How to remove a number from the blacklist and unblock calls on Android

If calls from specific contacts do not go through, and the subscriber immediately hears short beeps or a busy message, most likely the number was accidentally blacklisted or there was a glitch in the Android filtering settings.

Unblocking contacts requires a careful approach, since the paths to the necessary menus may vary depending on the firmware version and model of your device. We will consider all current methods, from standard system settings to using third-party applications and telecom operator services.

Restoring communication with the right people is a simple process if you know where exactly the restriction setting is hidden. Below are detailed instructions that will help you regain the ability to receive calls from any subscribers.

Checking the built-in black list in the call application

The most common reason for blocking is the activation of the “Black List” function directly in the standard application for making calls. The interface may look different on devices Samsung, Xiaomi or “clean” Android, but the logic of actions remains the same.

You need to go to the “Phone” application and find the settings menu. It is usually hidden behind an icon with three dots in the corner of the screen or a gear. Look for the section “Blocking numbers”, “Blocked contacts” or “Blacklist”. This is where the list of those who are prohibited from calling is stored.

If you find the number you need there, just click on it and select the option to delete or unblock. In some shells, for example MIUI, you need to switch the toggle switch opposite the contact to the inactive position. After this, the changes take effect instantly.

• 📞 Open the “Phone” application and click on the three dots in the upper right corner.
• ⚙️ Go to the “Settings” section and find the “Blocking numbers” item.
• 🗑️ Click on the cross or the “Delete” button next to the number you want to unblock.

⚠️ Attention: On some smartphone models, the blocking function may be enabled by default for all unknown numbers. Check the “Block unknown numbers” setting and disable it if it is active.

It is worth noting that in new versions Google Phone, which is standard for many manufacturers, block list management is placed in a separate menu inside the application settings. If you do not see the required item, try updating the application through the store Play Market.

Blocking settings in the Android system menu

In addition to the call application, global call filtering settings can be found in the general system settings. This is especially true for devices with custom shells, where the manufacturer places security functions in a separate section.

Go to the main Settings of your smartphone. Scroll down to the System or Applications section. In some cases, the required item is called “Call Blocking” and is located in the “Security” or “Privacy” category.

Here you can manage not only specific numbers, but also spam blocking rules. The system can automatically detect suspicious calls and reject them. If this feature works too aggressively, it should be switched to “Warn” mode or completely disabled.

Settings → Applications → Phone → Access rights → Call blocking

Pay attention to the status of the SIM card. Sometimes the locking settings are tied to a specific SIM slot, especially in dual-SIM devices. Make sure you edit the list for the card through which calls should go through.

Third-party call blocking applications

Often users install additional apps to protect against spam, such as like Truecaller, Mr. Number or built-in antivirus modules like Dr.Web i Kaspersky. These applications have their own databases and filtering mechanisms that operate independently of the system.

If standard methods do not help, there is a high probability that blocking occurs at the level of third-party software. Go to the installed blocker application and check its internal blacklist. There may be a number that you accidentally added earlier or that was marked as spam by the database.

To disable blocking in such apps, you usually need to go to the “History” or “Blocks” section, find the contact and click the “Unblock” button. In some cases, it is easier to temporarily disable the application itself or delete it to check whether the connection is restored.

Application	Where to look for settings	Unlocking feature
Truecaller	Menu → Lock	Need to be removed number from the manual blocking list
Dr.Web	Antivirus → Filter	Can block by number mask
Mr. Number	Contacts → Blocked	Automatic blocking by region
Kaspersky	Call protection	Synchronization with cloud spam database

Do not forget that some system cleaners also have call protection modules. If you use such utilities, check their settings in the section Privacy or Security.

What to do if the application is not uninstalled?

If the application is blocked by administrator rights, go to Settings → Security → Device Administrators and uncheck the desired application before deleting.

Services of a telecom operator and external blocking

Sometimes the problem lies not in the phone, but on the side of the mobile operator. Telecom providers offer services like "Anti-identifier", "Blacklist" or parental controls that block calls at the network level.

In this case, the smartphone settings do not make any difference, since the call is rejected even before it reaches your device. To check the availability of active services, use USSD commands or the operator’s personal account.

For example, for many operators, commands like *110*771# or *900# allow you to manage the list of blocked numbers. It is better to check the exact codes on the official website of your provider, as they may change.

• 📱 Call the operator’s support service and ask to check the active blocking services.
• 🌐 Go to your personal account on the operator’s website in the “Services” or “Call Settings” section.
• 🔢 Enter the USSD code to disable the black list (check with your operator).

⚠️ Attention: Telecom operator services may be paid. Before enabling or disabling functions, check the pricing in the official source or your personal account, as conditions may change.

It is also worth checking whether the Do Not Disturb (DND) mode is enabled. While it doesn't block numbers permanently, it can create the illusion of blocking by silencing all incoming calls at a specific time.

Do Not Disturb mode and its effect on calls

Mode "Do not disturb" (Do Not Disturb) is a powerful tool that is often confused with blocking numbers. When it is active, the phone may not ring at all, or it may only let calls from selected contacts.

You can check the status of this mode in the notification shade. If the crescent moon icon is highlighted, the mode is active. Go to the mode settings to see the filtering rules. Perhaps there is a restriction of “Only favorites” or “No one.”

To allow calls, change the setting to “All contacts” or temporarily disable the mode. Also check the function's operating schedule: it may turn on automatically at night or during business hours when you are waiting for an important call.

Settings → Sound and vibration → Do not disturb → People → Calls

It is important to distinguish between complete silence and real blocking. In Do Not Disturb mode, the caller usually hears long beeps, while when blocked, he immediately hears a busy signal or forwarding.

Resetting the phone settings and drastic measures

If none of the above methods helped, there may be a software failure in the system that led to the communication module not working correctly. In such cases, resetting the phone application to factory settings helps.

This procedure will not delete your contacts or call history, but will return all dialing and blocking settings to their original state. To do this, go to the application settings, find “Phone” and select “Storage”, then click “Clear data” or “Reset settings.”

As a last resort, if the problem is systemic in nature and affects the entire operation of the smartphone, you may need to completely reset the device (Hard Reset). Before doing this, be sure to create a backup copy of all important data, as this operation will delete all files from the internal memory.

After resetting the phone application settings will prompt you to reconfigure permissions and settings. Monitor this process carefully so you don't accidentally activate spam blocking again.

Frequently asked questions (FAQ)

Why does the subscriber hear beeps even though I removed him from the blacklist?

This may be due to a delay in updating network settings or data caching on the operator's side. Try restarting your smartphone and ask the caller to call back in 5-10 minutes. Also check if a third-party application is blocking it.

Can I unblock a number if I forgot the password for the blocker application?

If you do not remember the password, the only solution is often to delete the application. Once deleted, its protection will no longer apply. However, if the application has administrator rights, you first need to revoke these rights in the Android security settings.

Does changing the SIM card affect the list of blocked numbers?

Android's built-in blacklist is usually tied to the device, not the SIM card. However, blockings configured through operator services are strictly tied to the phone number. When changing a SIM card, the operator settings are not automatically transferred to the new card.

How can I find out if a specific person has blocked me?

There is no direct way to find out. An indirect sign is that you constantly hear one beep and reset, or immediately get to an answering machine, while you can call this person from other numbers.

Resetting the phone settings will delete my contacts?

Resetting the settings of only the “Phone” application will not delete the contacts. A Hard Reset will delete everything. Always back up your contacts to your Google account before taking any drastic actions.