For how to save and restore SHSH2 blob files, see the steps below. You can start saving the digital signature of your current iOS firmware now for possible future use. Online tools like TTS Saver can help with blob saving. Once Apple stops signing an iOS firmware version, the signature is removed, and then, you can't restore the firmware. You must have saved a blob (digital signature) file of the iOS version you want to restore while the version is still being signed by Apple. When Apple stops signing a particular firmware, it removes the sign (signature) from the firmware so users won't be able to downgrade to it. These blob files are the digital signatures that Apple places on each IPSW firmware file for each iOS device. You learned earlier that it is possible to restore unsigned IPSWs with the help of SHSH2 Blobs. You will learn more about these requirements in this blog. To downgrade to a previous iOS firmware that has stopped being signed by Apple, part of the requirements are a third-party restore app, the destination unsigned iOS IPSW file, and its SHSH blob file. Anyone trying to install unsigned IPSW firmware will only get an error message. Usually, when you want to upgrade or downgrade to an iOS version using the IPSW restore file, you will do so through iTunes.ĭuring the downgrade process, iTunes will make some verifications and checks with Apple servers to ensure you are restoring a signed IPSW file. Yes, you can restore your iOS device to an unsigned IPSW firmware, but not in the traditional way. Part 2: Is It Possible to Restore to Unsigned IPSW? To resolve firmware update bugs and issues, reverting to a previous stable iOS version might be the solution. New versions of iOS software often cause unpleasant experiences to device performance and features. iOS users wouldn't be able to use iTunes to restore to an unsigned firmware.Īpple periodically unsigns iOS version because of security issues and encourages users to make use of additions newer updates have to offer. An unsigned IPSW means Apple has stopped supporting the iOS version. IPSW is the file extension of Apple's iPhone mobile operating system. You can download AnyFix for free And get to know it, and if you want to get the advanced features, you can buy the full version with a discount of up to 50%.Part 2: Is It Possible to Restore to Unsigned IPSW?ģ.1 Restore Unsigned IPSW Using SHSH2 Blobsģ.2 Restore Unsigned IPSW by FutureRestoreīonus: How to Downgrade iOS with WooTechy iMaster There is no risk of losing any data on your device. It does not require any specialized knowledge. You may have heard the term recovery mode or (Recovery Mode) in the event that your device crashes for one reason or another, your device may enter this mode, or in some cases you are forced to use it because your device does not respond at all and the reasons for this are many, including that you suddenly may find a black or white screen and the device It does not respond, and sometimes when the system is updated, the device continues to restart or the Apple logo remains fixed when re-opening the device and without any response from you, also some problems such as the inability to update the device, or re-download the operating system with many error messages from the iTunes application, All these problems make you forced to enter recovery mode and then reformat the device.ĪnyFix gets you out of these problems with a quick click. NoteYou can upgrade or downgrade to any version of iOS as long as Apple still allows it. All it takes is just a few clicks of the mouse - no complicated manual operations. Or, you can downgrade to an earlier iOS version as you wish. You can get a sneak peek at the latest iOS beta, even if you don't have a developer account. With the ability of AnyFix to solve the problems of your device, it also offers a great advantage which is the ability to easily upgrade and downgrade the iOS system to the previous version. AnyFix 'Ultimate Mode' can bring your dead device back to normal life.ĭowngrade or upgrade to a newer version as desired What if the device freezes or gets stuck in black / white / blue screen or DFU mode, or even won't turn on? Do not worry. It's easy to return your device to normal. Advanced Mode gives you more power to fix more stubborn issues, such as stuck in the Apple logo, unable to update, unable to restart, etc.
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