I agree with the previous globalstar comments, I rented one last year on a solo selway elk hunt, thing didnt work worth a damn, I was at the very top a couple of times, had all the bars, as far as single is concerned and the dang thing would cut out after 20 seconds of conversation. The price was right, somewhere 100 bucks total for the phone and a 30 minute air time package, but what good is that if it doesnt work.