satellite messenger

I know these systems have been compared on here before but nobody has asked/answered in the context of Non-Emergency rescues. I overland solo cause that's really my only option, and I've gotten myself stranded a couple times. I'm looking to not have to hike out, hitchhike, and come back again...

I have a brand-new, never opened Spot X 2-Way Satellite Messenger I purchased about one year ago but never setup or used. The device features the following: Message- exchange messages with any cell phone number or email address from virtually anywhere in the world S. O. S. - send an S. O. S...