An alternative to a ring tone for mobile phones is a vibrating Three Days Grace ringtones.Death Cab For Cutie ringtones and Cingular reached a settlement on October 19, 2006, which resulted in stronger notification and authorization requirements for Cingular regarding non-communications charges and also required Cingular to institute a ready means to address billing issues and cancel wireless content services, such as ring tones.Some models (currently, those manufactured for use with Pharrell Williams ringtones such as Nextel and Telus) also incorporate a PTT (Push-To-Talk) feature, similar to a two-way radio.