Aftermarket & Accessories; Hum by Verizon; Hum by Verizon is the Technology Designed to make Almost any Car Smarter, Safer Connected. With Hum, Users Gain Access to Vehicle Diagnostics, which Alerts them to Small Car Problems So They Don’T Become Big Ones, a Certified Mechanics Hotline for Unbiased Advice from a Car Expert, Pinpoint Roadside and Emergency Assistance which can Send help When Needed, and more. the Hum System is made Up of an Easy-To-Install Obd Reader, Speaker and the Hum App ...