Yesterday accidentally my zenfone 5 was bricked when i tried to update to kitkat, it's shown only USB logo. Don't panic i use this method to Unbrick My Device. You must know your current build number.
Resources:
- Intel USB Driver for Android ( Download Here )
- ADB Fastboot Tool (Download Here)
- Recovery IMG (Recovery version must be earlier then your current. Download)
- Asus Zenfone Firmware (Download From Asus Website, and Put it in the same folder with adb fastboot tools) Zenfone 5 Zenfone 6 (Select OS Android and Choose Your zenfone Model, the version must be lower than your current version)
- In this Tutorial, My current version is WW2.19.40.6 and i have WW1.17.40.6 Full firmware in My computer so i download WW1.17.40.6 recovery img
- Install Intel USB Driver and Extract ADB Driver
- Copy Recovery img to ADB Folder
- Extract downloaded WW1.17.40.6 Firmware and Copy to Adb Folder
- When USB logoPress Power+Volume up will enter droid mode
- Connect Zenfone with USB Cable to Computer/Laptop
- Open ADB Folder and Open Command Prompt (Shift + right Click > Open Command Here)
- When at Droidboot Type: fastboot flash recovery <filename.img> in this tutorial i type:
fastboot flash recovery 1.17.40.16_22_recovery.img - choose Recovery at Droidboot when android robot appear press volume down+volume up and Choose update from ADB
- Type in CMD: adb sideload <firmwarename.zip> and wait until complete
- Wipe Cache and Data (Tutorial Here)
- Reboot