How to Block Calls from Strangers on Android (Ban Numbers That Are Not in Contacts)

Here is the guide on how to block all incoming phone calls from numbers that are not in your contacts on Android phone: pure Android, Huawei, Xiaomi.

It’s quite simple to block a single caller on Android but what to do if you are attacked by a squall of calls from different strange phone numbers? Of course, you may ban them one by one but you will continue to receive unwanted calls from yet a new number each time.

In this case the white-list technology will help you out. You need to block all stranger (callers whose numbers are not added to your contacts) but let all your contacts easily reach you.

In this article we will explain how to block strangers using the built-in phone apps and do the same using third-party call managers.

In such a way you will be able to block phone calls from spammers, scammers, annoying telemarketers by activating a single option on your phone. The steps are different depending on your phone model.

block calls from strangers

[Contents] How to Block Incoming Calls from Strangers – Phone Numbers That Are Not in Contacts:

Pure Android

  • Launch the Phone app: phone app Android 10
  • Tap the three-dot menu icon at the top right corner to access the Settings of the Phone app: phone app settings Android 10
  • Now select Blocked numbers: Blocked numbers Google phone app
  • And here tell the Google phone app to block strangers by activating the Numbers not in contacts option: Block Numbers not in ContactsUpdate 2020: Unfortunately, Google removed this option for some reason.


  • Open the Phone app: Dialer Contacts app Huawei
  • Tap the three-dot icon and select Blocked: blocked numbers Huawei Dialer
  • Tap on Block rules at the very bottom of the screen: block rules Huawei dialer
  • Tap on Call block rules: call block rules EMUI 8.2
  • And here you can finally activate the Block all strangers option: Block all strangers all non-contacts numbers Huawei


  • Open the Phone app: Phone app Xiaomi
  • Tap on the hamburger (menu) icon on the bottom left: Xiaomi dialer options & settings
  • Now make sure you have the Blocklist enabled (toggle it on if not).
  • Then head to Call blocklistCall blocklist Xiaomi
  • And here toggle on the option called Block calls from strangers: Block calls from strangers Xiaomi


  • Open the Phone app: Meizu Phone app
  • Tap on the three-dot icon on the upper right corner of your screen and select Settings: Meizu phone dialer settings
  • Select Blocklist: Meizu blocklist
  • Tap the gear icon on the upper right: Meizu blocklist settings
  • Select Call filtering: Meizu call filtering
  • And finally toggle on the Block calls from strangers option: Meizu Block calls from strangers

Third-party Apps (Samsung Galaxy)

As you might know, Samsung Galaxy devices don’t have the ability to block numbers of strangers in their built-in native dialer. For such unique phones and tablets the only option is to use a third-party call managing app. We can suggest the Call Blocker by Vlad Lee that can be easily found in the Google Play Store.

All you need to do is:

  • Install the app.
  • Launch it.
  • Give it all required permissions.
  • Go to the Blocking tab.
  • Make sure the Blocking itself is toggled on.
  • Activate the Unknown numbers (Block all numbers except contacts) option: Call Blocker Vlad Lee block all except contactsOnce you’ve configured the app, all calls from strange numbers will be rejected.

Wrapping Up

Hopefully, now you know how to get rid of annoying scammers, spammers, telemarketers and other unwanted strangers on your Android phone. If you have something to add, feel free to tell us in the comments. Good luck!


  1. Doesn’t work on Android 10. There is literally no way to block calls not in contacts which is a huge downgrade for Google. Gonna have to ditch this Pixel 3 for an iPhone.

    1. Really bad news. First, I decided that you were wrong. But I took my Pixel in hands, open the Phone app and… you were right, they removed the option “Numbers not in Contacts” and other options except “Unknown” that (hopefully) is designed to block restricted numbers. That is disappointing.
      P.S. I use iPhone with its DND mode, that is really capable to REJECT all callers except contacts or favorites instead of silencing.

  2. Android 9 needs this blocking option. It only silences the calls from India and pakistani scammers and scumbag telemarketers. (Yes, if you are a telemarketer you ARE a scumbag, through and through.. Shame on you!) And DO NOT bother with the call blacker app from Vlad Lee. I looked it up.. “CONTAINS ADS!” “F” that! Why block one group of scumbags trying to get your money, only to be endlessly bombarded by another group of scumbags trying to get your money?
    Better yet, get on whatever official android site, FB page, Feedback, Support, whatever, and DEMAND a native call and text BLOCKER, not just a call silencer.

  3. This article NEEDS to be updated!
    I have an android phone, JUST checked, there is NO “Numbers not in contacts option” at ALL to enable.
    Is there ANY way to have this enabled so NO calls OR texts get threw that is NOT on your contacts lists?
    Preferred via Android stock settings, but if there is aa 3rd party app is needed that is reliable/safe, I’ll install it!

    1. If talk about the stock Android, some users may still have such feature if they stopped updating the Phone app on their Pixels (or maybe some other smartphones). But yes, Google removed this extremely useful feature for some reason in Android 10 release. I remember I used it happily during Android 10 beta in 2019. 🙁
      Maybe, it is possible to download a certain Phone app version with this feature.

  4. To block numbers not in address book on android phones has moved to main settings
    Settings/sound/Do not disturb.
    Should be self explanatory from there.

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