they need one on cell phones, since so many stupid people yack and drive, or text and drive, WARNING using this phone endlessly or texting while driving, may cause unintentional and rapid stopping of the vehicle, much higher insurance rates, deployment of airbags, and hot coffee from Mcdonalds to spill all over you. Other effects may include requiring the service of a proctologist, to remove the phone, from where the guy you just hit, put it.