Amongst iPhone buyers selling or giving away old phones, 49 percent of the used devices are actually earlier iPhones, suggests Consumer Intelligence Research Partners. In a recent survey of iPhone 4S buyers, CIRP found that 53 percent of them were handing off an older phone for money or as a gift. Older iPhones dominated trades in that group, with BlackBerry and Android smartphones trailing behind at 21 and 15 percent, respectively. "Other" phones represented only 15 percent.
