This replacement for the Lumia 635 has numerous upgrades ... Other features of this affordable Windows Phone include memory card slot, FM radio, 4G LTE data, and integration with XBox, full ...

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 ...