Lisa Gade reviews the Nokia Lumia 900 Windows Phone on AT&T. Check out Lisa's full review at: http://www.mobiletechreview.com/phone... The Lumia 900 is a high end Windows Phone 7.5 Mango smartphone on AT&T that sells fro just $99 on contract. It has a 4.3" ClearBlack AMOLED display, 16GB storage, an 8 megapixel rear camera with Carl Zeiss lens, a front video chat camera, FM Radio, WiFi, Bluetooth and a GPS. It runs on a 1.4GHz Qualcomm Snapdragon CPU.