Volume controls do not work. Most of these headphones use the iPhone plug standard, not the sony/erickson/nokia standard. I bought a converter line off eBay switching the plugs but that didn't work either.
I'm actually using the Tour with control talk as I'm typing now and they don't work at all. Like my Solo HDs actually have some functionality (play/pause/skip track) but the buttons on my Tour's do absolutely nothing.