In 2025, phone numbers are essential for online services, but they're vulnerable to SIM swapping attacks. Hackers exploit cell carrier security weaknesses, impersonating customers to transfer numbers. The primary sign of a SIM swap attack is loss of cell service for seemingly no reason.
To combat these attacks, major US carriers like AT&T, T-Mobile, and Verizon have introduced security features:
- AT&T: Offers Wireless Account Lock to prevent SIM swaps.
- T-Mobile: Allows customers to block unauthorized number port outs.
- Verizon: Provides SIM Protection and Number Lock to prevent SIM swaps and phone number transfers.
Customers should check their carrier accounts to enable these security features, which are often not enabled by default.