About using the BlackBerry Wireless Headset HS-500 with a BlackBerry device that is paired with another Bluetooth enabled device
The BlackBerry® Wireless Headset HS-500 connects to your BlackBerry device using two different types of Bluetooth® profiles: A2DP and HFP. The headset plays music and connects to calls when you connect it with your BlackBerry device. If you connect your BlackBerry device to both the headset and another Bluetooth enabled device that uses either A2DP or HFP profiles, A2DP and HFP audio is routed to the headset.