By Kevin Stone, 11 October, 2014 Forum Hardware and Accessories I just purchased some aftershokz blue headphones. When I receive a call, the person on the other end cannot hear me. Can anyone help me with this? Options Log in or register to post comments Comments It Depends on It depends on what model you bought. My guess is you most likely bought these upon recommendation of BlindSquare or a similar GPS app. The link on the BlindSquare documentation page leads you to an older model of these headphones, which do not include a built-in mic. The mic did not come until newer, slightly higher priced models.