Apple has released iOS 4.2. Every time we have a new firmware update, a deep stir is created in the jailbreak community. This time, the Dev Team clears the rumors about what can be jailbroken and unlocked.

The Dev Team wrote a blog post notifying 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, 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.

If you have any other queries, please feel free to ask in the comments section below.