Can't use the microphone VIE Support December 29, 2016 05:55 Updated Please check if the microphone is compatible with the standard smartphone jack(3.5mm input, 4 rings) Please check if the mode switch on the right hand side set as "BT". Related articles Can I use the mic? Please refer to "Quick Setup Guide" The headphones do not fit to my head. Mute Function is not available. Unable to pair with the phones. Comments 0 comments Please sign in to leave a comment.