My IOS is 4.3.5 and i have jail broken the iPhone and now i want to remove the jail brake and update my IOS to 6.1.2 and i cannot upgrade the software or restore the software, i keep getting the 3194 error and i even tried to while in DFU mode, same error

http://support.apple.com/kb/ts3694#error3194

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:

1. Install the latest version of iTunes.
2. 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.
3. 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".
4. Try to restore from another known-good computer and network.
5. If the errors persist on another computer, the device may need service.

If Allan's suggestions don't work, you're on your own. Discussing jailbroken phones is forbidden by the terms of service.