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TipsMay 6, 2026

How to Block Unknown Sender Texts: A Guide for Everyday Users

By The Robokiller Team

How to Block Unknown Sender Texts: A Guide for Everyday Users

Receiving unsolicited text messages from unknown senders can be both annoying and potentially harmful. These messages often contain spam, phishing attempts, or malware links. Fortunately, there are several strategies you can employ to block these unwanted texts and safeguard your privacy.

Why Am I Receiving Texts from Unknown Senders?

Unsolicited texts from unknown numbers are typically sent by marketers, scammers, or automated systems. They may promote products, attempt to steal personal information, or distribute malicious software. Understanding the source can help in choosing the most effective blocking method.

How Can I Block Unknown Sender Texts on My Phone?

For iPhone Users:

  1. Enable Filter Unknown Senders:
  • Go to Settings > Messages.
  • Toggle on Filter Unknown Senders.
  • This will separate messages from unknown senders into a separate tab, reducing interruptions.
  1. Use Do Not Disturb Mode:
  • Go to Settings > Do Not Disturb.
  • Customize the settings to allow calls and messages only from your contacts.

For Android Users:

  1. Block Unknown Numbers:
  • Open the Messages app.
  • Tap the three dots in the top-right corner and select Settings.
  • Choose Spam Protection and enable Enable Spam Protection.
  • This feature will automatically detect and block suspected spam messages.
  1. Use Do Not Disturb Mode:
  • Go to Settings > Notifications > Do Not Disturb.
  • Customize the settings to allow messages only from your contacts.

Are There Third-Party Apps That Can Help Block Unwanted Texts?

Yes, several third-party applications offer enhanced protection against spam texts. One such app is Robokiller, which provides comprehensive spam blocking features.

Robokiller Features:

  • Spam Text Blocking: Robokiller blocks 99% of spam text messages, ensuring you only receive desired communications. (play.google.com)

  • Caller Identification and Blocking: It identifies and blocks spam calls using a global database of over 1.5 billion phone numbers. (robokiller.com)

  • Customizable Block and Allow Lists: Users can create personalized lists to block or allow specific contacts, preventing important messages from being blocked. (robokiller.com)

  • Answer Bots: Robokiller uses recorded messages to waste scammers' time, providing a unique form of 'robocall revenge.' (apps.apple.com)

Comparison with Competitors:

When compared to other spam blocking apps like Hiya and Truecaller, Robokiller offers superior features:

  • Audio Fingerprinting Technology: Robokiller uses machine learning to detect scammers based on their unique audio fingerprints, effectively blocking calls even if scammers change numbers. (robokiller.com)

  • Comprehensive Spam Protection: Unlike some competitors, Robokiller provides both call and text spam blocking, offering a more holistic solution. (robokiller.com)

How Do I Install Robokiller to Block Unknown Sender Texts?

  1. Download the App:
  • For iOS: Visit the App Store and search for Robokiller.
  • For Android: Visit the Google Play Store and search for Robokiller.
  1. Install and Set Up:
  • Follow the on-screen instructions to install the app.
  • Grant necessary permissions for the app to function correctly.
  1. Configure Settings:
  • Customize your block and allow lists as needed.
  • Enable features like Answer Bots for added protection.

Are There Any Costs Associated with Using Robokiller?

Robokiller offers a subscription-based model with a 7-day free trial. After the trial period, users can choose between monthly or annual subscription plans. Pricing details are available on the Robokiller website.

What Are Users Saying About Robokiller?

User reviews highlight Robokiller's effectiveness in blocking spam calls and texts. Many appreciate the customizable features and the unique Answer Bots that waste scammers' time. However, some users have reported issues with customer support and pricing changes. (trustpilot.com)

Conclusion

Dealing with unsolicited texts from unknown senders can be challenging. By utilizing built-in phone features and third-party apps like Robokiller, you can significantly reduce or eliminate these unwanted messages. Robokiller's advanced technology and comprehensive features make it a strong choice for users seeking robust spam protection.

Highlights:

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