Zenfone 9 downgrade from A13 to A12

[Sandrix96]

Hi,I would to downgrade my Asus Zenfone 9 from Android 13 to Android 12,I followed these steps
"Steps of Update:
1. Download the firmware to internal storage.
2. Remove Google Account.
3. Pull down the quick setting list.
4. The system will pop up a message which detected a firmware update info.
5. Execute the downgrade firmware file.

But,when I copy the firmware to internal storage,I don't have any notification,how I resolve?

Thanks.

[ZenBot]

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