The Lumia 640 Hardware Not just that we do not like the plasticy build either, despite it belonging to old-school Nokia ideals. In terms of hardware and longevity alone, the Lumia 640 appears to be a great bargain. At 8.8 mm, this is not Size Zero phone but is surely a good one to carry around easily. The quad-core 1.2GHz Qualcomm Snapdragon 400 that powers it is worth it as if the 1GB RAM size. Wrapping Up Only if you are a real big enthusiast, this set up could appeal to you. The contract comes at £14 on a monthly basis with a yearlong trial for Office 365 Personal. Besides this, the entire array of MS apps and One Drive are available as well. Read More: Breaking—Code Names For Lumia 940 And More Upcoming Microsoft Flagships Revealed Samsung Galaxy S6 Plus Leaked Image Surfaces, May Arrive By August