stolen iphone

Take it to your closest police station and report what happened and how you came to possess it. Ask them to return it to it's rightful owner and if they can help track down the scumbag that sold it to you great (but I wouldn't hold my breath on that bit). Do anything else and you risk being viewed as an accessory in the theft, receiver of stolen property, etc. If you are able to identify the seller, report them to the police.

You probably have been unable to Activate that stolen iPhone. There is nothing that you can do to use that iPhone OR find the original owner. The only that you may be able to do is to contact the seller and demand your money back and if you are not able to do that then report the seller to eBay etc. (If that is where you bought the iPhone from).

Axel F.