Some less-than-stellar news for anyone who uses Last.fm on mobile devices has come out of the popular internet radio company's blog yesterday -- the mobile version will become an ad-free, subscriber only feature on February 15. 

That means anyone who enjoys the streaming radio service on his or her smartphone, or other internet-enabled portable device will have to shell out.

Staffer Matthew Hawn made the announcement via his company blog yesterday. He said that Last.fm Radio will remain free on the website and desktop app, and for U.S. and U.K. users of Xbox Live and Windows Phone 7 devices. A full breakdown of supported devices can be found here. 

"In other markets and on emerging mobile and home entertainment devices, it is not practical for us to deliver an ad supported radio experience, but instead, we will migrate to what we believe is the highest quality, lowest cost ad-free music service in the world," Hawn wrote on the blog. "You’ll see that this change brings us in line with other music services that already charge you to listen to music on mobile devices. For the cost of a fancy coffee, a Last.fm monthly subscription allows you to listen to radio across all platforms, on all your devices, and without commercial interruptions." 

Monthly subscriptions to the service are, in fact, quite affordable -- at just $3. Still, the move prompted a number of critical comments.

"May as well just get Spotify to listen to music on mobile then," a user identified as "Jack” wrote in the comments section. His sentiment was echoed a number of others.

User "John" wrote, "It’s been a good run. Thanks for the music but I may as well get Spotify now. Thanks for staying free as long as you did, times are tough!"

"I never understood Spotifys decision to make the iOS devices pay for what you can get for free on the desktop. I always preferred Last.fm for this very reason. Now given the choice between the two paid services I will probably use Spotify," a user named "PeterB" wrote. 

While many users made mention of Spotify, there was also plenty of love for Pandora -- which leads the internet radio game -- in the comments section as well.