Hello, how are you going? You've already solved?
My recommendation is that the iPhone disconnected from iTunes, put it in DFU mode, if you know Google searches because now I do not remember, (it is a combination of the power and home button).
Once the iPhone in DFU mode, connect it to iTunes and the only option that will give you is restored.
After restore, and as a safety measure, goals will surely ask for the password your Apple ID to verify that the iPhone is yours (that's what apple calls blocking activation).
And finally you put back up and ready.
I has this worked? For any further questions here we are. greetings