Nokia X7-00 hard reset
Restore original settings
If your phone is not working properly, you can reset some settings to their original values.
1 End all active calls and connections.
2 Select Menu > Settings and Phone > Phone management > Factory settings > Restore.
3 If prompted, enter the security code.
This does not affect documents or files stored on your phone.
After restoring the original settings, the phone switches off, and then on again. This may take longer than usual.
If your phone has frozen, then hold down the power button for 8 seconds. This should turn the phone off. Try turning it on normally again to see if that solves the problem you are having. If not, then to hard reset it, hold down the Volume down + Camera key + Menu key. Then while holding them down, hold the Power button. The phone will then shake to indicate it's rebooting.
If it is not working try this code:
You can format your device by typing *#7370# in standby mode. Before the device is reset, you need to provide the lock code. The default lock code is 12345.
Formatting the device will permanently erase all user data and settings as well as add-on applications and operator specific settings.