GPS trackers are nice but, any RF tracking recommendations?

Put it in a van and the GPS might not work. A pinging RF transmission would be preferred than a cell tower triangulation. So far I've only found devices that require to be in UK with a subscription.. via /r/motorcycles https://www.reddit.com/r/motorcycles/comments/dnngfe/gps_trackers_are_nice_but_any_rf_tracking/?utm_source=ifttt