Here we described the process to save SHSH Blobs(ECID SHSH) of iPhone 3GS, iPod Touch & iPad. This is a guide for Windows and work on iOS 4.0 too.
It’s important if you want to Jailbreak (by downgrading) your device again should Apple patches the exploit used by the new unlock and jailbreak tools. It is also important to note that you wont be able to save SHSH Blobs once Apple has released the new firmware (iOS 4.0.1 / iOS 4.1). This is because Apple will stop signing the iOS 4 firmware once the new one has been released, hence negating you to save your iOS Device SHSH files.
Use the step by step guide posted below to save your SHSH blobs (ECID SHSH) of iPhone 3GS, iPod touch 2G/3G on iOS 4 without having to jailbreak your device.
Step 1: Download the latest version of TinyUmbrella for Windows
Step 2: Make sure you are running iTunes > 9.0. iTunes 9.2 is recommended.
Step 3: Start the program and plug in any ONE of the supported iDevices (iPhone/iPad/iPod touch).
Step 4: Click on “Save My SHSH”. TinyUmbrella will now grab the signature for you.
It will be enabled again once a ticket has been generated to save it to saurik’s server.
Ok, then. You are safe now. Make sure you save the signature for your iPhone, iPad and iPod touch on file before Apple releases the next firmware. Its a must do if you want Jailbreak for all future version.
Thanks: RedMond pie
You could always get support from UnlockAlliPhone.com about any Unlock & JailBreak issue of any model of iPhone including iPhone 2G,3G & 3GS and also upcoming iPhone 4. They provide Premium Members Support for life time. Means just pay one time a small fee and you will receive support(real human support – avg response time 2 hour) for all present & future version of iPhone.