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When someone hijacks your phone number to get into your accounts.

Definition

SIM swapping is when an attacker tricks a phone carrier into moving your phone number to their SIM card.

In plain English When someone hijacks your phone number to get into your accounts.

Why this matters

Why it matters: If your number is hijacked, the attacker may receive your SMS codes and reset your passwords.

Example

Example: An attacker uses SIM swapping to intercept SMS verification codes for an email account.