"n900 gps" does not display maps at all. Ovi Maps does. As does Sygic Mobile Maps, and numerous other programs. Sygic Mobile Maps are not downloaded on the fly from the internet. Your N900 usually comes preloaded with maps for Ovi Maps for the country you bought it in. It can also download then on the fly from the internet, and will also look for extra/new/updated info if you have an internet connection open. There's a Map Downloader utility for Windows to manually preload maps into N900. Might be useful if you've reflashed emmc.