MuscleNerd, the popular iPhone Dev team developer, has uploaded aof untethered iOS 4.2.1 jailbreak. This video suggests that Dev have found out the technique to provide untethered jailbreak facility to the iDevices.
Here’s the video of untethered iOS 4.2.1 jailbreak –
Got “backup plan” for untethered 4.2.1 JB working (video coming up). Uses mysterious 4.2b3 hasheskept for you(It’s a “backup plan” because comex is working on a more extensible one, but this method is also generalizable)ipt4g 4.2.1 untethered JB w/4.2b3 kernel: http://is.gd/inE4e … Wastes no exploits, but upcoming @comex JB maybe better
As mentioned by him, Comex is also working on another untethered jailbreak, which can be used on iOS 4.2.1 devices. So, now there is no need to worry about the untethered jailbreak. If you still want to jailbreak iOS 4.2.1, you can use Redsn0w 0.9.6 Beta or PwnageTool to achieve tethered jailbreak.
More updates coming soon.
Must Read – Untethered iOS 4.2.1 Jailbreak by MuscleNerd