I saw this advertised on TV last night for the first time and was intrigued.

Most of the time I fish alone, not by choice, and I have had 2 heart attacks. As a result, I am very careful about where I fish, and have decided not to fish in some places because of lack of phone service. If you break a leg, you can probably last a day, but if your ticker acts up I think you would like help to get there a little quicker!

I am definitley going to check these out.