Plantronics voyager pro plus is connected and paired with blackberry tour. when a call is coming in, I cannot answer or hang up the phone from the bluetooth headset.

Make sure that your Blackberry's headset mode is activated. If the headset mode is turned on in the Blackberry menu and settings, you may also need to re-pair the headset to your phone to make sure that it has a good connection. Before running through the pairing process, be sure to totally delete the headset from the Blackberry's menu. You may want the headset turned off for this process.

Once you make your Blackberry discoverable, then put the Plantronics Voyager Pro headset into pairing mode by holding the power button until the headset flashes red and blue. Here is the link below for the Voyager Pro pairing instructions.

Plantronics Voyager Pro Pairing Instructions

Good luck from Headsets Direct!