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Downgrade to android 9 from 10 with error

alex4ndrepessoa
Star II
Please tell us some basic information before asking for help:
Model Name: Zenfone 5 ZE620KL
Firmware Version: 17.0615.2003.20
Rooted or not: No
Frequency of Occurrence: Every time when i try this
APP Name & APP Version (If your issue relates to the app): -
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.
========================================
Hello. I downloaded the file update today to android 10 beta version but i don't like, when i try to downgrade my device i see an message warning:
System update failed (3)
Unknow error
Restored system for previous settings
ps: its something like this, sorry if my english is bad
Anyone can help me please? Thank you
11 REPLIES 11

Erwin05
Star III

alex4ndrepessoa
Star II
Erwin05

Did you do it like this:

https://www.asus.com/support/FAQ/1042349


View post
Yes, i do how exactly this, but still showing the error message and can't back to 9.

Y_ASUS
Zen Master I
Hi alex4ndrepessoa,
The upgrade file will be available again on our website later on. Sorry for the inconvenience caused.
Please check your inbox for a message I've sent you. Thank you. 🙂

alex4ndrepessoa
Star II
Hello guys. Now my system update is successful. Thanks all!