CRYPTO GLOSSARY

SIM swap

An attack in which a criminal convinces your mobile provider to move your number to their SIM card, then receives your login codes.

SIM swap in more detail

In a SIM swap, a criminal convinces your mobile provider to move your number to their SIM card. They may impersonate you, bribe an employee or trick staff. Your phone loses signal, and they receive your calls and texts.

The FBI received 1,611 SIM-swap complaints in 2021, with losses of more than $68 million.

FROM LESSON 36 · 5 MIN READSecuring your accounts: passwords, 2FA, and SIM swapsHow to protect exchange and email accounts with unique passwords, strong two-factor authentication and defences against SIM-swap attacks.Read the lesson

All 128 terms · Checked against the lesson's sources on 8 October 2026.

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