The Award-Winning DeLorme In-Reach allows you to stay reliably connected wherever you go. You can end and receive text messages, even while out of cell phone range - letting your friends in basecamp or family know that you have crossed a phase line, milepost or difficult portion of your hiking or climbing route. You will get confirmation of message delivery. And most importantly, you can send Interactive 2-way SOS in a real emergency and communicate with responders to make sure that they understand the nature of your emergency.
The system includes global coverage, and is in the $250 price class.