This fixes iTunes error 21 for users attempting to update to 6.1 and do the upcoming Jailbreak...
How to fix iTunes error code 14 and error 21 with iOS 6.1 update on iPhone 5? I downloaded the newest iOS 6.1 update and it failed to update on my iPhone 5 (on my PC). Now my iPhone 5 is stuck in recovery mode and I have to restore it. When I go to update and restore the phone, it extracts the software, prepares the iphone for restore, waits for the iphone, verifies iphone, and then gets stuck on restoring iphone. iTunes give me error 14, then error 21 please help me.
So I had this issue too. I would get an error 21 when restoring from recovery mode and an error 1600 when restoring in DFU. I was trying to upgrade from 6.0.1 to 6.1 (iPhone 5) and it turned out to be my hosts file. back up the hosts file somewhere and delete everything under the 127.******* local host line and save it. worked like a charm after I did this, no error 21. Not sure if this will help you but it helped me. Good Luck.
Navigate to C:Windows>System>32drivers>etc and locate “hosts” file.
You can also download modified hosts File and copy it here C:WindowsSystem32driversetc
How to fix iTunes error code 14 and error 21 with iOS 6.1 update on iPhone 5? I downloaded the newest iOS 6.1 update and it failed to update on my iPhone 5 (on my PC). Now my iPhone 5 is stuck in recovery mode and I have to restore it. When I go to update and restore the phone, it extracts the software, prepares the iphone for restore, waits for the iphone, verifies iphone, and then gets stuck on restoring iphone. iTunes give me error 14, then error 21 please help me.
So I had this issue too. I would get an error 21 when restoring from recovery mode and an error 1600 when restoring in DFU. I was trying to upgrade from 6.0.1 to 6.1 (iPhone 5) and it turned out to be my hosts file. back up the hosts file somewhere and delete everything under the 127.******* local host line and save it. worked like a charm after I did this, no error 21. Not sure if this will help you but it helped me. Good Luck.
Navigate to C:Windows>System>32drivers>etc and locate “hosts” file.
You can also download modified hosts File and copy it here C:WindowsSystem32driversetc