XenonHD is a custom firmware aka ROM for various Android devices. It is based on CyanogenMod 14.1 with additional features, performance and battery life improvements.
The idea behind XenonHD is to give users a ROM that is "blazing fast, rock stable and buttery smooth".
Copy the downloaded ROM to your phone.
Boot into your recovery
Back up your ROM
Make a full wipe (system, data, cache, dalvik)
Install the ROM
Install GAPPS package
Reboot - the first boot can take up to 5 minutes
XenonHD, ROM for the Xiaomi Redmi 3
Source Code: https://github.com/TeamHorizon
ROM OS Version: 7.x Nougat
ROM Kernel: Linux 3.10.x
ROM Firmware Required: Unlocked BL, Recovery
Based On: Cyanogenmod
Last Updated 2016-12-17