Auto brighness toggle is missing after updating the iOS
After updating my iphone from iOS 8 to iOS 9.1 the auto brightness toggle went missing. It is not appearing in Settings-> Display&Brightness or anywhere else in Settings. I have tried DFU Restore, Reset all settings, hard restart and still it is missing. I’ve updated to iOS 9.3 but still no result. With the slider for brightness I can change the brightness and it is working fine.