Credits goes to @TecnoTailsPlays
The changelogs included by the developer include :
Now the rom will install via TWRP
-improved responsiveness of touch and other sensors
-audio is now really more loud
-some apps got updated to cyanogen os apps (like true caller, new audio fx)
-the home launcher can be on horizontal now (all launchers have experimental support)
-improved 2D/3D performance
-Improved camera/video quality
-improved panorama quality
The installation is pretty simple. You unlock the bootloader, flash twrp recovery and flash the ROM zip file via TWRP recovery.
1. CM12.1 ROM
2. TWRP Recovery
3. Bootloader Unlock
4. ADB 1.0.32
Instructions for flashing TWRP recovery :
Go to bootloader > Power off phone and then Press and hold Vol UP+Power till you feel a vibration and see the ASUS Logo.
Connect to PC, copy the new-twrp.img file downloaded above to ADB folder (downloaded above)
Press Shift+Ctrl+RClick on a white space in ADB folder and click OPEN CMD WINDOW HERE
Enter the command to flash : fastboot flash recovery new-twrp.img
Instructions to flash zip via twrp :
Copy the ROM file to internal storage.
Open TWRP recovery via bootloader
Select Wipe > Select Dalvik Cache, Cache and Data > Swipe to Wipe
Go back to home screen of TWRP > Install > Scroll down and select ROM zip > Swipe to flash
Go back to home screen of TWRP > Wipe > Swipe to Factory Reset
Remember first boot might take a long time, please be patient.
Enjoy your new CM12.1 rom running on Android 5.1.1 on your Zenfone 5!