Saving Blobs

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This will take you through the process of saving blobs which are required if you wish to downgrade to an older, unsigned version of iOS or iPadOS. There are multiple methods below you can try. For unjailbroken devices, you will need to use the “Computer” method.

Saving Blobs with TSS Saver App

  1. Add repo.1conan.com to your sources in your preferred package manager
  2. Download and install TSS Saver
  3. If you’re using unc0ver on iOS 14, download and install libkrw
  4. If you’re using Taurine on iOS 14. download and install libkernrw
  5. Tap “Save Blobs”
  6. Once you receive the confirmation message, tap “Open”

It may take some time for new blobs to appear especially if the server is under load.

You should now have saved blobs for use in the future

Saving Blobs with TSS Saver Website

A12+ Users will need their ApNonce and Generator pair for this method. If you are not jailbroken, follow the blobsaver guide.

Getting Generator and ApNonce (Jailbroken A12+ only)

  1. If you are using unc0ver on iOS 14, install libkrw
  2. If you are using Taurine on iOS 14, install libkernrw
  3. Open a Terminal app and run sudo dimentio > dimentio.txt
    • Alternatively, you can get your Generator and ApNonce from the Generator tab in TSS Saver App
  4. Go to /var/mobile in Filza and open dimentio.txt
  5. Copy the 0x number after Current nonce is at the bottom of the text file as well as the number that comes after entangled nonce:. The 0x number is your Generator, and the entangled nonce number is your ApNonce. Keep these safe somewhere, you’ll need them later
  6. Follow the rest of this guide

Saving Blobs (All Devices)

  1. Connect your iOS Device to your Mac or PC
  2. Open iTunes or Finder
    • Windows users must download the normal version NOT the Windows Store version
  3. Navigate to the device summary page
  4. Click the Serial Number field twice
    • This should change to show your ECID number
  5. Note down this ECID number somewhere where you can read it later
  6. Open the TSS Saver Website
  7. Input your device ECID
  8. Select your Device
    • iPhone 6S, 6S Plus, and iPhone SE users will need to get their board configuration by downloading this app
    • A12+ users will need to input ApNonce and Generator pair
  9. Click Submit

It may take some time for new blobs to appear especially if the server is under load.

You should now have saved blobs for use in the future

Saving Blobs with blobsaver

blobsaver

  1. Download, install, and launch the latest version of blobsaver
  2. Connect your iOS device to your computer and make sure it is unlocked
  3. Click on the first “Read from device” button, which will fill your ECID and device information
  4. If your iOS device is not A12 or higher, you are not required to get an APNonce and you may skip the next step

Get your device-specific APNonce and generator

Make sure your device is connected and unlocked throughout this process.

  1. Click on the second “Read from device” button next to the APNonce field
  2. If you are jailbroken or have a generator/apnonce pair already set on your device you would like to keep, select “Jailbroken”. Otherwise, select “Unjailbroken”

Your device will reboot into recovery mode multiple times. When you reboot into normal OS mode, unlock your iOS device.

If you get stuck in recovery mode, try using the “Exit Recovery Mode” option from the “Help” menu in blobsaver.

These values can be reused at any time to save blobs whether or not you’re jailbroken.

Save Blobs

  1. Once you have filled out all the information, click “Go” to save blobs
  2. You can also click “Save Device” to save your current device’s information, so you can save blobs for it again later

Save blobs automatically in the background

  1. You can also optionally set up blobsaver to save blobs automatically in the background, without having to manually open blobsaver
  2. Once you have one or more saved devices, click “Background Settings” to begin setting it up
  3. Select which devices you would like to save automatically in the background, and blobsaver will first test them to ensure the device information is correct
  4. You can then change the freqency interval blobs are saved at, using the “Change Frequency” button
  5. Once you are ready, click “Start Background” to enable it
  6. You may now close blobsaver, and blobs will automatically be saved in the background at the interval you set

It may take some time for new blobs to appear especially if the server is under load.

You should now have saved blobs for use in the future

Saving Onboard Blobs

Saving Onboard Blobs is the process of saving your previous signature from when you last updated, and converting that into a usable blob. Because you updated while the version was still signed, you can re-use these blobs, and they will still be valid. However, the type of blobs that you save will depend on how you updated to your current version.

OTA Onboard Blobs

If you updated to the version you are saving Onboard Blobs on using the Settings app over-the-air, then the blobs will be “OTA Blobs”. These blobs require a bootrom exploit to be used, and only can be used with the --use-pwndfu argument in FutureRestore.

iTunes Onboard Blobs

If you updated/restored to the version you are saving Onboard Blobs on using iTunes / Finder, then the Onboard Blobs will be saved like normal blobs and you’ll be able to use them. However, they differ according to whether you restored or updated using a computer.

If you restored using a computer, your blobs will be “Erase” blobs, and cannot be used with the “Update (-u)” option in FutureRestore.

If you updated using a computer, your blobs will be “Update” blobs, and can only be used with the “Update (-u)” option in FutureRestore.

Save Onboard Blobs

  1. Add the https://apt.arx8x.net repo to your favorite package manager
  2. Download the Tweak System Info
  3. After downloading System Info, open Settings and navigate to General > About
  4. Scroll down to ECID
  5. Slide left on ECID and tap APTicket
  6. Tap Submit

A popup will appear with the message “APTicket Submitted” once finished. You can now access your blobs on shsh.host

Checking Blob Type

To check what type of blobs you have, use img4tool

  1. Download the IPSW and OTA zip from the internet, then extract the BuildManifest.plist from both of the iPSWs.
    • Google is your friend
  2. Run img4tool -v IPSW_BuildManifest.plist -s blob.shsh2 and img4tool -v OTA_BuildManifest.plist -s blob.shsh2
  3. Scrub through the output and check which BuildManifest img4tool reported a success with.

It may take some time for new blobs to appear especially if the server is under load.

You should now have saved blobs for use in the future