Walmart offers the Microsoft Lumia 435 No-Contract Prepaid 4G Windows Smartphone for T-Mobile in White for $49.88. (Fry's and Best Buy charge the same.) Choose in-store pickup to dodge a $4.97 shipping fee; you can also pad your order over $50 for free shipping. That's the lowest price we could find by $20. It features a 4" 800x480 touchscreen LCD, Qualcomm Snapdragon 200 1.2GHz dual-core processor, 8GB internal memory, Bluetooth 4.0, GPS, and Windows 8.1 with Lumia Denim OS.