I have switched to the SII after a couple years with the iPhone, due to wanting a larger screen. I'm a former digital imaging professional & publisher. I too am extremely dissapointed with the S2 screen and its yellowish/greenish tint, over saturation, and over contrast. I've spoken with Samsung about this problem. A couple days ago, I discovered an app called Screen Adjustor. It has color, brightness, and contrast controls. No saturation control at this time. I have set the contrast at -35, the blue at 20%; and the brightness at 35%. And set the auto startup function. The app is great and now I can enjoy looking at pictures on websites & other sources on the phone. This app is the one thing which has saved this phone for me. Its in the Android market.