Renting a router from your internet provider is the easier option, but a little extra legwork will save you in the long run.

New and Existing Xfinity Internet Customers Can Now Get a Line of Unlimited on Xfinity Mobile Included for a Year ...

Speeds may vary. Equipment fees: AT&T Fiber does not have additional fees for a modem or router. An Xfinity equipment lease costs $15/mo. or more, though this fee is waived for the first 12 to 24 ...

Comcast heavily promotes the millions of hotspots it provides across the country. However, it does not make a point of telling everyone that it is the customers' equipment providing all this service.