Apple is expected to release the final version of iOS 8.4 shortly, even as the jailbreak community is abuzz with news of various options to downgrade back to iOS 8.3.
The development comes as Apple gears up to close the signing window for iOS 8.3 to discourage further jailbreaking attempts.
Given the imminent release of iOS 8.4, it is imperative that you save your SHSH blobs as they will help preserve the ability to downgrade back to iOS 8.3, in case you accidentally upgraded to iOS 8.4.
Users with iOS 8.3 jailbroken devices and those still planning to jailbreak iOS 8.3 can go ahead and download the latest TinyUmbrella tool for saving SHSH blobs as part of the preparation for a possible iOS 8.3 downgrade.
Here is the complete step-by-step guide to accomplish the task:
Step 1: Download the latest version of TinyUmbrella beta to your computer (Mac and Windows)
Step 2: Download the latest version of Java to your computer, as TinyUmbrella requires it for proper functionality
Step 3: Run TinyUmbrella and then connect your iOS device to computer.
Step 4: TinyUmbrella will automatically detect it and begin downloading the necessary SHSH blobs for the device.
Note: TinyUmbrella saves all your SHSH blobs into a single file. You can find that file at the following locations:
For further assistance, check out the video tutorial below:
[Source: iPhone Hacks]