Primary and secondary account holders can now block specific transactions and account changes across all devices and lines on their account.

Available starting today, Wireless Account Lock is an option for AT&T subscribers with postpaid or prepaid wireless accounts. Simply by turning on a switch in the myAT&T app, you can enable Account Lock to prevent unauthorized changes to your account and phone lines.

If you're an AT&T customer, you can turn on a new security feature that prevents your phone number from being moved to a different device without your knowledge, exposing your data to cyber criminals in the process.