I had a rock solid iPhone 4 and with my iPhone 5s with 6.01, all sort of flakey things happen. 1) Out of nowhere the screen dims. ?? 2) Out of nowhere the content on the screen is blown up and won't shrink down. ?? 3) Phone is is ring mode and it only vibrates. ?? and the biggest issue as I'm a fitness instructor and use it for music playback: 4) When playing back a song in iTunes, if I hit pause within the last 5 seconds, then play, it goes to the beginning of the song! Any thoughts out there???