After writing down these numbers, you're ready to activate your AT&T SIM. How to activate your AT&T prepaid card After you install your SIM card or download your eSIM by scanning the QR code, AT&T ...

BENTONVILLE, Ark. -- Wal-Mart Stores here has chosen AT&T as its new prepaid calling-card vendor.&T will distribute more than $100 million worth of prepaid cards through Wal-Mart ...

Now, AT&T is offering customers a way to combat this kind of crime. Available starting today, Wireless Account Lock is an option for AT&T subscribers with postpaid or prepaid wireless accounts.