Mic level on Earpiece is low quality i.e. "Sounds like I'm in a tunnel"

[JeffGS]

• Phone Model: T-Mobile Revvlry, Google Pixel 3 - these are the devices I tested, but I have reports of it happening on others as well.
• Android Version: Android 10, Android 12 respectively
• App Version:18.0.7.42
• 3CX PBX Version: 18.0 (Build 314) / Debian
• Network Connection: Happens on wifi and LTE
• Client is on the same network as the PBX or not? Different

I've tested different configurations of settings: Audio API, Microphone Gain, Codecs, and the result is always the same. We have been on 3CX for nearly 3 years and this has been an issue from the start on Mobile. The Desktop/Webapps & Deskphones sound great in comparison. Has anyone had issues like this? I have read many posts on the codecs which people claim solve their issues, but have had no such luck. When I switch to Bluetooth or Speaker, the audio quality improves significantly.

Audio test recording link

 

[GiannosI_3CX]

Hi, thanks for the feedback.
Could you please provide me in PM app's verbose logs?

 

[JeffGS]

Here's the log and a new recording for you. I was recording the log while making this recording.