Do I need a monthly service plan?

No. Though you won’t have access to Raven’s LTE features, you’ll still be able to use Raven as a dashcam for full length videos, gesture triggered videos along with time lapses. You’ll also be able to use Raven’s displays to show driving data such as speed, compass, fuel, altitude etc. In the app, you’ll have access to the media manager, settings, historical trips and historical driver reports from the time where service was active.