The Lumia 640 and 640 XL are worthy update to the 635 and 1320, but they leaving us aching for a new flagship from Microsoft. T-Mobile recently added the Microsoft Lumia 640 to its web site and ...

Detailed features and specs for the Microsoft Lumia 640 XL for AT&T. Plus discussion forum and photos This big brother to the 640 sports a larger 5.7-inch display, larger battery, and 13-megapixel ...