> While just about everyone knows to turn their cellphone off or on airplane mode once the plane takes off, there’s no rule against using it while your plane is

> While just about everyone knows to turn their cellphone off or on airplane mode once the plane takes off, there’s no rule against using it while your plane is on the ground. In my experience it's not uncommon (but also far from universal) to hear some version of "please leave your phones in airplane mode until we have reached the terminal" after landing.