Hi, had my desire for 4 days and its been great so far. However I've just noticed a weird looking mark on the screen. I can't wipe it off and its only really noticeable when the phone screen is blank, but its really annoying to have something like this after only 4 days. The phone has barely been out the house as well. Heres a pic, had to breath on the screen to make it show up better: Should I be phoning my provider (three mobile) to get a replacement? I have no idea whats caused this, looks like it might even be under the screen but I can't tell. I can still use the phone fine and it looks ok when its on or under a dark background, but I don't know if its a serious problem with the screen and wouldn't want it to get worse. Any advice would be helpful.