you need to subscribe... their subscriptions are quite expensive.
Actually this thread got me to look into it more. I found that if you don't want all the bells and whistles of a smartphone getting a tri-mode sat phone may actually not be that bad of a deal if you can find or build the batteries when you need them. I just bought a gsp-1600 for about $120, bear in mind the sat functions are $25-40+ on average plus tax / month which is as much as a blackberry dataplan these days, however you don't need to activate it to use it as a cell phone. If things go bad or get questionable like serious war breaks out your cell provider goes down eg. there are serious issues you can always see if the sat network is still running although it would probably get clogged fast.. also the other benefit is that it can be used almost anywhere in the world, even in areas without cell towers, including or emergency purposes such as coastal areas and the north.