hacker Pod2g of Chronic Dev Team has confirmed that the updated Greenpois0ntool will untether jailbreak iPhone 4, iPhone 3GS, iPod touch 3G, iPod Touch 4G and iPad running iOS 4.2.1 OOB without requiring SHSH blobs for iOS 4.2b3.
Few days back, the Joshu Hill of Chronic Dev Team posted a teaser video showing untethered iOS 4.2.1 Jailbreak running on iPhone 4. Interestingly, last week pod2g of SHAtter jailbreak exploit fame discovered another exploit for untethered jailbreakfor , iPad, iPod touch running on iOS 4.2.1. But most likely it will be used in a new tool to jailbreak iOS 4.3+ or iOS 5.0.
While we’re not sure about the exact status of greenpois0n iOS 4.2.1 jailbreak release, we do know that they are closer than ever. So, please be patient!