Please return my android 9.. Asus 5z can handle android 10.. It sucks..
If you want to downgrade 5Z from aandroid 10 to android 9, download the firmware from the official website.
https://www.asus.com/Phone/ZenFone-5Z-ZS620KL/HelpDesk_BIOS/
Downgraded firmware file:
https://dlcdnets.asus.com/pub/ASUS/ZenFone/ZS620KL/UL-Z01R-WW-90.11.162.111-Downgrade-user.zip
A10 is actually better and close to stock. by all means you can downgrade to pie but dont be disrespectful
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If you want to downgrade 5Z from aandroid 10 to android 9, download the firmware from the official website.
https://www.asus.com/Phone/ZenFone-5Z-ZS620KL/HelpDesk_BIOS/
Downgraded firmware file:
https://dlcdnets.asus.com/pub/ASUS/ZenFone/ZS620KL/UL-Z01R-WW-90.11.162.111-Downgrade-user.zip
A10 is actually better and close to stock. by all means you can downgrade to pie but dont be disrespectful