Preventing SIM card swap fraud requires a combination of carrier-level protections and personal vigilance. First, contact your mobile carrier and request account-level security, such as a PIN or password that must be provided before making changes to your account. Some carriers also offer “port-out protection” or “number lock” features that prevent unauthorized transfers.
Next, avoid using SMS text messages as your only method of two-factor authentication (2FA). Instead, opt for app-based authenticators like Google Authenticator or Authy, or use hardware security keys like YubiKey. These tools are far more resistant to SIM swap attacks because they do not rely on your phone number.
Finally, monitor your phone for sudden service loss or strange notifications. If your phone suddenly stops working, it could be a sign that your number has been hijacked. Acting quickly—by contacting your carrier and securing your accounts—can reduce the financial and personal damage caused by SIM swap identity theft.
