The “Spam Likely” determination is fairly unreliable, IMO. They have labeled my doctors office “Scam Likely”, while many “Scam definitely” calls have not been labeled.
T-Mobile's handling of "Scam Likely" seems to be spotty at best, with quite a few false positives. Additionally, their 3rd party vendor seems to be wanting to audit businesses that are mis-identified: https://feedback.fosrvt.com/
I haven’t had a single false positive. I get 1-2 false negatives per week but haven’t found an iOS call blocker which had comparable or better accuracy.
That’ll probably require fixing the broken design of the telephone system.