Dave
Honorary Master
Funnily enough the only time I've had a problem was a clean install of 9.1 to my Air 2, it was working fine but with horrible battery drain. I've now restored back to 9.0GM and restored my 9.0 backup and it's working perfectly again.
To make it even more confusing 9.1 is giving tremendous battery life on my iPhone 5s (and that was done OTA update), it's almost doubled battery life from 8.4.1.
I still have my iPhone 6 on 9.0GM as I pulled it off the beta track after the battery issues on the Air. I might try it again, but I'm considering selling the 6 so might just leave it on 9.0, not every buyer wants beta firmware.
To make it even more confusing 9.1 is giving tremendous battery life on my iPhone 5s (and that was done OTA update), it's almost doubled battery life from 8.4.1.
I still have my iPhone 6 on 9.0GM as I pulled it off the beta track after the battery issues on the Air. I might try it again, but I'm considering selling the 6 so might just leave it on 9.0, not every buyer wants beta firmware.