Satellite television provides the bulk of EchoStar's revenue. The firm serves about 6 million us customers, about 10% of the traditional television market. It launched an internet-based television offering under the Sling brand in 2015 andserves about 2 million customers on this platform. EchoStar has agreed to sell this business to television rival DirecTV. The firm's focus is now on the wireless market. EchoStar has amassed an extensive portfolio of spectrum licenses and is building a nationwide wireless network. It acquired Sprint's prepaid business and serves about 7 million customers, primarily under the Boost brand. EchoStar's legacy businesses provide satellite telecom services and equipment to businesses and consumers, including about 1 million internet customers.