The FTC and top communications companies are meeting, to determine what they can do to stop robocalls and other illegal calls. Here is a link to a frequently updated page, showing the history and progress of their initiatives, as well as recent Congressional bills. Industry implementations are added after they are announced.
http://www.phonehelp.2truth.com/initiatives.html
(I strongly suggest you read the history and progress of
H.R.2669 - Anti-Spoofing Act of 2015
and
S.2558 - Spoofing Prevention Act of 2016
to learn how [slowly] bills progress through our Congressional system, even when there is bilateral agreement that something should be done.)
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Please reply to this post, to let us know you read it, or have taken suitable actions to protect yourself.