Go to att.com/fastpay. · Choose your service. · Enter your AT&T phone number or account info and ZIP Code. · Enter your payment amount and details.
Learn Ways to Pay Your AT&T Bill
https://www.att.com/support/article/my-account/KM1009340/
Make a bill payment online without signing in! Just provide your account number or active AT&T phone number and easily pay your bill online.
FAQ
How can I pay my AT&T bill without logging in?
Can I pay without signing in to my AT&T account? Yes. Use your account number or active AT&T phone number to make a payment. Be sure to have your payment amount in mind.
How do I pay my AT&T bill online?
Sign in to myAT&T to view your bill, make a payment, and manage your account. U-verse® TV, AT&T Phone℠, or AT&T Internet with any other service(s) – Sign in with your Member ID.
How do I make a one time payment with AT&T?
To pay by mail, see your AT&T bill for the payment mailing address in your area. Pay by Phone. To pay by phone, dial 611 from your AT&T wireless device or call 800.331. 0500 from any phone in the United States.