Apple has sold more than a million iPhones, but more than a sixth of them may never get hooked up to AT&T, the gadget's exclusive U.S. cell phone service provider. About 250,000 of the nearly 1.4 million iPhones that Apple has sold have gone to customers who don't have any intention of signing up for AT&T's service, Apple Chief Operating Officer Tim Cook said Monday.

Apple COO: Users Unlock 1 in 6 iPhones Sold