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                                                                    Exhibit 10.7

PURCHASE AND LICENSE AGREEMENT                            [NORTEL NETWORKS LOGO]

This Purchase and License Agreement ("Purchase and License Agreement") is
between Nortel Networks Inc. ("Nortel Networks") and Triton PCS Equipment
Company L.L.C. ("Triton PCS") effective as of the last date signed. Additional
terms related to Triton PCS's purchase or license of Products or Services may be
added by written agreements ("Supplements") referencing the Purchase and License
Agreement, collectively referred to as the "Agreement". The Services Supplement
is attached hereto and incorporated by reference. Unless otherwise terminated in
accordance with the terms hereof, this Agreement will commence on the last date
signed and terminate three (3) years there from.

1. DEFINITIONS

a) "Furnish-only" means Products that Triton PCS installs.

b) "Hardware" means a Nortel Networks machine or components.

c) "Products" are any Hardware, Software or Third Party Vendor Items provided
under this Agreement.

d) "Services" means the activities to be undertaken by Nortel Networks pursuant
to an Order, including, but not limited to, engineering, maintenance and
installation, implementation, design, consulting, business planning, network
planning and analysis.

e) "Software" is owned or licensed by Nortel Networks, its parent or one of its
subsidiaries or affiliates, and is copyrighted and licensed, not sold. Software
consists of machine-readable instructions, its components, data, audio-visual
content (such as images, text, recordings or pictures) and related licensed
materials including all whole or partial copies.

f) "Third Party Vendor Item" includes "Third Party Hardware" and "Third Party
Software" and means any non-Nortel Networks hardware and/or software supplied to
Triton PCS under this Agreement.

2. ORDERS

Triton PCS may acquire Products or Services by issuing a written purchase order
signed by an authorized representative or, if Triton PCS is enrolled in any then
current Nortel Networks' electronic commerce program, by submitting electronic
orders (collectively, "Orders"). All Orders shall reference this Agreement and
specify the quantity, price, Nortel Networks quotation number, shipping and
billing instructions, installation location, delivery dates, commencement date
for Services, any statement of work, and any other special instructions. All
Orders will be governed by and cannot alter the terms and conditions of this
Agreement. Nortel Networks' written or electronic communication accepting the
Order, shipment of Products or commencement of Services will be Nortel Networks'
acceptance of Triton PCS's Order.

3. ELECTRONIC COMMERCE PROGRAMS

By enrolling in any Nortel Networks' electronic commerce program, Triton PCS
agrees to comply with the terms of such program. Triton PCS agrees that all
electronic Orders issued are equivalent to a written Order, are governed by the
terms and conditions of this Agreement and that in the event of any conflict
between this Agreement and the information contained in Triton PCS's or Nortel
Networks' electronic commerce website, this Agreement governs. Triton PCS is
responsible for the use and protection of all electronic commerce passcodes
provided by Nortel Networks and agrees that all Orders submitted using such
passcodes are valid and binding Orders authorized by Triton PCS. Nortel Networks
shall have no liability to Triton PCS due to Triton PCS's failure to access
Triton PCS's or Nortel Networks' electronic commerce website or errors or
failures relating to its operation.

4. LICENSED USE OF SOFTWARE

Nortel Networks grants Triton PCS a nonexclusive license to use a copy of the
Software to the extent of the activation or authorized usage level. To the
extent Software is furnished for use with designated Products or Triton PCS
furnished equipment ("CFE"), Triton PCS is granted a nonexclusive license to use
Software only on such Products or CFE, as applicable. Software contains trade
secrets and Triton PCS agrees to treat Software as Information. Triton PCS will
ensure that anyone who uses the Software does so only in compliance with the
terms of this Agreement. Triton PCS shall not a) use, copy, modify, transfer or
distribute the Software except as expressly authorized; b) reverse assemble,
reverse compile, reverse engineer or otherwise translate the Software; c) create
derivative works or modifications unless expressly authorized; or d) sublicense,
rent or lease the Software. Third parties who have licensed intellectual
property to Nortel Networks shall be deemed to be beneficiaries of Nortel
Networks' rights under this clause, to the extent that such intellectual
property is included in or is associated with the licensed software. Upon
termination of the license (in accordance with its terms) or breach of the
license (after the expiration of any applicable notice and cure period) by
Triton PCS or in the event designated Product or CFE is no longer in use, Triton
PCS will promptly return the Software to Nortel Networks or certify its
destruction. Nortel Networks may audit by remote polling or other reasonable
means to determine Triton PCS's Software activation or usage levels. With
respect to Third Party Software, Triton PCS agrees to abide by the terms
provided by Nortel Networks with respect to any such software. Triton PCS
further agrees that the terms contained in any third party "shrink wrap" or
"click" licenses shall govern the use of such software.

5. CHARGES AND PAYMENT

Amounts are due upon receipt of invoice and shall be paid by Triton PCS within
30 days. Triton PCS shall pay interest on any late payments at the rate per
annum (charged monthly) equal to the lesser of (i) the Prime Rate plus 1% per
annum or (ii) the maximum rate per annum permissible under applicable law.
"Prime Rate" shall mean the "prime rate" of interest quoted from time to time by
The Wall Street Journal as the base rate on corporate loans made by major United
States money center commercial banks, provided that, in the event that The Wall
Street Journal ceases quoting a "prime rate" of the type described above, "Prime
Rate" shall mean the rate of interest announced publicly from time to time by
Citibank, N.A. as its "base rate" in effect at its principal office in New York,
New York; each change in the Prime Rate shall be effective on the date such
change is published or announced publicly, as applicable, as being effective.
Additional charges for shipping, insurance and special handling shall be quoted
by Nortel Networks and specified in the applicable Order. Charges for

                                 Triton PCS PLA
                            CONFIDENTIAL INFORMATION
                                   Page 1 of 8
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PURCHASE AND LICENSE AGREEMENT                            [NORTEL NETWORKS LOGO]

Software may be based on extent of use authorized as specified authorized level.
If any authority imposes a tax, duty, levy or fee, excluding those based on
Nortel Networks' net or gross income and any franchise or license taxes
applicable to Nortel in a Supplement or invoice. Triton PCS agrees to pay the
charges applicable for any activation or usage beyond the Networks operations,
upon a Product or Service supplied by Nortel Networks under this Agreement,
Triton PCS agrees to pay that amount as specified in the invoice, or supply
exemption documentation. Triton PCS is responsible for personal property taxes
for each Product from the date of receipt at the designated Triton PCS site.
Triton PCS consents without qualification to the sale of receivables, in whole
or in part, including all or any part of any associated rights, remedies, and
obligations, by Nortel Networks without further notice and authorizes the
disclosure of this Purchase and License Agreement and Supplements as necessary
to facilitate such sale.

6. WARRANTY

a) Nortel Networks warrants that Hardware i) is free from defects in materials
and workmanship and ii) substantially conforms to Nortel Networks' published
specifications. If Hardware does not function as warranted during the warranty
period, Nortel Networks will, at its option, either i) make it do so, or ii)
replace it with equivalent Hardware.

b) Nortel Networks warrants that when Software is used in the specified
operating environment it will substantially conform to its published
specifications. If Software does not function as warranted during the warranty
period, Nortel Networks will provide a suitable fix or workaround or will
replace the Software; provided Software is within one software release level of
the then-current software.

c) Services will be performed in a professional and workmanlike manner and will
be free from defects in material and workmanship. If Services are not performed
as warranted and Nortel Networks is notified in writing by Triton PCS within 30
days after completion of Services, Nortel Networks will re-perform the
non-conforming Services.

d) The warranty period for Hardware, Software shall be the warranty period
identified in the Nortel Networks warranty matrix in effect at the time of
Triton PCS's Order or as specified in the applicable Supplement.

In the event Nortel Networks cannot repair or replace the affected Products
using commercially reasonable efforts as set forth in this Section 6 , Nortel
Networks will refund to Triton PCS the price paid for the Product.

e) No warranty is provided for i) supply items normally consumed during Product
operation; ii) failures caused by non-Nortel Networks products; iii) failures
caused by a Product's inability to operate in conjunction with other Triton PCS
hardware or software; or iv) performance failures resulting from services not
performed by Nortel Networks. Warranty will be voided by misuse, accident,
damage or modification, failure to maintain proper physical or operating
environment or improper Triton PCS maintenance. Software is not warranted to
operate uninterrupted or error free. THESE WARRANTIES AND LIMITATIONS ARE TRITON
PCS'S EXCLUSIVE WARRANTIES AND SOLE REMEDIES AND REPLACE ALL OTHER WARRANTIES OR
CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.

f) Nortel Networks provides Third Party Vendor Items on an "AS IS" BASIS WITHOUT
WARRANTIES OF ANY KIND, unless Nortel Networks specifies otherwise. However,
such Third Party Vendor Items may carry their own warranties and Nortel Networks
shall pass through to Triton PCS any such warranties to the extent authorized.
Notwithstanding the foregoing, Nortel will assist Triton PCS with arranging for
warranty services for Third Party Vendor Items.

7. WARRANTY SERVICE

Nortel Networks provides certain types of warranty repair and exchange service,
without charge. Nortel Networks will inform Triton PCS of the types of warranty
services available to Triton PCS consistent with Nortel Networks standard
practices and response times. Nortel Networks Technical Assistance Services
("TAS") are available for warranty repair during the warranty period at no
charge only for specified Products. When Triton PCS is required to return
Hardware to Nortel Networks for warranty service, Triton PCS agrees to ship it,
at Nortel Networks' expense (unless the Hardware is not defective), suitably
packaged to a location Nortel Networks designates, using a carrier designated by
Nortel Networks. Nortel Networks will return the Hardware to Triton PCS at
Nortel Networks' expense. Nortel Networks is responsible for loss of, or damage
to, Triton PCS Hardware while it is a) in Nortel Networks' possession or b) in
transit from or back to Triton PCS. Any returned Hardware becomes Nortel
Networks' property and, subject to Section 8 Title and Risk of Loss, its
replacement becomes Triton PCS's property. The replacement Hardware may not be
new but will be in working order and equivalent to the item exchanged. The
warranty period for any repaired or replaced Hardware or Software shall be the
greater of ***** from the date of repair or replacement or the remaining
Hardware or Software warranty period. Triton PCS agrees to ensure that exchanged
Hardware is free of any legal obligations or restrictions that prevent its
exchange and represents that all returned items are genuine and unaltered. Where
applicable, before Nortel Networks provides warranty services, Triton PCS agrees
to a) follow the problem determination, problem analysis, and warranty services
request procedures that Nortel Networks provides; b) secure all programs and
data contained in Hardware; and c) inform Nortel Networks of changes in the
Hardware's location. Post warranty services may be available at Nortel Networks'
then-current prices.

8. TITLE AND RISK OF LOSS

Title and risk of loss for ordered hardware shall pass from Nortel Networks to
Triton PCS upon receipt by Triton PCS at the specified Triton PCS delivery site.

9. IMPLEMENTATION AND INSTALLATION SERVICES

Triton PCS agrees to provide sufficient, free and safe access to Triton PCS's
facilities and a suitable physical environment meeting Nortel Networks'
specified requirements to permit the timely installation of Products and/or
performance of Services.

                                 Triton PCS PLA
                            CONFIDENTIAL INFORMATION
                                   Page 2 of 8

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
PURCHASE AND LICENSE AGREEMENT                            [NORTEL NETWORKS LOGO]

Nortel Networks will successfully complete the applicable installation,
commissioning and validation procedures before a Product is considered
installed. Nortel Networks may make alterations to any Product and Service as
necessary to comply with specifications, changed safety standards or
governmental regulations, to make a Product non-infringing with respect to any
patent, copyright or other proprietary interest, or to otherwise improve a
Product or Service. Triton PCS is responsible for i) the results obtained from
the use of Products and Services; ii) integration and interconnection with
Triton PCS's hardware and/or third party hardware and/or systems; and iii)
installation of Furnish-only Products.

10. CONFIDENTIAL INFORMATION

a) Confidential information ("Information") means i) Software and Third Party
Software; and ii) all business, technical, marketing and financial information
and data that is clearly marked with a restrictive legend of the disclosing
party ("Discloser").

b) The party receiving Information ("Recipient") will use the same care and
discretion, but not less than reasonable care, to avoid disclosure, publication
or dissemination of Information as it uses with its own similar information that
it does not wish to disclose, publish or disseminate. The Recipient may disclose
Information only to i) its employees and employees of its parent, subsidiary or
affiliated companies who have a need to know for purposes of carrying out this
Agreement; and ii) any other party with the Discloser's prior written consent.
Before disclosure to any of the above parties, the Recipient will have a written
agreement with such party sufficient to require that party to treat Information
in accordance with this Agreement. No party may use any such Information except
in conjunction with such party's performance hereunder

c) The Recipient may disclose Information to the extent required by law
(including SEC or FCC law). However, the Recipient must give the Discloser
prompt notice and make a reasonable effort to obtain a protective order. The
Recipient may disclose Information to the extent required to enforce its rights
hereunder, provided Recipient uses reasonable efforts to protect the
confidentiality of the Information to be disclosed.

d) No obligation of confidentiality applies to any Information that the
Recipient i) already possesses without obligation of confidentiality; ii)
develops independently; or iii) rightfully receives without obligations of
confidentiality from a third party unless the Recipient knows that such third
party is subject to obligations of confidentiality with respect thereto. No
obligation of confidentiality applies to any Information that is, or becomes,
publicly available without breach of this Agreement.

e) The release of any advertising or other publicity relating to this Agreement
requires the prior approval of both parties.

11. PATENTS AND COPYRIGHTS

If a third party claims that Nortel Networks Hardware or Software provided to
Triton PCS under this Agreement infringes or violates that party's United States
or foreign patent, copyright, trademark, trade secret or any other intellectual
property right of any kind, Nortel Networks will defend Triton PCS against that
claim at Nortel Networks' expense and pay all costs and damages that a court
finally awards or are agreed in settlement, provided that Triton PCS a) promptly
notifies Nortel Networks in writing of the claim upon Triton PCS' knowledge
thereof and b) allows Nortel Networks to control, and cooperates (at Nortel
Networks' expense) with Nortel Networks in, the defense and any related
settlement negotiations. (In connection with Triton PCS's efforts to cooperate
in the defense or settlement of any such claim, Nortel Networks shall reimburse
Triton PCS for any amounts paid by Triton PCS to a third party, provided Nortel
approves any such expenditures over $250.00 in advance.). If such a claim is
made or appears likely to be made, Nortel Networks agrees to secure the right
for Triton PCS to continue to use the Hardware or Software, or to modify it, or
to replace it with one that is equivalent. If Nortel Networks determines that
none of these alternatives is reasonably available, Triton PCS agrees to return
the Hardware or Software to Nortel Networks on Nortel Networks' written request.
Nortel Networks will then refund the full amount paid by Triton PCS for any such
Hardware or Software which is returned to Nortel Networks during the three (3)
year term of this Agreement and for any such Hardware and Software so returned
thereafter, will give Triton PCS a credit equal to Triton PCS's net book value
for the Hardware or Software provided Triton PCS has followed generally-accepted
accounting principles. Any such claims against the Triton PCS or liability for
infringement arising from use of the Hardware or Software following a request
for return by Nortel Networks are the sole responsibility of Triton PCS. This
represents Nortel Networks' entire obligation to Triton PCS regarding any claim
of infringement. Nortel Networks has no obligation regarding any claim based on
any of the following: a) anything Triton PCS provides which is incorporated into
the Hardware or Software; b) functionality provided by Nortel Networks in
accordance with Triton PCS specification(s); c) Triton PCS's modification of
Hardware or Software; d) the combination, operation, or use of Hardware or
Software with other products not provided by Nortel Networks as a system, or the
combination, operation, or use of Hardware or Software with any product, data,
or apparatus that Nortel Networks did not provide; or e) infringement by a Third
Party Vendor Item alone, as opposed to its combination with Products Nortel
Networks provides to Triton PCS as a system.

12. INDEMNIFICATION; LIMITATION OF LIABILITY

Each of Nortel Networks and Triton PCS agree to indemnify and hold the other
harmless from and against all losses, claims or demands, for damages to property
or bodily injury (including death) to third parties and causes of action by
third parties (including reasonable legal fees) resulting from the intentional
misconduct or negligent acts or omissions, or strict liability, of it, its
officers, agents, employees, or subcontractors. If Nortel Networks and Triton
PCS jointly cause such losses, claims, demands, damages, or causes of action,
the Parties shall share the liability in proportion to their respective degree
of causal responsibility. In no event shall Nortel Networks or its agents or
suppliers be liable to Triton PCS for any actual direct damages in excess of
***** percent (*****%) of the price paid by Triton PCS for the Product or
Services that are the subject of the claim, regardless of the cause and whether
arising in contract, tort (including negligence) or otherwise. This

                                 Triton PCS PLA
                            CONFIDENTIAL INFORMATION
                                   Page 3 of 8

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>

PURCHASE AND LICENSE AGREEMENT                            [NORTEL NETWORKS LOGO]

limitation will not apply to claims for damages for bodily injury (including
death) and damage to real property and tangible personal property for which
Nortel Networks is legally liable and payments as set forth in Section 11
Patents and Copyrights. With respect to any losses, damages or claims suffered
by Triton PCS (including any third party claims against Triton PCS) for damages
caused to any tangible property owned by Triton PCS, regardless of whether
provided by Nortel Networks or others, that may result from the negligent
performance by Nortel Networks of any professional Services hereunder, or from
the commission of any criminal acts in performance hereunder for which Nortel
Networks is adjudicated guilty, Nortel Networks shall indemnify Triton PCS
against any such losses, damages, claims or demands up to a maximum of *****
percent (*****%) of the total of the prices paid by Triton PCS for Products
ordered hereunder prior to the date of the event giving rise to the claim. IN NO
EVENT SHALL NORTEL NETWORKS OR ITS AGENTS OR SUPPLIERS BE LIABLE FOR ANY OF THE
FOLLOWING: a) DAMAGES BASED ON ANY THIRD PARTY CLAIM EXCEPT AS EXPRESSLY
PROVIDED HEREIN AND IN SECTION 11; b) LOSS OF, OR DAMAGE TO, TRITON PCS'S
RECORDS, FILES OR DATA; OR c) INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE, OR
CONSEQUENTIAL DAMAGES (INCLUDING LOST PROFITS OR SAVINGS), EVEN IF NORTEL
NETWORKS IS INFORMED OF THEIR POSSIBILITY.

13. GENERAL

a) Triton PCS agrees not to assign, or otherwise transfer this Agreement or
Triton PCS's rights under it, or delegate Triton PCS's obligations, without
Nortel Networks' prior written consent, such consent not to be unreasonably
withheld, conditioned or delayed, and any attempt to do so is void; provided,
however, that Triton PCS may assign or transfer this Agreement without the
consent of Nortel Networks (i) to any affiliate of Triton PCS (defined as any
entity which controls, is under the control of, or is under common control with
Triton PCS) or (ii) to any person or entity that acquires, through merger,
purchase or otherwise, all or substantially all of the assets or equity
interests of Triton PCS.. Triton PCS represents and warrants that it is buying
Products and/or Services for its own internal use and not for resale. Triton PCS
agrees to comply in all material respects with all applicable laws including all
applicable export and import laws and regulations. In the event that any
provision of this Agreement or portions thereof are held to be invalid or
unenforceable, the remainder of this Agreement will remain in full force and
effect.

b) The terms and conditions of this Agreement, including any Supplement(s), form
the complete and exclusive agreement between Triton PCS and Nortel Networks and
replace any prior oral or written proposals, correspondence or communications
regarding the subject matter hereof. In the event of a conflict between this
Purchase and License Agreement and a Supplement, the terms in any Supplement(s)
prevail. Any changes to this Agreement must be made by mutual agreement in
writing. All Triton PCS's rights and all of Nortel Networks' obligations are
valid only in the country in which the Products and Services were supplied; the
laws of the State of New York govern this Agreement, exclusive of its conflict
of laws provisions; and nothing in this Agreement affects any statutory rights
of consumers that cannot be waived or limited by contract.

14. INSURANCE

Prior to furnishing any Products or performing any Services, Nortel Networks
shall procure and maintain at its sole expense insurance of the following types
of coverage and limits of liability:

(a) Commercial General Liability (hereafter, "CGL") using forms equivalent to
ISO's (Insurance Services Office) Commercial General Liability Form including
Blanket Contractual Liability and Broad Form Property Damage, with limits of at
least $10,000,000 combined single limit for each occurrence for bodily injury,
property damage and personal injury claims. Limits of insurance may be satisfied
with Primary and Umbrella layers. CGL insurance to include Products Liability
and Completed Operations coverage in the amount of $10,000,000 each occurrence
and $10,000,000 aggregate. All CGL insurance shall designate Triton as an
Additional Insured with respect only to the operations of Nortel Networks. The
policy shall include a Waiver of Subrogation endorsement in favor of Triton PCS
except to the extent of the negligence of Triton PCS.

(b) Worker's Compensation, to the extent required by statute, together with
statutory Disability Benefits Liability as prescribed by the law of the State in
which performance will occur. Employer's Liability of at least $500,000. The
policy shall include a Waiver of Subrogation endorsement in favor of Triton PCS
except to the extent of the negligence of Triton PCS.

(c)   Automobile Liability insurance with limits of at least $10,000,000
      combined single limit each occurrence for Bodily Injury and Property
      Damage claims. The policy shall include Triton PCS as an additional
      insured. The policy shall include a Waiver of Subrogation endorsement in
      favor of Triton PCS except to the extent of the negligence of Triton PCS.
      The limit can be structured through Primary and Excess limits.

(d) "All Risk" Property Insurance, including the perils of transit, flood and
Boiler & Machinery, covering all equipment tools and other property of Nortel
Networks on a replacement cost basis. Any property purchased, acquired, leased,
rented or borrowed by Nortel Networks on behalf of Triton PCS shall be insured
by Nortel Networks' policy during the acquisition, installation and testing
phases and until such time as when the property is validated by Triton PCS.

(e) All coverages must be primary and noncontributory, must be written on an
occurrence basis and must be maintained without interruption from the date of
this Agreement until the date of expiration of this Agreement.

(f) Certificates of insurance or adequate proof of the foregoing must be filed
with Triton PCS prior to commencement of the delivery of the Products or
performance of the Services by Nortel Networks. The certificates of insurance
and the insurance policies required hereunder must reflect Additional Insured
wording as described in this Section with respect to all Products manufactured
for or delivered to Triton PCS. Failure

                                 Triton PCS PLA
                            CONFIDENTIAL INFORMATION
                                   Page 4 of 8

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
PURCHASE AND LICENSE AGREEMENT                            [NORTEL NETWORKS LOGO]

by Nortel Networks to provide such certification of insurance does not
constitute a waiver by Triton PCS of these insurance requirements.

(h) Nortel Networks shall cause its insurers to notify Triton PCS at least
thirty (30) days prior to cancellation of the required insurance policies.

(i) Nortel Networks is responsible for all deductible payments.

15. TERMINATION

(a) Triton PCS may, at its option and upon written notice to Nortel Networks,
terminate this Agreement in whole or in part, without penalty, if Nortel
Networks is in default under any material terms of this Agreement, and action to
correct such default, if curable, is not commenced within thirty (30) days after
receipt of notice from Triton PCS and such default is not thereafter cured
within sixty (60) days after commencement of correction, unless Nortel Networks
cannot complete such cure within such period for reasons beyond its control and
Nortel Networks is continuing to diligently pursue the cure, in which case such
default shall be cured no later than one hundred eighty (180) days after Nortel
Networks' original receipt of notice under this Section 115(a).

(b) In the event Triton PCS terminates this Agreement in accordance with Section
15(a), Triton PCS may at its option:

(i) return to Nortel Networks, freight collect, any Product delivered or
installed which is the subject of the default above if such default is Nortel
Networks inability to correct defects therein, in which event Nortel Networks
shall refund to Triton PCS all amounts paid to Nortel Networks under this
Agreement with regard to such Product and the Installation thereof; or

(ii) in the event that Nortel Networks refuses or fails to perform, or otherwise
defaults in, its obligations hereunder, it is agreed that Triton PCS shall have,
in addition to any other rights available to it, the right to obtain temporary
or permanent performance of such obligations or injunctive relief, as may be
applicable.

Except as expressly provided in this Agreement, the remedies provided in
Sections 15(a) and 15(b) shall be Triton PCS' exclusive remedies in case of
termination for default.

(c) Nortel Networks may terminate this Agreement without any obligation to
deliver Products not yet delivered, or, at its option, temporarily suspend its
performance, without liability, under this Agreement, in the event that Triton
PCS is in default under any material terms of this Agreement and correction is
not commenced within thirty (30) days after receipt of notice from Nortel
Networks and such default is not thereafter cured within sixty (60) days after
commencement of correction, unless Triton PCS cannot complete such cure within
such period for reasons beyond its control and Triton PCS is continuing to
diligently pursue the cure.

(d) If this Agreement expires, or if either Party terminates this Agreement in
accordance with its terms, Nortel Networks `obligations hereunder with respect
to Products already delivered, installed and not returned, and Triton PCS'
obligations with respect to payments for Products not returned, shall continue
in full force and effect.

16. DISPUTE RESOLUTION AND ARBITRATION

(a) Disputes

(i) Subject to a Party's right to obtain injunctive relief, Nortel Networks and
Triton PCS will attempt to settle any claim or controversy between them through
consultation and negotiation in good faith and with a spirit of mutual
cooperation. After attempts to resolve a dispute by Nortel Networks and Triton
PCS have failed, either Party may, upon notice to the other, request that such
controversy or claim be referred to the appropriate management personnel of each
Party for negotiation and resolution. If such a request is made, the applicable
and appropriate management-level personnel of the Parties shall meet in person
or by telephone within seven (7) days after such request and shall review and
attempt to negotiate a mutually acceptable resolution of the controversy or
claim in dispute. If after such meeting, such attempt to resolve the dispute has
failed, the dispute shall be referred to binding arbitration, as follows:

(i) Three arbitrators will be chosen in accordance with the procedures of the
AAA, which arbitrators will meet within thirty (30) days of the appointment of
all of them to commence the arbitration.

(ii) Arbitration. Other than as specified in this Section, the arbitration will
be conducted in accordance with the arbitration rules promulgated under the
American Arbitration Association ("AAA"). The arbitrator(s) shall be required to
furnish, promptly upon conclusion of the arbitration, a written decision,
setting out the reasons for such a decision. The decision of such arbitration
will be final and binding on the Parties hereto, and any such decision may be
enforced by either Party in any court of competent jurisdiction. Each Party will
bear its own expenses and an equal share of the expenses of the third arbitrator
and the fees, if any of the AAA. Any arbitration shall take place in New York,
New York, unless otherwise agreed to by the Parties.

TRITON PCS EQUIPMENT COMPANY L.L.C.

By:  Triton Management Company, Inc., its manager
By:      /s/ David D. Clark
   ---------------------------------------------------
Name:    David D. Clark
     -------------------------------------------------
Title:   EVP & CFO
      ------------------------------------------------
Address: 1100 Cassatt Rd. Berwyn PA 19312
        ----------------------------------------------
State of Incorporation:   DE
                       -------------------------------
Tax I.D. Number:          23-2930873
                --------------------------------------
Date:    5/14/02
     -------------------------------------------------

NORTEL NETWORKS INC.

By:      /s/ Robert A. Riccitelli
   ---------------------------------------------------
Name:    Robert A. Riccitelli
     -------------------------------------------------
Title:   Vice President
      ------------------------------------------------
Address: 1120 112th Ave. NE Suite 500
        ----------------------------------------------
Date:    5/16/02
     -------------------------------------------------
         Bellevue, WA 98004

                                 Triton PCS PLA
                            CONFIDENTIAL INFORMATION
                                   Page 5 of 8
<PAGE>
SERVICES SUPPLEMENT TO THE PURCHASE AND LICENSE AGREEMENT [NORTEL NETWORKS LOGO]

The various Services that Triton PCS may obtain from Nortel Networks, associated
pricing, and the manner in which they will be provided are governed by this
Services Supplement ("Supplement"). The terms and conditions provided in this
Supplement will apply solely to the provision of Services.

1. DEFINITIONS

(a) "Deliverables" means all Materials and Software delivered to Triton PCS
pursuant to an Order, but specifically excluding Tools.

(b) "Materials" means any and all designs, documentation and other work product
prepared by Nortel Networks and delivered to Triton PCS pursuant to an Order
(and specifically excluding Software).

(c) "Statement of Work" is a document, prepared by Nortel Networks, describing
the scope of work, schedule, prices, Deliverables, and other relevant terms
specific to a Service, which may, from time to time, be mutually agreed to in
writing by Triton PCS and Nortel Networks. A Statement of Work shall be governed
by the terms and conditions of, and constitute a part of, this Supplement.

(d) "Services Descriptions" means Nortel Networks published specifications for
certain Services in effect at the time Nortel Networks accepts an Order.

(e) "Tools" mean any diagnostics, documentation, test equipment or other items
used by Nortel Networks in the performance of the Services.

2. CHARGES AND PAYMENT

Fees for Services may be based on a fixed price, time and materials, time and
materials with deliverables or other commercial arrangement, as specified in an
Order. Unless otherwise included as part of a fixed price, Triton PCS will
reimburse Nortel Networks for all reasonable out-of-pocket expenses incurred by
Nortel Networks in performing the Services (including, without limitation, all
reasonable travel, meal, lodging and mileage expenses), provided that expenses
greater than $500 must be approved in writing in advance by Triton PCS. All fees
for Services are subject to annual review and adjustment by Nortel Networks.
Unless otherwise provided in a valid Nortel Networks quotation, proposal or
Statement of Work, Nortel Networks shall invoice Triton PCS one hundred percent
of the price of the Services upon completion unless the Service continues beyond
thirty days, in which case Nortel Networks shall invoice Triton PCS at the end
of each month for the Services performed in that month. Certain ongoing Services
(for example maintenance and managed services) ordered by Triton PCS may be
invoiced monthly, quarterly or yearly, as appropriate, in advance of the
performance of such Services in such month, quarter or year by Nortel Networks.

3. CHANGES TO ORDERS

The parties may, by mutual agreement, make changes to the scope of work,
schedule, prices, deliverables or other substantive aspects of the Services
("Change"). The party asking for a Change shall describe in writing the details
of the requested Change ("Change Order Request"). Nortel Networks shall provide
in writing to Triton PCS a summary of any and all adjustments to the charges and
other changes resulting from the Change Order Request. In no event shall any
Change be effective or acted upon in any way until such time as (i) an
authorized representative of both parties has agreed to the terms of the Change
Order Request in writing and (ii) Nortel Networks receives an Order from Triton
PCS for any additional amounts resulting from the Change Order Request.

4. TRITON PCS RESPONSIBILITIES

Triton PCS agrees to cooperate with Nortel Networks in the performance by Nortel
Networks of the Services, including, without limitation, providing Nortel
Networks with sufficient, free and timely access to facilities, data,
information and personnel of Triton PCS; including the recovery by Nortel
Networks of any Tools. In addition, Triton PCS shall be responsible for the
accuracy and completeness of all Triton PCS data and information that it
provides or causes to be provided to Nortel Networks. In the event that there
are any delays by Triton PCS in fulfilling its responsibilities as stated above,
or there are errors or inaccuracies in the information provided, Nortel Networks
shall be entitled to (i) a day-to-day delay in performance of Nortel Network's
obligations as a result of Triton PCS' delay and (ii) reimbursement by Triton
PCS of the out-of-pocket expenses incurred by Nortel Networks as a result of
Triton PCS' delay, including expenses incurred in connection with redeployment
and rescheduling of personnel; provided that Nortel Networks will use its
reasonable efforts to minimize such expenses. It is understood and agreed that
the Services provided by Nortel Networks may include the advice and
recommendations of Nortel Networks, but all decisions in connection with the
implementation of such advice and recommendations shall be the sole
responsibility of, and made by, Triton PCS.

5. PERSONNEL

Nortel Networks and Triton PCS are each responsible for the supervision,
direction, compensation and control of their own employees and subcontractors.
Nortel Networks may subcontract any portion or all of the Services to
subcontractors selected by Nortel Networks, upon no less than 10 days prior
written notice to Triton PCS. Neither party shall knowingly solicit to hire
employees of the other party with whom it had contact as a result of the
performance of the Services for a period ending six months after completion of
the Services. Neither party shall be precluded from conducting generalized
searches for employees (and hiring those employees who respond to generalized
searches) either through the use of search firms or advertisements in the media,
provided that searches are not specifically targeted to employees providing
Services.

6. PATENTS AND COPYRIGHTS

Nortel Networks will indemnify Triton PCS against any third party claims that
any Materials infringe or violate such third party's intellectual property
rights. Such indemnity will be in accordance with Section 11, Patents and
Copyrights, as set forth in the Purchase and License Agreement. In the event
Triton PCS is required to return to Nortel Networks any Materials in accordance
with that provision, Nortel Networks will give Triton PCS a credit equal to the
amounts paid by Triton PCS for the infringing Materials returned.

                                 Triton PCS PLA
                            CONFIDENTIAL INFORMATION
                                   Page 6 of 8
<PAGE>
SERVICES SUPPLEMENT TO THE PURCHASE AND LICENSE AGREEMENT [NORTEL NETWORKS LOGO]

7. INTELLECTUAL PROPERTY RIGHTS

(a) Nortel Networks, on behalf of itself and its subcontractors, reserves all
proprietary rights in and to (i) all methodologies, designs, engineering
details, and other data pertaining to the Services and the Materials delivered,
(ii) all original works, computer programs, updates developed in the course of
providing the Service (except Triton PCS's developed programs), (iii)
discoveries, inventions, patents, know-how and techniques arising out of the
Services and (iv) any and all products (including software and equipment)
developed as a result of the Services. The foregoing shall not apply to programs
developed by Triton PCS. The performance by Nortel Networks of Services shall
not be deemed work for hire.

(b) Nortel Networks grants to Triton PCS a perpetual, non-exclusive, world-wide,
paid up license to use, copy and modify the Materials produced by Nortel
Networks and delivered to Triton PCS in the performance of Services solely for
Triton PCS's internal business purposes.

(c) It is understood between the parties that Nortel Networks will employ its
know-how, techniques, concepts, experience and expertise, as well as all other
intellectual property, including that to which it reserves its rights hereunder,
to perform services the same as or similar to the Services for others.

8. MAINTENANCE SERVICES

Nortel Networks provides Product maintenance Services either at Triton PCS's
location or at a service center to keep Products in, or restore them to,
conformance with published specifications.

(a) To be eligible for maintenance Services, the Products must be in good
operating condition and at revision levels supported by Nortel Networks.

(b) Relocation of Products under maintenance Services may result in adjustments
to the price and response times. Continued maintenance Services for such
Products are subject to reasonable availability from Nortel Networks or an
authorized maintenance service provider.

9. GENERAL

In the event of a conflict between this Supplement and any other documents
attached hereto or referenced herein, the terms in this Supplement prevail.

10.PRICING AND AVAILABLE SERVICES

The Services to be provided and/or the applicable pricing shall be as set forth
in (i) an accepted Nortel Network's proposal, (ii) a Statement of Work or (iii)
the Services Descriptions.

                                 Triton PCS PLA
                            CONFIDENTIAL INFORMATION
                                   Page 7 of 8
<PAGE>
WARRANTY MATRIX                                           [NORTEL NETWORKS LOGO]

Products may be purchased only in countries where Nortel Networks makes these
products available for purchase and use.

The following Hardware and Software items shall have the corresponding warranty
periods:

<TABLE>
<CAPTION>
   CARRIER PRODUCTS                                            HARDWARE                                SOFTWARE
----------------------------------------------------------------------------------------------------------------------------
   <S>                                                         <C>                                     <C>
   DMS, Optical Networks, AccessNode and Wireless              ***** from ship date                    ***** from ship date
   product families

   CVX, SS7 Gateway, UE IMAS, Alteon and                       ***** from ship date                    ***** from ship date
   Shasta products

   JungleMux                                                   ***** from ship date                    ***** from ship date

   Carrier Data Products (Passport; Bay and Micom              See current Nortel  Networks            See current Nortel Networks
   products)                                                   price list.                             price list.

   All other product families not listed (unless specified     ***** from ship date                    ***** from ship date
   otherwise in writing)

</TABLE>

The following Products require an Enterprise Supplement to enable purchase.

<TABLE>
<CAPTION>
   ENTERPRISE PRODUCTS                                         HARDWARE                                SOFTWARE
----------------------------------------------------------------------------------------------------------------------------------
   <S>                                                         <C>                                     <C>
   Data Products (e.g., Access CN, Advanced Video,             See current Enterprise Data             See current Enterprise Data
   Backbone CN, Baystack, Business Communications              Products Product Catalog                Products Product Catalog
   Manager, Contivity, Instant Internet, Net ID, Passport
   LAN and WAN Solutions)

   Portal and Symposium Products                               ***** from ship date                    ***** from ship date

</TABLE>

The following Products require an eBusiness Solutions Supplement to enable
purchase.

<TABLE>
<CAPTION>
   eBUSINESS PRODUCTS                                          HARDWARE                                SOFTWARE
----------------------------------------------------------------------------------------------------------------------------------
   <S>                                                         <C>                                     <C>
   Clarify ECRM and eBusiness Service Provider Products        As quoted                               As quoted
</TABLE>

This Warranty Matrix may be revised from time to time.

                                 Triton PCS PLA
                            CONFIDENTIAL INFORMATION
                                   Page 8 of 8

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.<PAGE>
                                                                    Exhibit 10.8

[NORTEL NETWORKS LOGO]                                          TRITON PCS, INC.

GSM/GPRS SUPPLEMENT TO THE PURCHASE AND LICENSE AGREEMENT DATED MAY 16, 2002

The terms and conditions provided in this Supplement ("Supplement") are in
addition to those contained in the Purchase and License Agreement dated May 16,
2002 and will apply solely to the provision of the Products specified in this
Supplement during the term.

1.       TERM

Unless otherwise terminated in accordance with the terms hereof, this Supplement
will commence on May 16, 2002 and terminate three (3) years therefrom ("Term").

2.       DEFINITIONS

As used in this GPRS Supplement, the following capitalized terms shall have the
following meanings:

      a)    "Acceptance" shall mean the point at which all acceptance testing
            has been successfully completed in accordance with the Validation
            Tests set out in Schedule C-4 to this GSM/GPRS Supplement with a
            service ready Triton PCS market. Triton PCS may not postpone
            Acceptance due to any deficiencies not attributable to Nortel
            Networks.

      b)    "Data Center" shall mean the geographic location where a subset of
            the Third Generation Core Networks Products reside.

      c)    "GSM/GPRS Nodes" shall mean the MSC, HLR, Tri-Node, GGSN, SGSN, IWF,
            SIG, OMC-D, OMC-S

      d)    "GSM/GPRS Access Elements" shall mean the BSC, TCU, PCUSN, BTS,
            OMC-R

      e)    "Mobile Switching Service Center" or "MSC" shall mean the Third
            Generation Core Network Product which provides switching for GSM
            1900. It supports the Visitor Locate Register (VLR), the Gateway MSC
            (GMSC) functions, optional Signalling Transfer Point (STP) and
            Service Switching Point (SSP) capabilities.

      f)    "NSS" shall mean the network station subsystem.

      g)    "NSS/Core Base Software Release" shall mean all Base features that
            Nortel has made commercially available, all features required by
            regulatory bodies as of the date of initial deployment of the Third
            Generation Core Network and the NSS features noted as included in
            the NSS Software Table.

      h)    "Third Generation Core Network" shall mean the equipment and
            services for the NSS for GSM

      i)    "Validation" shall mean the point at which Nortel Networks has
            completed Installation and Commissioning of GSM/GPRS Nodes or
            GSM/GPRS Access Elements and at which all testing has been
            successfully completed in accordance with the Validation Tests set
            out in Schedule C-4 in a pre-integration test environment. Such
            GSM/GPRS Nodes or Access Elements are then ready for integration
            into the Triton PCS network.

3.   SCOPE / COMMITMENT / RESPONSIBILITIES OF THE PARTIES

During the Term, Triton PCS may purchase Nortel Equipment and Services for the
GSM/GPRS/EDGE and UMTS Third Generation Network at the prices set out in
Schedule A-1 to this GPRS Supplement, except for items identified in Schedule A
as excluded ("Excluded Items"). During 2002, Triton PCS agrees to purchase
Nortel Equipment and Services for the GSM/GPRS/EDGE and UMTS Third Generation
Network at the prices and quantities set out in Schedule A-2 to this GPRS
Supplement. Responsibilities of the parties are set out in Schedule B and C to
this GPRS Supplement.

5.   CHARGES AND PAYMENT

Nortel shall invoice Triton PCS in accordance with the following schedule:

         *****% of Order price upon Delivery of Products to the specified Triton
PCS delivery site.

         *****% of  Order price upon Validation of Products.

         *****% of Order price thirty (30) days after Acceptance of Products.

6.       WARRANTY

In the event Nortel Networks, during the applicable warranty period, fails to
repair or replace defective Hardware or to correct a defect in the Software that
materially and adversely affects the operation of the Software within thirty
(30) days of being notified of such defect, or if such repair, replacement or
correction is not capable of being completed within such thirty (30) day period
and Nortel Networks fails thereafter to diligently and continuously pursue such
repair, replacement and/or correction and to ultimately complete such repair,
replacement and/or correction within 60 days after being notified of such
defect, then Triton PCS shall be entitled, as its sole and exclusive remedy, to
a refund of the price paid for such Hardware and/or the license fees paid for
such Software, upon the return to Nortel Networks of the defective Hardware
and/or the discontinuance of the use of the Software, as the case may be.

For purposes of this GPRS Supplement, the warranty period for
SA-MSC/SA-HLR/Tri-Node/T1's/MMU's/XA-Core and BSC/TCU/BTS shall be ***** from

                                                                    PAGE 1 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
[NORTEL NETWORKS LOGO]                                          TRITON PCS, INC.

GSM/GPRS SUPPLEMENT TO THE PURCHASE AND LICENSE AGREEMENT DATED MAY 16, 2002

Acceptance and the warranty period for other Hardware and Software and
Installation Services shall be ***** Acceptance. The warranty period for all
other Services shall be ***** from completion of the Service.

7.       CONTINGENCY
*****

8. With respect to the Products and Services purchased by Triton PCS hereunder,
Nortel Networks will, at no additional charge to Triton PCS, provide shipping,
installation, integration and initial optimization in accordance with Schedules
B and C.

9. Late Delivery Fees. With respect to any Order which is forecasted in
accordance with Schedule B for which the required delivery schedule is within
the standard delivery intervals set out in Schedule B, and which is accepted by
Nortel Networks for GSM/GPRS Products under the terms of this Agreement, in the
event Nortel Networks fails to deliver the Products by the time set forth in
such Order, Nortel Networks agrees to credit Triton PCS, as late delivery fees,
an amount equal to ***** percent (*****%) of the price of the delayed Products,
per week, for each full week such GSM/GPRS Product is delayed, up to a maximum
of ***** percent (*****%) of the price of such Products ("Late Delivery Fees").
Payment of Late Delivery Fees shall be Triton PCS's sole remedy and Nortel
Networks sole liability with respect to delayed delivery of Products under this
Agreement. A percentage of the total amount of the late delivery fees accrued
with respect to a delayed Product shall be applied as a credit so as to reduce
the amount due and payable under each invoice issued for such delayed Product,
where the applicable percentage shall be the same as the percentage of the Order
price due and payable under that invoice pursuant to Section 5.

Notwithstanding the foregoing, the late delivery fees set forth in this Section
do not apply to the following circumstances, but only in the event, and to the
extent, that the delay is attributable to any act or omission of Triton PCS or
third parties under Triton PCS control (including, without limitation, its
agents, subcontractors or vendors (other than Nortel Networks)), or force
majeure events.

9.       INTEROPERABILITY

It is the parties' intent and expectation that the Products provided by Nortel
Networks to Triton PCS hereunder will conform to the applicable industry
standards for GSM and GPRS to the extent such standards are identified in Nortel
Networks specifications (the "Standards") and will interoperate with third-party
products used by Triton PCS in its GSM/GPRS/EDGE/UMTS network that conform to
the Standards. In the event that during the term of this Supplement, any Product
provided by Nortel Networks to Triton PCS hereunder fails to interoperate with
any such third-party product as a result of such Nortel Networks Product's
failure to conform to the Standards, Nortel Networks and Triton PCS will work
together in good faith to resolve any such interoperability issue, which
resolution may include, without limitation, Nortel Networks' provision of an
interface to Triton PCS to enable the Nortel Networks Product to interoperate
with such third-party product, at no additional charge to Triton PCS.

TRITON  PCS EQUIPMENT COMPANY  L.L.C.
BY:  TRITON MANAGEMENT COMPANY, INC., ITS MANAGER

By:        /s/ David D. Clark
           --------------------------------------
Name:      David D. Clark
           --------------------------------------
Title:     EVP & CFO
           --------------------------------------
Address:   1100 Cassatt Rd., Berwyn PA 19312
           --------------------------------------
Date:      5/14/02
           --------------------------------------

NORTEL NETWORKS INC.

By:        /s/ Robert A. Riccitelli
           --------------------------------------
Name:      Robert A. Riccitelli
           --------------------------------------
Title:     Vice President
           --------------------------------------
Address:   1120 112th Ave. NE, Suite 500
           --------------------------------------
Date:      5/16/02
           --------------------------------------
           Bellevue, WA 98004

                                                                    PAGE 2 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
                                   SCHEDULE A

                             PRODUCT/SERVICE PRICING

1.0      PRODUCT MODIFICATIONS
         Nortel Networks may, at its discretion, implement changes in the
         Products, modify the drawings and specifications relating thereto, or
         substitute Products of more recent design; provided, however, that any
         such changes, modifications or substitutions, shall not materially and
         adversely affect performance or operation of the System furnished by
         Nortel Networks under this Agreement. Nortel Networks agrees to provide
         Triton PCS with notice of such Product Modifications and the technical
         documentation related thereto.

2.0      CORE NETWORK ELEMENT PRICING

2.1      Pricing/Volumes. The price shall be as set forth in this Section 2 for
         all Core Network Elements and BSS Products required by Triton PCS
         during the term of the Agreement.

2.1.1    CORE NETWORK ELEMENTS

<TABLE>
<CAPTION>
              Element              Spares  E/F/I       Description                            Price
              -------              ------  -----       -----------                            -----
         GSM Core Elements
         -----------------
<S>                                <C>     <C>    <C>                                       <C>            <C>
TRINODE MSC/HLR/STP                  Inc    Inc   SNSE XA-Core Tri-Node w/OMCS              $  *****
*****
*****

MSC STAND ALONE                      Inc    Inc   Super Node XA-Core, Stand-Alone MSC       $  *****
*****
*****

HLR STAND ALONE                      Inc    Inc   SNSE XA-Core Stand-Alone w/OMC-S          $  *****
*****
*****

XA-CORE PE                           Inc    Inc   Rhino Processor Element                   $  *****          Per
*****                                                                                                      Processor

XA-CORE PE                           Inc    Inc   Atlas Processor Element                   $   *****         Per
*****                                                                                                      Processor

TRUNKING                             Inc    Inc   Per T1/E1 Trunk                           $   *****        Per T1
*****

MMU-FLPP INCREMENT (SN-MSC ONLY)     Inc    Inc   Mobility Management Unit & SS7 growth     $  *****        Per-MMU
*****                                                                                       $  *****         Total
</TABLE>

                                                                    PAGE 3 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
<TABLE>
<S>                                  <C>    <C>   <C>                                       <C>          <C>
TRI-NODE LPP GROWTH PACKAGE          Inc    Inc   Optional Pacakge Supporting SS7 Growth
*****                                                                                       $  *****         Total

TRI-NODE ENET UPGRADE PACKAGE        Inc    Inc   Optional Package for more than 240 T1's
*****                                                                                       $  *****

CIPC W/NETWORK DESIGN                Inc    Inc   CALEA Interface Provisioning Center
                                                  (server)                                  $  *****
</TABLE>

<TABLE>
<CAPTION>
        GPRS CORE ELEMENTS
        ------------------
<S>                                  <C>    <C>   <C>                                       <C>          <C>
SGSN (2,2,2)                         Inc    Inc   Model Pass Port VSS (GPRS-4.0)            $  *****
*****

GGSN (SMALL)                         Inc    Inc   Model Shasta BSN-5000 (GPRS-4.0)          $  *****
*****
*****

GGSN (LARGE)                         Inc    Inc   Model Shasta BSN-5000 (GPRS-4.0)          $  *****
*****
*****

CSD-IWF (24-PORT)                    Inc    Inc   Circuit Switched Data-Interworking
                                                  Function                                  $  *****
*****

SIG                                  Inc    Inc   SS7-IP Gateway GPRS 4.0                   $  *****
*****
</TABLE>

<TABLE>
<CAPTION>
           OSS ELEMENTS
           ------------
<S>                                  <C>    <C>   <C>                                       <C>          <C>
OSS PLATFORM FOR GPRS NETWORK,              Inc   Base OMC-D for GPRS 4.0 w/PPR             $  *****
*****
       OSS PLATFORM FOR BSS NETWORK  Inc    Inc   *****                                          NA       $  *****
       OSS PLATFORM FOR BSS NETWORK  Inc    Inc   *****                                          NA       $  *****
</TABLE>

<TABLE>
<CAPTION>
           BSS Hardware                                                                    wo/Software   w/Software
           ------------                                                                    -----------   ----------
<S>                                  <C>    <C>   <C>                                       <C>          <C>

BSC-e3000                                   Inc   3000 Elangs                               $  *****
*****

BSC-e1500                                   Inc   1500 Erlangs                              $  *****
*****

BSC-e600                                    Inc   600 Erlangs                               $  *****
*****

TCU-e3000                                   Inc   3000 Elangs                               $  *****
*****

TCU-e1500                                   Inc   1500 Erlangs                              $  *****
*****

TCU-e600                                    Inc   600 Erlangs                               $  *****
*****
</TABLE>

                                                                    PAGE 4 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
<TABLE>
<S>                                  <C>    <C>   <C>                                       <C>          <C>
PCUSN 24/12                                 Inc   Model Pass Port 7K                        $  *****
*****

PCUSN 24/8                                  Inc   Model Pass Port 7K                        $  *****
*****

PCUSN 12/4                                  Inc   Model Pass Port 7K                        $  *****
*****
</TABLE>

<TABLE>
<CAPTION>
            Cell Sims                                                                       HW/SW/EFI       HW/SW
            ----------                                                                       ---------       -----
<S>                                  <C>    <C>   <C>                                       <C>          <C>
eCell (O2)                                  Inc   eCell                                     $  *****      $  *****
BTS-Indoor (S111)                           Inc   S8000                                     $  *****      $  *****
BTS-Outdoor (S111)                          Inc   S8000                                     $  *****      $  *****
Single Radio (DRX)                          Inc   Additional Single Radio's                 $             $  *****
BTS Spares Kit                       NA      NA   Recommended 1 per 25 to 30                $  *****
BSC-TCU Spares Kit                   NA      NA   Recommended 1  Per Market                 $  *****
PCUSN Spares Kit                     NA      NA   Recommended 1  Per Market                 $  *****
</TABLE>

<TABLE>
<CAPTION>
             Software
             --------
<S>                                     <C>       <C>                                         <C>          <C>
BSS Software                                      GSM SW, Per Radio, New or Upgrade                NA       $  *****
BSS Software                                      GPRS SW, Per Radio, New or Upgrade               NA       $  *****
BSS Software                                      Edge SW, Per Radio, New or Upgrade               NA       $  *****
NSS Software (Per Node)                 Nodes =   SA-MSC, SA-HLR, Tri-Node, SGSN, GGSN             NA       $  *****
NSS Optional Features "Per Sub,
      Buy Out"                                    "This is in addition to the Base SW Price"       NA       $  *****
</TABLE>

<TABLE>
<CAPTION>
          GSM ESP Pricing
          ---------------
<S>                                                <C>
SA-MSC/SA-HLR/Tri-Node/T1's/MMU's/XA-Core          ***** % of Listed Price before any applicable discount
SGSN/GGSN/SIG/Preside/PCUSN                        ***** % of Listed Price before any applicable discount
BSC/TCU/BTS                                        ***** % of Listed Price before any applicable discount
</TABLE>

2.1.4 The Core Network Element offering, as applicable, includes the following
Equipment and Services:

         INCLUDED, AS REQUIRED:

         -  Items listed in the Core Network Element pricing table above

         -  Initial Base Software for NSS/Core

         -  NSS/Core Installation, Commissioning and Integration Testing

         -  Upon initial Installation:

            -     Network Design and Engineering

            -     Database Engineering

         -  Project Management

         -  Freight (to installation site)

         -  Nortel Networks recommended Hardware spares

         -  Documentation

         -  One (1) year TAS and Repair and Return

         -  Rebalancing of equipment to accommodate network growth (database
            engineering)

                                                                    PAGE 5 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
2.1.5    Each BSS offering, as applicable, includes the following Equipment and
         Services:

         INCLUDED, AS REQUIRED:

         -  Items listed in the Area A and B BSS pricing tables above

         -  Base Software for BSS

         -  BSS Installation, Commissioning and Testing.

         -  Project Management.

         -  Freight (to installation site)

         -  Documentation.

         -  One (1) year TAS and Repair and Return.

2.3      GSM/GPRS NETWORK ELEMENTS

2.3.1    TRI-NODE MSC

         The Tri-Node is based on the Nortel Networks DMS Platform. The Tri-Node
         will consist of the following cabinets:

         The Tri-Node Base Model available at launch is configured with XA Core
         1+1. NOTE: Each extension must include a minimum of ***** T1s.

<Table>
<Caption>

         Tri-Node Description                                         Quantity
         --------------------                                         --------
<S>                                                                   <C>
SNSX 1+1 WITH 5 MEMORY CARDS, 8K ENET                                  *****
-LIU7 (Channelized) 8-Meg                                              *****
-LIU7 (V.35 incl cable) 8-Meg                                          *****
-EIU                                                                   *****
-NIU                                                                   *****
LPP                                                                    *****
SDMFT 512 MEG, Incl spares                                             *****
CPDC                                                                   *****
CMSS                                                                   *****
MCAM III with Circuits                                                 *****
MCAM3 Power Only                                                       *****
MSC Cables                                                             *****
MSC Miscellaneous Hardware                                             *****
SNXA System Spares                                                     *****
MSC Map                                                                *****
</Table>

2.3.2    MSC

         The MSC is based on the Nortel Networks DMS Platform. The MSC will
         consist of the following cabinets:

         The MSC Base Model available at launch is configured with XA Core 1+1.
         NOTE: Each T1 extension package must include a minimum of ***** T1s.
         NOTE: First MMU/SS7 increment is *****, subsequent increments are
         *****.

                                                                    PAGE 6 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
<Table>
<Caption>
DESCRIPTION                                   QUANTITY
-----------                                   --------
<S>                                           <C>
XA Core (1+1)                                 *****
ENET Cabinets                                 *****
-8K to 16K increment                          *****
LPP                                           *****
LIU7 (channel-ized)                           *****
LIU7 (V.35)                                   *****
NIU                                           *****
EIU                                           *****
SDM                                           *****
CPDC                                          *****
MCSS                                          *****
MCAM3 w/circuits                              *****
MSC Cabling                                   *****
MSC Misc H/W                                  *****
DPCC (XA) Spares                              *****
MSC Spares                                    *****
MSC Map                                       *****
</Table>

2.3.3    HLR

         The HLR is based on the Nortel Networks DMS Platform. The HLR will
         consist of the following cabinets:

         The HLR Base Model available at launch is configured with XA Core 1+1.

<Table>
<Caption>
HLR DESCRIPTION                                   QUANTITY
---------------                                   --------
<S>                                              <C>
SNSX 1+1 WITH 5 MEMORY CARDS, 8K ENET            *****
CCS7 Server                                      *****
-LIU7 (V.35 incl cable)                          *****
-LIU7 (Channelized)                              *****
-EIU                                             *****
LPP                                              *****
SDM 512MB (incl spares)                          *****
CPDC                                             *****
CMSS                                             *****
MCAM III with Circuits                           *****
HLR Cabling                                      *****
HLR Miscellaneous Hardware                       *****
SNXA System Spares                               *****
HLR Map                                          *****
</Table>

2.3.4    SGSN PLATFORM

                                                                    PAGE 7 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
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treatment has been requested with respect to the omitted portions.
<PAGE>
         The SGSN is based on the Nortel Networks Passport Platform consisting
         of ***** and ***** shelf. The SGSN will consist of the following
         hardware:

<Table>
<Caption>
---------------------------------------------------------------
DESCRIPTION                                   QUANTITY PER SGSN
                                                 (SMALL MODEL)
---------------------------------------------------------------
<S>                                         <C>
---------------------------------------------------------------
PP15000-VSS Frame -- Base System
Package                                           *****
---------------------------------------------------------------
 Control Processor (CP2)                          *****
---------------------------------------------------------------
 Control Processor (CP3)                          *****
---------------------------------------------------------------
 DC Power Supply Assembly                         *****
---------------------------------------------------------------
 2 Port OC-3 FP (Intershelf on PP8K)              *****
---------------------------------------------------------------
 4 Port OC-3 MM FP (Intershelf on PP15K)          *****
---------------------------------------------------------------
 56Gbps Fabric Module                             *****
---------------------------------------------------------------
 Alarm/BITS DS1 Module                            *****
---------------------------------------------------------------
2 Port 100Base T Ethernet                         *****
---------------------------------------------------------------
2 Port OC-3 FP (Inter-shelf on PP8K)              *****
---------------------------------------------------------------
4 Port OC-3 MM FP (Inter-shelf on PP15K)          *****
---------------------------------------------------------------
Wireless Packet Data Server (WPDS, GSD            *****
---------------------------------------------------------------
Dual Port General Processor with disk (GSC        *****
---------------------------------------------------------------
32 Port MSA DS1 (GTL)                             *****
---------------------------------------------------------------
MSA32 Term Panel -- RJ45/RJ48C (GTL cap           *****
---------------------------------------------------------------
MSA32 8 X T1 15m Fan out Cable (GTL cap           *****
---------------------------------------------------------------
Frame Relay Feature Set (per MSA32, Softw         *****
---------------------------------------------------------------
Blank Faceplate for PP8K                          *****
---------------------------------------------------------------
Blank Faceplate for PP15K                         *****
---------------------------------------------------------------
Duplex cable, SC to SC, Multimode, 5 mete         *****
---------------------------------------------------------------
PP Anchoring Kit for Zone 4 seismic region        *****
---------------------------------------------------------------
Documentation for PP 8K/15K, PCR 2.1 CD           *****
---------------------------------------------------------------

</Table>

2.3.5    GGSN PLATFORM

         The GGSN is based on the Nortel Networks Shasta Platform. The GGSN will
consist of the following Hardware: ..

         Shasta Model:Small

<Table>
<Caption>
---------------------------------------------------------------
DESCRIPTION OF COMPONENTS                     QUANTITY
---------------------------------------------------------------
<S>                                         <C>
---------------------------------------------------------------
SHASTA 5000 BSN CHASSIS -- DC POWER               *****
---------------------------------------------------------------
CONTROL MANAGEMENT CARD -- 1G                     *****
---------------------------------------------------------------
8xFE (UTP5)                                       *****
---------------------------------------------------------------
SWITCH FABRIC CARD -- 10G                         *****
---------------------------------------------------------------
SSC-II + 4XSSM-II W/3DES                          *****
---------------------------------------------------------------
Slot Cover                                        *****
---------------------------------------------------------------

</Table>

         Shasta Model:Large

                                                                    PAGE 8 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

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filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
<Table>
<Caption>
Description of components                   Quantity
-------------------------                   --------
<S>                                         <C>
SHASTA 5000 BSN CHASSIS - DC POWER           *****
CONTROL MANAGEMENT CARD - 1G                 *****
4XOC-3 MULTIMODE ATM LINECARD                *****
8xFE (UTP5)                                  *****
10G SFC (1+1 Hot Standby)                    *****
SSC-II+4XSSM-II W/3DES                       *****
SSC-II+4XSSM-II NO ENC.                      *****
Slot Cover                                   *****
</Table>

         The above GGSN's do not include Hardware or Software required for
         optional Broadband Service Node IP Services on the Shasta platform.

2.3.6    SIG

         The SIG is based on a Hewlett Packard 9000 hardware platform. The SIG
configuration consists of the following hardware:

         SIG Model:

<Table>
<Caption>
Description                                 Quantity
-----------                                 --------
<S>                                         <C>
Base Package (Based on L Series SIG)         *****
-CPUs                                        *****
-TSUs                                        *****
-TSC's (V.35)                                *****
-TSC's (T1)                                  *****
-SS7 links (active + standby)                *****
Spares                                       *****
</Table>

2.3.7    GPRS OAM PLATFORMS

         The GPRS OAM Platform configuration supports the following
         functionality:

            -     Fault Management

            -     Real Time Performance Management

            -     Performance Reporting

            -     Historical Fault

            -     Configuration Management

            -

         The configuration of the OAM Platform as engineered for this network
design is as follows:

         GPRS OAM Platform Model:

                                                                    PAGE 9 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
<Table>
<Caption>
PWI Solution for GPRS
wo/CGF-DNS-DHCP-Radius                          Quantity
-------------------------                       --------
<S>                                             <C>
Hardware Total
OMCD Server Sunfire 880                          *****
PPR Server U10                                   *****
MDP Server U10                                   *****
SCS Server                                       *****
OMCD Client E250                                 *****
PPR Client E250                                  *****
Network Management SW
Preside Base RTU (Network MGMT) one per network  *****
SGSN - per 50k subs - per NE                     *****
GGSN (100k subs) - per NE                        *****
Border Gateway                                   *****
SSIG/SS7 Gateway                                 *****
CD&Document
  PPR Documentation (NTNM22WAAA+NTNM22WBAA)      *****
Preside performance Reporting
  PPR RTU                                        *****
  SGSN - per 50k subs - per NE                   *****
  GGSN Shasta in GPRS 4                          *****
  SIG/SS7 Gateway                                *****
</Table>

2.4      The Nortel Networks GSM/GPRS Product offering, as applicable, excludes
         the following:

    EXCLUDED:

         -  Real estate, Buildings, structures.

         -  Zoning and Site acquisitions.

         -  External BTS equipment: towers, antennae, shelters, RF cable
            systems.

         -  Lightning protection/grounding.

         -  AC and or DC power systems and batteries.

         -  HVAC systems.

         -  Fire suppression.

         -  DSX panels.

         -  RF Plan, Design, and Engineer.

         -  RF Network Design and ongoing RF optimization

         -  Field maintenance

         -  Alteon web servers

         -  Shasta BSN IP Services.

         -  OSS (Other than OMC-D, OMC-R, OMC-S Preside)

         -  Locations/Presence Servers.

         -  PBX.

         -  Billing/Mediation systems other than SDM.

         -  Tandem & Long DistanceSwitching.

         -

         -  STPs

         -  Paging systems.

         -  SMS systems.

         -  Voice Mail systems.

         -  External Authentication Centers

         -  Pre-Paid (Voice and Data)

         -  GMLC GSM Mobile Location Center

                                                                   PAGE 10 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

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treatment has been requested with respect to the omitted portions.
<PAGE>
         -  SMLC Serving Mobile Location Center

         -  NGS Network Gateway Server

         -  Core Routers

         -  WAP Servers

         -  SIP Servers

         -  Handsets

         -  Transmission equip: MUX, channel banks, microwave, DACS, echo
            cancellers, etc.

         -  Data backbone: LAN/WAN, ATM/IP/Ethernet

         -  Extraordinary delivery requirements (helicopters, bulldozers,
            cranes)

         -  Relocation of equipment between buildings

         -  E911 Phase 2 hardware

         -  Traffic analysis tools

         -  AMR

         -  Camel 1 &2 Hardware

3.0      SOFTWARE

3.1      NSS Software Content

         The Table A.1 below identifies licensed Software and features required
         by Triton PCS which shall be made available in the Initial NSS Load, at
         no additional charge. All off board platforms will be quoted
         separately; however, they have been reflected where necessary in Table
         A.1 below. All platforms required for feature implementation have also
         been reflected.

         All features included in the initial load provide the enabling software
         for the described features and will be ready for FOA and all remaining
         market deployments. The initial load for Triton PCS will be GSM NSS 15
         and GPRS 4.0

                                    TABLE A.1

<TABLE>
<CAPTION>
                                                                        PLATFORMS REQUIRED AND
                                     INCLUDED IN                         INCLUDED IN NSS/CORE     PLATFORMS REQUIRED
   SECTION A                      INITIAL NSS LOAD         NOTES           SOFTWARE PRICING        BUT NOT INCLUDED
   ---------                      ----------------         -----           ----------------        ----------------
<S>                                <C>                 <C>              <C>                       <C>

   AUTHENTICATION                        YES                                HLR/MSC/VLR/AC
   BARRING ALL INCOMING CALLS            YES                                  HLR/MSC/VLR
   BARRING ALL OUTGOING CALLS            YES                                  HLR/MSC/VLR
   CALL PROGRESS                         YES                                       -                   TERMINAL
   CALL WAITING                          YES                                  HLR/MSC/VLR
   CALL NUMBER PRESENTATION              YES                                  HLR/MSC/VLR
   CALL NUMBER RESTRICTION               YES                                  HLR/MSC/VLR
   INTERNATIONAL ROAMING                 YES                                    HLR/VLR
   PERIODIC REGISTRATION                 YES                                    HLR/VLR
   TWO WAY SMS                           YES                                  HLR/MSC/VLR                SMSC
   THREE WAY CALLING                     YES                                  HLR/MSC/VLR
   VOICEMAIL                             YES                                  HLR/MSC/VLR                 VMS
   911 SUPPORTED WITHOUT SIM             YES                                      MSC
   CALL FORWARDING                       YES                                  HLR/MSC/VLR
   MWI                                   YES                                  HLR/MSC/VLR                SMSC
   SUBSCRIBER IDENTIFIER                 YES                                      HLR
</TABLE>

                                                                   PAGE 11 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION
<PAGE>
<TABLE>
<S>                                <C>                 <C>              <C>                       <C>
   TERMINAL IDENTIFIER                   YES                                      MSC
                                         YES           SEE SECTION            HLR/MSC/VLR
                                                       BELOW FOR
   SMS OVER DTC                                        DETAIL.
   VOICE PRIVACY                         YES                                    HLR/AC
   OPERATOR DETERMINED BARRING           YES                                  HLR/MSC/VLR
   DISPLAY NUMBER CALLED                 YES                                                           TERMINAL
   IN SERVICE DISPLAY                    YES                                                           TERMINAL
   LAST NUMBER DIALED                 TERMINAL                                                         TERMINAL
</TABLE>

                                                                   PAGE 12 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION
<PAGE>
<TABLE>
<CAPTION>
                                                                               PLATFORMS REQUIRED AND
                                            INCLUDED IN                         INCLUDED IN NSS/CORE     PLATFORMS REQUIRED
   SECTION A                             INITIAL NSS LOAD         NOTES           SOFTWARE PRICING        BUT NOT INCLUDED
   ---------                             ----------------         -----           ----------------        ----------------
<S>                                      <C>               <C>                 <C>                       <C>
     SERVICE PROVIDER IDENTIFICATION          TERMINAL                                                      TERMINAL
     PHONE BOOK                               TERMINAL                                                      TERMINAL
     SMS STORAGE                              TERMINAL                                                      TERMINAL
     CSD                                         YES       S/W NOW INCLUDED         HLR/MSC/VLR               IWF
     CALL TRANSFER                               YES       ADDITIONAL ITEM          HLR/MSC/VLR
</TABLE>

ALL FEATURES IN SECTION B REQUIRED BY REGULATORY BODIES AS OF THE EFFECTIVE DATE
ARE INCLUDED IN THE BASE LOAD.

<TABLE>
<CAPTION>
                                                                        PLATFORMS REQUIRED AND
                                     INCLUDED IN                         INCLUDED IN NSS/CORE     PLATFORMS REQUIRED
   SECTION B                      INITIAL NSS LOAD         NOTES           SOFTWARE PRICING        BUT NOT INCLUDED
   ---------                      ----------------         -----           ----------------        ----------------
<S>                               <C>                  <C>              <C>                       <C>
     E911 PHASE 1                            YES                                 HLR/MSC/VLR
     E911 PHASE 2                            YES                                 HLR/MSC/VLR             LOCATION
                                                                                                          CENTER
     CALEA PHASE 1                           YES                                 HLR/MSC/VLR           DF

     CALEA PHASE 2                           YES                                 HLR/MSC/VLR              LAWFUL
                                                                                  SGSN/GGSN              INTERCEPT
                                                                                                          GATEWAY
     LNP PHASE 1                             YES       PHASE 2 PLANNED           HLR/MSC/VLR                SCP
     LNP PHASE 2                             YES                                 HLR/MSC/VLR
     TTY VERSION 13.3                        YES                                                          SERVICE
                                                                                                          CENTER
</TABLE>

<TABLE>
<CAPTION>
                                                                        PLATFORMS REQUIRED AND
                                     INCLUDED IN                         INCLUDED IN NSS/CORE     PLATFORMS REQUIRED
   SECTION C                      INITIAL NSS LOAD         NOTES           SOFTWARE PRICING        BUT NOT INCLUDED
   ---------                      ----------------         -----           ----------------        ----------------
<S>                               <C>                  <C>              <C>                       <C>
     CLOSED USER GROUP                YES                                    HLR/MSC/VLR
     DIRECTORY ASSISTANCE CALL        YES           FEATURE SUPPORTED        MSC                    ACC
     COMPLETION
     PRIVATE NUMBER PLAN              YES                                    MSC/VLR
     SINGLE NUMBER (HOTLINE)          YES           DISCUSSION COMPLETE      HLR/MSC/VLR
     GROUP PLANNING/FAMILY PLAN       YES                                    HLR/MSC/VLR
     TOLL RESTRICT                    YES                                    HLR/MSC/VLR
     V611                             YES           DISCUSSION ONGOING       MSC                    SCP
     SELF PROVISIONING                NO            DISCUSSION ONGOING
     WIRELESS TOLL FREE SERVICES      YES           DISCUSSION ONGOING       MSC                    SCP
     NUMBER RETENTION (PORTING        NO            DISCUSSION               HLR/MSC/VLR            STP/SCP
</TABLE>

                                                                   PAGE 13 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION
<PAGE>
<TABLE>
<S>                                   <C>           <C>                        <C>                    <C>
     NUMBERS FROM TDMA TO GSM)                      ONGOING
                                      NOT INCLUDED  AVAILABLE FOR              SGSN/GGSN              PREPAID
                                                    LAUNCH                                            PLATFORM
                                                                                                      /SCP/SMS/
                                                                                                      INTELLIGENT
     PRE-PAID FOR GPRS                                                                                PERIPHERAL
     ADVICE OF CHARGE                 NO            DISCUSSION ONGOING         HLR/MSC/VLR
     FLEXIBLE ALERTING                YES           DISCUSSION ONGOING         HLR/MSC/VLR
     MULTI-PARTY SERVICE              YES           S/W NOW INCLUDED           HLR/MSC/VLR
     MULTIPLE SUBSCRIPTIONS           YES                                      HLR/MSC/VLR
     DOWNLOADABLE RING TONE
     / GRAPHICS                       TERMINAL                                                        TERMINAL
</TABLE>

         Notes to Table A.1 Acronyms:

         HLR=Home Location Register

         VLR=Visiting Location Register

         MSC=Mobile Switching Center

         STP=Signal Transfer Point

         SCP=Service Control Point

         VMS=Voice Mail System

         SMSC=Short Message Service Center

         AC=Authentication Center

         IWF=Inter-Working Function

         ACC=Assistance Call Completion

         OTAF=Over-the-Air Activation Facility

         GPRS=General Packet Radio Service

         SGSN=Serving GRPS Support Node

         GGSN=Gateway GPRS Support Node

         * = Further information/analysis may be required

         Any Software or features not expressly identified and listed above as
         included in the Initial NSS Load are not included in the Core Network
         Element Price. The Parties may, by mutual agreement, add Software or
         features to be provided by Nortel Networks to Triton PCS under this
         Agreement.

6.0      GSM/GPRS BASE FEATURES AND OPTIONAL FEATURE BUYOUT

         Triton PCS shall have the right to purchase the GSM/GPRS Base Software
         Features on a per Node basis at ***** Dollars ($*****) per Node. Triton
         PCS shall have the option to buyout the license fees applicable to all
         generally available Optional Features of a specific Software Release
         that are not included in the GSM/GPRS Base Software Release ("GSM/GPRS
         Optional Feature Buyout"). The license fee applicable to a GSM/GPRS
         Optional Feature Buyout shall be ***** Dollars ($*****) per subscriber
         . Should Triton PCS elect to purchase individual Optional Features, the
         license fee for such individual Optional Features shall be the
         then-current list price less *****% for voice features or then-current
         list less *****% for data features. The GSM/GPRS Optional Feature
         Buyout excludes Broadband Service Node software, which includes
         separately priced Data/ Internet Services. The following additional
         conditions shall apply to

                                                                   PAGE 14 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

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filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
         Triton PCS's exercise of an Optional Feature Buyout: i) When exercised,
         the Optional Feature Buyout must apply to all GSM/GPRS Nodes in service
         at issuance of the Order for the Optional Feature Buyout; ii) Triton
         PCS will issue a non-cancelable Order for the total Optional Feature
         Buyout price no later than sixty (60) days prior to planned Optional
         Feature implementation; iii) Nortel will invoice Triton PCS for *****
         percent (*****%) the of Optional Feature Buyout license fee upon
         Validation of the Software Release in the first applicable Third
         Generation Core Network elements in the Triton PCS network. Payment
         shall be due thirty (30) days from the date of invoice; iv) The
         hardware discounts set out in Section 8.0 of this Schedule A shall not
         apply to the Optional Software Buyout pricing.

7.0      EXTENDED SERVICE PLAN

         At the conclusion of the Third Generation Warranty Period, Triton PCS
         agrees to purchase from Nortel post warranty services ("Extended
         Service Plan") for the Third Generation Network equipment purchased
         pursuant to this GPRS Supplement. The price for such Extended Service
         Plan for will be based on cumulative prior years' purchases from the
         Effective Date, net of any Network Elements removed during the prior
         year period, times ***** Percent (*****%) for the MSC/HLR, *****
         Percent (*****%) for the BSS/BSC/TCU and ***** Percent (*****%) for all
         other Third Generation Core Network Elements. Payment will be made on
         the defined date for the start of ESP of each year based on the prior
         calendar year's purchases.

8.0      NON-MODEL PRODUCTS PRICING

         Products related to the Core Network Elements, which are purchased
         individually, outside the model configuration set out in Section 2.0
         above shall be priced at then current list prices less the following
         discounts:

<TABLE>
<CAPTION>
                  CORE NETWORK ELEMENT                                DISCOUNT
                  --------------------                                --------
<S>                                                                   <C>
                  SGSN                                                 *****%
                  GGSN                                                 *****%
                  MSC                                                  *****%
                  HLR                                                  *****%
</TABLE>

         All other non-model Core Network Element Products are non-discountable.

9.0      SERVICES

         The price and scope of additional Services shall be as mutually agreed
         to by the Parties and incorporated as a part of the Services
         Supplement. Examples of such services to be provided at an additional
         charge include remote maintenance or surveillance, etc.

10.0     TRAINING

                                                                   PAGE 15 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
10.1     During the Term, Nortel Networks shall provide Triton PCS with Training
         credits in the amount of ***** Dollars ($*****) each year that GSM/GPRS
         Nodes are purchased and *****% of the Triton PCS requirements for
         GSM/GPRS Nodes are purchased from Nortel Networks.

10.2     During the Term, Nortel Networks shall provide Triton PCS with Training
         credits in the amount of ***** Dollars ($*****) each year that GSM/GPRS
         Access Elements are purchased, and *****% of the Triton PCS
         requirements for GSM/GPRS Access Elements are purchased from Nortel
         Networks. For purposes of this Supplement, "Access Elements" are
         defined as BSC, TCU, PCUSN and BTS. Training shall be made available by
         Nortel Networks at then-current list prices, plus appropriate travel
         and living charges.

         Access Elements are defined as BSC, TCU, PCUSN, BTS.

11.0     DISCOUNTS AND PRODUCT CREDITS

11.1     Product Credits

         Should Triton PCS purchase a minimum of *****% of the Triton PCS
         GSM/GPRS access network requirements from Nortel Networks in any
         calendar year during the Term, Nortel Networks shall make available to
         Triton PCS, product credits in an amount equal to ***** percent
         (*****%) of the total amount paid to Nortel Networks in such calendar
         year ("Annual Product Credits") for GSM/GPRS Products. The Annual
         Product Credits shall be accrued during the year and made available for
         Triton PCS's use during the remainder of the Term. The Annual Product
         Credits shall remain valid for use during the Term and shall be applied
         to Orders issued under this Agreement at a rate no greater than *****
         percent (*****%) per Order.

11.2     Executive Discount

         Should Triton PCS purchase *****% of the Triton PCS GSM/GPRS Node
         requirements in any calendar year during the Term, Nortel Networks
         shall make available to Triton PCS, an executive discount of *****
         percent (*****%) against the price of each GSM/GPRS Node set out in
         Section 2.0. ("Executive Discount")

         The Executive Discount does not apply to Software, Services, Extended
         Warranty or non GSM/GPRS Nodes.

                                                                   PAGE 16 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
                                  SCHEDULE A-1

                               2002 PURCHASE TERMS

1.0      2002 CORE NETWORK PURCHASE

<TABLE>
<CAPTION>
TRITON PCS CORE NETWORK PHASE ONE 2002
Item                                                Per Unit Price     Qty.           Price       Extended Price w/Disc.
----                                                --------------     ----           -----       ----------------------
<S>                                                 <C>               <C>      <C>    <C>         <C>
NSS SOFTWARE
Switch Processor Config                                               *****
NSS Software Load                                                     *****
NSS Base Software Upgrades                              $*****        *****               $*****                   $*****
NSS Optional Feature Buy-Out Per-Sub                    $*****        *****               $*****                   $*****

NSS HARDWARE
Super Node MSC XA-Core 1+1                              $*****        *****               $*****                   $*****
Tri-Node MSC/HLR XA-Core 1+1                            $*****        *****               $*****                   $*****
SDM-FT                                                  $*****        *****               $*****                   $*****
Additional PE Elements                                  $*****        *****               $*****                   $*****
T1 Ports                                                $*****        *****               $*****                   $*****
Super -Node SS7 MMU Additions                           $*****        *****               $*****                   $*****
Tri-Node HW Expansion SS7-ENET                          $*****        *****               $*****                   $*****
HLR (DMS XA-Core 1+1)                                   $*****        *****               $*****                   $*****
CIPC GSM Voice                                          $*****        *****               $*****                   $*****
                                       SUBTOTALS                                          $*****                   $*****
GPRS SOFTWARE
GPRS Software Load                                                             *****
GPRS Base Software Upgrades                             $*****        *****               $*****                   $*****

GPRS HARDWARE
SGSN (Small)                                            $*****        *****               $*****                   $*****
SGSN (Upgrade)                                          $*****        *****               $*****                   $*****
GGSN (Small)                                            $*****        *****               $*****                   $*****
SIG (HP Platform)                                       $*****        *****               $*****                   $*****
Border Gateway (CES 1500)                               $*****        *****               $*****                   $*****
IWF                                                     $*****        *****               $*****                   $*****
*OMC-R Extension for GPRS                               $*****        *****               $*****                   $*****
Preside OAM wo/CGF/DNS/DHCP/Radius                      $*****        *****               $*****                   $*****
                                       SUBTOTALS                                          $*****                   $*****
GSM ***** Extended Warranty                                           *****               $*****                   $*****
GPRS ***** Extended Warranty                                          *****               $*****                   $*****
                             CORE NETWORK TOTALS                                                                   $*****
</TABLE>

                                                                   PAGE 17 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                      SCHEDULE B
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
2.0      2002 CORE NETWORK PURCHASE PAYMENT TERMS

         Nortel shall invoice Triton PCS in accordance with the following
         schedule for the 2002 Core Network Purchase:

         $***** at Shipment, to be paid by Triton PCS within 10 days of the date
         of the invoice.

         $***** or the unbilled amount remaining from the 2002 Core Network
         Purchase on January 15, 2003, to be paid by Triton PCS within 10 days
         of the date of the invoice.

                                   SCHEDULE B

                   FORECASTING, DELIVERY, BILLING AND PAYMENT

1.       OBJECTIVE

         The common objective of Nortel Networks and Triton PCS under this
         Agreement is to design and implement a demand management process that
         is simple, flexible and clearly defines the roles and responsibilities
         of each party.

2.       FORECASTING AND ORDERING

         Nortel Networks and Triton PCS will, as much as possible, work toward a
         mutually beneficial system of forecasting and order management to
         ensure optimal deployment and operational effectiveness.

         a)   Triton PCS Provided Forecasts to Nortel Networks

              Triton PCS shall provide to Nortel Networks good faith forecasts
              of anticipated requirement levels of Third Generation Network
              Products by product type ("Forecasted Orders"). Such forecasts
              shall be subject to acceptance by Nortel Networks, such acceptance
              not to be unreasonably withheld and with such acceptance to be
              only refused based upon limitations of Nortel Networks' production
              capacity and material availability, which Nortel Networks cannot
              reasonably avoid. In the event that any forecast is not accepted,
              Nortel Networks shall promptly inform Triton PCS of the quantities
              of any relevant Product which Nortel Networks expects to be able
              to deliver to Triton PCS. Beginning with the first month of the
              Term, Triton PCS will deliver to Nortel Networks on or before the
              20th day of each month a non-binding forecast for the six (6)
              month period commencing on the first day of the following month.

         b)   Contingencies for Shortened Delivery Intervals

              Should Nortel Networks receive a Forecasted Order with delivery
              intervals that are shorter than Nortel Networks' standard delivery
              intervals as set out in Section 3 below, Nortel Networks shall use
              commercially reasonable efforts to accommodate the delivery
              intervals set forth in such Order, and shall, within fifteen
              business (15) days, indicate in writing to Triton PCS whether

                                                                   PAGE 18 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                      SCHEDULE B
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
              such shortened delivery intervals are acceptable. If such
              shortened delivery intervals are unacceptable, the parties hereto
              shall endeavor to agree upon delivery intervals that are mutually
              accepted. Nortel Networks agrees to make commercially reasonable
              efforts to meet Triton PCS's request to reduce the delivery
              interval, provided that Triton PCS shall compensate Nortel
              Networks for all extraordinary expenses directly incurred by
              Nortel Networks as a result of meeting, or attempting to make,
              such shortened delivery interval.

                                                                   PAGE 19 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                      SCHEDULE B
                                                        CONFIDENTIAL INFORMATION

<PAGE>
3.       DELIVERY

         For Forecasted Orders, intervals from receipt of Order to delivery of
         GSM/GPRS Products shall be as follows:

<TABLE>
<CAPTION>
         PRODUCTS                                             INTERVAL WEEKS

<S>                                 <C>                       <C>
         MSC                                                           *****
         HLR                                                           *****

         GPRS SGSN                                                     *****
         GPRS GGSN                                                     *****
         GPRS SS7 GATEWAY                                              *****
         GPRS OAM Platform                                             *****

         BSC                                                           *****
         TCU                                                           *****
         PCUSN                                                         *****
         BTS                                                           *****
         OMC-R                      *****                              *****
</TABLE>

                                                                   PAGE 20 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                      SCHEDULE B
                                                        CONFIDENTIAL INFORMATION

***** Certain information on this page has been omitted from this filing and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to the omitted portions.
<PAGE>
                                  SCHEDULE C-1

                        PROCESS FOR ESTABLISHING SCHEDULE

1.0      PROCESS OVERVIEW

         This Schedule C-1 provides a series of actions that comprise the
         general process involved in establishing a schedule by Data Center.
         Prior to the initiation of the first Market or build, Triton PCS and
         Nortel Networks agree to finalize the total process which will not
         materially change the intent of this Schedule. This Schedule also
         outlines at a high level, the duties of each of the parties to provide
         specific information to the other in order to avoid impacting the
         overall project schedule.

         As used in this Schedule C-1, "Data Center" shall mean equipment and
         services for network service subsystems ("NSS") and base station
         subsystems ("BSS") for GSM/GPRS/EDGE and UMTS (collectively, Third
         Generation Core Network), covering the Data Centers set out below as of
         the date of this Agreement.

         -

          The Third Generation Core Network consists of some or all of the
          following components:

         -    MSC,

         -    HLR,

         -    GPRS SGSN,

         -    GPRS GGSN,

         -    GPRS SS7 GATEWAY,

         -    GPRS OAM PLATFORM,

         -    UMTS PSTN-GW,

         -    UMTS PSTN Gateway Controller,

         -    UMTS Call Server,

         -    UMTS Wireless Gateway,

         -    UMTS Wireless Gateway Controller,

         -    UMTS Anchor Packet Gateway,

         -    UMTS Preside service Accounting,

         -    UMTS HLR (1),

         -    UMTS HLR (2),

         -    UMTS SS7 Gateway,

         -    UMTS Preside Policy,

         -    Service Control Point (SCP).

         Note:    As used in the matrices in this Schedule B, "X" denotes
                  primary responsibility "(X)" denotes supporting or
                  collaborating role. Where the responsibilities of Triton PCS
                  and Nortel are indicated as equal in a matrix, the Parties
                  will work together to achieve a successful outcome.

1.1      Pre-Planning

         The pre-planning stage is when all market specific information such as:
         planned system configuration, capacity, and planned physical locations
         for Third Generation Core

                                                                   PAGE 21 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-1
                                                        CONFIDENTIAL INFORMATION
<PAGE>
         Network components are to be compiled by Triton PCS.

1.2      Bench Marking of Current System

         Bench marking of the network is a process that involves various forms
         of data collection. The objective is to define the Third Generation
         Core Network performance in terms of a standard of measurement or
         evaluation. A system benchmark includes, but is not limited to
         statistical evaluation and collection of switched based system
         performance metrics.

1.3      Market Requirement Questionnaire (MRQ)

         When completed, the MRQ is the overall governing document that
         encompasses two subsections of information relating to network
         engineering, and database engineering, Each of these subsections
         contain specific questions required to be answered by the responsible
         Triton PCS organizations with the assistance of Nortel.

1.3.1    Definition of terms appearing in an MRQ

a)       CIQ - The CIQ is a Customer Input Questionnaire or Customer Information
         Questionnaire. The Questionnaire is the formal starting point for the
         collection of the Triton PCS specific information that will be used by
         Nortel Networks to design and engineer the Hardware/Software for the
         Third Generation Core Network.

         A listing of the information Triton PCS will provide to facilitate
Nortel Network's network design is as follows:

                   CUSTOMER INPUT REQUIREMENTS FOR NEW MARKETS

<TABLE>
<S>                                                                            <C>
Call Mix (M-M, M-L, L-M, L-L)                                                  Current and Forecast
Number of subscribers                                                          Current and Forecast
BHCA (preferably per sector)                                                   Current and Forecast
Erlangs (preferably per sector)                                                Current and Forecast
RF Grade of Service                                                            Current and Forecast
Network Grade of service                                                       Current and Forecast
Percentage roamer traffic                                                      Current and Forecast
Percentage mobile authentication                                               Current and Forecast
Feature Penetration rates (per feature)                                        Current and Forecast
Physical cell characteristics (omni/sector, location, orientation, tilt,       Current and Forecast
antenna type, antenna height, EIRP, frequency plan, macro/metro)
Data subscriber information (GPRS, IS-136, CDPD, up-link and downlink data     Current and Forecast
transfer per sub)
Ancillary systems                                                              Current and Forecast
System busy hour                                                               Current
Atypical implementations (i.e. aircell, semiconductor RMCs)                    Current and Forecast
Frequency plan for adjacent system bordering sites                             Current and Forecast
Mobile type penetrations (portable/mobile)                                     Current and Forecast
Coverage goals (in-building/in-car)                                            Current and Forecast
</TABLE>

b)   CIQ Date - is the date when Nortel Networks has completed its design and
     engineering efforts for a specific Data Center, and receives Triton PCS's
     approval to proceed with implementation.

                                                                   PAGE 22 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
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                                                        CONFIDENTIAL INFORMATION
<PAGE>
c)   Building Ready Date (BRD) - The BRD is a project milestone that indicates
     the building is ready for Nortel Networks to install its Products within
     the structure. All subtrades and subcontractors should have completed their
     work as of BRD.

d)   Cutover Date - The date a commissioning milestone is reached that indicates
     Nortel Networks equipment may be turned over to Triton PCS, and all Nortel
     Networks validation activities as described in Schedule C-4 are completed.

1.4      Network Engineering CIQ

         The Network Engineering CIQ is the formal starting point for the
         collection of Triton PCS's specific information that will be used to
         design and engineer the hardware / software features for the Third
         Generation Core Network. Triton PCS's response to the CIQ will be
         reviewed by Network Engineering representatives in a joint session with
         Triton PCS and Nortel Networks Network Engineering. The results of this
         CIQ will be captured in a Network Design, which will be submitted to
         Triton PCS for its review and approval.

         The Network CIQ addresses the following:

         -    Network plans and analysis

         -    Equipment provisioning

         -    Optional network service requirements

1.5      Database Engineering CIQ

         The Database CIQ is the formal starting point for the collection of
         Triton PCS's specific information that will be used to design and
         engineer the system datafill, translations and dialing plans for Third
         Generation Core Network. The results of this CIQ will be captured in a
         Database Design that will be submitted to Triton PCS for its review and
         approval.

         The Database CIQ addresses the following:

         -    System Translations

         -    Dialing Plan

         -    Trunking Assignments

         -    Equipment Datafill

                                                                   PAGE 23 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
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                                                        CONFIDENTIAL INFORMATION
<PAGE>
2.0      RESPONSIBILITIES TIMELINE

A.  NEW MARKET

<TABLE>
<CAPTION>
                                                                               NORTEL    EVENT COMPLETE WEEK
#                               EVENT                             TRITON PCS  NETWORKS   OF PROJECT SCHEDULE
-                               -----                             ----------  --------   -------------------
<S>                                                               <C>         <C>        <C>
 1   Triton Initial notice of request                                 X
 2   Kickoff meeting for Data Center                                 (X)         X
 3   Initial Network CIQ meeting                                     (X)         X
 4   Network CIQ documented                                           X         (X)
 5   Third Generation Core Network Site Building plans to NORTEL      X
     NETWORKS
 6   Identify Design Issues with Nortel Networks Product                         X
 7   Network CIQ Approved                                             X          X
 8   Building Ready Date established (BRD)                            X         (X)
 9   Triton Design Review Against Nortel Networks Product                        X
10   Third Generation Core Network Floor Plan Design Review and       X         (X)
     Validation
11   Nortel Networks Network Design Complete                         (X)         X
12   Initial Database CIQ                                             X         (X)
13   Database CIQ completed                                           X          X
14   Triton Approval of Initial Design (CIQ Date)                     X         (X)
15   Third Generation Core Network Installation start                            X
16   Third Generation Core Network Power ready                        X
17   Third Generation Core Network Installation complete                         X
18   Database design review and validation                            X         (X)
19   Nortel Networks Database Freeze for Triton's input
20   Cutover                                                         (X)         X
21    Validation Date                                                 X          X
</TABLE>

B.   THIRD GENERATION CORE NETWORK EXTENSIONS

<TABLE>
<CAPTION>
                                                                                    NORTEL      EVENT COMPLETE WEEK
#                                EVENT                                    TRITON   NETWORKS     OF PROJECT SCHEDULE
-                                -----                                    ------   --------     -------------------
<S>                                                                       <C>      <C>         <C>
 1  Triton initial notice of request                                          X         X
 2  Third Generation Core Network Hardware Audit                                        X
 3  Operational Measurement(OM)s collected                                              X
 4  Capacity study performed to determine impact to market/cluster                      X
 5  Impact of updated forecast to Network Elements, RF and Database
    reviewed                                                                            X
 6  Network Design updated and equipment list detailed if required                      X
 7  Triton controlled systems or facility impacts detailed and                          X
      provided to Triton
 8  Network Design reviewed                                                   X         X
 9  Network Design Validation                                                 X
10  Site survey if required                                                             X
11  Floor plan updated if required                                                      X
12  Floor plan design review                                                  X         X
</TABLE>

                                                                   PAGE 24 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-1
                                                        CONFIDENTIAL INFORMATION
<PAGE>
<TABLE>
<CAPTION>
                                                                                    NORTEL      EVENT COMPLETE WEEK
#                                EVENT                                    TRITON   NETWORKS     OF PROJECT SCHEDULE
-                                -----                                    ------   --------     -------------------
<S>                                                                       <C>      <C>         <C>
13  Floor plan Validation                                                     X
14  Database design updated if required                                                 X
15  Building Ready Date                                                       X        (X)
16  Installation start                                                                  X
17  Installation complete                                                               X
18  Database design Validation                                                X        (X)
19  Validation date for extension equipment                                   X         X
</TABLE>

                                                                   PAGE 25 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-1
                                                        CONFIDENTIAL INFORMATION
<PAGE>
                                  SCHEDULE C-2

                     RESPONSIBILITIES MATRIX FOR DATA CENTER
                         ENGINEERING AND IMPLEMENTATION

1.0      RESPONSIBILITIES MATRIX OVERVIEW

         This Schedule C-2 provides descriptions of required Services for the
         Data Center (including, but not limited to, engineering, operations,
         maintenance, and implementation services). Unless otherwise agreed to
         by the Parties in a different agreement or Annex, this Schedule C-2
         also outlines the respective responsibilities of the Parties concerning
         the supply, installation, commissioning, and validation testing of the
         network elements to be supplied under the Agreement. Responsibilities
         Matrix utilizing similar criteria for follow-on systems may be mutually
         agreed to by the Parties at a later date.

         Installation and Commissioning of the network elements shall be
         performed in accordance with the Nortel Networks' Installation and
         Commissioning Specifications which are set forth in Schedule C-3 of
         this Agreement.

         Note:    As used in the matrices in this Schedule C-2, "X" denotes
                  primary responsibility; and "(X)" denotes supporting or
                  collaborating role. Where the responsibilities of Triton and
                  Nortel Networks are indicated as equal in a matrix, the
                  Parties will work together to achieve a successful outcome.

1.1      Nortel Networks Responsibilities - General

         Services other than those specifically described in this Schedule C-2
         shall be available on an as quoted basis.

         Nortel Networks' responsibilities - General

         -    Provision of a plan for system deployment

         -    Progress reports at intervals to be mutually agreed upon in
              writing by the Parties

         -    Development of Validation Test Plan ("VTP"), provision of test
              equipment, and performance of validation tests

         -    Integration testing procedures and test plans

         -    Installation, testing and validation of the Data Center

         -    Base Software for NSS/Core

         -    NSS/Core Installation, Commissioning and Testing

         -    Upon initial Installation:

              -   Network Design and Engineering

              -   Database Engineering

         -    Project Management

         -    Freight

                                                                   PAGE 26 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-2
                                                        CONFIDENTIAL INFORMATION
<PAGE>
         -    Spares

         -    Documentation

         -    One (1) year TAS and Repair and Return

         -    Rebalancing of equipment to accommodate network growth (database
              engineering)

1.2      Triton PCS Responsibilities - General

         Triton PCS's responsibilities shall include:

         -    Supply Nortel Networks with all pertinent capacity requirements
              and necessary system engineering information

         -    Review Nortel Networks' Network Design and make recommendations

         -    Site search and evaluation

         -    Site acquisition

         -    Site preparation (all civil works activities, permits, ordering of
              leased lines additional and, AC and DC power)

         -    Approval or rejection of results of validation tests, based on VTP
              test case pass/fail criteria as applicable

         -    Real estate, Buildings, structures.

         -    Zoning and Site acquisitions.

         -    External BTS equipment: towers, antennae, shelters for indoor
              sites, RF cable systems.

         -    Lightning protection/grounding.

         -    AC and or DC power systems and batteries.

         -    HVAC systems.

         -    Fire suppression and fire detection.

         -    DSX panels.

         -    RF Plan, Design, and Engineer (unless purchased from Nortel
              Networks)

         -    RF Network Design and ongoing RF optimization (unless purchased
              from Nortel Networks)

         -    Field maintenance

         -    OSS.

                                                                   PAGE 27 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-2
                                                        CONFIDENTIAL INFORMATION
<PAGE>
         -    Locations/Presence Servers

         -    PBX

         -    Billing/mediation systems other than SDM and CGF

         -    Tandem & LD switching

         -    IWFs

         -    STPs/SCPs

         -    Paging systems

         -    SMS systems

         -    Voice mail systems

         -    External Authentication Centers

         -    Pre-paid voice and data

         -    Handsets

         -    Transmission equip: MUX, channel banks, microwave, DACS, echo
              cancellers, etc.

         -    Data backbone: LAN/WAN, ATM/IP/Ethernet

         -    Extraordinary delivery requirements (helicopters, bulldozers,
              cranes)

         -    Relocation of equipment between buildings

         -    E911 Phase 2 hardware

         -    Traffic analysis tools

         -    AMR

2.0      THIRD GENERATION CORE NETWORK RESPONSIBILITIES

           The Parties will mutually agree on a design plan to implement the
           Third Generation Core Network, consistent with Triton PCS's annual
           Growth Forecast and the Fundamental Network Design Plan. The
           following sections outline the responsibilities for services and
           materials for the Third Generation Core Network

2.1      Services - Third Generation Core Network systems

           This section is separated into two (2) sets of activities: Final
           Third Generation Core Network Design and Implementation of the Third
           Generation Core Network Design.

                                                                   PAGE 28 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-2
                                                        CONFIDENTIAL INFORMATION
<PAGE>
2.1.1      Final Third Generation Core Network Design

<TABLE>
<CAPTION>
                                                                                           Triton        Nortel
                                                                                                        Networks
                                                                                           ------       --------
<S>                                                                                        <C>          <C>
             1.    Schedule planning meetings.                                              (X)            X
             2.    Define Third Generation Core Network requirements for all system         (X)            X
                   elements including design specifications.
             3.    Define non-Nortel Networks supplied administrative system                 X            (X)
                   requirements, i.e., billing system, network management system.
             4.    Provide customer questionnaires for each system element                                 X
             5.    Fill out and return questionnaires to Nortel Networks.                    X            (X)
             6.    Provide input from RF design.                                             X
             7.    Develop final Third Generation Core Network system design.               (X)            X
             8.    Prepare detailed, infrastructure requirement lists and provide to                       X
                   Triton.
</TABLE>

2.1.2      Implementation Third Generation Core Network Design

<TABLE>
<CAPTION>
                                                                                           Triton        Nortel
                                                                                                        Networks
                                                                                           ------       --------
<S>                                                                                        <C>          <C>
             1.     Provide equipment specifications, e.g., interfaces, capacity, etc.                     X
             2.     Provide Telco interconnect specifications.                                             X
             3.     Submit revised system requirements if needed                             X
             4.     Design and size Network Design configuration based upon customer                       X
                    requirements and system interconnects.  Provide a copy to Triton.
             5.     Review and approve Network Design, including equipment and               X
                    interface compatibility.
             6.     Revise system design if required.                                                      X
             7.     Provide Third Generation Core Network facilities  (according to          X            (X)
                    network design) including zoning, permitting, and civil work as
                    required.
             8.     Produce civil works drawings for system elements.                        X            (X)
             9.     Supply appropriate transmission leased lines facilities for              X
                    testing.
             10.    Provide data communication network between applicable network            X            (X)
                    elements and Third Generation Core Network elements.
             11.    Provide local / wide area network for communication between              X            (X)
                    workstations and applicable network elements.
             12.    Perform transmission system analysis.                                    X            (X)
             13.    Supply transmission interface requirements for network elements          X
                    supplied by seller (i.e. DS3, DS1, fiber, and others).
             14.    Specify requirements for all transmission equipment indicating           X
                    suggested vendors (i.e. Tellab MUX, ADC, CSU).
</TABLE>

                                                                   PAGE 29 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-2
                                                        CONFIDENTIAL INFORMATION
<PAGE>
<TABLE>
<CAPTION>
                                                                                           Triton        Nortel
                                                                                                        Networks
                                                                                           ------       --------
<S>                                                                                        <C>          <C>
             15.    Order appropriate transmission circuits and equipment for testing.       X
             16.    Provide equipment and software for system elements.                                    X
             17.    Provide and install Nortel Networks Third Generation Core Network                      X
                    equipment and software.
             18.    If required, provide temporary AC / DC power, and HVAC, and              X            (X)
                    equipment for testing and conversion.
             19.    If required, install temporary DC powerplant including batteries.        X            (X)
             20.    Test system installation. Nortel Networks supplied equipment only                      X
             21.    Approve system installation.                                             X
</TABLE>

2.1.3      Site Search

<TABLE>
<CAPTION>
                                                                                           Triton        Nortel
                                                                                                        Networks
                                                                                           ------       --------
<S>                                                                                        <C>          <C>
             1.    Search for and identify possible sites.                                   X
             2.    Pre-survey selected locations including measuring ground                  X             (X)
                   resistivity.
             3.    Hold technical review at sites with Engineering, site acquisition         X             (X)
                   and preparation specialists and Nortel Networks representative to
                   identify all technical requirements from all Parties to determine
                   feasibility of site.
             4.    Examine site for suitability, noting ease of access for equipment.       (X)             X
             5.    Make site selection or perform site search again.                         X
             6.    Identify and evaluate site access and security.                           X
             7.    Negotiate terms and conditions of lease, or purchase, with site           X
                   owners.
             8.    Finalize lease, or purchase, contract.                                    X
</TABLE>

2.1.4      Site Preparation

<TABLE>
<CAPTION>
                                                                                           Triton        Nortel
                                                                                                        Networks
                                                                                           ------       --------
<S>                                                                                        <C>          <C>
              1.      Define technical system requirements, power requirements, and                        X
                      environmental concerns including, but not limited to floor
                      space, floor loading, and heat load.
              2.      Determine overhead or under floor cabling.                             X            (X)
              3.      Determine adequate raised floor or not.                                X            (X)
              4.      Select air-conditioning system to be used.                             X
              5.      Obtain requirements for equipment rooms, power, standard               X
                      connectors, levels, impedance's etc. and provide copy to Nortel
                      Networks.
</TABLE>

                                                                   PAGE 30 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-2
                                                        CONFIDENTIAL INFORMATION
<PAGE>
<TABLE>
<CAPTION>
                                                                                           Triton        Nortel
                                                                                                        Networks
                                                                                           ------       --------
<S>                                                                                        <C>          <C>
              6.      Design and furnish equipment room with space for Telco line            X
                      connections and provide layout drawings (site plans) to Nortel
                      Networks.
              7.      Provide layout design for equipment installation.                                    X
              8.      Produce civil works drawings.                                          X
              9.      Review and approve layout plan for supplier equipment.                 X
              10.     Complete detailed installation designs (as built) for all                            X
                      Nortel Networks-required system elements.
              11.     Obtain necessary permission from authorities.                          X
              12.     Prepare request for proposal (RFP) documents for construction          X
                      bids.
              13.     Evaluate and select construction contractors.                          X
              14.     Supervise site construction.                                           X
              15.     Provide fire protection system with alarms.                            X
              16.     Install security alarms.                                               X
              17.     Install external alarms.                                               X
              18.     Provide alarm panel.                                                   X
              19.     Determine emergency power back-up requirements based on size,          X            (X)
                      market requirements, and reserve capacity.
              20.     Provide backup power system, including batteries and rectifiers        X            (X)
              21.     Provide backup power generators, fuel accommodations, and fuel         X
                      as required.
              22.     Perform all civil works preparation for power plant.                   X
              23.     Provide sufficient leased lines to Telco termination point             X
                      (Telco to provide).  Based on the exception of increased
                      traffic only.
              24.     Provide main power.  AC and DC feeds.                                  X
              25.     Approve completed site construction.                                   X
              26.     Inspect buildings for readiness and approve completed sites.           X            (X)
</TABLE>

2.1.5       Third Generation Core Network Hardware and Software

<TABLE>
<CAPTION>
                                                                                           Triton        Nortel
                                                                                                        Networks
                                                                                           ------       --------
<S>                                                                                        <C>          <C>
             1.     Specify all system element equipment per site based on approved                         X
                    fixed system design, including trunk and slot assignments.
             2.     Prepare plan and procedures for the testing of system element and       (X)             X
                    integration and provide to Triton for review.  Test plan shall
                    include VTP for Third Generation Core Network. elements
             3.     Review test plan, agree to changes and approve test plans.               X
</TABLE>

                                                                   PAGE 31 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
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<PAGE>
<TABLE>
<CAPTION>
                                                                                           Triton        Nortel
                                                                                                        Networks
                                                                                           ------       --------
<S>                                                                                        <C>          <C>
             4      Tests to be completed following installation of equipment.               X
             5.     Connect fire, security, and external alarms to alarm panel.              X
             6.     Connect alarm panel to network elements.                                 X              X
             7.     Provide to Nortel Networks a schedule with building-ready dates.         X
             8.     Provide for temporary storage of incidental equipment.                                  X
             9.     Provide for warehouse storage for system elements.                                      X
             10.    Provide Triton with schedule of non civil and equipment delivery                        X
                    dates.
             11.    Establish start of work and completion dates                             X              X
             12.    Review, change or approve installation schedule and plans.               X              X
             13.    Clean floor area.  This must be done prior to the unpacking of           X
                    system elements.
             14.    Arrange for hauling and hoisting (including special permits for          X
                    parking, street closures, etc.).
             15.    Deliver to and unpack all system element equipment at sites.                            X
             16.    Inventory all system element hardware at site                           (X)             X
             17.    Furnish installation tools, test equipment and supplies.  Tools                         X
                    to be retained by Nortel Networks at project end.
             18.    Install all system element equipment.  Supplied by Nortel Networks                      X
             19.    Remove installation trash daily.                                                        X
             20.    Maintain security during installation                                    X
             21.    Provide and install MDFs at all network elements.                        X
             22.    Provide connection from MDF to Telco connection point                    X
             23.    Provide access and leased line test point to Telco (monitor test         X
                    points to Telco).
             24.    Nortel Networks to provide lease line specification.                                    X
             25.    Review test procedures (change or approve).                              X
             26.    Perform access and leased line tests and record results.                 X
             27.    Request repair as necessary.                                             X
             28.    Escalate repair request as necessary to maintain schedule.               X
             29.    Perform VTPs.                                                           (X)             X
             30.    Record results of tests for review.                                     (X)             X
             31.    Re-run failed test(s) per VTP test case criteria as applicable.         (X)             X
             32.    Review test results and add minor exceptions to a punch list.            X             (X)
             33.    Provide written status reports during installation.                                     X
             34.    Provide material list to Triton for the site.                                           X
             35.    Accept documentation as provided or request changes, additions.          X
             36.    Prepare punch list.                                                      X             (X)
</TABLE>

                                                                   PAGE 32 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
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<PAGE>
<TABLE>
<CAPTION>
                                                                                           Triton        Nortel
                                                                                                        Networks
                                                                                           ------       --------
<S>                                                                                        <C>          <C>
             37.    Correct deficiencies in punch list.                                     (X)             X
             38.    Turn up equipment for service.                                           X             (X)
             39.    Accept equipment for conditional validation.                             X              X
             40.    Monitor performance.                                                     X              X
             41.    Perform corrective action as necessary.                                  X              X
             42.    Develop and install non-Nortel Networks administrative system            X
                    interfaces and software.
             43.    Provide interface documentation with regard to Nortel                                   X
                    Networks-provided equipment.
             44.    Develop test plan for interface testing of non-Nortel Networks           X
                    administrative systems.
             45.    Review and comment on interface testing of non-Nortel Networks           X             (X)
                    administrative systems.
             46.    Perform interface tests according to test plan (not part of              X
                    Validation Tests).
             47.    Supply replacement spare parts as ordered by Triton based on                            X
                    recommended list provided by Nortel Networks.
             48.    Provide CDRs to Triton on call models for Triton billing                                X
                    validation
</TABLE>

2.1.6      Leased Lines

<TABLE>
<CAPTION>
                                                                                           Triton        Nortel
                                                                                                        Networks
                                                                                           ------       --------
<S>                                                                                        <C>          <C>
           1.       Identify traffic capacity of system elements.                                           X
           2.       Identify end points for lease lines.                                     X
           3.       Identify diverse routing requirements.                                   X
           4.       Provide dimensioning rules and interface requirements.                   X             (X)
           5.       Develop schedule of required in-service date for each circuit.           X
           6.       Enter lease line orders to Telco and conduct follow-up.                  X
           7.       Notify Nortel Networks if schedules change due to Telco delay.           X
           8.       Provide access and oversee Telco installation of leased lines.           X
           9.       Perform short-term (approximately 1 hour) bit error rate and             X
                    other line testing.
           10.      Review test results and determine problem resolution for lease           X
                    line errors.
</TABLE>

2.2        Materials - Third Generation Core Network

2.2.1      Third Generation Core Network Site Equipment
<TABLE>
<CAPTION>
                                                                                       Supply     Install    Test
                                                                                       ------     -------    ----
<S>                                                                                    <C>        <C>        <C>
               1.       All Nortel Networks required engineered network elements          N          N        N
                        hardware and software
               2.       Standby generator and no break & transfer Third Generation        T          T        T
                        Core Network
</TABLE>

                                                                   PAGE 33 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-2
                                                        CONFIDENTIAL INFORMATION
<PAGE>
<TABLE>
<CAPTION>

                                                                                           Supply    Install    Test
                                                                                           ------    -------    ----
<S>                     <C>                                                                <C>        <C>       <C>
               3.       Main power, AC and DC feeds                                          T          T        T
               4.       Lighting                                                             T          T        T
               5.       Wall sockets for general use                                         T          T        T
               6.       Grounding system, tie to existing ground system                      N          N        N

               7.       Cable trays and supporting steelworks  within Third                  N          N        N
                        Generation Core Network room (s)
               8.       MDF                                                                  T          T        T
               9.       Alarm distribution panel for external alarms                         T          T        T
               10.      Cabling between Network Elements and DSX in Third                    N          N        N
                        Generation Core Network room (s)
               11.      Cabling between DSX and Telco termination point                      T          T        T
               12.      Workstation and printer cabling to system elements supplied          N          N        N
                        by Nortel Networks
               13.      Rectifiers, batteries, cabling to BDF                                T          T        T
               14.      Modems per system design                                             N          N        N
               15.      External alarm cabling from MSC to alarm panel                       T          T        T
               16.      Ground return cabling to PDC                                         N          N        N
               17.      Rectifier system                                                     T          T        T
               18.      DC distribution and Triton BDF in Third Generation Core              T          T        T
                        Network room (s)
               19.      Power cabling from the BDF to the PDC(s)                             N          N        N
               20.      Batteries with rack                                                  T          T        T
              20A.      Cut, lug and terminate power cables to Nortel Networks PDCs          N          N        N
               21.      UPS system for the SWs and peripheral devices                        T          T        T
               22.      Battery load testing                                                 T          T        T
               23.      Connect power cables to individual Third Generation Core             N          N        N
                        Network cabinets
</TABLE>

                                                                   PAGE 34 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-2
                                                        CONFIDENTIAL INFORMATION
<PAGE>
                                  SCHEDULE C-3

                         INSTALLATION AND COMMISSIONING

1.0        This Schedule defines the work requirements and responsibilities of
           both Nortel Networks and Triton PCS which are necessary to engineer,
           furnish, deliver, install and test the Products furnished hereunder
           at all Triton PCS locations where Products acquired under this
           Agreement are to be installed ("Installation Site(s)"), unless
           otherwise specified in another agreement between the Parties. Nortel
           Networks' obligation to perform the Services described hereunder
           assumes receipt of the approval by Triton PCS of Nortel Networks'
           Network Design. Certain duties to be performed by Triton PCS shall
           serve as a condition precedent to Nortel Networks' obligations
           hereunder. In certain instances, depending on the Products/Services
           being supplied, it may be necessary to modify the responsibilities
           identified under this Schedule C-3. When this occurs, the parties
           will finalize such modified responsibilities at the Customer Input
           Questionnaire ("CIQ") meeting as described in Section 2.3 below.

2.0        Nortel Networks' Responsibilities

           Nortel Networks, or its designated subcontractor, shall perform the
           following:

2.1        Engineer, furnish, deliver, install and test all Products in
           accordance with the applicable Nortel Networks Product Specifications
           and in accordance with this Schedule C-3.

2.2        In conjunction with a Third Generation Core Network Installation,
           perform a site visit on or before the date as specified in the
           Project schedule to Triton PCS's facilities to review the information
           provided on the applicable Market Requirement Questionnaire, survey
           the Installation Sites(s) and generate floor plans to be used to
           engineer and install the Products. Any Services outside this
           Statement of Work requested by Triton PCS as a result of the CI
           meeting shall be quoted by Nortel Networks, and if such quote is
           accepted by Triton PCS, will be documented in a change order.

2.3        Prior to Installing a Third Generation Core Network, provide draft
           floor plans for the Third Generation Core Network Installation Site
           to Triton PCS on or before the date as specified in the project
           schedule. Floor plan layouts will be finalized at the CIQ meeting.

2.4        Pursuant to Section 2.15 below, ship the Products to the Installation
           Site location(s) on or before the date as specified in the project
           schedule. In the event an Installation Siteis not made ready by
           Triton PCS in accordance with the project schedule, delivery will be
           delayed.

2.5        On or before the commencement of Installation as specified in the
           project schedule, begin Installation of the Products in accordance
           with the applicable sections of the Nortel Networks Networks
           Installation Manuals and the engineering specifications and drawings
           applicable to the Products.

2.6        Provide all tools, installation and test equipment necessary for
           performance of Nortel Networks' obligations listed herein. Any use of
           Nortel Networks' tools and/or test equipment by Triton PCS must be
           approved by Nortel Networks and may subject Triton PCS to additional
           charges.

                                                                   PAGE 35 OF 42
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                                                        CONFIDENTIAL INFORMATION
<PAGE>
2.7        Comply with Triton PCS's security regulations for the Installation
           Site(s).

2.8        Furnish Nortel Networks' generally available System Documentation, on
           or before the date as specified in the project schedule.

2.9        Engineer, furnish, install and test the following materials required
           to connect from Nortel Networks' provided Products to the demarcation
           points defined below:

2.9.1      Telco Facilities Demarcation

           The Telco Facility demarcation point is defined as the Main
           Distribution Frame (MDF) and shall be provided by Triton PCS.
           Terminal blocks required for Products, VF, data, and alarm cables
           will be provided and installed by Nortel Networks on Triton PCS's
           MDF. Cable (standard length) shall be provided by Nortel Networks per
           Installation Site to connect the Products to the MDF. Nortel Networks
           will cross connect the jumpers as directed by Triton PCS. Appropriate
           information must be supplied by Triton PCS in such cases. Additional
           cable and associated materials, if required, will be provided at
           Triton PCS's expense. Nortel Networks shall terminate the Third
           Generation Core Network DS-1 cables to Triton PCS-provided DSX-1
           panel. Triton PCS shall be responsible for bringing all other DS-1
           facilities to the DSX-1.

2.9.2      DC Power System Demarcation

           The DC power system demarcation point is defined as the DC power
           board fuse(s) and/or breaker(s). Wire for each power and return lead
           shall be provided by Nortel Networks for each Installation Site to
           connect to the Products. Additional wire and associated materials, if
           required, will be provided at Triton PCS's expense. DC fuses and/or
           breakers and any other part of the power board or DC power system
           (including inverters) are not provided by Nortel Networks. The
           required fuse and/or breaker quantities and sizes are available upon
           request.

2.9.3      Alarm System Demarcation

           The Alarm System demarcation point is defined as the Nortel Networks
           furnished alarm terminal block. Alarm cable shall be provided by
           Nortel Networks per Installation Site to connect Products alarms to
           the terminal block. Cable shall also be provided to connect Nortel
           Networks' alarm display and control panel at the Third Generation
           Core Network. Additional cable and associated materials, if required,
           will be provided at Triton PCS's expense. Any alarm points that
           Triton PCS may want to take to an external alarm system will be done
           at Triton PCS's expense.

2.10       At each Installation Site, provide wire for each ground lead
           extending from Products to the Main Ground Bar (MGB).

2.11       During a Third Generation Core Network Installation, Nortel Networks
           shall furnish, install and test one VDU, one printer, one Norstar KSU
           equipped with two telephone sets and associated cable with terminal
           blocks. Any additional items will be provided and installed at Triton
           PCS's expense.

2.12       Complete the Installation and Commissioning on or before the date as
           specified in the applicable project schedule.

2.13       Delivery and Installation Assumptions

                                                                   PAGE 36 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-3
                                                        CONFIDENTIAL INFORMATION
<PAGE>
           Nortel Networks shall transport the Products by truck or van to the
           Installation Site. Delivery requiring extraordinary requirements
           (e.g., helicopters, bulldozers, cranes) to facilitate delivery will
           be at additional charge to Triton PCS. Nortel Networks shall invoice
           Triton PCS for such additional charges on a "pass-through" basis
           only, excluding any markup or administrative charges by Nortel
           Networks.

3.0        Triton PCS's Responsibilities

           Triton PCS or its designated subcontractor, shall perform the
           following:

3.1        Provide overall program management and engineering functions related
           to Triton PCS's responsibilities listed in this Agreement. This
           includes, but is not limited to, schedules for other Products
           suppliers, telco circuit orders and engineering relating to
           Installation Site locating, frequency planning coordination and RF
           propagation studies and coverage verification.

3.2        Provide all real estate property, environmental approvals, leases,
           rents, and all permits and licenses, including but not limited to,
           Certificates of Occupancy and FCC, construction, zoning and FAA
           permits excluding any applicable permits required in the normal
           course of Nortel Networks' doing business.

3.3        Gather the information necessary to complete the Customer Information
           Questionnaires on or before the date as specified in the project
           schedule.

3.4        Review, approve and return Nortel Networks' draft floor plan for each
           Installation Site on or before the date as specified in the
           applicable project schedule.

3.5        Prepare the Installation Site(s) as follows:

3.5.1      Provide all required architectural work, civil engineering and
           construction work including, but not limited to, site preparation
           such as grading, tree removal, roads, tower and building foundations,
           and fencing.

3.5.2      Provide adequate building facilities, utilities, space and
           environmental conditions for Nortel Networks' Installation personnel
           and the Products as well as any other Triton PCS equipment on or
           before the date as specified in the project schedule. The minimum
           building requirements are given below. The Products environmental and
           space requirements are set forth in Section 4.0 of this Schedule. All
           Installation Sites assume and shall provide safe access for
           Installation personnel taking into account the kind of activity to be
           performed, the location of the Site, and inclement weather
           conditions.

3.5.3      Building facilities shall be provided with air-conditioning, heating,
           ventilation, lighting and have adequate working space that is free of
           debris and other clutter which might hinder the Installation. The
           building must be dry and free from dust and in such condition as not
           to be hazardous to Nortel Networks personnel or the Products and
           materials to be installed. Nortel Networks shall gather and separate
           debris from usable material, mark accordingly, and place in an area
           identified by Triton PCS for Triton PCS's pick-up and disposition.

3.5.4      Provide any building renovations, computer floors and wall
           penetrations. Provide openings (including elevator space where
           required) to allow the Products to be placed

                                                                   PAGE 37 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-3
                                                        CONFIDENTIAL INFORMATION
<PAGE>
           into position. If required and on a one time basis per site, Nortel
           Networks will supply the necessary labor to move Triton PCS's
           existing equipment from one location to another in order to make room
           for the Products. However, this activity must be performed under the
           supervision and authorization of Triton PCS's on-site personnel.

3.5.5      Provide and install adequate fire fighting apparatus at each
           Installation Site. Activation of a water fire extinguishing system
           may void the warranty on the Products.

3.5.6      Provide and install all required commercial AC power and associated
           fixtures including, but not limited to, AC panels, AC circuit
           breakers, AC fuses, building wiring, convenience outlets, lighting
           and AC grounds. All electrical facilities shall conform to the latest
           issue of the National Electrical Code (NEC) and any local codes to
           insure a safe work area.

3.5.7      Provide adequate security for Nortel Networks personnel, the
           Products, installation materials and tools at each Installation Site
           and/or storage facility, in accordance with Triton PCS's normal
           security procedures.

3.5.8      Provide three telephone lines (two for modems and one telephone set),
           and service (dial tone from a local exchange) at each Third
           Generation Core Network Installation Site in accordance with the
           project schedule.

3.6        Engineer, furnish, deliver, install and test the following in
           accordance with the project schedule in a professional manner:

3.6.1      All overhead cable trays at each Installation Site.

3.6.2      An MDF for each Installation Site. The MDF can be a free standing
           rack or a plywood panel board (4' x 8' x 5/8" typical) for wall
           mounting.

3.6.3      A single point grounding system, including an MGB and all subsequent
           connections to the ground field shall be provided for the Products at
           each Installation Site. The ground fields shall measure 5 ohms or
           less.

3.6.4      A negative 48 VDC power system and a 500VA DC to AC inverter for each
           Third Generation Core Network including all required fuses and/or
           circuit breakers for all Products and any Nortel Networks provided
           Products. This includes any alarm cables, terminal blocks and AC
           power wiring.

3.6.5      All alarm sensors and wiring, other than those which are included in
           Products, and connect to Triton PCS provided alarm terminal blocks.
           This includes, but is not limited to, open door, high/low
           temperature, tower lights and smoke detector alarm sensors.

3.7        Provide Nortel Networks' designated personnel free access to each
           Installation Site as required to perform Nortel Networks' obligations
           under this Agreement. Access is to be provided as follows:

3.7.1      Adequate roads and parking to each Installation Site for delivery
           vans and two-wheel drive vehicles.

3.7.2      All required security passes and clearances.

                                                                   PAGE 38 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-3
                                                        CONFIDENTIAL INFORMATION
<PAGE>
3.7.3      24 hours/day, 7 days a week access to the Products. Nortel Networks
           shall provide Triton PCS twenty-four hours' advance notice of the
           need for access. Telephonic notification is permissible.

3.8        Provide or bear the cost for special Products required to deliver
           Products to the Installation Site(s) such as bulldozers, cranes,
           helicopters, etc.

3.9        Provide and install all materials required to adequately support and
           brace the Products in accordance with the seismic risk zone of each
           Installation Site.

3.10       Triton PCS shall provide free network access (air time and long
           distance) to Nortel Networks for a quantity of six (6) Nortel
           Networks personnel during the Installation, testing, and service
           period of the project. The purpose of such service will be to support
           the Products Installation for testing purposes, business
           communications, and safety needs of Nortel Networks personnel. The
           free service shall include, but not be limited to, activation
           charges, air time, long distance, and roamer charges. Nortel
           Networks' use of such free telephone service shall be subject to
           reasonable audit, at Triton PCS's discretion. All traffic generated
           by Nortel Networks personnel will be limited to business and Product
           testing purposes only. Any personal calls will be the responsibility
           of Nortel Networks.

3.11       Triton PCS and/or its representatives are encouraged to be present
           for preliminary testing and Turnover.

4.0        Product Environmental Requirements

4.1        All Installation Sites shall be prepared by Triton PCS to allow for
           operation of the Products in accordance with Nortel Network's
           standard environmental requirements for such Products. Nortel
           Networks shall provide such environmental requirements to Triton PCS
           in connection with the site installation planning process. Operation
           of the Products outside such requirements may void the warranty.

4.1.1      In the event Triton PCS elects to deploy Nortel Networks' Products in
           areas where Triton has reason to believe that the normal
           environmental parameters for Nortel Networks' Products may be
           exceeded, Triton PCS and Nortel Networks mutually agree on the
           conditions in which the warranty may remain in effect.

5.0        Assumptions

           Nortel Networks' schedules assume continuous performance of Services
           without delay or interruption. In the event that a delay or
           interruption occurs for reasons not attributable to Nortel Networks,
           Triton PCS and Nortel Networks shall agree upon a revised project
           schedule.

                                                                   PAGE 39 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-3
                                                        CONFIDENTIAL INFORMATION
<PAGE>
                                  SCHEDULE C-4

                              VALIDATION TEST PLAN

OVERVIEW (We will modify this statement to refer to AWS approved ATP)
The tests set out below ("Validation Tests") shall be conducted by Nortel
Networks after Commissioning is completed on the applicable Products, to confirm
that Third Generation Network elements function as a System. Upon completion of
such Validation Tests, the parties shall sign-off on each test sheet, if
acceptable. The below tests refer to Nortel Networks test procedures. A detailed
list of the tests shall be provided to Triton PCS prior to commencement of
testing.

1.   Call Processing Testing

     Nortel Networks performs a variety of basic tests to ensure that calls are
     completed from mobile to land, mobile to mobile, and land to mobile. This
     is dependent on the availability of the 3rd party access network to
     complete these tests.

2.   Vertical Feature Testing

     A variety of features such as call forward, call waiting, call transfer,
     and three way calling are tested to demonstrate functionality. Features to
     be tested are mutually agreed to prior to commencement. This is dependent
     on the availability of the 3rd party access network as well as other
     network elements, to complete these tests.

3.   PSTN (Public Switching) Interface Testing

     Testing of long distance calling is performed on a variety of long distance
     features including long distance origination, retrieval of mailbox
     messages, and international call origination. This is dependent on the
     availability of the 3rd party access network to complete these tests.

4.   Final Reports

     At the completion of the project, Nortel Networks compiles a final report
     that summarizes all tests performed over the course of the project. Nortel
     Networks' Network Integration team reviews the document with Triton PCS
     personnel, and explain the specific actions taken to correct any
     inconsistencies. This review may be beneficial as a training forum for
     Triton PCS technical personnel.

                                                                   PAGE 40 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-4
                                                        CONFIDENTIAL INFORMATION
<PAGE>

                        [Page Intentionally Left Blank]

                                                                   PAGE 41 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-4
                                                        CONFIDENTIAL INFORMATION

<PAGE>
                                  SCHEDULE C-5

             COVERAGE, INTERFERENCE AND THIRD-PARTY RESPONSIBILITIES

1.0      Nortel Networks shall have no liability as a result of non-performance,
         failures or poor performance of the System caused by, resulting from or
         attributable to Triton PCS-provided designs, specifications or
         equipment configuration requirements. Nortel Networks may rely upon and
         utilize any Triton PCS-provided designs, studies, specifications or
         requirements, including but not limited to microwave path studies, RF
         propagation studies and tower location and loading requirements,
         without liability therefor. If Nortel Networks becomes aware of any
         apparent deficiencies in any such Triton PCS-provided designs, studies,
         specifications or requirements, Nortel Networks shall advise Triton PCS
         thereof and shall not thereafter proceed with any related Network
         design until any such deficiencies are resolved or until Triton PCS and
         Nortel Networks agree to a method to correct such deficiencies or agree
         to proceed without regard to such deficiencies and without liability of
         Nortel Networks therefor.

1.1      Nortel Networks shall not be responsible for any failures or
         inadequacies of performance resulting from equipment not supplied and
         installed by Nortel Networks or Nortel Networks' agents or
         subcontractors pursuant to this Agreement. Nortel Networks shall not be
         responsible for interference or disruption of service caused by
         operation of other radio systems, lightning, motor ignition or other
         similar interference not reasonably anticipated or over which there is
         not reasonable control. In the event Triton PCS utilizes facilities or
         services supplied by others such as common carrier circuits, antennas
         or towers, Triton PCS shall have total responsibility for the
         availability or adequacy of such services or facilities.

1.2      The parties recognize that operation of Third Generation Network
         Equipment alone or near other radio transmitters may result in
         interference to Third Generation Network Equipment or to other
         stations. Nortel Networks shall provide to Triton PCS, upon its
         request, reasonable technical assistance to identify the cause of any
         such interference. In connection with any interference problems, if
         Nortel Networks was not responsible for RF/Network engineering design,
         Triton PCS shall contact the design firm or such other third party
         vendor or supplier as it deems appropriate to determine whether the
         problem is a design or an Equipment problem. To the extent such
         interference is caused by malfunction of Equipment, or failure of
         Equipment to meet the Specifications, such correction shall be at
         Nortel Networks sole cost and expense. If Nortel Networks was not
         responsible for such interference or malfunction of Equipment, Nortel
         Networks shall be paid for all costs and expenses incurred in
         correcting the cause of interference and/or malfunction of Equipment.

                                                                   PAGE 42 OF 42
                                                 GSM/GPRS SUPPLEMENT TERMS ANNEX
                                                                    SCHEDULE C-5
                                                        CONFIDENTIAL INFORMATION

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