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Depending on the default settings of the mobile network operator, a PIN for the SIM card is requested before unlocking the SIM card and the corresponding services on the Android smartphone.

The default PIN can be changed at any time to avoid forgetting it.

Android 12
Step 1: Tap on  Settings
Step 2: Tap on  Security
Step 3: Tap on  SIM card lock
Step 4: Tap on  Change SIM PIN
Step 5: Enter the  Old SIM PIN  and follow the instructions on screen
  1. Tap on Settings
  2. Tap on Security
  3. Tap on SIM card lock
  4. Tap on Change SIM PIN
  5. Enter the Old SIM PIN and follow the instructions on screen
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Android Instructions
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