[Philip Lelyveld comment; The main point of the story is that inaccuracies in GPS info reported by the cellphone make delivering emergency services (police, fire, ambulance) more difficult. The dispatchers know what the problem is, but the location information can be hundreds of yards away from the person's actual location.
According to the U.S. Centers for Disease Control and Prevention, 38% of US households have now given up landlines and are solely on cellphones. 75% of emergency calls in California in the last 18 months were placed from cellphones.]
See the full story here; http://online.wsj.com/news/articles/SB20001424052702304579404579231913503559556