From The Press Enterprise 12/15/15
A person must have a data or text plan in order to use the service.
Texting a 911 operator is a little different than messaging a friend. A caller will use 911 as the phone number, type a message and send a text message. A cell tower will read the signal, determine the phone’s location and relay the information to the nearest dispatcher center.
There, the text message will appear on the dispatcher’s screen along with a map showing the phone’s location. Depending on the carrier, the accuracy will be spot-on or off by as far as 2 miles, said Cyndee Freeman, communications manager for the Sheriff’s Department.
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