Exhibit 5


295 North Maple Ave.
Basking Ridge, NJ 07920


August 10, 2000


AT&T Corp.
32 Avenue of the Americas
New York, NY  10013

Dear Sirs:

     With  reference  to the  registration  statement  on Form  S-8  which  AT&T
Corp.(the   "Company")  proposes  to  file  with  the  Securities  and  Exchange
Commission (the "SEC") under the Securities Act of 1933, as amended, registering
60,000,000  shares of AT&T Wireless  Group Common Stock (par value $1 per share)
(the "Shares")  which may be offered and sold by the Company under the AT&T Long
Term Savings Plan for Management Employees,  AT&T Long Term Savings and Security
Plan, AT&T Retirement Savings and Profit Sharing Plan, AT&T of Puerto Rico, Inc.
Long Term Savings and  Security  Plan and AT&T of Puerto  Rico,  Inc.  Long Term
Savings  Plan for  Management  Employees,  AT&T  Long  Term  Savings  Plan - San
Francisco and AT&T Wireless Services 401(k) Retirement Plan  (collectively,  the
"Plans"),  which  Shares,  under the terms of the  Plans may be  authorized  and
unissued shares or treasury shares, I am of the opinion that:

     1.  the  Company is a corporation  duly organized,  validly existing and in
good standing under the laws of the State of New York;

     2. all proper  corporate  proceedings have been taken so that any Shares to
be offered and sold which are newly issued have been duly  authorized  and, upon
sale and payment  therefor in accordance  with the Plans and the  resolutions of
the Board of  Directors  relating  to the  offering  and sale of  common  shares
thereunder, will be legally issued, fully paid and nonassessable.

     I hereby  consent to the filing of this opinion with the SEC in  connection
with the registration statement referred to above.

                                  Very truly yours,

                                  /s/ Robert S. Feit
                                  ---------------------
                                  Robert S. Feit