Inconsistent terms of Premium trial

[DrGuz]

It states on the mobile page (https://www.spotify.com/us/mobile/overview/) that listening is free, without requiring Premium.  When I acquired and ran the android app, it said I had only a 48-hour trial to enjoy listening on mobile, and I see on my desktop app that I have inadvertently activated a Premium trial, which I did not want to do at this time.  And why 48 hours?  Elsewhere on this site, it declares that the trial lasts 30 days (https://www.spotify.com/us/freetrial/tutorial/).

This is all very confusing. 

[licenced]

It is confusing. You're in the US so listening to Radio is free. However, mobile Radio is only available on iOS so for Android the only way to listen is to have a Premium subscription