“A survey of 50,000 U.S. households conducted by iSuppli Corp. in the fourth quarter of 2007 found that iPhone users spent just 46.5% of their time on the device making calls, compared to 71.7% for the typical cell phone user. The rest of the time, they were reading and sending e-mail, browsing the Web and checking out Google Maps, among other tasks.”
Via BtoBOnline.com