- Download Zenfone 4 Platform-Tools: 4Shared
- Enable USB Debugging in Developer options.How? enable developer options and check usb debugging (Tutorial)
- Turn Off HH.
- Press and hold power button + volume up + volume down until android green robot.
- Connect the USB cable from the PC to Zenfone.
- Extract Platform-Tools.zip , then enter in the Platform-Tools folder (there his boot.img).
- Still in the Platform-Tools folder, open the Command Prompt (Hold Shift Keyboard + Right Click Mouse).
- Type: fastboot flash boot boot.img and press ENTER
- Reboot HH.
- Do it with your own risk (DWYOR)
- Wifi Won't turn on Fix Tutorial HERE <-need rooted device
Original Post and Credit to https://www.facebook.com/ricky.tnt