Looking Into The Lumia 640 For starters, we loved the viewing angles of the screen as well as the clarity of pictures we took with the Lumia 640, but again, the OS was a letdown in the age when we are so happy with Android. Surprisingly, the biggest snag came about when we realized that the phone can barely support very basic apps due to the lowdown of the Windows 8.1 system. A Deeper Look Only 8.8 mm in terms of thickness, the Lumia 640 is an easy deal to carry in your pockets but we expected more speed that are missing due to an average quad-core 1.2GHz Qualcomm Snapdragon 400. Even the 1GB RAM size is a low point of the Lumia handset though the phone tiles on home screen work just about fine. As for the contracted pricing, pay as little as £14 per month to avail Office 365 Personal for one year as well as most Microsoft applications toped up with One Drive. Still want to buy the Lumia 640? Wait for sometime before you do! Read More: Lumia 940 XL Leaked Details Hints At New Action Centre And Revamped Apps Samsung Galaxy S6 Active To Be Backed With 10,000 mAh Battery ?