Shortly after the iOS 9.2 to iOS 9.3.3 jailbreak, PPHelper, was released, Apple patched it with iOS 9.3.4. That update was released only to kill off the jailbreak and users were urged not to update or they risked losing their jailbreak. That is most definitely true now that Apple has stopped signing iOS 9.3.3 and you can no longer downgrade. Now, iOS 9.3.5 download [ext link] has been released to patch up a serious issue regarding spyware that has the potential to compromise the data on your iOS device and all users were urged to update to fix the issue. That meant, for anyone who did update, they could no longer jailbreak and could not downgrade.
Image : Prometheus Tool can Downgrade iOS 9.3.5
At one time, we would have used a package called TinyUmbrella. This was developed to help us save our SHSH blobs whenever we updated our firmware so that, should the need arise, we could Downgrade iOS 9.3.5 to iOS 9.3.2 [ext link] that can be jailbroken using PPHelper. Right now, the developer of TinyUmbrella [ext link] is working on a new version of the tool and it cannot be used to save SHSH blobs at the moment. However, we do have the possibility of a new tool to use in the future.
Today, iOS hacker and developer, @tihmstar [Twitter], uploaded a video that showed off his new utility called Prometheus. Although this is still in the early development stages, the video did show an iPhone 5S being successfully downgraded from iOS 9.3.5 to iOS 9.3.2 with Prometheus, giving us a future hope to cling to.
Video : Prometheus Tool in action
Right now, we don’t have enough information on the tool to tell us what we need to use Prometheus. With the utility being in the development stages, all we know at the moment is that it will use APTickets, which are similar to SHSH blobs in that they can be used to downgrade iOS version. Like SHSH blobs, this is dependent on the APTickets being saved every time you update your firmware. There will be other conditions to the utility but the developer has not yet finalized these and cannot tell us what they are at the moment.
To be truthful, the public release of Prometheus is a going to be some way off so don’t bank all your hopes on using it now or in the near future. It is going to be a complicated tool and the developer will need to issue guidance on how to use it properly. However, if we ever do see Prometheus as a public release, it will be a godsend to jailbreakers everywhere and it will be the first downgrade tool that supports 64-bit devices.
Image : Prometheus Installer Concept
At the moment, our advice is simple – if you are using PPHelper jailbreak, do not update your device. The next jailbreak is not expected to be until iOS 10 now and updating will cause you to lose your jailbreak and the ability to install it again.