The LCD screen on the iPhone 3GS is far from perfect, but it’s also significantly better than the much-touted AM-OLED display on the Google Nexus One. The analysts says that the Nexus One does have a eye catching display, but it has also a lot of noise and artifacts and it just isn´t accurate.
The Nexus One’s 800×480 OLED display offers a higher resolution and pixel density than the iPhone’s 480×320 LCD. Samsung mobile display (manufacturer of this OLED) utilizes a PenTile pixel arrangement, however, which is claimed to lack the sharpness of a 800×480 LCD equivalent.
Most high-quality displays, including the iPhone, have at least 18-bit color, and emulate 24-bit color with dithering. But in his tests, Soneira found that the Nexus One screen uses only 16-bit color, which allows 32 possible intensity levels for red and blue, and 64 for green. Also the factory Calibration and quality control is Very Poor says displaymate.