Review: Microsoft Lumia 640 LTE

Introduction and designThe Microsoft Lumia 640 is among the first in a new breed of Windows Phones. With a larger screen, more RAM and a different design language from its predecessor, this is Microsoft stamping its logo (literally) on the Lumia range. And what a change this proves to be.The old Nokia did things a little differently. Budget devices made by the Finnish firm were notoriously bare-bones; this could be seen in the decision to omit Gorilla Glass and limit RAM in models such as the Lu