In a rare interview, Apple Senior VP of Worldwide Marketing Phil Schiller revealed research from Apple that showed that customers switch to the iPhone from Android at about four times the rate they go the other way. He also pointed out the problem that platform fragmentation in Android -- where the vast majority of users are running very outdated and insecure versions of the OS, and cannot upgrade without buying a new device -- and the overall poorer user experience, on the eve of Samsung's introduction of the Galaxy S4 smartphone.