Service coming via SunCom Wireless.

Napster’s mobile music service, created in partnership with Ericsson, will soon be available in the U.S., through a small wireless carrier called SunCom Wireless.

The service allows users to buy full-song music downloads through a Napster-branded interface on their mobile phones. It also includes downloadable ringtones and artist images. SunCom provides service in the Southeast U.S., Puerto Rico and the U.S. Virgin Islands and has about 1 million subscribers.

This is the first U.S. implementation of the Napster Mobile service. Napster and Ericsson first announced their intention to develop the service last June, and unveiled the system at the 3GSM wireless industry conference in Barcelona this week.

Like the mobile music stores offered by Sprint and Verizon Wireless, Napster Mobile offers a dual-delivery option, which provides a copy of a purchased song to both the mobile phone and a home computer. It also includes a music recommendation engine that suggests tracks based on each customer’s personal usage and preferences.

Pricing for each track is set by the carrier, which SunCom has not yet revealed.