A new report from mobile advertising network provider InMobi found mobile users are shifting their media consumption and their purchase research and decision-making to mobile devices.

The Q2 2012 study, based on survey data of more than 1,000 U.S. mobile users, found that 59% of users made mobile commerce transactions during a six-month period, compared to just 38% six months before.

“I'm struck at just how rapidly consumers are becoming comfortable making direct purchases on mobile devices,” says Anne Frisbie, the company's North American VP and managing director. “Think back to the late '90s—it took forever to get the majority of consumers comfortable buying on the Internet. In six months we saw more than a 40% change."