what is error 21?
got a new iPhone 6 was trying to restore from backup on my iTunes and it keeps saying the device cannot be found and the error message 21
iPhone 6, iOS 8.4
Apple Event: May 7th at 7 am PT
got a new iPhone 6 was trying to restore from backup on my iTunes and it keeps saying the device cannot be found and the error message 21
iPhone 6, iOS 8.4
See this support document for explanation of error codes and troubleshooting steps. Error 21 is listed. Get help with iOS update and restore errors - Apple Support
See: Check for Hardwae Issues here > Get help with iOS update and restore errors
what is error 21?