[Bud]

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

[beamatronic]

I had a Comcast phone service a few years ago. Hours after it was activated I was getting telemarketers asking for me by name.

[kwaldman]

Many options including blocking anyone not in your contact list. Also include spammer blocking service nomorobo. Comcast also allows nomorobo service for free.