Comcast Delivers New Ultra-Fast Speed Tiers - 8Mbps and 6Mbps

Comcast is Twice as Fast as DSL, Delivers Reliable Speed

PHILADELPHIA, PA - July 12, 2005 - Comcast, the nation's Number One broadband provider, today announced it is enhancing its residential speed tiers, introducing new, faster speeds to deliver the ultimate broadband experience - 8Mbps/768kbps and 6Mbps/384kbps.

Since first setting the industry benchmark for speed in October 2003, this marks the third time Comcast has raised broadband speeds for its customers. Comcast has increased its downstream speeds more than 400% in less than two years, and has built a network that has virtually unlimited capacity to deliver higher speeds.

The speed upgrades will begin this month in eastern and central Pennsylvania, New England, New Jersey, Maryland, Michigan and Washington, D.C., with nearly all Comcast markets scheduled to be complete this summer. The speed increases will be automatic, which means customers are not required to download any special files or upgrade their connections.

"Comcast offers customers a fundamentally better Internet experience. Our service is fast, reliable, easy to use, and packed with great features and value," said Steve Burke, President of Comcast Cable and COO of Comcast Corporation. "Our new 8 and 6Mbps speeds are ideal for anyone living in the Comcast network - from the mainstream broadband user to the dial-up customer looking to switch to something faster."

Comcast focuses on adding value every time its more than 7.4 million High- Speed Internet customers connect to the Internet or log onto Comcast.net. The new 8Mbps and 6Mbps downstream speeds will allow customers to instantly access their favorite content and features on Comcast.net - communication, games, kids, movies, music and sports. Because of the new ultra-fast connection speeds, Comcast customers will more easily be able to:

• Share photo slideshows with music via Comcast PhotoShow Deluxe
• Send video greetings with Comcast Video Mail
• Stream online music or download songs from the Comcast.net Music Channel
• Download online games and experience better game play with Comcast Games on Demand.
• Comcast is delivering the faster 6Mbps speed to customers who also subscribe to its Standard or Digital Cable services* at no additional charge. These customers also will also have the option of jumping to the faster 8Mbps for only $10 more per month.

About Comcast

Comcast Corporation (Nasdaq: CMCSA, CMCSK) (http://www.comcast.com) is the nation's leading provider of cable, entertainment and communications products and services. With 21.5 million cable customers, 7.4 million high-speed Internet customers, and 1.2 million voice customers, Comcast is principally involved in the development, management and operation of broadband cable networks and in the delivery of programming content.

The Company's content networks and investments include E! Entertainment Television, Style Network, The Golf Channel, Outdoor Life Network, G4, AZN Television, PBS KIDS Sprout, TV One and four regional Comcast SportsNets. The Company also has a majority ownership in Comcast-Spectacor, whose major holdings include the Philadelphia Flyers NHL hockey team, the Philadelphia 76ers NBA basketball team and two large multipurpose arenas in Philadelphia. Comcast Class A common stock and Class A Special common stock trade on The NASDAQ Stock Market under the symbols CMCSA and CMCSK, respectively.

* Comcast Standard Cable is made up of nearly 50 of the most popular cable networks such as CNN, Fox News, CNBC, MSNBC, ESPN, Discovery, History, The Learning Channel, and more. Comcast High-Speed Internet customers who do not subscribe to a Comcast standard programming package, can opt for the faster speeds of 6Mbps/384kbps for $10 more per month or they can select the 8Mbps/768kbps tier for $20 more per month than they are currently paying.