Today I have a follow up to the video in which we discussed about the fact that you can use Prometheus / FutureRestore to downgrade from iOS 10.3 Beta 1 back to iOS 10.2 and Jailbreak with Yalu if you've saved your SHSH2 Blobs. This is possible because iOS 10.3 Beta 1 (that is still signed) still produces the collisions while generating the NONCEs for the restore, so a NONCE attack is still possible in order to downgrade without Jailbreak. If you did not see the first video about this, I recommend you to see that one first. I linked it down bellow!
We are saving blobs for iOS 10.3 Beta because after iOS 10.3 will be released in a few weeks, all iOS 10.3 Betas will become unsigned and you will no longer be able to downgrade using this method.
The only tool that can save the blobs for iOS 10.3 Beta for the moment is @tihmstar's TSSChecker, but the good thing is that the tool is available for Windows, Linux and macOS (form. OS X).
It is very important to make sure all your blobs are saved correctly. Save them for iOS 10.2.1, save them for iOS 10.3 Beta, save them for every new firmware, you don't know when you are going to need them.
The first video (Watch this first): //goo.gl/SfFT4K
How to save blobs on Windows: //goo.gl/pG8UwJ
Save iOS 10.2.1 Blobs: //goo.gl/dKmVCg
Downgrade Playlist: //goo.gl/8hvHWL