Phone spam and fraud is a pervasive problem threatening the consumer voice experience. In Q1 2023, one quarter of all unknown calls received by consumers around the world were spam and fraud — that’s more than 73.6 million spam and fraud calls per day. As operators and regulators have taken steps to address the spam and fraud problem, the practice of number rotation — where call originators switch phone numbers to avoid flagging — has emerged as a direct response.

 

Jonathan Nelson explains the practice of number rotation and how it threatens trust in the voice call, including: