For in-store pickup only and with stock varying by ZIP code, Walmart offers the Microsoft Lumia 640 4G LTE No-Contract Windows Phone 8 for AT&T GoPhone for $29.99. (Best Buy charges the same with in-store pickup, Amazon charges the same with free shipping for Prime members, and AT&T Wireless charges the same with free shipping.) That's $4 below our mention from four days ago, $30 off, and tied as the lowest price we've seen for this phone. 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.