MIAMI--(BUSINESS WIRE)--On the heels of recent LTE upgrades across the U.S., T-Mobile (NYSE: TMUS) today announced that Miami, FL is the latest area to get up to a 50% increase in LTE mobile speeds from a Wideband LTE upgrade. In addition to the greater Miami area, LTE customers in the Ft. Lauderdale and Pompano Beach areas are also experiencing super-fast download speeds, making access to their favorite mobile content seem almost instantaneous. In December, T-Mobile customers in the Miami area