Had almost the same debate with my uncle, he was 100% sure a number shows exact location, like street level. In reality it’s way less precise. Phone number geolocation usually relies on country codes, carrier data, and sometimes general network info, so it points to a region, not a person’s exact spot. I once checked a weird incoming call through GEOfinder geolocate phone number and it only showed a broad area, which proved the point. So your dad isn’t totally wrong, but it’s definitely not as accurate as people think.