The record quarterly sales Apple announced Tuesday night were boosted in a big way by repeat customers – existing iPhone owners accounted for 43% of all sales of the new iPhone 4S, according to new research. And many recouped much of the cost by selling their older models.

Only 36% of iPhone 4S buyers switched from a rival smartphone operating system, while 43% upgraded from an older iPhone, according to Consumer Intelligence Research Partners. Among those who bought in the first few weeks after the launch, about 70% were iPhone upgraders, says Michael Levin, a co-founder of the firm. In fact, in October and November, Apple claimed the top three spots among the top 10 smartphone models sold with the 4S, iPhone 4, and 3GS, according to research by the NPD Group, a market research firm. And consumers are clearly willing to play along with the upgrade cycle: About half of new smartphone buyers had owned their previous phone for two years or less, according to NPD Group.
People sure do love jailbreaking their iOS devices. In fact, after Friday’s launch of the Absinthe A5 tool, jailbreaking iOS 5 on A5-powered devices was almost as popular as the iPhone 4S itself when it first launched.
Nearly 1 million people jailbroke their iPhone 4S or iPad 2 between Friday and Monday, according a blog post from the Chronic-Dev Team, who took the lead in developing the untethered solution for jailbreaking iOS 5 on Apple’s newest gadgets.
News of Friday’s launch of Absinthe A5 temporarily crashed the greenpois0n site, as it evidently gave hundreds of thousands of users a fun weekend mini-project. The initial tool was only released for Mac OS X, but a Windows version quickly followed over the weekend.