It can be tricky to put the phone in DFU mode, but if you follow the guide, you will be able to achieve in 2 to 3 attempts.
After the phone is restored to the latest version of i OS, connect the phone again to i Tunes and restore the backup you created at the very beginning.
This is an essential step otherwise you may encounter future errors when trying to update or install i OS versions.
Note that i Tunes Error 3194 can also happen sometimes if the wrong firmware version is used, and you will see an error message like “This device isn’t eligible for the requested build”, which is why it’s necessary to always use the appropriate firmware files for your device if you are performing manual updates.
If you need them, you can get the latest versions of i Phone firmware, i Pad firmware, and i Pod touch firmware directly from Apple.If you run into Error 3194 within i Tunes when you are trying to restore your i Phone, i Pad, or i Pod touch, you can fix it by temporarily blocking Apple’s firmware signing services.Error 3194 seems to usually be triggered when unsigned or expired firmware is used, often during an i OS downgrade or upgrade, or even during some restores.Now open this page and check if your phone is a GSM or a Global Model.Having done that, head over to and download the latest IPSW file for your i Phone.