

I don’t think of it as an insult generally, but it reads like an insult in this context to me since you certainly weren’t using it a clinical sense and it doesn’t land as a joke imo; now you can say that’s all on me if you want but communication has 2+ parties involved. Even if it wasn’t meant as an insult, it is still ableist language in this context imo and I will call it out even if it makes people uncomfortable.
Not sure, but I’d bet it’s less than flipphones / dumbphones. For the average person, smartphone and android/apple are probably synonymous.