T-Mobile First to Launch Caller Verification

Yeah but to use that T-mobile sells your location data

I kept my number from a city I lived but has almost zero connections right now. It makes things simple as every time I received a call with the same area code, I can be sure it's a scammer.

Only on Galaxy Note9...

Why is this device specific?

9/10 phone calls I get are spam/scam nowadays...

Chicken and the egg problem. Few carriers support it, so they can't block unverified calls (yet).

So the most they can do is log (display) when a good call comes through. I imagine this requires cooperation on the manufacturers part to alter the phone app to display a verification success.

I have t mobile and some calls come in with a caller I’d as “scam likely” so they do stuff like that

One thing they already did is display "Scam Likely" for some calls. This is on an iPhone, but I think it's a T-Mobile thing. It misses a ton of spam calls from numbers that match the first six digits of my own number, and had at least one false positive, which was my bank calling.

How does this work when ANI information is spoofed from a landline?

Is ANI spoofing a thing? Caller-ID is easy to spoof, but I thought ANI was in Telco hardware.