Xiaomi Mi 4 is top-range Android smartphone, developed by Chinese company, Xiaomi Tech, and released in August 2014. The Mi 4 features a Snapdragon 801 quad-core 2.5Ghz processor, 3GB of RAM and either 16GB or 64GB of internal storage. It has a 1080p IPS LCD 4.7″ display, and a 13MP rear camera, as well as a 5MP front facing camera.
Xiaomi devices have got the official CM 12.1 ROM running on Android 5.1.1 belatedly. Previously, we saw how to install CM 12.1 ROM on Xiaomi Mi 3. Same procedure can be used for Mi 4 also. Follow the detailed guide given below.