Another hardware solution for Nokia X3-02 holds for not working earpiece speaker problem. This solution may help if after confirmed that the speaker is working well or already tried replacing it, but still there is no voice sound can be heard during a call conversation.
The solution below shows the components where the audio data signals of the earpiece speaker feeds. Just locate it on the Nokia X3-02 PCB board and do some check and test procedures.
Nokia X3-02 Earpiece speaker connection tracks
You may check and do a replacement on the filter coils used in the circuit. Trace each of the speaker connection line paths.
