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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13D

                               (AMENDMENT NO. 3)*


  INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13D-1(A) AND
               AMENDMENTS THERETO FILED PURSUANT TO RULE 13D-2(A)

                               TELECORP PCS, INC.
      --------------------------------------------------------------------
                                (Name of Issuer)

                 CLASS A COMMON STOCK, $0.01 PAR VALUE PER SHARE
    ------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   879300 10 1
          ------------------------------------------------------------
                                 (CUSIP Number)

                             MARILYN J. WASSER, ESQ.
                       VICE PRESIDENT - LAW AND SECRETARY
                                   AT&T CORP.
                             295 NORTH MAPLE AVENUE
                             BASKING RIDGE, NJ 07920
                                 (908) 221-2000


 ------------------------------------------------------------------------------
            (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)

                                  JULY 9, 2001
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             (Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition that is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following
box: |_|

      NOTE: Schedules filed in paper format shall include a signed original and
five copies of the schedule, including all exhibits. See Rule 13d-7 for other
parties to whom copies are to be sent.



*  The remainder of this cover page shall be filled out for a reporting person's
   initial filing on this form with respect to the subject class of securities,
   and for any subsequent amendment containing information which would alter
   disclosures provided in a prior cover page.

   The information required on the remainder of this cover page shall not be
   deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
   Act of 1934 ("Act") or otherwise subject to the liabilities of that section
   of the Act but shall be subject to all other provisions of the Act (however,
   see the Notes).





                         (Continued on following pages)
                                Page 1 of 4 Pages




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CUSIP NO. 256069105           SCHEDULE 13D                    PAGE 2 OF 4
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  1   NAME OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
      AT&T CORP.
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  2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                (a) |_|
                                                                       (b) |_|
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  3   SEC USE ONLY                                                         |_|
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  4   SOURCE OF FUNDS (See Instructions)    N/A
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  5   CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
      TO ITEMS 2(D) OR 2(E)                                                |_|
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  6   CITIZENSHIP OR PLACE OF ORGANIZATION
      NEW YORK
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   NUMBER OF      7   SOLE VOTING POWER
     SHARES           -O-
  BENEFICIALLY
 OWNED BY EACH
   REPORTING
  PERSON WITH
                 ---------------------------------------------------------------
                  8   SHARED VOTING POWER
                      -O-
                 ---------------------------------------------------------------
                  9   SOLE DISPOSITIVE POWER
                      -O-
                 ---------------------------------------------------------------
                  10  SHARED DISPOSITIVE POWER
                      -O-
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 11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
      -O-
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 12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
      CERTAIN SHARES*                                                      |_|
--------------------------------------------------------------------------------
 13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
      -O-
--------------------------------------------------------------------------------
 14   TYPE OF REPORTING PERSON*
      CO
--------------------------------------------------------------------------------

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!



      This Schedule 13D amends with respect to AT&T Corp. ("AT&T") the statement
on Schedule 13D initially filed by AT&T Corp., AT&T Wireless Services, Inc.
("AT&T Wireless Services") and AT&T Wireless PCS, LLC on November 27, 2000. This
amendment is being filed to reflect the split-off of AT&T Wireless Services from
AT&T on July 9, 2001, as a result of which AT&T Wireless Services became an
independent, publicly traded company. Consequently, AT&T no longer has any
beneficial ownership of the Class A Common Stock of the Issuer.

      In connection with the foregoing, the Schedule 13D is amended and
supplemented as follows:


ITEM 2.     IDENTITY AND BACKGROUND.

            AT&T is no longer a Reporting Person. Item 2 is hereby amended by
removing all references to AT&T, including the second paragraph of Item 2 and
Schedule 1-A.

ITEM 4.     PURPOSE OF THE TRANSACTION.

      AT&T is no longer a Reporting Person. Item 4 is hereby amended by removing
all references to AT&T.

ITEM 5.     INTEREST IN SECURITIES OF THE ISSUER.

            Items 5(a) - (e) are hereby amended and supplemented by the addition
of the following paragraphs hereto:

            The responses to Items 7 through 13 on the cover page of this
Amendment provided for AT&T that relate to the beneficial ownership of the Class
A Common Stock of the Issuer, are incorporated herein by reference. As of July
9, 2001, AT&T is no longer the sole member of AT&T PCS and may no longer be
deemed to beneficially own the shares held by AT&T PCS.

             (e) As of July 9, 2001, AT&T is no longer a beneficial owner of any
of the Class A Common Stock of the Issuer. AT&T has not executed transactions in
the Class A Common Stock during the past 60 days.


                                   Page 3 of 4



                                    SIGNATURE

            After reasonable inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true, complete and
correct.

Date:  July 20, 2001                  AT&T CORP.



                                      By:   /s/ John Thompson
                                         ---------------------------------
                                         Name:  John Thompson
                                         Title: Assistant Secretary









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