Apple iPhone 4S (iOS5)
Retrieve PUK code and unblock SIM
If an incorrect PIN is entered three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. Find out how to retrieve the PUK.
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1Turn off your phone
- Press and hold On/Off.
- Drag the arrow right to turn off your phone.
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2Turn on your phone
- Press and hold On/Off until your phone is turned on.
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3Unblock SIM
- The display tells you that your SIM is blocked.
- Drag the arrow right.
- Press Unlock.
- Key in your PUK and press OK.
- Key in a new four-digit PIN and press OK.
- Key in the new four-digit PIN again and press OK.
- The phone is ready for use.