This depends on the type of building, it should be noted that trackers work via GPS and they must be able to communicate with a GPS Satellite. Should the device be in an underground car park its possible it won’t function until it comes back above ground again. There are a small number of areas up and down the UK that have poor coverage, we have been able to limit this to a minimum with the type of antenna installed in all the Bluhuski tracking devices. See our “Disclaimer” on the “T&C’s” page.