I have just ordered an unlocked Samsung Galaxy S4 Active SGH-I537 that I am going to have activated with MetroPCS. From the model number, this apparently was an AT&T phone. I have found rooting instructions that I don't completely understand yet. My question is, if this is flashed to MetroPCS, would I still use the instructions for an AT&T phone? If so, are there any accurate instructions that you can tell me about? A video would be perfect. Also, would I want to turn off automatic software updates? Sorry if these are stupid questions, but I am trying to learn.