Hi everyone. I was hoping someone could help me with a headphone question. I just bought the Sennheiser PMX-680i headphones thinking that the controls on the headphones (play-pause/volume up-down) would function. Well, turns out that only the play/pause button does what it's supposed to. The volume control does not control the volume on the phone or while music is being played. I'm using PowerAMP. Am i overlooking something here? The jack has 4 conductors (three isolator strips). The headphones say they there made for the iphone, but I find it hard to believe that only the iphone has this type of hardware configuration where the volume can be controlled remotely. So the question to be answered is; should the volume controls on the Sennheiser PMX-680i work on the EVO 4G? Thanks for your help.