As one of its daily deals, Best Buy offers the Nokia Lumia 635 No-Contract Windows Phone 8.1 for T-Mobile in White for $49.99 with free shipping. That's tied with our mention from a month ago as the lowest total price we've seen. (It's a current price low by $30.) It features a Qualcomm Snapdragon 400 1.2GHz quad-core processor, 4.5" 854x480 IPS LCD, 512MB RAM, 8GB internal memory, 5-megapixel camera, microSDHC slot, WiFi, Bluetooth, and Microsoft Windows Phone 8.1 OS. Deal ends today.