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Apple iOS 12 has anti-theft and may affect how you are able to master reset your device. Check the software version in Software versions & updates. To use anti-theft, follow these steps:


  1. On the Home screen, tap Settings.
  2. Tap your Apple ID at the top of the list.
  3. Tap on your device from the list at the bottom.
  4. If prompted, enter you Apple ID password.
  5. Tap Find My iPhone.
  6. Tap the slider next to Find My iPhone to disable.
  7. Enter you Apple ID password and tap Turn Off.

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