Thank you for reaching out. Have you had an update recently?
Do you know if the person you are experiencing these symptoms with has an Android or Apple device?
So just last night I was texting someone and my messages were blue but when I woke up and sent a text they turned green and the "Send as chat message" option was gone, is there any reason behind this? It works for other people but not this one person
I have seen few threads about user on ATT not having advanced messaging(chat messages) not working properly. I believe ATT and Samsung will need to figure this out