Clearwire, Comcast and Sprint today announced plans to launch their respective 4G mobile Internet services to additional cities in the summer of 2010. Each of the companies will offer 4G under their own brand.

The companies plan to launch 4G mobile broadband services this summer in the following cities: Jacksonville and Daytona, Fla.; Kansas City, Kan.; Nashville, Tenn.; St. Louis, Mo.; Salt Lake City, Utah; Merced, Modesto, Stockton and Visalia, Calif.; Wilmington, Del.; Grand Rapids, Mich.; Eugene, Ore.; and Yakima and Tri-Cities, Wash.

Clearwire’s 4G service is branded CLEAR. Comcast’s 4G service, branded Comcast High-Speed 2go, is sold as part of a Fast Pack that bundles in-home wired Internet with wireless Internet. Sprint’s 4G service is branded Sprint 4G.

According to a press release, the 4G mobile broadband service is available today in 32 markets covering 41 million people. Services are offered by Clearwire and Sprint in each market, as well as Comcast in select markets. By the end of 2010, Clearwire’s 4G mobile broadband network is expected to be available to up to 120 million people across the United States.