T-Mobile US, Inc. (NASDAQ:TMUS) reported its first-quarter financial results after the bell Thursday. Here's a look at the highlights.  The Details: T-Mobile reported quarterly earnings of $2.00 per share, which beat the analyst consensus estimate of $1.89 by 5.82%.  Quarterly sales clocked in at $19.594 billion, which missed the analyst consensus estimate of $19.811 billion by 1.09% and represents a 0.19% decrease from the same period last year. The ...