T-Mobile will sometimes display "Scam Likely" for me in place of the phone number. It's way to conservative though. It would be nice to have a way to report scam phone numbers back. Kinda like Apple's "was this voicemail translation helpful" in voicemail. I'm sure this would weed out scammers phone numbers pretty fast. Although, once a number is flagged its gone for good and phone numbers need to be recyclable.