Add your iPhone 3G application with the new XRoad G-Map which will make your iPhone 3G has GPS navigation system. The XRoad G-Map is standard GPS application, cause not supported with turn by turn direction and also no internet connection for download maps and POIs. It only need 900MB of your iPhone 3G memory. If you want to add this application to your device, you can download now and pay $20. Source: Navigadget.