No i don't think that they will do the backup. I requested that they do it but they only say they will try. In the end it is back to square one. I suggest that u store all yr number in yr sim card and do a backup on yr pc.
i had a friend whose 7650 that unable to on after brought for a few days. she took to the nokia care centre at suntec, they are able to backup everyting for her and upgraded the sofware 3.16 at the same time.