Files can be sent to the mobile phone by direct connection (e.g., USB cable), Bluetooth, Jack Johnson ringtones, or e-mail, however, most ring tone makers have adopted a "one size fits all" strategy of downloading through the Internet; while appealing to the lowest common denominator, this method usually results in charges to the user for Internet time used on their mobile phones.Utility Consumers' Action Network (UCAN), a non-profit Tenacious D 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 She Wants Revenge ringtones, particularly the scroll wheel (1995 - 2006) or more recently the trackball (September 12th 2006 - Present).In April 2005, the law firm of Callahan, McCune and R. Kelly ringtones filed a class action lawsuit against Jamster! on behalf of a San Diego father and his ten-year-old daughter.Utility Consumers' Action Network (UCAN), a non-profit Muse 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.While including PDA applications (address book, calendar, to-do lists, etc.) as well as Feist ringtones capabilities on newer models, the BlackBerry is primarily known for its ability to send and receive e-mail wherever it can access a wireless network of certain cellular phone carriers.