Today I went to listen to some music on my iPhone 6s plus (sprint) and all of the sudden I notice that about 70% of my music is gone so I hook it up to iTunes and see that everything is still listed in iTunes, I do not have auto sync enabled I have always managed my music manually. I tried hitting sync once I see that it's all in iTunes but nothing works. Then to top it all off,now it seems that the music that is visible on my iPhone will only play when I am connected to wifi when I can assure you that the music is on my phones internal storage. I have tried looking into this, and I have toggled the show apple music setting in the music app settings, I have tried restarting the phone and everything that has been suggested through a google search and nothing has worked. I am on iOS 9 latest version. 9.3.2 Any suggestions would be greatly appreciated as I am very frustrated because I use my iPhone for a huge majority of my music throughout the day.