How to Block Unknown Number Calls on Android: 3 Ways

You will often receive calls from the unknown numbers on your phone at least once or twice in a day. It’s very annoying when you pick up the call and found that it is another call from your network provider or some other marketing company for the promotional purpose.

Block unknown calls on Android

If you are getting spam, fraud or prank calls from any particular number, you can block it on your phone. Android has a built-in feature which allows you to block calls. It also has the ability to block all unknown callers which aren’t saved on your phone book.

On the other hand, if you want to stop promotional calls from the company, you can enable DND (stands for Do Not Disturb) service. This guide shows you various methods to block spam and fraud calls from unknown numbers on your Android phone.

How to block unknown number calls on Android

Follow this step-by-step guide to block calls from unknown numbers on your Android phone –

  1. First, open Phone app and find the number you want to block in your call log.
  2. Tap on it and click Details (or More) option.
    Phone call log
  3. In the call details, there will an option to block the number. In some smartphones, this option is available under the menu (tap the three-dots button).
    Block unknown number from call log
  4. Alternatively, open your contacts list in the Phone app and tap the menu button (three-dots at the top right corner of the screen).
    Contacts menu
  5. Now go to Settings > Block Number.
    Add phone number to block
  6. Here you can add phone numbers to block list either from your address book or manually. If you want to block calls from all unknown numbers that aren’t saved in your address book, you can enable “Block unknown callers” button.

For this tutorial, we have shown screenshots from Samsung smartphone, however, these steps are very similar for other Android smartphones also.

Block unknown numbers and spam calls using TrueCaller

You can also use an app named TrueCaller to block calls on your smartphone. This app is mostly used to find out the details of unknown numbers. It also allows you to automatically block spam and telemarketing calls/SMS.

  1. Download and install TrueCaller app on your phone.
  2. Open it and create an account on TrueCaller using your phone number. You will be asked to provide your personal information such as name, and email address.
  3. Once you are logged in, click menu button (three parallel lines) and go to Settings > Block.
    Truecaller my block list
  4. Now click My block list and tap the + button to block a number. You can also block a country code, message sender name, or number series.
    Block numbers using Truecaller
  5. If you want to block spam and telemarketing calls/SMS automatically, enable “Block top spammers” button.
  6. You can also choose how you want to block calls i.e. either by rejecting automatically or ring silently.

How to block company calls and SMS

You network provider will often send you calls and SMS related to your data plan validity, recharge offers and other promotional messages. If you want to stop these annoying calls and SMS from the company, you can enable DND (or Do Not Disturb) service.

There are three ways to enable DND service on your mobile number –

  • Send an SMS on 1909 number with a text message START 0 for the activation of DND service.
  • Alternatively, you can call 1909 number and follow the IVR guidance to enable DND service.
  • Some network providers also have DND feature in their mobile application such as MyJio app. Simply, login to your account and go to Settings > Service Settings > Do Not Disturb service.
    Enable DND service in MyJio app

So these are some of the methods to block spam calls from the company and unknown numbers on your Android phone. If you want to ask something about this tutorial, let us know in the comment section below.

About the author

Vivek Chaudhary Author
Tech writer & founder @Geek Instructor • Vivek Chaudhary is an experienced tech blogger who has been writing about technology for more than ten years. He's written over 1500 articles covering various tech topics. Vivek is passionate about sharing his expertise to help others. Beyond the digital realm, he enjoys traveling and creating videos on YouTube.

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