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TYLER, Texas — No one ever wants to have to call 9-1-1. However, those three numbers have saved countless lives since its first use in 1968.

Each year, there are over 240 million calls into 9-1-1 dispatch services in the U.S., according to the National Emergency Number Foundation. Nearly 80 percent of those calls are made using cell phones. Cell phones have become an indispensable tool in the 21st century…