When I've been lucky enough to fly private, they have not once said a peep about turning off my phone, which I'm sure they would have if they were legitimately

When I've been lucky enough to fly private, they have not once said a peep about turning off my phone, which I'm sure they would have if they were legitimately concerned about safety. Of course, the service doesn't work at altitude, so I tend to put it in airplane mode anyway just to avoid the battery drain of it constantly searching for a signal.