Can I switch an active call from my Nokia Bluetooth Headset BH-215 to the paired phone without losing the call?

To switch a call from the headset to a compatible phone, on your Nokia Bluetooth Headset BH-215,  press and hold the answer/end key for  about 2 seconds, or switch off the headset.To switch the call back to the headset, press and hold  the answer/end key for about 2 seconds, or switch on the headset.