It doesn’t work for me either. I have dialed the normal Delta number and entered my SM # and ended up in the general SM call queue where the agent pulled my account up and was surprised to have me in their queue. The only way for me to get to to diamond desk is to dial the diamond line, and since it doesn’t recognize my mobile or my office numbers in terms of linking them and identifying me in advance, I have to key in my SM number and then it recognizes me and routes me to the Diamond desk. It’s actually kind of funny that a simple feature such as call routing by customer segment, doesn’t work for Delta’s highest tiered customer segment. Oh well - first world problem I suppose.