Forget Globalstar right now, just about useless. Go with Iridium if you can find one. Global star is having problems and said they were gonna fix them last month but no better yet.
Up north here you can usually find them most places, about 100. bucks a week plus air time. Ya 1 or 2 bucks a minute but not meant to be a gissip system its for savin your butt. Normally an Iridium is easy to find but due to globalstars problems they seem to be a bit scarce.
good luck
tz