If you don't have DM's yet, and have 2 phones, try this to get it.

I randomly decided to download Spotify on my Samsung device (I main an iPhone). I noticed i had the DM's feature on that phone, then i've sent a message to someone. Then i opened Spotify on my iPhone, and now i have the DM's feature on there aswell.

For some reason i do have the Mix feature on 2 of my Samsung's, but not my iPhone. I couldn't find a way to get the Mix feature quicker on my iPhone, but if you want to try DM's, here u go.

(sorry if the flair is wrong, i don't know which to choose.)