The Lumia 820 was Nokia`s mid-range Windows 8 handset .I use it almost one year its really nice and friendly.The Lumia 820 differs significantly from the 920 in terms of design.
It has small amount of built in storage.The screen size is better then small phones its not so smaller then average.
The Snapdragon S4 chipset and 1.5GHz dual-core processor make my apps much smarted and faster.The pictures aren’t as processed so appear sharper, It’s by no means its a bad camera.It also had better battery life I use it almost 14 hours then charged it.If u r looking for window phone too go for it its best in mid rang.