Dialing and Smiling

A slang term for the practice of cold calling.

Investopedia Says:
When brokers use cold-calling to attract new customers, they typically use a friendly tone of voice to encourages trust.

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Expression for Cold Calling by securities brokers and other salespeople. Brokers must not only make unsolicited telephone calls to potential customers, but also gain the customer's confidence with their upbeat tone of voice and sense of concern for the customer's financial well-being.