How do I get a visual notification when I call someone and they are on a call, on my mates one he gets a small message (pop up) saying "call waiting"
This could be network specific.
Are you on the same Network as your friend and using the same unbranded or branded phones ?
Daily Driver > Samsung Galaxy s²³ Ultra 512Gb in Phantom Black.The advice I offer is my own and does not represent Samsung’s position. I'm here to help. " This is the way. "