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TV, Internet, voice, security and cellular services from Comcast, Philadelphia, PA, Branded Xfinity in 2010, for decades Comcast was known for its cable TV service, which began in 1963 as American Cable Systems. Because the same coaxial cable that brought TV into the home and office is also used for Internet access, Xfinity became the largest ISP in the U.S.

Also part of Comcast are NBC and Telemundo TV, as well as cable channels MSNBC, CNBC, USA Network, NBCSN and E!; however, they are not associated with the Xfinity brand.

Xfinity Services
X1 is the current Xfinity cable TV platform and interface, and Xfi is Comcast's mesh Wi-Fi service, which distributes a hotspot throughout the home or office. Xfinity voice offers landline telephone service to the analog phones in the house by converting the digital signal to analog. Xfinity Home provides in-home security monitoring, and Xfinity Mobile is cellular service.

Xfinity Mobile
In 2018, Comcast introduced its cellular service as a bonus to Xfinity customers. Riding on the Verizon network, Xfinity Mobile charges customers per gigabyte of cellular data but does not charge a fee per phone line as do all other cellular providers. In addition, Xfinity Mobile customers automatically connect to the millions of Xfinity hotspots in public venues as well as in homes with Xfinity routers that have the default guest access turned on. See Xfinity hotspot.
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References in periodicals archive ?
Comcast has announced new By the Gig Shared Data options on Xfinity Mobile that give customers the flexibility to choose how much data they need and share it across all lines on their account -- offering individuals, groups or families even more ways to customize their mobile plans based on their unique data needs, the company said.
ALGONQUIN Comcast announced plans to open an Xfinity Store at 2104 S.
The Leading Free Streaming Television Service in the U.S Debuts 100+ Live and Original Channels and Thousands of Iconic Movie and Television Titles to Xfinity X1 Customers
Comcast has begun offering the Samsung Galaxy A50 to Xfinity Mobile customers.
Comcast announced the launch of Xfinity Flex, a new service that provides Xfinity Internet-only customers the ability to use their television and voice control to manage all of the connected devices in their home, and enjoy many of their favorite entertainment experiences on the big screen.
Prime Video service has debuted on Comcast's Xfinity X1, giving millions of people access to a one-of-a-kind entertainment experience that now features seamless access to award-winning Prime Video originals, thousands of premium shows, movies, and live events right alongside all of the live, on demand and web programming included with an Xfinity TV subscription.
Digital measurement of Comcast's Xfinity Stream app and web portal is coming from Nielsen .
Xfinity Stream App for Business Includes Access to Live TV Across Devices; Perfect for Waiting Rooms, Employee Break Areas, and Lobbies
Global Banking News-August 3, 2018-Comcast and Amazon partner to launch Amazon Prime Video on Comcast's Xfinity X1
With Xfinity xFi, parents can now assign a specific time allowance for WiFi usage; survey finds children spend more time on devices during the summer and parents want better tools to monitor access at home