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Re:Washington’s new anti-robocall law won’t stop the calls by mehrdadn on Thursday December 26, 2019 @06:43PM (#21887851)
Do you know how this will actually solve the problem? Like will they actually let customers block calls without the desired level of attestation?
Re:Washington’s new anti-robocall law won’t stop the calls by yellow_lead on Friday December 27, 2019 @01:50AM (#21889675)
On cellphones, no/C attestation can show up with "suspected spam". I believe T-Mobile does this today somehow, possibly a line under the caller ID.

Whether or not it's a premium service will probably depend on the carrier.

As for your original question (blocking), I'm not sure. It's certainly in the realm of possibilities and carriers' fraud departments will have to decide what to do with it.