Caller ID spoofing and text messaging spam FAQs

    Find answers to commonly asked questions about caller ID spoofing and text messaging (SMS) spam.



    What is caller ID spoofing?

    Caller ID spoofing is the process of purposely changing the caller ID to any number other than the calling number. It causes the telephone network to display a number on the recipient's caller ID which is not the actual originating phone number, and this can make an incoming call appear to be from a legitimate caller when it's not.



    What can I do about caller ID spoofing?

    Here are a few resources to help you report unwanted calls and caller ID spoofing:




    What is text messaging spam?

    Text message spam is any unwanted or unsolicited text message sent indiscriminately to your mobile phone, often for commercial purposes. It can take the form of a simple message, a link to a number to call or text, a link to a website for more information, or a link to a website to download an application. T-Mobile is committed to fighting mobile spam and encourages our customers to report unsolicited messages to us for investigation. If you ever get a text message that you suspect is spam and you report it, you're helping us identify spammers and the messages they send.



    What happens to the spam reports?

    We automatically forward the message and details of the attacker to the Spam Reporting Service (SRS) system for analysis. The SRS is a global system, run by a vendor on our behalf, that helps protect mobile phone subscribers from spam, fraud, and malware. The SRS system is linked to a global database that tracks potential spam messages and helps identify bad senders. The information reported to the SRS may be shared with government agencies that work to combat spam and prevent fraudulent, deceptive, and unfair practices.



    How do I report text message spam?

    If you receive text message spam, follow these steps:


    1. Forward the message to 7726 (which spells “SPAM” on most phone keypads).
    2. You’ll receive an automated message asking you to reply back to us with the 10-digit phone number of the original sender.
    3. Once you submit the sender's phone number, we'll reply with a text message confirming we've received it.


    You might receive an error message when forwarding some group text messages or multimedia messages (MMS). If this happens, call T-Mobile Customer Care at 1-877-746-0909.


    We use this information to help identify who is sending spam and take appropriate action. There's no charge to report mobile spam. Messages forwarded to 7726 do not count toward your plan. You can also place your number on the Federal Trade Commission’s Do Not Call list at If you continue to receive spam messages or calls, you may file a complaint with the FTC at the same website.



    Am I at risk of sharing my personal information if I report spam?

    No. The message and your details are encrypted. Your identity will not be shown or shared.



    Can I block text messages to my phone?

    Partially. You can block text messages using Message Blocking. However, some messages cannot be blocked such as account change notifications, usage alerts, and others.



    How do I stop unsolicited text messages on my phone?

    • You can guard your private information by not using your T-Mobile number when you sign up for non-T-Mobile contests, sweepstakes, promotions, or newsletters.
    • If you feel like you're receiving too many messages from a subscription service, you can opt out or adjust your notification settings by visiting the promotion or newsletter's website.
    • If the above tips don't work for you, as a last resort you can change your phone number as a way to prevent text messages coming from another mobile phone.



    How do I avoid becoming a victim of text message spam?

    Here are tips to protect yourself:


    • Never click on a link in a text message unless you're certain that the message is from a trusted source that you initiated.
    • Don’t act on any message if you're suspicious of the content, even if it looks like it's from someone you know.
    • Never download applications from unauthorized app stores. We recommend Lookout Mobile Security Premium to help keep your device protected and up to date.
    • Do not swap applications with friends using memory cards.



    What do I do if I opened a suspicious link or app?

    Simply reading a text message won't affect or compromise personal information stored on your device. However, if you do open a link or app from a suspicious source, you'll want to take certain steps to make sure your information is safe:



    Learn more:



    Related pages


    Message Blocking

    Spam troubleshooting

    Text messaging (SMS)