My iPhone is on iOS 4.2.1 and I want to upgrade it to iOS 4.3.3. I know there are newer iOS versions available but they can't be jailbroken untethered.
I have the 4.3.3 package from Apple, and I know I can shift-click the "Upgrade" button in iTunes to select this file. When I do, iTunes first extracts the file (no problem) and then tries to verify it, and here's where the trouble starts. iTunes gives me an error 3194 which according to a Google search means that iTunes didn't get a useful response from the validation server.
I've checked for these possible causes:
hostsfile might have a custom entry which prevents iTunes from getting a response. I've checked: There are no entries in the hosts file, only #comment lines.
- A tool like
tinyumbrellamight have changed the lookup. I installed tinyumbrella and checked: it's set to use normal iTunes settings, no overrides are active.
How can I get rid of this error and upgrade to iOS version 4.3.3? I'm on Windows.