T-Mobile's Microsoft Lumia 640 on sale now at Walmart
The Microsoft Lumia 640 comes equipped with a 5-inch, 720 x 1280 resolution screen. That combination produces a pixel density of 294ppi. Under the hood is the Snapdragon 400 SoC, which contains a quad-core 1.2GHz CPU and the Adreno 305 GPU. 1GB of RAM is aboard with 8GB of native storage. For those needing additional memory, there is a 128GB capacity microSD slot available. An 8MP camera adorns the back of the unit while a .9MP front-facing camera is ready to handle selfies. A 2500mAh battery keeps the lights on, and Windows Phone 8.1 is pre-installed.
This particular Walmart had received two Lumia 640 units, both of which sold out quickly. This bodes well for sales of the handset once it is officially launched by T-Mobile.