My wife says when I turn off the HA mics via the Hearing widget mic button, the phone calls sound a lot louder and clearer with my voice input through the iPhone phone mics. She said I don’t sound like I’m down at the end of a tunnel with the HA mics, but my voice is just very soft compared to voice input via the mics on the iPhone. If I turn up the “microphone levels” via the sliders in the Hearing Widget, she says my voice is louder but still relatively soft, and I am amplifying background noise levels, too.
I have separate right and left ear controls in my screenshot above of the Hearing widget screen because in Settings, Accessibility, Hearing Devices, MFI Hearing Devices, I have turned on the slider “Adjust Independently” for no good reason (My Jabra Enhance Pro 20 review - #16 by jim_lewis). When I am in a call, the mic input button disappears from the Hearing screen, which goes along with what I’ve read that you can’t switch hands-free calling on or off while in a call. If I turn off the Adjust Independently slider, here’s what my Hearing widget screen looks like:
From now on, I’ll probably turn off mic input from my hearing aids and use my iPhone mics so my voice sounds as loud and clear to my callers as possible.