I use a Android phone that is rooted, deleted bloatware crap that comes pre installed and use F-Droid to install alternative open-source apps. I always keep the firewall on. Been doing this even before I got into Bitcoin. However, my workspace devices are completely within the Apple ecosystem, which feels terrible for privacy. I can’t do much about it, so I just avoid doing anything personal on them. These devices all have AI integrated, which can be annoying but helpful, depending on your needs.