I found an iphone 4s but its locked how can i unlock it besides using itunes?

I found an iphone 4s but its locked how can i unlock it besides using itunes?

Hand it in to the police and they'll unlock it and find the owner!

You don't want to do that. The moment you do, it will call home (it may do this without even unlocking it… All it needs is power), and the real owners will know where you are!

That is not your phone. Return it to an Apple store or the police.

Chances are it was reported lost/stolen and will not activate.

They can be tracked.