Restore a jailbroken iphone without updating
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.
Your reasons for restoring will vary, but one reason people often choose to get rid of their jailbreak is to install the latest (not yet jailbroken) version of i OS.If a tweak you were using has been storing data in an unorthodox place, and you create a backup of this data, when you restore the phone you might never be able to access (or delete) said data again.This might not be a huge amount of data and pose little problem, or it might be a lot of temporary files that eats a good portion of your 16GB i Phone’s memory. Ever made a warranty claim for a phone you had previously jailbroken? If you’re not making warranty claims, you still might want to hold off creating a backup.Jailbroken i OS firmware can run riot accessing different parts of the filesystem usually only reserved for apps and system components.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.
Do this instead: There are a lot of tales online – mainly anecdotal, which comes with the territory when it comes to jailbreaking – that creating a backup of a jailbroken device is a bad idea.
There are a few reasons for this, one of which is that if you’re making a warranty claim it’s possible for Apple to tell that your device was jailbroken once some evidence of the jailbreak has been copied back to the freshly restored phone.
Finally, all of the staged changes to the filesystem are “committed”, all user data is deleted, and i OS is told to run its “reset all content and settings”.
The idea is that this “critical window” lasts only the final few seconds of a process that lasts for multiple minutes.
(That said, I still highly recommend not at all “messing with” the app while it is running, and maybe if you have a lot of data this will take longer than I expect.) When the device reboots, it will look as it did when you first turned it on; it will also no longer be “jailbroken”: if you want to jailbreak it, you will need to do so using a desktop jailbreaking tool.