DD's friends are not yet online and also don't really have phones, and I'm happy with that reality. I read a lot about this subject for work, and I don't feel DD is ready for this social universe yet. She's an emotionally immature 10, and I'd like her to spend more time navigating friendship in the face to face world before she goes off into a place with fewer cues.
I do think she's ready to spend more time with apps, programming, movie-making, digital drawing, etc--I've relaxed on that stuff. However, it's a balancing act, because I want DS6 to stay with books, markers, real-life building toys, and the "real world" a while longer.