I had an issue when updating my iPhone 6 Plus to iOS9. When the beta was released a while back, I download it and--to my dismay--it caused my iPhone to crash every time it went to sleep while it was not charging or connected to my computer. Every time my phone would go to sleep, and when I tried to wake it up again, it was unresponsive (on the black screen). I had to reset the iPhone in order for it to work again. I thought it was just a beta issue, so I downgraded and waited for the final release. When iOS9 came out, I discovered I had the same exact issue. I luckily was able to downgrade back to iOS 8. I'm currently running iOS 8.4 (or whatever the last release of iOS 8 was), and I am afraid to upgrade to iOS 9.1. When I contacted Apple about the issue, they acted like they had no idea what the issue was. Has anyone else had this issue? Has anyone found a resolution?