A pay telephone on a busy Detroit street corner could once net $200 a week in just coins. But that was 30 years ago. These days, Greg Andrick is lucky to find $5 or $6 in a pay phone's change box ...

No matter where you are, if your phone displays a network name (as opposed to "no service" or a similar message) it is wirelessly connected or attached to a cell. When you come in range of a cell, it ...

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