You mean he wants to put an rfid tag on something he wants to keep track of, using a cell phone as a detection/tracking device? Or something more esoteric?
... rfid detectors
... detector design
... example rfid with cell phone: product
... paper about a use of rfid reader/transmitter in a cell phone.
I bet there's a patent covering what your boss has in mind. Does he understand the limitations of rfid? Does he realise that he will need to reveal much more if he wants to investigate his idea for prior art and existing inventions.
More esoteric? I have seen a cell+gps system in a large asset like a car or a boat - this means you can call your asset and ask it where it is, and get the asset to call you if it is being moved without permission.