iOS 9 destroyed my iPhone 5s!
For five weeks I have been doing the same thing over and over again:
1. clean install of iOS 9.1 (without backup)
2. Everything works absolutely perfect for about 5 to 6 days.
3. Then someday it crashes with a bluescreen and starts again.
4. After that first crash I can use it again for a few hours. But then the bluescreens come more often till the iPhone goes into an boot loop. The hardware reset doesn't help - it just goes back into the boot loop.
5. Bringing the iPhone into DFU-MODE and restoring it. During that it will crash many many times also with a blue screen, iTunes shows Error 9 (this week it took about 20 attemps till I could restore it - sometimes it shows the "hello"-screen and crashes with a bluescreen right after that!!).
6. Last week I installed the iOS 9.2 beta 4 and used it without any additional app (just the original apple-apps that are pre-installed). But yesterday the bluescreens returned. So the bluescreens are definitely not caused by an app! I sent a Feedback report to apple when the first bluescreens happend. Hope they will take about what I wrote!
Till iOS 8.4.1 everything worked perfect!!! I never did a Jailbrake and also the hardware is still original!!