The compact 521 4G T-Mobile Pre-Paid Nokia Lumia Smartphone is a Windows Phone that sports a memory card slot, 5MP camera and a front camera. The cell phone also has a removable battery, a 1 GHz processor, and is 4G-capable. This T-Mobile Pre-Paid Smartphone also has the ability to integrate with Xbox, Windows 8 and SkyDrive. This phone is a smart choice to connect, play games or get your daily weather, in addition to talking to friends and family.