T-Mobile: Now 100% compliant with FCC’s STIR/SHAKEN protocols


T-Mobile has completed its implementation of the Federal Communications Commission’s STIR/SHAKEN protocols. And along with its completion, the Un-Carrier has filed for a certification of completion. Once it obtains the certification, T-Mobile promises that all calls coming from its network are 100% compliant with the FCC’s Robocall Mitigation Database. 

Apart from the STIR/SHAKEN protocols’ Number Verification, T-Mobile also provides free Caller ID under its Scam Shield protection. These features both give customers an assurance that the calls they receive have not been spoofed. Free Caller ID is also provided to all T-Mobile, Metro by T-Mobile, and Sprint individual, family, and business customers. 

“Number Verification, along with Caller ID, and the scam identification and blocking tools in Scam Shield, gives our customers the industry’s most comprehensive free scam and spam protection,” T-Mobile Consumer Group Executive Vice President, Jon Freier, said. “We were first to implement number verification in 2019 and today, all calls originating on the T-Mobile network are 100% STIR/SHAKEN compliant, giving our customers peace of mind that their calls are protected against scammers and spammers.”

T-Mobile was the first wireless provider in the country to work with the other major networks to implement the protocols. T-Mobile achieved this in March, which allowed them to further fight number spoofing. As a result, T-Mobile is able to authenticate calls with providers that collectively represent around 98% of wireless customers in the country. 


Source: T-Mobile

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  • Sayahh

    Still getting scam likely calls, but I chose to swt only the scam alert and not scam block.

    • Shaun Michalak

      I do not trust the “scam likely” title that they use.. From my experience, either the number is in your phone book list, or it says scam likely.. I have had my doctors office call to ask me stuff, and because it was not in my list, it came up as scam likely..

      • Jonathan

        Same here, I’ve actually had friends blocked by the scam block. I have spam block and spam ID turned off.

  • Robert Alverson

    Android phone now can do call screen for detected scam calls. So far most hang up on that and I don’t get bothered at all.

    • dcmanryan

      I had that on my Pixel 3 XL and the calls at the time got worse because it showed the number as good and someone picked up. That’s what I’m assuming anyway.

  • rene

    still today with paid scam id on on tmobile services i get a ton of calls from scammer from dentist to amazon charge double fee, dont see how that is working

    • dcmanryan

      Compared to my Verizon work phone I get far less spoofed numbers on my T-mobile personal phone but I still get them.

    • Shaun Michalak

      I have a VOIP service, and have the calls forwarded to my T-Mobile cell.. I noticed that the number of calls that make it through to my cell that are spam are only a fraction of what we get that are not forwarded.. So IMO, I can see a huge difference on the number of calls getting stopped that are spam..

  • UniBroW

    “silence unknown callers” is one of my fav iPhone things

  • spyncycle

    As of July 15 I’m still getting more than ten spoofed calls every day.