I refuse to buy an Amazon Echo or Google Home because I don't want anything listening to me constantly. I would also like to be able to carry my smartphone around without worrying about it listening to me either.
I know this sounds a bit paranoid and may be irrational, but I like being paranoid and irrational.
Which phone will best suit my paranoia and irrationality? Are Android and iOS devices immediately disqualified?
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.