Quoted from http://reviews.cnet.co.uk/mobiles/0,...9288967,00.htm

"Nokia's GPS application -- which goes by the rather dull name of 'Maps' -- is very different from other portable navigators, or previous sat-nav phones from Mio and HP. Instead of storing street-level maps of the whole country, the N95 downloads local mini-maps, routes and even voice commands on the fly. Each map covers about 0.5 miles around you, so it's essential that you're on a reasonable mobile Internet tariff, and ideally an all-you-can-surf package such as T-Mobile's Web and Walk or 3's X-Series."