Finally its official. T-Mobile together with Nokia will launch the new Lumia 710 this January 11th for only US$ 49.99 with 2 new years contract. This is not the first Mango Windows Phone for T-Mobile , also it is the first 4G Windows Phone, HSPA+ capable up to 14.4 Mbps. Apparently the new Nokia Lumia 710 is exclusive to T-Mobile in US. The Lumia 710 features a 3.7-incher, a 800 x 480 ClearBlack LCD display, 1.4GHz Qualcomm Snapdragon processor, 512MB RAM, 8GB of storage, 5 megapixel rear camera, LED flash, WiFi and Bluetooth.