Is there a universal 4 digit pin code for a Plantronics Voyager bluetooth headset?

No, there is no universal 4-digit PIN code for Plantronics Voyager Bluetooth headsets. Typically, the default PIN for pairing is either "0000" or "1234," but it can vary by model. It's best to refer to the user manual for the specific headset model for accurate information. If these codes do not work, resetting the device may be necessary.