To be offline, you really have to get rid of all seduction and find a place where there is no internet connection or, as you did, leave the phone and other devices at home. I have also noticed myself that, as far as there is an Internet connection, I still have the feeling in being with other people that I want to return to something important later and that this urge in the background of my existence already influences the quality of social interaction. Even if this is not yet a real appearance of addiction, the description of a phantom pain is quite accurate. It is difficult to admit this to oneself. Sometimes you wish that higher powers would free you from the grid from time to time and "force" you to get rid of all of it. But self-discipline is probably the best of all actions.
It's interesting that you say that you didn't miss your phone because you're crisis-free right now. Does this mean that in times of crisis you seek comfort while surfing or in things online that help you get over a crisis? ...What if I think about it more carefully, is probably a habit that we modern people have accepted. But I often ask myself whether it is not the online life that causes such crises in the first place. I'm a bit ambivalent and as always I come to the conclusion that everything that the online world serves you with sweets is just as sour. You never have one without the other.
I thank you for this report, because it gives me insight about a stranger and yet reveals so many similarities. In which part of the world do you live?
edit: I just saw that you say "Switzerland" "Italy" in your header. So we are not far from each other.