1 Reply Latest reply: Jan 30, 2013 3:55 AM by FelipeV
rlay Level 1 Level 1 (0 points)

I want to upgrade the iphone 4 to ios6.1 today. But it fail on the phone and ask me to connect to itunes.


At the itunes it turns the iphone into recovery mode, download the new firmware and the show error 21 and stop. Now I cannot use my iphone. What can I do?

iPhone 4, iOS 6.0.2, cannot upgrade to 6.1