AT&T Z331 Quick Start Manual page 13

myAT&T
myAT&T allows you to manage your wireless and
AT&T U-verse
®
Check your data usage, pay your bill, and more.
From standby mode, press the Right Soft Key
for Menu.
Select myAT&T (9).
Enter your phone number and password and
select Enter to log in.
account from your mobile phone.