Disjoint issues really. Phone scams mostly rely on the shoddy/lack of verification of caller id info as calls transit the network where it's not verified so they are unblockable (because they just use a different fake number every time). They're actually calling from one or a pool of numbers but you can't block and report them on the receiving end because the number your phone thinks it's blocking isn't theirs. This will do nothing to fix spam/scam without patching the issues with caller id.
It is actually because you can't do anything with the source phone number being tied to an identity if the scammers are freely able to spoof the number that the end networks and users see. Even if every network in the world adopted this it wouldn't matter if caller id isn't fixed so that you can actually see the source number to go ask who it is!
From your link: "The scam-blocking service is based on modern cloud technology, and it’s scalable, and easy to deploy" - I don't think we need another SaaS parasite for this as protocol-level solution like STIR/SHAKEN is a better approach IMO. The problem is that operators are not incentivized to do anything with spam/scam.
I don't understand how this isn't the default. I get multiple calls every week, sometimes many per day, from people saying I called them. This has been going on for years... (Portugal)
The telephone system design stretches back to the days when it operated purely electro mechanically so there wasn't even the data to know who the original caller much less a way to implement validation to ensure the call was actually from that number. That plus common carrier rules (at least present here in the US) required all the networks to connect every incoming call to prevent them from blocking out competitors. CallerID is a late addition patch on a system designed to remain compatible with the old exchanges and countries have only recently (in legal and bureaucratic terms) modifying laws to allow for blocking and screening.
As finn. I can verify scam calls are non-existent lately few do occasinally popup, but its like 2000 times better than before. When i learned about this originally, i was shocked like how this is not default?
Gotta remember the phone system used to run on electromechanical relays not digital systems and the digital upgrades since then were designed to be compatible with the old systems with common carrier rules requiring networks to route calls by default so blocking and verification weren't really built into any of the systems and interfaces between carriers.