Q: Keep getting error  code 21 and I have tried all the suggestions any others?

Hey MamoCas,

Thanks for the question. Error codes in the 10-47 range usually indicate possible hardware issues. If you have attempted to restore your iPhone two more times with a secondary cable/computer/network, and still receive the error, please contact Apple for support and service options. The following link should help you get started with the process. Included, you will find information on topics such as warranty, service pricing, and express replacement service.

Apple - Support - Service Answer Center

http://www.apple.com/support/iphone/service/faq/

Additional Information:

Resolve specific iTunes update and restore errors

http://support.apple.com/kb/TS3694

Check for hardware issues

Try to restore your iOS device two more times while connected with a cable, computer, and network you know are good. Also, confirm your security software and settings are allowing communication between your device and update servers. If you still see the alert when you update or restore, contact Apple support.

 

Common errors: 1, 10-47, 1002, 1011, 1012, 1014, 1000-1020.

Thanks,

Matt M.