HT201413: Resolve issues between iTunes and third-party security software

Learn about Resolve issues between iTunes and third-party security software
AyeJayMac

Q: while connecting to Itunes my phone won't have a serial number verified and ends up having an error (21) tried every step through the basic helpful website. but still can not restore my phone.

while connecting to Itunes my phone won't have a serial number verified and ends up having an error (21) tried every step through the basic helpful website. but still can not restore my phone.

 

it will go through the whole restore function but half way through my phone will turn off then back on then the error mssage will pop up.

 

Need help?!?

iPhone 4S, Windows 8

Posted on Feb 4, 2014 4:27 PM