I have one TV on one TV box. I want to add a TV. What do I need?
depends on your needs. If you have a live cable run you can get another set top box (monthly rental). Or you can use an authorized partner device like a current model Roku device using your own wifi (but not your data that counts toward a CAP if any) using the Xfinity stream beta channel (no monthly rental). If you have an xb3/xb6/xb7 rented Xfinity gateway/modem you could also get an xi6 set top box that connects via wifi. the data used by the xi6 for numbered channels and regular on-demand will not count toward your CAP (if any).