I found that I was wrong by testing the mic with sending voice message to myself (WhatsApp, Viber and messenger) ... always they send the voice messages by the phone mic ... but when I switched to call (not voice message) it works just fine .. try it ...
Yes I have faced this with some bluetooth headphones. Included the Galaxy Buds.
So voice wont work but phone will
Apparently I'm trying to play pubg but that too none supported
Not even galaxy buds
So basically bluetooth can only be used for phone calls what rubbish is this
We need to spread this make people aware
So they dont spend a lot of money on buying such products even Samsung then for that matter.
I was trying to send voice messages by Whatsapp or Viber.
But the fact that that the voice calls by Whatsapp and other apps are good ... only voice messages.
That because when you hold the button for the voice you must send the voice bia the built in mic.
So it is working fine for all calling.
I have exactly the same problem on my Samsung S9 - microphone in my helmet bluetooth headset Interphone F3MC is not working with phone calls. It works fine with voice notes (like Google Keep), but no chance to call someone.
I am very disappointed with Samsung!