How to format the phone memory nokia n72

hie dear,
to format ur phone
press *#7780# then the phone code (by default it is 12345)
this format will restore ur old settings

also use
*#7370# and the phone code (by default it is 12345)
it will format ur total phone memory, remember, all ur data such as contacts and msgs saved in ur phone memory will be deleted.

bunty