Easily identify and block calls from likely scammers with Scam ID and Scam Block.



Improvements to protecting you

  • Network level protection has been added to stop the increasingly common “Neighborhood Spoofing” and prevent hijacked numbers (where scammers temporarily match the area code and 3-digit prefix of the person they are targeting) from reaching your phone.
  • Help us improve these services by reporting an improperly identified call.


Turn on/off Scam ID & Scam Block

Scam ID and Scam Block are free of charge with your T-Mobile postpaid plan. You can turn them on or off at any time.

  • Scam ID displays "Scam Likely" on your screen when calls come in from likely scammers on both smartphones and feature phones.
  • Scam Block allows you to block Scam Likely calls.


Click the button below to update Scam ID and/or Scam Block preferences.


Anonymous callers

The FCC mandates that mobile carriers allow callers the ability to block their caller ID information and place anonymous calls. T-Mobile is obligated to honor the privacy of the caller in these circumstances. T-Mobile can't block anonymous calls or override the privacy choice of the caller, but you may choose not to accept them. To make an anonymous call yourself, dial *67 before dialing the number you are calling.

For more information about privacy and security, please see our Privacy Center.


Caller Verified enhancement (STIR/SHAKEN)

  • New FCC standards of STIR (Secure Telephony Identity Revisited) and SHAKEN (Secure Handling of Asserted information using toKENs) have been adapted to help fight scam callers industry-wide. T-Mobile’s implementation of these standards is known as “Caller Verified.”
  • As of January 7, 2019 T-Mobile was first to market for calls between customers on our network with Caller Verified Enhancement, a new technology aimed at reducing spoofed calls to customers.
    • If you have a Caller Verified enabled device, you will see "Caller Verified" on the dialer when you receive a call that has been verified as authentic, not spoofed.
    • Caller Verified has expanded to include interoperable partners.
      Interoperable partner Launch date
      AT&T August 14, 2019
      Comcast Xfinity Voice home phone service April 16, 2019
      T-Mobile to T-Mobile January 7, 2019
  • Spoofed calls occur when a scammer temporarily hijacks a number to match the area code and prefix of the person's phone number being targeted. SHAKEN/STIR technology lets consumers know that an incoming call is really coming from the number listed on the caller ID display – not a spoofed robocall or scammer.
    • LG G7 ThinQ
    • LG G8 ThinQ
    • LG V40 ThinQ
    • Samsung Galaxy Note8
    • Samsung Galaxy Note9
    • Samsung Galaxy S8
    • Samsung Galaxy S8+
    • Samsung Galaxy S9
    • Samsung Galaxy S9+
    • Samsung Galaxy S10e
    • Samsung Galaxy S10
    • Samsung Galaxy S10+
  • Calls marked as verified have an on-screen display when a call has been verified. Non-verified calls or calls from customers of other mobile carriers continue to come in as not verified.
  • T-Mobile is working with our phone manufacturers to provide customers with as much protection as possible, free of charge.


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