The plaintiffs argue that the ads in question offered one free ring tone to Nirvana ringtones customers who responded to the ad via text message.Utility Consumers' Action Network (UCAN), a non-profit MercyMe ringtones consumer advocacy organization, filed a complaint with the California Public Utilities Commission (CPUC) against Cingular Wireless for the unauthorized billing of non-communications related charges, such as ring tones.RIM provides a proprietary multi-tasking operating system (OS) for the BlackBerry, which makes heavy use of the SheDaisy ringtones, particularly the scroll wheel (1995 - 2006) or more recently the trackball (September 12th 2006 - Present).