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Please explain: why would Ooma service, in and of itself, reduce spam calls?

• kwaldman 9y ago
  Many options including blocking anyone not in your contact list. Also include spammer blocking service nomorobo. Comcast also allows nomorobo service for free.
• beamatronic 9y ago
  I had a Comcast phone service a few years ago. Hours after it was activated I was getting telemarketers asking for me by name.