Why the my iPhone 6s iOS 10.1 screen auto lock after watching the movie in you tube

[iMore Question]

I am using iPhone 6s iOS 10.1 when I use iOS after 9.2 my mobile going very hang and some times when I call microphone also not working ,and when some time if any call me my mobile can't accept the call very hang and google map also not showing my current location many problems please tell me the solution I want old iOS version kindly help me thanks with best regard

 

[CrowGirl1990]

I would reset all settings. It may help. You can't go back to iOS 9.2. Best of luck