I had something similar to this happen to me a few years back.
I ended up taking the phone back to one of the phone companies kiosks. At the store the manager unlocked the phone in the back and pulled up the customers info (not giving it to me of course). He called the guys home and left a message to come and get his phone.
That is what I would do. No reason to go to the police or turn it into the cab company, just go straight to the source (if you can).









