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Fix Your iTunes Errors With TinyUmbrella
TinyUmbrella can bypass the iPhone error "3194" and bypass apple software confirmation also.
download TinyUmbrella from this link [Direct Link]
install and run on your PC and click on "Advance Tab"
Now unchecked the "Set Hosts To Cydia on Exit" and now click on "Start TSS Server" and you're done.
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Fix Your iTunes Errors With EDIT "Host" File
1. Locate HOST file on windows directory C:\windows\system32\drivers\etc
2. Copy HOST file on desktop and open and Eedit in NOTEPAD
3. And remove the gs.apple.com
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Now past HOST file to C:\windows\system32\drivers\etc and restart your computer
you're done now you can install and restore costume firmware.