Q: iPhone 6 Plus will not update error 56

Hello Gm_martinez,

Thanks for using the Apple Support Communities!

I understand that you have not been able to update your iPhone 6 and when you try, you receive error 56. I know these types of situations can be frustrating, but there are some troubleshooting steps I would suggest working through. 

The following article outlines the troubleshooting to work through for this specific error. 

Check for hardware issues

Errors: 1, 3, 11, 12, 13, 14, 16, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 53, 56, 1002, 1004, 1011, 1012, 1014, 1667, or 1669.

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.

If you still see the error message, check for outdated or modified software.

Get help with iOS update and restore errors - Apple Support

Cheers!