Mine says beta I just recently got my update from windows phone 8.0 to 8.1 and now i have cortana . Before i go on my opinion I like to state i went windows phone becasue i was a zune user and basically windows phone 7 is the zune os and well i loved it and the way it handled music. I was a rhasody user and switched to zune bacause hated the way the real/ rhasody software worked . Ok now jump forward i get my 8.1 update for my lumia 1520 and the music app runs slower does not show up my music on the sd card for literally 4 to 5 sec this is unsatifactory and now in the library does not have albums sorted by year. and it using my data more with the streaming feature ok i turned that off so thats solved . now cortana bug i found when uysing a wired headset i love using the the text to voice feature of previous windows phone i bicycle everywhere and it handing for text can text back and keep pedaling . now that cortana takes over if i am listening to music and i recieve i talk may way through listening to text and replying like usuall it longer than without cortana but it does respond better but than i am done and volumn of returningmusic is reduced well i think it is but have it playing through headphones and have through phone when on bike did not notice . But this happen on a day was on bus everyone turned around looked at me i play metal not the norm for most people this has consistantly happening so i turned off cortana and using the old way for now. So that being said music and cortana have a long way to go