This replacement for the Lumia 635 has numerous upgrades, including a larger 5-inch HD display, larger battery, 8-megapixel camera, front camera, and NFC. Other features of this affordable Windows ...

The Lumia 640 runs Windows Phone 8.1 with the Lumia Denim update installed. In other words, it has the most up-to-date version of the operating system available. (Microsoft has said the 640 can be ...