My daughter has a nokia 925 and has forgotten her unlock code. Everytime I enter it it says try in so many minutes and doubles each time. I have contacted my service provider who said it should after 10 attempts ask me for a puk code and reset pin which t
Steps to hard reset your phone:
1. Switch off your phone.
2. Next press and hold together Power button + Volume down
3. Release Buttons when device will vibrate.
4. When you will see exclamation mark press this sequence of keys: Volume Up -> Volume Down -> Power button -> Volume Down
5. Device should now restart.
6. Done, you can now use properly your device. source