A true survival story were the people invvolved seemed to do the right thing turned up in the papers a few weeks ago here in the UK. Can't remeber the exact details, but a couple of experienced mountaineers got caught in an unexpected (i.e. not forcast) storm on a planned climb and were stranded. After a day or so they sent a text message to a friend in London who managed to notify the rescue services of their exact location. After a couple of attempts they were brought down safely not much the worst for wear.

Will try to find the article and post a link....