This has been floating around the interwebs.  I thought it sounded like an urban myth, or perhaps wishful thinking, but it seems real enough.  Apparently it happened on Mount Elbert, about a year ago and the guy eventually found his way back to his car after 24 hours.

According to the New York Post, the rescue team posted on Facebook 'If you’re overdue according to your itinerary, and you start getting repeated calls from an unknown number, please answer the phone; it may be a [search and rescue] team trying to confirm you’re safe!”  Which has the implication, of course, that it may not.

But they didn't name the hiker.  I'd have named him. But maybe they didn't know his name, only his number.