Days ago, Apple previewed the latest iOS 10.1. The latest release is iOS 10.0.2 and many people have updated their iPhone 7, iPhone 7 Plus, iPhone 6, iPad, iPod as well as other supported Apple devices. For those who feel regret to do so, you can follow the step by step guide here to downgrade iOS 10 to 9. Alternatively, you can see how a YouTube user perform a downgrade without the need of iTunes using Prometheus Tool. Prometheus Tool is a free application for iOS users to downgrade their operating system from iOS 10 to iOS 10.0.1, iOS 9.3.5, iOS 9.3.4, iOS 9.3.3, iOS 9.3.2, iOS 9.3.1 or earlier iOS 9 versions. This is a free app and no jailbreak is required to use it. As Prometheus Tool is able to downgrade an iOS without iTunes, it doesn’t depends on Apple to sign the firmware. Therefore, you can downgrade any iOS version to any version you want at any time you want, for example, downgrade from iOS 9 to iOS 8.4, from iOS 10 to iOS 7.1.2, or even downgrade iOS 10.0.2 to iOS 9.3.3. This is amazing, isn’t?
In order to run Prometheus, you need APTickets and SHSH Blobs. Prometheus tool is not going to work without any of these tools. Furthermore, Prometheus supports only 64-bit iOS devices such as iPhone 7, iPhone 6S, iPhone 5S and others. SHSH Blobs can be saved from Cydia using a powerful tool called TinyUmbrella. Currently, the developer of TinyUmbrella is working on iOS 10.0.2 thus the downgrade from iOS 10.0.2 to iOS 9.3.3 or any other version is just around the corner. Also, TinyUnbrella works on all kinds Apple devices such as iPhone 7, iPhone 6, iPad mini, iPad Air, iPad pro, iPod Touch and others.
About a month ago, a YouTube user tihmstar has uploaded a video showing how to downgrade iOS 9.3.5 to 9.3.2 on an iPhone 5S using Prometheus. In the video, you can clearly see the entire downgrade process using a MacBook. It took him less than 7 minutes to run the downgrade. Unfortunately, Prometheus Tool is not available for public yet because it involves too many complex development. However, one thing we can foresee is that the downgrade from iOS 10.0.2 to iOS 9.3.3 is possible with Prometheus. All you need to do is to save APTickets just like how you save SHSH blobs using TinyUmbrella.
New teaser video from tihmstar shows downgrading from iOS 9.3.5 may be possible
For those step-by-step downgrade guide, please refer:
- Downgrade iOS 9.3.5 to 9.3.3
- Downgrade iOS 9.3 to iOS 9.2 or 9.1
- How to Downgrade iOS 8 to iOS 7
- Downgrade from Yosemite to Mavericks
When it comes to downgrading an iOS version, our advice is always “Do it as early as possible while you still can”. Stay tuned at CydiaWater for the public version of Prometheus downgrade tool download link. Last but not least, you are welcome to leave a message here in the comment section below if you have tried to use Prometheus tool. We would like to know if someone else has actually used this tool to downgrade iOS 10.0.2 to iOS 9.3.3 successfully.