I want the ability to be able to downgrade my iPhone in the future but found out that I will need to save my iOS 6.0.1 SHSH blobs, and then stitch them somehow with Redsn0w. I'm pretty much a beginner with all this jailbreak stuff, so any help would be great.
Submitted by: Jason from Ava, Illinois
Hi Jason! A key process in the jailbreak process (which obviously includes the possibility of downgrading to an earlier iOS, if needed) is to save SHSH blobs; in our case, the iOS 6.0.1 SHSH blobs. And there is a great tool to make this happen called TinyUmbrella. In our case, we will use TinyUmbrella 6.0.1.00 to save iOS 6.0.1 SHSH blobs, and this will obviously work on iPhone, iPod Touch and iPad devices.
Next you'll need to know how to create firmware with stitched iOS 6.0.1 SHSH blobs, because in the case of an accidental (or not) update to a later iOS (maybe iOS 6.1) you'll have the option to downgrade to iOS 6.0.1 if you aren't satisfied with it.
So, here is what you need to do in order to save iOS 6.0.1 SHSH blobs using Redsn0w, and stitch it.
How To Save iOS 6.0.1 SHSH Blobs
As the first step, you need to make sure you have TinyUmbrella 6.0.1.00 for the operating system you use, and Redsn0w 0.9.15b3 alongside, with Apple's latest (iOS 6.0.1) official firmware.
So, if you have checked all of the above, connect your iPhone, iPad, iPad mini or iPod Touch to your PC and TinyUmbrella, and choose Advanced. You'll now see the "Save SHSH Directory" line, where you can specify the path you want to save SHSH blogs to using the "…" button. And then, before you click save, just uncheck "Request SHSH from Cydia".
Next, click Save SHSH. Don't forget you can do this only while Apple still signs iOS 6.0.1, which means before the official iOS 6.1 goes live. If you saved SHSH blobs to Cydia, you can download your SHSH blobs from there.
After TinyUmbrella finishes its job, we move to the other tool: Redsn0w. Launch the application and navigate to Extras > SHSH blobs > Stitch. This will allow you to file the iOS 6.0.1 certificate (blobs) for the firmware.
As the next step, select IPSW, choose the official iOS 6.0.1 firmware, click SHSH, and select the digital certificate you created on the earlier step using TinyUmbrella.
The final step: Find a great and safe place to store your custom firmware file. From now on, you can always downgrade to earlier iOS firmware, even if Apple stops signing 6.0.1 SHSH blobs. That's it. I hope this helps!