Over a week after releasing iOS 10.2 final version IPSW file to the general public, and after two pre-release seeds of iOS 10.2.1 for registered developers and public testers, Apple has stopped signing iOS 10.1 and the iOS 10.1.1 which was vulnerable for jailbreak.
It seems like Apple has listned the words from the jailbreak community regrading its exploit that can hack iOS 10.1.1 rather than iOS 10.2, and then, decided to stop signing both the previous versions of iOS 10.1/10.1.1 to make iPhone, iPad and iPod touch device users not able to downgrade iOS 10.2 to iOS 10.1.1 fortunately.
Here’s what exactly means for jailbreak. iOS 10.1.1, is no longer being signed by Apple. With a jailbreak being apparently imminent, next step?
Apple makes the most current release of iOS 10.2, the only firmware version that can be installed on iPhones and iPads. If you already upgraded your devices to iOS 10.2, downgrading it to previous versions of iOS is impossible now unless you took precautions otherwise.
This move by Apple is indeed a significant one given the fact that a new jailbreak for iOS 10.1.1 by Luca Todesco based on Google’s Project Zero exploits is on the horizon. Now, with Apple decision not to sign that particular version of iOS anymore, the vast majority will be unable to install it on their devices, ready to be jailbroken. If you are already running iOS 10.1.1, then you are in safe hands, only thing you should take a note is not to upgrade your iOS devices to the iOS 10.2.
If you are jailbroken on iOS 9.3.3 and saved your SHSH2 blobs, then, now is the time to recline in your chair and afford yourself a smug grin. How? Those saved SHSH2 blobs will soon let you upgrade to iOS 10.1.1 once Prometheus tool is available even with Apple no longer signing that firmware. That tool also helps you to downgrade to iOS 10.1.1 using it on a device which is already jailbroken.
Of course, if you didn’t save SHSH2 blobs in time when Apple was still signing iOS 10.1.1, you are out of luck now as you can no longer save those blobs for unsigned firmware and that’s the fact.
Apple’s next step belongs to kill all iOS versions prior to iOS 10.2, due to the upcoming jailbreak for older versions of iOS as well as a requirement to plug as many security holes as possible by forcing users onto newer versions of the iPhone and iPad operating system. For those individuals who don’t care about jailbreaks, this move by Apple will never be a big matter, but to those who jailbreaks and waiting for that, today’s developments could be disturbing.
As always, we will keep you updated on all the latest on jailbreak front as soon as we get to know more. Stay tuned.
Update: Earlier version of this article didn’t clearly mention jailbreak being a requirement when downgrading from iOS 10.2 to 10.1.1 using Prometheus. This has now been rectified.
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