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PHILADELPHIA (CBS) – Forty billion mobile phone calls are expected to be placed in 2019. About half of those calls will be scams.

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The tech company First Orion says in 2018 nearly 30 percent of all calls were scams, also known as spoof calls.

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One of the most popular strategies is so-called neighborhood spoofing; that’s when the scammer disguises the digits to look like a familiar number on the caller ID.