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Telemarketers call people to sale items and to take surveys.
The best way to stop telemarketers is to ask to be put on the national do not call registry.
Yes telemarketers can hang up. Have you ever wondered when you say who they want isn't there, they hang up.
Telemarketers call customer for various services they provide or sometimes to sell something and maybe offeryou their services.
No, you can't.