Go to Tools > Settings > Phone > General > Orig. phone settings. After resetting, the phone may take a longer time to power on again. Documents and files are unaffected.
To restore the original device settings, you need your device lock code. The default value of the lock code is 12345.
Applies for Nokia E50-1, N93, N80, N71, N70, E70, E65, E61i, E61, E60, N90 devices.