Hi everyone, I've been having an issue with my headphone jack and finally called into Tmobile tech support. They are going to be sending a replacement phone, so I would like some help on how I can get my current phone ready to be sent back to them. Currently it is rooted stock 2.1 and has ryanza lag fix applied. Most of my files are on the SD. I know I need to unroot, how would I proceed to do that and would unrooting get rid of the lag fix? Thanks in advance.