Unbrick or Restore Asus Zenfone 5Z ZS620KL | EDL Mode Bootloop or Dead

In this guide, we will show you the steps to unbrick your Asus Zenfone 5Z (ZS620KL) and restore it back from dead. These devices have always been known to be quite active in custom development. Be it flashing custom ROMs or custom recovery such as TWRP there’s a lot to try out.

Along the same lines, you could also root your device via magisk and install tons of mods. However, flashing these custom binaries might bring in some risks as well. There is always a chance of the device getting into a boot-loop or soft brick. Moreover, if the device’s partition gets corrupted, it could well result in a hard brick. Well, if that ever happens to your device, you may easily bring it back to life. Given here are the detailed instructions to unbrick your Asus Zenfone 5Z (ZS620KL) device. Follow along.

Unbrick or Restore Asus Zenfone 5Z ZS620KL | EDL Mode Bootloop or Dead

Pre-Requisites

Now before we go ahead and unbrick your Asus Zenfone 5Z ZS620KL from dead or bootloop, let us make a list of pre-requisites that are required to restore it:

Charge your phone

You need to make sure that your Asus Zenfone 5Z ZS620KL is charged to about 60% before following the unbrick your Asus Zenfone 5Z ZS620KL from dead.

You need a PC or Laptop

We would be running certain ADB and Fastboot commands that can be executed via PC or a laptop. So, we would need a computer in order to unlock the bootloader.

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Download USB Drivers

In order to make your Asus Zenfone 5Z ZS620KL recognized by your PC, you need to have proper USB Drivers appropriate to your phone installed on your computer. And for that, you can follow the link below to download the correct Asus USB Drivers on your PC.

Download ADB and Fastboot Binaries

ADB and Fastboot drivers or tools are really useful to run system-level commands on your connected device using the computer in a matter of seconds. Whether you want to run fastboot or adb commands on the device, or sideload OTA files, or remove programs, etc. You can grab ADB and Fastboot binaries here.

Download Qualcomm USB Drivers:

Download EDL Unbrick Firmware

Download the Asus Zenfone 5Z RAW Firmwares from the below link. If you have the Tencent device, then flash the CN firmware. For Global users, they need to download the WW. [Credits: XDA Senior Member sabpprook].

That’s it. These were all the requirements. You may now proceed with the below steps to unbrick your Asus Zenfone 5Z device.

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Instruction Steps

Step 1: First of all, download and install Qualcomm USB driver and ADB and Fastboot driver. If you don’t your smartphone will not be recognized as a connected mobile phone.

Step 2: 1. Download “WW_ZS620KL_80.30.96.111_MR2_20180921002943_release-user.raw.zip” and Download “CSC-ZS620KL-80.02.237.70-FAC-eng-20180810191100-factory.zip”.

Step 3: Now install python 2.7.

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Step 4: Go to directory /WW_ZS620KL_80.30.96.111_MR2_20180921002943_release-user.raw/factory_for_QMSCT.

Step 5: Execute “unparse_img.bat”

Step 6: Extract “fs_image.tar.gz.mbn.img” from “CSC-ZS620KL-80.02.237.70-FAC-eng-20180810191100-factory.zip” to “WW_ZS620KL_80.30.96.111_MR2_20180921002943_release-user.raw” folder.

Step 7: Run QMSCT and follow the steps in “Draco_ZS620KL_QMSCT_download.pdf”

Step 8: If successful, hold vol down + power button to reboot, it will show the splash screen

Step 9: Reboot to bootloader and use AFT v1.0.0.71 to flash “WW_ZS620KL_80.30.96.111_MR2_20180921002943_release-user.raw.zip” again.

Step 10: Reboot and get a fully functional device back

Anytime, you can re-enter the fastboot mode and flash the official raw file again.

So with this, we conclude the guide on how to unbrick Asus Zenfone 5Z (ZS620KL). If you have any queries concerning the aforementioned steps, do let us know in the comments. Rounding off, here are some iPhone Tips and TricksPC tips and tricks, and Android Tips and Tricks that deserve your attention as well.

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