This iTunes error 3194 has transform extremely popular due to the fact that Apple has no longer signed the IOS, and principally goes out if you have saved the SHSHs.
With the new iReb this and we can solve in a very simple way:
Step 1 .- Download iREB.
Step 2 .- Connect the iPhone to your computer and open iReb.
Step 3 .- We click on Online Mode and follow the instructions.
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