T-Mobile Completes Spam Prevention Rollout, Now Authenticates Calls From 98% of Wireless Users

T-Mobile today announced that it is the first U.S. wireless provider that has managed to complete deals with all wireless networks to implement full number spoofing and spam call protection for customers.

tmobilescamshield
With these partnerships in place, T-Mobile has completed its implementation of the STIR/SHAKEN standards that are in place to combat illegal caller ID spoofing. T-Mobile is now able to authenticate calls with wireless and network providers that represent 98 percent of wireless customers in the United States.

tmobilescamshield2
T-Mobile offers a "Scam Shield" Un-carrier feature that susses out and blocks scams and robocalls. The company has been working on improving Scam Shield, and its new partnerships with Spectrum Voice and Charter Communications ensure number verification across almost all providers in the U.S. to authenticate incoming calls for T-Mobile customers.

"T-Mobile was first to implement number verification in 2019 because protecting customers against scammers and spammers is one of the most important things we can do as an industry," said Mike Sievert, CEO T-Mobile. "To date, T-Mobile has protected over 80 million customers from more than 33 billion suspect calls - and counting. With the combination of Number Verification, free Caller ID and the scam blocking tools in Scam Shield, and by working with network providers of all sizes, we are providing the industry's most comprehensive scam and spam protection for free to all our customers and working every day to make scammers jobs impossible."

The FCC is requiring all carriers in the United States to implement STIR/SHAKEN by June 2021, so other major wireless providers like AT&T and Verizon will need to add the same protections for their customers.

T-Mobile's Scam Shield is a free Caller ID tool that warns customers when a number calling is likely to be a scammer, and there's an option to block scammers entirely.

AT&T and Verizon have similar spam caller prevention tools, but both charge for premium access. AT&T charges $3.99 for features that include Caller ID (though it is included free in the highest tier unlimited plans), while Verizon charges $2.99 per month for Caller ID. Both AT&T and Verizon are working to implement STIR/SHAKEN for identifying spoofed calls.

Popular Stories

Apple Logo Spotlight

Report: Apple to Launch These New Products in 2026

Sunday November 2, 2025 5:34 am PST by
Apple is planning to launch at least 15 new products in 2026, according to Bloomberg's Mark Gurman. Gurman outlined what to expect from Apple in 2026 in the latest edition of his "Power On" newsletter. He said the company is heading "into one of its most pivotal years in recent memory," with the rollout of major new Apple Intelligence features, intense regulatory pressure on the App Store,...
Apple Intelligence General Feature 2

New Version of Siri to 'Lean' on Google Gemini

Sunday November 2, 2025 6:06 am PST by
In his "Power On" newsletter, Bloomberg's Mark Gurman today provided an update on the status of Apple Intelligence and the plans for it in 2026. Apple is still planning to roll out its revamped version of Siri around March of next year. The release should be accompanied by the release of a new smart home display product with speaker-base and wall-mount options. A new Apple TV and HomePod...
HomePod mini and Apple TV

New Apple TV and HomePod Mini Likely Launching Soon

Sunday November 2, 2025 5:49 am PST by
A new Apple TV and HomePod mini could launch as soon as this month, Bloomberg's Mark Gurman today suggested. In today's "Power On" newsletter, Gurman said that Apple retail stores are planning an overnight refresh on the evening of November 11, where changes will be made after closing, such as refreshing displays and placing new products for the following day. The timing of the overnight...
iOS 26

Apple Releases iOS 26.1 With Liquid Glass Toggle, Slide to Stop Alarm, New Apple Intelligence Languages and More

Monday November 3, 2025 1:11 pm PST by
Apple today released iOS 26.1, the first major update to the iOS 26 operating system that came out in September, iOS 26.1 comes over a month after iOS 26 launched. ‌iOS 26‌.1 is compatible with the ‌iPhone‌ 11 series and later, as well as the second-generation ‌iPhone‌ SE. The new software can be downloaded on eligible iPhones over-the-air by going to Settings > General >...
Early Black Friday Deals 2

The Best Early Black Friday Apple Deals

Sunday November 2, 2025 10:04 am PST by
We're officially in the month of Black Friday, which will take place on Friday, November 28 in 2025. As always, this will be the best time of the year to shop for great deals, including popular Apple products like AirPods, iPad, Apple Watch, and more. In this article, the majority of the discounts will be found on Amazon. Note: MacRumors is an affiliate partner with some of these vendors. When ...
iOS 26

iOS 26.1 Available Today With These 8 New Features

Monday November 3, 2025 5:54 am PST by
Update: Apple has released iOS 26.1. Following more than a month of beta testing, Apple is expected to release iOS 26.1 this Monday, November 3. The update includes a handful of new features and changes, including the ability to adjust the look of Liquid Glass and more. Below, we outline key details about iOS 26.1. Liquid Glass Toggle iOS 26.1 lets you choose your preferred look for ...
Apple Foldable Thumb

iPhone Fold: Launch, Pricing, and What to Expect From Apple's Foldable

Friday October 31, 2025 8:52 am PDT by
Apple is expected to launch a new foldable iPhone next year, based on multiple rumors and credible sources. The long-awaited device has been rumored for years now, but signs increasingly suggest that 2026 could indeed be the year that Apple releases its first foldable device. Below, we've collated an updated set of key details that have been leaked about Apple's foldable iPhone so far. Ove...
apple one  cpqesecbv342 upscaled feature

Apple One Gets New Colorful Logo Following Apple TV Rebrand [Updated]

Monday November 3, 2025 3:22 pm PST by
Apple updated the logo and name for its Apple TV streaming service today, and it looks like Apple One might be next. On the revamped Apple TV website, there's a new, more colorful Apple One logo available. The logo features an Apple icon that's split into six slices, and each slice includes the color that Apple uses for one of the services included in Apple One Premium. Apple One is...

Top Rated Comments

yaxomoxay Avatar
60 months ago
But what if my car warranty is expiring for real?!?!?
Score: 54 Votes (Like | Disagree)
nutmac Avatar
60 months ago
Currently, iOS merely displays a tiny checkbox under each STIR/SHAKEN verified phone number/name in Recents tab. That is not enough.

At the very least, it should display more prominent icon on the incoming call screen. Furthermore, Silence Unknown Callers should be expanded to:

* Silence Unknown Callers: Callers not in Contacts, outgoing calls, and Siri Suggestions
* Silence Unverified Callers: Callers not verified by STIR/SHAKEN.
* Silence International Callers: Callers not in local region (e.g., US if your carrier is US) or current region (if you are roaming internationally)

And iOS needs Call Screening feature similar to Android.
Score: 14 Votes (Like | Disagree)
TheYayAreaLiving ?️ Avatar
60 months ago
Hoping other cell phone carriers follows this.
Score: 10 Votes (Like | Disagree)
JCoe13 Avatar
60 months ago

Hoping other cell phone carriers follows this.
Based on the article, it seems that this will be required by June 2021 for all carriers
Score: 7 Votes (Like | Disagree)
Sasparilla Avatar
60 months ago
On this carrier and got a call about my expiring warranty (for my 10 year old car) yesterday (normally about 1 a day), will be interesting to see if this does a thing. If its only labeling, its close to worthless.

It does make me wonder if we really need phone numbers at this point, at the height of this nonsense (and inability or lack of motivation of the carriers to fix it), a full size ipod touch with connection through a wireless provider (but no phone number) was sounding pretty good.

Ahhh for actual blockage, you have to get their app, it appears, and it (according the app store) harvests your contact info, usage data and user content (whatever that is) along with other stuff not directly linked the user (but probably easily linked later on).

How annoying. That full size ipod touch with a wireless connection but no phone number anyone can call sounds better at every turn.
Score: 6 Votes (Like | Disagree)
Unity451 Avatar
60 months ago

AT&T and Verizon have similar spam caller prevention tools, but both charge for premium access. AT&T charges $3.99 for features that include Caller ID (though it is included free in the highest tier unlimited plans), while Verizon charges $2.99 per month for Caller ID.
AT&T is the worst.
Score: 6 Votes (Like | Disagree)