I installed the latest iOS last night, and it was a nightmare. I've never had problems with an update before, but this one made up for it. It kept turning on and shutting itself off, over and over. Finally I had an online chat with Apple support. I had to do a complete restore. This morning, I'm trying to backup to iCloud, and I keep getting the same error message. WHY will it not let me backup? I've shut it off and restarted; I've logged into and out of iCloud; nothing seems to work. Can anyone help?