I have a load of albums in the Amazon Music library due to various vinyl LPs and CDs I have bought over the years, which I have never made use of to listen to digitally. I was wondering if anyone can tell me if I have to be a paid up member of Amazon Music in order to listen to the library whilst out and about, via my mobile phone? I have a free 3 month trial of Amazon Music available but was just wondering if it is absolutely necessary in order to listen to the files I already have in the library, if that makes sense.