Jan 21, 2021 · 0. Dec 18, 2016. #1. Hey guys, I noticed that when my earphones are plugged into my iphone, the iphone internal mic stops working, and the earphones mic starts working instead. I have a problem where my mic on my earphones has stopped working. So, when I plug my earphones in, the mic on earphones does not work, and no one can hear me.