I have iPhone 6. When I update to IOS 9.1, I can't activate FaceTime and iMessage. I reset network settings and now I can't connect home wireless network. When I listen iTunes Radio, battery end faster and warming I'm not happy!
It'll re-nag everyone about the newer 9.x version each time it's released. That's probably why. I'm staying on iOS 8 now because it works, and I have no idea what iOS 9 is supposed to have that I need.