Contact GPS Assistance 844-892-4680 Welcome to www.gpscustomerservice.com The NuMaps Lifetime map update enables GPS user to download the most up-to-date map information for the lifetime of his/her Garmin device. A user can purchase nuMaps lifetime from a retail shop or download it from the official website of the Garmin. Those who purchase NuMaps Lifetime map update from a retail shop need to scratch on the back of the card to retrieve product key.