Well, I used to have the same problem over and over. First of all, you can try turning on your video because most audio works when the video is turned on. Second of all, you can try one of your three microphones. Most people’s devices have three different sources of audio connection that they can try. Third of all, there’s supposed to be this button on the earpiece, try pressing it once and see if it works. Fourth of all, try to increase the volume on your earphones with the little plus button, it also has a minus button to reduce. And last of all, just check if your earphones are plugged in properly and that none of the wires have issues. If any of these work, then you’re welcome, but if they don’t work, then I’m sorry, you should see a professional or just get new earphones!