making a concerted effort to clean their networks of spammers, scammers, and number spoofers, as AT&T follows T-Mobile's suit in implementing the SHAKEN/STIR standard to offer its customers a little more peace of mind when receiving a call from someone they don't know.Well, at least two of the "big four" American wireless service providers are
Of course, this doesn't technically defend you against robocallers using legit phone numbers, but AT&T has other mechanisms in place just for that. The carrier's Call Protect service includes everything from automatic fraud blocking to spam risk blocking, nuisance call warnings, and a personal block list tool, which is pretty great for something available at no charge to "millions of mobility customer lines."
Unfortunately, both Call Protect and Call Validation are currently only available on three high-end Android devices. Namely, Samsung's Galaxy S10 and S10+, as well as the LG V40 ThinQ. If it makes you feel any better, you don't have to do anything special to get the newly released feature enabled on the aforementioned smartphones. You will simply start seeing a green checkmark and the words "Valid number" on your handset's display when an incoming call is authenticated. That's a small step forward for one carrier and... an even smaller one for the wireless industry as a whole.