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SIM Swap Attack Guide

Direct answer

If your line suddenly stops working and account recovery codes appear unexpectedly, contact your carrier through a known official number and secure email and banking accounts.

Last checked · See sources ↗

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01

Contain the risk

  • Check whether the outage affects others.
  • Look for unexpected carrier change or port notices.
  • Use another trusted connection to inspect account activity.
02

Secure and recover

  • Ask the carrier to freeze or recover the line and account.
  • Change primary email and financial account passwords.
  • Replace SMS-based recovery with stronger methods where available.
03

What to verify

  • Do not rely on SMS to recover accounts until the line is secured.

Sources & verification

Last checked: . Official guidance is the primary source. Steps can differ by model, carrier and software version.

  1. SIM swap scams: how to protect yourself ↗US Federal Trade Commission · 2026-09-26 · PH2-FTC-SIM

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