Your mobile number can be a recovery key for email, banking and social accounts. Protect it with operator controls and stronger authentication.
Add operator protections
Use account PIN and port-out controls where available.
Protect email first
Email often controls other account recovery.
Use stronger authentication
Prefer authenticator apps, passkeys or security keys where supported.
Watch for service loss
Unexpected loss of signal can indicate account changes.
Limit exposed personal data
Attackers may use public information to impersonate you.
Keep recovery options current
Make sure alternate email and trusted devices are secure.
Frequently asked questions
Why is my phone number valuable to attackers?
It may receive calls, SMS codes and recovery messages.
What is port-out fraud?
Unauthorized transfer of a number to another provider.
Should I add an account PIN?
Yes, if your operator supports it.
Is SMS the strongest 2FA?
Often not; phishing-resistant options may be stronger.
What if my number suddenly stops working?
Contact the operator immediately.