How to Downgrade Asus Zenfone KitKat to JellyBean

Downgrade Zenfone KitKat to JellyBean – Updates to kitkat on zenfone newly granted by asus is still not perfect and there are still many bugs. If you are uncomfortable with the current updates KitKat, you can downgrade to a JellyBean, and you can do an update to KitKat if Asus have fix the bug and release a firmware update.

Preparing Tools :

  1. Intel USB Driver for Android (Download Here)
  2. ADB Fastboot Tool (Download Here)
  3. Recovery Image (Zenfone 4Zenfone 5, Zenfone 6)
  4. Download 4.3 Jellybean Firmware (Zenfone 4Zenfone 5, Zenfone 6) -> Other > Firmware> 


Instructions:

  1. Install Intel USB Driver and Extract ADB Fastboot Tool
  2. Copy Recovery Image to ADB Folder
  3. Extract downloaded 4.3 Jellybean Firmware and Copy to ADB Folder
  4. Turn On USB Debugging (Tutorial Here)
  5. Connect Zenfone with USB Cable to Computer/PC
  6. Open ADB Folder and Open Command Prompt (Shift + right Click > Open Command Here)
  7. Type: adb reboot bootloader
  8. When succed reboot and enter fastboot Type: fastboot flash recovery file.img (file.img = adjust the filename, recovery image that you download earlier)
  9. Then Go to ADB: choose Recovery when android robot appear press volume down + volume up and Choose update from ADB
  10. Type adb sideload file.zip (file.zip = adjust the filename, asus zenfone firmware that you download earlier), and wait until complete
  11. Wipe Cache and Data (Tutorial Here)
  12. Reboot
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