Jan 19, 2012 Smart Phone as Baby Monitor I found another use for my smart phone. I used it as an interactive baby monitor. I placed my wife’s phone in his crib, and kept my phone with us. We were able to watch our son while being in another room. He entertained himself by watching his mobile and cooing. When we heard him whimper, we talked to him via face time. However, he eventually realized that we were not really in the room with him. What a smart little guy. We could not pull a fast one on him.