Nokia Music for Windows Phone - Why can't I see the option to subscribe to MixRadio+?

MixRadio+ is only available in selected countries and on MixRadio application version 3.6 or later.

Currently available in Australia, Austria, Canada, Finland, France, Germany, Indonesia, Ireland, Italy, Mexico, Netherlands, Norway, Poland, Portugal, Russia, Saudi Arabia, Singapore, South Africa, Spain, Sweden, Switzerland, Thailand, Turkey, UAE, UK, United States, Vietnam.

To check your MixRadio application version number, go to Settings > About.