The reasons being (1) you are moving faster than the network hand over protocol is designed for and (2) even if it worked you could be impinging on the juicy ma

The reasons being (1) you are moving faster than the network hand over protocol is designed for and (2) even if it worked you could be impinging on the juicy margings of in-flight service offers. If airplanes could be brought down by turning on a cellphone you would never have been allowed to travel with one in the first place.