When operating a CMV: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question When operating a CMV: Answers You may make a phone call by pressing multiple buttons. You can send text messages. You may send text messages, but only to your employer. You are not allowed to press more than a single button on a cell phone to make a phone call. Explanation While operating a CMV, you may not make voice calls if you need to hold your phone or press more than one button to do so. Additionally, you may not send or read text messages while driving.