Your TomTom GO Navigation app can run in the background so you can use others apps, for example, your phone app. If you are driving a planned route, you will continue to hear driving instructions, sounds, and warnings.
Select Settings in the Main Menu, then select Other, then Run in Background.
Select Run app in the background to allow the app to run in the background.
When the app is in the background but inactive, your device will eventually close the app.