Updated: Jailbreak Users can Unlock iOS 4.2.1, TODAY

By on Nov 28, 2010 at 3:52 pm

Pay attention Jailbreak users! If you have a jailbroken phone and haven’t been able to update to iOS’ latest 4.2 version without bricking your phone, the jailbreakers of the world are releasing their own patch this Sunday. Details below:

Update Nov 28: iPhone 3G and 3GS users can now unlock 4.2.1 via the PwnageTool.

If you want to learn how to jailbreak your phone, click here.

With Turkey Day a few days off, today Apple publicly released FW version 4.2.1. As always, ultrasn0w unlockers please stay far far away from this official firmware (and all official firmware). Wait for the ability to create custom 4.2.1. IPSWs that don’t update your baseband! If you’re not an unlocker, read on!

The best news of all is for owners of iPhone3G, older iPhone3GS, and non-MC iPod touch 2G. Due to a combination of our original pwnage2 exploit, the arm7_go exploit, 24kpwn, and limera1n, your device is “just as jailbreakable as ever.” You reap the full benefit of an untethered 4.2.1 jailbreak.

Next are the owners of all the more recent devices. The good news there is that due to geohot’s limera1n exploit, all recent devices can be jailbroken (this will be true until Apple released new hardware that fixes geohot’s limerain exploit in the bootrom). The bad news is that right now, the 4.2.1 jailbreak is *tethered* on all of these recent devices. A tethered jailbreak means that each time your device loses battery power or needs to be rebooted, you must attach it to a PC or Mac to boot into the jailbroken state. @comex is working hard on a method that may untether the 4.2.1 jailbreak, but it will require you to have your 4.1 SHSH blobs in order to use it. No word on how much more effort it will take though (please don’t bug @comex about it!). (We also have an alternative method that may work, but @comex’s method is much more elegant.)

So when does all this 4.2.1 jailbreak action happen? Well if you’re a JB developer or tinkerer, you’ve already probably used the redsn0w mentioned in our last post to jailbreak 4.2.1 and at least get SSH working. But beyond that, there are still some last minute issues with MobileSubstrate and comex’s kernel patches that are being fixed. We’ll tweet and post a blog update when it’s all available (we hate to give ETAs, but barring any unforeseen problems, probably later today).

In the meantime, please make sure you have your 4.1 SHSH blobs for all your devices. These will be important even for firmware beyond 4.1 (using both comex’s method and our alternative, depending on how each of them turn out.)

ultrasn0w unlock: After redsn0w is officially released with the new Cydia and kernel patches, we’ll be able to assess the unlock situation. It’s already looking very promising though, so expect the unlock for the 3G and 3GS to be coming this week. The i4 unlock is taking more effort though, and no further concrete info is available about that yet.

Feel free to ask questions in our comments section below, where we’ve got some awesome new additional moderators — sherif_hashim, dhlizard, and Frank55!

[Redmondpie]

Tags:

Filed: FeaturedHardwareiPadiPhoneNews
  • Zzisel

    Wow, really?? ahaaaaaaaaaaaa I also enjoy my old iphone, it can do many things. The app store is for iPhone users. I think once you Jailbreak an iPhone it is no longer an iPhone. But, in the other side, as the iPhone is far from flawless as Apple created it, thousands of iPhone users have flocked to Jailbreak so as to solve all of the problems. And more Jaikbleak and iphone3G/4 detials in this iphone spot that I would visited everyday. Somethings you want to know, I guess. Overall, the new iphone 4 is more better, I’d like to get one also.

  • Zzisel

    Wow, really?? ahaaaaaaaaaaaa I also enjoy my old iphone, it can do many things. The app store is for iPhone users. I think once you Jailbreak an iPhone it is no longer an iPhone. But, in the other side, as the iPhone is far from flawless as Apple created it, thousands of iPhone users have flocked to Jailbreak so as to solve all of the problems. And more Jaikbleak and iphone3G/4 detials in this iphone spot that I would visited everyday. Somethings you want to know, I guess. Overall, the new iphone 4 is more better, I’d like to get one also. the source: ifunia.com/iphone-column/index.htm

  • Annoy_ken

    I just bought a new iPhone 4 with iOS 4.2.1 already installed…Can I still jailbreak this thing? Cause I don’t have a 4.1 SSH to go back to….

    • Shuaib

      Same here… Pls help..

      • Cuby

        u cant do anything.. just wait for the new jailbreak!

        • Eric

          i waited, now when redsn0w is out it dont work for me, when i jailbreak it cydia stands white and dont work

  • Magpies270

    I stupidly updated my firmware to 4.2.1 on my 3rd gen itouch (I’m new to all of this – so very stupid) and have obviously lost a lot of apps. I have tried restoring old firmware, but that doesnt seem to work. I have tried to do a jailbreak with redsn0w and it looked like it worked, but the cydia file is white and doesnt open, is that what is supposed to happen at this stage, sorry to sound so stupid!

    • Sdf

      redsn0w’s jailbreak is tethered, it can only boot up when you’re connected to your computer

    • Katharsysdesign

      re-jail-break

  • Finally!

  • So, I just came across this site because after wiping/restoring my 3GS (it had some pesky stuck podcasts) I discovered that without a SIM card, I can’t use my phone at all. I’m currently living in South Korea and sent my SIM card home a few weeks ago for my lil sis to use until I make it back stateside. GODDAMMITSOMUCH. Anyways, I was wondering does the iphone have to be activated to install/use redsnow? I bought the phone on the first week the 3GS came out so does that mean it has the older bootrom (and can be used untethered) or did that get upgraded when I wiped and installed the newest OS and now need to use tethered mode? Thanks in advance to anyone who can help with my noobish questions.

  • thank u !!—- work for me— finally ios 4.2.1

  • Anonymous

    how do i jailbreak ios 4.3.1