SEATTLE, Jan. 25 /PRNewswire/ -- A new mobile measurement firm, Ground Truth™, today announced it has launched the first mobile measurement service to use census-based measures of actual Mobile Internet usage from millions of mobile subscribers in the United States. The company, which is backe
Source : http://www.prnewswire.com/news-releases/ground-tru...
Source : http://www.prnewswire.com/news-releases/ground-tru...