There is currently an untethered Jailbreak available from The iPhone Dev team for iOS 4.2.1 devices but it requires that you have SHSH blobs on file for iOS 4.2b3, which basically means that if you’re not an iPhone developer or don’t have access to a developer account, it’s not for you. Now the Chronic Dev-Team is working on their own untether for the iOS 4.2.1 jailbreak that will not require iOS4.2b3 SHSH blobs, according to tweets made yesterday by p0sixninja.

The conversation thread went something like this:

A lot of people are saying another tethered jailbreak is pointless, I agree. Focusing on getting untethered before release

@p0sixninja I assume you are talking about Greenpois0n? Are you implementing Musclenerd’s untether or do you have your own?

@tahu363 we’re implementing our own

@p0sixninja I’m assuming “your own” will require 4.2b3 shsh? And thanks for your guys work!

@Capsfanchad lol no

This Jailbreak would allow anyone, not just those with developer access, to Jailbreak their iPhones and iPads on iOS 4.2.1.

The Chronic Dev Team aren’t the only ones working on a new untethered Jailbreak for iOS 4.2.1, Comex is also working on his own untether which has yet to be released.

P0sixninja