HT4623 my phone is giveing me error 21 since i updated it to ios7 it wont turn on it wont restore i have tried several times to restore the device but im really at a loss what is the best option for me ?
hi, my iphone 5 has refused to restore after i updated it to ios7 ...... it will not turn on, it will not restore i do get an error 21 mesg and i have attempted a couple of fixes from the net, but nothing seems to work . i have no acces to my phone it just is dead whats my best option, do i need to send it to apple ?
Hello Peter,
Thank you for using Apple Support Communities!
Error 21 is part of a range of error codes generally indicating that other software is interfering with the restore process.
Check out the troubleshooting from this article named:
iTunes: Specific update-and-restore error messages and advanced troubleshooting
http://support.apple.com/kb/TS3694#error21
Error 20, 21, 23, 26, 28, 29, 34, 36, 37, 40
These errors typically occur when security software interferes with the restore and update process. Use the steps to troubleshoot security software issues to resolve this issue. In rare cases, these errors may be a hardware issue. If the errors persist on another computer, the device may need service.
Also, check your hosts file to verify that it's not blocking iTunes from communicating with the update server. See the steps under the heading "Blocked by configuration (Mac OS X / Windows) > Rebuild network information > Mac OS X > The hosts file may also be blocking the iTunes Store." If you have software used to perform unauthorized modifications to the iOS device, uninstall this software prior to editing the hosts file to prevent that software from automatically modifying the hosts file again on restart.
All the very best,
Sterling
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