- iphone with ios 7 or later
- alternatively an android in which you can turn off data for select apps
- spotify app
To use your spotify account on two devices the spotify server can not know one of the devices is in use so we will take it offline. To be able to enjoy music while offline you must make a playlist and make it "available offline." I have two playlists offline.
Go into your settings go to cellular for iphone turn off cellular data for spotify. slide up the menu from the bottom of the screen and turn off your wifi. I don't know the process for androids or if its doable.