Step 3Find the microphone and the speaker
Second, you need to find the microphone in the phone. It's usually located near where you place your mouth (another coincidence!). Then you will find its 2 connections to the PC board.
Now, you need to examine the phone to locate 1 or 2 places where you can enter the wires in the phone. I used an old tip on my soldering station to melt the case plastic, then I inserted the wires in the phone.
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