Learn how to PUK unlock the Nokia Lumia 435. 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
- Enter the PUK code and tap enter.
- Enter a PIN code of your choice and tap enter.
- Re-enter the PIN code and tap enter.