I have iphone 5, when i try to activate it, it says it is mapped to another icloud id?

I have iphone 5, when i try to activate it, it says it is mapped to another icloud id and i need to enter the password for that id.

I bought this iphone from someone and he is not available.

Need help to activate the phone and change icloud id in it.

You got taken.

You have to find that guy and tell you his password and sign out ID
Or you can visit apple store in your country

You have to get into contact with him somehow. That's the only way. Sounds like he didn't properly set it up for sale or unfortunately he sold it to you knowing this would happen.