Q: Auto-Brightness Not Available in iOS 10
My iPhone 5S somehow had lost the Auto-Brightness ability about one week ago, when I noticed the screen was very dark when in direct sunlight. I looked to see if the Auto-Brightness option was not selected in Settings > Display & Brightness, but it wasn't even listed underneath the Brightness slider.
I decided to wait until iOS 10 was released, because I thought that the new update would solve the issue. Unfortunately, the issue is still exactly the same as before with iOS 10 installed. I do see that this question was asked previously (dont have auto brightness anymore on ios 9.3.4), but I did not want to derail that discussion with a different iOS build. I have already restarted my phone, but no change has occurred. I hope I don't have to backup & restore my phone, especially since that did not resolve the previous inquiry either.
Any help would be greatly appreciated!
iPhone 5s, iOS 10
Posted on Sep 14, 2016 6:52 AM

