Download this file:- http://sh.st/z8oK0

install Zenfone 5 Drivers

FOLLOW STEPS CAREFULLY :-

  • After downloading adb & fastboot tool extract it to desktop .

  • Copy UL-ASUS_T00F-WW-2.21.40.44-user.zip in adb folder.

  • Open UL-ASUS_T00F-WW-2.21.40.44-user.zip and extract recovery.img from it.

  • Open your mobile in droidboot mode

  • Now open adb folder and press SHIFT + Right Mouse Button and select open command here

  • Then type fastboot flash recovery recovery.img then enter

  • Now select recovery mode thn press power button ( if u dont know how to select recovery mode in droidboot mode open the link in step 4)

  • now select apply update from adb then connect with pc and leave it

image source—www.asus-zenfone.com

  • now again follow step 5

  • now type adb sideload UL-ASUS_T00F-WW-2.21.40.44-user.zip then enter.

  • now reboot and enjoy

NOTE- ask me if u have any problem in comment section.