Along with the announcement of the new HD audio streaming option, they have also made updates to both their apps in the Play Store. One for phones and one for tablets. On the phone front, you will now get the option in settings to go to 320 kbps audio and some minor improvements to the app its self. On the tablet side of things, they have added in the same 320 kbps audio setting, some app improvements and also support for Android 4.2.
All of the apps for Sony Music Unlimited are free to install. On the Android side of things, as far as I can tell, you can get a free 14 day trial of the service before you decide whether or not you want to sign up for the subscription or not.
Any Music Unlimited users out there care to comment on the service and the music collection available?
Play Store Links