http://www.readwriteweb.com/mobile/2...-web-study.php
Zokem's January 2011 study looked at over 2,200 smartphone users in both the U.S. and the U.K. Although apps are growing in popularity, they haven't yet become the top usage category on smartphones - messaging is still #1. Messaging, which includes text, multimedia, email, and instant messaging, accounts for 671 minutes of usage per month (active on-screen time).
Meanwhile, apps (maps, gaming, entertainment, productivity, social networking, etc.) are a very close second at 667 minutes of usage per month.
Voice (531 minutes) and Web browsing (422 minutes) are much further behind.
