When trying to restore my iphone its says unknown error (-1) what should i do??

when trying to restore my iphone its says unknown error (-1) what should i do??

http://support.apple.com/kb/TS3694
Unable to contact the iOS software update server gs.apple.com
Error 1004, 1013, 1638, 3014, 3194: These errors may be the result of the connection to gs.apple.com being redirected or blocked. Follow these steps to resolve these errors:
Install the latest version of iTunes.
Check security software. Ensure that communication to gs.apple.com is allowed. Follow this article for assistance with security software. iTunes for Windows: Troubleshooting security software issues.
Check the hosts file. The restore will fail if there is an active entry to redirect gs.apple.com. FollowiTunes: Advanced iTunes Store troubleshooting to edit the hosts file or revert to a default hosts file. See section "Blocked by configuration: (Mac OS X/Windows) > Rebuild network information".
Try to restore from another known-good computer and network.
If the errors persist on another computer, the device may need service.

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    This Error is often received when the iPhone has the iPad baseband installed. So iTunes sees a higher number in your iPhone and gives downgrade Error 1015, because iPad baseband is numerically higher than iPhone 3G baseband. You will have to search the Web for the complete fix which in now available.

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    my iphone 3 couldn't restore, its saying the error 46. what is the meaning of error 46?and how can i resolve it?

    It doesn't matter when you installed antivirus software; if you have it on your computer it will frequently block access from applications to sites it does not know about. A sync does not require access to a site not on your computer; an upgrade clearly does. So if you have never jailbroken any device you do not need to be concerned about your hosts file, but you DO need to temporarily disable your antivirus during the update process.
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  • TS3694 Please tell me how to resolve error 1015 when trying to restore an Iphone 3g!!!!

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