<ul data-eligibleForWebStory="false">AT&T has introduced a new feature called Wireless Account Lock to protect consumer and business accounts from SIM-swapping attacks.The feature can disable key account changes, preventing attackers from gaining control of a victim's phone number through SIM-swapping.Users can toggle the feature on or off in the myAT&T app, adding an extra step before upgrading a device or changing important account details.AT&T has also introduced Business Account Lock for business users to enhance security against malicious insiders and cyber threats.