AT&T Inc. is making Napster Inc.’s entire music catalog of more than 5 million songs available for wireless download starting early next month.

The service, which AT&T is unveiling Monday, will expand the company’s over-the-air download offerings beyond the independent music it offered through eMusic.com and allow it to compete with offerings from rivals Verizon Wireless and Sprint Nextel Corp.

San Antonio-based AT&T has not yet announced which devices will work with the new music service.

The new service will not work with Apple Inc.’s iPhone, which is tied to Apple’s iTunes service and allows users to load music only from their computers or when they’re connected to a Wi-Fi network, not through a cellular signal.