I know folks just like your buddy. I always carry my phone when I ride just as I always carry a credit card. However, I don't answer it or make calls on it during a ride unless my wife calls. If she calls when I am riding, it is something serious. I have a Cardo Bluetooth in my helmet; but I do not answer nor talk on the phone while I am riding. I do listen to my GPS instructions while riding if I have set a destination.