I have never used iPhone but from what I heard, once you do your updates when you're supposed to, the phone will always run perfectly and never give you issues.
I have been making use of Gamestop for as long as I can remember and it's been pretty decent for me when it comes to getting most of the information I needed.
It's just like how you do it in racing games. I mastered control, using the gas and brakes. So, I cue how I do it in games and do the same thing in real life.