Syncing playlists between Ubuntu and Android smartphone I'm looking for a simple and reliable way of syncing music playlists between Ubuntu and an Android smartphone. Some time ago I was using Banshee, but then it suddenly stopped working. My understanding is that Banshee still puts *.m3u files to Music/Playlists folder but the smartphone does not see them. I tried to use Rhythmbox instead but it also does not seem to work.
Spotify allows you to sync your local files to a mobile device (no subscription required). Of course this requires the desktop client installed on a computer and the app installed on a mobile device. Once your local files are downloaded to the device, you can listen to them whenever and wherever you want. It also does not require a data connection (after downloading). 

*Note: the later versions of Android client have had issues with this. Give it a shot anyway! The only workarounds are to install an older version of the Spotify app and then download your playlist.