If you prefer to get the device contract free it will cost you $439.99, Interestingly the Lumia 920 costs more than the much newer and sleeker Nokia Lumia 925, which is priced at $430 off contract on the same carrier.
The Lumia 920 runs the Live Tile based Windows Phone 8 operating system, but includes exclusive apps from Nokia which greatly add to the appeal of the handset. You have the Nokia navigation suite which includes Nokia Maps, Nokia Drive and Nokia Transport with offline maps for your convenience.
source - WPCentral