If you have multiple accounts linked to your AT&T Access ID, select the appropriate Wireless account.
Select the menu
Select Billing & payments, and then select the Make payment
Select a Payment date. Available dates are based on your eligibility.
Select a payment method and enter your payment information if necessary. If you're using the myAT&T app1 for iOS or Android, you can select Scan to automatically input your checking account information from a check.