T-Mobile is the only carrier in US that is carrying the low cost Windows Phone 8 device Lumia 521. The device is available for just $149 without any contract and for that price it offers tons of value. The Lumia 521 runs on a 1GHz Snapdragon S4 processor, 512MB of RAM with 8GB of storage and 4? IPS display with a 480 x 800 pixel resolution. T-Mobile is now offering a $50 refill card to fund your account as a limited time offer included with the device. Check the T-Mobile product page in the link below.