Zenfone: Downgrade Tutorial

Better way to Downgrade Your Zenfone : Read Here

Downgrade Tutorial one of solution if you have brick zenfone. credit to  地球新球长

Zenfone must enter fastboot ( droidboot )

1. Download Android Platform tools http://d-h.st/ZN2
2. Download Fastboot.img ( T00F T00J T00G) Download button at the top= Place it at D:\platform-tools
3. Then ready for an earlier version of the firmware, the inside of fastboot.img extract to the platform-tools (in this tutorial D:\platform-tools). 
4. placed firmware under the platform-tools ( Do not extract .zip firmware) 
5. Connect the phone, the phone open to fastboot (droidboot) mode, open a command prompt then type D: and enter then type cd platform-tools then the command prompt characters should be D:\platform-tools
6. then type fastboot flash fastboot fastboot.img Enter, wait for command execution finished entering a carriage return after fastboot reboot-bootloader prompt OK, then restart the phone, you can appear a recovery option
7. Select the recovery option, the phone reboot to recovery mode, press the volume down button, and then select apply update from adb
8. PC command prompt should now D: \ platform-tools \, enter the command adb sideload <firmware name you download before> zip (replace firmware name) Enter
9. Patiently wait for the prompt to restart after Complete