I don't think its an issue to be honest. Some people prefer the White balance to lean towards the Blue side, some the yellow side. You can't please everyone and like Sunking101 above, I find the colour temperature of the screen changes with ambient light anyway. It's never consistent.
Here's my iPhone 6S Plus. Left side was taken under fluorescent lighting, the right incandescent lighting. Same phone, same App. Very Blue colder white balance on the left. Much warmer on the right.
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Please stop with this. You have already posted this picture pages ago.
It is well known that some screens have different colors, your picture shows your own experience under two different lights in extreme situations, and does not mean that the screens are always the same and we see them under different light conditions. thank you.