I know a few people who spend a LOT of time on their phones while piloting

so much so that the cockpit is their second office!!!
And I'm always waiting for that HOLY CRAP story to come out from them sooner or later...
I was told early on in my career to keep the office work onthe ground rather than in the air as it will kill you, and I have made this one of my rules...so much so, that I bought the Bose headset without blue tooth/cell connection

