AT&T has been ramping up its LTE rollouts over the past week in anticipation of Apple’s first LTE iPhone. As AppleInsider reports, AT&T has officially launched LTE in 10 major markets over the past week, including Cincinnati, Philadelphia, Pittsburgh and Seattle. The addition of 10 new markets means that AT&T now offers LTE services in 72 major markets, and the company has promised to add several more big markets such as Denver and Detroit by the end of the year. Read the full story at Boy Genius Report.