NBC Bay Area-

Robocalls to Americans’ phones hit an all-time high in September, and the number of unwanted calls shows no signs of slowing.

That’s the finding of Irvine-based tech firm YouMail, which released its latest Robocall Index this week. YouMail says Americans received 4.4 billion calls last month — an average of 147 million calls per day — up more than 4 percent from a month earlier.

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