Downgrade Android 13 to Android 12

[InteRadek]

Model Name: ZenFone 8
Firmware Version: WW_33.0210.0210.210 (TKQ1.220807.001.33.0210.0210.210)
Rooted or not: No

I would like to downgrade my ZenFone 8 to Android 12. I downloaded the firmware from the support webpage. I put the UL-ASUS_I006D-ASUS-99.1010.0411.160-1.1.9-9999-user.zip file in internal memory (root directory). I also removed the Google account.

Unfortunately, no pop up message about the update appeared. I have restarted the phone, but the downgrade firmware is still not detected. The AppUpdateService and SystemUpdateService services are running in the background.

How can I initiate the downgrade procedure?

[kaczkrzysiek]

Do it by PC using this tutorial: https://www.asus.com/content/android-13-beta/ (How to opt-out and revert back to Android 12)

[eboelens]

hi may I just chime in here sorry for the translation.
May I pitch in here please ?

I have fun with my Zenfone 8 and already used this one several times (How to opt-out and revert back to Android 12).
Today I wanted to use it again but I can't get it to work, and this is bummer. I get the following error message and I can't find anything about this on the Internet:
eboelens@iMacHead ~ % sh /Users/eboelens/Documents/Android/Asus /A12/WW-ZS590KS-31.1010.0410.61-MR0-2204-user-20220422/update_image_for_mac.sh
Password:
-e Get project failed!
eboelens@iMacHead ~ %

any idea please ? I’m on another rom and in fastboot mode, everything seems allright

[kaczkrzysiek]

It seems You doing this on Mac PC, I have never done this way, so can't help 😞

[InteRadek · Accepted solution]

Dzięki @kaczkrzysiek. In the end I didn't use this method, but this a very useful tip.

The firmware package was not detected, when I uploaded it from PC using USB cable. I came up with an idea to download the firmware using Android web browser and move it to the root directory. It wasn't detected at first, but after reboot it was finally detected and I could downgrade back to Android 12. I don't know why the ZIP file uploaded from PC to the same location was not detected.

Tips:

• After downgrade, when the phone is initialized after factory reset, don't connect it to Wifi of mobile data. Skip the connection steps and first go to Settings > System > System update. Disable automatic system updates and then connect to the Internet. Otherwise it will immediately start to download upgrade to Android 13 and it can't be stopped or disabled.
• If it starts downloading the update, turn off the phone and start it in the Recover mode (Vol Up + Power button). From there a factory reset can be initialized which will wipe all the data and settings.

@victornymbergWifi was working fine. I had trouble with Bluetooth.

[BAMSooo]

Ini tidak berkerja untuk saya . Sudah di coba hasil nya ngga ada sama sekali. WiFi tetap rusak dan hotspot jga demikian. Jadi saran untuk semua ini tidak berpengaruh untuk solusi WiFi mau bluetooth. Ini membuang waktu saha