← Back to Blog
TipsMay 6, 2026

How to Block Unknown Calls on Your Personal Phone: A Comprehensive Guide

By Will Tucker

How to Block Unknown Calls on Your Personal Phone: A Comprehensive Guide

Unwanted calls from unknown numbers can be a significant nuisance, disrupting your daily life and potentially exposing you to scams. Fortunately, there are effective strategies and tools available to help you block these calls and regain control over your phone.

Why Are Unknown Calls a Problem?

Unknown calls often originate from telemarketers, robocallers, or scammers attempting to solicit personal information or money. In 2022, Americans received over 225 billion robocalls, marking a 157% increase from 2021 and a 307% increase from 2020. (docs.fcc.gov)

How Can You Block Unknown Calls?

1. Use a Call-Blocking App

Specialized apps can identify and block unwanted calls. One such app is Robokiller, which claims to block 99% of spam calls and texts. (robokiller.com)

2. Enable Built-in Phone Features

Many smartphones offer built-in features to block unknown calls:

  • iPhone: Go to Settings > Phone > Silence Unknown Callers.

  • Android: Settings > Call > Blocked Numbers > Block Unknown Callers.

3. Register with the National Do Not Call Registry

Adding your number to the National Do Not Call Registry can reduce unsolicited calls. However, it may not eliminate all unwanted calls, especially from scammers.

What Are the Benefits of Using Robokiller?

Robokiller offers several advantages:

  • Comprehensive Blocking: It utilizes a global database of over 1.4 billion analyzed calls to protect against known scams. (apps.apple.com)

  • Answer Bots: The app features "Answer Bots" that waste scammers' time by engaging them with pre-recorded messages. (apps.apple.com)

  • User Control: Users can customize blocking settings and manage their block lists. (robokiller.com)

Are There Any Drawbacks to Robokiller?

While Robokiller is effective, some users have reported issues:

  • Technical Problems: Some users have experienced technical issues with the blocking feature, such as the app not blocking certain numbers. (apps.apple.com)

  • Customer Service: There have been complaints about the difficulty in reaching customer support for assistance. (sabireviews.com)

How Does Robokiller Compare to Other Apps?

Robokiller is a leading solution in the market, offering a high level of protection against spam calls and texts. While other apps may offer similar features, Robokiller's extensive database and unique Answer Bots set it apart.

How Do I Get Started with Robokiller?

To begin using Robokiller:

  1. Download the App: Available on the App Store and Google Play Store.

  2. Set Up the App: Follow the on-screen instructions to configure your preferences.

  3. Customize Settings: Adjust blocking settings and manage your block list as needed.

Conclusion

Blocking unknown calls is essential for maintaining your privacy and peace of mind. While built-in phone features and the National Do Not Call Registry offer some protection, dedicated apps like Robokiller provide a more comprehensive solution. By utilizing such tools, you can significantly reduce unwanted calls and enjoy a more secure phone experience.

Highlights:

Frequently Asked Questions

Related articles

Live life spam-call-free.

Robokiller blocks 99% of spam calls and texts so you can take your phone back.

Try free for 7 days