Nokia 820 is a windows phone that has the look of a unibody design with the rear frame can be changed. Nokia Lumia 820 comes with a 4.3 inch screen with a resolution of 800x480 pixels and is using a dual-core processor Qualcomm Snapdragon S4 1.5 GHz with 1GB RAM. Internal memory capacity of 8 GB Lumia 820 only, but can be expanded with microSD up to 64 GB. Windows Phone is also supported OS Windows 8 also has support 4G LTE network (Long Term Evolution). In addition, this smartphone also call for support for 3G HSDPA, NFC, WiFi and use a battery with a capacity of 1,650 mAh.