PUK code unlock: Nokia Lumia 521

Learn how to PUK unlock the Nokia Lumia 521. If you enter a PIN code incorrectly several times in a row, the device blocks you from attempting again and may also permanently damage your SIM card.




Identifying PUK code error messages

Confirm customers are receiving one of the following or similar error messages on their devices.

  • "PIN code blocked. Enter PUK code."
  • "Enter PUK code"
  • "SIM card locked. Emergency calls only. Please contact Customer Care."


Entering PUK codes

  1. Enter the PUK code.
  2. Tap Enter.
  3. Enter a PIN code of your choice.
  4. Tap Enter.
  5. Enter the PIN code again.
  6. Tap Enter.