It’s not doing it in any kind of obvious way. There’s no “Murder My Owner” app that it downloads in the middle of the night, and then electrocutes you any time you reach for it (or failed to check it in the last 5 minutes).
No, it’s far more subtle — and effective. Because your smartphone is trying to kill you by creating hard-to-break habits of checking it. Even while you’re doing life-and-death kinds of things, like driving a two-ton vehicle at 65 MPH down an interstate.