This is why a tracking device with Jamming Detection is useful for fleet businesses. Such as this one : https://www.rewiresecurity.co.uk/db1-lite-compact-gps-tracker-tracking-device

Not worth the effort if you ask me. GPS tracking devices have come a long way over the years and you can get a solid tracker that’s designed for the task for 60-70$ Check out Rewire Security :https://www.rewiresecurity.co.uk/gps-tracker-car-tracking-devices

Check out this company for affordable trackers :