Nokia Lumia 820 comes with a 4.3 inches AMOLED capacitive touchscreen, 16M colors with a resolution of 480 x 800 pixels (~217 ppi pixel density). This phone offers 8 GB, 1 GB RAM internal storage which can be expanded up to microSD, up to 64 GB. It is a Single SIM smartphone that runs on Microsoft Windows Phone 8, upgradeable to v8.1. The phone offers the 1 GB and it is powered by a Qualcomm MSM8960 Snapdragon S4 Plus with 1 GB.The phone has Li-Ion 1650 mAh battery (BP-5T),Up to 55 h battery. It comes with a 8 MP, Carl Zeiss optics, autofocus, dual-LED flash, primary camera.