After installing NoRoot Firewall on my phone, I discovered that every single Samsung app was phoning home: camera, gallery, contacts, bixby, health, messaging, etc. On the upside, I was able to remove 99% of the pre-installed apps without any special tools. The only one that refused to go was bixy (and no way to reprogram the dedicated button), but at least it can be "disabled" and denied all permissions via Android's app manager.