I'm coming from a Regular phone so this is like wow. I know a little about this stuff, I know I don't want to Rom the phone, or mess with the inside. Can one of you experts please give me some direction on the MUSTS when you get the phone, what I should and shouldn't do ? And maybe some direction on what Apps I need to make the phone run best. Also the battery, I've heard it's sketchy, should I buy an extended life if so what kind? Thank you so very much.