Spotify is now a premium option, sort of.....
Spotify premium is now a premium option for the unlimited and more plan.
I tried to add this today, however I have to wait 12 months before I am allowed to change my premium option.
I literally just signed up for the unlimited and more plan 2 weeks ago and AT&T will not let me switch to the Spotify option.
This is a real disadvantage for existing customers. Maybe switching over to the Verizon unlimited plan and getting Apple Music included will be a better choice.