Released yesterday, iOS 6.1.4 fixes a security bug that allowed someone to sneak past the lock screen and make phone calls, listen to voice mail, and view contact photos.
But the update also patched several holes that Evasi0n exploited to perform an untethered jailbreak on all iOS devices, including the latest iPhone, iPad, and iPod Touch. People who upgrade to iOS 6.1.4 will no longer be able to use Evasi0n to jailbreak their devices. And once on 6.1.3, newer Apple devices cannot be downgraded to a previous iOS version.
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