SOLUTION: Samsung Galaxy S4 no audio sound during phone call.įor me it was a bad SIM Card Reader or Module IF. Hope this helps sorry if I didn't explain it too well. The person on the other end can hear me clearly now. Anyways I couldn't take pics as I was repairing my phone but now my voice is not muffled or garbled when someone on the other end of the call is listening, worked like a charm. I also tried cleaning gently with a cue tip but ended up breaking this little flap off which I believe is only to block water from entering the mic on the board. This covers the mic on the daughterboard. Also you will find attached to this outer plastic phone ring a black rubber gasket or something like that and if you have a needle it has a square little black flap that you can move. When I had the phone apart for a sync port replacement, I took the outer plastic shell that was attached to the screen and where the mic hole was I blew air into it really hard with my mouth to clear and dust and debris. But what worked for me was I found the little pin hole at bottom of phone by charging port.
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