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

streaming black friday 2025

Black Friday Streaming Deals Include Big Savings on Disney+, Hulu, Apple TV, and More

Monday November 24, 2025 8:03 am PST by
We've been focusing on deals on physical products over the past few weeks, but Black Friday is also a great time of year to purchase a streaming membership. Some of the biggest services have great discounts for new and select returning members this week, including Disney+, Hulu, Paramount+, Peacock, and more. Note: MacRumors is an affiliate partner with some of these vendors. When you click a...
iOS 26 on Three iPhones

iOS 27 Will Reportedly Have Two Key Upgrades

Sunday November 23, 2025 8:48 am PST by
iOS 27 will reportedly have two major elements: quality improvements and new AI features. In his Power On newsletter today, Bloomberg's Mark Gurman said that iOS 27 will be similar to Mac OS X Snow Leopard, in the sense that Apple is focused on improving "quality and underlying performance" over adding new features. Gurman said there is one exception to this rule, though, as he expects...
iOS 26

iOS 26.2 Adds These New Features to Your iPhone

Thursday November 20, 2025 10:50 am PST by
iOS 26.2 is currently in beta testing. The upcoming update includes a handful of new features and changes on the iPhone, including a new Liquid Glass slider for the Lock Screen's clock, offline lyrics for Apple Music, and more. In a recent press release, Apple confirmed that iOS 26.2 will be released to all users in December, but it did not provide a specific release date. Keep reading...
General Black Friday Deals 25 Red

Apple Black Friday Deals Available Now on AirPods, iPads, Accessories, and More

Friday November 21, 2025 8:48 am PST by
We're only a few days away from 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...
maxresdefault

The MacRumors Show: iPhone 18 Pro Looks Like a Huge Upgrade

Friday November 21, 2025 9:10 am PST by
On this week's episode of The MacRumors Show, we talk through all of the new features and improvements expected to come to next year's iPhone 18 Pro and iPhone 18 Pro Max models. Subscribe to The MacRumors Show YouTube channel for more videos Apple's next-generation iPhones are less than ten months away and we already have a good idea about what to expect based on corroborated leaks, rumors,...
apple news banner

Apple News Loses CNN

Monday November 24, 2025 7:56 am PST by
American multinational news company CNN has abruptly pulled its content from Apple News, Semafor reports. CNN quietly removed its stories from Apple News over the weekend and there is no longer a feed from the network to subscribe to in the app. This effectively ends its distribution agreement with Apple while the two sides negotiate new terms. Discussions are apparently ongoing and CNN's...
amazon black friday

Amazon Kicks Off Black Friday Sale With Major Discounts on Apple Accessories, TVs, and More

Sunday November 23, 2025 7:12 am PST by
Black Friday deals have begun, and Amazon is one of the best places you can find steep discounts on numerous products this week. We've already collected all of the best Apple-related deals you'll find at Amazon (and other retailers) in our Apple Black Friday Deals post, so below you'll find other discounts on devices like Anker accessories, Beats headphones, video games, TVs, and more. Note:...
Apple Shopping Event 2025

Apple Announces 2025 Black Friday Event, Here's What You Can Get

Thursday November 20, 2025 6:28 am PST by
Apple's annual four-day Black Friday through Cyber Monday shopping event is returning on Friday, November 28 through Monday, December 1 in many countries, including the United States, Canada, Australia, New Zealand, France, Germany, Italy, Spain, the United Kingdom, Belgium, the Netherlands, Sweden, Thailand, and others. During the shopping event, customers can get an Apple gift card with...
Apple Foldable Thumb

Foldable iPhone to Debut These Three Breakthrough Features

Tuesday November 25, 2025 7:09 am PST by
Apple's first foldable iPhone is expected to launch alongside the iPhone 18 Pro models in fall 2026, and it's shaping up to include three standout features that could set it apart from the competition. The book-style foldable will reportedly feature an industry-first 24-megapixel under-display camera built into the inner display, according to a recent JP Morgan equity research report. That...

Top Rated Comments

yaxomoxay Avatar
61 months ago
But what if my car warranty is expiring for real?!?!?
Score: 54 Votes (Like | Disagree)
nutmac Avatar
61 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
61 months ago
Hoping other cell phone carriers follows this.
Score: 10 Votes (Like | Disagree)
JCoe13 Avatar
61 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
61 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
61 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)