In one sentence: SIM swapping is when a criminal tricks or pays your phone company to move your phone number to a SIM or eSIM that the criminal controls.
Why it matters: Your calls and texts, including text codes, would then go to the criminal. You can lower the risk. Ask your phone company about account security options, such as a PIN, password or number lock.
One thing to do: Log in to your phone company account and look for security options, such as a PIN, password or number lock. Turn on any it offers.
Related terms: SMS code, account takeover, social engineering
Learn more: SIM Swapping: What It Is and How to Protect Your Phone Number
Checked: 25 Oct 2026. Settings screens change. If yours looks different, search the company's help page.
