Constant calls from intrusive advertising agents, scammers or ex-partners can seriously poison your life and disturb your peace of mind. Fortunately, a modern operating system Android provides built-in tools to deal with unwanted contact. The process of adding a contact to the blacklist (BL) may vary slightly depending on the manufacturer of your smartphone and the version of the shell, but the general principle remains the same for the entire ecosystem.
In this article we will analyze in detail all the available blocking methods: from standard dialer settings to using third-party applications and secret USSD codes. You will learn how to effectively isolate yourself from spam and what to do if the number you need is accidentally blocked.
The ability to manage a list of blocked contacts is a basic digital hygiene skill. Correctly setting up call filtering not only saves time, but also increases your psychological security. Let's look at the technical side of the issue so that you can take control of your phone.
Using the built-in functions of “Phone”
The fastest and most accessible method is to use the functionality of the standard calling application, which is pre-installed on each device. In “pure” Android and shells from Google, this process is as simplified and intuitive as possible. You do not need to download additional software or have superuser rights.
First, open the application Phone and go to the tab with call history or contact list. Find the number you want to block and tap on it to open the contact card or action menu. Usually, a long press (tap) on a number in the list is enough for a context menu to appear.
In the list of options that appears, select the item Block or Block number. The system may request confirmation of the action, since this is an irreversible operation for the current communication session. After confirmation, the subscriber will no longer be able to reach you, and his messages will be hidden.
⚠️ Attention: on some smartphone models, for example Samsung or Xiaomi, interface may vary. If the “Block” item is not in the quick menu, look for it inside the detailed information about the contact by clicking on the “i” icon or three dots in the corner of the screen.
Different manufacturers implement this functionality in their own way, so it is important to know the features of your interface. Below is a table with paths to blocking settings for popular brands:
| Smartphone brand | Path to blocking settings | Features |
|---|---|---|
| Google Pixel / Motorola | Phone → Three dots → Settings → Blocked numbers | Standard Android interface |
| Samsung | Phone → Three dots → Settings → Blocking numbers | There is a separate list for spam |
| Xiaomi (MIUI) | Phone → Settings → Antispam → Black list | Powerful built-in filter |
| Huawei / Honor | Phone → Four dots → Blocked | Integration with the fraudster database |
Blocking through the system settings menu
If the quick method through the call log does not suit you or you want to set up global filtering rules, you should contact system menu. Here you can not only add a specific number, but also enable blocking of all hidden numbers or unknown callers.
Go to the general Settings of your smartphone and find the section responsible for applications or security. Depending on the version Android, this item may be called “Applications and notifications”, “Security” or “System applications”. Select the application Phone from the list of installed apps.
Inside the application menu, find the section Blocking numbers. Here you will see switches for different types of locks. You can activate the “Block unknown numbers” function, which will prevent calls from those contacts that are not in your address book.
Also in this section there is usually a button Add a number. By clicking on it, you can manually enter any phone number that you want to blacklist. This is convenient if you have a list of spammers, but you don’t want to save them to your contacts or look for them in your history.
Periodically check the list of blocked numbers. Sometimes couriers or important business partners who have changed their phone number accidentally end up there.
System settings allow you to create a more flexible security policy than simply blocking one contact. You can combine manually adding numbers with automatic filters. However, it is worth remembering that blocking all unknown numbers may cause you to miss an important call from a doctor or delivery service.
Using third-party filtering applications
Standard tools are good, but they do not always have sufficient flexibility or up-to-date databases of spam numbers. Third-party applications from the store Google Play offer advanced functionality: automatic spam detection, blocking by number mask and even recording conversations.
One of the most popular solutions is the application Truecaller or its analogues, such as Call Blocker. Once installed and given the necessary permissions, these apps begin analyzing incoming calls in real time. They check the number against a huge online database of user complaints.
To set up a blacklist in a third-party application, follow these steps:
- 📱 Download and install the selected application from the official store.
- 🔐 Grant permissions to access the call log and contacts upon first launch.
- ⚙️ Go to the "Blocking" or "Blacklist" section in the application menu.
- ➕ Click the add button and select the type of blocking (by number, by name or by the beginning of the number).
⚠️ Attention: many free versions of blocking applications contain advertising or require a paid subscription to access premium features such as blocking hidden numbers.
Using third-party software provides the advantage of constant updates of spam databases. If a number starts sending out mass advertisements, it will quickly appear in the application's database, and your phone will block it automatically, even if you have not encountered it before.
Why do applications require so many permissions?
Call blocking applications require access to the call log in order to intercept the incoming signal before the phone starts ringing. Without this permission, they can only record the fact of the call after the fact, but not prevent it.
Universal method through USSD codes
There is a blocking method that works at the level of the telecom operator, and not the phone itself. This method is useful if you have changed smartphones but want to keep your lock settings, or if your phone is turned off. It is implemented by entering special commands into the dialing field.
Commands may vary depending on your mobile operator (MTS, Beeline, MegaFon, Tele2). Usually, to activate the Black List service, you need to enter a code of the form *110*771# or similar. After sending the command, you will receive an SMS confirming the activation of the service.
To add a specific number to the blocking list through an operator, a command in the following format is often used:
*110*771*7#phone_number#Where instead phone_number you need to substitute the subscriber's digits without the plus and parentheses. For example, for the number +79991234567 the command will look like *110*771*7#79991234567#.
It is important to understand that the services of a telecom operator are often paid. The monthly subscription fee can range from 1 to 3 rubles for each blocked number or a fixed amount for the service. It is better to check the exact tariffs in your operator’s personal account.
☑️ Check before connecting the operator’s service
Managing the list of blocked contacts
Life situations change, and what was relevant yesterday may require revision today. Therefore, it is critical to know how to view your list of blocked numbers and, if necessary, remove a contact from it. This applies to both built-in tools and third-party applications.
To remove a number from the black list on a standard Android, go back to the application Phone, open the settings menu and select Blocked numbers. You will see a list of all current blocks. Next to each number there is usually a cross or a trash can icon.
Click on the delete icon next to the desired subscriber. The system will ask for confirmation: “Unblock the number?” Confirm the action. After this, the subscriber will again be able to call you and send SMS messages, which will be displayed as usual.
If you used a third-party application, the logic is similar: go to the “Black List” section inside the application, highlight the desired contact and select the “Unblock” or “Delete” option. In telecom operator services, to unblock you often need to enter the USSD deactivation code or delete the number through your personal account on the website.
Remember: deleting a number from the blacklist does not restore deleted messages or the history of missed calls during the blocking period. This data is irretrievably lost.Frequently asked questions and problem solving
Despite the simplicity of the procedure, users often encounter nuances that raise questions. For example, why a blocked subscriber can still get through, or where his messages go. Let's look at the most popular situations.
Sometimes it happens that a number is added to an emergency situation, but calls go through. This may be due to the fact that the subscriber is calling from another number or is using Internet telephony (Wi-Fi calls), which the phone does not always filter correctly. It is also worth checking whether the blocking function was accidentally disabled after a system update.
As for SMS, on most modern smartphones messages from blocked contacts do not appear in the general inbox list. They are moved to a special Spam or Blocked Messages folder inside the Messages app. You can check this folder in the messenger settings.
Will the subscriber see that I have blocked him?
The subscriber will not receive a direct notification about the blocking. However, when calling, he will hear short beeps or an answering machine message “subscriber busy” or “unavailable”, depending on the settings of your operator and phone. This may prompt him to think about blocking.
Is it possible to block an entire range of numbers?
You cannot block a range (for example, all numbers starting with certain numbers) using standard Android tools. This function is supported only by some third-party applications, such as Call Blocker, where you can set a number mask.
What happens if I call a blocked number myself?
The black list only works for incoming calls and messages. You will be able to freely call or text a person who is on your block list. The restriction only applies in one direction.
How to block an unknown number that is constantly changing?
To deal with numbers that change with every call, use the “Block unknown numbers” function in your phone settings. This will prohibit calls to anyone who is not listed in your phone book.