MDB, I appreciate your prompt, concise, and detailed response to my Qs.
Ok, I understand why so.
It’d be good if HA manufacturers offer an accessory that is a small, clip-on mic that pairs with the phone (and HA, possibly) and replaces the mic in the BTE for outbound voice. Placed closer to the speaker’s mouth, directional, it’d do much better in eliminating background noise and improve signal quality for tel conversations. If they can do Partner Mics and such it shouldn’t be too hard to make a clip-on mic.
Oh well…