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. Error messages.
You Have to Do a Full cell phone formatting on your s60 v2
STEPS TO FOLLOW
1. Make sure that you have enough charge to perform a full formating.
2. Backup your contacts list and important personal files to MMC memory card.
3. Switch-off your s60 v2 phone.
4. Press and hold 3 keys;
Green dial key, * (star key) no. 3 key and then press the power on/off to swtich on the 6600 phone.
Remember!!! do not let go all of the keys and hold keys until you see a formatting word on a screen
5. After a few minutes when the Full phone formatting completed, your s60 v2 will back to original system and factory settting.
Those are steps that can help you in full formatting of your cell phone
