How to hard reset at Nokia N70
Here are two ways to hard reset or format your Nokia N70 mobile phone:
Method 11) Switch off your phone
2) Press and hold these 3 keys together:
-green dial key
-the star key(*)
-the number 3 key
3) Turn the phone on
Do not release the keys until you see a formatting screen and even after the phone has started. Wait until the initial sound starts to play and the hand animation is displayed.
Method 2
on the screen type *#7370#
you will be prompted for a Security Code. This is 12345 if you haven't changed it.
Do ensure that you have backed up your data first onto a PC by using pc suite, or onto a memory card.