Many of us have jailbroken their idevices, using Pangu jailbreak tool, or by without using computer web method on safari or by English Pangu tool which uses Cydia Impactor ( previously used to unjailbreak ). Now if you want to come on stock firmware without resetting your idevice or using iTunes restore, here’s a very simple method
The jailbreak from your device you need to restore using iTunes, but thanks to Cydia tweak Eraser, you can avoid this hassle.
Eraser is a Cydia tweak made by Saurik, the creator of Cydia. With this simple application, you can remove the jailbreak from your device without having to erase or restore from iTunes.
The tweak has just been updated to support the jailbreak of iOS 9.2 versions up to 9.3.3. In this way you can erase the traces of the jailbreak, staying on the same version of the operating system and so, maintain the possibility to redo the jailbreak.
If you want to restore your warranty, suspended because of the jailbreak, it is always recommended to perform a full restore in DFU mode using iTunes.
How it works
Cydia Eraser appears to take advantage of the OTA update system. Saurik explains how it works in Cydia, and we’ve included the excerpt below:
Eraser uses the firmware archives provided by Apple for its “over the air” update feature. These files are ~2GB large, so Eraser goes to extreme lengths to minimize the amount of data it needs to download: most recoveries will require less than 10MB of transfer.
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.
In a series of carefully calculated file migrations, all new files are moved to the user partition, and all system data is moved back to the system partition.
Up until this point, the idea is that no changes to your system have been made that are “unsafe”: at any point, if Eraser fails/crashes or your device reboots, you can just run it again later.
Finally, all of the staged changes to the filesystem are “committed”, all user data is deleted, and iOS 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.
How to Remove Jailbreak ( un-jailbreak iOS 9.2 to iOS 9.3.3 )
Let’s start by launching the Cydia app.
Step #1: Using the Search tab, look for “Cydia Eraser“
Step #2: Tap Install > Confirm > and Respring.
After that, there is now a new app on your home screen. Open up Cydia Eraser and let it do all the work for you.
Does it safe for warranty :
So many people might think its safe to un-jailbreak your device using cydia eraser, and its safe for apple warranty. If you have any problems in your iPhone or iPad it should be restored using iTunes so that all the linked files will be deleted and you can opt for replacement if it’s in warranty period.