I'm having terrible luck with iPhone 5's. As I mentioned in a previous thread, my first one was replaced after 15 months because the wifi antenna was failing. Now I got this replacement yesterday, and the screen has a very visible digitizer grid under moderate light, especially when the screen is off. It looks like a prototype device. Has anyone had this issue before? I think I should take it in and have the screen swapped. I don't want them to replace the whole iPhone again because I'm worried about the "iPhone lottery" and getting a replacement with even more issues, at least if the screen is the one issue on this one it could just be replaced. I wish I could take a photo of it but my iPhone is my only camera.