ABC News has obtained a confidential airline industry report which documents 75 incidents that pilots and engineers think are linked to cell phones or other electronic devices. They include "autopilot disengaged by itself," "left GPS is not reading correctly," and "rapid changes in cabin altitude and altitude control."
According to Chicago-based aircraft maker Boeing, home electronic devices radiate signals that can disrupt equipment, including those for an instrument landing system used in bad weather.
"The equipment that feeds the data to the cockpit, the radios and the communications and navigations equipment itself is located under the floor of the plane or in the overhead or in the walls," said Boeing's Dave Carson.
As for those newer planes with Wi-Fi capability, they are specially built, so your signal doesn't interfere with the aircraft's.