How to Change Zenfone 2 Firmware from CN/TW to WW

Today ASUS Zenfone Blog will teach you How to Change Zenfone 2 Firmware from TW/CN to WW. Asus Zenfone 2 firmware divided by three region CN for China, TW for Taiwan and WW for Worldwide/Global. By changing SKU/Firmware from your original SKU/firmware can make your Zenfone 2 will not able to  get OTA firmware, but you can do it Manually via ADB Sideload / SD Card update.

DWYOR (Do it With Your Own Risks)

Files to Download:

  1. Asus Zenfone 2 Recovery Images ZE550ML=Z008, ZE551ML=Z00A (DOWNLOAD)
  2. Asus Zenfone 2 Firmware (Download for ZE550ML, Download For ZE551ML)-> Choose Android then Firmware and choose WW version
  3. Intel USB Driver (Download)
  4. ADB (Download)


  1. Download all files above (Note: choose same recovery and firmware ex: download Z00A  and download firmware)
  2. Install Intel USB Driver
  3. Open Downloaded ADB then extract it
  4. Place recovery, firmware to ADB Folder
  5. Enable USB Debugging (Settings>About>Software Information>Tap Build Number 7 times then in settings developer option menu tick usb debugging)
  6. Connect Zenfone 2 with PC/Laptop
  7. in ADB Folder press shift+right click > open command here
  8. Check Zenfone 2 connected properly or not (Type in cmd: adb devices) "press allow and remember your choice" on zenfone 2 screen
  9. You will see your Zenfone 2 on cmd list
  10. Type in cmd: adb reboot bootloader
  11. Zenfone 2 will reboot to bootloader
  12. Type This at CMD:
    fastboot flash recovery recovery.img
    fastboot flash boot boot.img
    fastboot flash fastboot droidboot.img
  13. Reboot Phone
  14. Copy Zenfone 2 firmware to Phone Storage and wait for notification and wait until finish or you can flash via ADB Sideload