Full Symbian Phone Formatting

If you encounter a situation like
below on your symbian phone,
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 such as 'Child
Installer' keeps popping-up.
do a full phone formatting on
your phone 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. (see link below)
3. Switch-off your phone.
4. Press and hold these 3 keys;
Green dial key, * (star key) and
no. 3 key and then press the
power on/off to switch on the
phone.
Remember, do not let go all of
the keys, hold until you see a
formatting word screen show!
5. After a few minutes when the
full phone formatting completed,
your phone will be back to
original system and factory
setttings.
All applications installed will be
lost unless you've made a backup
on your mmc. You can restore
the backup to the C drive again.