I know this has been addressed before but it's mostly about phones. I have a Samsung Galaxy and use Google messaging . I've been told that Google messages are not SMS and that's why I don't see them in my account activity but texts with some of my contacts ALWAYS show in activity and some of them NEVER show in activity. In both cases, some iPhone users are always in activity, some iPhone users are never in text activity. It also doesn't matter who the carrier is. Can someone please explain this? It also doesn't matter whether WiFi is on or off. It's very frustrating.