Learn why you can never leave your phone on the plane

The first step you have to take after you get on the plane is to start “Airplane Mode”. This has been because there have been times when pilots have been put in trouble by the lighting of phones to the passengers.

Cell phones during flight make a constant noise that could prevent pilots from communicating.

This noise is similar to the noise caused by someone on the phone on the radio. That's why it's stopped in every way if the cell phone is on the flight.