If you’re a user of the old Tomtom device, download and install the TomTom home software in your computer. After that, connect the GPS device with your computer with the USB cord which came at the time of device purchase. Sign in with your TomTom account if you’ve one or create one if you don’t have an account. Then click on the “Tools” button and go to the “Use Latest map guarantee”. If a new map is available and you’re within the guarantee time period, you’ll see map update. Click on the “Continue” button and start downloading the new map. Click the “Done” button after the process is finished. At last, click “disconnect” button before removing the device connection.