The AT&T anti-robocall service will be on by default but customers can turn it off. The FCC’s ruling requires phone companies to allow customers to opt out of the service.
Its competitors, T-Mobile, Sprint and Verizon are also offering services or tools that alert customers if a call is a spam.
T-Mobile is offering its Scam Block and Scam ID service for free. Sprint is charging its customers $2.99 a month for its Premium Caller ID. Verizon is offering its Call Filter for free and Call Filter Plus for $2.99 per month.
U.S. wireless customers received 25.3 billion unwanted robocalls in the first six months of this year alone, according to the estimate of Hiya, a spam-blocking app.
The FCC and the Federal Trade Commission (FTC) have been taking strong enforcement actions against robocallers.
