I'm pretty sure I could do this before but today I just noticed when I try to share a Contacts info (vcf) in the stock samsung messages app, i get an error message. But it works with google/android messages. Checked my wife's S9 and she has different options when you click the + sign when composing messages. I've attached a screenshot of my choices. Is this what all other s10 users have? Can you attach/share contact via samsung messages? Thanks all.