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One of the downsides of having a phone in your pocket all the time is unwanted calls. Sure, you could simply not answer the call, but that’s still annoying. You can avoid this by blocking unknown numbers on Android.

What Is an “Unknown” Number?

We’re going to be showing you how to block calls from “unknown” numbers, but what does that actually mean? In short, it blocks any call from a private or unknown number.

This does not mean it will block calls from numbers not included in your contacts, as it does on iPhone. Private and unknown calls literally appear on caller ID without a phone number.

Blocking these calls will not block calls from regular phone numbers, even if they aren’t in your contacts.

RELATED: How to Add a Contact to the Home Screen on Android

How to Block Unknown Callers From Google Phone

First, we’ll show you how to block unknown callers from the “Phone by Google” app. You can download the app from the Play Store and set it as the default dialer. It will ask to be set as default when you install it, but if you miss that you can do so from Settings > Apps >Default Apps > Phone  App.

Now go to the Phone by Google and tap the three-dot menu icon in the top-right corner.

Tap the menu button.

Select “Settings” from the menu.

select settings

Select “Blocked Numbers.”

Tap "Blocked Numbers."

Toggle the switch on for “Unknown.”

Toggle the "Unknown" switch on.

That’s it! You will no longer receive calls from unidentified callers.

How to Block Unknown Callers on a Samsung Phone

If you have a Samsung Galaxy phone and don’t want to use the Google Phone app, we’ll show you how it works with Samsung’s stock dialer.

Open the “Phone” app and—from the “Keypad” tab—tap the three-dot menu icon in the top-right.

Select “Settings” from the menu.

Select "Settings" from the menu.

Go to “Block Numbers.”

Open "Blocked Numbers."

Toggle the switch on for “Block Unknown/Private Numbers.”

Toggle on "Block Unknown/Private Numbers."

You’re all set! Calls from unidentified numbers will no longer ring your phone. Hopefully, this will reduce the number of calls you have to ignore. Android has some other tools you can use to limit spam calls as well.

RELATED: How to Avoid Spam Robocalls with "Verified Calls" on Android

Profile Photo for Joe Fedewa Joe Fedewa
Joe Fedewa is a Staff Writer at How-To Geek. He has been covering consumer technology for over a decade and previously worked as Managing Editor at XDA-Developers. Joe loves all things technology and is also an avid DIYer at heart. He has written thousands of articles, hundreds of tutorials, and dozens of reviews.
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