Xfinity is a division of Comcast Corporations, a parent company. How long does it take to install Xfinity? Installation generally takes two to four hours and is performed by an Xfinity technician.

With Xfinity, professional installation typically costs $100, but you don't have to "qualify" for the self-installation option like you do with AT&T. However, the self-installation option will ...

Xfinity does let you bypass this additional cost by selecting self-install, meaning it'll ship you a Getting Started kit, and you can activate the service on your own using the Xfinity app.