Has anyone successfully used the Nexus One headset to end a call? In the manual it says that you press the button on the headset once to mute/unmute a call, or press and HOLD to hang up a call. When I press and HOLD all that happens is the phone goes to hold; the phone does not hang up. Furthermore while searching online I see that everyone else is experiencing this problem as well. There are many threads of people having problems, but I can't find anyone that has successfully gotten this feature to work. Has anyone here gotten this feature to work? I'm about to exchange this phone for a new one if it's a defect, but if all of the Nexus One phones are like this, then it makes little sense to exchange it for a new one.