Q: error 1 in itunes when update

Hey boyskie,

I understand that you are seeing some issues with updating your iPhone 4s and are receiving a few error codes. I have two articles that address the error codes you mentioned with some relevant troubleshooting steps, and they can be found below:

Check for hardware issues

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 mean that your device or computer might have a hardware issue that stops the update or restore from completing.

 

1. Check that your security software and settings aren't blocking your device from communicating with the Apple update server.
2. Then try to restore your iOS device two more times while connected with a cable, computer, and network you know are good.
3. Make sure that your security software and settings are allowing communication between your device and update servers.
4. If you still see the error message when you update or restore, contact Apple support.

Get help with iOS update and restore errors - Apple Support

https://support.apple.com/en-us/TS3694

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

https://support.apple.com/en-us/HT201442

Thanks for coming to the Apple Support Communities!

Cheers,

Braden