Just before installing and flashing anything, be sure you flashed the right zip supported for your Android version and phone! Otherwise the mod will not work or cause soft brick to your phone. Note also I won't take any responsibility if anything mentioned above happens.
These links will re-direct you to the original XDA thread - there you will find necessary information about supported devices, ROMs etc.
Require Android 4.2+
General Installation Guide
- Downloaded a .ZIP file? Flash it.
- Got an installable .APK file? Install it.
- Got an .APK File that cannot be installed? Push it to /system/app, change its permissions to rw-r-r, delete cache+dalvik and reboot your device to take the effect.