Update #1: notcom has released TinyUmbrella 4.00.32, download from Here.
TinyUmbrella has been updated to support iOS 4. In simple words, you can now downgrade your iPhone 3GS and ipt3g firmware from a future version of iOS. Make sure that you backup your SHSH blobs.You can now save your iOS 4 SHSH regardless of whether your iDevice is jailbroken. See the download links to the right.
Tested this with iTunes > 9. (Up to and including 9.2)
- iPhone 3GS
- iPod Touch 3G
- iPod Touch 2G
- iPad (No changes as 4.0 hasn’t been released for iPad)
If you have an iPhone 3G you don’t need to save your SHSH.
What’s ECID SHSH?
ECID SHSH is a unique signature which is checked against Apple servers whenever you decide to restore the firmware on any of your Device. Once a new firmware is released, Apple stops signing the older firmware, hence making it impossible to restore back to the older firmware from iTunes.And Why Should I Save SHSH Blobs?
By Using a SHSH blob, you can downgrade or restore back to the older firmware. This is important because if you don’t have your SHSH blob saved, and accidently update to new firmware, you’ll loose your jailbreak and furthermore, you wont be able to downgrade back to older firmware to re-jailbreak your device.Steps:
Step 1: Download TinyUmbrella V4.00.06 (Mac / Windows / Linux)Step 2: Make sure you are running iTunes on your Device.
Step 3: Now Connect your Device to Computer via USB
Step 4: Launch TinyUmbrella and Click on Save SHSH, Now your SHSH blob will be saved on Cydia Server by default or on your computer if you have chosen to.
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