I called 911 from my cell phone for a carbon monoxide detector incident and they had no idea where I was. I was transferred around multiple times and gave my address more than once. It took multiple minutes to get the call completed and it was probably at least 10 minutes before the fire department arrived.<p>Contrast that with my childhood neigbor pranking 911 from my home phone in the early 80s. The police knew where the call came from and showed up promptly.