I've never owned a smartphone before, so i'm just wondering. When you first get a phone, before you start using it, are you supposed to charge it fully before you start using it for the first time? Are you supposed to drain it completely for the first few times or every so often? And Should you take it off the charger when it's done during everyday use or is it better just to leave it sit there, for example, while i'm sleeping. I just want to maximize my battery from the start, Don't want to screw it up.