I wonder why the latest generation of phones aren't designed so that they can be switched off remotely. I’m not talking about jamming. I mean design the phone so that it switches itself off when it receives a specially coded message. You could then put a small “killer” transmitter on every plane or right near the gate. If on the plane it would only need to be on for a second or two before take off and perhaps again briefly when it detected a phone being switched on in the air. You could even design the phone so that it couldn’t be turned on again (for 24 hours?) if it’s deliberately switched on when onboard an aircraft.