Sources: SpaceX is in talks with EchoStar to acquire Boost Mobile or access its network, after Verizon, T-Mobile, and AT&T rebuffed requests for network access (Washington Post)

Washington Post:
Sources: SpaceX is in talks with EchoStar to acquire Boost Mobile or access its network, after Verizon, T-Mobile, and AT&T rebuffed requests for network access  —  Elon Musk approached the heads of America's top telecom companies in recent months with a request that would help him fulfill a years-long dream.