Sprint Launches Basic Spam-Call Protection for Free
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It Doesn’t Work
It doesn’t work for spoofed numbers. The app won’t recognize a spoofed number as spam.
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There's no "silver bullet" for robocalls. Fighting them effectively requires a number of different technologies. This is just one.
The part that specifically combats spoofing is the STIR/SHAKEN protocol. That can only work well when the whole telecom industry implements it, which will take time.
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