If you are looking to avoid equipment fees or connect an older TV, consider these options:

No, you cannot effectively buy your own digital adapter for Comcast to use as a primary device . While you can find hardware for sale through third-party resellers like eBay or Amazon , Xfinity no longer supports or issues these TV Adapters as of early 2025. Core Issues with Buying Third-Party Adapters

Digital Transport Adapters (DTAs) are designed only for standard channels and do not support premium content, On Demand, or DVR features. Community Feedback

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.