I use mine with both a regular corded headset and a wireless Jabra
freespeak. The hang-up button on the wired one doesn't work, what I found,
instead of pulling mine out of the holster and opening it, was just to reach
over and pull the headset jack partway out (case closed/headset not plugged
in/it hangs up immediately), then push it back in and ready for the next
call.