text: However, it is illusion of safety because when people need it the most either they can't find it or reach it because they are stuck in car. People shouldn't fully depend on cell phones because they are not reliable, and the trusty solution for the difficult situation is OnStar. OnStar is a service that in case of accident or an emergency will contact you. If you are not able to answer, they will contact police department, hospital and fire service giving them your exact GPS location. Therefore, nowadays cell phones are unnecessary devices because they are unreliable in emergency situations while On Star is always prepare to help you in an accident.