Xfinity will let you rent a modem when you sign up for its Internet service, but you do have the option of using a third-party modem instead. Here's how.

How Much Does Xfinity Home Internet Cost? Xfinity internet plans start at $40 per month for 300 Mbps and speeds go up to 2 ...

The cost of a Comcast-compatible modem, like our top pick, the Arris Surfboard, is more than offset by improved performance and pays for itself in just a few months.

The following shopping guide to Comcast modems provides information on how to choose a compatible model and runs down must-have built-in features like DOCSIS 3.0 and 3.1 and other crucial details ...

The cost of a Comcast-compatible modem, like our top pick, the Arris Surfboard, is more than offset by improved performance and pays for itself in just a few months.

Comcast has largely converted its U.S. network to its high-speed Xfinity service, which relies on DOCSIS 3.0 and 3.1 technology to deliver internet data at speeds up to (and in some places ...