Dreadful call quality with Bluetooth headset

[nefibi3428]

Informations:
Zenfone 8 - brand new, 5 days of life
Android 12
Firmware 31.1010.0411.89
Baseband M3.13.24.64

Hello everyone, I hope you can help me.
When I use bluetooth headsets the person I'm talking to can't hear me well. They tell me my voice is robotic and has an echo. For this reason I can't do long calls, beacause their poor quality is very annoying for the others. On the other hand I can hear them perfectly, no issues by my side.
I tried with my Huawei Freebuds 3 and with Apple earpods, but it's the same.
Generally speaking, this phone call quality isn't very good, but still tolerable.
Instead the calls made via Bluetooth headsets are terribile.
Do you have any suggestions? Anything that can help me? Did some of you have the same issues?
Thank you in advance.

[Mattias_ASUS]

This is a very odd thing, it does sound like there could be some interference going on.

[Ronzky321]

I noticed with Zenfone 8 BT is that it defaults to the lowest possible bit rate. From my experience, playing games with bluetooth headset, the sound is trash to almost cutting off if there are too much sound/music going on. Another is I have a Qudelix 5k and using LDAC with adaptive bitrate. The bit rate is always the lowest (330 kbps) no matter how close my phone is.

[nefibi3428]

Mattias_ASUS

This is a very odd thing, it does sound like there could be some interference going on.

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It could be but consider that the problem comes out only with the headsets. No issue with the car bluetooth.

[Danishblunt]

nefibi3428

https://zentalk.asus.com/en/discussion/comment/219300#Comment_219300

It could be but consider that the problem comes out only with the headsets. No issue with the car bluetooth.

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when connected to your device, to into developer settings and change the bluetooth codec.

[nefibi3428]

Danishblunt

https://zentalk.asus.com/en/discussion/comment/220719#Comment_220719

when connected to your device, to into developer settings and change the bluetooth codec.

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I tried. I don't know if It Is due to your suggestion, but now the interlocutor seems to hear me well.
Thank you, I appreciate your help.