Can I downgrade my iPhone 3GS Running 4.0.1 to 3.1.3 if I don't have my SHSH Blobs?

Number47

New member
Ok, I'm in a bit of trouble. I just spent $300 on a new iPhone 3GS and it's running 4.0.1
Problem is it's not jailbroken, and I don't have my shsh blobs backed up. I've tried putting it in DFU mode & recovery mode, then restoring, but nothing seems to be doing the trick, I keep getting errors that it's not eligible. I guess Apple stopped signing 3.1.3, but I don't know what to do:( and I don't think it's possible to jailbreak iPhone 3GS 4.0.1 Either.
 
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