38 nüvi 3500 Series Owner’s Manualsymbol and appear only when the device isconnected to Smartphone Link.Subscribing to Garmin Live ServicesYou must subscribe to Garmin Live Servicesusing the Smartphone Link app on your phone.1 Start the Smartphone Link app on yourphone (page 36).2 Select Garmin Live Services.A list of services and subscription pricesappears.3 Select a service.4 Select the price.5 Select Subscribe.6 Follow the on-screen instructions.About ecoRouteIn some areas, before you can use ecoRoutefeatures, you must purchase an unlock code oran ecoRoute HD accessory. Go to www.garmin.com/ecoroute for more information.The ecoRoute™ feature calculates the fueleconomy and the fuel price of navigating to adestination, and offers tools for improving fuelefficiency.The data provided by the ecoRoute feature is anestimate only. The data is not actually read fromthe vehicle, unless you are using the ecoRouteHD accessory.To receive more-accurate fuel reports for yourspecific vehicle and driving habits, calibrate thefuel economy (page 39).ecoRoute HD AccessoryWhen connected to the ecoRoute HD accessory,your device can receive real-time vehicleinformation, such as error messages, RPM, andbattery voltage. Your device includes data readfrom the vehicle by the ecoRoute HD accessorywhen calculating ecoRoute data.
