When tried to upgrade iphone 4S from 8.1.2 to 8.1.3 it crushed at the middle, after it it not let it tern on and cannot make recovery and crush in the middle of the process with "could not be restored. An unknown error occurred (3014)"

Hi bahaluly,

Thank you for contributing to the Apple Support Communities.

If you see "an unknown error occured (3014)" when trying to restore your iPhone 4s, first try updating iTunes and then restoring your iPhone again:

Errors 3000-3020

If you see one of these messages and need help updating or restoring your iOS device, install the latest version of iTunes and try to update or restore again.

This information comes from the article below. If your iPhone still can't be restored, see the article for more troubleshooting tips:

Error 3194, Error 17, or "This device isn't eligible for the requested build" - Apple Support

All the best,

Jeremy

Hi bahaluly,

Thanks for using Apple Support Communities. Based on what you stated, it sounds like you are not able to update the iPhone. I would recommend that you read this article, it may be able to help the issue.

Get help with iOS update and restore errors - Apple Support

Solve network errors

Related errors: 17, 1638, 3014, 3194, 3000, 3002, 3004, 3013, 3014, 3015, 3194, 3200, or "There was a problem downloading the software," or "The device isn't eligible for the requested build." These alerts mean that your computer is either having difficulty contacting the Apple update server or communicating with your device.

Check your computer for software or settings that might cause communication issues between your computer and Apple or between your computer and your device.

Cheers,

Mario