Hello everyone. I have a problem with downgrading from Android 10 back to Android 9.

ZitherZither Level 1
edited May 2021 in ZenFone Max Pro Series

Please tell us some basic information before asking for help:

  1. Model Name: Asus Zenfone Max Pro M1
  2. Firmware Version: Android 10 (438)
  3. Rooted or not: Not rooted

In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.



  • ZitherZither Level 1

    Hello everyone Please help me with my problem. It's like this, I already downgraded my phone from Android 10 to Android 9 however I noticed that regulatory labels are missing and also uses more storage on RAM yet I just have little apps installed. PLEASE LET ME KNOW how can I solved this. Also it drains my battery faster than it should.

  • Hi Zither

    Thank you for your asking. Based on your screenshot in Recovery Mode, I noticed that firmware version you had installed is WW-16.2017.2009.087. Did you downgrade your firmware by installed this firmware image file?

    Please note that Android 10 to Android 9 downgrade steps can only be performed by installed Version MaxProM1_downgrade_to_9 image file, which leads to firmware version WW-16.2017.1912.060.

    May you share your downgrade steps to me for further checking? If you have any concern, please upgrade to Android 10 beta WW-17.2017.2008.432 then follow the steps below as 10 to 9 downgrade steps.

    1. Download "Version MaxProM1_downgrade_to_9" and then put the image file into the root directory of the MicroSD card.


    2. Insert MicroSD card into phone and then power off the device.

    3. Long press with "Power" key and "Volume Down" key together and stop after feel the vibration to enter Recovery Mode

    4. Use "Volume Down/Up" key and press "Power" key to choose "Apply update from external storage"

    5. Select the downgrade file

    6. When the updating process is done, Choose "Wipe data/factory reset" and tap"Yes" to perform the master clear.

    7. "Wipe cache partition" > "Yes"

    8. "Reboot system now" 

  • ZitherZither Level 1

    Thank you for your response, I already downgrade to Android 9 ver 060 and further upgrade until ver 087 of A9 but the REGULATORY LABELS are missing and It consumes a lot or RAM STORAGE also, it makes my phone very heat while playing games I usually play and even drains my battery very fast. So I updated back to A10 where the REGULATORY LABELS appeared already but the problem in RAM STORAGE and OVERHEATING and BATTERY DRAIN is still my concern. I already calibrated my device but nothing changed. Please help me how to fix this problem.

  • ZitherZither Level 1

    The first screenshots I sent was taken yesterday, and now I am sending another screenshots taken as of now. I think the overheating is due to lot of STORAGE occupied in RAM that also crazily drains my battery. I even deleted some apps but still RAM STORAGE is like this. Before I updated to A10 for the first time, RAM occupied around 1.5GB-1.8 GB but with this update oh cmon I think its not normal because I un installed some apps.

  • Hi Zither

    Thank you for your reply. My device has switched version between Android 9 and Android 10 for more than dozens of times, yet Regulatory Labels still persists.

    1. Did you purchase the device from ASUS authorized channel?

    2. Have you ever unlocked your device?

    Please try to perform Factory Reset first.

    If the issue remains the same, please check your inbox and provide me your SN, IMEI, and purchased channel for further checking.

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