Nov 22 2010
The latest update for iOS – 4.2.1 just went live. You can update your iPhone/iPad/iPod via downloading the update from iTunes or from the direct links below :
Keep in mind that you will lose all jailbroken apps and unlock. If you have a Jailbroken device I strongly suggest you wait until a proper untethered jailbreak has been released for iOS 4.2.1.