Have a new X and in all honesty am a little weary in the decision to root, only due to the warranty. I downloaded the Z4 Root app and it asks for a permanent root or temporary root. Is the temp root just for a session (ie to do some wireless tethering) and the permanent is for good (although I have read that the app has an unroot button. Since this was a latest update, did the temp root replace the unroot button? or is the unroot button tehre after you have done a permanent root? Thanks for any insight.