I had my iPhone 4 replaced yesterday and this one has the green spot. My original phone worked perfectly for 3 and a half weeks and then suddenly started going into a coma a couple of times a day. It also did not have the green spot I have now. Is this something that requires a replacement? Is a fix possible with a software update? The iPhone 4 is my first iPhone and the good camera was one of the things I was most excited about. I really don't want to have to just learn to live with it.