Recently, i update my iPhone 5 to IOS 7 without an UDID registration and i register my apple id with the phone. After that the apple id is been hacked after a short period of time and then i downgrade back to IOS 6. After the process of downgrading, i have encountered where the activation of the iphone needed the apple id. So i called the apple support team, and they manage to get back the apple id for me. But the apple id was totally reset by the apple support team. I tried to activate the iphone by entering the apple id where i just retrieved back, but unfortunately it state that 'this apple id cannot unlock this phone'. I tried so many ways and i just cant find a solution on it. I think is issue is got to be relate to find my iphone.