exhibit D in substantially the form set forth therein.

               2.4.5 Customer is responsible for all End User support regarding
all aspects of End Users' use of the Service (whether arising in connection with
hardware, software or Service), including but not limited to issues relating to
modems, protocol stacks, software configuration and setup, usability issues,
Service activation, Service coverage, billing, and any and all other aspects of
technical services and customer care. This includes, but is not limited to,
Customer taking the End Users' calls and using reasonable commercial efforts to
remedy any Customer or End User-identified problem without AT&T's participation.
Customer will report a problem to AT&T only upon reasonable verification that
the problem is due to reasons other than misuse, malfunction or the failure of
the Customer Equipment to meet the technical standards for compatibility with
the Service, or failure of the End User to understand how to use the Service.

        2.5 CONTINUING RIGHT. AT&T will have the continuing right to market and
sell the Service and any other communications services to any third parties,
including but not limited to current, future and potential End Users, and to
communicate with such third parties, including but not limited to with respect
to Customer's performance hereunder.

        2.6 PROCEDURES. Customer will comply with AT&T's policies and procedures
for obtaining Numbers, for configuring and programming Customer Equipment, and
for activating or deactivating Service with respect to any End User. AT&T may
from time to time modify these policies and procedures by giving Customer
written notice of such modification.

        2.7 SERVICE AREA. The Service is available only to properly configured
Wireless Data Units within the Service Area and is subject to (i) transmission
limitations caused by atmospheric, topographical or other conditions affecting
transmission; (ii) equipment modifications, repairs and other similar activities
necessary for the proper or improved operation of the Service; (iii) equipment
failures beyond AT&T's reasonable control; and (iv) Customer Equipment
limitations.

        2.8 INTERRUPTIONS. The Service may be temporarily refused, limited,
interrupted or curtailed due to governmental regulations or orders, system
capacity limitations or equipment maintenance, repair, modifications, upgrades
or relocation. AT&T will notify Customer of scheduled network outages, and will
attempt to notify Customer of unscheduled network outages that are expected to
last more than four (4) hours and that may affect the Service.

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        2.9 LIMITATIONS ON USE. Customer and its End Users will comply with any
limitations on use of Service contained in the Service Plan. AT&T reserves the
right to audit use of Service to determine conformance with any limitation on
use. In the event AT&T determines in its sole discretion that usage does not
conform to such limitation on use, AT&T may terminate this Agreement.

SECTION 3. INTERCONNECTION

        Customer will be required to obtain and pay for any interconnection
services required to connect Customers or End Users' facilities to AT&T's
network. Customer will follow AT&T policies and procedures for such connections.

SECTION 4. CUSTOMER EQUIPMENT

        Customer will be responsible for the acquisition, programming,
installation, maintenance and repair of all Customer Equipment. Customer will
ensure that all Customer Equipment is technically and operationally compatible
with the Service and meets all applicable federal and state laws, rules and
regulations. Customer may not associate a Number with more than one Wireless
Data Unit.

SECTION 5. RATES

        5.1 AT&T is willing to offer the Service Plan to Customer based upon,
among other things, the commitments given by Customer under this Agreement and
Customer's ability and commitment to provide the value-added communication
services as described in Exhibit A.

        5.2 Customer will pay AT&T for Service provided to Customer and its End
Users in accordance with the applicable Service Plan.

        5.3 SPECIAL OFFERS. Unless the Service Plan provides otherwise, Customer
will not be entitled to participate in any promotions or have access to rewards,
free usage, special Subscriber offerings, equipment, warranty and insurance
packages, and other features provided to other Subscribers.

SECTION 6. EXCLUSIVITY

        6.1 ADVERTISING. For a period from the Effective Date to five months
after Commercial Launch, Customer shall not advertise or promote the
Application, either directly or indirectly, in a way which associates the
Application in any manner with competitors of AT&T other than to the extent
necessary to explain coverage in areas not served by AT&T.

        6.2 ACTIVATIONS. With respect to all End Users obtained by Customer
within an AT&T Market, Customer will assign such End Users a Number provided by
AT&T.

SECTION 7. CUSTOMER'S IDENTIFICATION OF AT&T SERVICE

        7.1 IDENTIFICATION AS VALUE ADDED RESELLER. Customer will identify
itself in marketing and collateral describing the Service according to the
graphic standards and guidelines as published by

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AT&T from time to time. AT&T may modify these graphic standards and guidelines
from time to time upon written notice to Customer.

        7.2 AT&T APPROVAL. All uses of any AT&T Marks (as defined in Section 19
below) by Customer must be approved in advance by AT&T Customer will be
responsible to ensure that all advertising and promotional activities conducted
by Customer will comply with all applicable laws, whether or not such
advertising was reviewed or approved by AT&T.

        7.3 QUARTERLY MEETINGS. The parties will meet once each calendar quarter
to review Customer's planned use of AT&T Marks during the next calendar quarter
and to coordinate the parties' use of AT&T Marks. Customer will be responsible
for scheduling these meetings.

        7.4 OBLIGATIONS UPON TERMINATION. Customer will immediately upon
termination of this Agreement either destroy all material referencing AT&T or
containing AT&T Marks, or will remove all references to AT&T or AT&T Marks
contained in such material.

SECTION 8. MARKETING FUNDS

        8.1 AMOUNT OF FUNDS. AT&T will make available to Customer up to
$10,000,000 in marketing funds to finance certain marketing activities approved
in advance by AT&T.

               8.1.1 After the Application has been tested and accepted by AT&T,
AT&T will make the first $5,000,000 available to Customer to be used for
activities which advertise or promote the launch of the Application.

               8.1.2 AT&T will make the second $5,000,000 available to Customer
after Customer has obtained 5,000 End Users on AT&T's Numbers. These funds will
be used for activities that advertise or promote the Application.

        8.2 USE OF FUNDS. The marketing funds made available by AT&T will be
used for activities that have been approved by AT&T and which include a
prominent display of AT&T's Marks (as defined in Section 19 below). These funds
may not be used by Customer to subsidize the price of any Wireless Data Units
for End Users. These funds must be directed to potential End Users within AT&T
Markets, provided that internet and national (as agreed by AT&T) marketing
efforts shall be deemed to be directed to potential End Users within AT&T
Markets.

               8.2.1 CUSTOMER FUNDS. During the term of this Agreement and at
the times that AT&T contributes marketing funds, Customer will contribute an
equal amount of funds for similar marketing activities; provided that funds
contributed by Customer may be used to subsidize the price of Wireless Data
Units for End Users.

        8.3 ACCESS TO FUNDS. To access the marketing funds described in this
section, Customer must submit a request for the funds, together with a
description of the activities to be funded and a budget of the costs of the
activities. AT&T will use reasonable efforts to respond to each such request

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within 10 days of receipt. Upon approval of the activities and the budget by
AT&T, Customer may have access to the amount approved, which shall be provided
by AT&T promptly after such approval. Customer may begin submitting requests for
funds at any time after the Effective Date.

        8.4 REPORTS. Customer will provide a quarterly report of the activities
funded by the marketing funds, including a report of money actually spent on the
activities.

        8.5 AUDIT. From time to time, AT&T may request an audit as to Customer's
use of marketing funds. Upon reasonable notice from AT&T, Customer shall make
available to AT&T or AT&T's representative books and records sufficient to
verify the amount of Customer's expenditures, the items or services purchased by
the funds, and the publication, broadcast or occurrence of the activities so
funded.

        8.6 TERMINATION AND REPAYMENT OF FUNDS. In the event that the Agreement
is terminated for any reason prior to the end of its term, AT&T will not be
responsible for the payment of any marketing funds described in this Section for
any activities which have not been approved as of the termination date. Further,
in the event that this Agreement is terminated for any reason prior to the end
of its term, any marketing funds for which expenditures have not been approved
by AT&T shall revert to AT&T.

SECTION 9. INVOICES, PAYMENTS, TAXES AND SECURITY DEPOSITS

        9.1 INVOICES. AT&T will provide Customer written invoices on a monthly
basis. Customer shall pay all charges associated with Service.

        9.2 PAYMENT. Customer will pay each invoice within thirty (30) days
following the invoice date. Any payment not received within such time will
accrue interest at the lesser of one and one-half percent (1.5%) per month or
the maximum lawful rate. Additional fees will be assessed for any check returned
for insufficient funds. Customer is responsible for payment of and shall pay all
charges for Service furnished under this Agreement.

        9.3 BILLING ADJUSTMENTS. In the event of a total Service outage
("outage") within the portion of the Service Area associated with any Number
which is not caused by the Customer or its End User, and which lasts for a
period of twenty-four (24) hours or more, a credit allowance will be made at
Customer's request in the form of a pro rata adjustment of the fixed charges
billed by AT&T to Customer with respect to such Number. Periods of discontinuous
outage, where the outage is separated by over 2 hours of service may not be
accumulated in determining if an outage has continued for at least twenty-four
(24) hours. In order to receive such credit, Customer must submit a written
request to AT&T, stating the date and location of the outage, the Numbers
affected, and such other information as AT&T may reasonably require. Such notice
must be received by AT&T within ten (10) business days following the last date
of the period of outage. Except as provided herein, AT&T shall incur no
liability for outages.

        9.4. DISPUTED CHARGES.

               9.4.1 PROCEDURE TO DISPUTE CHARGES. Customer shall timely pay any
undisputed charges. As a prerequisite to disputing any charges, Customer must
(i) notify AT&T in writing within

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five (5) business days of the due date of a bill that Customer disputes certain
charges, (ii) advise AT&T of the basis of its dispute, and (iii) provide AT&T
with such documentation as it may have to support its position. Within thirty
(30) business days thereafter, AT&T shall provide Customer with a written
response supported by documentation. If AT&T's response indicates a continuing
dispute, within ten (10) business days thereafter, Customer and AT&T shall meet
in a good faith effort to resolve the billing dispute. Any dispute not resolved
within thirty days of AT&T's response may be submitted by either party to
arbitration.

        9.4.2 LOSS OF WIRELESS DATA UNIT. In the event Customer's or an End
User's Wireless Data Unit is lost, stolen, or otherwise absent from Customer's
or the End User's possession or control, Customer shall nevertheless be liable
for all charges attributable to the Number assigned to such Wireless Data Unit
until it notifies AT&T during business hours of such loss, theft, or
unauthorized absence, in which case, Customer's liability therefor shall
terminate at the earlier of (i) deactivation of the Number by AT&T, or (ii) the
end of one (1) business hour after such notification is received by AT&TAT&T
shall use reasonable efforts, taking into account all circumstances which shall
include other operational demands placed upon its employees, to deactivate
Service to the Number affected as soon as practicable.

        9.5 TAXES. Customer will pay all applicable federal, state and local
sales, use, public utilities, gross receipts or other taxes, fees, or recoveries
imposed on AT&T as a result of this Agreement (collectively, "Taxes") (other
than taxes imposed on the net income of AT&T). Customer will submit certificates
of resale for federal excise tax and as required for the states in which it will
resell Service. Customer is responsible for collecting from its End Users and
paying all Taxes associated with its provision of Service and the Application.
Customer will reimburse AT&T for any such Taxes paid by AT&T on Customer's
behalf.

        9.6 SECURITY DEPOSITS. In the event that Customer is more than thirty
(30) days late on any three consecutive payments, AT&T may require Customer to
provide it with a cash deposit or other security reasonably acceptable to AT&T
based upon AT&T's assessment of Customer's creditworthiness.

SECTION 10. TERMINATION

        10.1 TERMINATION AT END OF TERM. Either party may terminate this
Agreement by providing the other party with written notice of termination at
least ninety (90) days prior to the end of the then current term.

        10.2 TERMINATION UPON DEFAULT. Upon an Event of Default which the
defaulting party fails to cure within thirty (30) days following its receipt of
written notice from the non-defaulting party the non-defaulting party, in
addition to any other remedies it may have at law or in equity (including the
right to recover or resolve any actual or potential damages to or claims against
a party during any notice period), may terminate this Agreement without further
notice after expiration of any additional time to cure the default as provided
in the notice to the defaulting party.

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        10.3 TERMINATION FOR GOVERNMENTAL REASONS. AT&T may terminate this
Agreement immediately and without penalty upon written notice to Customer if the
Federal Communications Commission, any other regulatory agency, legislative
body, or court promulgates any rule, regulation, judgment or order that
prohibits or substantially impedes (in effect or application) AT&T from
fulfilling its obligations hereunder. AT&T will notify Customer promptly
following AT&T's determination that an event permitting termination under this
Section has occurred.

        10.4 SURVIVAL. Any and all provisions of this Agreement that may
reasonably be interpreted or construed as surviving termination or which may be
necessary or convenient for a party to effectively enforce the terms of this
Agreement will survive the termination of this Agreement.

        10.5 PAYMENT UPON TERMINATION. Upon termination of this Agreement for
any reason, all amounts owing to AT&T hereunder will become due and payable and
AT&T reserves the right to offset or deduct any amounts due from Customer
against security deposits or other funds due to Customer.

SECTION 11. FORCE MAJEURE

        Neither party will be liable for any loss, damage, cost, delay or
failure to perform resulting from causes beyond its reasonable control
including, but not limited to, acts of God, fires, floods, earthquakes, strikes,
insurrections, governmental orders, riots, lightning or storms, or delays of
suppliers or subcontractors for the same causes.

SECTION 12. INDEMNIFICATION AND INSURANCE

        12.1 INDEMNITY. Customer and AT&T each hereby agree to defend,
indemnify, and hold harmless each other and each other's Affiliates, and their
former, current, and future officers, directors, employees, agents, successors,
and assigns, from and against any claims, costs, and expenses, including
punitive damages, court costs, and reasonable attorneys' and expert witness'
fees before and at trial and on appeal (collectively, "Claims"), arising from a
breach of this agreement by or any conduct in connection with this Agreement by
the indemnifying party (including such party's Affiliates, and their officers,
directors, employees, agents, and contractors). Customer further agrees to
defend, indemnify, and hold harmless AT&T, its Affiliates, and their former,
current, and future officers, directors, employees, agents, successors, and
assigns, from and against any Claims of End Users. Notwithstanding the
foregoing, the obligations of both Customer and AT&T to defend, indemnify, and
hold harmless shall not apply to the extent such claims result from the other
party's negligence or willful misconduct.

        Within ten days after being notified of any Claims to which these
indemnification obligations may apply, the party receiving such notice shall
notify the party from whom the indemnification is sought (the "Indemnifying
Party"), and shall give reasonable opportunity to the Indemnifying Party to
defend the claim at its own expense and with counsel of its own selection;
provided, however, that the party seeking indemnification shall at all times
have the right to participate fully, at its own expense, in the defense of and
to approve any settlement of the Claims.

        If the Indemnifying Party, within 30 days after notice, shall fail to
accept defense of the Claims, then the party seeking indemnification shall have
the right, but not the obligation, to undertake the defense of, and to
compromise or settle (exercising reasonable business judgment), the Claims on

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behalf, for the account, and at the risk of the Indemnifying Party. If the
Claims cannot by their nature be defended solely by one party, the other party
shall make available all information and assistance that may reasonably be
requested, regardless of any obligations to indemnify hereunder.

        12.2 INSURANCE.

        Customer shall keep in full force and effect a policy of public
liability, personal injury, property damage, and contractual liability insurance
with respect to the business operated by Customer, which insurance shall cover
each occurrence in an amount not less than $1,000,000 and shall cover property
damage in an amount not less than $500,000.00. Such policy or policies shall
name AT&T as an additional insured and shall be procured from an insurance
carrier reasonably acceptable to AT&T. Upon request, Customer shall furnish AT&T
with a certificate evidencing such insurance. Such insurance shall provide that
the insurer will not cancel, materially alter, or allow such insurance to expire
without first giving AT&T thirty (30) days prior written notice.

SECTION 13. NO WARRANTIES

        AT&T SUPPLIES A SERVICE, AND NOT GOODS. AT&T MAKES NO WARRANTIES,
EXPRESS OR IMPLIED, WITH RESPECT TO THE SERVICE OR THE PERFORMANCE OF ANY
OBLIGATIONS HEREUNDER INCLUDING, WITHOUT LIMITATION, WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. ALL SUCH WARRANTIES ARE
EXPRESSLY EXCLUDED. AT&T IS NOT THE MANUFACTURER OF ANY CUSTOMER EQUIPMENT AND
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, WITH RESPECT THERETO. TO THE EXTENT
AT&T PROVIDES ACCESS TO INFORMATION PROVIDED BY OTHER SOURCES, AT&T ACCEPTS NO
LIABILITY FOR AND MAKES NO WARRANTIES, EXPRESS OR IMPLIED, WITH RESPECT TO THE
CONTENT THEREOF. CUSTOMER HAS NOT RELIED ON AND WILL NOT CLAIM THAT IT IS
ENTITLED TO THE BENEFITS OF ANY REPRESENTATIONS, PROMISES, DESCRIPTION OF
SERVICES OR OTHER STATEMENT NOT SPECIFICALLY SET FORTH IN THIS AGREEMENT.

SECTION 14. LIMITATION OF LIABILITY

        14.1 NO CONSEQUENTIAL DAMAGES. NEITHER PARTY WILL BE LIABLE TO THE OTHER
(OR ITS END USERS, CUSTOMERS OR ANY THIRD PARTY) FOR ANY INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES ARISING OUT OF SUCH PARTY'S FAILURE TO PERFORM UNDER THIS
AGREEMENT. NOTHING IN THIS SECTION 14.1 WILL LIMIT A PARTY'S OBLIGATION TO FULLY
INDEMNIFY THE OTHER UNDER SECTION 12 FOR ACTIONS BROUGHT BY THE INDEMNIFYING
PARTY'S CUSTOMERS, END USERS OR BY ANY THIRD-PARTY, EVEN IF SUCH ACTIONS INCLUDE
CLAIMS FOR INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.

        14.2 LIMITATION OF ACTIONS. EXCEPT FOR ACTIONS ARISING IN CONNECTION
WITH SECTION 12, NEITHER PARTY MAY BRING A LEGAL ACTION WITH RESPECT TO THIS
AGREEMENT MORE THAN TWENTY-FOUR (24) MONTHS AFTER THE CAUSE OF ACTION ACCRUES.

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        14.3 LIABILITY CAP. EXCEPT FOR LIABILITIES ARISING UNDER SECTION 12, THE
AGGREGATE LIABILITY OF AT&T FOR CLAIMS RELATING TO THIS AGREEMENT, WHETHER FOR
BREACH OR IN TORT, WITH RESPECT TO CUSTOMER, END USERS, OR OTHER USERS OF
SERVICE OR FACILITIES, WILL NOT EXCEED THE AMOUNT PAID BY CUSTOMER TO AT&T IN
THE TWO MONTH PERIOD PRECEDING THE DATE THE CLAIM AROSE.

        14.4 PARTY. FOR THE PURPOSES OF THIS SECTION 14, "PARTY" MEANS THE
PARTY, ITS SUBSIDIARIES AND AFFILIATES AND THEIR RESPECTIVE OWNERS DIRECTORS,
OFFICERS, EMPLOYEES, AGENTS, REPRESENTATIVES, SUBCONTRACTORS AND SUPPLIERS.

        14.5 SECURITY. ALTHOUGH THE LAW GENERALLY PROHIBITS THIRD PARTIES FROM
MONITORING CELLULAR TRANSMISSIONS, AT&T CANNOT GUARANTY THE SECURITY OF DATA
TRANSMISSIONS. AT&T SHALL NOT BE LIABLE FOR ANY LACK OF SECURITY RELATING IN ANY
WAY TO USE OF THE SERVICE OR CUSTOMERS OR ITS END USERS DATA TRANSMISSIONS.
CUSTOMER AGREES THAT AT&T SHALL NOT BE LIABLE FOR DISCLOSURES AS A RESULT OF USE
OF THE SERVICE.

SECTION 15. CONFIDENTIALITY

        15.1 CONFIDENTIAL INFORMATION. During the term of this Agreement either
party may (but shall not be obligated to) disclose to the other information
which is considered proprietary or confidential by the disclosing party. Without
the disclosing party's specific prior written consent, disclosure shall not be
made to a third party (including but not limited to End Users) of any
information which is designated confidential or proprietary and which is
supplied by one party to the other party; and which information is not otherwise
generally available to the public or is not already known to the other party;
provided, however, either party may disclose such information in compliance with
court processes or similar agency requirements if the other party has been given
ten days prior written notice of the proposed disclosure or as much notice as is
reasonably possible if the situation does not permit such ten (10) day notice.
The parties agree that equitable relief is available for any breach or
threatened breach of this Section 15.

        15.2 ADDITIONAL PROTECTION OF CONFIDENTIAL INFORMATION. In the
performance of this Agreement, AT&T's Affiliates, officers, directors, agents
and employees may come into possession of information about Customer's End
Users, including but not limited to Numbers and usage or other forms of
identification of End Users. Neither AT&T nor any person or entity obtaining
such information by or through AT&T may use any such information except as
required to provide Service to Customer under this Agreement. However, any
information independently developed by AT&T which includes End User data may be
used by AT&T at its sole discretion. Such information shall be treated as
Customer proprietary information pursuant to Section 15.1 above.

SECTION 16. NOTICES

        All notices, consents, approvals and other communications required or
permitted to be given or made hereunder (a "notice") will be in writing and will
be delivered (i) personally (if to a corporation, to an officer; if to a
partnership, to a partner; if to a limited liability company, to a member or
manager); (ii) by private overnight courier; (iii) by facsimile transmission; or
(iv) by registered or

                                      -12-

<PAGE>   13

certified mail, sent to the recipient's address or facsimile telephone number
and attention of the individual as set forth following the signature lines
hereto, or to the registered agent of the recipient in the recipient's state of
incorporation or formation, or such other address or facsimile telephone number
or individual as may be specified by notice. All notices will be deemed to have
been given on (i) the date of receipt if delivered personally or by private
overnight courier; (ii) the date of transmission with confirmation of successful
transmission by the sender's equipment if transmitted by facsimile transmission;
or (iii) the third day following posting if transmitted by registered or
certified mail. Any notice received after 5:00 p.m. local time in the city and
state where delivered shall be deemed to have been made on the next business
day.

SECTION 17. ASSIGNMENT

        Except as provided in this Section, neither party may assign or transfer
this Agreement, or its rights or obligations hereunder, without the prior
written consent of the other party. Either party may assign this Agreement,
without the other's consent, to (i) any Affiliate of the assignor, or (ii) any
person or entity that acquires the assignor or substantially all of the
assignor's business through any merger, consolidation or stock or asset
purchase; provided that the assignee agrees in writing to be bound by the
provisions of this Agreement. In addition, AT&T may assign certain of its rights
and obligations under this Agreement without Customer's consent.

SECTION 18. NO AGENCY

        AT&T and Customer are independent contracting parties. This Agreement
does not create any partnership, joint venture or agency relationship between
the parties.

SECTION 19. MARKS

        19.1 Customer recognizes the right, title and interest of AT&T and its
respective Affiliates in and to all service marks, trademarks and trade names
used by any of them in connection with the Service (the "Marks"). Customer
agrees not to engage in any activities or commit any acts, directly or
indirectly, which may contest, dispute, or otherwise impair such right, title,
and interest of AT&T and its respective Affiliates therein. Customer will not
gain any property rights to the Marks by virtue of this Agreement and will not
use any Marks without AT&T's prior written consent.

        19.2 AT&T recognizes the right, title and interest of Customer and its
respective Affiliates in and to all service marks, trademarks and trade names
used by any of them in connection with the Service (the "Customer Marks"). AT&T
agrees not to engage in any activities or commit any acts, directly or
indirectly, which may contest, dispute, or otherwise impair such right, title,
and interest of Customer and its respective Affiliates therein. AT&T will not
gain any rights to the Customer Marks by virtue of this Agreement and will not
use any Customer Marks without Customer's prior written consent.

        19.3 Neither party will engage in any activity that may be harmful to
the other party's goodwill or may reflect unfavorably on its marks. This
prohibition includes, without limitation, the commission of any unfair trade
practice, the publication of any false, misleading or deceptive advertising, or
the commission of any fraud or misrepresentation.

                                      -13-

<PAGE>   14

        19.4 All advertising and promotional activities conducted by Customer
will be completely factual and ethical, and Customer shall be solely responsible
for the content thereof, whether or not reviewed by Company.

SECTION 20. ABUSE; INTERFERENCE

        20.1 ABUSE OR FRAUDULENT USE. Service to a Number may be restricted
according to procedures set forth in this Section 20 if there is abuse or
fraudulent use thereof. Abuse and fraudulent use of Service include, but are not
limited to:

               (i) Attempting or assisting another to access, alter, or
interfere with the communications of and/or information about another wireless
customer;

               (ii) Tampering with or making an unauthorized connection with any
AT&T facilities;

               (iii) Subscription Fraud;

               (iv) Using Service in such a manner so as to interfere
unreasonably with the use of Service by one or more other wireless customers or
End Users or to interfere unreasonably with AT&T's ability to provide Service;

               (v) Using Service to convey information which is obscene,
salacious, prurient, or unlawful; and

               (vi) Unauthorized Access.

        Customer agrees to make good faith efforts to minimize abuse or
fraudulent use as described above, to promptly report to AT&T any such abuse or
fraudulent use of which Customer becomes aware, and to cooperate in any
investigation or prosecution initiated by AT&T.

        20.2 CANCELLATION OF SERVICE TO END USER. AT&T may require Customer to
cancel the right to market or use Service by any of its agents or End Users
abusing or fraudulently marketing or using Service. However, if Customer has
requested advance notice of cancellation as provided in AT&T's procedures, AT&T
will not cancel Service until receipt of Customer's notice. For so long as AT&T
acts in good faith under this Section, Customer shall indemnify and hold AT&T
harmless as set forth in Section 12.1 against any Claims arising therefrom.

        20.3 LIABILITY FOR ABUSE OR FRAUDULENT USAGE. Customer shall be liable
for charges or other costs or damages resulting from abuse or fraudulent use as
described below.

               20.3.1 Customer shall have full liability for charges, costs or
damages resulting from Subscriber fraud, or from Customer or any of Customer's
employees, agents or End Users, either negligently or intentionally facilitating
the abuse or fraudulent use which shall include, without limitation, any failure
to give prompt notice of suspected abuse or fraudulent use based on information
available to Customer.

               20.3.2 If at any time AT&T or Customer reasonably suspects that
any Number(s) may be, has been, or is being used to abuse or fraudulently obtain
use of Service, and AT&T is permitted to terminate Service to that Number(s)
immediately upon AT&T's discovery and without prior notice to Customer, Customer
shall have no liability for abuse or fraudulent use charges, costs or damages
incurred after AT&T's discovery, provided Customer has not asked for notice
pursuant to Section

                                      -14-

<PAGE>   15

20.3.3 AT&T shall use reasonable efforts to provide prompt subsequent notice of
termination of Service to Customer during business hours.

               20.3.3 Customer may notify AT&T in writing that it elects to
receive advance notice of the cessation of Service to Numbers as the result of
suspicions of abuse or fraudulent use. In such case, commencing at the time AT&T
determines, or Customer claims it suspects, that a Number may be, has been, or
is being used for abuse or fraudulent use, Customer shall bear full liability
for any further usage of the Number until one (1) hour after the Customer
notifies AT&T of its request to terminate Service with respect to such Number.

               20.3.4 In the event Customer determines that charges, costs or
damages on an invoice are the result of Unauthorized Access which was not
previously discovered by the parties, Customer shall not be liable for such
Unauthorized Access if Customer provides AT&T with clear and convincing evidence
of the Unauthorized Access, such as: (i) call detail information for the End
User's account; and (ii) a statement by Customer that it has thoroughly
investigated the alleged Unauthorized Access and that it will cooperate
reasonably in obtaining affidavits or other required documentation required for
any prosecution of the person fraudulently using the Service. AT&T may require
affidavits prior to issuing any credits if Customer does not comply with this
Section. Such investigation by Customer should include contacting or attempting
to contact a sufficient number of recipients of calls at issue of each End User
so as to establish a reasonable basis for inferring that the remainder of such
calls were the result of unauthorized access.

SECTION 21. ARBITRATION; JURISDICTION; GOVERNING LAW

        21.1 STATE LAW. The validity, construction, and performance of this
agreement shall be governed by and interpreted in accordance with the laws of
the state of Washington.

        21.2 COURT PROCEEDINGS/VENUE. The parties hereby consent to the sole and
exclusive jurisdiction and venue of the state and federal courts located in King
County, Washington.

        21.3 ATTORNEY'S FEES. In the event an action is commenced by either
party to enforce the terms of this Agreement, the substantially prevailing party
in such action shall be entitled to its reasonable costs and attorneys' and
expert witness' fees incurred therein through appeal. For purposes of this
Section, the efforts of in-house attorneys and their staff shall be valued at
rates prevailing in the market for private practitioners.

SECTION 22. GENERAL

        22.1 WAIVER. The waiver of any provision or default of this Agreement
will not constitute a waiver of any other provision or default. If any provision
of this Agreement is deemed to be unenforceable, the remaining provisions will
remain in full force and effect.

        22.2 SEVERABILITY. Should any part of this Agreement for any reason be
declared invalid by court order or by any regulatory agency, such order shall
not affect the validity of any remaining portion; and the remaining portion of
the Agreement shall continue in full force and effect unless such order
materially alters the nature of the obligations of either party hereto. In such
event, this Agreement shall immediately terminate.

        22.3 ENTIRE AGREEMENT. This Agreement, together with its attached
Exhibits, sets forth the entire agreement between the parties concerning the
subject matter hereof. Any amendment or

                                      -15-

<PAGE>   16

modification to this Agreement will be effective only if made in writing and
signed by both parties. Provided, however, this Agreement shall be deemed
automatically amended to the extent inconsistent with any federal, state or
local law, regulation, court order or tariff required to be filed by AT&T.

        22.4 COUNTERPARTS. This Agreement may be executed in one or more
counterparts, each of which shall constitute an original agreement, but all of
which together shall constitute one and the same instrument.

        22.5 COMPLIANCE WITH LAWS. AT&T and Customer shall at all times comply
in all material respects with all laws, rules and regulations applicable to the
performance of this Agreement. In the event that the Service is or becomes
subject to any Federal, state, or local regulation or tariff, then those
provisions shall be deemed amended immediately as may be required under such
regulation or tariff.

        22.6 AMENDMENTS. This Agreement may be amended only by a written
instrument executed by both parties.

        22.7 PREPARATION OF AGREEMENT. This Agreement shall not be construed
more strongly against any party regardless of who is responsible for its
preparation or drafting.

SECTION 23. INDEPENDENT INVESTIGATION

        AT&T and Customer acknowledge they have read this Agreement and
understand and accept the terms, conditions, and covenants contained herein.
Customer acknowledges and understands that AT&T may at any time also be engaged
directly or indirectly through other resellers and through dealers or outlets of
any kind, in soliciting potential Subscribers for the Service or other services
or products. Customer acknowledges that it understands that it will not obtain
any exclusive rights under this Agreement, either with respect to a ---
territory or otherwise Customer also acknowledges and understands that AT&T may
sell the Service to others who may resell it. Customer has independently
investigated the business of providing wireless data service and the
profitability (if any) and risks thereof and is not relying on any
representation, guarantee, or statement of AT&T other than as set forth in this
Agreement.

        Customer also acknowledges that AT&T does not represent: (i) the amount
of profits, net or gross, that Customer can expect from its operations under
this Agreement or that Customer will derive income from the sale of AT&T's
services under this Agreement; (ii) that AT&T will refund any payments made by
Customer to AT&T under this Agreement except as otherwise provided herein;(iii)
AT&T will provide a sales or marketing program that will enable Customer to
derive income under this agreement.

        Customer further acknowledges that, except as specifically set forth in
this Agreement, AT&T does not make any representations regarding: (i) the
quantity or quality of service to be sold by Customer; (ii) the provision by
AT&T to Customer of training and management assistance; (iii) the size (other
than the geographic area), choice, potential, or demographic nature of the area
in which AT&T's service is available or the number of other dealers or reselling
customers that are or may in the future operate in that area; (iv) the
termination, transfer, or renewal provisions of this Agreement other than as set
forth in the Agreement; or (v) the sponsorship or participation of a primary
marketer of trademark products or services in Customer's operations under this
Agreement other than as may be set forth in this Agreement.

                                      -16-

<PAGE>   17

        AT&T acknowledges that Customer may at any time solicit potential
customers for wireless data service provided by Customer directly or indirectly
through business relationships with entities competing with AT&T.

CUSTOMER: OmniSky Corp              AT&T WIRELESS SERVICES NATIONAL ACCOUNTS,
                                    INC., AS AGENT FOR CERTAIN OF ITS AFFILIATES

By /s/ Signature Illegible          By /s/ Signature Illegible
Its:                                Its: SR. VP

                                      -17-

<PAGE>   18

                                    EXHIBIT A

                                   APPLICATION

Customer will offer end-users CDPD service on handheld devices in order to
access the internet and to provide certain internet-based content and
applications. Through integration and customization Customer will offer the user
a simple integrated solution from a single source that provides hardware,
service and support.

                                      -18-

<PAGE>   19

                                    EXHIBIT B

                                  SERVICE AREA

Customer can receive Service in the following MSAs:

ARIZONA:              Phoenix*, Tucson*

CALIFORNIA:           Fresno, Sacramento, San Diego*, San Francisco*, San Jose*,
                      Bakersfield*

COLORADO:             Denver

CONNECTICUT:          Bridgeport*, Hartford*, New Haven*, New London/Norwich*

DELAWARE:             Wilmington*, Dover*

FLORIDA:              Orlando, Tampa/St. Petersburg, West Palm Beach/Boca Raton

                      Miami/Ft. Lauderdale, Lakeland/Winter Haven*

ILLINOIS:             Chicago*

INDIANA:              Gary*, Indianapolis*

KENTUCKY:             Louisville*

MARYLAND:             Baltimore*, Frederick*

MASSACHUSETTS:        Boston*, Worcester*

MICHIGAN:             Detroit*

MINNESOTA:            Minneapolis/St. Paul

MISSOURI:             St. Louis*

NEVADA:               Las Vegas, Reno

NEW HAMPSHIRE:        Manchester*

NEW JERSEY:           Atlantic City*, Trenton*, Long Branch*, New Brunswick*,
                      Ocean City*, Vineland

NEW MEXICO:           Albuquerque*, Las Cruces*

NEW YORK:             New York

NORTH CAROLINA:       Charlotte*, Raleigh*

OHIO:                 Cincinnati*, Columbus*, Dayton*, Cleveland*, Akron*,
                      Canton*

<PAGE>   20

OKLAHOMA:             Oklahoma City, Tulsa

OREGON:               Portland

                                      -19-

<PAGE>   21

PENNSYLVANIA:         Pittsburgh, Allentown*, Philadelphia*

SOUTH CAROLINA:       Columbia*, Greenville*

TENNESSEE:            Memphis*, Nashville*

TEXAS:                Austin, Dallas/Ft. Worth, San Antonio, El Paso*, Houston*,
                      Galveston*

UTAH:                 Salt Lake City

VIRGINIA:             Newport News*, Richmond*, Norfolk*

WASHINGTON:           Seattle/Everett, Tacoma

WASHINGTON D.C.*

*Non-AT&T Markets.

                                      -20-

<PAGE>   22

                                    EXHIBIT C

                                  SERVICE PLAN

                                  DEFINITIONS:

AT&T MARKETS: Markets where AT&T provides Service directly, as indicated on
Exhibit B.

NON AT&T MARKETS: Markets where Service is available through AT&T's intercarrier
agreements, as indicated on Exhibit B.

                                  SERVICE PLAN:

MONTHLY ACCESS FEE:

Customer will pay a Monthly Access Fee for each Number activated on AT&T's
Service. This fee is pro-rated on a daily basis for periods of less than one
month in which a Number is active. The amount of the fee varies based upon the
number of End Users active on AT&T's Service as of the end of the month. At all
levels, the first 1000 kilobytes of Service ("Included Kilobytes") in any month
are included. Unused monthly Included Kilobytes cannot be carried over to any
subsequent month. Included Kilobytes are calculated on an aggregate basis across
all End Users active on AT&T's Service as of the end of the month.

<TABLE>
<CAPTION>
        Number of Active End Users                    Monthly Fee Per End User
        --------------------------                    ------------------------
<S>                                                   <C>
             0 - 10,000                                          $26.50
             10,001 - 30,000                                     $26.50
             30,001 - 50,000                                     $22.00
             50,001 - 100,000                                    $17.50
             100,001 +                                           $14.00
</TABLE>

USAGE CHARGES:

Usage charges are assessed on a per kilobyte basis after the first 1000 in any
month and varies based upon the number of End Users active on AT&T's Service as
of the end of the month.

                                      -21-

<PAGE>   23

<TABLE>
<CAPTION>
        Number of Active End Users                  Usage Charge per Kilobyte
        --------------------------                  -------------------------
<S>                                                 <C>
                   0 - 10,000                       AT&T Markets:     $.03
                                                    Non-AT&T Markets: $.05

               10,001-30,000                        AT&T Markets:     $.03
                                                    Non-AT&T Markets: $.05

              30,001 - 50,000                       AT&T Markets:     $.025
                                                    Non-AT&T Markets: $.05

              50,001 - 100,000                      AT&T Markets:     $.02
                                                    Non-AT&T Markets: $.05

              100,001 +                             AT&T Markets:     $.015
                                                    Non-AT&T Markets: $.05
</TABLE>

CHARGE CAP:

During the period from November 15th 1999 to April 30th 2000 the total aggregate
of usage charges and access fees shall not exceed $50 per User per month for
the first 5000 Users. E.g.: If there are 3,000 subscribers signed up in a given
month charges for that month excluding assignment fees, shall not exceed
$150,000. Additional Users beyond the first 5000 will be charged as stated in
the table above.

Customer will provide AT&T with 75 accounts, at no charge, to be used for
employee and demonstration purposes. AT&T will provide the IP addresses and
Wireless Data Units to be used with these accounts.

ASSIGNMENT FEE: A one-time fee will be charged for every new Number at the time
activated by Customer. This fee varies based upon the number of End Users active
on AT&T's Service as of the end of the month.

<TABLE>
<CAPTION>
        Number of Active End Users                        Assignment Fee
        --------------------------                        --------------
<S>                                                       <C>
                    0 - 10,000                                 $5.00
               10,001 - 30,000                                 $5.00
               30,001 - 50,000                                 $3.00
               50,001 - 100,000                                $2.50
               100,001 +                                       $0.00
</TABLE>

CANCELLATION FEE: No cancellation fee will be assessed upon deactivation of
Numbers.

BILLING GUIDELINES:

                                      -22-

<PAGE>   24

        1.      General. AT&T will bill Customer on a monthly basis for Service
                furnished under this Agreement, including regular monthly
                Service charges and usage charges for all data transmissions
                processed through the Number. Usage charges include charges on a
                per kilobyte basis for transmissions that are sent or received
                by Wireless Data Units programmed with a Number assigned to
                Customer. Usage charges may also include charges for additional
                services offered by AT&T which Customer may subscribe to at
                rates determined by AT&T from time to time.

        2.      Access Charges. Access charges are billed monthly in arrears.
                Usage charges are billed monthly in arrears. If AT&T agrees to
                provide Service features to Customer, AT&T reserves the right to
                charge a reasonable fee for adding or deleting Service features.

        3.      Measurement. The measurement of a transmission is in kilobytes.

        4.      Discounts. All volume and off peak discounts will be applied to
                Customer's Account for the current billing cycle.

        5.      Additional Charges: State surcharges may be charged to Customer
                in addition to the charges under all Rate Plans.

        6.      Loss of Registration. Registration may be "lost" (i.e.,
                involuntarily disconnected) for a variety of reasons, including
                atmospheric conditions, topography, weak batteries, system over
                capacity, movement outside a service area, and gaps in coverage
                within a service area. Loss of registration may result in
                retransmissions and additional usage charges.

MINIMUM NUMBER REQUIREMENTS: Customer shall maintain, within nine months of the
date of this Agreement, a minimum of 30,000 active Numbers.

FAILURE TO MEET MINIMUM NUMBER REQUIREMENTS: In the event Customer fails to
achieve the minimum Number requirements at any time after the dates set forth in
this Exhibit C, Customer shall pay to AT&T in addition to all other amounts due
the difference between Customer's actual Numbers and the required minimum
Numbers times $5 for each month in which Customer fails to achieve such
minimum. Continued failure to meet Minimum Number Requirements shall give rise
to AT&T's right to terminate under Section 10.2

                                      -23-

<PAGE>   25

                                    EXHIBIT D

                              END USER DISCLOSURES

1. [END USER] EXPRESSLY UNDERSTANDS AND AGREES THAT IT HAS NO CONTRACTUAL
RELATIONSHIP WHATSOEVER WITH THE UNDERLYING WIRELESS SERVICE CARRIER AND THAT
[END USER] IS NOT A THIRD PARTY BENEFICIARY OF ANY AGREEMENT BETWEEN [CUSTOMER]
AND UNDERLYING CARRIER. IN ADDITION, [END USER] EXPRESSLY UNDERSTANDS AND AGREES
THAT THE UNDERLYING CARRIER SHALL HAVE NO LEGAL, EQUITABLE, OR OTHER LIABILITY
OF ANY KIND TO [END USER]. IN ANY EVENT, REGARDLESS OF THE FORM OF THE ACTION,
WHETHER FOR BREACH OF CONTRACT, WARRANTY, NEGLIGENCE, STRICT LIABILITY IN TORT
OR OTHERWISE, [END USER's] EXCLUSIVE REMEDY AND THE TOTAL LIABILITY OF THE
UNDERLYING CARRIER ARISING IN ANY WAY IN CONNECTION WITH THIS AGREEMENT, FOR ANY
CAUSE WHATSOEVER, INCLUDING BUT NOT LIMITED TO ANY FAILURE OR DISRUPTION OF
SERVICE PROVIDED HEREUNDER, IS LIMITED TO PAYMENT OF DAMAGES IN AN AMOUNT NOT TO
EXCEED THE AMOUNT PAID BY [CUSTOMER] TO [THE UNDERLYING CARRIER] FOR THE
SERVICES DURING THE TWO MONTH PERIOD PRECEDING THE DATE THE CLAIM AROSE.

2. [END USER] SHALL INDEMNIFY AND HOLD HARMLESS THE UNDERLYING WIRELESS SERVICE
CARRIER SUPPLYING SERVICES TO [CUSTOMER] AND ITS OFFICERS, EMPLOYEES, AND AGENTS
AGAINST ANY AN ALL CLAIMS, INCLUDING WITHOUT LIMITATION CLAIMS FOR LIBEL,
SLANDER, OR ANY PROPERTY DAMAGE, PERSONAL INJURY OR DEATH, ARISING IN ANY WAY
DIRECTLY OR INDIRECTLY IN CONNECTION WITH THIS AGREEMENT OR THE USE, FAILURE TO
USE, OR INABILITY TO USE THE NUMBER EXCEPT WHERE THE CLAIMS RESULT FROM THE
UNDERLYING CARRIER'S GROSS NEGLIGENCE OR WILLFUL MISCONDUCT. THIS INDEMNITY
SHALL SURVIVE THE TERMINATION OF THE AGREEMENT.

3. [END USER] HAS NO PROPERTY RIGHT IN ANY NUMBER ASSIGNED TO IT, AND
UNDERSTANDS THAT ANY SUCH NUMBER CAN BE CHANGED FROM TIME TO TIME.

4. [END USER] UNDERSTANDS THAT [CUSTOMER] AND THE UNDERLYING CARRIER CANNOT
GUARANTY THE SECURITY OF DATA TRANSMISSIONS, AND WILL NOT BE LIABLE FOR ANY LACK
OF SECURITY RELATING TO THE USE OF THE SERVICES OR THE TRANSMISSION OF DATA.

                                      -24-<PAGE>   1
                                                                   EXHIBIT 10.13

                                SUPPLY AGREEMENT

This Supply Agreement ("Agreement") is entered by and between TELLUS TECHNOLOGY
INCORPORATED ("Tellus"), having its principal place of business at 40990
Encyclopedia Circle, Fremont, California 94538-2470, United States of America,
and OMNISKY, INC. ("OmniSky"), having its principal offices at 1001 Elwell
Court, Palo Alto, CA 94303, United States of America. Tellus and OmniSky
collectively may be referred to herein as the "Parties".

This Agreement consists of the Terms & Conditions below and any Appendices as
may be attached.

RECITALS

WHEREAS Tellus is developing a CDPD Springboard Module for use with the
Handspring Visor designated the Tellus V230C and hereinafter referred to as the
"Product";

WHEREAS OmniSky wishes to have manufactured and supplied the Product developed
by Tellus with the assistance of OmniSky; and

WHEREAS OmniSky wishes to have manufactured and supply such Product to OmniSky.

AGREEMENT

In consideration of the above recitals, Tellus and OmniSky hereby agree that
upon signing of this Agreement, Tellus will supply the Product to OmniSky
according to the following terms and conditions:

ARTICLE 1. PRICING
--------------------------------------------------------------------------------

(a)    The Product shall be priced at $[***] per unit and shall be delivered
       prior to [***].

(b)    Prices are quoted FCA/FOB Tellus Dock, Fremont, CA. Price includes the
       Module, [***] of [***], rechargeable battery and a power cord. Additional
       memory is available and shall be priced at the time an order is placed.

ARTICLE 2. PRODUCT SUPPLY, PRODUCT ACCEPTANCE AND TERMINATION
--------------------------------------------------------------------------------

(a)    Tellus shall manufacture, or cause to have manufactured, the Product to
       the preliminary specifications included in Appendix 1 hereto which may be
       amended from time to time. The specifications will be finalized after
       delivery to Tellus of a Product acceptance letter by OmniSky.

(b)    In the event that OmniSky does not issue a Product acceptance letter
       after testing or arranging to have tested an engineering prototype of the
       Product against the Engineering Prototype Product Acceptance Test
       provided for in Appendix 2 hereto on or prior to July

[***] Confidential treatment has been requested for the bracketed portions. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                       1

<PAGE>   2
31, 2000 or such other date as the parties shall mutually agree, then this
Agreement shall immediately terminate.

ARTICLE 3  PURCHASE ORDERS, SHIPMENT, DELIVERY AND ACCEPTANCE
-------------------------------------------------------------------------------

     (a)  OmniSky shall place a purchase order for 25,000 units of Product
          within 3 days of signing this Agreement. Orders for the first 10,000
          units of Product are non-cancelable except as provided for in Article
          2(b). The remaining 15,000 units of Product may not be canceled within
          sixty (60) days prior to Tellus' committed delivery date. The
          anticipated delivery dates for the first 10,000 units of Product are
          prior to [***] and for the remaining 15,000 units of product are prior
          to [***].  Definitive delivery schedules will be determined after
          delivery of the Product acceptance letter by OmniSky.

     (b)  The purchase order shall contain the following information.

          i.   OmniSky's purchase order number;
          ii.  The quantity of Product ordered;
          iii. The unit and price applicable thereto;
          iv.  The destination address(es) for shipping the Product;
          v.   Delivery schedule and shipping instructions.

     (c)  Deliveries are not permitted to be rescheduled less than sixty (60)
          days prior to a Tellus' committed shipment date and are not permitted
          to be rescheduled in quantities greater than 20% of any scheduled
          delivery. Orders may not be rescheduled for delivery more than sixty
          (60) days beyond the original delivery date, and may not be
          rescheduled more than once.

     (d)  In the event OmniSky cancels the purchase of any units of product more
          than 60 days prior to the committed delivery date, OmniSky shall be
          liable for penalties as follows:  between 60 and 120 days, 50% of the
          purchase order dollar value of the units of product cancelled; and 120
          days or greater, 30% of the purchase order dollar value for the units
          of product cancelled.

     (e)  All Product purchased under this Agreement shall be shipped from
          Tellus' Dock in Fremont, CA and shall be shipped to the destination(s)
          specified by OmniSky on OmniSky's account, so as to be received,
          allowing for normal transit times, in accordance with the delivery
          schedule specified on the corresponding Purchase Order.

     (f)  OmniSky shall have five (5) business days after delivery to accept or
          reject any delivery. A shipment will be deemed "Accepted" when less
          than 2% of the units of Product fail the Delivery Acceptance Test that
          shall be mutually agreed to by the Parties in conjunction with the
          finalization of the Product Specifications. A shipment shall be deemed
          "Rejected" when 2% or more of the units of Product fail the Delivery
          Acceptance Test. In that event, Tellus shall take the necessary
          actions, at Tellus's sole expense and discretion, to remedy the
          identified problems and re-submit the shipment for acceptance testing.

[***] Confidential treatment has been requested for the bracketed portions. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.

                                       2

<PAGE>   3
ARTICLE 4.     PAYMENTS
--------------------------------------------------------------------------------

     (a)  Payment for all Product purchased shall be as follows:

          i.   Payment for the first 10,000 units must be made by OmniSky
               immediately upon OmniSky's delivery of a Product acceptance
               letter to Tellus.

          ii.  Payment for the remaining 15,000 units shall be Net 30 days
               except otherwise described in this Agreement.

     (b)  Invoices issued to OmniSky by Tellus shall be in writing and shall
          contain the following information: OmniSky's purchase order number; a
          description of the Product shipped, including serial numbers; the
          quantity of Product shipped; and the unit and extended price
          applicable thereto.

     (c)  Any payments due hereunder are to be made in U.S. dollars. For any
          payment made more than ten (10) days after the due date, a late charge
          shall be imposed at an interest rate equal to the lesser of one and
          one half percent (1.5%) per month. The late charge will accrue from
          the due date of such payment until the date of actual payment.

     (d)  All payments shall be net of all taxes, governmental withholding or
          other offsets.

     (e)  Payments shall be made by write transfer to such bank in the United
          States as Tellus may designate in writing.

ARTICLE 5   WARRANTY AND PRODUCT LIABILITY
--------------------------------------------------------------------------------

     (a)  Tellus warrants that all Product will conform to the Specifications
          and be free from defects in material or workmanship for fourteen (14)
          months from the date of shipment to OmniSky. Claims for Product not
          complying with this warranty shall be submitted by OmniSky no later
          than fifteen (15) months from the date of delivery of the
          non-complying Product. Tellus' obligations, and OmniSky's sole remedy,
          under this warranty shall be for Tellus, at its option and expense, to
          promptly repair or replace non-complying Product, or pay OmniSky its
          costs of remedying such non-compliance. The shipment of non-complying
          Product by OmniSky to Tellus shall be at the expense of OmniSky, and
          the return shipment of repaired or replacement Product by Tellus to
          OmniSky under this Article 5(a) shall be at the expense of Tellus.
          Nevertheless, if the damage or malfunction is caused by the improper
          handling or operation of the end users or OmniSky, or is caused by any
          rework or material changes that have been performed by any other
          parties rather than Tellus or Tellus designees, then Tellus shall not
          be liable.

     (b)  No Defect Found (NDF) is herein defined as for those Product in any
          event that have been provided by Tellus to OmniSky and then been
          claimed by OmniSky or any end users as non-complying Product and
          returned to Tellus thereafter for repair or replacement but of

                                       3
<PAGE>   4
     which Tellus finds no defect. All the repair and replacement for NDF
     Product, including without limitation all relevant costs of transportation
     and documentation and all related engineering work and materials, shall be
     the responsibility of Tellus for the first 0.25% of aggregate shipments and
     shall be the responsibility of OmniSky for all NDF Product above 0.25% of
     aggregate shipments. In the event that OmniSky and Tellus, after testing
     all such NDF Product, disagree on such designation, then the Parties shall
     mutually agree on an independent third party to test all such disputed
     units and such independent third party's test results shall be accepted
     without challenge by the Parties.

(c)  During the term of this Agreement, Tellus shall maintain in force product
     liability insurance on the Product.

(d)  EXCEPT AS EXPRESSLY SET FORTH IN THIS ARTICLE 5, TELLUS MAKES NO
     WARRANTIES, EXPRESS OR IMPLIED, AND SPECIFICALLY DISCLAIMS ANY WARRANTIES
     OF MERCHANTABILITY, NONINFRINGEMENT OR FITNESS FOR A PARTICULAR PURPOSE.

ARTICLE 6 ENGINEERING CHANGES; OUT OF WARRANT REPAIR
--------------------------------------------------------------------------------
(a)  Tellus agrees to repair any out-of-warranty Product that OmniSky may elect
     to have repaired by Tellus and which Tellus deems repairable for a period
     of at least one (1) year following the termination of this Agreement. The
     cost to OmniSky for such repair by Tellus shall be negotiated at the time
     of order placement but will not exceed the original price for the Product
     plus actual material cost required for the repair.

(b)  Any upgrades or engineering changes after the delivery of Product to
     OmniSky are the responsibility of OmniSky. Should these upgrades,
     engineering changes or rework be performed by Tellus upon the request of
     OmniSky, OmniSky shall bear the cost of transportation, documentation and
     all related engineering work and material necessary in accordance with
     Tellus' regular time and materials rates.

ARTICLE 7 INDEMNITIES
--------------------------------------------------------------------------------
(a)  INDEMNIFICATION BY TELLUS. Tellus shall defend, indemnify and hold harmless
     OmniSky and its officers, directors, employees, shareholders, customers,
     agents, successors and assigns from and against any and all loss, damage,
     settlement, costs or expense (including legal expenses), as incurred,
     resulting from, or arising out of (i) any breach of this Agreement by
     Tellus; and (ii) any claim, suit or proceeding brought against OmniSky
     which alleges that the Tellus Intellectual Property Rights and/or Tellus
     Know-How infringe upon, misappropriates or violates any patents,
     copyrights, trademarks or trade secret rights or other proprietary rights
     of persons, firms or entities who are not parties to this Agreement where
     such unlawful activity is completely independent of the Product. As a
     condition to such defense, OmniSky will provide Tellus with prompt written
     notice of the claim and permit Tellus to control the defense, settlement,
     adjustment or compromise of any such claim. OmniSky may employ counsel at
     its own expense to assist it with respect

                                       4
<PAGE>   5
     to any such claim; provided, however, that if such counsel is necessary
     because of a conflict of interest of either Tellus or its counsel or
     because Tellus does not assume control, Tellus will bear the expense of
     such counsel. OmniSky shall have no authority to settle any claim on behalf
     of Tellus.

(b)  Tellus shall have no obligation under subsection (a)(ii) above to the
     extent any claim of infringement or misappropriation results from: (i) use
     of the Product in combination with any other Product, end item, or
     subassembly if the infringement would not have occurred but for such
     combination; (ii) use or incorporation in the Product of any design,
     technique or specification furnished by OmniSky, if the infringement would
     not have occurred but for such incorporation or use; or (iii) any claim
     based on OmniSky's use of the Product as shipped after Tellus has informed
     the OmniSky of modifications or changes in the Product required to avoid
     such claims and offered to implement those modifications or changes, if
     such claim would have been avoided by implementation of Tellus'
     suggestions. Tellus shall not be liable hereunder for enhanced or punitive
     damages which could have been avoided or reduced by actions within the
     control of OmniSky.

(c)  THE FOREGOING PROVISIONS OF THIS ARTICLE 7(a) and 7(b) STATE THE ENTIRE
     LIABILITY AND OBLIGATIONS OF TELLUS AND THE EXCLUSIVE REMEDY OF OMNISKY AND
     ITS CUSTOMERS, WITH RESPECT TO ANY VIOLATION OR INFRINGEMENT OF PROPRIETARY
     RIGHTS, INCLUDING BUT NOT LIMITED TO ANY PATENT, COPYRIGHT, TRADEMARK, BY
     THE PRODUCT OR ANY PART THEREOF. TELLUS'S OBLIGATIONS UNDER THIS ARTICLE 7
     ARE SUBJECT TO THE LIMITATIONS SET FORTH IN ARTICLE 8.

(d)  INDEMNIFICATION BY OMNISKY. Omnisky shall defend, indemnify and hold
     harmless Tellus and its officers, directors, employees, shareholders,
     customers, agents, successors and assigns from and against any and all
     loss, damage, settlement, costs or expense (including legal expenses), as
     incurred, resulting from, or arising out of (i) any breach of this
     Agreement by OmniSky; and (ii) any claim, suit or proceeding brought
     against Tellus which alleges that the OmniSky Intellectual Property Rights
     and/or OmniSky Know-How infringe upon, misappropriates or violates any
     patents, copyrights, trademarks or trade secret rights or other proprietary
     rights of persons, firms or entities who are not parties to this Agreement
     where such unlawful activity is completely independent of the Product. As a
     condition to such defense and indemnification, Tellus will provide OmniSky
     with prompt written notice of the claim and permit OmniSky to control the
     defense, settlement, adjustment or compromise of any such claim. Tellus may
     employ counsel at its own expense to assist it with respect to any such
     claim; provided, however, that if such counsel is necessary because of a
     conflict of interest of either OmniSky or its counsel or because OmniSky
     does not assume control, OmniSky will bear the expense of such counsel.
     Tellus shall have no authority to settle any claim on behalf of OmniSky.

(e)  THE FOREGOING PROVISIONS OF THIS ARTICLE 7(d) and 7(e) STATE THE ENTIRE
     LIABILITY AND OBLIGATIONS OF OMNISKY AND THE EXCLUSIVE REMEDY OF TELLUS AND
     ITS CUSTOMERS, WITH RESPECT TO ANY VIOLATION OR INFRINGEMENT OF PROPRIETARY
     RIGHTS, INCLUDING BUT NOT LIMITED TO ANY PATENT, COPYRIGHT, TRADEMARK, BY
     THE PRODUCT

                                       5
<PAGE>   6
     OR ANY PART THEREOF. OMNISKY'S OBLIGATIONS UNDER THIS ARTICLE 7 ARE
     SUBJECT TO THE LIMITATIONS SET FORTH IN ARTICLE 8.

ARTICLE 8 LIMITATION OF LIABILITY AND EXCLUSION OF CERTAIN DAMAGES

(a)  IN NO EVENT SHALL TELLUS BE LIABLE FOR ANY INDIRECT, SPECIAL OR
     CONSEQUENTIAL DAMAGES OF ANY NATURE OR KIND WHATSOEVER, INCLUDING BUT NOT
     LIMITED TO, LOSS OF PROFITS, LOSS OF BUSINESS, OR COST OF PROCUREMENT OF
     SUBSTITUTE GOODS OR SERVICES, ARISING OUT OF OR RELATING TO THIS AGREEMENT
     OR THE PROVISION OF PRODUCT HEREUNDER, OR OMNISKY'S USE OR DISTRIBUTION
     THEREOF.

(b)  TELLUS' LIABILITY FOR DAMAGES HEREUNDER, INCLUDING ANY PAYMENTS MADE OR
     EXPENSES INCURRED, IF ANY SHALL NOT EXCEED IN THE AGGREGATE THE AMOUNTS
     PAID BY OMNISKY TO TELLUS HEREUNDER.

(c)  IN NO EVENT SHALL OMNISKY BE LIABLE FOR ANY INDIRECT, SPECIAL OR
     CONSEQUENTIAL DAMAGES OF ANY NATURE OR KIND WHATSOEVER, INCLUDING BUT NOT
     LIMITED TO, LOSS OF PROFITS, OR LOSS OF BUSINESS ARISING OUT OF OR RELATING
     TO THIS AGREEMENT.

ARTICLE 9 CONFIDENTIAL RELATIONSHIP

(a)  Tellus and OmniSky (on behalf of themselves and their respective officers,
     employees and agents) shall use all reasonable efforts to keep confidential
     all Confidential Information acquired from the other Party, whether prior
     to or during the term of this Agreement, except as disclosure or use of
     such information is expressly permitted by this Agreement or by a writing
     signed by the Parties hereto. The term "Confidential Information" shall
     include all licensed technology, the terms and conditions of this
     Agreement, and any other information, technical data, know-how or show-how
     relating to the Product and maintained in confidence by a Party and
     disclosed to the other Party hereunder. All such Confidential Information
     shall be designated in writing by the disclosing Party as "confidential" or
     "proprietary" or, if disclosed orally, shall be designated as Confidential
     Information in writing forwarded to the receiving Party by the disclosing
     Party within thirty (30) days of the date of oral disclosure.
     Notwithstanding the foregoing, Confidential Information does not include
     any such information, technical data or know-how which:

     (i)   is or becomes part of the public domain without violation of this
           Agreement:

     (ii)  is known and on record at a receiving party prior to disclosure by
           the disclosing party;

     (iii) is lawfully received from a third party without restriction; or

     (iv)  is developed by a receiving party completely independently and
           without use of the disclosing party's Confidential Information.

                                       6
<PAGE>   7
     Each Party agrees to maintain all written materials and comments relating
     to or containing Confidential Information obtained from the other Party
     (including all schematics sketches, drawings, reports and notes, and all
     copies and reproductions thereof) in confidence and to designate in writing
     the secret and confidential nature thereof and to use all necessary efforts
     to prevent the unauthorized use or reproduction thereof, including
     restriction of the disclosure to its employees of only such Confidential
     Information as is necessary to such employee's responsibilities in
     performing the acts required or contemplated by this Agreement.
     Notwithstanding the foregoing, with the prior written consent of the other
     Party either Party may disclose the existence of a vendor-customer
     relationship between the Parties, provided that such disclosing Party does
     not reveal the terms of this Agreement.

(b)  Each Party acknowledges that in the event it breaches any of the provisions
     of this Article 9, the other Party may be irreparably harmed and may not
     have an adequate remedy at law. In the event of any breach or threatened
     breach of this Article 9, each Party shall be entitled to injunctive relief
     to enforce its rights hereunder, without being required to post any bond or
     other property.

(c)  The obligations of the Parties under this Article 9 shall survive the term
     and termination of this Agreement for a period of five (5) years and shall
     remain in full force and effect regardless of the cause of any termination.

ARTICLE 10.    ADDITIONAL CLAUSES

(a)  Interpretation. This Agreement shall be governed and construed in
     accordance with the laws of the State of California in the United States of
     America, including the California Commercial Code.

(b)  Export Law. Both parties will comply with all import and export laws of the
     United States of America.

(c)  Order of Precedence. Any export agreement entered into with the U.S.
     Government with respect to the subject matter hereof will have precedence
     over the terms and condition of this Agreement.

(d)  Entire Agreement. Except as provided in Article 10(c), this Agreement
     constitutes the entire Agreement between the Parties and supersedes any
     prior written or oral agreement or understanding with respect to the
     subject matter hereof.

(e)  Assignment. Neither party shall assign this Agreement, or any rights
     hereunder, to any third party, including an affiliated company or any
     successor who acquires substantially all of its assets and business,
     without the prior written consent of the other party, which in the case of
     an affiliated company in which OmniSky has at least a 20% equity interest
     or a successor shall only be withheld in the situation where the other
     party is reasonably construed to have a conflicting business relationship
     with such third party.

                                       7
<PAGE>   8
(f)  Waiver. The waiver of a breach or default hereunder shall not constitute
     the waiver of any subsequent breach or default.

(g)  Invalidity of Provisions. Should any provision of this agreement be
     invalid, such invalidity will not affect the validity of the remaining
     provisions.

(h)  Legal Fees. The prevailing Party in any legal action brought by one Party
     against the other shall be entitled, in addition to any other rights and
     remedies it may have, to reimbursement for its reasonable expenses incurred
     thereby, including actual court costs and reasonable attorneys' fees.

(i)  Notices. All notices or other communications required or permitted
     hereunder shall be in English and shall be deemed communicated on the date
     received at the address set forth below, or at such other address as to
     which such party shall give written notice hereunder. In the absence of
     specific notification, acceptance of any notice shall be deemed to have
     occurred ten (10) days after being communicated.

     TELLUS TECHNOLOGY INC.           OMNISKY SYSTEMS INC.
     Attention: Sales Manager         Attention: Jorge Pont, Product Manager
     40990 Encyclopedia Circle        101 Elwell Court
     Fremont, CA 94538-2470, USA      Palo Alto, CA 94306
     Phone # +1 (510) 498 8500        Phone # +1-(650) 962-4308
     Fax #   +1 (510) 498 8540        Fax #   +1-(650) 962-4500

(j)  Agency. Nothing contained in this Agreement is intended or shall be
     construed so as to constitute the Parties as partners, joint ventures or
     agents of each other.

(k)  Arbitration. All disputes arising out of or in connection with this
     Agreement shall be finally settled by binding arbitration conducted under
     the then existing Commercial Arbitration Rules of the American Arbitration
     Association by a single arbitrator appointed in accordance with such Rules.
     The place of the arbitration shall be San Francisco, California, USA and
     the arbitration proceedings shall be conducted in the English language.
     Judgment upon awards or orders for enforcement may be entered by all courts
     to which an award is presented and execution may be had in accordance with
     the law of execution generally applied in the countries where enforcement
     is sought.

(l)  Survival. The provisions of Articles 5, 6, 7, 8, 9 and the relevant
     provisions of this Article 10, together with any OmniSky payment
     obligations, shall survive the termination of this Agreement.

(m)  Force Majeure. Nonperformance (except for the need to make payments) by
     either Party shall be excused to the extent that performance is rendered
     impossible by strike, fire, flood, earthquake, governmental acts or orders
     or restrictions, failure of suppliers, or any other reason where failure to
     perform is beyond the control of and not caused by the negligence of the
     non-performing Party.

                                       8
<PAGE>   9

                                       9
<PAGE>   10
IN WITNESS WHEREOF, the parties have caused this Agreement to be executed by
and through their duly authorized representatives on the dates specified below.

TELLUS TECHNOLOGY INC.                       OMNISKY, INC.

/s/ GREGORY S. ELLIS                         /s/ BARAK BERKOWITZ
----------------------------                 ----------------------------
Signature                                    Signature

Gregory S. Ellis                             Barak Berkowitz
----------------------------                 ----------------------------
Name (Print)                                 Name (Print)

VP, Bus Dev                                  President
----------------------------                 ----------------------------
Title (Print)                                Title (Print)

11 May 00
----------------------------                 ----------------------------
Date                                         Date

                                       10

<PAGE>   11
                                   APPENDIX 1

                           PRELIMINARY SPECIFICATIONS

1.    SYSTEM

CDPD Device containing RF and Firmware compliant with CDPD 1.1 specifications
and a physical interface compatible with Handspring Springboard module
specification.

2.    HARDWARE

ENCLOSURE

Plastic Material TBD

Color/Texture TBD

Logos: Embossed OS logo on front and back of unit

Maximum Dimensions in mm are:

54.5mm wide
73.20 tall (from the connector to the antenna boss)
27.5mm thick

POWER SOURCE

The V230 will run primarily from its own internal rechargeable LI battery, for 1
day of use under normal conditions. Normal conditions are defined as power on
for 12 hours with 90% sleep mode, 7% receiving, and 3% transmitting. A secondary
power source will be a travel charger that plugs into the serial port at the
bottom of the Visor. A third power source is expected to be the optional
recharging/docking cradle that will be available from Handspring.

MEMORY

The device will contain [***] as its standard configuration (Must accommodate 2,
4 or 8 MB package). A [***] configuration will be available at the time of
ordering. Flash contains software drivers, configuration tool, and customer
supplied software if any.

BUTTONS & CONTROLS

There will be a on off switch in the form of a button on the top of the unit
that powers the unit up or down when depressed for several seconds. Actual
duration to be depressed TBD. The power button will have a second function, to
be controlled by software, that when depressed will launch a particular
application.

[***] Confidential treatment has been requested for the bracketed portions. The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.
<PAGE>   12

LEDS

There will be 4 LEDs on the V230 indicating the follwing:

o    Network Connectivity

o    Transmitting

o    Battery

o    Message Waiting

BATTERY

The battery will be a single cell prismatic LI battery with a minimum capacity
of 900 mAh. The battery will have a built in safety will attach to the PCB with
a connector. Units will be built with a 1000-1200 mAh battery that have
dimensions in mm of 48 x 33 x 8.5.

It is anticipated that within 6 months, a transition can be made to a 800 mAh
battery that will have a thickness of 6mm.

I/O CONNECTORS

The V230C interface to the Visor is a standard PCMCIA connector without the
actual PCMCIA interface.

ANTENNA

The V230 has a fixed 1/4 wave antenna (non detachable) that extends beyond the
module footprint both to allow separation from the Visor and provide for good
reception. This can be stowed while attached without substantially increasing
the size of the device. The antenna must have 2 axis of motion so that it can
point up while held in the hand or while on a table top.

The gain of the antenna is at least 0 dBi and no more than 4.7 dBi. The concept
of an integrated patch antenna on a chip is attractive but needs
experimentation before it can be released for commercial sale.

The antenna should also be rugged and durable, difficult to break and robust in
a medium shock environment and tolerant of being bent.

POWER CONSUMPTION

5V DC

o    Sleep Mode - Less than 20mA

o    Receive-only Mode - 230mA

o    Transmit Mode - per specification

AGENCY MARKINGS

The V230 will meets all applicable FCC and Industry Canada emissions and health
regulations and will be so marked on the underside label.

<PAGE>   13

3.   TELLUS SOFTWARE

All software to operate and drive the V230 is contained on the V230 module
itself. When the module is plugged in to the Visor, the Visor detects the
module, loads the application on the Visor and then cleanly and safely removes
the application from the Visor as the module is deinstalled. The following
software must include the following:

DRIVER

Palm OS Compatible

CONFIGURATION TOOL

The elements of the configuration will be determined. At a minimum, there
should be 10 screens showing the following:

-    Window 1 - Basic Indicators

     -    RSSI

     -    Fuel Gage

     -    Service Provider

     -    RF Channel Number

     -    User defined parameters

-    Window 2 - Setup

     -    Network Selection

     -    Device Configuration

     -    Modem Configuration

-    Window 3 - Preferences

     -    Service Provider

     -    Password

-    Window 4 - Configuration

     -    NEI

     -    Primary DNS

     -    Secondary DNS

     -    Sleep Control

     -    Power Management Controls

     -    Network Provider

     -    SPNI

     -    Channel Hotlist

<PAGE>   14
                                   APPENDIX 2

                 ENGINEERING PROTOTYPE PRODUCT ACCEPTANCE TEST

The acceptance of the Engineering Prototype Product will be based on a LIMITED
Part 409 test.

Part 409 is part of the CDPD 1.1 Specification as published by the CDPD Forum
dated January 19, 1995 that "details definitions, methods of measurement and
minimum performance requirements" of CDPD mobile end stations ("M-ES") such as
the Tellus V230C.

Passing this test assures that the Product will obtain service in any CDPD
system that meets the compatibility requirements of the Standard.
Compatibility is understood to mean "any mobile station is able to establish
communications in any CDPD system in which it is authorized. Conversely, all
CDPD mobile data base stations are able to establish communications with any
M-ES."

The parameters to be tested include:

     Adjacent and Alternate Channel Selectivity
     RSSI
     RX BLER
     RX Sensitivity
     TX Power Level

Demonstrated compliance on the above parameters with Part 409 of the CDPD 1.1
Specification shall be considered as "acceptable".

In addition, Tellus will demonstrate the Engineering Prototype Product both
seated in the Visor Springboard expansion slot and attached by an extended cable
to the Visor. This demonstration will consist of FTP or E-mail
transmission/reception of files in two sizes: 10k and 100k.

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