umm try this....
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Normal Reset *#7780# : Restores ini files from rom but preserves user data (photos, 3rd party apps etc)
Hard Reset *#7370# : This reformats completely the C: drive. All applications and files stored on this drive will be lost and clean default files will be rewritten.
In both case, the phone will ask you a confirmation and you will have to enter a security code (12345 by default).
Files and applications stored on E: drive are not be affected by these sequences.
Full phone formatting
If you encounter situation like below on your 6600 :
1. Blank screen phone unable to reboot.
2. Phone only able to boot-up to "Nokia" word screen.
3. Install some program but not able to uninstall it after that.
4. Unable to delete unwanted files on C drive.
Do a Full phone formatting as steps below :
1. Make sure you have at least 3/4 charge of battery power left.
2. Backup your contacts list and personal files to MMC memory card.
3. Switch-off your 6600 phone and REMOVE UR MMC!.
4. Press and hold 3 keys : Green dial key, * Star key, no. 3 key on keypad and then press the power on/off to swtich on the 6600 phone. Remember, do not let go the 3 press and hold keys until you see a formatting word screen show!
5. After a few minutes when the Full phone formatting completed, your 6600 will back to original system and factory settting
