First time Spotify user here. Trying to download an album for offline use. I am on a WiFi connection. Plenty of bandwidth (60mb/s). I have tried on two differnt wifi networks now. 40+ gigabytes free on my phone. Song says to "go to settings to download using cellular". I do not want to download over cellular! I only have a 2GB data plan and I only want to download off of Wi-Fi. Why can't I download off of WiFi?!