Samsung SYNC SGH-A707

I had to return my old Sync because I was having problems with it. When I selected the music player, I was able to select one of my playlists, start the music, and then press the "back" button to get back to the main screen, while my music was playing. The music ID showed on my main screen. On my replacement phone, I am unable to do that.

Does anyone know what I'm talking about? I called AT&T and they have no idea what I'm talking about, so they referred me to Samsung and they are unaware that their phone could do this.

Can anyone else's phone do this?