Document:

Exhibit 10.6

December 22, 2000

AT&T Wireless PCS, LLC
7277 164th Avenue, N.E.
Redmond, WA 98052

          Re:  Amendment No. 1 to Letter Agreement Dated November 13, 2000
               Regarding Sale of Subject Shares

Ladies and Gentlemen:

          Reference is made to that certain letter agreement, dated November 13,
2000 (the "Letter Agreement"), between AT&T Wireless PCS, LLC ("AT&T PCS"), and
Gerald T. Vento (the "Management Stockholder"), setting forth certain rights and
obligations with respect to the shares of Voting Preference Stock, par value
$0.01 per share, Class C Common Stock, par value $0.01 per share, and Class D
Common Stock, par value $0.01 per share, (collectively, the "Subject Stock") of
TeleCorp PCS, Inc. (the "Company") held by the Management Stockholders. Defined
terms used herein and not otherwise defined shall have the meanings assigned in
the Letter Agreement.

          1. Notwithstanding anything to the contrary contained in the Letter
Agreement or in any Notice delivered pursuant thereto, in the event AT&T
exercises its rights and option under Section 2 of the Letter Agreement to
purchase (or designate another party to purchase) Subject Shares, the purchase
price per share payable by AT&T PCS (or such designee) for any such Subject
Shares shall be equal to the lesser of (i) the purchase price per share set
forth in the notice, and (ii) the average closing price per share for the
Company's Class A Common Stock for the five (5) trading days ending two (2) days
prior to the date of execution of the Sale Offer. Section 13 of the Letter
Agreement is hereby deleted in its entirety and the Letter Agreement shall have
no expiration date.

          2. This letter shall be deemed to be an amendment to the Letter
Agreement. All references to the Letter Agreement in any other agreements or
documents shall on and after the date hereof be deemed to refer to the Letter
Agreement as amended hereby. Except as amended hereby, the Letter Agreement
shall remain in full force and effect and is hereby ratified, adopted and
confirmed in all respects.

          3. This letter 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.

                                        1

<PAGE>

          If you are in agreement with the terms of this letter, please sign two
copies in the space provided below and return it to the undersigned.

                                   Very truly yours,

                                   AT&T WIRELESS SERVICES, INC.

                                   By:
                                      ------------------------

                                   Title:
                                         ---------------------

Agreed and accepted as of the date hereof:

-----------------------------------------
GERALD T. VENTOExhibit 10.7

December 22, 2000

AT&T Wireless PCS, LLC
7277 164th Avenue, N.E.
Redmond, WA 98052

          Re:  Amendment No. 1 to Letter Agreement Dated November 13, 2000
               Regarding Sale of Subject Shares

Ladies and Gentlemen:

          Reference is made to that certain letter agreement, dated November 13,
2000 (the "Letter Agreement"), between AT&T Wireless PCS, LLC ("AT&T PCS"), and
Thomas H. Sullivan (the "Management Stockholder"), setting forth certain rights
and obligations with respect to the shares of Voting Preference Stock, par value
$0.01 per share, Class C Common Stock, par value $0.01 per share, and Class D
Common Stock, par value $0.01 per share, (collectively, the "Subject Stock") of
TeleCorp PCS, Inc. (the "Company") held by the Management Stockholders. Defined
terms used herein and not otherwise defined shall have the meanings assigned in
the Letter Agreement.

          1. Notwithstanding anything to the contrary contained in the Letter
Agreement or in any Notice delivered pursuant thereto, in the event AT&T
exercises its rights and option under Section 2 of the Letter Agreement to
purchase (or designate another party to purchase) Subject Shares, the purchase
price per share payable by AT&T PCS (or such designee) for any such Subject
Shares shall be equal to the lesser of (i) the purchase price per share set
forth in the Notice, and (ii) the average closing price per share for the
Company's Class A Common Stock for the five (5) trading days ending two (2) days
prior to the date of execution of the Sale Offer. Section 13 of the Letter
Agreement is hereby deleted in its entirety and the Letter Agreement shall have
no expiration date.

          2. This letter shall be deemed to be an amendment to the Letter
Agreement. All references to the Letter Agreement in any other agreements or
documents shall on and after the date hereof be deemed to refer to the Letter
Agreement as amended hereby. except as amended hereby, the Letter Agreement
shall remain in full force and effect and is hereby ratified, adopted and
confirmed in all respects.

          3. This letter 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.

                                        1

<PAGE>

          If you are in agreement with the terms of this letter, please sign two
copies in the space provided below and return it to the undersigned.

                                   Very truly yours,

                                    AT&T WIRELESS SERVICES, INC.

                                    By:
                                        ------------------------
                                    Title:
                                           ---------------------

Agreed and accepted as of the date hereof:

-------------------------------------------
THOMAS H. SULLIVANExhibit 10.8

                      RIGHT OF FIRST NEGOTIATION AGREEMENT

          This Right of First Negotiation Agreement dated as of ___________,
2000, by and between AT&T WIRELESS PCS, LLC ("AT&T PCS") and ___________
("Lender") regarding certain securities of TELECORP PCS, INC. (the "Company")
which may be pledged to Lender by certain holders of Class A Voting Common
Stock, $.01 par value per share, of the Company (the "Common Stock") issued
pursuant to the TeleCorp PCS, Inc. 1998 Restricted Stock Plan (the "Restricted
Stock Plan") set forth on Schedule I hereto (collectively, the "Restricted
Stockholders").

          WHEREAS, AT&T PCS and others are parties to certain Stockholders'
Agreements, set forth on Schedule II, with each of the Restricted Stockholders
(collectively, the "Restricted Stockholders' Agreements") pursuant to which,
among other things, such parties entered into certain agreements regarding the
transfer of the shares of the Company's capital stock owned by each Restricted
Stockholder;

          WHEREAS, each Restricted Stockholder may desire to pledge certain
Pledged Shares (defined below) to Lender in order to obtain a personal margin
loan, and if obtained Lender would be free to sell such Restricted Stockholder's
Pledged Shares without restriction (except as set forth herein), in whole or in
part, pursuant to certain agreements between Lender and such Restricted
Stockholder.

          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:

          1. Waiver. AT&T agrees that, notwithstanding any provisions set forth
in the Restricted Stockholders' Agreements, each Restricted Stockholder shall be
entitled to pledge to Lender, in connection with obtaining a personal margin
loan (a "Margin Loan"), up to the amount of shares of Common Stock owned by him
which have vested pursuant to the Restricted Stock Plan as of the date such
Restricted Stockholder obtains the Margin Loan (collectively, the "Pledged
Shares"), and that such financial institution shall be free to sell the Pledged
Shares of such Restricted Stockholder to satisfy the Restricted Stockholder's
Margin Loan, subject to Lender's obligations in Section 2 below, pursuant to the
terms of its agreement(s) with such Restricted Stockholder. Notwithstanding any
of the foregoing, the terms and conditions regarding the termination of transfer
restrictions set forth in the Restricted Stockholders' Agreements shall remain
in full force and effect.
<PAGE>

          2. Right of First Negotiation. (a) At any time Lender desires to sell
all or any part of any Pledged Shares, Lender shall submit a written offer to
sell such shares (the "Offered Shares") to AT&T PCS (the "Offer") by facsimile
to the number specified below herein. For the applicable first negotiation
period hereinafter set forth, AT&T PCS shall have the exclusive right to
negotiate with Lender with respect to the purchase of the Offered Shares; it
being understood and agreed that such exclusive right shall not be deemed to be
a right of first offer or right of first refusal for the benefit of AT&T PCS and
Lender shall have the right to reject any offer made by AT&T PCS during such
applicable first negotiation period. AT&T PCS agrees that any offer made by it
(other than as provided in clause (1) of Section 2(c)) shall be for a price per
share of Common Stock not lower than the average Per Share Market Value for the
five (5) Trading Days immediately preceding the date of the offer. "Per Share
Market Value" means on any particular date (a) if the Common Stock is listed on
The Nasdaq National Market or Nasdaq Small Cap Market or any stock exchange, the
closing bid price per share of the Common Stock on such date on The Nasdaq
National Market or Nasdaq Small Cap Market or other stock exchange on which the
Common Stock is listed or if there is no such price on such date, then the
closing bid price per share of the Common Stock on The Nasdaq National Market or
Nasdaq Small Cap Market or other stock exchange on the date nearest preceding
such date, or (b) if the Common Stock is not listed on The Nasdaq National
Market or Nasdaq Small Cap Market or any stock exchange, the closing bid price
for a share of Common Stock in the over-the-counter market, as reported by the
Nasdaq Stock Market at the close of business on such date, or (c) if the Common
Stock is not quoted on the Nasdaq Stock Market, the closing bid price for a
share of Common Stock in the over-the-counter market as reported by the National
Quotation Bureau Incorporated (or similar organization or agency succeeding to
its functions of reporting prices), or (d) if the Common Stock is not reported
by the National Quotation Bureau Incorporated (or similar organization or agency
succeeding to its functions of reporting prices), then the average of the "Pink
Sheet" quotes for the relevant period, as determined in good faith by AT&T PCS.
"Trading Day" means (i) if the Common Stock is listed on The Nasdaq National
Market or Nasdaq Small Cap Market or any stock exchange, a day on which the
Common Stock is traded on The Nasdaq National Market or Nasdaq Small Cap Market
or principal stock exchange on which the Common Stock is listed, or (ii) if the
Common Stock is not listed on The Nasdaq National Market or Nasdaq Small Cap
Market or any stock exchange, a day on which the Common Stock is traded in the
over-the-counter market, as reported by the Nasdaq Stock Market, or (iii) if the
Common Stock is not quoted on the Nasdaq Stock Market, a day on which the Common
Stock is quoted in the over-the-counter market as reported by the National
Quotation Bureau Incorporated (or any similar organization or agency succeeding
its functions of reporting prices) or (iv) if the Common Stock is not reported
by the National Quotation Bureau Incorporated (or similar organization or agency
succeeding to its functions of reporting prices), a day on which the Common
Stock is quoted in the "Pink Sheet" quotes for such day. AT&T PCS agrees that
any offer made by it as provided in clause (1) of Section 2(c) shall be at a
price per share of Common Stock equal to the price per share at which the Common
Stock is sold to the underwriters in such registered offering.

      (b) Upon the expiration of such applicable first negotiation period,
Lender shall have the right (for the applicable offer period hereinafter set
forth with respect to each applicable first negotiation period), following the
expiration of such applicable first negotiation period, to offer and sell such
Offered Shares included in such written notice on such terms and conditions as
shall be acceptable to Lender in its sole discretion. If any of such Offered
Shares included in such written notice are not sold pursuant to the provisions
of this Section prior to the expiration
<PAGE>

of the applicable offer period, such Offered Shares shall become subject once
again to the provision and restrictions hereof.

          (c) If Lender desires to sell any Offered Shares (1) pursuant to a
registration of Common Stock of the Company in an underwritten offering that
constitutes a bona fide distribution of such Common Stock pursuant to such
registration, the applicable first negotiation period shall be ten (10) days and
the applicable offer period upon the expiration of such first negotiation period
shall be one hundred twenty (120) days, (2) pursuant to Rule 144, the applicable
first negotiation period shall be three (3) hours (it being understood and
agreed that Lender shall, in addition to providing the Offer by facsimile, use
commercially reasonable efforts to contact AT&T PCS by telephone in accordance
with the notice provisions hereof) and the applicable offer period upon the
expiration of such first negotiation period shall be five (5) business days, and
(3) in any single transaction or series of related transactions to one or more
persons which will result in the sale by Lender (together with any other
stockholder of the Company, including the Restricted Stockholders, participating
in such single transaction or series of related transactions) of not more than
ten percent (10%) of the Common Stock of the Company on a fully diluted basis
(excluding for such purposes the Company's Series A Preferred Stock), the
applicable first negotiation period shall be one (1) business day, so long as
the Offer is given to AT&T PCS prior to 9:00 A.M. on the day prior to the date
of such proposed sale (it being understood and agreed that Lender shall, in
addition to giving written notice of such proposed sale by facsimile, use
commercially reasonable efforts to contact AT&T PCS by telephone in accordance
with the notice provisions hereof) and the applicable offer period upon the
expiration of such first negotiation period shall be ten (10) business days.

          (d) Notwithstanding any of the foregoing, AT&T PCS' rights with
respect to the Pledged Shares shall terminate concurrently with and in the same
manner as the termination of transfer restrictions set forth in the Restricted
Stockholders' Agreements.

          2.  Notices. All notices or other communications hereunder shall be in
writing and shall be given (and shall be deemed to have been duly given upon
receipt) by delivery by facsimile transmission with an electronic
acknowledgement of receipt addressed as follows (or to such other address for a
party as shall be specified by like notice):

               If to AT&T PCS:

                  c/o AT&T Wireless Services, Inc.
                  7277 164th Ave., N.E.
                  Redmond, WA  98052
                  Attention:  William W. Hague
                  Telephone:  (425) 580-8416
                  Facsimile:   (425) 580-8405

               If to Lender:

<PAGE>

          IN WITNESS WHEREOF, each of the parties has executed this Agreement by
its duly authorized officers as of the date first written above.

                                        AT&T WIRELESS PCS, LLC

                                        By
                                           -----------------------------
                                        Its
                                           -----------------------------

                                        [LENDER]

                                        By
                                           -----------------------------
                                        Its
                                           -----------------------------

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