I have posted about various yellowing and noise from my iPhone. Today I noticed a reoccuring problem with my brightness. My iPhone 7 Plus is a tint yellow and has this brightness problem pictured bellow with similar settings to an iPhone 6 (auto-brightness is on for the 6, but it hasn't seemed to matter. The brightness seems to be stuck at a low setting even with auto brightness off and full brightness setting on the 7+. Look at the difference. The 6 isn't even at full brightness. I did a hard reset on the 7 Plus, but it's the exact same.