No bluetooth headset I Know of supports PTT. I have the Jabra BT500 and it works with the DC but you have to Use the PTT button on the blackberry itself. I work For Sprint Nextel and there are no Bluetooth headsets as of now that have a PTT button on them.
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Tuck your chin. You're going to get hurt. Might as well see it coming.
E.H.
Thanks, I did not think so either. I worked for nextel and now for GD, and have used their phone for 10 years. I was not sure if there was an after market product...