OK, let us suppose I want to be a law biding, up right American and use only a cellphone for the "right" area.
I drive a big truck OTR. I usually know what part of which state I am in, but I frequently do not know which part of what state I will be in in 24 hours.
What should I do?
As previous messages have explained, mobile 9-1-1 uses a variety of GPS and tower info to determine where you are. Telcos, stupid though they may be, have figured out that people with mobile phones are likely to be, you know, mobile. If you drive a big truck, you're likely to spend a lot of time on major highways, and many of those highways have signs that tell you what to dial to contact the appropriate police for that road, e.g. *MSP on the Mass Pike. R's, John