is it normal for different phone screens to all have slightly different brightnesses even if they're the same model? for some reason I also feel like my s21 is slightly less bright than it used to be. maybe I'm just being picky now. I returned my first s21 because the screen color looked off and I can see an improvement since I got the replacement. guess that's just the panel lottery? lol I found it interesting cuz the display model of the ultra version in the store actually looked a bit dimmer than mine.