Sign up for AT&T AutoPay by accessing your myAT&T online account from your PC, tablet or smartphone. You can only enroll in AutoPay through your online myAT&T account. If you do not have an account, you can create one for free by registering online, according to AT&T.
Once your myAT&T account is established, you can enroll in AutoPay from your tablet or PC by hovering over Billing & Usage and selecting Manage AutoPay. Select the account you want linked to AutoPay along with the desired payment method, then enter your account confirmation and click Continue. Review the terms and conditions of the policy and click Submit to process the request. If you are enrolled in TXT-2-Pay, text yes when prompted to enroll in AutoPay.
To enroll in AutoPay form your smartphone, access your account from the myAT&T app. Select the Menu button, then click Billing & Payments, followed by Enroll in AutoPay. Choose your last payment method or enter a new checking or savings account as your desired payment method, then select Continue. Review the terms and conditions of the policy, then click Submit to enroll in AutoPay. Be aware that it may take between four to six weeks for your AutoPay request to process, according to AT&T.