Apple has released an iOS 6 update only aimed at the iPhone 5.
Apple on Thursday released iOS 6.1.4 which delivers an "updated audio profile for speakerphone". And that's about it: there don't appear to be any accompanying security updates to 6.1.4.
Apple engineers are racing to finish iOS 7 to preview it the company's annual Worldwide Developers Conference this June, according to Bloomberg.
iOS 7, along with the next build of Apple's Mac OS X operating system, are expected to be released at the San Francisco event.