hi When I received the iPhone 7 two weeks ago, it was noticeably warmer and more yellow compared to my 6s. I no longer have the 6s and feel my eyes got used to the 7 - I even felt like it became whiter over time. Today I Opened a new 7 and compared my 7 side by side. The new 7 looks yellow and the original 7 looks ice cool !!! What is going on?