AT&T has introduced a new security feature called Wireless Account Lock (also referred to as “Wireless Lock” or “Account Lock”) to protect customers from SIM swap attacks—a type of fraud where attackers transfer a victim’s phone number to a SIM card under their control to intercept calls, texts, and two-factor authentication codes. This feature is now available to all AT&T customers, including both individual and business accounts, after a phased rollout that began earlier in the year.
How Wireless Account Lock Works
Customers can enable or disable Wireless Account Lock directly through the myAT&T app on a device linked to their account. When enabled, the lock prevents a range of sensitive account changes, including SIM or eSIM swaps between devices, phone number transfers (porting to another device or provider), changes to billing information, changes to authorized users, device purchases or upgrades billed to the account, and addition of new lines.
Any time the lock is toggled on or off, AT&T sends an email to the primary account holder and a text message to every active wireless number on the account, ensuring transparency and alerting users to any changes. Only users with primary or secondary access to the account can manage the lock. For standalone devices like tablets or hotspots, customers must contact AT&T directly for assistance. AT&T prepaid customers are also covered by a similar version of the lock, adapted for their account structure.
Why This Matters
SIM swap attacks have become increasingly common and have been linked to major security breaches, including theft of cryptocurrency and unauthorized access to sensitive accounts. Attackers often use social engineering or bribe telecom employees to facilitate SIM swaps, making technical and procedural protections like Wireless Account Lock crucial. Other carriers such as Verizon, T-Mobile, and Google Fi have offered similar protections for several years.
How to Use
Open the myAT&T app, sign in, go to the “Mobile Security” section, and select “Wireless Lock” to turn the feature on or off. When you need to make legitimate changes (e.g., upgrade your device), simply disable the lock, complete your transaction, and re-enable it afterward.
Limitations
The lock does not affect non-wireless services (like AT&T internet or TV accounts). And certain actions, such as making payments or changing plans, are still allowed even when the lock is enabled.
