There are documented cases of electronic devices causing interference with onboard electronics. From Boeing: A passenger's palmtop computer was reported to

There are documented cases of electronic devices causing interference with onboard electronics. From Boeing: A passenger's palmtop computer was reported to cause the airplane to initiate a shallow bank turn. One minute after turning the PED off, the airplane returned to "on course." When the unit was brought to the flight deck, the flight crew noticed a strong correlation by turning the unit back on and watching the anomaly return, then turning the unit off and watching the anomaly stop. Link: http://www.boeing.com/commercial/aeromagazine/aero_10/interfere_textonly.html http://www.boeing.com/commercial/aeromagazine/aero_10/interf... I don't understand why Apple or Google don't pay Boeing the cost to test their phones on planes. It would be a great selling point.