If you have an Android device and have forgotten your SIM card’s PIN, there is a way to erase the card’s memory. This method will not work if the card was inserted after being erased. To erase the SIM card memory on an Android device:

  1. Open the Settings app on your phone.
  2. Under “General,” tap “About phone.”
  3. Tap “Build number” seven times to unlock the Developer Options menu.
  4. Under “Developer options,” tap “Sim card.”
  5. Tap “Erase all data” to confirm your choice and erase all of your data on the SIM card. ..