Below is a video of a person making a FaceTime call from an airplane using the on-board WiFi. Even though VoIP is blocked by WiFi providers on planes and cellphones do not work, there are still ways to communicate using an iPhone 4. Imagine the possibilities of this of being able to show what is happening on a plane in real-time. For example, if I was flying in and I knew my flight would be delayed, I could call the person and tell them I’ll be late. Or let’s say that there is some sort of disturbance like the Nigerian guy who lit his pants on fire in a plane, this could help homeland security.