How to prepare for a possible iOS 8.3 downgrade

With the imminent release of iOS 8.4 on Tuesday, it may be a good idea to save iOS 8.3 SHSH blobs using TinyUmbrella, so that you have the option to downgrade to iOS 8.3 even after Apple’s stops signing the iOS 8.3 firmware file.

With this in mind, the ability to downgrade back to iOS 8.3 is very desirous for would-be jailbreakers. While there is no confirmed downgrade ability just yet, there are some things that you can do to ensure that you have the best chance to downgrade should that ability arrive.

To save your SHSH blobs and prepare for a possible iOS 8.3 downgrade, you’ll need to use TinyUmbrella to do so. I’ll show you how in this post and video.

  • Download the new TinyUmbrella beta from this link (click on the download link in the right sidebar under Downloads/Links). It is available for both Mac and Windows.
  • TinyUmbrella requires Java installed, so download it from this link and install it on your computer.
  • Launch TinyUmbrella.
  • Now connect your iOS device to the computer. TinyUmbrella should automatically recognize it and begin downloading all of the available SHSH blobs.

TinyUmbrella saves your SHSH blobs into a single file. To find that file, you’ll need to go to the following locations:

Mac: ~/.tu/.shsh

Windows: C:\Users\~\.tu\.shsh\

Answers to Frequently asked questions:

  • TinyUmbrella will automatically download the SHSH blobs for firmware files that are currently being signed by Apple.
  • The SHSH blobs are saved at the following location: ~/.tu/.shsh. You can check the folder to see if it has been saved.
  • Unlike the previous version, all the SHSH blobs are saved in a single file.
  • There are three types of SHSH blobs namely: Update (Restore), Erase (Restore) and OTA. We’re assuming it is meant for different types of actions.
  • TinyUmbrella keeps a record of the known devices in ~/.tu/.known_devices folder. If you can delete the file in that folder if you want to clear the history.
  • It is important to note here that you won’t be able to downgrade currently though Semaphore seems quite bullish about the ability of downgrading in the future. We’ll let you know as soon as we get any further updates.
  • You can’t use SHSH blobs of another iOS device. SHSH blobs are unique for a device, so it is important to download the SHSH blobs for your device.

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