Try this: Fill up the screen with solid black. You can use the screen test menu (*#0*#) if you can't be bothered to find a totally black image. Make sure the whole screen is black, with not even the notification bar showing. Then go into a totally pitch dark room. Look at the screen for about 30 seconds, to give your eyes time to adjust. If your phone is anything like the 3 models I looked at today, the screen won't be totally black, but will have patches, blotches and lines of darker black areas. My friend noticed this and when I first checked my phone I didn't see anything as the room was not dark enough and I didn't give my eyes time to adjust. However, at work we went into a dark room (eyebrows in the office did raise) and he showed me the "problem". My other workmate who also has a Galaxy S2 looked at his handset with us under the same conditions and, you guessed it, same black blotches - albeit not in exactly the same places. It doesn't affect me and I would never have noticed unless my friend had pointed it out, but it is quite amazing that this slipped through R&D. I would imagine that if I watched a dark film in a dark room, I might notice. SO that is three Galaxy S2 phones, all bought weeks / months apart from different retailers and, in my case, in another part of the country. But yet all have the same flaw. I know one other person that has this phone and I am going to try and check theres, but I think this effects all Galaxy S2 phones. Like I said, you will only see this in a totally dark room, so don't simply glance at your screen and claim it is fine. Find a pitch dark room, totally black screen and look for at least 30 seconds with the brightness on medium to high.