method to format Nokia 5th edition (touch-screen) phones. All Symbian S60 phones (2nd, 3rd and 5th edition phones like Nokia 5800XpressMusic, 5530XpressMusic, 5230, 5233, C6, X6, N97 etc and Symbian^3 phones) can be formatted by the so called formatting codes (*#7370# or *#7780#) .
If however the phone is not in a state to enter the codes (Not starting-up or white screen) then follow the steps described below to hard reset it:
1. Hard Reset (Three-key combo) method for Nokia 5800XM/5530XM/5230/5233/5235/C6/X6 – Switch-off the phone (Remove the battery and re-insert it, if necessary). Now Press and HOLD the GREEN (Call) key, RED (Call end) key and the Camera-capture key SIMULTANEOUSLY. While still pressing the above three keys press the power On/Off key. Continue pressing all the three keys until phone boots up and shows the formatting screen.
2. Nokia N97 and N97 mini – Press and HOLD the LEFT SHIFT key, SPACEBAR key and the BACK key simultaneously. While still holding the above three keys, press power-on button, hold them until the phone boots-up.
NOTE however that the format will erase all the data in phone memory and you will also lose your free music that came with the phone. Also make sure to fully charge the phone’s battery before the format process.