I was helping my girlfriend change her back up phone number on the yahoo website and it sent us in circles. It would have us log into the Yahoo log in page then in order to access the account security we would have to log in through the AT&T log in. Once we logged on to AT&T, it would just give us information as to how to change the yahoo recovery phone number. Which sent us right back to the yahoo log in. We followed the instructions and when we got to the account security page, all you can see is a change your password link. There is no link or information on changing or updating recovery phone/email address.