Step 1: Download and Install Asus Zenfone USB Driver on your PC. Enable Developer Mode and USB debugging mode on your Smartphone by this guide. Now download Flash Tool and extract zip or rar file in desktop and open it.
Step 2: Now double click on Asus_Zenfone_Flash_Tool_V2.0.1.exe and click on Next button. Click on Next and install option. You will see a windows security dialog for install Asus Zenfone drivers. Now click on OK option.
Step 3: Now, Asus Flash Tool will be installed on your computer. That’s all.
How to use Asus Zenfone Flash Tool:
Step 1: Download Asus Zenfone stock Firmware and Copy in desktop on your PC. Open Asus flash tool. Now, connect your Asus Zenfone device to computer using USB cable and click on Disconnect option.
Step 2: Now, locate the Asus Zenfone stock firmware and click on Browse button.
Step 3: Click on Flash button to start flashing process. Now, Your device will restart automatically. Long press and Hold volume down and Volume Up button to Recovery mode. Your phone is going to Recovery mode.
Step 4: Now, under the recovery mode Select Apply Update from ADB and Click on Resume button to resume the flashing process. Once, flashing process is completed you will see restart your device and disconnect from PC.
I hope you get your desirable Asus Zenfone Flash Tool version. You can easily install it and flash your ROM and custom recovery. If feel any problem in this guide then please use comment box. Thanks to all.