PwnageTool is not the only jailbreak to get an update today. The Dev Team also updated RedSn0w to version 0.9.6b3 to jailbreak iOS 4.2.1 GM which was released earlier this week.

It’s important to note that this version of RedSn0w is mostly for developers. If you aren’t much of a technical person, I’d suggest staying away from it. If you plan to unlock using UltraSn0w, you must absolutely stay away from it…

We’ve made some updates to redsn0w to make it easier for jailbreak developers (and tinkerers) to get their programs ready for 4.2.1.  As noted above, the public version of Cydia (and MobileSubstrate too!) is not 4.2.1-compatible.  redsn0w will now let you install your own custom bundles independent of Cydia (the bundle can actually be Cydia if you’ve compiled it on your own).  These bundles can be up to 15MB in size, and should be in the form of a gzip-compressed tar file.

You may download RedSn0w 0.9.6b3 for Mac OSX or for Windows from the Dev Team’s blog. I also suggest you read their entire post and make sure you know what you’re getting into if you want to use RedSn0w to jailbreak 4.1.2 GM.

  • Chico

    Is it iPad compatible?

    Cheers

  • drew

    Can i jailbreak an iphone that requires its original sim card?? can i just skip to jailbreaking?? i updated to 4.2.1 to try and unlock it.now it is even refusing to be activated via a phonebook sim