In order for "Play Song" or "Play Artist" to work, you need to connect your iPhone (not sure about Androld) to the USB port in the compartment next to the gear stick. Connecting it to the cigarette lighter won't work. Once you connect your iPhone to the USB port it will start uploading the info to the nav system. It will take a while (over 20 minutes I think for 1500 songs, approximately). Then and only then will the menu allow you to say "Play Song". Also, if it is updating its database (say, if you added 10 songs later), it will say it is busy and to try again later. If the song's name is like "Piano Concerto No. 2" and you say "Number 2", you'd be out of luck. Also, it cannot understand languages other than English. I have a Russian artist named "Игорь Крутой" pronounced "Igor Krutoy" and it has no idea what I am saying. Piece of *BLEEP*. Honestly, the voice recognition system in the Lexus sucks. I have a friend's name in my Contacts list name "Ed Cohen." It couldn't understand "Ed" unless I say "Ee Dee Co Hen".