Just in case you got tired of the MIUI on your Xiaomi Mi 4 or Mi 3 and want some stock Android action then you'd be happy to know that Cyanogen has released CyanogenMod 12.1 nightlies for both the devices. The latest ROM is built on top of Android 5.1.1 Lollipop, which means you will be getting the latest version of Android, something both the devices are deprived of currently on MIUI. Being nightlies, these won't be as stable as, well, stable releases but if you don't mind experimenting and are aware of the risks that come with installing experimental builds on your device then it's worth a try. You can find instructions to download the files and installation process in the link...
Source: http://www.gsmarena.com/cyanogenmod_121_nightlies_now_available_for_the_mi_4_and_mi_3-news-13665.php
