https://arstechnica.com/tech-policy/2019/08/us-phone-carriers-make-empty-unenforceable-promises-to-fight-robocalls/

Phone companies and attorneys general from all 50 US states are touting a new agreement to fight robocalls, but it won't actually do much to help consumers.

The top wireless carriers and home phone providers promised attorneys general from every state and the District of Columbia that they would offer free robocall blocking and take other steps to fight robocalls. But the agreement imposes no legally binding requirements on phone providers. "Failure to adhere to these principles is not in itself a basis for liability," a disclaimer on the agreement notes.