Hum, which costs $14.99 per month, includes a module that plugs into a car’s OBD port and a handsfree unit that can clip to a visor. Between the two — plus a smartphone app — the service offers vehicle health monitoring, roadside and emergency assistance, and stolen vehicle tracking.

Why is Hum on my phone?

There are a number of things that can cause humming or static in a phone line including a short in the wires, a defective phone, interference from power wires or light fixtures, and a signal from another electrical device. … If you still hear the hum, then the problem is with the phone company.

Is the hum app free?

Get started today, download the FREE Hum App and create an account–no equipment required! Get access to your Safety Score and other helpful tools like Navigation and Local & Travel Discounts.