Recently leaked plans for an iPhone on Sprint could see Apple add six million more iPhones to its tally in 2012, Piper Jaffray analyst Gene Munster estimated Tuesday. Using Verizon's iPhone activations so far, where 11 percent of all cellphones sold are Apple's, he applied the same proportion to Sprint's own expected performance. Having the one extra carrier could accelerate Apple's iPhone sales expansion from 30 percent next year to 37 percent.
