Seems spotify is using mobile data despite playing a playlist which has previously been downloaded to the device, this should not happen. The expectation is that the songs on the device would be played in order to prevent unneccesary streaming which drains the users mobile data.
Bit annoying if the only solution is to restrict all mobile data access to the spotify app, when a simple code condition should surfice : if song on device then play music on device else stream music from server ?
ios 11.2, using app, premium
We haven't heard from you in a while, so we'll be closing this thread for now.
If you're still having trouble with this, don't hesitate to let us know.