Document:

<PAGE>   1
                                                                    EXHIBIT 10.1

                         COMMON STOCK PURCHASE AGREEMENT

                                     BETWEEN

                        THE ASHTON TECHNOLOGY GROUP, INC.
                                  (THE COMPANY)

                                       AND

                           CALP II LIMITED PARTNERSHIP
                                 (THE PURCHASER)

                          DATED AS OF FEBRUARY 5, 2001

<PAGE>   2

                         COMMON STOCK PURCHASE AGREEMENT

         This Common Stock Purchase Agreement (this "Agreement") is made and
entered into as of February 5, 2001 (the "Effective Date"), between The Ashton
Technology Group, Inc. (the "Company"), a Delaware corporation, and CALP II
Limited Partnership (the "Purchaser"), a Bermuda limited partnership.

                                   BACKGROUND

         The Company has authorized the issuance, sale, and delivery of
1,333,333 shares (the "Shares") of the Company's Common Stock, par value $0.01
("Common Stock") at a price per Share of $1.50, in currency of the United States
of America, for a total purchase price of U.S. $2,000,000. The Purchaser wishes
to purchase the Shares upon the terms and conditions stated in this Agreement.
The Purchaser is purchasing the Shares in reliance upon an exemption from the
registration requirements of Section 5 of the U.S. Securities Act of 1933, as
amended (the "Securities Act"), in reliance upon the safe harbor afforded by
Rule 903 promulgated by the U.S. Securities and Exchange Commission (the "SEC").

                                    AGREEMENT

         For and in consideration of the premises and the mutual covenants
contained herein and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the Company and the Purchaser
hereby agree as follows:

         SECTION 1. ISSUANCE AND SALE OF COMMON STOCK

         1.1. The Company agrees to issue and sell the Shares to the Purchaser
and the Purchaser agrees to purchase the Shares from the Company, at the
Closing, for the Purchase Price of U.S.$2,000,000.

         1.2. At the Closing, the Company agrees to issue and deliver to the
Purchaser a certificate for the Shares, registered in the Purchaser's name, free
and clear of any claims, and containing a legend complying with the requirements
of SEC Rule 903(b)(3)(iii)(B)(3) and the Purchaser agrees to deliver the
Purchase Price to the Company.

                                     RIDER A

         1.3. The closing of the transactions contemplated by this Agreement
(the "Closing") shall take place at a mutually agreed upon time, date and place.

         SECTION 2. PURCHASER'S REPRESENTATIONS AND WARRANTIES.

         2.1. The Purchaser represents and warrants to the Company that:

                  (a) The Purchaser is not a U.S. person (a "U.S. Person") as
         defined in SEC Rule 902(k).

                                       2
<PAGE>   3

                  (b) The offer to sell the Shares to the Purchaser was made
         outside the United States.

                  (c) The Purchaser's buy order for the Shares was made outside
         the United States.

                  (d) The Purchaser has complied with all of the conditions
         required of it by SEC Regulation S in connection with its purchase of
         the Shares.

                  (e) The Purchaser is acquiring the Shares for investment, and
         not with a view towards or for resale in connection with the public
         sale or distribution thereof in the United States, or to or for the
         account of a U.S. person; provided, however, that by making this
         representation, the Purchaser does not agree to hold any Shares for any
         minimum or other specific term.

                  (f) The Purchaser is an "accredited investor" as that term is
         defined in Rule 501(a)(3) of Regulation D promulgated under the
         Securities Act.

                                     RIDER B

                  (g) The Purchaser understands that the Shares are being
         offered and sold to it in reliance upon specific exemptions from the
         registration requirements of United States federal and state securities
         laws and that the Company is relying upon the truth and accuracy of,
         and the Purchaser's compliance with, the representations, warranties,
         agreements, acknowledgements, and understandings of the Purchaser set
         forth herein in order to determine the availability of such exemptions
         and the eligibility of the Purchaser to acquire the Shares.

                  (h) The Purchaser and its advisors, if any, have been
         furnished with all materials relating to the proposed business,
         financial condition, and operations of the Company and materials
         relating to the offer and sale of the Shares, which have been requested
         by the Purchaser. The Purchaser and its advisors, if any, have been
         afforded the opportunity to ask questions of the Company; provided,
         however, neither such inquiries nor any other due diligence
         investigations conducted by the Purchaser or its advisors, if any, or
         its representatives shall modify, amend, or affect the Purchaser's
         right to rely on the Company's representations and warranties contained
         in Section 3 below. The Purchaser understands that its investment in
         the Shares involves a high degree of risk. The Purchaser has sought
         such accounting, legal, and tax advice as it has considered necessary
         to make an informed investment decision with respect to its acquisition
         of the Shares.

                  (i) The Purchaser understands that no United States federal or
         state agency or any other government or governmental agency has passed
         on or made any recommendation or endorsement of the Shares, or the
         fairness or suitability of the investment in the Shares, nor have such
         authorities passed upon or endorsed the merits of the offering of the
         Shares.

                                       3
<PAGE>   4

                                     RIDER C

                  (j) The Purchaser understands that (i) the sale or re-sale of
         the Shares has not been registered under United States federal or state
         securities laws, and the Shares may not be transferred unless (a) the
         Shares are sold pursuant to an effective registration statement under
         the Securities Act, (b) the Purchaser shall have delivered to the
         Company an opinion of counsel (which opinion shall be in form,
         substance and scope customary for opinions of counsel in comparable
         transactions) to the effect that the Shares to be sold or transferred
         may be sold or transferred pursuant to an exemption from such
         registration, (c) the Shares are sold or transferred to an "affiliate"
         (as defined in Rule 144 promulgated under the Securities Act (or a
         successor rule) ("Rule 144")) of the Purchaser who agrees to sell or
         otherwise transfer the Shares only in accordance with this Section 2(j)
         and who is an "accredited investor" as that term is defined in Rule
         501(a) of Regulation D promulgated under the Securities Act, or (d) the
         Shares are sold pursuant to Rule 144; (ii) any sale of such Shares made
         in reliance on Rule 144 may be made only in accordance with the terms
         of Rule 144 and further, if Rule 144 is not applicable, any re-sale of
         such Shares under circumstances in which the seller (or the person
         through whom the sale is made) may be deemed to be an underwriter (as
         that term is defined in the Securities Act) may require compliance with
         some other exemption under the Securities Act or the rules and
         regulations of the SEC thereunder; and (iii) neither the Company nor
         any other person is under any obligation to register such Shares under
         the Securities Act or any state securities laws or to comply with the
         terms and conditions of any exemption thereunder (in each case, other
         than pursuant to Section 4.1 hereof). Notwithstanding the foregoing or
         anything else contained herein to the contrary, the Shares may be
         pledged as collateral in connection with a bona fide margin account or
         other lending arrangement.

                  (k) The Purchaser understands that the Shares may bear a
         restrictive legend in substantially the following form (and a
         stop-transfer order may be placed against transfer of the certificates
         for such Shares:

                  "The securities represented by this certificate have not been
                  registered under the Securities Act of 1933, as amended. The
                  securities may not be sold, transferred or assigned in the
                  absence of an effective registration statement for the
                  securities under said Act, or an opinion of counsel, in form,
                  substance and scope customary for opinions of counsel in
                  comparable transactions, that registration is not required
                  under said Act or unless sold pursuant to Rule 144 under said
                  Act."

                  The legend set forth above shall be removed and the Company
shall issue a certificate without such legend to the holder of any Share upon

                                       4
<PAGE>   5

which it is stamped, if, unless otherwise required by applicable state
securities laws, (a) such Share is registered for sale under an effective
registration statement filed under the Securities Act or otherwise may be sold
pursuant to Rule 144 without any restriction as to the number of securities as
of a particular date that can then be immediately sold, or (b) such holder
provides the Company with an opinion of counsel, in form, substance and scope
customary for opinions of counsel in comparable transactions, to the effect that
a public sale or transfer of such Share may be made without registration under
the Securities Act and such sale or transfer is effected, or (c) such holder
provides the Company with reasonable assurances that such Share can be sold
pursuant to Rule 144. The Purchaser agrees to sell all Shares including those
represented by a certificate(s) from which the legend has been removed, in
compliance with applicable prospectus delivery requirements, if any.

                  (l) This Agreement has been duly and validly authorized,
         executed, and delivered on behalf of the Purchaser and is a valid and
         binding agreement of the Purchaser enforceable in accordance with its
         terms, subject as to enforceability to general principles of equity and
         to applicable bankruptcy, insolvency, reorganization, moratorium,
         liquidation, and other similar laws relating to, or affecting
         generally, the enforcement of applicable creditors' rights and
         remedies.

                  (m) The Purchaser is a limited partnership organized under the
         laws of Bermuda.

                  (n) The Purchaser's acquisition of the Shares is not a
         transaction (or any element of a series of transactions) that is part
         of a plan or scheme by the Purchaser to evade the registration
         provisions of the Securities Act.

         SECTION 3. REPRESENTATIONS AND WARRANTIES OF THE COMPANY

         3.1. The Company represents and warrants to the Purchaser that:

                  (a) The Company is a corporation duly organized, validly
         existing, and in good standing under the laws of the State of Delaware,
         and has the requisite corporate power to own its properties and to
         carry on its business as now being conducted.

                  (b) The Company has the requisite corporate power and
         authority to enter into and perform this Agreement and to issue the
         Shares.

                  (c) The execution and delivery of this Agreement by the
         Company, and the consummation by it of the transactions contemplated
         hereby, including without limitation the issuance of the Shares, have
         been duly authorized by the Company's Board of Directors and no further
         consent or authorization is required by the Company, its Board of
         Directors or its stockholders.

                  (d) This Agreement has been duly executed and delivered by the
         Company and the persons signing on behalf of the Company have full
         power and authority to do so.

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<PAGE>   6

                  (e) This Agreement constitutes the valid and binding
         obligation of the Company enforceable against the Company in accordance
         with its terms, except as such enforceability may be limited by general
         principles of equity or applicable bankruptcy, insolvency,
         reorganization, moratorium, liquidation, or similar laws relating to,
         or affecting generally, the enforcement of creditors' rights and
         remedies.

                  (f) The Shares are duly authorized and, upon issuance in
         accordance with the terms hereof, shall be validly issued, fully paid,
         and nonassessable, and free from all taxes, liens, and charges with
         respect to the issue thereof.

                  (g) The execution, delivery, and performance of this Agreement
         by the Company, and the consummation by the Company of the transactions
         contemplated hereby, will not (i) result in a violation of the
         Certificate of Incorporation, any Certificate of Designation applicable
         to any Preferred Stock of the Company, or the Bylaws of the Company or
         (ii) conflict with, constitute a default (or an event which with notice
         or lapse of time or both would become a default) under, or give to
         others any rights of termination, amendment, acceleration, or
         cancellation of, any agreement, indenture, or instrument to which the
         Company is a party, or result in a violation of any law, rule,
         regulation, order, judgment, or decree (including federal and state
         securities laws and regulations) applicable to the Company or by which
         any property or asset of the Company is bound or affected.

                  (h) The Company acknowledges and agrees that the Purchaser is
         acting solely in the capacity of an arm's length purchaser with respect
         to this Agreement and the transactions contemplated hereby. The Company
         further acknowledges that the Purchaser is not acting as a financial
         advisor or fiduciary of the Company (or in any similar capacity) with
         respect to this Agreement or the transactions contemplated herein. The
         Company's decision to enter into this Agreement has been based solely
         on the independent evaluation by the Company and its representatives.

                  (i) Neither the Company, nor any of its affiliates, nor any
         person acting on its or their behalf (i) has engaged in any form of
         general solicitation or general advertising (within the meaning of
         Regulation D under the Securities Act) in connection with the offer or
         sale of the Shares; or (ii) has directly or indirectly made any offers
         or sales of any security or solicited any offers to buy any security,
         under circumstances that would require registration of the Shares under
         the Securities Act or cause this offering of the Shares to be
         integrated with prior offerings by the Company for purposes of the
         Securities Act or any applicable stockholder approval provisions.

                                       6
<PAGE>   7

                  (j) The Company understands that the Purchaser is purchasing
         the Shares in reliance on the exemption from the registration
         requirements of Section 5 of the Securities Act for offshore
         transactions as defined in SEC Rule 902(h), and that the Purchaser is
         relying in part upon the truth and accuracy of, and the Company's
         compliance with, the representations, warranties, agreements,
         acknowledgments, and understandings of the Company set forth herein in
         order to determine the availability of such exemptions and the
         eligibility of the Company to issue and sell the Shares to the
         Purchaser without having complied with those registration requirements.
         With respect to that exemption, the Company further represents and
         warrants to the Purchaser that (i) the Company has not offered any of
         the Shares to a U.S. Person (as defined in SEC Rule 902(k)) or to a
         person in the United States; (ii) the offer and sale of the Shares to
         the Purchaser is being made in an offshore transaction as defined in
         SEC Rule 902(h); (iii) the Company has not engaged in any directed
         selling efforts, as defined in SEC Rule 902(c), with respect to the
         Shares; and (iv) in offering and selling the Shares to the Purchaser,
         the Company has complied with all of the conditions required of it
         under SEC Regulation S.

                  (k) The Company is, and for more than the past 12 months it
         continuously has been, a "reporting company" under the Securities and
         Exchange Act of 1934, as amended (the "Exchange Act"), as defined by
         the rules and regulations of the SEC and the NASD, and has filed in a
         timely manner all reports and other information required by it to be
         filed with the SEC under the Exchange Act in order to remain a
         reporting company.

         SECTION 4. REGISTRATION RIGHTS

         4.1. As soon as is practicable after the Closing, the Company shall
file a registration statement (the "Registration Statement") with the SEC to
register the resale of the Shares, and shall use its best efforts to cause the
Registration Statement to become effective as soon as is reasonably practicable.
The Company shall use its best efforts to cause the registration statement to
remain effective for a period of one year from its effective date, or until the
Purchaser is no longer the owner of any Shares, whichever shall first occur.

         SECTION 5. GENERAL PROVISIONS

         5.1. This Agreement shall be governed by and interpreted in accordance
with the laws of the State of Delaware. The parties agree that the United States
District Court for the Southern District of New York, and the courts of the
State of New York located in the Borough of Manhattan, shall have exclusive
jurisdiction and venue for the adjudication of any civil action between them
arising out of relating to this Agreement, and hereby irrevocably consent to
such jurisdiction and venue.

         5.2. This Agreement may be executed in counterparts, each of which
shall be deemed an original, and all of which hall be considered one and the
same agreement.

         5.3. This agreement supersedes all other prior oral or written
agreements between the Purchaser, the Company, their affiliates and persons
acting on their behalf with respect to the issuance and sale of the Shares, and
this Agreement and the instruments referenced herein

                                       7
<PAGE>   8

contain the entire understanding of the parties with respect to the matters
covered herein and therein and, except as specifically set forth herein or
therein, neither the Company nor any Purchaser makes any representation,
warranty, covenant, or undertaking with respect to such matters. No provision of
this Agreement may be waived or amended other than by an instrument in writing
signed by the party to be charged with enforcement.

         5.4. Any notices, consents, waivers, or other communications required
or permitted to be given under the terms of this Agreement must be in writing
and will be deemed to have been delivered (a) upon receipt, when delivered
personally, (b) upon receipt, when sent by facsimile, (c) three (3) days after
being sent by certified mail, return receipt requested, or (d) one (1) day after
deposit with a nationally recognized overnight delivery service, in each case
properly addressed to the party to receive the same. The addresses and facsimile
numbers for such communications shall be:

         If to the Company:                       If to the Purchaser:

     The Ashton Technology Group, Inc.        CALP II Limited Partnership
     1835 Market Street, Suite 420            c/o Forum Fund Services
     Philadelphia, Pennsylvania 19103         Washington Mall, 3rd Floor
     Facsimile:   (215) ___-____              Hamilton, HM11, Bermuda
                                              Facsimile:  (441) 296-1301

         5.5. This Agreement shall be binding upon and inure to the benefit of
the parties and their respective successors and assigns.

         IN WITNESS WHEREOF, the Company and the Purchaser have caused this
Common Stock Purchase Agreement to be duly executed as of the Effective Date.

THE ASHTON TECHNOLOGY GROUP, INC.       CALP II LIMITED PARTNERSHIP

By  /s/ ARTHUR J. BACCI                 By  /s/ MARK VALENTINE
   ----------------------------------      ----------------------------------
Name    Arthur J. Bacci                 Name    Mark Valentine
   ----------------------------------      ----------------------------------
Title   President and COO               Title   Chairman
   ----------------------------------      ----------------------------------

                                       8<PAGE>

                                                                 Exhibit 10.15.3

                               AMENDMENT NO.  2

                                      TO

                            AT&T WIRELESS SERVICES
                     NETWORK MEMBERSHIP LICENSE AGREEMENT

     AMENDMENT NO. 2 TO NETWORK MEMBERSHIP LICENSE AGREEMENT ("Amendment") dated
as of November 13, 2000, by and between AT&T Corp., a New York corporation, with
offices located at 32 Avenue of the Americas, New York, New York 10013, for
itself and its affiliated companies, including AT&T Wireless Services, Inc.
(collectively "Licensor"), and TeleCorp PCS, Inc., a Delaware corporation, with
offices located at 1010 N. Glebe Road, Arlington, Virginia 22201 ("Licensee").
Certain capitalized terms used herein and not otherwise defined have the meaning
assigned to such term in the License Agreement referred to below.

     WHEREAS, Licensor and Licensee are parties to that certain Network
Membership License Agreement, dated as of July 17, 1998 (as amended, modified or
supplemented, and including the terms and conditions of the letter from Mary
Hawkins-Key to Andrew Price, dated October 20, 1998, the "License Agreement"),
pursuant to which Licensor agreed to license and allow Licensee to use the
Licensed Marks in the Licensed Territory on the terms set forth in the License
Agreement;

     WHEREAS, Licensee has entered into an Agreement and Plan of Reorganization
and Contribution with Tritel, Inc. and AT&T Wireless Services, Inc., dated as of
February 28, 2000, as amended (the "Merger Agreement"), pursuant to which, among
other things, Licensee agreed to extend the term of the License Agreement;

     WHEREAS, upon consummation of the Contribution (as defined in the Merger
Agreement), Licensee and Licensor desire, that the License Agreement be amended
to extend the term of the License Agreement and make other conforming changes on
the terms and conditions set forth in this Amendment; and

     WHEREAS, Licensee has entered into a letter agreement with AT&T Wireless
PCS, LLC dated February 28, 2000 (the "Letter Agreement"), pursuant to which,
among other things, Licensee agreed to expand or contract, as applicable, the
territories to which the License Agreement applies to include (or exclude, as
applicable) the territories covered by the licenses transferred to (or by) the
Company or an Affiliate (i) pursuant to that certain Asset Exchange Agreement by
and between TeleCorp PCS, Inc., certain of its affiliates, and AT&T Wireless
Services, Inc., dated as of February 28, 2000 (the "Asset Exchange Agreement")
and (ii) pursuant to the Contribution (as defined in the Merger Agreement).

     NOW THEREFORE, in consideration of the mutual promises and covenants herein
contained and for other good and valuable consideration the receipt and
sufficiency of which is hereby acknowledged, the parties hereby agree as
follows:
<PAGE>

1.  "Stockholder's Agreement."  All references in the License Agreement to the
     -----------------------
    "Stockholder's Agreement" are hereby amended to refer to that certain
    Stockholder's Agreement dated as of November 13, 2000 by and among Licensee,
    an Affiliate of Licensor and certain other stockholders of Licensee, as the
    same may be amended, modified or supplemented in accordance with the terms
    thereof.

2.  Amendment to Term.  Section 11.1(a) of the License Agreement is hereby
    -----------------
    amended by deleting the first sentence thereof in its entirety and inserting
    the following sentence in replacement therefor:

    "This Agreement shall commence on the date hereof and shall be in effect for
    a term ending July 17, 2005, unless terminated earlier pursuant to this
    Section 11."

3.  Amendment to Territory.  Schedule C to the License Agreement is hereby
    ----------------------
    deleted in its entirety and replaced with Schedule C attached hereto.

4.  Effectiveness of Amendment.  This Amendment shall become effective only upon
    --------------------------
    the consummation of the Contribution (as defined in the Merger Agreement).

5.  Severability of Provisions.  Any provision of this Amendment which is
    --------------------------
    prohibited or unenforceable in any jurisdiction shall, as to such
    jurisdiction, be ineffective to the extent of such prohibition or
    unenforceability without invalidating the remaining provisions hereof or
    affecting the validity or remaining provisions hereof or affecting the
    validity or enforceability of such provision in any other jurisdiction.

6.  Agreement to Remain in Full Force and Effect.  This Amendment shall be
    --------------------------------------------
    deemed to be an amendment to the License Agreement. All references to the
    License Agreement in any other agreements or documents shall on and after
    the date hereof be deemed to refer to the License Agreement as amended
    hereby. Except as amended hereby, the License Agreement shall remain in full
    force and effect and is hereby ratified, adopted and confirmed in all
    respects.

7.  Heading.  The headings in this Amendment are inserted for convenience and
    -------
    identification only and are not intended to describe, interpret, define or
    limit the scope, extent or intent of this Amendment or any provision
    thereof.

8.  Counterparts.  This Amendment may be executed in counterparts, each of which
    ------------
    shall be deemed an original, but all of which together shall constitute one
    and the same instrument.

9.  Applicable Law; Jurisdiction.  The construction, performance and
    ----------------------------
    interpretation of this Agreement shall be governed by the U.S. Trademark
    Act, 15 U.S.C. 1051 et seq., and the internal, substantive laws of the State
    of New York, without regard to its principles of conflicts of law; provided
    that if the foregoing laws should be modified during the term hereof in such
    a way as to adversely affect the original intent of the parties, the parties
    will negotiate in good faith to amend this Amendment to effectuate their
    original intent as closely as possible.

                                      -2-
<PAGE>

Executed as of the date first written above.

                                 AT&T CORP.

                                 By  /s/ Steven Garfinkel
                                     --------------------

                                 Name: Steven Garfinkel

                                 Its:   Assistant Secretary

                                 TELECORP PCS, INC.

                                 By  /s/ Thomas H. Sullivan
                                     ------------------------

                                 Name: Thomas H. Sullivan

                                 Its:   President, Treasurer and Secretary
<PAGE>

                                                                      SCHEDULE C
                                                                      ----------

TeleCorp Territory:
-------------------
<TABLE>
<CAPTION>
          Market                                                                BTA Market Designator
          ------                                                                ---------------------

I.        From New Orleans MTA
          --------------------
<S>       <C>                                               <C>
          Baton Rouge, LA                                                        32
          Lafayette-New Iberia, LA                                              236
          New Orleans, LA                                                       320
          Alexandria, LA                                                        009
          Houma-Thibodeaux, LA                                                  195
          Hammond, LA                                                           180

II.       From Dallas-Forth Worth MTA
          ---------------------------------------------
          Portions of the Monroe, LA BTA*:                                      304
                Ashley, AR
                Caldwell, LA
                Catahoula, LA
                *The Licensed Territory will include the Parishes of East
                Carroll, Franklin, Madison, Morehouse, Ouachita, Richland,
                Tensas, Union and West Carroll in the Monroe BTA necessary for
                TeleCorp to satisfy the FCC minimum build-out requirements
                pursuant to a build-out plan prepared by the Company and
                approved by AT&T, in its sole discretion, in accordance with
                Section 8.4(d) of the Stockholder's Agreement.

III.      From Houston, MTA
          -----------------
          Beaumont, TX                                                           34
          Lake Charles, LA                                                      238

IV.       From St. Louis MTA
          ------------------

          Cape Giradeau-Sikeston, MO                                             66
          Carbondale-Marion, IL                                                  67
          Columbia, MO                                                           90
          Jefferson City, MO                                                    217
          Kirksville, MO                                                        230
          Mount Vernon-Centralia, IL                                            308
          Poplar Bluff, MO                                                      355
          Quincy, IL-Hannibal, MO                                               367
          Rolla, MO                                                             383
          Portions of Springfield, MO BTA:                                      428
                Camden County, MO
                Cedar County, MO
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
          Market                                                                BTA Market Designator
          ------                                                                ---------------------
<S>                                                                             <C>
                Dallas County, MO
                Douglas County, MO
                Hickory County, MO
                Laclede County, MO
                Polk County, MO
                Stone County, MO
                Taney County, MO
                Texas County, MO
                Webster County, MO
                Wright County, MO

          West Plains, MO                                                           470

V.        From Little Rock MTA
          --------------------

          El Dorado-Magnolia-Camden, AR                                             125
          Fayetteville-Springdale-Rogers, AR                                        140
          Fort Smith, AR                                                            153
          Harrison, AR                                                              182
          Hot Springs, AR                                                           193
          Jonesboro-Paragould, AR                                                   219
          Little Rock, AR                                                           257
          Pine Bluff, AR                                                            348
          Russellville, AR                                                          387

VI.       From Memphis-Jackson MTA
          ------------------------

          Blytheville, AR                                                            49
          Dyersburg-Union City, TN                                                  120
          Jackson, TN                                                               211
          Portions of Memphis, TN BTA:                                              290
                Crittendon County, AR
                Cross County, AR
                Lee County, AR
                Phillips County, AR
                St. Francis County, AR
                Benton County, MS
                Coahoma County, MS
                DeSoto County, MS
                Grenada County, MS
                Lafayette County, MS
                Marshall County, MS
                Panola County, MS
                Quitman County, MS
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
          Market                                                                BTA Market Designator
          ------                                                                ---------------------
<S>                                                                             <C>
          Tallahatchie County, MS
          Tate County, MS
          Tunica County, MS
          Yalobusha County, MS
          Fayette County, TN
          Hardeman County, TN
          Haywood County, TN
          Lauderdale County, TN
          Shelby County, TN
          Tipton County, TN

VII.      From Louisville-Lexington-Evansville MTA
          ----------------------------------------
          Evansville, IN                                                            135
          Paducah-Murray-Mayfield, KY                                               339

VIII.     Portions of the Puerto Rico-U.S. Virgin
          ---------------------------------------
          Islands MTA
          -----------

          San Juan-Arecibo, Humacao                                                 488
          Mayaguez Aguadilla-Ponce                                                  489
          U.S. Virgin Islands                                                       491

IX.       From Milwaukee MTA
          ------------------

          Milwaukee                                                                 297
          Appleton-Oshkosh, WI                                                       18
          Fond du Lac, WI                                                           148
          Portions of Green Bay, WI BTA:                                            173
                Brown County, WI
                Door County, WI
                Kewaunee County, WI

          Janesville-Beloit, WI                                                     216
          Madison, WI                                                               272
          Manitowoc, WI                                                             276
          Sheboygan, WI                                                             417
          Portions of Marquette, MI BTA:                                            282
                Alger, MI
          Escabana, MI                                                              132
          Stevens Point-Marshfield, WI (4)                                          432
          Portions of the La Crosse, WI-Winona, MN                                  234
          BTA (4):
                Allamakee, IA
                Buffalo, WI
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
          Market                                                                BTA Market Designator
          ------                                                                ---------------------
<S>                                                                             <C>
                Houston, MN
                Jackson, WI
                La Crosse, WI
                Monroe, WI
                Vernon, WI
                Winona, MN

X.        From Des Moines-Quad City, IA MTA
          ---------------------------------
          Fort Dodge, IA                                                            150
          Waterloo-Cedar Falls, IA                                                  462
          Davenport, IA - Moline, IL                                                105
          Dubuque, IA                                                               118
          Iowa City, IA                                                             205
          Burlington, IA                                                             61
          Clinton, IA - Sterling, IL                                                 86
          Des Moines, IA                                                            111
          Marshall Town, IA(3)                                                      283
          Mason City, LA(3)                                                         285
          Ottumwa, IA(3)                                                            337
          Cedar Rapids, IA (4)                                                       70
          Sioux City, IA (3)                                                        421
</TABLE>

(3)  The Licensed Territory shall be amended to include this market without any
further action by the parties hereto upon the acquisition by the Company of a
PCS License covering this market, if and only if, such PCS License is acquired
(i) on or before November 13, 2002, or (ii) pursuant to an agreement to acquire
such PCS License entered into by the Company on or before November 13, 2002, it
being understood that if the Company does not acquire, or enter into an
agreement to acquire, a PCS License covering this market on or before November
13, 2002, the Territory shall not be amended to include this market without AT&T
PCS's prior written consent.

(4)  The Licensed Territory shall be amended to include this market without any
further action by the parties hereto upon the acquisition by the Company of a
PCS License covering this market, if and only if, such PCS License is: (i) held
or formerly held by Airadigm Communications, Inc. ("Airadigm") and acquired by
the Company either (A) from Airadigm through the bankruptcy proceeding In Re
Airadigm Wireless Communications, Inc., in the United States Bankruptcy Court
for the Western District of Wisconsin, Case No.

99-33500-11 (the "Bankruptcy Proceeding"), or (B) through a Federal
Communications Commission re-auction of the PCS licenses formerly held by
Airadigm (the "Re-auction"), as contemplated in the side letter between AT&T
Wireless PCS, LLC and TeleCorp PCS, Inc., dated February 28, 2000, (ii) acquired
pursuant to the right of first offer granted to the Company by AT&T Wireless
Services, Inc. pursuant to that certain Letter Agreement dated November 13, 2000
between the Company and AT&T Wireless PCS, Inc., or (iii) acquired through any
other
<PAGE>

means, provided, as to (iii) only, that such licenses are acquired prior to or
contemporaneously with the later of (Y) the FCC Re-auction, or (Z) the closing
of the Bankruptcy Proceeding.

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