AT&T has rolled out a new security feature called “Wireless Lock” to all customers, designed to protect against increasingly common SIM swapping attacks. The feature, which has been available to select customers for nearly a year, represents AT&T’s effort to catch up with competitors in mobile security.
## How Wireless Lock Works
The new feature allows customers to “lock” their phone numbers through AT&T’s mobile app or website, preventing unauthorized changes to their accounts. When enabled, Wireless Lock blocks:
– Phone number porting to new SIM cards
– Transfers to other carriers
– Changes to billing information
– Modifications to authorized users
– Phone number changes
Importantly, even AT&T employees cannot make these changes while the lock is active, requiring customers to first disable the setting before any modifications can be made.
Business accounts receive enhanced features, including the ability to exempt specific lines from the lock and restrict particular account changes when the feature is enabled.
## The SIM Swapping Threat
SIM swap attacks occur when cybercriminals transfer a victim’s phone number to a device they control. This allows attackers to intercept calls, text messages, and multi-factor authentication codes, potentially compromising email accounts, banking services, and cryptocurrency wallets.
These attacks often succeed through social engineering or bribing telecom employees to transfer numbers from legitimate customers’ SIM cards to attacker-controlled devices.
## Recent Attack Examples
SIM swapping has been linked to numerous high-profile security incidents:
– In 2020, Joseph James O’Connor pleaded guilty to SIM swap attacks that resulted in $794,000 in cryptocurrency theft
– T-Mobile warned customers in 2021 about SIM swap attacks targeting their accounts
– Hackers exploited a Google Fi data breach in 2023 to conduct SIM swaps
– Criminal groups like Scattered Spider have used SIM swaps to infiltrate corporate networks
The threat extends beyond external hackers. In recent cases, Verizon and T-Mobile employees received texts offering $300 bribes to perform unauthorized SIM swaps.
## Industry Response
AT&T’s launch comes significantly later than competitors—Verizon has offered similar protection for nearly five years. The Federal Communications Commission responded to the growing threat in 2023 by adopting new rules requiring stricter identity verification during SIM swaps and number transfers.
The introduction of Wireless Lock represents an important step in mobile security, though AT&T’s delayed implementation highlights the ongoing challenge of staying ahead of evolving cyber threats in the telecommunications industry.