"The commission's recent action builds on a year-long effort to enable broader adoption or call-blocking tools and allow providers to better protect their customers and networks," AT&T said in a statement. "AT&T remains committed to working with our government and industry partners in the ongoing battle against unwanted and illegal robocalls."
AT & T's service will attempt to block fraudulent calls and alert customers when a call may be spam. It will be available on all new lines and added in the coming months to existing customer lines. Those customers will be notified by text when the service is active.
The company already provided call blocking to mobile customers who downloaded the AT&T Call Protect app or opted in via their account settings. Landline customers had also been able to opt in. Now, AT&T customers will only have to opt out via their account settings if they don't want to have calls blocked.