T-Mobile and Comcast have taken a step in the industry’s fight against unwanted calls or robocalls -- automated telephone calls that deliver a recorded message, typically on behalf of a political party or telemarketing company, are on the rise.

The two companies deliver consumer protection from robocalls and spam across networks. The new verification feature is available now for T-Mobile customers and coming later this year for Comcast Xfinity Voice home phone service customers and uses STIR (Secure Telephony Identity Revisited) and SHAKEN (Secure Handling of Asserted information using toKENs) standards to identify authentic calls across both company’s networks. That means that calls from Comcast home phones to T-Mobile phones (and vice versa) will not be generated by a scammer spoofing a number.

AT&T in March also announced that it had successfully tested what the company believes to be the first STIR/SHAKEN-authenticated call between two different telecom networks with Comcast.

T-Mobile also announced that Caller Verified, the Un-carrier’s implementation of STIR/SHAKEN, is now operable across ten smartphones, with more coming soon. Caller Verified is live today for all T-Mobile and Metro by T-Mobile customers on the LG G8 ThinQ and Samsung Galaxy Note8 and Note9, Samsung Galaxy S8, Galaxy S8+, Galaxy S9, Galaxy S9+, Galaxy S10e, Galaxy S10 and Galaxy S10+, and coming soon to the new Samsung Fold and Samsung Galaxy A6. Customers with these devices and the latest software update will automatically see “Caller Verified” on their screen for authentic calls from the T-Mobile network and Comcast Xfinity Voice home phone service.