What happens if we don't take our cell phones offline while flying?

 What happens if we don't take our cell phones offline while flying?

Cell phones—as well as laptops, handheld gaming systems, e-readers and other devices—emit radio waves that can affect navigation and radar equipment as well as cause interference in pilots' headsets

However, any unexpected beep, buzz or static burst in the cockpit can pull pilots' attention away from flying, increasing risk during takeoff, landing or turbulence.