The mobile industry just witnessed a major leadership shake-up that's bound to reshape one of America's biggest wireless carriers. T-Mobile confirmed that Mike Sievert will step down as CEO on November 1, 2025, with current COO Srinivasan Gopalan taking the helm. This is not just another corporate reshuffle, it signals T-Mobile's shift from aggressive customer growth to premium positioning built on robust fiber infrastructure. The timing stands out, Sievert's contract was set to run until 202...