Fyi that model won't activate anymore. And you're not going to be able to unlock it. That's the whole point of security. So that someone can't just use someone else's device without permission. The government has tried to break into iphones beginning to criminals and haven't been able to do it. If they can't do it, you won't be able to!
I lost an Iphone 4 but you can keep it. They're garbage.
It depends but u can try yourself to jail break, watch YouTube videos for that
Thanks! Your answer is awaiting moderation.