Nokia (NOK) on Tuesday began ramping up its efforts to compete with both Spotify and iTunes by announcing a new Nokia Music+ service that Lumia smartphone owners can subscribe to for $3.99 per month. Music+, which is an enhanced version of the free Nokia Music service the company launched last year, removes the free service’s limits on how many specialized mixes users can download and effectively lets Lumia users have as much offline music on their smartphones as they want. The new subscription service also significantly boosts the sound quality of music and Nokia claims that it “allows you to download music at six times the existing quality” and lets you “set rules to only download high quality when you’re on WiFi.” Nokia says the new service will roll out over the next few weeks.