I don't know why but I have been deathly afraid to root... normally I am all about doing it.. what happens if you brick the phone? Just walk in to a mPCS and they exchange it on the spot or what?[/QUOT
If for some reason you brick your phone either bootloop are completely won't power up at all, just bring it to Metro an just play stupid. They can't even tell if it is rooted anyways if it won't turn on.

They will just get you a replacement for $10 online and you have to wait a few days, or $30 if they have them in stock over the counter. Only go that route if its your last resort if the problem isn't fixable here! Hope this helps