AT&T has introduced a new security feature called "Wireless Lock" to help protect customers from SIM swapping attacks by preventing unauthorized changes to account information and number porting. This feature, which can be managed through the AT&T app or website, enhances security by restricting access even to AT&T employees, although it arrives later than similar offerings from competitors like Verizon. SIM swap attacks have become increasingly common, leading to significant financial losses and breaches of personal accounts.