Did you any other similar app like viber if it comes with same error? If yes I would contact Samsung support via Members app
Head over to your dial pad and type in *#0283#, then select “Start: RCV_1stMic”, speak into your phone like you’re on a call, can you hear yourself talk?
Once you’ve done that select “Start: SPK_2ndMic”, talk into your phone like you’re talking to someone on speaker phone, can you hear the playback?
Let us know the results.
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