How hard is it to get your iPhone replaced? My iPhone has been tweaking out and slowing down, losing service, crashing apps all the time. I've restored twice and I'm now restoring a third time. On top of this, my home button and power button occasionally work AND the vibrate goes in and out depending on the day. Will the Genius believe me if these don't present themselves on the day of my visit? Or will he just mark my serial down and forget me?