A full backup of the firmware can be done. HERE is a tut on how to to it. follow it and you will have a complete backup of your firmware. the full backup will includes everything, EROM+MAIN+FS+GDFS all the configurations, settings, contacts and msg.
Thank you for the tip. My backup is done.
How and when can I use this backup? Can I take files from for editing?
( yes i'm a newbie)