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                                                                   EXHIBIT 10.28

                        VERIZON INFORMATION SERVICES INC.
                         c/o Verizon Communications Inc.
                           1095 Avenue of the Americas
                                   41st Floor
                            New York, New York 10036

                                                               February 14, 2002

TSI Telecommunication Services Inc.
201 N. Franklin Street, Suite 700
Tampa, Florida  33602

TSI Telecommunication Holdings, Inc.
c/o GTCR Golder Rauner, L.L.C.
6100 Sears Tower
Chicago, Illinois  60606

       Reference is made to that certain Amended and Restated Agreement of
Merger dated as of December 7, 2001, as amended and restated as of January 14,
2002, by and among TSI Telecommunication Holdings, Inc., a Delaware corporation
("Buyer"), TSI Merger Sub, Inc., a Delaware corporation, TSI Telecommunication
Services Inc., a Delaware corporation (the "Company"), and Verizon Information
Services Inc., a Delaware corporation ("Seller") (as amended through the date
hereof, the "Merger Agreement"). Capitalized terms used herein without
definition have the meanings set forth in the Merger Agreement.

       In consideration for the mutual agreements set forth herein and Verizon
Information Technologies Inc.'s ("VITI") agreement to sign the Mainframe
Computing Services Agreement dated as of February 14, 2002 between VITI and the
Company (the "Mainframe Agreement") and the Distributed Processing Services
Agreement dated as of February 14, 2002 between VITI and the Company (the
"Distributed Agreement"):

       (a)  On the date hereof, Verizon will pay $500,000 in the aggregate to
            acquire in its name third party software licenses necessary to allow
            Verizon to provide services to the Surviving Corporation under the
            Mainframe Agreement and the Distributed Agreement, and, to the
            extent the cost of such third party software licenses is less than
            $500,000, Verizon shall pay the Surviving Corporation the
            difference. Except as set forth in the immediately preceding
            sentence or as expressly referenced in the Mainframe Agreement or
            the Distributed Agreement or for any third party software licenses
            identified after the date hereof, the Company shall pay all costs
            and expenses relating to the acquisition of any and all licenses
            used by any party in the performance of services under the Mainframe
            Agreement and the Distributed Agreement.

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       (b)  Buyer and the Company agree that any software (including without
            limitation the operating system) used by Verizon or its Affiliates
            (other than the Company) to provide services to the Company, under
            the Mainframe Agreement (i) shall to the extent such software
            exists, be deemed to have been disclosed and included in Schedule
            2.7(a) of the Seller Disclosure Schedules of the Merger Agreement
            and (ii) shall not (other than for: (1) the materials and
            information expressly required to be provided to Company pursuant to
            the Mainframe Agreement; (2) electronic format of all Company data
            included in third party libraries and history relating to such
            Company data; (3) all materials and information VITI proposes to
            provide to Company as set forth in the TSI Mainframe Migration
            Support proposal dated February 11, 2002; and (4) all other data and
            materials agreed in writing by Company and Seller) be the subject of
            any ownership, rights or licenses under the Intellectual Property
            Agreement, and shall not form the basis for any claim against
            Verizon or its Affiliates that any claims pursuant to the Merger
            Agreement or Intellectual Property Agreement that Buyer, the
            Company, the Surviving Corporation or any vendor of the foregoing
            have any rights or licenses or the right of access to, and Verizon
            shall have no obligation to deliver to the Company or its vendor(s)
            or license for use, such software (including without limitation the
            operating system) that is used in the provision or use of any
            services provided by Verizon or its Affiliates (other than the
            Company) to the Company and is owned, in whole or in part, by
            Verizon, Verizon Data Services Inc., VITI, any of their Affiliates
            (other than the Company) or any third party. Buyer and the Surviving
            Corporation hereby waive and release Verizon and its Affiliates from
            the foregoing claims.

       (c)  For a period of sixty (60) days from the Effective Date (as defined
            in the Mainframe Agreement), Seller shall cause VITI to continue to
            provide the Company with access to the SAP, AP and Intranet
            applications including Internet email services, relay of internet
            mail through interwan, virus scanning, content filtering on internet
            mail, intranet access, domain name and firewall protection. All
            costs associated with the use of third party software in the
            provision of the foregoing shall be as set forth above. During that
            sixty (60) day period at no cost to the Company, Seller shall cause
            VITI to make commercially reasonable efforts to identify an
            alternative solution to the Company for such services. In the event
            VITI is unable to identify such an alternative solution, or the
            Company rejects VITI's recommended alternative solution, Seller
            shall cause VITI to continue to provide access to the Company, but
            only so much of such access as VITI is permitted to provide without
            the payment of any compensation or consideration to any third party,
            until June 1, 2002. Seller shall cause VITI to provide such access
            to the Company, commencing with the Effective Date, on a
            pass-through cost basis. Any and all costs associated with the
            implementation of an alternative solution will be the responsibility
            of the Company.

       (d)  The Company shall pay all costs and expenses relating to the
            acquisition of any and all additional hardware requested after the
            Closing Date by the Company to be used by any party in the
            performance of services under the Mainframe Agreement and the
            Distributed Agreement.

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       (e)  Receipt of payments required pursuant to Section 8.5.2 of the
            Mainframe Agreement for termination for convenience by the Company,
            together with the receipt of any and all payments due under this
            letter agreement, shall be VITI's sole and exclusive remedy for such
            termination.

       (f)  The text "any loss that results from gross negligence or willful
            misconduct on the part of either party" shall be deemed deleted from
            Section 19.3 of the Distributed Agreement and Section 17.3 of the
            Mainframe Agreement.

       (g)  Section 18.1 of the Distributed Agreement and Section 16.1 of the
            Mainframe Agreement shall be deemed amended to include that Seller
            shall cause VITI not to enter into any settlement agreement with any
            third party that affects Company and is the subject of indemnity
            pursuant to either Section 18.1 of the Distributed Agreement or
            Section 16.1 of the Mainframe Agreement without the prior consent of
            Company, which consent shall not be unreasonably withheld.

       In the event of any conflict between this letter agreement and the Merger
Agreement or any of the Related Agreements, this letter agreement shall control.

       This letter agreement constitutes the entire agreement among the parties
pertaining to the subject matter hereof and supersedes all prior agreements and
understandings of the parties in connection therewith.

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                                    VERIZON INFORMATION SERVICES INC.

                                    By:  /s/ J. Goodwin Bennett
                                        Name: J. Goodwin Bennett
                                        Title: Authorized Representative

AGREED AND ACCEPTED:

TSI TELECOMMUNICATION SERVICES INC.

By:  /s/ Robert F. Garcia, Jr.
    Name:  Robert F. Garcia, Jr.
    Title: Associate General Counsel/
           Assistant Secretary

TSI TELECOMMUNICATION HOLDINGS, INC.

By:  /s/ Collin E. Roche
    Name:  Collin E. Roche
    Title: Vice President

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                                                                   EXHIBIT 10.29

                      VERIZON INFORMATION TECHNOLOGIES INC.
                                       AND
                      TSI TELECOMMUNICATION SERVICES, INC.

                     MAINFRAME COMPUTING SERVICES AGREEMENT

This Mainframe Computing Services Agreement ("Agreement") is made as of February
14, 2002 ("Effective Date"), between VERIZON INFORMATION TECHNOLOGIES INC.
("VITI"), with offices at One East Telecom Parkway, Post Office Box 290152,
Temple Terrace, Florida 33687, and TSI TELECOMMUNICATION SERVICES, INC." ("TSI"
or "Customer"), with offices at 201 North Franklin Street, Suite 700, Tampa,
Florida 33602.

In consideration of the terms and conditions and mutual obligations contained in
this Agreement, the parties agree as follows:

1.     CONSTRUCTION

1.1    References to an "Article," "Section," or "Subsection" shall be
       references to the articles, sections and subsections of the Agreement,
       unless otherwise specifically stated.

1.2    The Article and Section headings in the Agreement are intended to be for
       reference purposes only and shall in no way be construed to modify or
       restrict any of the terms or provisions of the Agreement.

1.3    The word "include," "includes," and "including" shall mean "include,
       without limitation," "includes, without limitation," and "including,
       without limitation," respectively.

2.     DEFINITIONS

2.1    "Affiliate" means, with respect to any entity, any other entity
       controlling, controlled by or under common control with such entity. For
       purposes of this definition, the term "control," including its
       derivatives, means the possession directly or indirectly of the power to
       direct or cause the direction of the management and policies of an
       entity, whether through the ownership of voting securities, by trust,
       management agreement, contract or otherwise.

2.2    "Agreement" means this Agreement and the Exhibits and Attachments
       attached to this Agreement, which Exhibits and Attachments are hereby
       incorporated by this reference into this Agreement.

2.3    "Expenses" has the meaning set forth in Section 9.3.

2.4    "Force Majeure" shall mean terrorism; acts of God and the public enemy;
       the elements; fire; accidents; vandalism; sabotage; external power
       failure; failure, delay or disruption of transportation facilities;
       strikes, lockouts or any other industrial, civil or public disturbances;

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       any laws, orders, rules, regulations, acts or restraints of any
       government or governmental body or authority, civil or military,
       including the orders and judgments of courts; and any other cause of any
       kind whatsoever not reasonably within the control of a party hereto.

2.5    "Fees" has the meaning set forth in Section 9.1.

2.6    "Hardware" means the central processing unit and peripheral equipment
       installed in a VITI facility, owned and utilized by VITI to provide the
       Services, including the telecommunications equipment at the demarcation
       point at VITI's facility. The term Hardware does not include terminals,
       controllers, or telecommunications equipment at the TSI site(s), or the
       actual circuits, required to enable TSI to utilize VITI's service bureau
       services, which terminals, controllers, telecommunications equipment and
       circuits are TSI's responsibility.

2.7    "Initial Term" has the meaning set forth in Section 8.1.

2.8    "Intellectual Property Rights" means any and all intangible rights
       existing from time to time under the law of any jurisdiction, including
       patent law, copyright law, trade secret law, unfair competition law,
       trademark law or other similar laws or principles.

2.9    "Services" has the meaning set forth in Section 3.1.

2.10   "Software" means any software used by VITI to provide Services.

2.11   "TSI Proprietary Data" means any and all technical and non-technical,
       non-public information owned by TSI that is used in or required for use
       in the business of TSI, including financial, marketing and business data,
       information and reports, pricing and cost information, correspondence and
       notes.

2.12   "TSI Software" means the TSI-developed application software.

2.13   "Verizon Enterprise License" means the agreements between Verizon and/or
       its affiliates and any third party to provide the VITI Third Party
       Software to Verizon and/or its affiliates.

2.14   "VITI Software" means that certain VITI-owned Software.

2.15   "VITI Third Party Software" means the third party-owned Software.

3.     SERVICES

3.1    COMPUTING AND HELP DESK SERVICES. VITI shall provide the mainframe
       computing and help desk services as described in Exhibit A (collectively,
       "Services"). TSI may order additional services by executing a supplement
       to this Agreement that identifies the additional services to be provided.
       There is no obligation to provide such additional services or to make
       payment therefor unless and until a supplement has been duly executed in
       accordance with this Agreement.

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3.2    SERVICE LEVELS. Service level measurements and objectives are as set
       forth in the Service Level Agreements (SLAs) between the parties attached
       hereto as Attachment 1 to Exhibit A.

4.     THIRD PARTY SOFTWARE

4.1    VITI SOFTWARE AND VITI THIRD PARTY SOFTWARE. VITI will use the Hardware
       to operate and run VITI Software and VITI Third Party Software; provided,
       however, that VITI shall obtain on TSI's behalf all consents necessary
       for use of the VITI Third Party Software and TSI will pay all costs
       related to obtaining required consents needed by VITI to use the VITI
       Third Party Software for TSI's benefit. VITI shall not make any VITI
       Third Party Software specifically licensed and paid for by TSI available
       to anyone other than TSI. In the event VITI cannot secure such consents
       to use the VITI Third Party Software on behalf of TSI, VITI shall
       identify such VITI Third Party Software and shall obtain on TSI's behalf
       a separate license , and corresponding maintenance. However, TSI shall be
       solely responsible for all license, maintenance and other fees due and
       payable for such VITI Third Party Software.

4.2    TSI SOFTWARE. VITI will use the Hardware to operate and run the TSI
       Software. TSI will pay all costs related to obtaining required consents
       needed by VITI to use the TSI Software for TSI's benefit as well as for
       all license, maintenance and other fees due and payable for such TSI
       Software.

5.     REQUIRED CONSENTS.

5.1    If a required consent is not obtained, then, unless and until such
       required consent is obtained, VITI shall work with TSI to determine and
       adopt such alternative approaches as are necessary and sufficient to
       provide the Services without such required consents.

6.     COMPUTING FACILITY AND RESOURCE UTILIZATION

6.1    USER LOGON IDENTIFICATION ASSIGNMENT. If necessary to provide the
       Services under this Agreement, VITI will assign Logon Identification
       names(s) ("IDs") in accordance with VITI's User Logon Identification
       Assignment procedures then in effect; provided, however, that VITI has
       provided TSI with a description of any change to such procedures. TSI
       shall be responsible for the security and control of such assigned IDs
       and shall restrict the use of such assigned IDs to access of TSI's
       programs and data. TSI shall be responsible for any and all usage charges
       incurred on the IDs assigned to it that TSI was aware of or about which
       TSI should have had reasonable knowledge. VITI agrees not to disclose
       TSI's IDs to any third party without the advance written consent of TSI.
       VITI shall have no liability for TSI's disclosure of IDs assigned by it
       to third parties.

6.2    TSI ACCESS TO VITI NETWORK OR FACILITY. Under no circumstances shall TSI
       personnel access any VITI network or facility for the purpose of
       accessing or attempting to access other internal or external networks,
       facilities, computer systems, partitions, programs, or data that is not
       specific to TSI. TSI further agrees that any capabilities for such access
       shall not be published or made known via any medium (e.g., posting on
       bulletin boards or via electronic mail). In addition, any such use or
       publication, or access to backdoors, data capture routines, games,

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       viruses, worms, Trojan horse routines, will be a breach of contract and
       VITI will provide notice thereof to TSI and VITI shall immediately cease
       providing the Services until such breach is cured. TSI shall ensure that
       all TSI personnel accessing VITI's systems are aware of their
       responsibilities and restrictions pertaining to the use of the IDs
       referenced in this Section 6.2.

6.3    FILE SECURITY. VITI will provide security and back-up and recovery
       services as specified in Article 12 to protect TSI's data. VITI reserves
       the right to issue and change security regulations and procedures as
       needed. VITI shall not be required to reconstruct any files, data, or
       programs that may, for any reason, have to be re-entered into the system,
       unless reconstruction is required due to a negligent act or omission on
       the part of VITI.

6.4    SERVICE USAGE CONDITIONS.

       6.4.1 TSI. TSI represents and agrees that it will use the Services in
       compliance with all applicable federal, state, and local laws and
       regulations, and communications common carrier tariffs. VITI reserves the
       right to take all actions, including termination of Services pursuant to
       this Agreement (in whole or in part), that it believes necessary to
       comply with applicable laws, regulations, and tariffs if TSI fails to
       discontinue any improper use of the Services promptly after receipt of
       written notice from VITI as is reasonably feasible under the
       circumstances.

       6.4.2 VITI. VITI represents and agrees that it will provide the Services
       in compliance with all applicable federal, state, and local laws and
       regulations, and communications common carrier tariffs. TSI reserves the
       right to take all actions, including termination of the Services (in
       whole or in part), that it believes necessary to comply with applicable
       laws, regulations, and tariffs if VITI fails to discontinue any improper
       action with respect to the Services promptly after receipt of written
       notice from TSI as is reasonably feasible under the circumstances.

7.     CONCEPT/PRODUCT OWNERSHIP

7.1    VITI. Except and to the extent otherwise provided in the Intellectual
       Property Agreement, TSI agrees that concepts, information, and materials
       developed by VITI prior to commencement of, and independent of work
       under, this Agreement, or owned by a third-party or supplier of VITI and
       furnished to TSI by VITI to enable VITI to perform the Services described
       herein, shall remain the property of VITI or such third-party or
       supplier.

7.2    TSI. Except and to the extent otherwise expressly provided in the
       Intellectual Property Agreement, VITI agrees that concepts, information,
       and materials developed by TSI prior to commencement of and independent
       of work under this Agreement, or owned by a third-party or supplier of
       TSI and furnished to VITI by TSI to enable VITI to perform the Services
       described herein, shall remain the property of TSI or such third-party or
       supplier.

7.3    Except for TSI Proprietary Data, all reports, recommendations, manuals,
       findings, evaluations, forms, models, tools, computer programs, source
       code listings, flow charts, programming documentation, reviews,
       information, data, and written materials developed by VITI in connection
       with the Services provided to TSI pursuant to this Agreement shall be the
       exclusive property of VITI however upon request, VITI shall provide TSI a
       printed copy of the reports,

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       recommendations, manuals, findings, evaluations, forms, flow charts,
       information, and data specifically related to TSI.

7.4    TSI PROPERTY RIGHTS. TSI retains exclusive ownership rights to all TSI
       Software, information and data files provided to VITI under this
       Agreement. All TSI Proprietary Data, including records, data files, input
       material reports, and other information received by VITI from TSI,
       computed, used or stored pursuant to this Agreement are the exclusive
       property of TSI. VITI shall not possess any interest, title, lien or
       right to any such TSI Proprietary Data. Nothing in this Agreement should
       be construed as granting VITI any license to the TSI Proprietary Data or
       conveying any interest or right in any TSI Proprietary Data or TSI
       Software, except to the extent necessary for VITI to perform its
       obligations and Services under this Agreement.

8.     TERM AND TERMINATION

8.1    INITIAL TERM. This Agreement shall commence on the Effective Date and
       shall have an initial term of six (6) months ("Initial Term") or until
       terminated as otherwise provided in this Agreement or by operation of
       law. In the event that TSI is unable to migrate to Lockheed Martin within
       the Initial Term, and upon thirty (30) days' written notice from TSI
       specifying a new end date, VITI will, extend the Services to TSI on a
       month to month basis under the same terms and conditions herein for a
       maximum of six (6) additional months. Any additional software license
       and/or maintenance charges applicable to such extension will be TSI's
       responsibility.

8.2    TERMINATION FOR DEFAULT. The occurrence of any of the following shall
       constitute a default, giving the non-defaulting party the right to
       terminate this Agreement for cause, subject to Sections 8.5.1 and 8.5.3
       below:

       8.2.1. NONPAYMENT. In the event TSI shall fail to pay when due any
       undisputed payment or other amount due hereunder and such failure shall
       continue for a period of thirty (30) days after such invoice is due,
       VITI, at its sole option, shall have the right to terminate this
       Agreement for default, provided that such termination may be made only
       following the expiration of a fifteen (15) day period during which TSI
       has failed to cure such breach after having been given written notice of
       such breach. In addition, VITI shall have the right, at its sole
       discretion, to stop providing Services to TSI under this Agreement, and
       VITI shall be relieved of any future obligations to perform Services
       under this Agreement. VITI shall retain all amounts previously paid by
       Customer, and TSI shall remain liable for all obligations upon
       termination as provided under Section 8.5 below;

       8.2.2  MATERIAL BREACH. Either party shall fail to perform or observe any
       other material covenant, condition or agreement to be performed or
       observed by it hereunder and such failure shall continue for a period of
       thirty (30) days after receipt of written notice; or

       8.2.3  BANKRUPTCY/INSOLVENCY. Either party shall commit an act of
       bankruptcy within the meaning of the Federal Bankruptcy Act, or
       bankruptcy, receivership, insolvency, reorganization, dissolution,
       liquidation or other proceedings shall be instituted by or against

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       either party or all or any substantial part of its property under any
       federal or state law and such proceeding shall not be dismissed within
       ninety (90) days.

8.3    TERMINATION FOR CONVENIENCE. In the event TSI wishes to terminate this
       Agreement prior to expiration of the Initial Term, TSI may do so with
       thirty (30) days' prior written notice to VITI, subject to Sections 8.5.2
       and 8.5.3 below.

8.4    FORCE MAJEURE. In the event VITI is unable to perform the Services in any
       material respect for more than ten (10) consecutive days, or for more
       than thirty (30) days in any calendar quarter, as a result of a Force
       Majeure, TSI may terminate this Agreement by giving VITI written notice
       of such termination.

8.5    OBLIGATIONS UPON TERMINATION.

              8.5.1  PAYMENT UPON TERMINATION FOR DEFAULT. In the event of a
              termination for default on the part of TSI (under Section 8.2
              above), TSI shall remain obligated to pay VITI Fees and Expenses
              incurred by VITI through the date of termination.

              8.5.2  PAYMENT UPON TERMINATION FOR CONVENIENCE. If TSI terminates
              this Agreement for convenience in accordance with Section 8.3,
              TSI will pay for Services rendered by VITI through the date of
              termination and for all amounts paid to third parties pursuant to
              Section 4.1 for VITI Third Party Software to the extent such
              amounts are previously unreimbursed,.

              8.5.3  RETURN OF MATERIALS. Upon termination of this Agreement,
              each party shall promptly return to the other party, or at the
              option of the owner, certify the destruction of, all data,
              programs and materials of the other held in connection with the
              performance of this Agreement. VITI will not be responsible for
              the retention of TSI Software, VITI Third Party Software or TSI
              Proprietary Data for a period in excess of sixty (60) days
              following the effective date of such termination. Within such
              period TSI must make arrangements with VITI for the transmission
              of such TSI Software and TSI Proprietary Data to TSI's designated
              data center. TSI will pay for all necessary media, processing,
              and shipping costs. TSI understands and agrees that at any time
              after delivery of the media, or after the sixty-first (61st) day
              following termination, VITI's file purge procedures will
              ultimately erase all storage media, including back-up storage
              media, which contain TSI Software or TSI Proprietary Data, and
              TSI expressly releases VITI from any and all liabilities in
              connection with the erasure or destruction of the same that TSI
              has stored on VITI's computers in excess of sixty (60) days
              following termination. TSI is solely responsible for maintaining
              a procedure for the reconstruction of lost data, programs and
              procedures for purposes of re-entry and back-up of TSI's data,
              except that VITI shall remain liable beyond the stated period for
              information remaining in storage at VITI for which TSI has
              specifically contracted with VITI to store beyond termination.

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              8.5.4  TERMINATION ASSISTANCE. Upon the written request of TSI or
              upon contract expiration or termination as specified in this
              Agreement, VITI shall perform transition services as reasonably
              requested by TSI which shall include:

                     (a) preparation and submission of a detailed turnover plan
                     which includes the overall strategy, schedule, itemization
                     of turnover deliverables, staffing plan, and tasks required
                     to complete the turnover; and

                     (b) transfer of Customer Data Files (archived and current),
                     files, and documentation to Customer.

              Termination assistance shall be set forth in a Service Request
              Form ("SRF") to be mutually agreed upon between the parties. TSI
              shall pay VITI for the transition services delineated in the SRF
              at the professional services hourly rate of $125 per hour. Except
              as expressly stated in this Agreement, TSI acknowledges that VITI
              will provide no transition assistance except as specifically
              requested in writing by TSI and agreed to in writing by VITI and
              TSI.

9.     FEES AND PAYMENTS

9.1    FEES. TSI shall pay VITI the fees for the Services as described in
       Exhibit B ("Fees").

9.2    TAXES. In addition to the Fees, TSI shall pay to VITI an amount equal to
       any excise, use, privilege, gross revenue, or sales tax, or any other tax
       (except income and franchise taxes), assessments, or duties, imposed by
       or under authority of any federal, state, provincial, or local law, and
       to be paid or assessed by VITI with respect to the Services or any
       portion or modification hereof or addendum. Taxes, assessments and duties
       will be separately identified on the invoices to which they apply.

9.3    EXPENSES. In addition to the Fees, TSI shall reimburse VITI for the
       reasonable, verifiable, travel out-of-pocket expenses, incurred by VITI
       that are attributable to VITI's employees providing Services at TSI's
       downtown Tampa location ("Expenses"). VITI shall not provide Services at
       any location other than the TSI downtown Tampa office. Expenses shall be
       identified separately in VITI invoices for Services.

9.4    INVOICES/PAYMENT. All fees and charges shall be invoiced monthly for
       Services rendered during the previous month and are due thirty (30)
       calendar days after the date of invoice. Late payment charges may be
       imposed by VITI at the rate of 1 1/2 % per month (18% per year) or the
       maximum rate allowed by law, whichever is lower. Interest shall not be
       payable by TSI for amounts on invoices that TSI has disputed in good
       faith provided that the dispute is resolved in TSI's favor and TSI pays
       within thirty (30) calendar days of the resolution of the dispute. With
       respect to disputed invoices, undisputed amounts must be paid within
       thirty (30) calendar days from the date of the invoice. VITI must be
       advised in writing of any amounts disputed by TSI and the basis of the
       dispute within fifteen (15) calendar days from the date of the invoice or
       the

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       entire invoice must be paid. Interest shall be payable from the original
       due date until the payment date for disputed invoices that are resolved
       in VITI favor.

10.    AUDIT RIGHTS

10.1   AUDIT. Upon at least two weeks' written notice to VITI and during VITI's
       normal business hours, TSI shall have the right to audit and verify
       VITI's operating environment and other areas of service to ensure that
       VITI is maintaining adequate controls and security measures, that VITI's
       usage data in support of the billings to TSI are correct, and that
       reports relating to VITI's performance are accurate. Such audit and
       inspection shall be limited to information that relates to the Services,
       and may include: (i) VITI's practices and procedures; (ii) VITI's
       computer systems; (iii) VITI's controls and security measures and
       procedures; (iv) VITI's disaster recovery and back-up procedures; (v) any
       matter necessary to enable TSI to meet applicable legal or regulatory
       requirements; (vi) VITI's compliance with service levels; and (vii) usage
       data in support of the billing data and records relating to the Services.
       TSI may conduct such audit and a verification review itself or with the
       assistance of a third party organization (provided that such organization
       has executed a Non-Disclosure Agreement with VITI), at TSI's expense.
       Such audit shall occur only once during the term of this Agreement,
       unless a regulatory agency requires additional audits, during the term of
       this Agreement. VITI will cooperate in this review and will furnish to
       TSI or TSI's designated representatives requested information on a timely
       basis provided that TSI reimburses VITI at the professional services rate
       of $125 per hour for all time expended by VITI.

              10.1.1 ACCESS. In accordance with Section 10.1, VITI shall
              provide to TSI and its Affiliates, their respective auditors
              (including internal audit staff), inspectors, regulators,
              consultants and other representatives as TSI may from time to
              time designate in writing, reasonable access to: (i) VITI's
              facilities where the Services are being performed; (ii) VITI's
              personnel providing any of the Services; and (iii) data and
              records in the possession of VITI relating to any of the Services
              as set forth above. All such persons shall adhere to VITI's
              customary security and safety policies.

              10.1.2 VITI COOPERATION. VITI shall assist TSI's auditors,
              inspectors, regulators and representatives as is reasonably
              required. VITI shall cooperate with TSI or its designees in
              connection with audit functions and with regard to examinations
              by regulatory authorities.

              10.1.3 EXPENSES. TSI shall bear its and VITI's expenses relating
              to any audit performed pursuant to this Article 10.

              10.1.4 ADJUSTMENTS. If any audit pursuant to this Article 10
              indicates the need for adjustments in TSI's payments for the
              Services, the audit results and recommendations will be used as
              the basis for the negotiation of equitable adjustments. Any
              adjustments will be paid by or credited to the appropriate party
              within sixty (60) days after the parties' agreement as to the
              adjustments.

                                        8
<Page>

10.2   TSI PROPRIETARY DATA AVAILABILITY. Notwithstanding any other provision of
       this Agreement, VITI will make all TSI Proprietary Data (complete and
       unaltered) available to TSI and its authorized agents. Furthermore,
       during the term of this Agreement, VITI will not destroy any TSI
       Proprietary Data (other than as otherwise permitted under this
       Agreement), without the prior express written consent of TSI. However,
       TSI understands and agrees that at any time after delivery of the storage
       media, or after the sixty-first (61st) day following termination, VITI's
       file purge procedures will ultimately erase all storage media, including
       back-up storage media, which contain TSI Software or TSI Proprietary
       Data.

10.3   SAFEGUARDING TSI PROPRIETARY DATA. VITI will establish and maintain
       safeguards against the destruction, loss, or alteration of TSI
       Proprietary Data in the possession of VITI that are no less rigorous than
       those maintained by VITI with respect to its own similar data. TSI will,
       at its own expense, have the right to establish backup security for TSI
       Proprietary Data and to keep backup data and data files at a non-Verizon
       location.

11.    GENERAL ADMINISTRATION

11.1   CHANGES. VITI may, upon reasonable notice to TSI, designate and make
       changes in rules of operation, teleprocessing protocols, accessibility
       periods, TSI identification procedures, type of terminal equipment, type
       and location of system and service equipment, system programming
       languages, and designation of the particular VITI data center serving TSI
       at any particular address, provided however that any such proposed change
       will not substantially impair TSI's ability to obtain Services or TSI's
       cost of receipt of the Services.

12.    BACKUP AND ARCHIVING; DISASTER RECOVERY

12.1   BACKUP AND ARCHIVING. As part of the Services, VITI shall perform: (i)
       periodic backup and archiving; (ii) purging and archiving of data; and
       (iii) general recovery.

12.2   DISASTER RECOVERY. VITI shall provide Disaster Recovery in accordance
       with the applicable provisions of Exhibit A.

13.    TELECOMMUNICATIONS

13.1   VITI shall be responsible for monitoring the TSI-provided
       telecommunications network between TSI's location and VITI's location, as
       well as for the purchase and maintenance of the network hardware/software
       at VITI's demarcation point. TSI shall be responsible for the purchase
       and maintenance of any network hardware/software necessary to allow TSI
       to connect to the network at the mutually agreed upon TSI demarcation
       point.

14.    CONFIDENTIAL AND PROPRIETARY INFORMATION:

14.1   DISCLOSURE. Both VITI and TSI acknowledge that certain information that
       each may receive from the other, non-public information concerning the
       business or finances of either party, and any other information the
       disclosure of which might harm or destroy a competitive advantage of the
       disclosing party, may be proprietary to the disclosing party. Neither
       receiving party shall,

                                        9
<Page>

       directly or indirectly, use or disclose any information concerning the
       disclosing party's business methods, customers or finances, or any other
       information that is disclosed to it by the other party, whether or not in
       writing and whether or not designated as proprietary, without the prior
       written permission of the disclosing party, unless such use or disclosure
       is specifically required in the course of the performance by the
       receiving party of its obligations hereunder. The parties acknowledge
       that this Agreement contains commercially confidential information that
       may be considered proprietary by either or both parties, and agree to
       limit distribution of this Agreement to those individuals in their
       respective corporations with a need to know the contents of this
       Agreement. The foregoing notwithstanding, nothing contained herein shall
       prevent either party from complying with applicable law, regulation or
       court order, provided that timely written notice is provided to the other
       party to permit the other party to seek to limit any required disclosure
       or to seek a protective order. The obligations of VITI and TSI under this
       Article 14 shall not extend to any information that: (i) becomes publicly
       available other than through the action of the receiving party; (ii) is
       subsequently rightfully furnished to the receiving party by a third party
       without restriction on disclosure; (iii) is furnished by the disclosing
       party to a third party without restriction on disclosure; or (iv) is
       rightfully known by the receiving party at the time of receiving such
       information; provided, however, that nothing herein shall preclude either
       party from disclosing information that is required to be disclosed by
       valid order of a court or other governmental body or otherwise required
       by law, to the extent that such disclosure is so required provided the
       receiving party gives prompt written notice to the disclosing party in
       order for the disclosing party to obtain a protective order or similar
       relief.

14.2   BREACH. VITI and TSI both acknowledge that any breach by them of their
       respective obligations under this Article 14 will cause irreparable harm
       to the other party for which its remedies at law will be inadequate and
       that in the event of any such breach the harmed party shall be entitled
       to equitable relief (including without limitation injunctive relief and
       specific performance) in addition to other remedies provided hereunder or
       available at law.

15.    REPRESENTATIONS AND WARRANTIES

15.1   VITI.

       15.1.1 AUTHORIZATION. VITI represents and warrants to TSI: (i) that this
       Agreement has been validly executed and delivered by VITI and that the
       provisions set forth in this Agreement constitute legal, valid, and
       binding obligations of VITI enforceable against VITI in accordance with
       their terms, subject to bankruptcy, insolvency, reorganization and other
       laws affecting creditor's rights generally, and with regard to equitable
       remedies, to the discretion of the court before which proceedings to
       obtain such remedies may be pending; (ii) that VITI has all requisite
       corporate power and authority to enter into this Agreement, and to carry
       out the transactions contemplated by this Agreement, and that the
       execution, delivery, and performance of this Agreement and the
       consummation of the transactions contemplated by this Agreement have been
       duly authorized by all requisite corporate action on the part of VITI;
       and (iii) that VITI's execution and delivery of this Agreement and VITI's
       performance or compliance with the terms of this Agreement will not
       conflict with, result in a breach of, constitute a default

                                       10
<Page>

       under, or require the consent of any third party under any license,
       sublicense, lease, contract, agreement or instrument to which VITI is
       bound or by which its properties are subject.

       15.1.2 NON-INFRINGEMENT. VITI represents and warrants to TSI that the
       Hardware, the VITI Software, the VITI materials provided under Section
       7.1, and the Services do not infringe, or constitute an infringement or
       misappropriation of, any Intellectual Property Rights of any third party.

       15.1.3 COMPLIANCE WITH LAWS. VITI represents and warrants to TSI that
       VITI will perform the Services in a manner that complies with all laws
       applicable to VITI. TSI will coordinate with and provide information to
       VITI as may be reasonably requested by VITI to enable VITI to comply with
       all applicable laws. If VITI is charged with a violation of or
       non-compliance with any such laws, VITI will promptly notify TSI of such
       charges in writing and will use VITI's reasonable commercial efforts to
       cure such violation or non-compliance as soon as practicable.

       15.1.4 PERFORMANCE OF SERVICES. VITI covenants and agrees, and represents
       and warrants to TSI, that VITI will provide the Services in a
       professional, workmanlike manner, and in accordance with the requirements
       of this Agreement.

       15.1.5 NO VIRUSES. VITI represents and warrants to TSI that VITI will use
       all commercially reasonable efforts to ensure that there are no viruses
       or similar items ("Viruses") in any VITI Software and VITI Third Party
       Software provided or used by VITI as part of the Services. VITI agrees
       that, in the event a Virus is found to have been introduced into such
       software from any source, VITI will use all commercially reasonable
       efforts to eliminate the Virus, to reduce the effects of the Virus and,
       if the Virus causes a loss of operational efficiency or loss of data, to
       mitigate and restore such losses.

       15.1.6 NO SUITS OR ACTIONS. VITI represents and warrants to TSI that
       there are no pending or threatened lawsuits, actions, or any other legal
       or administrative proceeding against VITI which, if adversely determined
       against VITI, will have a material adverse affect on VITI's ability to
       perform its obligations under this Agreement.

       15.1.7 CONTINUING WARRANTIES. VITI hereby agrees and covenants to ensure,
       throughout the term, that each of the representations and warranties set
       forth in this Section 15.1, and each other representation and warranty of
       VITI in this Agreement, remains true and correct during the term of this
       Agreement. To the extent that any such representation or warranty becomes
       untrue in any material respects during the term of this Agreement, VITI
       will notify TSI of the facts and circumstances surrounding such
       situation.

15.2   TSI:

       15.2.1 AUTHORIZATION. TSI represents and warrants to VITI: (i) that this
       Agreement has been validly executed and delivered by TSI and that the
       provisions set forth herein constitute legal, valid and binding
       obligations of TSI enforceable against TSI in accordance with their
       terms, subject to bankruptcy, insolvency, reorganization and other laws
       affecting creditors' rights generally, and with regard to equitable
       remedies, to the discretion of the court before which

                                       11
<Page>

       proceedings to obtain such remedies may be pending; (ii) that TSI has all
       requisite corporate power and authority to enter into this Agreement and
       to carry out the transactions contemplated by this Agreement, and that
       the execution, delivery and performance of this Agreement and the
       consummation of the transactions contemplated by this Agreement have been
       duly authorized by all requisite corporate action on the part of TSI; and
       (iii) that TSI's execution and delivery of this Agreement and TSI's
       performance or compliance with the terms of this Agreement will not
       conflict with, result in a breach of, constitute a default under, or
       require the consent of any third party under any license, sublicense,
       lease, contract, agreement or instrument to which TSI is bound or by
       which TSI's properties are subject.

       15.2.2 NON-INFRINGEMENT. TSI represents and warrants to VITI that: (1)
       the TSI Software does not infringe, or constitute an infringement or
       misappropriation of, any Intellectual Property Rights of any third party
       and (2) TSI is not providing any third party software to VITI.

       15.2.3 COMPLIANCE WITH LAWS. TSI represents and warrants to VITI that TSI
       will perform its obligations under this Agreement in a manner that
       complies with all applicable laws. If TSI is charged with a violation of
       or non-compliance with any such laws, TSI will promptly notify VITI of
       such charges in writing and will use TSI's reasonable commercial efforts
       to cure such violation or non-compliance as soon as practicable.

       15.2.4 NO VIRUSES. TSI represents and warrants to VITI that TSI will use
       all commercially reasonable efforts to ensure that there are no viruses
       or similar items ("Viruses") in any TSI Software provided to VITI. TSI
       agrees that, in the event a Virus is found to have been introduced into
       such software from any source, TSI will use all commercially reasonable
       efforts to eliminate the Virus, to reduce the effects of the Virus and
       VITI shall have the right to stop processing until this is accomplished
       or VITI can process without compromising the security of its data center.

       15.2.5 NO SUITS OR ACTIONS. TSI represents and warrants to VITI that
       there are no pending or threatened lawsuits, actions, or any other legal
       or administrative proceeding against TSI which, if adversely determined
       against TSI, will have a material adverse affect on TSI's ability to
       perform its obligations under this Agreement.

       15.2.6 CONTINUING WARRANTIES. TSI hereby agrees and covenants to ensure,
       throughout the term, that each of the representations and warranties set
       forth in this Section 15.2, and each other representation and warranty of
       TSI in this Agreement, remains true and correct during the term of this
       Agreement. To the extent that any such representation or warranty becomes
       untrue in any material respects during the term of this Agreement, TSI
       will notify VITI of the facts and circumstances surrounding such
       situation.

16.    INDEMNIFICATION

16.1   INDEMNIFICATION BY VITI. VITI will indemnify, defend and hold harmless,
       in accordance with the procedures described in Section 16.3, TSI and its
       Affiliates and its and their respective officers, directors, members,
       employees, agents, successors, and assigns, from and against any and all
       losses, claims, damages, liabilities, obligations, penalties, judgments,
       awards, costs,

                                       12
<Page>

       expenses, and disbursements finally awarded and caused by, relating to,
       based upon, arising out of or in connection with (a) any breach by VITI
       of the representations and warranties made by it under this Agreement;
       (b) gross negligence, recklessness or willful misconduct on the part of
       VITI or its officers, directors employees, agents, successors and
       assigns; (c) any claim that the Hardware, or use of the VITI Software, or
       the VITI materials provided under Section 7.1 infringes or
       misappropriates any Intellectual Property Rights of any third party; and
       (d) bodily injury or death or damage to tangible personal property to the
       extent the same was caused by the negligence or willful misconduct by
       VITI or its Affiliates or its and their respective directors, officers,
       employees, agents, successors or assigns.

16.2   INDEMNIFICATION BY TSI. TSI will indemnify, defend and hold harmless, in
       accordance with the procedures described in Section 16.3, VITI and its
       Affiliates and its and their respective officers, directors, members,
       employees, agents, successors, and assigns, from any and all losses,
       claims, damages, liabilities, obligations, penalties, judgments, awards,
       costs, expenses, and disbursements finally awarded and caused by,
       relating to, based upon, arising out of or in connection with (a) any
       breach by TSI of the representations and warranties made by it under this
       Agreement; (b) gross negligence, recklessness or willful misconduct on
       the part of TSI or its officers, directors employees, agents, successors
       and assigns; (c) any claim that the use of TSI Software infringes or
       misappropriates any Intellectual Property Rights of any third party; and
       (d) bodily injury or death or damage to tangible personal property to the
       extent the same was caused by the negligence or willful misconduct by TSI
       or its Affiliates or their respective directors, officers, employees,
       agents, successors or assigns.

16.3   INDEMNIFICATION PROCEDURE. The party obliged to indemnify ("Indemnifying
       Party") shall defend with counsel of its choosing any claim, demand, suit
       or other action (each, a "Claim") brought against each person seeking to
       be reimbursed, indemnified, defended, and/or held harmless (each an
       "Indemnified Party"). The Indemnified Party shall notify the Indemnifying
       Party promptly in writing of any Claims for which the Indemnified Party
       alleges that the Indemnifying Party is responsible under this Article 16,
       which notice shall include a reasonable identification of the alleged
       facts giving rise to such Claim. The Indemnifying Party shall be relieved
       of liability hereunder to the extent it is prejudiced by the Indemnified
       Party's failure to give prompt notice. The Indemnifying Party shall also
       be relieved of liability hereunder for settlement by the Indemnified
       Party of any Claim unless the Indemnifying Party has approved the
       settlement in advance (such approval not to be unreasonably withheld) or
       unless the defense of the Claim has been tendered to the Indemnifying
       Party in writing and the Indemnifying Party has failed promptly to
       undertake the defense. The Indemnified Party shall reasonably cooperate
       with the Indemnifying Party and its agents in defense of any Claim for
       which such Indemnified Party seeks to be reimbursed, indemnified,
       defended, or held harmless. Each Indemnified Party shall have the right
       to participate in the defense of any such Claim, by using attorneys of
       such Indemnified Party's choice, at such Indemnified Party's expense.

17.    LIMITATION OF LIABILITY

17.1   IN NO EVENT SHALL EITHER PARTY HAVE ANY LIABILITY TO THE OTHER WHATSOEVER
       FOR ANY INDIRECT, SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES,
       INCLUDING BUT NOT LIMITED TO LOSS OF

                                       13
<Page>

       ANTICIPATED PROFITS OR REVENUE OR OTHER ECONOMIC LOSS IN CONNECTION WITH
       OR ENSUING FROM THE SERVICES TO BE FURNISHED PURSUANT TO THIS AGREEMENT,
       EVEN IF THE OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
       DAMAGES.

17.2   CAP ON DAMAGES. In no event shall either party be entitled to any
       monetary damages against the other in excess of the average of six (6)
       months' charges for processing services based on the average of the
       previous three (3) months' invoices actually paid by TSI under this
       Agreement.

17.3   EXCLUSION. Sections 17.1 and 17.2 shall not apply to claims involving
       death, bodily injury, or property damage or the provisions of Article 7
       (Concept/Product Ownership), Article 14 (Confidential and Proprietary
       Information) or Sections 15.1.2 and 15.2.2 (Non-Infringement).

17.4   EXPIRATION OF CLAIMS. No action, regardless of form, arising out of the
       transactions contemplated by this Agreement may be brought by either
       party more than two (2) years after the cause of action has accrued,
       except that an action for non-payment may be brought within two (2) years
       after the date of last payment.

18.    ADDITIONAL SERVICES

18.1   CONVERSION, INTERFACING, RETROFITTING. Any conversion, interfacing, and
       retrofitting services requested by TSI are outside the scope of this
       Agreement. VITI, upon receipt of a statement of work from TSI, will
       prepare and submit its proposal to TSI. Upon acceptance by TSI, the new
       services will be set forth in a mutually agreed upon definitive Agreement
       between VITI and TSI.

18.2   SPECIAL SERVICES. TSI shall notify VITI in writing of its request for
       VITI to provide consulting services, develop customized software, or
       provide other professional services that may be offered by VITI from time
       to time. VITI will develop a proposal for TSI for the additional effort.
       TSI shall pay for any additional professional services, including any
       preliminary specifications or study requirements, on a time and materials
       basis at VITI's then-current hourly rate according to the professional
       services requested by TSI. Any professional services provided under this
       Section 18.2 will be set forth in a mutually agreed upon definitive
       Agreement between VITI and TSI.

19.    DISPUTE RESOLUTION:

19.1   ALTERNATIVE DISPUTE RESOLUTION. The parties desire to resolve disputes
       arising out of this Agreement without litigation. Accordingly, except for
       an action seeking a temporary restraining order or injunction related to
       the purposes of this Agreement, or suit to compel compliance with this
       dispute resolution process, the parties agree to use the following
       alternative dispute resolution procedure as their sole remedy with
       respect to any controversy or claim arising out of or relating to this
       Agreement or its breach.

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<Page>

19.2   PROCEDURE. At the written request of a party, each party will appoint a
       knowledgeable, responsible representative to meet and negotiate in good
       faith to resolve any dispute arising under this Agreement. The parties
       intend that these negotiations be conducted by non-lawyer, business
       representatives. The location, format, frequency, duration and conclusion
       of these discussions shall be left to the discretion of the
       representatives. Upon agreement, the representatives may utilize other
       alternative dispute resolution procedures such as mediation to assist in
       the negotiations. Discussions and correspondence among the
       representatives for purposes of these negotiations shall be treated as
       confidential information developed for purposes of settlement, exempt
       from discovery and production, which shall not be admissible in the
       arbitration described below or in any lawsuit without the concurrence of
       all parties. Documents identified in or provided with such
       communications, which are not prepared for purposes of the negotiations,
       are not so exempted and may, if otherwise admissible, be admitted in
       evidence in the arbitration or lawsuit.

19.3   BINDING ARBITRATION/DISCOVERY. If the negotiations do not resolve the
       dispute within sixty (60) days of the initial written request, the
       dispute shall be submitted to binding arbitration by a single arbitrator
       pursuant to the Commercial Arbitration Rules of the American Arbitration
       Association. A party may demand such arbitration in accordance with the
       procedures set out in those rules. Discovery shall be controlled by the
       arbitrator and shall be permitted to the extent set out in this Section
       19.3. Each party may submit in writing to a party, and that party shall
       so respond, to a maximum of any combination of thirty-five (35) (none of
       which may have subparts) of the following:

                     (1)    interrogatories,
                     (2)    demands to produce documents, and
                     (3)    requests for admission

19.4   DEPOSITIONS/ARBITRATION HEARING. Each party is also entitled to take the
       oral deposition of one individual of another party. Additional discovery
       may be permitted upon mutual agreement of the parties. The arbitration
       hearing shall be commenced within sixty (60) days of the demand for
       arbitration. The arbitration shall be held in Tampa, Florida. The
       arbitrator shall control the scheduling so as to process the matter
       expeditiously. The parties may submit written briefs. The arbitrator
       shall rule on the dispute by issuing a written opinion within thirty (30)
       days after the close of hearings. The times specified in this Section
       19.4 may be extended upon mutual agreement of the parties or by the
       arbitrator upon a showing of good cause. Judgment upon the award rendered
       by the arbitrator may be entered in any court having jurisdiction. The
       arbitrator shall have no authority to award punitive or exemplary damages
       or any other damages not measured by the prevailing party's actual
       damages and may not, in any event, make any ruling, finding or award that
       does not conform to the terms and conditions of this Agreement.

19.5   COSTS. Each party shall bear its own costs of these procedures. A party
       seeking discovery shall reimburse the responding party the costs of
       production of documents (to include search time and reproduction costs).
       The parties shall equally split the fees of the arbitration cost, the
       court reporter's transcript, and the arbitrator.

                                       15
<Page>

20.    NOTICES

20.1   NOTICES. All notices required to be given hereunder shall be given to the
       respective parties by facsimile transmission or by such other method as
       will result in a written acknowledgment of receipt. Notices shall be
       deemed delivered on the Business Day (Monday through Friday, excluding
       TSI and VITI holidays) following the date shown on the facsimile
       transmission or on the date shown on the signed receipt.

       To VITI:         Verizon Information Technologies Inc.
                        One East Telecom Parkway
                        P.O. Box 290152
                        Temple Terrace, Florida 33687
                        Attention: Vice President-Commercial Services
                        Facsimile: (813) 978-6020

       Copies to:       Legal Department
                        Verizon Information Technologies Inc.
                        One East Telecom Parkway, DC A1H
                        Post Office Box 290152
                        Tampa, FL 33687
                        Facsimile: (813) 978-4163

       To TSI:          TSI Telecommunication Services Inc.
                        201 North Franklin Street
                        Suite 700
                        Tampa, Florida 33602
                        Facsimile: 813-273-3484

20.2   Either party may change its contact person, address and facsimile number
       for notice purposes by giving the other party written notice of the new
       address and the date upon which it will become effective in accordance
       with this Article 20.

21.    MISCELLANEOUS

21.1   EQUAL EMPLOYMENT OPPORTUNITY The Equal Employment Opportunity Clause in
       Section 202, Paragraphs 1 through 7, of Executive Order 11246, as
       amended, relative to Equal Employment Opportunity, and the implementing
       Rules and Regulations of the Office of Federal Contract Compliance, are
       incorporated herein by specific reference.

21.2   ASSIGNMENT; SUCCESSORS. Neither party may assign the rights or
       obligations of this Agreement without the express written consent of the
       other, which consent shall not be unreasonably delayed or withheld;
       provided, however, that either party may, upon written notice to the
       other party, assign its rights and obligations under this Agreement: (a)
       to an Affiliate; (b) to an entity that acquires all or substantially all
       of the assets of the assigning party; or (c) to any successor

                                       16
<Page>

       in a merger or acquisition of the assigning party. In case of assignment,
       the provisions of this Agreement shall be binding on all successors and
       assigns.

21.3   SEVERABILITY. In the event that any portion of this Agreement is
       terminated or deemed to be void or unenforceable, that portion of the
       Agreement shall be severed and the balance of the provisions shall
       continue and be effective and enforceable.

21.4   WAIVER. No delay or omission by either party to exercise any right or
       power hereunder shall preclude the exercise of such right or power in
       subsequent instances or be construed to be a waiver. A waiver by either
       party of any of the covenants to be performed by the other party shall
       not be construed to be a waiver of any covenant herein contained, and the
       waiver of any breach of covenant shall not be construed to be a waiver of
       any succeeding breach. All remedies provided for in this Agreement shall
       be cumulative and in addition to and not in lieu of any other remedies
       available to either party at law, in equity, or otherwise.

21.5   FORCE MAJEURE. Neither party shall be liable by reason of any failure in
       performance of this Agreement for reason of Force Majeure.

21.6   GOVERNING LAW. This Agreement shall be governed by, interpreted and
       construed in accordance with the laws of the State of Florida, without
       giving any effect to any provision of such law relating to conflict of
       laws.

21.7   PUBLICITY. Except for intra-company bulletins and communications, neither
       VITI nor TSI shall make or authorize any media release, advertisement, or
       other disclosure pertaining to this Agreement without the prior written
       consent of the other party. Notwithstanding the foregoing, VITI may list
       TSI as a customer through media releases, and/or other promotional and
       marketing media and describe in general terms the Services

21.8   INDEPENDENT CONTRACTOR. It is expressly understood that VITI and TSI are
       independent contractors of one another, and that neither has the
       authority to bind the other to any third person or otherwise to act in
       any way as the representative of the other, unless otherwise expressly
       agreed to in writing by both parties.

21.9   ACTION REQUIRING CONSENT. Wherever agreement, approval, acceptance,
       consent or similar action by either party is required by any provision of
       this Agreement, such action shall be not unreasonably delayed or
       withheld.

21.10  ACCOUNT SUPPORT - ORGANIZATION AND ADMINISTRATION. Routine account
       activities will be managed and administered jointly by designated
       participants of TSI and VITI.

21.11  ORDER OF PRECEDENCE. To the extent any of the terms and conditions set
       forth in the Exhibits or Attachments hereto conflict with any of the
       terms and conditions of this Agreement, the terms and conditions of the
       Exhibits and Attachments shall control.

                                       17
<Page>

21.12  ENTIRE AGREEMENT; SURVIVAL. This Agreement and its Exhibits and
       Attachments constitute the entire agreement between the parties with
       respect to the subject matter hereof and there are no written or oral
       representations, understandings or agreements which are not fully
       expressed herein. This Agreement and executed Exhibits and Attachments
       are intended to be the exclusive statement of the agreement between the
       parties with respect to the subject matter hereof and any other terms or
       conditions included in quotes, acknowledgments, bills of lading, or other
       forms utilized or exchanged by the parties shall not be incorporated
       herein or be binding unless expressly agreed to in writing by both
       parties. No change, waiver, or discharge hereof shall be valid unless in
       writing and signed by authorized representatives of both parties. The
       respective obligations of the parties under this Agreement that by their
       nature would continue beyond the termination, cancellation or expiration,
       shall survive termination, cancellation, or expiration.

21.13  COVENANT OF GOOD FAITH. Each party, in its respective dealings with the
       other party under or in connection with the Agreement, shall act in good
       faith.

21.14  The parties have caused this Agreement to be signed by their duly
       authorized representatives on the date first set forth above.

TSI TELECOMMUNICATION SERVICES, INC.

/s/ Robert Garcia, Jr.
By - Signature

Robert Garcia, Jr.
Printed Name

Associate General Counsel/Assistant Secretary
Title

VERIZON INFORMATION TECHNOLOGIES INC.

/s/ Del Jenkons
By - Signature

Del Jenkins
Printed Name

Vice President, IT Services
Title

                                       18
<Page>

                                    EXHIBIT A

                                STATEMENT OF WORK

                    TO MAINFRAME COMPUTING SERVICES AGREEMENT

                                     BETWEEN

                     VERIZON INFORMATION TECHNOLOGIES, INC.
                                       AND

                      TSI TELECOMMUNICATION SERVICES, INC.

                             DATED FEBRUARY 14, 2002

This Statement of Work ("SOW") outlines the tasks required for VERIZON
INFORMATION TECHNOLOGIES INC. ("VITI") to support TSI TELECOMMUNICATION
SERVICES, INC. ("TSI") mainframe processing at VITI's data center facility. VITI
shall perform its Services in accordance with the Mainframe Computing Services
Agreement between VITI and TSI, dated February 14, 2002 ("Agreement") and upon
execution by both parties hereto, this SOW shall become a part of the Agreement.

1.0    ACRONYMS/DEFINITIONS - The terminology as used in this SOW shall have the
       following meanings. Any other defined terms used in this SOW shall have
       the meaning set forth in the Agreement.

       SERVICES refers to mainframe data processing and on-going computer
       operations, including:

              -   Console Operations

              -   Tape Management

              -   Production Control and Scheduling

              -   Systems Software Support

              -   Technical Support

              -   Migration Services

              -   Change Management

              -   Network Support Services

              -   Data and Physical Security

              -   Help Desk

       24x7 means 24 hours per day, 7 days per week, 365 days per year

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       SERVICE REQUEST refers to a formal documented notification of additional
       or modified services under this SOW.

       DISASTER refers to natural or man-made circumstances that has or is
       likely to cause an interruption in the availability of services for more
       than three (3) days.

       HARDWARE refers to the computer equipment and peripheral equipment
       installed at VITI and utilized by VITI to provide the Services described
       in this SOW. The term Hardware does not include terminals, networks,
       controllers, or telecommunications equipment at TSI's site required to
       enable TSI to utilize the Services, all of which are TSI's
       responsibility.

       NSC refers to the Verizon National Support Center that provides help desk
       support.

       OPERATIONAL SUPPORT refers to the activities performed by the operations
       staff responsible for day-to-day operations.

       PRODUCTION ENVIRONMENT refers to the system(s) residing in the VITI
       facility that is used for execution of business applications and storing
       of business data.

       SOFTWARE refers to the operating system, databases, and third party
       products.

       SOFTWARE CURRENCY refers to maintaining software versions within one (1)
       release of the most current available version.

       SYSTEM refers to the individual system that consists of the Hardware and
       Software.

       TECHNICAL SUPPORT refers to the support of the Hardware, Software,
       network and applications of the contracted equipment.

2.0    DESCRIPTION OF SERVICES

       2.1    SERVICES

              VITI shall provide the Services as defined in this SOW for all of
              TSI's mainframe data processing, system software support,
              second-level network support and help desk support requirements.

       2.1.1  PROCESSOR

              VITI shall process TSI's information on an OS/390 processor(s) at
              its data center. VITI shall ensure that the processor(s) is
              available to meet critical processing times both for production
              and development/test work.

       2.1.2  DASD

              The disk storage environment will consist of EMC 5830 technology
              or equivalent. The configuration will provide the capability of
              expanding to meet future requirements.

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       2.1.3  CONSOLE OPERATIONS

              VITI shall provide 24x7 master console operations to support all
              production processing within TSI's application portfolio. VITI's
              system performance technicians will monitor the CPU and all
              associated tasks and applications. If a system hardware or
              software problem occurs which interrupts critical jobs,
              corrective action shall be initiated to get the job flow back on
              schedule.

       2.1.4  TAPE MANAGEMENT

              TSI's entire tape library will be managed, 24x7, by VITI's tape
              operations organization. The tape management organization has
              established procedures for these services to include:

              -   Tape mounts

              -   Scratch tape processing

              -   Tape labeling

              -   Tape shipment (VITI will pass through to TSI the costs
                  associated with shipping tapes to TSI's vendors and
                  customers)

              -   Provision of Tape Media

              -   Management and Maintenance of Tape Services

              -   Required Tape Archiving

       2.1.5  PRODUCTION CONTROL AND SCHEDULING

              VITI shall be responsible for all production control and
              scheduling functions, including application abend (abnormal end)
              management. VITI shall ensure that the system is properly
              maintained so that online transactions and batch jobs can process
              24x7, except for scheduled maintenance windows. VITI's scheduling
              and production control services include:

              -   Developing and maintaining schedules for production workload
                  requirements

              -   Monitoring production job processing

              -   Provisioning first-level problem determination when an
                  application system fails or escalating to the appropriate
                  second-level support contact

              -   Coordinating and managing application restarts using JCL
                  changes or program restarts

              -   Scheduling and managing application and system backups

       2.2    SYSTEM SOFTWARE SUPPORT

       VITI shall provide system software support as follows:

              -   Maintenance of system software currency

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              -   Analysis and resolution of systems problems

              -   Vendor interface for systems software

              -   On-call technical support 24x7

              -   Technical consulting for mainframe related questions

       TSI shall provide software support for all its application software
       products as follows:

              -   Application support

              -   Analysis and resolution of application software problems

              -   Vendor interface, if any

              -   On-call technical support 24 hours a day, 7 days a week

              -   Analysis and resolution of problems

              -   Maintenance/Service Contracts for TSI owned software products

       2.3    TECHNICAL SUPPORT

       VITI's technical support staff shall provide system support of functions
       in support TSI's production processing. These functions include:

              -   Maintaining system software inventory

              -   Preparing, installing, and certifying operating system
                  software releases

              -   Providing vendor interface

              -   Performing problem analysis and resolution

              -   Ordering and budgeting software

              -   Providing capacity planning and performance tuning

              -   Monitoring/optimizing/recovering DASD, Tape, and CPU

              -   Assisting and participating in disaster recovery planning

              -   Responding to help desk-reported problems, 24x7

3.0    FACILITIES

       Services shall be provided by VITI from its Temple Terrace, FL data
       center. VITI's data center provides a secure operating environment with
       enhanced physical protection of hardware resources. Specific physical
       features include state-of-the-art systems for security, fire protection,
       and power management as well as consistent temperature and humidity
       control.

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4.0    CHANGE MANAGEMENT

       VITI shall be responsible for controlling all changes to the system,
       including Hardware and Software. Change management personnel will ensure
       that the risks associated with changes to the processing environment are
       minimized. They shall identify and adhere to strict change management and
       control procedures. The change management process involves the following
       steps:

              -   Completing documentation (reason for change, duration of
                  change, etc.)

              -   Gaining approval of both parties

              -   Creating a back-out plan if the change cannot be implemented

       The goal of the change management personnel is to communicate,
       coordinate, schedule, monitor, and implement changes in a consistently
       smooth manner.

5.0    NETWORK SUPPORT SERVICES

       VITI shall be responsible for 24x7 support for the Catalyst 5500 switches
       and the existing two firewalls.

6.0    SECURITY

       6.1    DATA SECURITY ADMINISTRATON

       VITI shall provide system support for the security product.

       TSI shall retain the authority to approve/remove access to all data and
       systems. VITI shall be responsible for implementing all access requests.

       6.2    PHYSICAL SECURITY

       VITI shall employ a multi-level approach to security that includes:

              -   24-hour monitoring through the use of guard services,
                  electronic locks with card reader access, closed circuit
                  television and keys.

              -   Color-coded identification cards issued to all authorized
                  personnel to identify employees, contractors, vendors,
                  customer, and guests within the facility and to control
                  access to restricted areas.

              -   Reporting procedures for reporting the loss, theft, vandalism
                  or misuse of company assets or assets in the custody of VITI.

7.0    NATIONAL SUPPORT CENTER HELP DESK SERVICES/PROBLEM MANAGEMENT

       NSC shall use established industry standard procedures for the management
       and resolution of all problems in TSI's data processing environment. The
       NSC employs proven problem management procedures and tools to continually
       improve data processing efficiencies and services. Our help desk will
       provide TSI:

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              -   24x7 availability

              -   Standardized problem reporting, logging, and tracking
                  procedure

              -   End-to-End problem ownership

              -   Problem resolution or immediate dispatch of critical problems

              -   Automated paging and escalation system

       When contacted by TSI's help desk or support group, our help desk
       consultant will open a problem record (with a comprehensive description
       of the problem) while the contact from TSI is on the telephone. In the
       event the NSC consultant cannot resolve the problem, the consultant will
       dispatch the record to the appropriate support group. After problem
       investigation and resolution, the problem record is updated as required
       and closed. VITI will not consider a problem record closed until TSI
       verifies resolution.

8.0    MODIFICATION PROCEDURES (CHANGE CONTROL PROCESSES)

       8.1    Changes to this SOW ("Modifications") may be requested at any
              time by either TSI or VITI. All such requested changes will be in
              writing through a Service Request form ("Service Request").
              Designated representatives of TSI and VITI shall determine
              whether the Modification will materially affect the price,
              schedule or terms of the agreement and will jointly review the
              Service Request. VITI's Account Manager is responsible for
              coordination of the change control process on behalf of VITI.
              Based upon the joint review of the Service Request, the following
              procedures will apply:

                  -   If, as a result of the joint review, it is determined
                      that the Modifications do not materially affect the
                      price, schedule or terms of the Agreement, then the
                      designated representative for the party receiving the
                      Service Request will initiate a written acceptance or
                      rejection of the request within three (3) days for
                      emergency requests and ten (10) days for routine
                      requests.

                  -   If, as a result of the joint review, it is determined
                      that the Modifications do materially affect the price,
                      schedule or terms of the Agreement, then VITI shall
                      submit to TSI an amending Work Order which shall include
                      a description of the Modifications and the time and
                      charges required to provide the requested Modifications.
                      Neither party shall be under any obligation to proceed
                      with any requested modifications prior to receipt of a
                      fully executed amending Work Order.

              Upon receipt of an amending Work Order, TSI shall have a period
              of fifteen (15) days in which to (i) provide VITI with written
              authorization to implement the requested change, or (ii) provide
              VITI with written notice to disregard such Service Request. If
              TSI provides VITI with a notice to disregard the Service Request
              after VITI has prepared an amending Work Order, then VITI
              reserves the right to charge TSI for its services associated with
              the effort, including any preliminary specifications or study
              requirements.

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<Page>

       8.2    The issuance of information, advice, approvals or instructions by
              either VITI's or TSI's technical personnel or other
              representatives shall be deemed expressions of personal opinion
              only and shall not affect VITI's and TSI's rights and obligations
              hereunder unless the same is in writing, signed by authorized
              representatives of both parties, and expressly states that it
              constitutes a change.

9.0.   VITI/TSI LIAISON

           ACCOUNT MANAGER
              Name:             Laura Slone
              Telephone:        813-978-5389
              Address:          1 East Telecom Parkway
                                Temple Terrace, Florida 33637

           CUSTOMER ADVOCATE
              Name:             Mike Henke
              Telephone:        813-978-7814
              Address:          1 East Telecom Parkway
                                Temple Terrace, Florida 33637

       Following are the accountabilities and responsibilities of the ACCOUNT
       MANAGER:

              -   Overall relationship management between TSI and VITI

              -   Understand the general business strategy and direction of TSI
                  to ensure VITI continually provides required performance and
                  service levels for TSI

              -   Communicate with the Customer Advocate to assure compliance
                  with all contractual obligations

              -   Conduct quarterly account review meetings at a mutually
                  agreed to location

       Following are the accountabilities and responsibilities of the CUSTOMER
       ADVOCATE:

              -   Direct responsibility to interface with VITI's internal
                  organizations, including all of VITI's operations services
                  national organizations, and ensure that all service levels
                  are being met

              -   Coordinate weekly status meetings

              -   Serve as first level of escalation for all related issues or
                  concerns

              -   Serve as primary contact for other VITI groups in support of
                  TSI

              -   Review with VITI management progress on the attainment of
                  service level objectives:

                      - Create Report Card for TSI monthly

                      - Document Outage Information

                      - Document SLA percentages monthly

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<Page>

10.0   DISASTER RECOVERY

       VITI will continue to perform disaster recovery for TSI's production
       environment under VITI's current disaster recovery plan.

11.0   SERVICE LEVELS

       VITI will perform its Services under this SOW in accordance with the
       service levels currently in place with TSI as set forth in Attachment 1
       hereto.

IN WITNESS WHEREOF, TSI and VITI have each caused this Statement of Work to be
signed and delivered by their duly authorized representatives, all as of the
date set forth on page 1 hereof.

TSI TELECOMMUNICATION SERVICES                  VERIZON INFORMATION TECHNOLOGIES
INC.                                            INC.

/s/ Robert F. Garcia, Jr.                       /s/ Del Jenkins
By                                              By

Robert F. Garcia, Jr.                           Del Jenkins
Name                                            Name

Associate General Counsel/                      Vice President, IT Services
 Assistant Secretary
Title                                           Title

                                       26
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                                    EXHIBIT B

                                     PRICING

<Table>
<Caption>
---------------------------------------------------------
    SERVICE                         CHARGE
---------------------------------------------------------
 <S>                        <C>
 CPU - Prime                $25.369 per SCPH

 CPU - Non-Prime            $10.7201 per SCPH

 CPU - No Priority          $ 6.2872 per SCPH

 Disk EXCP                  $ 0.0213 per 1000 EXCP

 Disk Storage               $ 0.0043 per 1000 KB per day

 Bytes Transfer             $ 0.0088 per 1000 KB

 Page Prints                $ 0.0294 per Page

 Tape Mounts                $ 0.6746 per Mount

 Tape Storage               $ 0.50000 per Tape
---------------------------------------------------------
</Table>

                                       28

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