CHART OF THE DAY: Smartphone Penetration Reaccelerates In The U.S.

This chart comes from Business Insider Intelligence, a new research and and analysis service focused on the mobile and Internet industries. Sign up for a free trial here. The U.S. added 31 million smartphone subscribers in the past four quarters. That represents a reacceleration of growth in U.S. smartphone penetration. For comparison, the U.S. smartphone market had added 28 million subscribers in the four quarters leading up to the end 2012. However, this quarter's 12-month growth rate is still...