Restore iphone jailbroken without updating
This resets the device back to its original factory settings, without having to update it.
One thing to keep in mind when using this is that it has not been tested and approved by a known jailbreak developer, meaning it MIGHT not be quite as reliable as Cydia Eraser.
This can come in very handy when you want to sell your device, as it allows you to remove the data and all your personal data without having to restore your device.
Since restoring your device would mean installing the latest i OS software update, Cydia Impactor gives you the option to remain at the i OS software update that can be jailbroken, which can be very valuable.
You should take a backup of your device using i Tunes or i Cloud before using it.
Please note that Cydia Impactor is currently in beta and is available on Cydia.
First, the update’s “bill of materials” is compared against the files on your device, generating a list of changes.
Then, all files on your device that have been modified or otherwise destroyed are downloaded directly from Apple.
There are several tools such as i LEX RAT, a command line tool, and Semi-Restore, a desktop tool that allow you to restore your jailbroken device without losing the jailbreak.
But as saurik points out, Cydia Impactor has a different objective.
Cydia will close automatically after the process is finished.