Do note that this will only work with 5800 with V.20.0.012
- With your 5800 turned off,
- Press and hold [Green] + [Red] + [Camera] Keys (that's the Green Call Button and the Red End Button respectively)
- Turn phone ON, and keep pressing it until you see the Nokia Shaking Hands Logo.
Of course the Default code is still 12345.
Do this if your device is not turning on properly and you do not have quick access to the nearest Nokia Care Point.