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Learn how to lock and unlock the SIM PIN on an iPhone running Apple iOS 15. 

 

Change SIM PIN

  1. From the Home screen, tap Settings > Cellular > SIM PIN.
  2. Tap SIM PIN slider to ON (if necessary).
  3. Tap Change PIN.
  4. Enter current PIN (default is 1234).
  5. Enter new PIN.
  6. Enter new PIN again to confirm.
  7. Tap Save.

 

Turn on / off SIM PIN

The SIM PIN code can protect your SIM from being used in other devices. When you turn on the SIM PIN lock, the device prompts you to enter the code after turning it on.

  1. From the Home screen, tap Settings > Cellular > SIM PIN.
  2. Tap SIM PIN slider to ON or OFF.
  3. Enter current PIN (default is 1234), then tap Done.

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