The latest iPhone controversy comes courtesy of a grade-school math problem: If Apple reports that 4 million iPhones have been sold, and AT&T reports that 2 million iPhones have been activated with AT&T accounts, and current estimates peg iPhone sales in the UK, Germany, and France in the neighborhood of 350,000 to 400,000, and if 20 percent of all iPhones sold are hacked and unlocked, how many iPhones are left unaccounted for?

>> Apple Minus AT&T Equals Lots of iPhones Somewhere Else