AT&T offers a program called Auto Refill that lets customers set up automatic periodic payments from a bank account, debit card or credit card. GoPhone customers can set up Auto Refill or manually refill at any time using the account manager on AT&T's official website.
Set up Auto Refill using the myAT&T app available on Android and iOS devices. Log in to the app using the phone number of the mobile device being refilled and the password to the account. If no password has been chosen, the default password is the last four digits of the phone number used to log in. Auto Refill is found under the Add Packages menu.