I have borrowed/taken-over my girlfriend's iPhone 4 that had iOS 4.x installed. She has changed phone carrier, so I don't have any active iPhone SIM card at present.
Anyhow, I updated to iOS 6 and gave it a Wi-Fi connection for its configuration. However, it just states I should contact customer care, but I don't really believe I should need activation? The phone should not be locked as far as I know, but is that the problem? Or is it the change in iTunes account?
I am not sure how to progress from here... So I am hoping someone here recognizes the problem, so I can explain the problem properly over phone and/or contact the right ones