Free Scout Version will require Network Data coverage to work properly. In most cases if you are on a straight away, continue until Network data picks you up again.
Premium Scout Subscription - with installed Map region will seamlessly go into “Always There Navigation mode” when Network Data is not available. This is a premium feature that will allow you to get navigation instructions with audio when Network Data is not available. To enable Always There Navigation mode when you are out of data network, you must first download regional map data with a WiFi connection prior to being out of network.