so I have probably the most "newbie" question ever, but I don't understand why I have to either be on wifi or it comes up with a message saying I have to access my cellular data to listen to my own music? My device is an iPhone 6.
Is your music on your phone?
As far as I know? I just recently got a replacement from Apple. So how would I check. I go to my music and it's all in there
Follow this and show only music available on this phone:
http://www.imore.com/how-view-offline-music-your-iphone-ipad-or-ipod-touch