Block scam calls and robocalls with the free Scam Shield™app.

Scam Shield is your ultimate control center with T-Mobile’s advanced anti-scam features like Scam Likely, Scam Block, and Caller ID.

How to block scam calls

The mobile app makes it easy to stop scam/spam calls fast with its five features of protection:

Advanced network technology.

Our supercharged network analyzes every call using A.I., machine learning, and patented technologies. And our defenses update every six minutes to stay ahead of scammers.

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Built-in Scam Block protection.

With built-in protection technologies, you can keep scammers away with Scam ID, Scam Block, and Scam Counter that identify and help stop them—before you ever get the call.

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Know who’s calling with free Caller ID.

With full Caller ID access, you can reduce unidentified calls by displaying a caller's information, even if they’re not in your contact list. You can also see if a call is in a spam category such as telemarketing. All you need to do is enable it in the app.

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Keep your personal number personal.

Scam Shield gives you an extra PROXY number that you can use when you don’t want to share your private phone number. Need to change your number? You can for free—for any reason—up to one time per year.

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Report scam calls.

Help protect everyone from scam calls, spam calls, and robocalls with Scam Reporting. Identify suspicious callers or fraudsters and help prevent their calls from being received by you—or others—in the future.

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Take total control

Block Spam Calls. Upgrade to Scam Shield Premium.

Premium features help you optimize and organize your mobile life with control over your calls and voicemails.

Get even more of what you love from T-Mobile.

Check out customer benefits.

Discover our better network with advanced scam-blocking protection built in.

Got questions?

What is Scam Likely?

When our network filters detect a potential scam call, we flag it and display it as Scam Likely on your device. This is made possible by our Scam ID technology which is embedded in our network and is enabled by default for all T-Mobile customers. No action is required on the part of customers to enable it, and it’s free.

How do I block a scam call on T-Mobile?

There are a few ways to turn on Scam Block:

  • Download the free Scam Shield app and toggle on Scam Block
  • Dial #662# from your T-Mobile device
  • Log in to My T-Mobile or the T-Mobile app, where you'll see an option to turn on Scam Block
  • Turn Scam Block on for your DIGITS numbers by dialing 611 from your T-Mobile device to speak to a mobile expert
  • T-Mobile pre-paid customers can turn on Scam Block by dialing #662#, visiting a retail store, or dialing 611 to speak to Care

Qual’g service & capable device req’d. Turning on Scam Block might block calls you want; disable any time.

What about scam/spam texts? Does T-Mobile block those?

We've had an anti-spam solution for mobile messaging including SMS, MMS, and RCS since 2014, and we include it at no additional charge for T-Mobile customers. Here’s how it works:

  • Our anti-spam message solution is updated regularly with spam message fingerprints and signatures. Whenever a mobile message is received on the network, it's checked against the anti-spam solution. If a message is determined to be spam or unwanted, we'll block it. Otherwise, the message will be delivered.
  • Customers can report spam or unwanted messages by simply forwarding the messages to 7726. We'll reply with a confirmation text and forward the message to the Security Center for analysis. The message and your details are encrypted, so your identity won't be shared.
  • Replying "STOP" is usually a convenient way to quickly opt out of a message program. However, for unwanted spam texts, we recommend forwarding messages to 7726 and not replying. Similar to picking up an unknown robocall, spammers will use any texted reply (including "STOP") as confirmation that they've reached a real person.

What is Caller ID?

Caller ID is the name of the caller as displayed on incoming calls made by the caller, and it’s a free feature for all T-Mobile customers with a capable device.

How do I get free Caller ID?

T-Mobile customers can download the new Scam Shield app to get started. Eligible T-Mobile customers can also opt in by dialing #436#, via logging in to My T-Mobile, by visiting a T-Mobile retail store, or by dialing 611 from their T-Mobile phone to speak to a mobile expert.

How do I change the name that appears as my outbound Caller ID?

To edit the way your own Caller ID displays when you make calls, log in to My T-Mobile or the T-Mobile app and select >Profile>Line Settings>Caller ID, and enter your legal name or a commonly accepted variation. Profanity is not allowed. Changes will display within 72 hours.
If your name change isn't working, please dial 611 from your phone and we'll connect you to your Team of Experts.

How can I make sure my business calls are not blocked?

The free website lets businesses register their business number(s) and name, so their calls to customers are recognized as legitimate.

What is PROXY by DIGITS?

PROXY gives you a free second number to help keep your primary number private, and is available to add to postpaid voice lines. One free PROXY number is available per account. You can check your calls and listen to your messages in the DIGITS app.

Who is eligible to add a PROXY by DIGITS number?

This offer is available for all postpaid voice plans; one free PROXY number is available per account. T-Mobile prepaid and Magenta for Business accounts with 13+ lines are not currently eligible.

How do I get FREE PROXY by DIGITS number?

Eligible customers can visit a T-Mobile store or dial 611 from your T-Mobile device to speak to a mobile expert, who will add the PROXY by DIGITS service to your account and set it up. For setup instructions, visit our support page.

What is LineLink® and does it get scam protection?

T-Mobile LineLink is a home phone service that uses the T-Mobile network and Voice over IP (VoIP) technology. Because T-Mobile LineLink uses the T-Mobile network, customers will get fewer scam calls with Scam ID and Scam Block, plus Caller ID.

What is Number Verified?

Number Verified is T-Mobile's implementation of the new STIR/SHAKEN industry standards. T-Mobile was the first to implement STIR/SHAKEN for customers in January 2019. T-Mobile customers with an eligible device will see "Number Verified" on their screen when the calling number has been verified as authentic by the network. This means you can be assured that the phone number calling you is legitimate and hasn't been spoofed.

I use the Scam Shield app and have Scam Block turned ON. Why do I still receive spam and scam calls?

We do our best to block spam and scam calls. Our network defenses update every 6 minutes. However, scammers sometimes still find a way around these network protections. While we continue to improve our network filters to block a higher percentage of all spam and scam calls, we encourage all our customers to report any spam or scam calls that we are unable to block. You can also report calls that you deem safe that might have been incorrectly blocked. There are two ways you can report calls:
From the app (Basic):
1. In the Scam Shield app, tap the Activity tab. A call log appears.
2. Select the number that needs to be reported, then tap Report
3. Choose the best category that represents the type of call, then tap Send Report > Done
From the app (Premium):
1. In the Scam Shield app, tap the Activity tab. Select the menu icon (three dots).
2. Tap Report and select the number that needs to be reported.
3. Choose the best category that represents the type of call, then tap Send Report > Done
From a web browser:
1. In a web browser, visit
2. Fill out the form, then choose Review. Corrections are made within 48 hours of a verified request.

What is Scam Shield Premium?

Scam Shield Premium delivers advanced call controls beyond the free services included with Scam Shield to help combat unwanted robocalls and manage nuisance calls. Features include:

  • Sending entire categories of calls directly to voicemail, including telemarketers, political solicitations, and fundraising calls
  • Reverse Number Lookup for unknown callers, and the option to create Always Block lists that live on the network—not just your contact list—so your preferences will stay, even if you delete the app or get a new device
  • Voicemail-to-text, which sends you a transcription of a voicemail via an SMS message, email, or in the Visual Voicemail app
  • Scam Shield Premium features are included in Magenta MAX plans. Other plans can add Scam Shield Premium features for $4/line per month.