I had one, before changing my account to go phone, but know that I switch I never had one.
In the page were you sign in has an asterisk and says that are the last four digit of your phone number, I tried and it didn't work, somebody told me to put the last four digit of my SS#, also it didn't work, and called several times to AT&T and the called cant get through because ask me for the four digits.
In the page were you sign in has an asterisk and says that are the last four digit of your phone number, I tried and it didn't work, somebody told me to put the last four digit of my SS#, also it didn't work, and called several times to AT&T and the called cant get through because ask me for the four digits.