When I got my first iphone 5, I was blown away by the screen. It was AMAZING. Colors popped, and everything was sharp, crisp and seemed to jump off the screen. I had to get a replacement due to a scuff on the back, and the replacement just seems duller and not as vibrant. I noticed it right away. Whites looked a little yellow, and something about it was just off. Then I used it today with polarized glasses, and I noticed something interesting right away: (when looking at screen through polarized sunglasses) First phone: In portrait, could view the screen with virtually NO distortion. Looked dim/shadowed when in landscape. No "glowing areas" or hotspots. Replacement phone: In portrait, there is minor dimming on one side. In landscape, there is less dimming than the first phone. It almost seems like Landscape is easier to read with polarized lenses on. Furthermore, there are many "hotspots" that seem to "glow". Could the polarized lenses be pointing out screen quality variation that we can't see with out naked eye, which leads to the decreased vibrancy of the replacement screen?