Get the AT&T branded Nokia Lumia 635 for $39.99 from Radio Shack
The Nokia Lumia 635 features a 4.5-inch screen, offering a resolution of 480 x 854. A quad-core 1.2GHz Snapdragon 400 CPU can be found under the hood with the Adreno 305 GPU crunching graphics. 512MB of RAM is on board along with 8GB of RAM. A 128GB capacity microSD slot adds additional memory for those who need it. The rear-facing 5MP camera is the only snapper on the device, although it does not have a flash, and an 1830 mAh battery keeps the lights on.
Speaking about keeping the lights on, there has been talk about Radio Shack filing for bankruptcy. While such a filing most likely wouldn't affect this deal, you might still want to take advantage of this pricing while you can.
source: RadioShack via dealnews,WMPoweruser