Nokia Lumia 520 is an entry-level Windows Phone 8 smartphone. Nokia Lumia 520 became the best-selling Windows device in the world, selling more untis than any other model of Windows phone. Lumia 520 comes in slate-shape with 4 inch Supersensitive touchscreen. It has 5 MP camera sensor with autofocus and two-stage capture. And also have 8 GB of internal storage with about 3 GB of the storage taken up by the operating system. Also have 1300 mah battery backup. It’s performance is very nice.