Recently the Popular Redmi Note 4 has received MIUI 9.0.5 . Which changes the overall user experience of the device. It also makes the device superfluid.
The Update is 52 MB in size. This update has the following components:-
1. MIUI 9.0.5
2. November Android Security Patch (5 November 2017)
3. Has some performance improvements under the hood.
To update your device go to Settings -> About Phone -> System Updates

Now hoping that Xiaomi would also release the latest Android Oreo for the Redmi Note 4.