If you see error 1015 or a message that says 'The required resource can't be found.'

If you see this error when you update or restore your iPhone or iPad, use recovery mode.

If you see error 1015 or a message that "the required resource can't be found," you might be trying to install an earlier version of iOS (downgrading).

To restore your device to the latest version of software, use recovery mode on your iPhone or recovery mode on your iPad.