It's a unique app that has only ever been downloaded to only one cell phone in the United States. It can send out a pulse across every available frequency and networking, activating other phones, televisions, car alarms, and anything with a computer in it. The curious thing? It's designed to activate only those devices in one direction from the user's cell phone, as though he or she needs a distraction. Why is a short story.
Why the app is called "Phone Booth" is a longer story.