Question about backing up and Un-rooting.

view story

http://forum.xda-developers.com – So I am looking to root but I still a few questions. So if I don't flash roms or anything to revert to stock could i just use the factory reset built in to phones settings app (Razr HD XT925) and would that make it back to a fresh phone with no signs of root? Also if i am going to flash roms and kernels if take a nandroid backup then even if I switch roms or kernels I can restore using the backup to stock rom and then I can just factory reset after i restore from my backup through the factory restore in settings to make it like a brand new phone agian? Last question, say I wanted to g (HowTos)