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Should I root my friend's myTouch?
I'm a seasoned rooter, having rooted my Droid and Galaxy Nexus. A friend of mine wants to tether, without paying T-Mobile, so he asked me to root.
I have a couple concerns, first is that I think I need to downgrade the phone, I never had to do this before:
Dumb question, but if I downrev the phone, root it, can I then re-install the latest 2.3.4 ROM? If not, I'll go to Cyanogenmod.
Is it easy to unroot? My friend is concerned about warranty, so I'd like to be able to undo this at some point.