My newer 6 has been shutting down without my input. Then it takes a very long time or several attempts to get it to reboot.
I had a great deal of trouble with my 1st 6 returning it to the Apple Genius Bar several times with no positive results...Finally they agreed there were too many problems and replaced my phone about 30 days ago. Now I am having this problem. What is wrong with the 6? My 5 was just fine and I never had these problems.