Unwanted SMS messages, commonly known as spam or "smishing" texts, are a growing nuisance for mobile phone users. These messages often contain deceptive content designed to steal personal information or spread malware. In the United States, such attacks led to financial losses of $470 million in 2024 alone (arxiv.org). Fortunately, there are several strategies you can employ to block these unwanted messages and protect your personal information.
How Can I Block Unwanted SMS Messages on My Mobile Phone?
1. Utilize Built-in Features on Your Device
For iPhone Users:
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Filter Unknown Senders: Navigate to Settings > Messages and enable "Filter Unknown Senders." This feature separates messages from unknown contacts into a separate tab, reducing clutter and potential spam (support.apple.com).
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Report Spam: When you receive a spam message, open it, tap "Report Junk," and then delete it. This action helps Apple identify and block similar messages in the future (support.apple.com).
For Android Users:
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Block Specific Numbers: Open the Messages app, select the conversation with the unwanted sender, tap the three-dot menu, choose "Details," and then select "Block and report spam." This will block the sender and report the message as spam (howtogeek.com).
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Enable Spam Protection: In the Messages app, go to Settings > Spam protection and enable "Enable spam protection." This feature helps identify and filter out potential spam messages.
2. Leverage Carrier Services
Many mobile carriers offer services to block unwanted messages:
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T-Mobile: Provides a "Message Blocking" feature that allows users to block all chargeable incoming and outgoing SMS and MMS messages (t-mobile.com).
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Verizon: Offers the ability to block calls and messages from specific numbers through the My Verizon website or app (verizon.com).
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AT&T: Provides a service called AT&T ActiveArmor, which includes spam and fraud call blocking features.
Contact your carrier to learn about the specific services they offer and how to activate them.
3. Install Third-Party Applications
Third-party apps can provide additional layers of protection against unwanted messages:
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RoboKiller: Recognized as a market-leading solution, RoboKiller uses advanced algorithms and a vast database to identify and block spam messages effectively.
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Hiya: Offers spam detection and blocking features, but may not be as comprehensive as RoboKiller.
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Truecaller: Provides caller ID and spam blocking services, though its effectiveness can vary.
While these apps can be effective, it's essential to review their privacy policies and user reviews to ensure they meet your needs.
4. Report Unwanted Messages
Reporting spam messages helps authorities and carriers take action against spammers:
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Forward to 7726: In the U.S., forward the spam message to 7726 ("SPAM"). This service is free and helps carriers identify and block spam messages (verizon.com).
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Contact Your Carrier: Inform your carrier about persistent spam messages so they can take appropriate action.
5. Be Cautious with Personal Information
Avoid sharing personal or financial information via SMS, especially when unsolicited. Legitimate organizations will not ask for sensitive information through text messages.
6. Regularly Update Your Device and Apps
Ensure your device's operating system and apps are up to date, as updates often include security patches that protect against new threats.
7. Consider Changing Your Number
If spam messages become overwhelming, consider changing your phone number. However, this is a last resort and may not prevent future spam if your new number is shared or leaked.
8. Stay Informed About New Scams
Stay updated on the latest SMS phishing ("smishing") attacks and scams. Being aware of common tactics can help you recognize and avoid potential threats (arxiv.org).
By implementing these strategies, you can significantly reduce the number of unwanted SMS messages you receive and enhance your mobile security.
Highlights:
- New 'SMS blaster' text scams are on the rise, security experts warn - stay safe by changing this one phone setting, Published on Saturday, October 04
