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.

Xfinity fiber-powered internet results in 99.9% network reliability. Combined with low-lag technology and unlimited data, it delivers consistent performance even during peak household usage.

According to the San Francisco Chronicle, Xfinity customers saw brief dropouts shortly after 9 AM, with reports stretching from the North Bay to the Peninsula, East Bay and South Bay. The Chronicle ...