Verizon Wireless is introducing an evolution of its Song ID service which will now allow subscribers to immediately purchase products related to the track identified.

Verizon is offering the Song ID service as a free download, hoping it will spur sales of its music offerings. Previously, subscribers had to pay for each Song ID use, and it did not offer any purchase options.

Now, once the ID information is received, users can choose to buy the full-track, ringtone or ringback tone with just one click, if available from the Verizon library. The company says the Song ID service can recognize more than 4 million songs from any genre.

The service is available only on select music-enabled Verizon phones.