Do you feel your Nokia N97 phone isn’t working properly or not responding quickly? Are you having weird problems that you didn’t have when you first got your Nokia phone? You can try soft reset of your Nokia and hope for the best. Still it is not resolving, go for hard reset, but you may lose all your data from the phone.
Soft Reset will clear pending errors and bring your mobile to an initial state by restoring Factory setting. To operate this function on your mobile, the shortcut is: *#7380#. This function apparently works on almost all Nokia mobile phones.
Hard reset Reset a Nokia N97: If your Nokia n97 freezes at startup, and the Nokia logo is displayed, you can reset your N97 while pressing the 4 buttons describe above:
Delete key (left arrow logo)
Caps /shift button (up arrow logo)
The Nokia logo appears and then after a few moments you will be asked to configure your phone.