For Plantronics 3xx the pin is 0000
It depends on what Bluetooth you use.
0000 in most of any heatset bluetooth
You are suppose to create a PIN for your bluetooth connection. Try: 0000 Four zeros, this seems to work for most Dell Mice
0000
0000
Most default codes for bluetooth accessories of any sort are 0000
I am not sure about the exact model you are asking. It will be helpful if you specify this. However standard Bluetooth headset passcode is 0000.
4 zeroes (0000)
Yes through the bluetooth connection. The charge dock is a Apple 30 pin. You can get the 30 pin to lighting adapter for the charge dock to work as well.
I had one of those cheap giveaway bluetooth headsets and I lost the pin#. I used 0000 (four zeros) and this worked as a default. The bluetooth loaded right away on to my razorV3. I've also heard that all eights works on other models.
0000 Is all you need as a pin code to pair.