Microsoft is now selling Lumia 640 XL Unlocked device for just $199 on Microsoft Store in the US. If you are looking for a cheap unlocked device, I think this is a great deal. Lumia 640 XL comes with 5.7-inch HD display, extra-large 3000mAH battery for great battery life and a 13MP main camera supported by wide-angle 5MP front-facing camera.
- 13MP primary camera with LED flash and 5MP front facing camera
- 5.7-inch (14.47 centimeters) IPS LCD multi-touch capacitive touchscreen with 1280 x 720 pixels resolution, 259 ppi pixel density and 16M color support
- Windows Phone v8.1 operating system (Windows 10 Mobile update available) with 1.2GHz Qualcomm Snapdragon 400 quad core processor, 1GB RAM, 8GB internal memory expandable up to 128GB and dual SIM (GSM+WCDMA)
- 3000mAH lithium-ion battery providing talk-time of 31 hours 13 minutes on 2G, 23 hours 42 minutes on 3G networks and standby time of 936 hours