Best thing about htc desire 820 dual sim is that it is attractive, light weight, slim, large screen of 5.5 inches, gorilla glass protection. But I am very disappointed with its camera, as it has a 13 megapixel primary camera and 8 megapixel secondary camera but the picture quality seems not good, battery is quite good, it has 2 GB ram(snapdragon 615) but the phone hangs sometime and when you will check for software update it will always show that you that there is no update available on your phone.