AT&T Invests More Than $3 Billion Over Three Year Period To Enhance Local Networks In Illinois

SPRINGFIELD, Ill., April 20, 2015 /PRNewswire/ -- AT&T* has invested more than $3 billion in its best-in-class wireless and wired networks in Illinois between 2012 through 2014, driving a wide range of upgrades to reliability, coverage, speed and performance for residents...