Napster and AT&T said on Monday that they had agreed to a deal to provide some of the top U.S. phone company's wireless and high-speed Internet customers with free digital music.

The service will be available beginning April 1 and will enable qualifying users unlimited access for one year to more than 3 million song tracks through Napster To Go. Those customers can transfer some tunes to compatible wireless phones and music devices.

The offer is available to qualifying new or existing AT&T wireless customers outside of the AT&T's traditional 22-state territory who agree to a two-year wireless agreement with purchase of the SYNC phone by Samsung, or the BlackJack phone.