Clearwire Corporation, through its subsidiaries, provides fourth generation (4G) wireless broadband services in the United States. The company builds and operates mobile broadband networks that offer high-speed mobile Internet and residential Internet access services, as well as supports fixed voice over Internet protocol services. It provides retail services under the CLEAR brand in 4G markets; and under the Clearwire brand in legacy markets. The company markets its products and services directly to consumers, as well as through cellular retailers, consumer electronics stores, satellite television dealers, and computer sales and repair stores. It offers its services primarily in the metropolitan areas of Atlanta, Baltimore, Boston, Chicago, Cincinnati, Cleveland, Columbus, Dallas, Honolulu, Houston, Kansas City, Las Vegas, Los Angeles, Miami, New York, Philadelphia, Pittsburgh, Orlando, Salt Lake City, San Antonio, San Francisco, Seattle, St. Louis, and Washington D.C. The company is headquartered in Bellevue, Washington. As of October 2012, Clearwire Corporation operates as a subsidiary of Sprint Nextel Corp.