The iPhone 1.1.2 firmware update was previously available via manual download, but it is now available to all US customers through iTunes. The update includes a TIFF Exploit patch (meaning jailbroken iPhones will not work), foreign language support, and a custom ringtone section. As always, there are a few things you should know before you upgrade so make sure to educate yourself. This goes for the iPod Touch firmware as well, which was also released today. [MacRumors]