How to lock your SIM on Android

Your phone's SIM card allows the device to make calls, send texts, and connect to the internet. The SIM card provides a phone ...
The Verge

AT&T now lets you lock down your account to prevent SIM swapping attacks

The carrier’s new Account Lock feature will prevent unauthorized changes to your account, including phone number and SIM card transfers. The carrier’s new Account Lock feature will prevent ...
Ars Technica

AT&T rolls out Wireless Account Lock protection to curb the SIM-swap scourge

AT&T is rolling out a protection that prevents unauthorized changes to mobile accounts as the carrier attempts to fight a costly form of account hijacking that occurs when a scammer swaps out the SIM ...