I am using this mobile phone for about 6 months and in my case it ise the best smartphone under 12k. XIAOMI has done their work perfectly for this one. It comes with snapdragon 650 CPU which is a octa core processor. It has two variants 2G+ 16G or 3G+ 32G. I am using a 3GB+ 32GB variant and my experience I awesome. This phone is made for normal as well as high useage.
It has its own UI which is known as miui. MIUI user interface is a very user friendly.
In terms of battery it comes with a massive battery of 4100 maH which can easily last for about 2 days of normal useage. In terms of camera it has 16 mega pixels sharp shooter and a 5 mega pixels camera for selfie. The focus of camera is awesome. It also supports 4G so you can use jio sim with it. In this price range it is a best smartphone. It is a value for money device.
In terms of services the XIAOMI gives you a update of a phone in every couple of months. All the bugs and errors in phone are solved in every single upate. This is one of the best smartphone in the present market in this price range. So go for it guys!