AT&T has now introduced a new feature called “Wireless Account Lock” which enhances the security of your wireless account and protect other online accounts from unauthorized access:
Introducing Wireless Account Lock – and other tips for extra protection of online accounts
AT&T - July 1, 2025
https://about.att.com/story/2025/wireless-account-lock.html
If you want extra protection from unauthorized changes to your AT&T wireless account, we’ve introduced a free feature. Wireless Account Lock disables several key account changes including billing updates or wireless number transfers. You can lock and unlock it at any time.
The switch – a toggle button – is on your phone’s myAT&T app for postpaid consumer wireless accounts.
The lock forces an extra step before important account changes can be made. It prevents anyone from buying a device on the account, for example, or conducting a SIM swap – moving a phone number to a SIM in a different device……
