A film student, Anthony van der Meer, baited someone into robbing his phone then made a video about what the thief did with it.
Watch as the student comes face to face with the thief
More details about the film can be found here
http://uk.businessinsider.com/anthony-van-der-meer-tricks-thief-into-stealing-phone-then-spies-on-him-2016-12?r=US&IR=T