Need Help Downgrading

[bart_geron]

For some reason, I have upgraded my Zenphone 5 to the beta release on the website. However, I want to roll back to the stable firmware.
Can someone help me in downgrading?

My current version is QKQ1.190723.002.WW_Phone-17.0615.2005.25-20200604

Thank you so much. Really want to do it.

[Erwin05]

Download Version Android 10 downgrade to P from the downloadsite and follow the steps in the link below.
[Phone] How to downgrade OS version from Android 10 to Android 9 target version? | Official Support ...Asus ZenFone 5 download site:
ZenFone 5 (ZE620KL) BIOS & FIRMWARE | Phone | ASUS Global
https://dlcdnets.asus.com/pub/ASUS/ZenFone/ZE620KL/Q-P-UL-ASUS_X00QD-ASUS-16.0615.2002.120-1.1.33-us...

[bart_geron]

Erwin05

Download Version Android 10 downgrade to P from the downloadsite and follow the steps in the link below.

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

Asus ZenFone 5 download site:

https://www.asus.com/Phone/ZenFone-5-ZE620KL/HelpDesk_BIOS/

https://dlcdnets.asus.com/pub/ASUS/ZenFone/ZE620KL/Q-P-UL-ASUS_X00QD-ASUS-16.0615.2002.120-1.1.33-us...

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Thank you @Erwin05 but I am getting an error 21 - footer is wrong: Signature verification failed. What should I do?

[Christine_ASUS]

Hi bart.geron
Thank you for your asking. Kindly try some stay-at-home troubleshooting tips below:
1. Re download the firmware file again from PC, to ensure the file is downloaded completely.
2. Since the cross-Android upgrade/downgrade will perform the factory reset, please try to manual perform the factory reset before downgrading.
3. Make sure your file is put in the root directory, aka the outermost place, of the mocroSD card.

[ZT-0309585f]

I don't have a micro SD, how do I downgrade?