"Do you regularly use your cell phone to coordinate meetings, solve an unexpected problem, decide which restaurant to eat at, look up the score of a sporting event, check traffic, call help in an emergency situation or find information to help settle an argument? These activities make you a “just-in-time” cell user according to the latest study by the Pew Internet & American Life Project. According to this report, 70% of all cell phone owners in the U.S. and 86% of smartphone owners have used their phones to perform at least one of these activities over the last 30 days."
To go directly to the Pew report: