That kind of technology is hard to get any value from. Nothing in modern phones is innovative, and most of it would be an obvious evolutionary step to any specialist in their field.
Mostly, though, the phones would be useless. Cellular networks were in their infacy, and none of the standards or technology existed to charge them. Reverse engineering anything in them would be hugely expensive, for little return.
Smart phones would be interesting, but far less interesting than the existance of a person who has access to future technology. I think op would dissappear into a government facility not long after trying to pawn their goods.