Apple is Doing SHSH Blobs Check

The iPhone Dev Team has just posted that Apple started Doing "Soft" SHSH Blobs Check Starting from iOS 4, This means that like the 3GS and the iPhone 4, if iTunes can’t get your blobs (due to signing window being closed), the iTunes restore will error out.

Here's the post from Dev Team:

Those of you with jailbroken iPhone3G and ipt2G devices may now have noticed Cydia starting to save your SHSH blobs too, just like it does for iPhone3GS, ipt3G and later devices. That’s because starting with 4.0, Apple started putting a “soft” SHSH blob check in the firmware. The SHSH blob check is very real in the sense that if iTunes can’t get your blobs (because the Apple signing window has closed), the iTunes restore will error out. But it’s “soft” in the sense that those devices can always use redsn0w or PwnageTool to get past the error (the bootroms themselves for those devices don’t require blobs to be in the firmware files, unlike the newer bootroms).

So, Cydia is doing this to allow you to continue to use iTunes to restore to 4.x on iPhone3G and ipt2g outside of Apple’s signing window without needing to use redsn0w or PwnageTool to get around Apple’s annoying new restriction.

So Cydia Started to Save SHSH Blobs of older Devices as iPhone 3G and iPod Touch 2G as well, But we are lucky since the Check is "Soft", so it can be easily bypassed by using redsn0w or PwnageTool from the Dev Team.

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