Recently, Prometheus has been released enabling users to tweak iOS device to any unsigned firmware version. Here are the tips and tricks on how you can use Prometheus on your iOS device.

Hacker Tihmstar has launched the Prometheus tool, which allows users to upgrade or downgrade to any unsigned iOS firmware versions. Prometheus is not a single tool but is actually a set of tools that consist of futurerestore, nonceEnabler and img4tool.

You must have the SHSH2 blobs saved for the unsigned iOS version for the hack to work. With Prometheus, you can upgrade or downgrade iOS 9.x to 9.x or iOS 10.x to 10.x. Even iOS 9.x to 10.x is completely possible. However, the downgrade from iOS 10.x to 9.x is not likely feasible.

Tihmstar pointed out that Prometheus only works on 64-bit devices. Furthermore, support for the iPhone 7 and iPhone 7 Plus is possible; but support for iPhone 7 and iPhone 7 Plus is broken. The tool is available for Mac as of this writing. On the upside, Tihmstar plans to release Linux and Windows versions soon. The tool works for both jailbroken and non-jailbreak devices.

There are two ways to use Prometheus depending on whether your device is jailbroken or not. The first method entails a jailbreak and SHSH2 blobs saved with a generator. This method more reliable and is faster. The process utilizes nonceEnabler and futurerestore together. The second method, on the other hand, only uses futurerestore, and does not require a jailbreak. This method requires the SHSH2 blobs saved with a specific nonce and generator is not necessary.

The first video details how you can use a jailbroken device to set a definite nonce. As soon as you manually set the specific nonce, it will match the generator in the SHSH2 blobs saved and the restore will be accepted without any issues. This video will let guide you on how to set the nonce with nonceEnabler. Once the device goes into recovery mode, jump to the second step.

On the other hand, if you have a non-jailbroken device, you may follow the video. The nonce collision method is a slightly less reliable and may take longer time, according to ValueWalk.