There's no doubt the Microsoft Lumia 640 is a pretty popular smartphone. Now you can get the 640 or the 640 XL at a permanent discount at Expansys USA. Starting at $179.99 for the 640 and $199.99 for the 640 XL with both unlocked, these phones are great mid-range handsets for a really low price.
The Lumia 640 features a 5-inch 1280 by 720 display, a Qualcomm Snapdragon 400 processor, 8 GB storage, 1 GB RAM, 0.9 MP front and 8 MP back cameras, and a battery that gets about 21 hours of talk time. The Lumia 640 XL has mostly the same specs, but has a 5.7-inch display, 5MP front and 13 megapixel rear cameras, and slightly longer battery life.