What is cold calling is it good or wastage of time?

What is cold calling is it good or wastage of time? or:What is cold calling is it good or wastage of time?or:It seems to work well enough for people a

What is cold calling is it good or wastage of time?

or:What is cold calling is it good or wastage of time?

or:It seems to work well enough for people and companies to keep using this technique.

or:Cold calling is door to door selling. It works, but if you are not a salesman, it is a waste of time.

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