Data usage while playing stored music
There appears to be no way to stop Apple Music from streaming: I have 1000+ tracks saved to device, songs restricted to "Showing only music on this device", every track has the little rectangle symbol beside the track length & the settings Download Only on WiFi = ON, Use cellular Data = OFF. Every track has the option to "Remove Download", yet each track played uses about 4MB of data & sure enough, if I put the phone into airplane mode or activate a firewall Apple music just sits there spinning until it reports an error due to being offline. I could forgive the app needing to immediately upload play stats and the like, but there's no excuse for data usage like that.
I thought this could be related to Apples failure to allow SD card storage, however a recent upgrade to Android 6 (which treats SD as internal memory) has not fixed the issue.
Other OS, null