I'm not talking about from Spotify or other streaming services where you can download music, but actually save them from iTunes to your phone storage? I haven't done it in a year, but I'm too lazy to save thousands of songs which will take forever.
I actually save my song through Google play, and then create playlistsome which I save. So they aren't technically saved on my phone, but i can always make them available by adding the song to a playlist I do save on my phone. It works the best for me!