what's comcast xfinity usual speed
XFINITY Internet: The Fastest Broadband Speeds to the Most American Homes. Our fiber-based network is one of the largest in the country, and we keep making our broadband service faster. In fact, over the last nine years, Comcast has boosted its available broadband speed seven times, from 1.5 Mbps then to todayâs incredibly fast 305 Mbps. We never stop working to meet our customersâ need for speed.