I bought these headphones to replace mine, knowing that Nokia does not provide for the use of conventional headphones on the X7 You are forced to buy headphones home if you want to keep the remote control feature on the wire (plug-hook and call, volume control, feed / play and track changes)
I'm just disappointed with the longevity of headphones, I bought 2 and the remote control of the first is already dead (unable to make a quelquoncque setting, forced to leave the laptop)