{"id":5998,"date":"2026-10-17T15:32:25","date_gmt":"2026-10-17T10:02:25","guid":{"rendered":"https:\/\/callerdesk.io\/blog\/?p=5998"},"modified":"2026-10-17T15:32:28","modified_gmt":"2026-10-17T10:02:28","slug":"blacklist-number-block-number-on-android-iphone","status":"publish","type":"post","link":"https:\/\/callerdesk.io\/blog\/blacklist-number-block-number-on-android-iphone\/","title":{"rendered":"Blacklist Number: How to Block a Number on Android and iPhone"},"content":{"rendered":"\n

Unwanted calls can interrupt your work, family time or sleep. If one number keeps calling, you can add it to your phone\u2019s block list. This is often called blacklisting a number<\/strong>.<\/p>\n\n\n\n

The block list is useful when you want to stop calls from a specific number. It works differently from spam filtering and DND preferences, though. This guide explains what happens when you block a number, how to block or unblock it on Android, Samsung Galaxy and iPhone, and what you can do about promotional or suspected fraud calls in India.<\/p>\n\n\n\n

What Does It Mean to Blacklist a Number?<\/strong><\/h2>\n\n\n\n

To blacklist a number<\/strong> means to add it to your phone\u2019s blocked list. Your phone then handles calls from that number according to its settings. The call may be declined or silenced, but the exact behaviour can vary by device and network.<\/p>\n\n\n\n

Blocking a number may not block every way that person can contact you. For example, blocking them in your Phone app may not stop messages on WhatsApp. You may need to block them separately in each app.<\/p>\n\n\n\n

Also, if a caller starts using a different number, blocking the original number won\u2019t affect the new one.<\/p>\n\n\n\n

Blocking, Spam Filtering and DND: How Are They Different?<\/strong><\/h2>\n\n\n\n

These features can all help you manage unwanted calls, but each works differently. Use blocking for a specific caller, spam filtering for calls flagged as suspicious, and DND when you want to silence calls or notifications.<\/p>\n\n\n\n

Option<\/strong><\/td>What it does<\/strong><\/td>Best used for<\/strong><\/td>What it may not do<\/strong><\/td><\/tr>
Block a number<\/strong><\/td>Adds a selected number to your phone\u2019s block list.<\/td>Stopping repeated calls from one number.<\/td>It may not block calls from the same person using another number or app.<\/td><\/tr>
Spam filtering<\/strong><\/td>Flags, silences or filters calls that your phone or service provider identifies as possible spam.<\/td>Managing calls from numbers you haven\u2019t blocked yourself.<\/td>It may not catch every spam call. Check your spam or filtered call list in case an expected call appears there.<\/td><\/tr>
TRAI DND preference<\/strong><\/td>Lets you register a preference to reduce promotional commercial communications through your telecom provider.<\/td>Reducing promotional calls and messages.<\/td>It does not block every unknown or suspected fraud call. TRAI\u2019s BLOCK PROMO<\/strong> option excludes service, transactional and government communications.<\/td><\/tr>
Phone\u2019s Do Not Disturb mode<\/strong><\/td>Silences calls and notifications according to the settings and exceptions you choose.<\/td>Quiet hours, meetings or times when you don\u2019t want interruptions.<\/td>It may silence calls without blocking the number. The call could still appear in your call history.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

In short:<\/strong> Blocking manages a specific number on your phone. Spam filtering helps identify possible spam, while TRAI preferences apply to promotional commercial communications. Your phone\u2019s Do Not Disturb mode silences interruptions based on your settings.<\/p>\n\n\n\n

How to Block a Number on Android<\/strong><\/h2>\n\n\n\n

Menu names may vary by phone model, Android version and Phone app.<\/p>\n\n\n\n

Using the Google Phone App<\/strong><\/h3>\n\n\n\n
    \n
  1. Open the Phone<\/strong> app.<\/li>\n\n\n\n
  2. Tap Recents<\/strong>.<\/li>\n\n\n\n
  3. Select the call from the number you want to block.<\/li>\n\n\n\n
  4. Tap Block \/ report spam<\/strong>.<\/li>\n\n\n\n
  5. Confirm your choice. Reporting the number as spam is optional.<\/li>\n<\/ol>\n\n\n\n

    To add a number that isn\u2019t in your call history:<\/p>\n\n\n\n

      \n
    1. Open the Phone<\/strong> app.<\/li>\n\n\n\n
    2. Tap More > Settings > Blocked numbers<\/strong>.<\/li>\n\n\n\n
    3. Tap Add a number<\/strong>.<\/li>\n\n\n\n
    4. Enter the number and confirm.<\/li>\n<\/ol>\n\n\n\n

      On a Samsung Galaxy Phone<\/strong><\/h3>\n\n\n\n

      To block a recent caller:<\/p>\n\n\n\n

        \n
      1. Open the Phone<\/strong> app.<\/li>\n\n\n\n
      2. Tap Recents<\/strong>.<\/li>\n\n\n\n
      3. Select the number, then open its details.<\/li>\n\n\n\n
      4. Tap Block<\/strong> and confirm.<\/li>\n<\/ol>\n\n\n\n

        To add a number manually:<\/p>\n\n\n\n

          \n
        1. Open the Phone<\/strong> app.<\/li>\n\n\n\n
        2. Tap More options > Settings > Block numbers<\/strong>.<\/li>\n\n\n\n
        3. Enter the number.<\/li>\n\n\n\n
        4. Tap Add<\/strong>.<\/li>\n<\/ol>\n\n\n\n

          Does Android Call Blocking Also Block Text Messages?<\/strong><\/h3>\n\n\n\n

          Not always. Call and text blocking may use separate settings on Android. If the number can still message you:<\/p>\n\n\n\n

            \n
          1. Open your Messages<\/strong> app.<\/li>\n\n\n\n
          2. Open the conversation with that number.<\/li>\n\n\n\n
          3. Find and select the app\u2019s Block<\/strong> option.<\/li>\n\n\n\n
          4. Confirm your choice.<\/li>\n<\/ol>\n\n\n\n

            Samsung Messages may have its own controls for blocking conversations.<\/p>\n\n\n\n

            How to Block a Number on iPhone<\/strong><\/h2>\n\n\n\n
              \n
            1. Open the Phone<\/strong> app.<\/li>\n\n\n\n
            2. Tap Recents<\/strong>.<\/li>\n\n\n\n
            3. Tap the Info<\/strong> button next to the number.<\/li>\n\n\n\n
            4. Scroll down and tap Block Caller<\/strong>.<\/li>\n\n\n\n
            5. Confirm your choice.<\/li>\n<\/ol>\n\n\n\n

              On iOS 26, review your blocked contacts under Settings > Privacy & Security > Blocked Contacts<\/strong>. On older iOS versions, check under Settings > Phone > Blocked Contacts<\/strong>.<\/p>\n\n\n\n

              How to Unblock a Number<\/strong><\/h2>\n\n\n\n

              Google Phone<\/strong><\/h3>\n\n\n\n
                \n
              1. Open the Phone<\/strong> app.<\/li>\n\n\n\n
              2. Tap More > Settings > Blocked numbers<\/strong>.<\/li>\n\n\n\n
              3. Select the number.<\/li>\n\n\n\n
              4. Tap Unblock<\/strong>.<\/li>\n<\/ol>\n\n\n\n

                Samsung Galaxy<\/strong><\/h3>\n\n\n\n
                  \n
                1. Open the Phone<\/strong> app.<\/li>\n\n\n\n
                2. Tap More options > Settings > Block numbers<\/strong>.<\/li>\n\n\n\n
                3. Find the number.<\/li>\n\n\n\n
                4. Tap the minus sign beside it.<\/li>\n<\/ol>\n\n\n\n

                  iPhone<\/strong><\/h3>\n\n\n\n
                    \n
                  1. Open Settings<\/strong>.<\/li>\n\n\n\n
                  2. Go to Privacy & Security > Blocked Contacts<\/strong> on iOS 26. On older versions, go to Phone > Blocked Contacts<\/strong>.<\/li>\n\n\n\n
                  3. Edit the list.<\/li>\n\n\n\n
                  4. Remove the contact.<\/li>\n<\/ol>\n\n\n\n

                    After unblocking a number, future calls or messages may reach you again. If the person contacts you through another app, check that app\u2019s block list too. Menu names may vary by phone model and software version.<\/p>\n\n\n\n

                    How to Reduce Promotional Calls in India<\/strong><\/h2>\n\n\n\n

                    Blocking one number won\u2019t stop every promotional call, especially if calls come from different numbers. You can also register a preference to reduce promotional commercial communications.<\/p>\n\n\n\n

                    TRAI lists BLOCK PROMO<\/strong> as an option for blocking promotional commercial communications across categories. Send BLOCK PROMO<\/strong> by SMS to 1909<\/strong>, or dial *1909*50#<\/strong>. This preference excludes service and transactional communications, as well as government communications. It does not block every unknown or suspected fraud call. <\/a><\/p>\n\n\n\n

                    For more information, read our guide to activating DND on Jio, Airtel, Vi and BSNL<\/a>.<\/p>\n\n\n\n

                    How to Report Suspected Fraud Calls<\/strong><\/h2>\n\n\n\n

                    If a call or message appears to be part of a suspected fraud, you can report it through Chakshu<\/strong> on the Department of Telecommunications\u2019 Sanchar Saathi portal. <\/a><\/p>\n\n\n\n

                    If you have already lost money, call the cybercrime helpline at 1930<\/strong> or report the incident through the National Cyber Crime Reporting Portal. <\/a><\/p>\n\n\n\n

                    For Businesses: Block Unwanted Callers Across Your Team<\/strong><\/h2>\n\n\n\n

                    A personal phone\u2019s block list applies to that device. Businesses that need to manage unwanted callers across a team can use a central call-blocking feature. Learn more about the CallerDesk blacklist feature for business calls<\/a>.<\/p>\n\n\n\n

                    Frequently Asked Questions<\/strong><\/h2>\n\n\n\n

                    What Is a Blacklist Number?<\/strong><\/h3>\n\n\n\n

                    It\u2019s a number you\u2019ve added to your phone\u2019s blocked list to restrict calls or messages from it.<\/p>\n\n\n\n

                    Does the Caller Know They\u2019ve Been Blocked?<\/strong><\/h3>\n\n\n\n

                    Your phone usually doesn\u2019t send the caller a direct notification. What happens when they call can vary by phone and network.<\/p>\n\n\n\n

                    Can a Blacklisted Number Still Send WhatsApp Messages?<\/strong><\/h3>\n\n\n\n

                    Yes. Blocking a number in your Phone app doesn\u2019t automatically block it in WhatsApp. Block the person separately in the WhatsApp app.<\/p>\n\n\n\n

                    How Many Numbers Can I Block?<\/strong><\/h3>\n\n\n\n

                    The limit depends on your phone and app. Check your blocked list to see the options available on your device.<\/p>\n\n\n\n

                    Will Blocking a Number Also Block SMS?<\/strong><\/h3>\n\n\n\n

                    Not always. Call blocking and message blocking may use separate settings, especially on Android. If texts continue, block the number in your Messages app too.<\/p>\n\n\n\n

                    What Should I Do If the Number Keeps Calling?<\/strong><\/h3>\n\n\n\n

                    Check that you blocked the correct number. If calls come from different numbers, block each one or use your phone\u2019s spam-filtering options. For suspected fraud, report the communication through Chakshu. If you have lost money, call 1930<\/strong>.<\/p>\n\n\n\n

                    Government Sources<\/strong><\/h2>\n\n\n\n