I'm trying to unroot my phone so that I can update to 2.1. I "factory reset" but I'm worried about losing my contacts. I've been doing a lot of searching, but I can't find anything that makes me comfortable doing so. Also, I plan on using this method to restore the phone but I must be dump because I can not get RSD to install (it has no file extension when your download it. Any help would be much appreciated.