The Nokia Lumia 521 is a white smartphone with a 4-inch touch screen and a dual-core processor. It has 512 MB of RAM and 8 GB of storage capacity, expandable with a microSD card. The phone has a 5.0 MP camera and runs on Windows Mobile operating system. Uses Windows phone OS, which is no longer supported but phone still functions normally, gps and included apps still useable. It is network locked to T-Mobile and has quad-band connectivity, Bluetooth, Wi-Fi, GPS, and 3G capabilities. The bundle includes a standard Li-Ion battery and USB charging cable. Used very good condition.