How to remove a phone number from the blacklist on Android Samsung: a complete guide

Have you accidentally added an important contact to the blacklist on your Samsung Galaxy and now you can’t receive calls or SMS? Or, after updating the system, you discovered that the number you needed was blocked without your knowledge? This problem is more common than it seems - especially after migrating data between devices or doing a factory reset. Unlike the iPhone, where blocking management is centralized via iCloud, on Android (and even more so on firmware One UI from Samsung), solutions depend on the software version, phone model, and even the calling application used.

In this article we will look at all current methods of unlocking numbers from standard settings One UI to hidden ones application functions Contact and even manual editing of system files for advanced users. We will pay special attention to typical errors due to which a number can “disappear” from the black list, but the blocking remains. If you use Samsung Galaxy S23, A54 or an older model on Android 10+, the instructions below are suitable, taking into account minor differences in the interface.

1. Standard method: through the phone settings

The most obvious and safest method is to use the built-in tools One UI. It works on all Samsung devices starting with Android 9 (One UI 1.0) and later, but the layout of menu items may vary slightly.

To remove a number from the blacklist:

• 📱 Open the application Phone (handset icon on the main screen).
• ⚙️ Click on the three dots in the upper right corner and select Settings.
• 🔍 Go to the section Blocking numbers (or Blocked numbers in old versions).
• ❌ Find the desired number in the list and tap on the basket icon or icon − next to it.
• 🔄 Confirm deleting by clicking Done or OK.

If the number does not appear in the blocked list, but calls still do not go through, check additional filters:

• 📞 In the same section Blocking numbers the option Block unknown numbers or Spam filter (disable it) may be active.
• 🔍 Make sure that the number is saved in contacts - sometimes One UI blocks only “unknown” subscribers.

⚠️ Attention: On some firmware (for example, on Galaxy M33 with One UI 4.1), after removing a number from the black list, it is required restart the phonefor the changes to take effect. Without this, the lock may remain in the system cache.

2. Through the Contacts application (alternative method)

If the standard method did not work, try unblocking the number through the app Contact (or Google Contactsif you are using synchronization with a Google account). This method is especially useful if the number was blocked through Google services, and not at the Samsung firmware level.

Instructions:

1. Open the application Contact and find the desired contact (if it doesn’t exist, create a temporary one).
2. Tap on the contact, then click Edit (pencil icon).
3. Scroll down to the block Additional or More (on some models - Contact settings).
4. Find option Unblock number or Remove from black list.
5. Confirm the action.

If there is no unblocking option, then the number is blocked at level One UIand not via Google Contacts. In this case, return to first method or try the methods below.

Make sure the number is saved in contacts|Check the filter settings spam|Disable blocking of unknown numbers|Reboot the phone after the changes-->

3. Unblocking via Google Phone (for users of Google services)

Many owners Samsung use the application Google Phone instead of the standard dialer from Samsung. In this case, the blacklist is managed through your Google account, and its settings may conflict with One UI. If you see the notification “This number is blocked through Google services,” follow these instructions:

Steps to unblock:

• 🌐 Open your browser and go to the page Google Contacts (log in with the same account as on your phone).
• 🔍 Enter the blocked number in the search bar.
• 📋 Click on the contact, then select More → Unblock.
• 🔄 Synchronize contacts on your phone: go in Settings → Accounts and archiving → Account management → Google → Sync contacts.

If the number is not displayed in Google Contacts, but the blocking remains, check application settings Google Phone:

1. Open Google Phone (if not installed, download from Galaxy Store or Play Market).
2. Tap on three dots → Settings → Lock numbers.
3. Remove the number from the list or disable the option Spam and fraud filter.

⚠️ Attention: If you use dual SIM phone (for example, Galaxy S23 Ultra), the blocking may be tied to a specific SIM card. Check. settings for each SIM separately in the section Settings → Connections → SIM card manager.

4. Reset the settings of the “Phone” application and “Contacts”

Sometimes the blacklist gets stuck due to a failure in the application cache. This most often happens after updating One UI or restoring data from a backup. In this case, resetting the settings will help. without data loss:

How to reset settings:

• 📱 Go to Settings → Applications.
• 🔍 Find applications Phone and Contact (one by one).
• 🔧 For each, click Storage → Clear cache and Reset settings (do not delete the data!).
• 🔄 Reboot your phone.

After reboot, check if the number has disappeared from the blacklist. If not, try uninstall updates for the application Phone:

1. In the application settings Phone click on the three dots → Delete updates.
2. Confirm the action and restart the device.
3. Update the application again via Galaxy Store.

Why does resetting the cache not always help?

In some versions of One UI (for example, 5.1 on the Galaxy S21), the blacklist is stored not only in the cache, but also in a secure database contacts2.db. Clearing the cache deletes temporary files, but does not affect the main blocking settings. In this case, deeper intervention is required (see method 5).

Method	Suitable for	Risk of data loss	Reboot required
Standard settings	One UI 4.0+	No	Sometimes
Google Contacts	Google Accounts	No	No
Reset cache	Any versions	No	Yes
Manual database editing	Advanced users	High	Yes

5. Advanced method: editing the system database (for advanced users)

If all the previous methods did not work, the number could be blocked at the system database level. This method requires root access or the use of ADB, but allows you to remove the lock even if it is not visible in the interface. On devices with Android 12+ and One UI 4+, this method may reset Knox, which will void the warranty.

Instructions for users with root:

1. Install a file manager with root support (for example, Root Explorer or FX File Explorer).
2. Go to the path /data/data/com.android.providers.contacts/databases/.
3. Find the file contacts2.db and copy it to backup folder.
4. Open the file using a SQL editor (for example, SQLite Editor).
5. Run the query:

   DELETE FROM blocked_numbers WHERE number='PHONE_NUMBER';

   (replace PHONE_NUMBER with the current number in international format, for example, +79123456789).

6. Save changes, set file permissions 660 and reboot the phone.

For users without root, you can try ADB commands (does not require unlocking the bootloader, but does not work on all models):

1. Connect the phone to the PC and turn on USB debugging v Settings → About phone → Software information → Build number (tap 7 times).
2. Open the command line on your PC and run:

   adb shell content delete --uri content://call_log/blocked_numbers --where "number='PHONE_NUMBER'"

3. Reboot your phone.

6. Checking blocking at the operator level

If the number is still blocked, the problem may be on the side of your mobile operator. Some operators (for example MTS, Beeline, Tele2) provide spam blocking services that work regardless of phone settings. To check this:

Steps:

• 📞 Call the short number of your operator (for example, 0890 for Beeline or 111 for MTS).
• 🗣️ Request information about blocked numbers (usually this is the Black List or Antispam service).
• 📝 If the number is found, ask the operator to remove it from blocking.

Also check personal account on the operator’s website:

• 🌐 Log in to the official website (for example, lk.mts.ru for MTS).
• 🔍 Find the "Services" or "Security" section.
• ❌ Disable the "Anti-Spam" or "Number Blocking" services.

⚠️ Attention: Operator blocking services may be paid. Before disconnecting, check the tariffs - sometimes it’s easier to reconfigure your phone than to pay for disconnection.

7. What to do if the number has disappeared from the black list, but the blocking remains

The situation when a number is removed from all blocking lists, but calls still do not go through, occurs on Samsung s One UI 5.0+. The reason is a conflict between several levels of blocking (system, Google, operator) or a failure in the service com.android.server.telecom.

Solutions:

• 🔄 Forced reboot: press the buttons Power + Volume Down for 10 seconds until the phone reboots.
• 📴 Disabling IMS services: go to Settings → Connections → Mobile networks → Advanced settings → VoLTE and disable the option. Reboot the phone, then turn it back on.
• 🛠️ Reset network: v Settings → General management → Reset → Reset network settings. Attention: this will delete the saved ones Wi-Fi passwords.

If the problem persists, check call log:

• Open the application Phone → Log.
• Find a call attempt from a blocked number.
• If a blocking icon is displayed next to the number (🚫), tap on the call and select Unblock.

FAQ: Frequently asked questions about unblocking numbers on Samsung

Is it possible to unblock a number without access to the phone (for example, if it is lost or broken)?

Yes, if you had enabled Samsung account or Google. Go to the website Google Contacts or Samsung Contacts, find the number in the blocked list and unblock it. After restoring the phone from a backup, the blocking will not be applied.

Why did all the numbers from the blacklist disappear after the One UI update, but the blocking remained?

This is a known bug in One UI 4.0–5.0when data migration occurs with errors. Solution:

1. Make a backup copy of your contacts.
2. Delete your Google and Samsung account in the settings.
3. Reboot your phone.
4. Add accounts back and restore contacts.

Blocks should reset.

How to block a number so that it does not get blacklisted (for example, temporarily)?

Use Do Not Disturb mode with exceptions:

1. Go to Settings → Notifications → Do not disturb.
2. Turn on the mode and add the number to Exceptions → Allow calls from.
3. Select Contacts only and add the desired number.

So calls will go through, but the number will not be blacklisted.

Can a virus block numbers on Samsung?

Yes, some malicious applications (for example, fake “optimizers”) can modify system settings, including the blacklist. Check your phone using Samsung Knox or Malwarebytes, then reset the application settings Phone (see method 4).

How to find out if it is locked is my number with another Samsung subscriber?

There is no direct way, but you can check indirectly:

• 📞 Call from another number - if the call goes through, your number is most likely on the black list.
• 💬 Send an SMS: if the message is not delivered (error Not sent), this may indicate blocking.
• 📱 Ask the subscriber to check the settings (see method 1).

On Samsung c One UI blocked calls are not displayed in the log, and SMS are not delivered to the sender.