A wireless alternative often provided at no extra charge for additional outlets.

Compatible with many smart TVs and streaming sticks (like Roku or Fire TV), allowing you to watch live TV without a physical cable box.

“YES you can buy your own box... BUT [Comcast will] tell you no that it is illegal and that you must disconnect it from their line.” Tom's Guide Forum · 13 years ago

While buying a TV adapter is difficult, you can buy your own compatible cable modem to save on monthly rental fees. What's the difference between a TV Box and a TV Adapter?

Xfinity has transitioned to an all-digital platform and now recommends upgrading to X1 TV Boxes or using the Xumo wireless box for additional outlets.

Comcast requires all devices to be activated on their network to function. Many off-market adapters are reported as "useless" by buyers because the company may refuse to activate customer-owned adapters or will still charge a monthly rental fee if they do.