Unable format my nokia 6600

[Pratim]

hello friends i am facing a problem in formatting my nokia 6600 i have tried *#7370# to format it but no change.
any help will be appreciate

[Regina]

Hi pratim , try this code *#7780# and format your phone. before applying this code don't forget to backup your important data from your phone(contacts, calendar entries, notes etc ).

[Paxton]

1. Turn your device off.
2. Remove SIM card and MMC card (actually, you do not need to remove these, but after format remember to format memory card and reboot phone).
3. Press and hold 3 keys; Green dial key, * Star key, no. 3 key on keypad Together.
4. Turn your device on while you are pressing the three buttons.
5. You should now see "Formatting .." on the Screen! Leave the buttons now.