Also known as a subscriber identity module, a SIM card is a small card that contains a chip that identifies and authenticates you as a subscriber to your mobile carrier’s network. This SIM card is required for sending or receiving calls and sending texts.

How can I know if my SIM card was cloned?

A sudden loss of service, alerts from your mobile carrier, and unauthorized account activity are all red flags that you may be the victim of a SIM swap attack. You should contact your carrier immediately to verify SIM activity on your account.

Does my carrier protect against SIM swapping?

Protection features may be limited and often require extra steps to set up. Some carriers offer account PINs to better protect against this type of scam. Other security features a carrier might offer include account alerts and port-out locks.

What is SIM swapping and how to prevent it

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