I don’t know why I haven’t seen anyone else with this problem. Even with a sunshade,I have a lot of trouble seeing the screen on my iPhone X. Screen brightness is at maximum with auto brightness turned off. I find that the screen dims down even further during flight, perhaps because phone is heating up (no phone case). Phone has been checked out and has no problems. I am a newbie flyer and have only flown my new MA2 a few times and need some ideas.