2 years ago
Last edited at 12:35PM on 5/14/2011
You can use your old T-mobile account with your new AT&T account by activating it according to the instructions given on the new one. You should first check if the account is eligible to be transferred, and then provide information such as, the account number, the address and the name of the account holder. It is also possible to transfer all your numbers from the old account although it may take a longer period, AT&T can ensure you use the old account and even activate it for you.