People refill AT&T prepaid two ways: adding credit to their own account before it runs out, or sending it to a relative's AT&T phone. Either way, you don't need a physical refill card from a store: doctorSIM posts the credit online, and it's worked this way since 2006.
Refill AT&T in the US or Puerto Rico
There are two AT&T pages, one per country: AT&T United States and AT&T Puerto Rico. They're separate accounts on separate systems, so use the page that matches where the phone is actually registered, not where you're standing when you pay.
Sending a refill instead of your own
A lot of AT&T refills here are for someone else, usually a parent or relative back home whose AT&T prepaid line is about to run dry. You don't need their account login or PIN, and you don't need to register the number to your name: just the phone number, a payment method, and it's done. Both of you get a confirmation, so there's no guessing whether the refill went through.
Frequently asked questions
Can I refill an AT&T prepaid account without the physical refill card?
Yes. You only need the phone number; the credit is added online, no card or PIN required.
How long does an AT&T refill take to post?
It posts within seconds of the payment clearing, any time of day.
Can I refill someone else's AT&T prepaid line?
Yes, without needing their account password: the phone number is enough to send credit to any AT&T prepaid line.
Is refilling AT&T in Puerto Rico the same as in the US?
No, they run on separate accounts: use the Puerto Rico page for a Puerto Rico number and the United States page for a US number.
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