Mark wants to know how he can keep his daughter from losing her iPhone. It either gets lost, broken or stolen and it's breaking him. Leo says that there is the Zomm leash, which sounds an alarm when she would walk away from her phone. It works, but if the phone is stolen, the last thing he'll want is for her to chase after the person who stole it. That's where Find my iPhone comes in handy. She would just call the police and let them know where it is.