Nope they have to have it in place by June or July of this year I believe. If the software allows it I will drop any unsigned calls immediately, don't even let them go to voicemail. Let them keep shouting into the void. No I don't care if it causes some companies issues. I'm sick of spam calls. My car warranty is doing just fine.
It’s a good point. At the device level we don’t really have the same controls as we do with email spam. Maybe a 3rd party app like RoboKiller will be able to detect that unsigned call but I have a feeling this won’t be the case.