I recently bought a phone that was rooted secondhand, and I would like to totally remove the root- it seems like it is possible, but not very common. Does anyone have a guide or something? I am new to android, and I do not know which root he had on (but I can ask if it's something I need to know)- the phone is now set to stock 2.2 and reset, but will not upgrade to 2.3 the normal way. I am not really interested in keeping the root on either unless it is the only way. Thanks!