Popular music platform, Spotify is getting ready to unveil an ad-supported, free streaming service for mobile devices. The new service would not require users to pay for the streaming service that Spotify provides.

Until now, users could only access a free version of Spotify on their desktop or laptop computers. If users wanted to stream the music on their mobile devices they paid a $10 a month fee, which delivered on-demand music from its 20-million song catalog on any device.

The Wall Street Journal reported that the music company has reached a deal with all three of the global music companies, Sony, Universal and Warner Music Group, to use their recordings on the new service.

The three major music labels have stake in Spotify and want to see an increase in the subscriber base.

NBC News reported that many journalists had been invited by Spotify to an event on Dec. 11, without telling them what product was going to be announced. It will likely be the free streaming model.

Spotify has currently 20 million active users worldwide and 6 million are paying subscribers.