United States, Feb. 21 -- Strike three or ball four T-Mobile announced that as the official wireless partner of MLB, the Un-carrier is powering the debut of MLB's automated ball-strike system (ABS) at the major league level for the first time with a private 5G Advanced Network Solution (ANS). The 5G-powered ABS system will be featured during spring training games at Steinbrenner Field in Tampa, Florida, beginning Feb. 21. T-Mobile also announced that it's bringing back one of its most popular perks - free MLB.TV - for customers starting March 25, just in time for MLB Opening Day.5G-Powered ABST-Mobile's 5G-powered ABS system will be tested for the first time at the major league level following trials over the last two years at select minor ...