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A short code is similar to a phone number, but shorter, and it can only be used for messaging. Short codes can only be used from mobile phones. They cannot by used to place voice phone calls. Short ...

A code that prevents a wireless phone from unauthorized use. When explicitly locked, and each time the phone is turned on, it will prompt the user to enter the code before it will allow a call to be ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Eric's career includes extensive work in ...