So when I compare my iPhone XS with my 2 other older iPhones (6 and 6+) there is a tremendous difference. Both 2 older iPhones have had screen replacements with third party screens, so they both have a different hue on the white color compared to an original Apple screen, as is common on third party screens, but I guess that should have nothing to do with the screen brightness? Unfortunately I don't have access to another iPhone with an original screen, maybe I should visit a store and compare. The screens are much brighter on the two older iPhones, I measured with a lux meter (I don't think the meter is particularly accurate though) and it showed like a 50% difference between the XS and the two other iPhones. I notice the problem when i´m outside in a sunny environment, then I have a bit hard time reading the XS screen even on max brightness. Anyway, is the XS generally less bright than the older iPhones, or can the third party screens alter the brightness by doing the screens brighter? Any solutions to this problem, one would think that if something was faulty it should stop working all together?