I've set up my Garmin devices to ignore phone calls and texts from the phone during workouts. As an FYI, if you have an iPhone, you can set a "Fitness" focus m

I've set up my Garmin devices to ignore phone calls and texts from the phone during workouts. As an FYI, if you have an iPhone, you can set a "Fitness" focus mode that turns on automatically when a workout is started. From there, you can specify which contacts can pop a notification during workouts (or none at all). I let my wife and my parents get through. But, like you, not that I'd use a phone as a bike computer to begin with.