FP4: speakerphone mode bad quality in call for the caller

• /e/ version: 1.10 and 1.11-rc.2
• Device model(s): FP4
• Developer mode enabled: yes
• Device rooted: yes
• Trackers blocker enabled: yes

Summary

The audio quality for the caller is not good when we use the speakerphone mode with the FP4 and /e/OS. Also reported by the Fairphone community with the stock rom https://forum.fairphone.com/t/call-quality-and-noise-cancellation-regular-calls-handsfree-signal-voice-messages-microsoft-teams-video-calls/79502.

I may be having speakerphone problems after upgrading to v1.10. I been on two calls where the person I was talking to said they could not hear me while on speakerphone. I never had this problem before.

I have used my FP4 a number if times for Zoom video calls a number of times with no apparent problems. It's curious that when using it for phone calls, people with whom I am speaking say that there is background static, and sometimes my voice fades out.

The problem

Steps to reproduce

Perform a call and enable the speakerphone.

What is the current behavior?

The caller complains about the bad quality of the audio.

What is the expected correct behavior?

The audio quality with speakerphone is high.

Technical informations

** Context **

country	carrier	mode
France	Sosh(Orange)	VoWifi, standard call

Relevant logs (adb logcat)

Relevant screenshots

Solutions

Workaround

Possible fixes