Walmart offers the Nokia Lumia 520 4G 8GB Windows Prepaid Smartphone for AT&T GoPhone for $49.98. (Amazon charges the same.) Opt for free Site-to-Store pickup to avoid the $4.97 shipping fee. That's the lowest total price we could find by $7, although it was $5 two weeks ago. It features a 4" 800x480 IPS touchscreen LCD, Qualcomm Snapdragon 1GHz dual-core processor, 512MB RAM, 8GB internal memory, 5-megapixel rear camera, microSD, micro USB, Bluetooth 4.0, and Windows Phone 8 OS.