I remember reading here during an earlier discussion that the ban on electronic devices had less to do with interference and more about safety in case of emergencies.
During takeoff and landing are when most accidents happen and if people have cables from earphones/laptops, are listening to music or are on their phone, it would be considerable harder for the flight crew to get the attention of the passengers and direct them.
I remember this same topic being addressed in an earlier discussion too. When the "fasten your seatbelt" lights are on, for example during turbulences, electronic devices should be off too, mostly because you may need to be in a state of alertness rather than playing a game.
