Guide on How to Flash Asus Zenfone 7 Pro ZS671KS with Flash Tool, Firmware or Stock ROM

After the launch of Asus Zenfone 7 Pro ZS671KS on — we shared content here on APKMayor about the Zenfone 7 Pro ZS671KS full specifications, its amazing features and purchase price in online and offline stores for lovers of Asus. In another post, we talk about how users can carry out a do-it-yourself (DIY) guide on how to soft reset or hard reset the Zenfone 7 Pro ZS671KS as the case may when the need arise like if it starts to become unresponsive or before gifting it out to a friend or family for use.

Now as earlier explained in our “Essential App issues and Fixings” and “Quick Fixing Guide” that shows steps for the camera, wifi, Bluetooth, etc. You should note that not all issues on your Asus Zenfone 7 Pro ZS671KS require flashing. We strongly advise that for phones still under warrantee the users should first locate the nearest service center for them to troubleshoot, fix or replace and the case may be. But if you have tried that already and it failed then, you should probably opt-in for formatting in this case I will show you how to use Android Flash Tool to format your Zenfone 7 Pro ZS671KS.

Easy Steps on how to flash Asus Zenfone 7 Pro ZS671KS Back to Its Factory State:

Step 1: You will need to download and install the USB drivers for Zenfone into your PC

Step 2: You will need to download the Zenfone flash tool V2.0.1 or the latest preferable

Step 3: Now you need to extract the flash tool file and run the execute file that ends with .exe, which will lead you to the on-screen instructions to install Asus Flash Tool.

Step 4: Before you process to the next step please make sure you have already backed up all your device data, if you have not and this is a device that has issues that you want to wipe proceed to step 6.

Step 5: You have to make sure that the device USB debugging is enabled, if it’s not, don’t worry much, running a hard reset on the device will make the device USB debugging enable temporaly, follow here to check how to Hard or Soft reset your device.

Step 6: Now you need to download and extract the device stock rom, you can get the stock rom from here.

Step 7: After downloading and extracting the stock rom to a good destination folder, you need to launch the Asus Flash Tool and connect your device to it, but before we continue I hope you have read the Disclaimer, that we will not be help accountable for whatever your do to your device or anyone’s device from this tutorial, for we expect you already have knowledge of what you are about to do and the risk involved.

Step 8: Now click on the “disconnected button” and you will be able to browse the stock rom you downloaded and extracted.

Step 9: If the device is not dead, the device will restart immediately you add the stock rom, and now you need to put the phone into factory mode, by long press volume up and down button while the device is about to boot up.

Step 10: When in factory mode, go to update ADB with “apply update from ADB” and now start the flashing process.

Step 11: Please disconnect your device after the flashing process is done.


Just before you follow the tips below to upgrade or downgrade your Asus Zenfone 7 Pro ZS671KS. Do a backup of your personal data:

  • Do a manual backup regularly of your Asus Zenfone 7 Pro ZS671KS following our guide with data or Wi-Fi connection.
  • Users can also a backup of Asus Zenfone 7 Pro ZS671KS offline – without an internet connection following the other guide.

Tips to Remember:

  1. This update is meant for Asus Zenfone 7 Pro ZS671KS users only.
  • TWRP Recovery is a good alternative on how to upgrade your device if you don’t want to do it the normal way. Here is a post on TWRP Recovery.
  1. APKMayor is in no way responsible for any damage you might have on your Asus Zenfone 7 Pro ZS671KS while installing the update.
  2. The usual upgrade steps requirethe use of a PC or Laptop to carry out the firmware flashing.
  3. Ensure that you have updated and working USB drivers installed.

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