iOS 8.3 update will delete music with iTunes match
Just a warning. If you have iTunes match have not enabled it, the 8.3 update will turn it back on and will delete all your locally stored music. I don't know if it would work, but check iTunes and App store preferences in settings to unenable iTunes match before you open the music app.
I just lost 50GBs of music on my iPhone because of this. Not happy because my Macbook is in another city and my iPod Classic's hard drive died last week. It hard to understand why this would happen as after the update even the apps running in the background before the update were still running after.
Thanks Apple.
iPhone 6, iOS 8.2