In response, AST SpaceMobile sent its own letter to the FCC on Thursday, calling out SpaceX for allegedly trying to “manufacture a controversy.”

“SpaceX has resorted to hurling unfounded accusations at AST SpaceMobile, a company capable of delivering space-based cellular broadband [device-to-device] connectivity to every American,” the company told the FCC. “AST SpaceMobile respectfully requests that SpaceX refrain from making further inflammatory statements to distract from key MNO [mobile network operator] concerns.”