Hard Reset NOKIA 7900 Crystal Prism
- Make sure that device is working.
- First of all open phone's Dialer by pressing Call key.
- Type in code into phone's Dialer: *#7370#
- Confirm by pressing Call key.
- Success! after restart you can use your device.
Remove Lock Code in Nokia Phone - factory reset with forgotten security code
Help! This doesn't work
Hard Reset will erase all of your data
All described operations you are doing at your own risk.