Pact will produce ringtones, audiotones, images.

Mobile media publisher and aggregator Dwango Wireless has formed a licensing deal with Universal Music Group, allowing it to offer ringtones, audiotones and images from UMG artists.

The company says it has already developed more than 700 new ringtones from artists such as the Black Eyed Peas, 50 Cent, Mariah Carey, Nelly and Gwen Stefani among others. They are available via Dwango's Napster Ringtones service.