iQmetrix, the leading provider of retail management software for the North American wireless industry, today released statistics on Back-to-School mobile phone purchasing trends over an eight-week period from July 23 through September 14, 2012. iQmetrix sampled data from nearly 7,000 independent wireless retailers across the United States revealing year-over-year (YOY) buying trends from 2010, 2011 and 2012. (See full infographic below.)