The Lumia 640 is a pretty good handset, and will be one of the first handsets to be upgraded to Windows 10 Mobile.
It features a large HD screen and great 8 megapixel camera, and runs the powerful SnapDragon 400 processor.
If you are looking for a high quality device, for work, play or gifting, the Microsoft Store currently has a great deal on the handset, offering the AT&T version of the device for only $39.00 commitment-free.
The handset is of course locked to the carrier, but is otherwise unencumbered.
Grab the deal while it lasts at the Microsoft Store here.