If you ever come to a point when you need to hard format your phone ormaybe upgrade to a new firmware, I'm sure definately would like to save the current settings of your phone. So this is what you should do;
How to backup phone settings to MMC:
Menu>Extras>Memory>Options>Backup phone mem.
Once the formatting or upgrading is done, you canthen restore back the settings by doing;
Restoring settings after phone format.
Menu>Extras>Memory>Options>Restore from card.