Report: Smartphone traffic will increase 700% by 2015.

"Analyst firm Informa Telecoms & Media calculates that smartphone traffic on wireless networks will increase 700 percent over the next five years. The research firm--which coined a new metric for measuring wireless traffic: ATPU, or average traffic per user--said that although worldwide only 13 percent of mobile phone subscribers use a smartphone, those smartphone customers spend more time on the network and have an ATPU of 85 MB per month."