Credit: Andrew Grush / Android AuthorityTL;DRSpaceX is reportedly planning a Starlink mobile service, setting up a direct challenge to AT&T, Verizon, and T-Mobile in the US wireless market.The company is said to be exploring its own ground-based wireless network.A $17 billion EchoStar spectrum deal gives SpaceX exclusive airwaves to power future direct-to-device and hybrid satellite-cellular services.The cozy relationship between satellite internet and traditional cell carriers is about to face a significant challenge. SpaceX is reportedly preparing for a massive strategy shift that will put it in competition with AT&T, Verizon, and T-Mobile.Financial Times reports that SpaceX President Gwynne Shotwell told investors during an IPO roadshow that the company is actively considering a Starlink-branded retail mobile service for consumers in the US. Even crazier? SpaceX could build out its own wireless network on the ground to support it.