I have to say I am very unhappy with the quality of UK iPhone screens! I have a US iPhone that has a perfect screen - its colours look clear and bright and there is no negative black issue at all. On the other hand my UK iPhone is terrible... it has a negative black issue and over 5 dead/stuck pixels! This is my SECOND UK iPhone - I returned the first that had 2 dead pixels and now I wish I had kept it as it was much better than the new one I got today! You will also see all UK iPhones seem to have a yellow tint to the screen which I do not have on my US iPhone. I now have to return my iPhone AGAIN tomorrow and quite frankly I am embaressed to go back into O2 again! Apple need to sort it out immediately!