Samsung Galaxy S4 Microphone Problem Ways, Mic Not WorkingThis is another simple solution for Samsung S4 I9500 Microphone mouthpiece not working problem. The Samsung S4 I9500 used a 5 pins digital microphone in the printed circuit board (PCB). A you can easily find a replacement on it on another latest Nokia mobile phones that uses also the same 5 pins microphone.
Just refer to the solution below if the said microphone on the device doesn’t work.
The solution above shows the conenction line paths of the MIC supply voltage, MICdata, MIC audio clock and ground pins, for easy tracing and check up procedure. You may start tracing each connection line paths, check all of the 100 ohms resistors, replace the digital microphone