The Lumia 900 is Nokia's third Windows Mobile phone, and this one is exclusive to AT&T. It sports a 4.3" ClearBlack AMOLED display (800x480, non PenTile), LTE, 512MB RAM, 8mp camera with a 28mm f/2.2 Carl Zeiss lens and dual-LED flash and a 1.4Ghz CPU.
The Lumia 900 is now shipping for AT&T ($50 with a contract).
OLED type:
4.3" ClearBlack AMOLED (800x480)