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Tony Quartleft a comment
I will try this shortly. Until now, I usually just ignore those calls. IT's a waste of time talking to them. Sometimes I also look up the numbers on Google or some complaint boards like http://whycall.me to see if people have reported certain numbers as spammers, and then I will just block them manually. Thanks for making this app, Jason!

CallthenticIntelligent prevention of spam calls on iOS.
