I have a iPhone 5 running 6.1 jailbroken with evasi0n. I recently updated some things in cydia, and after it resprung it brought me to the activate your iphone screen. I tried and it just hangs forever. So naturally I tried restoring which failed with error 21. After this I tried putting it into recovery mode and DFU mode and restore through itunes that way. It still gives the error. What can I do to solve this problem and restore my iPhone? I have also of course made sure that my mac and itunes were up to date. Thank you for any assistance.