Grey screen at IPhone 5S
Hello Expert
SInce few days there's grey screen appearing at bottom side of iPhon, this started with thin layer and growing by MM In day or so, as of now it's grown up to one inch and showing flashes / blinks at grey screen, often screen is getting hanged by disabling all options in screen.
i Tried options like switch off / on by holding home and power buttons, switching off / on by connecting to computer- iTune.
You may refer to attached pic for more clarity, please help how I can fix this issues
I phone User
iPhone 5s, iOS 9.3.2