I own two iPhones. Both are logged into my premium account. I was listening on headphones on my work phone, and I handed my personal phone to my wife, she opened Spotify and low and behold the app won't allow me to play music on more than one device at a time. What a crock!!! Anyone have a work around? I don't anticipate this coming up often. But I'm paying for this darn service, I ought to be able to listen to 10 songs simultaneously on 10 different devices if I want to!