From HowardForums Wiki
Backing Up Your V3
Prior to doing anything to your phone, please make sure that you back up your V3 Razr using Flash Backup or a similar application. There are several circumstances (such as power loss to your computer during a flash) that could render your phone useless and turn your phone into a brick. This site, or authors on this site, cannot be held liable for anything that might happen to your phone... save yourself in advance and back up your phone!
Source(s): Back up phone Features support