As soon as I see "UNAVAILABLE" on the CID device I hit the "block now" button on my blocker device.
If they want to hide there identity then I'll help out by blocking their number forever.
Called me claiming to be PG&E and said they could help save me money on my bill each month at my address. They never said my actual address but just kept referring to it as "my address." So when I asked what my home address was they made up some bs address and I told them to stop scamming people. Do not fall for this trick