What is a SIM swap attack?

A SIM swap is when an attacker moves your mobile number to a SIM they control, often by tricking your mobile provider.

How do I stop SIM swap attacks?

Ask your mobile provider for an account PIN or port-out lock, secure your mobile account, and avoid SMS for important MFA where possible.

What should I do if my phone loses signal suddenly?

Contact your mobile provider immediately from another phone and check important accounts for password reset activity.

SIM Swap Protection Guide | Stop Phone Number Account Takeovers

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Phone number attacks

SIM swaps are account takeovers through your mobile number

A SIM swap happens when a criminal convinces your mobile provider to move your number to their SIM. They can then receive SMS codes and reset accounts tied to your phone number.

Protect your mobile account

Ask your provider for an account PIN or port-out lock.
Use a strong password on your mobile account.
Remove public hints like birth date from social profiles.
Watch for sudden loss of mobile signal.

Reduce damage

Move important accounts away from SMS where possible. Use an authenticator app, passkeys, or security keys for email, banking, PayPal, social media, and crypto.

If your phone suddenly says No Service and you did not change SIM or provider, contact your mobile provider immediately from another phone.