How to Downgrade iOS without SHSH Blobs [Tutorial]

Part 1: What is Unsigned iPSW & Can I Install Unsigned IPSW

An unsigned IPSW (iPhone Software) is a firmware file that has not been digitally signed by Apple. The signature is a form of verification used by Apple to ensure that only officially approved firmware versions can be installed on iOS devices. When a firmware version is no longer signed by Apple, it means that users cannot install or restore their devices to that version using iTunes or Finder on a Mac.

Apple unsigns the previous iOS as the newer updates are rolled out. As soon as the latest update is released, the older version of the iOS is unsigned and unavailable for the device. This makes it a tricky and challenging task to downgrade iOS on an iPhone. The SHSH Blobs come in handy to rescue iPhone users who are opting to downgrade to the iOS version. It’s a tricky process, consisting of downloading the blobs for your iPhone from the 3rd party website and installing the downgraded iOS version on the iPhone.

Part 2: How to Install Unsigned IPSW without SHSH Blobs

Installing an unsigned IPSW without SHSh Blogs isn’t a big deal as long as you have the right tool. Tenorshare ReiBoot is the professional that allows you to downgrade your iPhone to unsigned IPSW without using the SHSH Blobs.

One of the best things about the Tenorshare ReiBoot is you don’t need to indulge in a complex process to install the unsigned iOS without the SHSH blobs. It lets you downgrade or upgrade the iOS on your iPhone with a one-click process without requiring any technical knowledge. The tool can automatically detect the firmware you chose and downgrade smoothly.

Click the button to install the unsigned IPSW without SHSH blobs:

Watch the step-by-step guide to learn how to install unsigned ipsw on iPhone/iPad/Mac:

• Download and install the Tenorshare ReiBoot on your computer. Launch it and connect your iPhone to the computer using a compatible cable.

  

• Click on the Upgrade/Downgrade option on the home screen. Select the Downgrade option, then click on the Downgrade button to proceed.

  

• The next step is to download the firmware to which the tool will downgrade your iPhone. Select the iOS firmware package, and hit on the Download button.

  

• Once the firmware is downloaded, it’s ready to downgrade your iPhone. Click on the initiate Downgrade button to initiate the process.

  

  Wait for the progress bar to complete, and don’t disconnect your iPhone. Your iPhone will automatically reboot once iOS is downgraded.

  

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Part 3: How to Install Unsigned IPSW with SHSH Blobs

Installing unsigned IPSW (iPhone Software) with SHSH blobs can be a complex process, but it is possible using tools like FutureRestore. SHSH blobs are cryptographic signatures that Apple uses to ensure that only the latest iOS versions are installed on a device. When Apple stops signing an iOS version, you can no longer install it unless you have the SHSH blobs saved for that specific version and device.

Here is a step-by-step guide to installing an unsigned IPSW with SHSH blobs:

• Download the Necessary Files
• Unsigned IPSW: You can get this from various IPSW download sites.
• SHSH Blobs: Ensure these are saved and readily accessible.
• FutureRestore: Download the latest version of FutureRestore.
• Prepare Your Device
• Backup your device data using iTunes or iCloud.
• Make sure the device has enough battery or is connected to a power source.
• Install Dependencies
• Install Dependencies
• On macOS: Install libimobiledevice and usbmuxd using Homebrew.
• brew install libimobiledevice usbmuxd
• On Windows: Install iTunes for the necessary drivers.
• Place Files in the Same Directory
• Move the FutureRestore executable, the unsigned IPSW, and the SHSH blobs to the same directory.
• Open Terminal or Command Prompt
• On macOS or Linux: Open Terminal.
• On Windows: Open Command Prompt or PowerShell.
• Run FutureRestore
• Use the following command format to start FutureRestore:
• futurerestore -t [SHSH_BLOB_PATH] --latest-sep --latest-baseband [IPSW_PATH]
• Replace [SHSH_BLOB_PATH] with the path to your SHSH blob file.
• Replace [IPSW_PATH] with the path to the unsigned IPSW file.
• Follow On-Screen Instructions
FutureRestore will guide you through the process. Your device will reboot several times.

Part 4: How to Install Unsigned IPSW with 3utools

• Download and Install 3uTools. Visit the 3uTools website, download, and install the latest version.
• Download Unsigned IPSW. Ensure you have the correct unsigned IPSW file for your device model.
• Connect Your Device. Connect your iOS device to your PC using a USB cable. Launch 3uTools and wait for it to recognize your device.
• Backup Your Data. In 3uTools, go to “Toolbox” > “Backup/Restore” to backup your data.
• Enter DFU Mode. Follow the on-screen instructions in 3uTools to put your device into DFU mode.
• Flash the Unsigned IPSW. In 3uTools, go to “Flash & JB” > “Import Firmware” and select the unsigned IPSW file. Select the firmware and click “Flash.” Confirm to proceed with the warning.

• Wait for Completion. Allow 3uTools to complete the flashing process without disconnecting your device.
• Restore Your Data. Use the “Backup/Restore” feature in 3uTools to restore your data after flashing.

Part 5: FAQs about Install Unsigned IPSW

1. Can jailbreaking my iPhone or iPad let me install unsigned iOS versions on it without SHSH blobs?

Jailbreaking your iPhone or iPad allows the user to access the system files, customize the settings, and tweak the features and apps that stock iOS doesn't allow. However, jailbreaking can't help the users install unsigned iOS versions without SHSH blobs.

2. What happens if you downgrade to an unsigned iOS?

Installing the unsigned iOS version can bring multiple risks, such as security risks, exposing your device to vulnerabilities, stealing data, and installing malware. Plus, the apps might need to be fixed due to the outdated iOS version.

3. Is it possible to downgrade iOS without any tools?

No, it’s not possible to downgrade iOS without the tools. Downgrading the iOS version on iPhone includes restoring the devices and installing a firmware file via a tool. Tenorshare ReiBoot is the ultimate tool for downgrading/upgrading iOS without hassle.

Conclsion

Attempting to install an unsigned IPSW without SHSH blobs is fraught with challenges and risks. Apple's security ecosystem is designed to prevent downgrading or installing unsigned firmware without the necessary SHSH blobs, primarily to protect device integrity and user data. While some tools and methods might provide a workaround under specific circumstances, they often come with significant risks, including the potential to brick your device. Therefore, it is crucial to proceed with caution, ensure you have complete backups, and consider the potential implications before attempting any of these methods.

For a safer and more reliable alternative, consider using Tenorshare ReiBoot. This powerful tool can help you downgrade iOS without the need for complicated procedures, providing a user-friendly and effective solution for maintaining your device’s health.

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