Hello, I was a bit concern myself about the two type of Iphone4 screen on the market, the yellowish one and blueish one. So I decided today to go to my local Apple store and ask those genius guys. They confirmed me that the iphone and ipad should have a warmer screen . They also said if its too blueish its defective or a glitch. So you guys can calm down about your warmer screen, it work as intended.