UPDATE: I found out that all of them work but one only works if it is plugged three quarters of the way in.Not all the way.I will mark the one that is like that.The buttons are not for mute, as I stated above, or for volume.I do not know what they are for.Sorry about this late entry but I did not think to try them out on my cell phone before I placed the ad.If the winning bidder does not want them. I will refund their credits in full and not send them.Winning bidder will need to let me know.Sorry again.My fault.