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To Apple enthusiasts, it’s hard to imagine that someone might go more than a year or two without upgrading to the latest and greatest iPhone.
With new plans from AT&T, Verizon, and Apple itself that make it easy (if perhaps not cost-effective) to trade in your iPhone for a new model every year, many gadget lovers are well-equipped to always have the newest iPhone. But many, many people — a majority of iPhone owners, in fact — do not upgrade every year, or even every 15 months, according to data released by Apple CEO Tim Cook on this quarter’s conference call.
In fact, only 40 percent of iPhone users who — deep breath for caveat — owned an iPhone the day before the iPhone 6 was released in September 2014, have upgraded to one of the…
