<ul><li>FCC Chairman Brendan Carr threatens to revoke EchoStar licenses for spectrum desired by SpaceX due to alleged underutilization.</li><li>Carr has ordered a review of EchoStar's compliance with providing 5G service across the US as per its spectrum licenses.</li><li>EchoStar Chairman Charles Ergen defends company's wireless deployment but acknowledges uncertainty in FCC proceedings' outcome.</li><li>EchoStar's stock price dropped approximately 8 percent in response to the developments.</li></ul>

FCC threatens EchoStar licenses for spectrum that SpaceX wants to use

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