iPhone 4S users download the most mobile data of any mobile user group, demanding three times as much mobile data as iPhone 3G users and twice as much as iPhone 4 users. Meanwhile HTC Desire S users top the list for uploading the most data via smartphones. According to research by network management software vendor Arieso, consumer demand for mobile data is accelerating faster than predicted, while just 1 percent of all users consume half of the entire downlink data.