Try using the mic on another device like a computer and see if you get the same result. It could be a defective mic. Another possibility is the mic may not have been inserted all the way. I have had issues with them where you think they are in all the way, but not. I have had issues when a headset was only providing sound out of one ear piece. Found out the plug was not firmly seated all the way. Push it a bit farther and voila ! Stereo sound out of both. Could be a similar issue if it was a stereo mic.