need to update box from xg1v3 to xg1v4 so I can use bluetooth?

I have new hearing aids, and I'd like to connect them, via Bluetooth, to the TV. My main box says "XG1-A" on the front, which I think means that it's the XG1v3 model. Bluetooth pairing is not available in the "Settings" menu. I think this means that I need to upgrade to the newer box, which I believe is the XG1v4 model. (My account has DVR and HD.) Is this a correct upgrade? Is there any upgrade that would be better/newer? How would I go about getting a newer box?

Thank you!