Quote Originally Posted by keigan
does gps work w/o being in service, or do i have to pick a plan already and subscribe in order to use gps? how do maps work? do i have to download/install them, are they preloaded or do they download via gps sat? im new to gps, so after this post i'll be checking if there's a guide on this site. thx 4 answers in advance!
GPS works as long as you can get locks on the GPS satellites. The satellites do not provide maps.

Maps, which actually make the GPS positioning information useful, require a data plan and coverage as they are downloaded on the fly. Some apps will download what they need when you start navigation.