I fixed the issue myself. I had to go to the on-line Plantronics manual and find out how to re-'pair' my phone with the Bluetooth device. I selected the Bluetooth option from my phone and selected MORE SETTINGS. On the Plantronics Bluetooth, I kept pressing the call button (the black square button on the device) until it asked me to pair phone. On my cell phone, my Plantronics device showed up as an option and I selected it and it was 'paired' we are now hands free again.