Asus 5Z (Zenfone 5Z) Flash File – Stock Firmware [ – June 2020]

Updated on June 01, 2020: Today Asus rolled May 2020 security patch update to Asus Zenfone 5Z with build number You can now download it via OTA.

Do you want to install Stock ROM on Asus ZenFone 5Z (ZS620KL)? then, you are at the right place. Here we will share all the latest Asus ZenFone 5Z Stock Firmware Collections. Here we have shared the full list of firmware link to download and install stock firmware on Asus ZenFone 5Z (ZS620KL). As we know, Android is one of the highly customizable software and there is a possibility that we may end up in a situation of lag, boot loop or soft brick. Then, this guide will be helpful. It is always good to keep the Asus ZenFone 5Z Stock Firmware with you in case something went wrong.

If anyone faces problems like Screen freezing, unresponsive Touch, camera fail or bootloop, you can factory reset or flash the latest Asus ZenFone 5Z Stock Firmware. Check the other advantage of Stock Firmware given below.

If you have bought this device and looking for the fresh installation of Stock ROM, then you can simply grab the download link and flash the firmware on your phone by following the guide.

Android always opens the door to various possibilities such as flashing custom ROM or kernel or APK modding etc. These feats can be achieved by providing root access to your device or simply rooting your phone.  In today’s date, rooting or customizing is no rocket science, but people perform these process carelessly. Certain users hastily carry out the modding/rooting process without properly following instructions. It leads to bricking of the device. It can happen with any device. In this post, we will tell you how you can restore or unbrick Asus ZenFone 5Z back to the previous working condition.

Asus ZenFone 5Z Stock Firmware [ - May 2020 Security Patch]

Asus ZenFone 5Z Specifications:

Asus Asus Zenfone 5Z features a 6.0-inch display with a screen resolution of 1080 x 2160 pixels.  Asus Asus Zenfone 5Z (ZS620KL) is powered by octa-core Qualcomm Snapdragon 630 processor and clubbed with 3/4GB of RAM. The phone packs 32/64GB of internal storage that can be expanded up to 400GB via a microSD card. As far as the cameras are concerned, the Asus Asus Zenfone 5Z (ZS620KL) packs a Dual 16-MP primary camera on the rear and a Dual 20-MP front shooter for selfies. The Asus Zenfone 5Z (ZS620KL) runs Android 7.0 and is powered by a 3300mAh.

The Advantage of Stock Firmware

  • Flash Stock To Unbrick your Asus ZenFone 5Z
  • Flash Stock ROM to Fix the bootloop problem
  • Upgrade and Downgrade Asus ZenFone 5Z
  • Unroot or Fix Bugs on your phone
  • To fix the lag or stutter on Asus ZenFone 5Z
  • By flashing Stock ROM, you can solve software problems.
  • Revert back to stock to gain your warranty.

List of Asus ZenFone 5Z Stock Firmware Collections:

Software Version Changelog

Download Here

1. Updated Android security patch
2. Fixed the screen brightness suddenly brightens occasionally
3. Fixed system freeze issue if user leave the device for 50 seconds
4. Fixed misjudgment of battery usage
5. Fixed the occasional screen flashing twice when opening the screen
6. Adjusted gesture navigation to return to Home animation


Download Here

1. Updated Android security patch to 2020-05-05
2. Fixed lag issue when watching Youtube and sliding down the Quick Setting panel
3. Fixed Google map can’t be located the issue
4. Removed Twitch live streaming function in Game Genie
5. Fixed an issue when using face detection to show notifications, the device will be unlocked at the same time
6. Fixed that PDF files are not correctly classified in File Manager
7. Fixed touch not sensitive at bottom of screen issue when playing the game in landscape mode
8. Fixed a UI inconsistency issue between the volume control panel in landscape mode and the sound mode button in the dark theme
9. Adjusted privacy settings for Thailand and Brazil
10. Fixed lag issue when moving left and right fingers during PUBG game


Download Here

1. Updated Android security patch
2. Adjusted touch area of Game Genie toolbar
3. Fixed Wi-Fi hotspot issues
4. Improved Swipe-up gesture navigation function
5. Fixed an issue where apps couldn’t be cleared from Recent Apps view
6. Fixed random restarts happened when accessing Mobile Manager
7. Optimization RF component check mechanism to improving the user experience
8. Optimized system stability
9. Updated apn table
10. Removed Ventelo internet/mms APN
11. Updated Sweden Tele2 APN

  • Drop call and no signal via Bluetooth
  • SD card not working with Q
  • T-Mobile calls not possible with the earpiece
  • The dark theme doesn’t work on Camera settings
  • Phone icon in launcher doesn’t change on applying custom theme
  • 4G VoLTE icon not showing properly in the status bar
  • No subscription function with the wallpaper slideshow
  • selecting swipe-up gesture navigation fails the hide notch function
  • Actions buttons in the battery care notification are non-functioning when Mobile Manager is disabled
  • Screen unlock sound appears twice
  • The dark mode is gray for the QS panel while the notification is still black
  • Resetting app preferences in the Settings causing a system reboot
  • Wallpaper view shows the ZenUI 5 icon
  • All apps menu looks white-washed
  • Update security patch to 2019-10
  • Update apn table to v258

1.Update security patch to 2019-07
2.Fixed occasional can’t reading of SD card
3.Update and optimize System


1.Update Google security patch to 2019-05
2.Improve sound quality
3.Update and optimize System


1.Update Google security patch to 2019-04
2.Improve sound quality and startup Speed


1.Update security patch to 2019-03-05
2.Fix Line Photo Rotates issue
3.Improve sound quality


1.Fix SIM card cannot be detected in multiple time zones
2.Update security patch
3.Improve camera EIS


1. Android Pie update
2. Update security patch


1. Fixed ShortCut Widget Icon too Small Problem
2. Fix the hidding notch function with Youtube
3. Improve the detection frequency of AI scene detect


1. Adjustment battery percentage
2. fix face unlock issue
3. Support Selfie Panorama mode


1. Adding Lift-to-Wake function
2. Adding Gesture Mode
3. Adjusting dual SIM default to 4G+3G


1. Support Capture RAW file
2. Support Panorama feature
3. Enhance the protection of personal information


1. Enhance the screen fluency with setting app.
2. Enhances portrait mode performance.
3. Strengthens WiFi AP connection stability.


1. Enhance camera stability
2. Improve the system stability
3. June 2018 Security Patch


1. Improve camera stability
2. Enhance WiFi AP connection performance

WW- 1. Improve camera quality
2. Enable TWM Volte

Steps to Install Asus ZenFone 5Z Stock Firmware:

Before installing, make sure to follow the pre-requisite and install the necessary drivers and tools on your PC.


  • Remember: Supported for Asus ZenFone 5Z (ZS620KL)
  • Charge your phone: Before you proceed with the below information, charge your ZenFone 5Z to at least 50%.
  • Laptop or PC: To carry out the second method, you need PC or Laptop.
  • Take Device Backup: The very first thing to pay attention to is taking the device backup. If you have are not able to take the backup of phone data, however, if you have inserted a memory card in your device, remove it at least to save it.
  • Install Latest Driver: Install the Latest Asus USB Drivers. [For All Android USB Drivers]
  • Download ADB Drivers: For the Second method, you have to download ADB Fastboot drivers
  • Download: Download the below given required files on your PC.

[su_note note_color=”#fbf5c8″ text_color=”#000000″]

Disclaimer: We at cannot be held responsible if anything goes wrong. Take your own risk!



Instructions to Install on Asus ZenFone 5Z:

[su_note note_color=”#fffde3″]Note: Make sure you have followed the steps properly. Don’t Skip and Read! – We are not responsible for any damage that you make to your phone.[/su_note]

Method 1 – Install via Recovery : 

  1. First of all Download the zip file from above link and rename the file to
  2. Now Switch Off your device and reboot into recovery mode by pressing Power button +Volume UP button.
  3. In recovery mode select apply update from sd card.
  4. Now Choose file which you downloaded.
  5. Wait until installation process completes.
  6. Once the installation process is completed and You can Reboot your ZenFone Max Pro.
  7. That’s it, fellas! Done. you have upgraded your smartphone.

Method 2: Install via ADB Sideload

  1. First of all Download the ADB and Fastboot drivers for Windows and Mac and extract it
  2. Now move the downloaded OTA zip file to ADB Folder
  3. Enable USB Debugging
  4. To Enable USB Debugging, First of all, You need to activate Developer Option on your smartphone.
  5. To activate, Go to your Settings -> About Phone -> Now Tap on the Build Number 7-8 Times until you see a toast message “Developer option enabled”.Root And Install Official TWRP Recovery For
  6. Once your developer option is active, Go back to your settings -> Open developer option -> Enable USB Debugging. 
  7. In your PC/Laptop, Open the extracted ADB Folder and Open Command Window by pressing Shift Key + Right Mouse Click.Root And Install Official TWRP Recovery For
  8. Reboot your phone to recovery by pressing Volume UP + Power button.
  9. Now connect the PC to Mobile with USB Cable.
  10. Now enter the following command in the command window that you open
    adb devices
  11. This command will show if any device is connected properly. If it doesn’t show, then please check the drivers are installed properly or if the attached cable is damaged.
  12. If your device is listed, then please type the below command in your command window.
    adb sideload
  13. Wait until installation process completes.
  14. Once the installation process is completed and You can Reboot your ZenFone Max Pro.
  15. That’s it, fellas! Done. you have upgraded the Asus ZenFone Max Pro.

I hope you installed the Stock ROM on Asus ZenFone 5Z successfully, Now please rate this website with your comment. We always welcome feedback and improvements.



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