Best Buy offers the Microsoft Lumia 640 4G LTE No-Contract Windows Phone 8 for AT&T GoPhone for $29.99. (Walmart charges the same via pick-up, however stock is limited.) Opt for in-store pickup to avoid the $5.49 shipping charge. That's tied with last month's mention and the lowest total price we've seen. (It's a current best by $20.) It features a 5" 1280x720 IPS touchscreen LCD, Qualcomm MSM8926 Snapdragon 400 1.2GHz quad-core processor, 1GB RAM, 8GB internal memory, front and rear cameras, 1080p video capture, Bluetooth 4.0, 4G LTE, 802.11n wireless, microSDXC card slot, and Windows Phone 8.1 OS with Lumia Denim.