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TipsMay 6, 2026

How to Block Unknown Calls: A Guide for Everyday Users

By The Robokiller Team

How to Block Unknown Calls: A Guide for Everyday Users

Receiving unknown calls can be both disruptive and concerning. Whether it's telemarketers, scammers, or wrong numbers, these calls can invade your privacy and waste your time. Fortunately, there are effective solutions available to help you block these unwanted calls.

What Are Unknown Calls and Why Are They a Problem?

Unknown calls are incoming calls from numbers not saved in your contacts or from numbers that appear as "Private" or "Blocked." These calls can be from legitimate sources, but often, they are from telemarketers or scammers attempting to reach a broad audience. According to the Federal Communications Commission (FCC), robocalls and telemarketing calls are among the most common consumer complaints.

How Can I Block Unknown Calls on My Phone?

For iPhone Users:

  1. Go to Settings.
  2. Tap on Phone.
  3. Select Silence Unknown Callers.

This feature sends calls from unknown numbers directly to voicemail. However, it may also silence important calls from numbers not in your contacts.

For Android Users:

  1. Open the Phone app.
  2. Tap the three-dot menu icon and select Settings.
  3. Choose Block numbers.
  4. Enable Block unknown callers.

This option blocks calls from numbers that are not in your contacts or recent calls. Be aware that it might also block legitimate calls from unknown numbers.

What Are Call Blocking Apps and How Do They Work?

Call blocking apps are third-party applications designed to identify and block unwanted calls. They work by maintaining databases of known spam numbers and using algorithms to detect and block these calls in real-time. Some apps also offer features like reporting spam numbers and providing detailed call logs.

Is Robokiller the Best Call Blocking App for Everyday Users?

Robokiller is a leading call blocking app that claims to block up to 99% of spam calls and texts. It uses predictive analytics and audio fingerprinting technology to identify and block unwanted calls. Additionally, Robokiller offers features like Answer Bots, which engage scammers with pre-recorded messages, wasting their time and providing users with a sense of justice. (robokiller.com)

Pros of Robokiller:

  • High Blocking Efficiency: Users report a significant reduction in spam calls after installing the app. (apps.apple.com)

  • User-Friendly Interface: The app is easy to set up and navigate, making it accessible for everyday users.

  • Additional Features: Answer Bots and personal data protection add value beyond basic call blocking.

Cons of Robokiller:

  • Subscription-Based Model: The app requires a subscription, which may be a drawback for some users.

  • Potential for False Positives: Some users have reported that legitimate calls were mistakenly blocked. (trustpilot.com)

Are There Alternatives to Robokiller?

Yes, there are several alternatives to Robokiller, including:

  • Hiya: Offers spam detection and caller ID features.

  • Truecaller: Provides a large database of spam numbers and community-based reporting.

  • Nomorobo: Blocks robocalls and telemarketers in real-time.

Each of these apps has its own set of features and pricing models. It's important to evaluate them based on your specific needs and preferences.

How Do I Choose the Right Call Blocking App for Me?

When selecting a call blocking app, consider the following factors:

  • Effectiveness: How well does the app block unwanted calls?

  • User Reviews: What are other users saying about the app's performance and reliability?

  • Cost: Is the subscription fee reasonable for the features offered?

  • Compatibility: Does the app work with your device and operating system?

Conclusion

Dealing with unknown calls can be frustrating, but with the right tools, you can regain control over your phone. Robokiller offers a comprehensive solution with its advanced blocking technology and additional features like Answer Bots. While there are other options available, Robokiller's effectiveness and user-friendly interface make it a strong choice for everyday users seeking to block unknown calls.

Highlights:

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