You know how helpful it would be for users to be able to calibrate the screen color/contrast/temperature? I mean, Apple could even put it way back hidden deep inside Settings as an advanced option for advanced users. We can calibrate our desktop monitors with ease... why not our mobile display? Some people like blue screens, some people like yellow, some people like sharp contrast, and some people like low contrast. It just makes so much sense to me for them to add a color profiler to the iPhone. Let's say an average user is unhappy with their screen temperature or color.... if they didn't know about the advanced settings, they could bring it to the Apple Genius Bar and the genius could fix it for them. There seems to be a HUGE inconsistency between each iPhone screen. I wish there was some sort of hidden button combination that puts the iPhone in a service mode where you can fine tune the screen to *your liking* Just an idea.