Screen brightness
I have an iPhone 8 which has been working perfectly well suddenly the screen has gone really dull I can hardly read it. I’ve switched my phone off left for a minute turned back on still the same I’ve gone into display screen is set at light and the brightness slider panel is disabled ? It won’t move. Followed instructions from another user to go into accessibility and zoom but that is disabled also. Can anyone help please?
iPhone 8, iOS 16