It's an odd thing I noticed when I got the 7 Plus when it released, and now I am seeing it with the 7 I just moved to last week. It hasn't happened on every iPhone version I've had, my 4s remained yellow and needed to be swapped, and my 6s screen was perfect out of the box. When my wife got her 6s Plus it had the yellow washed out hue, a few days later....perfect. When I got the 7 Plus on release day, the screen had the yellow washed out hue. It definitely did not appear to be 25% brighter than the 6s I replaced it with. It was a little disappointing. For years I read about giving it a few days for the glue to completely cure. After using it for a few days after that I didn't even think about it even register in my brain that it had dramatically improved. We see tons of threads opened asking about the yellow hue, and rarely see the posts following up that it cleared up. Im looking at my display right now and it is definitely brighter, whiter, and so much better than when I received it Friday. So noticing it now, I figured I would ask those that may notice. Is there an actual break in period for iPhone screens?