How to downgrade iPhone 4 from iOS 7 to iOS 6 without SHSH blobs?

I have a iPhone 4 with iOS 7.0.4 that has never been jailbroken. I have never saved any SHSH blobs. Is there any way that I could downgrade to iOS 6.x without any SHSH blobs at all?

I'm sorry your not gonna like this but it is simply not possible like people say SHSH blobs are like a fingerprint you simply can't do it withought the blobs

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