Guide to login your SBCglobal.net account Step 1: A user has to go to Yahoo's Att.net login page or a user can simply go to the att.net and find the option for the sign in. ... Step2: In the second step the user has to enter the AT&T ID or the SBCglobal.net email. Step3: the final step is very easy. SBCglobal Net Email Login | SBC Mail | SBCglobal Mail