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How to Save iOS 4.2.1 SHSH Blobs Before Jailbreaking iPhone 4 on iOS 4.3.3?

So today I bought my first iPhone 4 and its currently running on iOS 4.2.1 and I m planning to jailbreak it on iOS 4.3.3. But a friend advised that I should save my SHSH Blobs before restoring it to the latest firmware and jailbroke it. So I downloaded TinyUmbrella and try to save iOS 4.2.1 SHSH Blobs. But, TinyUmbrella doesn’t work on my 4.2.1 firmware. After searching the web, I have found out that this is primarily because Apple stops signing iOS 4.2.1 firmware. Can I still jailbreak iPhone 4 on iOS 4.3.3? Any help on this would be greatly appreciated. Thank in advance!

Asked by: Wilmer from Melbourne, Australia

Hello Wilmer, you could still jailbreak your iPhone 4 on iOS 4.3.3 even without iOS 4.2.1 SHSH Blobs. However, you would not be able to downgrade it to previous version of firmware as it requires a saved SHSH Blobs in order to downgrade. Since Apple already stopped signing the iOS 4.2.1 firmware, in your case, I would recommend you to use iFaith SHSH Blobs Dumper to save iOS 4.2.1 SHSH Blobs. Unlike TinyUmbrella, iFaith has capability to backup your SHSH Blobs even Apple stopped singing it.

Step 1: To save iOS 4.2.1 SHSH Blobs, first you will need to download iFaith v1.1 for your Windows machine (iH8sn0w is still working on the Mac OS X version of iFaith at the moment) and run the tool.
Step 2: Then click “OK” after reading the disclaimer.
Step 3: Now, click on the “Dump SHSH” button. Read all the info and click “Proceed”.
Step 4: Click on ‘Let’s Go’ to start the dumping process.
Step 5: iFaith v1.1 will ask you if you are dumping an Apple TV 2, indicate it when iFaith asks you.
Step 6: iFaith will prompt you to put you iPhone 4 into DFU mode. Just simply follow the on-screen instructions to place your device in DFU Mode.

  • Press Power and home for 10 Seconds
  • Release the power button, but keep holding the Home 

Step 7: Once in DFU mode, iFaith will start the SHSH Blobs dumping process of your current firmware. It will go through each step which could take a few minutes.
Step 8: When completed, iFaith will ask you where to locally save the SHSH.
That’s it! You have successfully save iOS 4.2.1 SHSH Blobs. You can now restore your iPhone 4 to iOS 4.3.3 through iTunes and then jailbreak it using Redsn0w 0.9.6rc16 (stable) or JailbreakMe 3.0 (quite buggy).
Save iOS 4.2.1 SHSH Blobs using iFaith

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