Aside from the fact an I phone is a computer with a phone ap, it is first and foremost a radio. It receives and transmits radio signals.
There is no privacy with a signal broadcast on radio waves
I can attest to the truth of that.
I had a scanner so I could receive transmissions from the fire department I volenteered to serve.
I could pick up and listen to cell phone conversations.
Newt could probably attest to this too