We have AT&T, we don't use Sprint as their coverage is this area is non-existent. Is there a way to unlock it by perhaps paying for an unlock code online? I'm still confused as to why we can't activate it over WiFi or USB.
Did you get a more detailed error message when trying to activate it in iTunes? Maybe the phone is blacklisted - where did your father get it for free? You may have to call Apple or bring it into a store if iTunes activation is not working after a full restore with the latest official ipsw. -- University of Southern California - Fight On!