I used this mobile for almost 4 months and I found it best in all aspects. It has 5.15 inches full hd display, having 428ppi pixel density also having Corning gorilla glass 4 protection on the screen. It comes with android marshmallow v 6.0 having Chipset of Qualcomm MSM8996 Snapdragon 820 CPU and GPU Adreno 530 and having 3GB or RAM and 32GB of internal storage, also it has 16mp face detection auto focus rear camera with OIS technology and rear camera 4mp both are performs very good in daylight as well a slow light conditions.
It also had dual tone led flash light which also enables rear camera to take great pictures in night. It has infrared port so that you can control your electronic devices with your mobile phone as a remote control. It also contains NFC and having USB type C port. It also have fingerprint, gyroscope, proximity, compass and barometer sensor. Also 3000mAh of battery which supports quick charging 3.0. In my opinion this is must buy mobile from xiaomi.