How many times have you listened to the instructions in the announcement during a flight and obeyed them? The most common instruction we conveniently turn a deaf ear to on an airplane is the one in which they ask us to turn our cell-phones off or put them in the airplane mode. 

It is believed that the cellphone’s radio signals might interfere with the flight’s navigation causing difficulties for the pilot to land or take off properly. However, this is not entirely true. As you might have guessed, our phone’s radio signal emissions are not so great in magnitude to mess up an airplane’s entire navigation process.

The truth is that this radio interference is more annoying than it is dangerous.

The interference caused by mobile phone signals registers on the headsets of the flight deck, in the same manner that one might have encountered on speakers affected by a nearby mobile. While the noise caused by single phone is absolutely negligible, when several people start using their cellphones together, the radio interference caused by mobile phones create havoc for the pilot in a completely unexpected manner.