How to Automatically Block Unknown Numbers on Android

Unwanted calls from unknown numbers, spam bots, and telemarketers can interrupt your day and threaten your privacy. Fortunately, Android offers built-in features that help block these numbers automatically—without having to reject them manually each time.

Why Enable This Feature?

Turning on automatic blocking for unknown or unsaved numbers offers several benefits:

• Peace of mind: Stop distractions from random or suspicious callers.
• Security: Protect yourself from scams, fraud, and robocalls.
• Productivity: Focus on what matters without getting interrupted.

Method 1: Using Google Phone App

If your device uses the Google Phone app (common on Pixel, Nokia, OnePlus, etc.):

• Open the Phone app.
• Tap the three-dot menu (top right) and select Settings.
• Tap Blocked numbers.
• Toggle on “Block calls from unidentified callers”.

This will automatically silence calls from people not saved in your contacts or those who hide their caller ID.

Method 2: On Samsung Phones

Samsung devices offer enhanced options:

• Open the Phone app.
• Tap More (three dots) > Settings.
• Select Block numbers.
• Enable “Block unknown/private numbers”.
• You may also enable “Block calls from unsaved numbers” (on supported versions).

This ensures that only known and trusted contacts can call you.

Method 3: Use Do Not Disturb with Contacts-Only Exceptions

If your Android version doesn’t support the options above directly, you can use the “Do Not Disturb” mode creatively:

• Go to Settings > Notifications > Do Not Disturb.
• Select Calls or People > Allow calls from.
• Choose Contacts only.
• Activate Do Not Disturb mode.

This silences all unknown numbers while allowing trusted contacts to reach you.

Additional Tips

• Update your Phone app from the Play Store for the latest features.
• Keep your contacts organized to ensure you don’t miss important calls.
• Use voicemail to let unknown callers leave a message if necessary.

Bonus: Use Third-Party Apps

Apps like Truecaller, Hiya, and Call Control offer powerful call filtering features that can automatically detect and block spam or even entire categories of numbers (like international or hidden callers).

Final Thoughts

Taking control of your incoming calls helps you stay focused, safe, and productive. Whether you use built-in settings or third-party apps, Android makes it easy to block the noise and only let the important calls through.