Proximity sensor faulty

[mikenotty]

The proximity sensor on my s21 ultra doesn't like my lights at night when I'm at home, the display flickers from dim to About 50%, is there a way of fixing this other than sending it back to Samsung?

[RXM]

It sounds like it would be the ambient light sensor causing that instead of the proximity sensor. Tbh every phone I've had I turned it off as I've heard it uses more battery that it saves. It's also not something I ever use on any of my Samsung phones or other smartphones I've had because it can change so often as you said, its just a distraction.

[RXM]

If you search for adaptive brightness in settings in the display category you should find it there.