Asus Zenfone 8 always occur Echoing sound while having phone calls in speaker mode

[alexweiheng7]

Please tell us some basic information before asking for help:
Model Name: Zenfone 8
Firmware Version: 31.1010.0410.43 (just upgrade to android 12)
Rooted or not: not rooted
Frequency of Occurrence:
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.
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When I am having a call with anyone (even using internet call or normal cellular call). and I turn on my speaker mode, my Zenfone 8 will have very loud echo sound until it is very hard to bare.
I have test voice recorder and speaker, all was ok and even tested at in calculator apps with .12345+=. everything was fine.
I have just bought this phone and barely even use for few week and started using it and this occur 😥.
right now I am still finding ways to rollback to android 11 and hoping that is it software problem.

thank you.

[Iva]

Same problem, extremely annoying! Whenever I turn the speakerphone on, regardless of whether on WhatsApp, Viber, or normal Call, the other side hears their voice with extreme echo and asks me to turn the speaker off. They can hear me fine, I can hear them fine, but as soon as they start speaking it is impossible to do so without my phone returning them a very loud echo of their voice. This is a very annoying issue since I almost always use my phone on speaker and am now practically unable to do so. If it does not get fixed soon I will have to return the phone since it is still in warranty and such an issue is a total deal-breaker for me.

[arielsajda]

@CH_ASUS
@Gustav_ASUS
@Christine_ASUS
Guys help with this issue?
Hardware? Or software?
How to fix?

[Ollandos]

Same here. Only workaround I found is to turn the volume down.

[#5]

On my phone, loud mode works fine.

[th_besch]

Same issue here. And it is a new problem. It did not occur in the beginning. I use the phone since June 2021 and today was the first time the echoes appeared.