@amabile288
all i can say is that the 1st one got a yellow tinit and not the other two i just got , the first one had the grey LCD panel in a pitch black room when brightness was set from 0 to 99%/// cos at 100% brightness the screen was always black and i couldnt see it in the dark at all ...
so to me it have always been a software bug but related to some panels manufacturers...
on the new 2 iphone 12 pro max i got , they were on the latest IOS 14.3 and the issue is quite hard to reproduce, in fact and to be precise , bth behave the same , If broghtness when in pitch back room and looking to the black FALD HDR vieo or ain photos apps to a pure black picture , from brightness 1% to 100% perfect black no matter what ... but the weird thing is that at the minimum brightness i see a little bit of grey on both screen but it is totally acceptable cos u really need to look for it and i'm quite sure now it is software as apple said in an internal memo... i'm sure all of this will be fixed in the next betas... like they did on iphone 11... who had the same issue in summer.....
i'm currently restoring both phones from my imac pro but it will take some time , and it will eb interesting cos my backups were on 14.4 public beta , so i will see if something changed....
i'll kep you posted.
i'm gonna install windows and get their panels manufacturer... the weird thing is that the iphone i got day one start with F2, and both of the new ones too...