To troubleshoot network faults

Related Errors: 17, 1638, 3014, 3194, 3000, 3002, 3004, 3013, 3014, 3015, 3194, 3200 or "software downloading problem occurred" or "The device is not suitable for the desired development." This warning indicates that Apple's update server on your computer or difficulties in communicating with your device.

Check your computer for your computer that can cause problems in communication between your device to your Apple computer or software or settings.
Check your security software

Related Errors: 2, 4, 6, 9, 1611, 9006. Some security software can prevent your device with Apple's update server or to communicate with your device.
check your settings, your security software and make sure they do not block communication with Apple's servers.

Check your USB connection

Related Errors: 13, 14, 1600, 1601, 1602, 1603, 1604, 1611, 1643-1650, 2000, 2001, 2002, 2005, 2006, 2009, 4005, 4013, 4014 or "invalid response".
If your USB device is disconnected from your computer, you can not update or restore.

To narrow down the problem, you can try different equipment:
The USB cable that came with your device or use a different Apple USB cable.
Connect your cable directly into a different USB port on your computer. Do not connect the cable to your keyboard.

Try a different computer.

Before the USB connection, then solve other problems with your security software.
Check the hardware problems by monitoring the next section if you continue to see the error message.

Check the hardware problem

Related errors: 1, 3, 11, 12, 13, 14, 16, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 1002, 1004, 1011, 1012, 1014 , 1667 or 1669.

These errors may indicate a hardware problem that prevents the update or restore your device or computer to complete the installation.

Make sure your security software and your device's settings prevent communication with Apple's update server.
Then restore your iOS device, a cable that you know works, try two more times by connecting the computer and the network.

Make sure your security software and settings to allow communication between your device update servers.
If you still see an error message during an update or restore contact Apple support.

Check the date or modified software

Related Errors: 1015, "can not find the necessary resources."
You can see this error if any of the following:
You outdated version of iTunes. Get the latest version of iTunes and try again to update or restore.

If your device has a beta version of iOS.
If you are trying to install an earlier version of iOS (drop version).
IOS on your device "lock break (jailbreak)" has been conducted so-called unauthorized changes.