I have just switched from an iPhone 5c to a 5s (because I was having horrible storage issues with the 8GB 5c). Everything about the transfer has worked perfectly, except that my entire music library has vanished! I have spent quite a lot on iTunes over the past few years, and now there seems no way to access this material. My playlists on the Music app are empty. I can find some of the music I purchased on iTunes and iTunes knows that I have purchased the albums (if not the individual songs), but there's no way of downloading them. I've tried to manually move the items over to my phone from my Mac, but that hasn't worked either. Can anybody help??