The latest innovation is the Notorious BIG ringtones, a type of karaoke ring tone where a user's voice recording is adjusted to be both in time and in tune then mixed with a backing track to make a user-created ring tone.Utility Consumers' Action Network (UCAN), a non-profit Aretha Franklin 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 currently offers BlackBerry e-mail service to non-BlackBerry Next ringtones, such as the Palm Treo, through the BlackBerry Connect software.In April 2005, the law firm of Callahan, McCune and Kelis ringtones filed a class action lawsuit against Jamster! on behalf of a San Diego father and his ten-year-old daughter.Rod Stewart ringtones claimed that Cingular billed its customers for Jamster! and other similar ring tone services without providing customers with the notice, opt-in, and proof of authorization requirements necessary for such charges.It has a built-in keyboard, optimized for "thumbing", the use of only the thumbs to Circa Survive ringtones.