saurik additionally has explained how the device works:
Impactor makes use of the firmware records supplied through Apple for its “over the air” update function. These information are ~2GB massive, so Impactor is going to excessive lengths to reduce the volume of knowledge it wishes to obtain: so much recoveries would require not up to 10MB of switch.Please notice that Cydia Impactor is recently in beta and is to be had on Cydia. You will have to take a backup of your software the use of iTunes or iCloud prior to the use of it.
First, the update’s “invoice of fabrics” is when compared towards the information on your software, producing an inventory of adjustments.
Then, all information on your tool which were changed or differently destroyed are downloaded right away from Apple.
In a chain of sparsely calculated record migrations, all new information are moved to the consumer partition, and all device knowledge is moved again to the device partition.
Up till this aspect, the theory is that no adjustments to your device were made which might be “dangerous”: at any aspect, if Impactor fails/crashes or your tool reboots, you'll be able to simply run it once more later.
Finally, all the staged adjustments to the filesystem are “dedicated”, all consumer knowledge is deleted, and iOS is informed to run its “reset all content material and settings”.
The concept is this “very important window” lasts best the general few seconds of a procedure that lasts for more than one mins.
(That stated, O nonetheless extremely suggest by no means “messing with” the app at the same time as it's operating, and perhaps when you've got a large number of knowledge this may increasingly take longer than A be expecting.)
When the software reboots, it is going to glance because it did while you first became it on; it's going to additionally now not be “jailbroken”: if you wish to have to jailbreak it, you'll want to achieve this the use of a computer jailbreaking device.
This software works with all iOS units except for iPod Touch sixth era...