Earlier today, Apple released iOS 4.2, or more precisely 4.2.1. Every time we have a new software update, the questions come back. When can we get a jailbreak? For what models? Tethered? Untethered? Can I unlock? You know the drill.

The Dev Team wrote a blog post a few minutes ago updating us about the status of the jailbreak and unlock for iOS 4.2.1. Here are the most important points:

  • If you care about your unlock, you should not update to 4.2.1, no matter what (wait for PwnageTool to be updated)
  • iPhone 3G, older iPhone 3GS, and non-MC iPod touch 2G will soon be able to be jailbroken. Thanks to a combination of pwnage2 exploit, the arm7_go exploit, 24kpwn, and LimeRa1n, you will get an untethered jailbreak.
  • For users of newer devices (ie. iPhone 4), there is a way to jailbreak but it is a tethered jailbreak (which means you have to plug your iPhone in your computer to kick start if every time you reboot it).
  • Comex is working on method that would untether the iOS 4.2.1 jailbreak but you will need to have your SHSH blobs on file to use it.
  • There is no ETA for an official 4.2.1 jailbreak to be released.
  • An unlock for the iPhone 3G and 3GS will probably be available this week be available this weekend, once RedSn0w and Cydia have been updated and released.
  • There is no sign of an iPhone 4 unlock for iOS 4.2.1 at this time, which is why you should not update to 4.2.1 without using PwnageTool to preserve your baseband.

UPDATE: RedSn0w for iOS 4.2.1 has been released. Here is the tutorial.

Anything else, feel free to ask in the comments.

  • The Dev-Team in my experience have always posted, as well as countless other websites, “Before updating any iDevice, make sure you read AND understand how the particular update will affect your current jailbrake/unlock or your future ability to jailbrake/unlock.” This info can be found all over the Internet and even on YouTube if your to lazy to actually read.

  • vonkien

    when can 4.2.1 version Iphone 3GS can be jailbreak? or any solution to downgrade the version? i keep trying but cant success…sad