BELLEVUE, Wash.--(BUSINESS WIRE)--T-Mobile US, Inc. (NYSE: TMUS) today provided a preliminary view of key customer results for the fourth quarter of 2014, once again demonstrating the strength of the momentum and positive customer response to its Un-carrier initiatives. “We continued to take share from our competitors and attracted 8.3 million net customers in 2014 who were looking for value, simplicity and transparency,” said John Legere, President and CEO of T-Mobile. “While my competitors ar