Can someone please explain to me the following: I had chosen quite a number of songs and playlists from Apple music and downloaded them all offline to my iPhone. On listening to them for about 1-2 hours i decided to check my data usage. On settings-cellular, it showed that music was about 250MB. BUT when I went to system services in cellular, the media services showed 4.9GB usage. My overall data usage jumped from 1.1GB to 5.9GB in 2 hours...... My Music in the cellular usage was still 250MB, I know this as I called my provider at that moment. I then received a notice from my provider that I was over my data quota for the month... Why?? What is the cause of this? Is it the Apple Music and why? Thanks.