DETROIT, March 20, 2015 /PRNewswire/ -- AT&T* has invested more than $1.7 billion in its best-in-class wireless and wired networks in Michigan between 2012 through 2014, driving a wide range of upgrades to reliability, coverage, speed and performance for residents and business...
Source : http://www.prnewswire.com/news-releases/att-invest...