1. To view and manage data on your phone use star codes via Menu > Contacts > AT&T Service Contacts.
   
2. 225# AT&T CHECK BILL BALANCE. Check invoice balance and last payment received.
   
3. *729 AT&T PAY MY BILL. Make payment on an invoice.
   
4. *3282# AT&T VIEW DATA USAGE. Check remaining data/text package balance.
   
5. *646# AT&T VIEW MY MINUTES. Check remaining minute balance.