CBS News reported that complaints to the Federal Trade Commission have nearly tripled, from 63,000 a month to150,000. Consumers Union said the technology exists to stop these calls before they reach people's homes, but that phone companies have resisted providing the tools. The phone carrier trade association has said blocking all robocalls would exceed the phone companies' legal authority. But Consumers Union has been arguing that giving consumers the option is well within the boundaries.
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CBS has an article, "five things to know about robocalls"