The truly paranoid answer probably is burner phones with no personally identifiable information on them but that might not exactly be practical or useful in man

The truly paranoid answer probably is burner phones with no personally identifiable information on them but that might not exactly be practical or useful in many cases. iOS devices fare pretty well in terms of privacy. Siri operates on your data entirely locally, for instance (which some people argue puts Apple's AI efforts at a disadvantage). Apple's software isn't open source, of course. So admittedly, you can't be a hundred percent sure they really do what they claim to do. Still, I think within a reasonable margin of doubt, iOS devices can be trusted.