Spam and intrusive messages from unknown subscribers have become a real scourge for owners of modern smartphones. Advertising mailings, fraudulent offers and simply annoying contacts can disturb your peace at any time. Fortunately, the ecosystem Android provides powerful tools for filtering unwanted content directly at the device level.
In this article we will look in detail at how to block SMS from a specific number on Android, using both built-in system functions and third-party solutions. You will learn how to create “black lists”, set up smart filters and even block contacts through your telecom operator in order to completely protect yourself from digital waste.
Using the built-in functions of the Android system
Modern versions of the operating system from Google already contain the necessary protection mechanisms. You do not have to download additional software if your phone is running the latest firmware. The standard application Messages (Messages) has built-in functionality for managing contacts.
To add a number to the blacklist, open a dialogue with the unwanted sender. Click on the three dots in the upper right corner of the screen and select Details or Contact information. In the menu that opens, find the option Block and report as spam. After confirmation, all future messages from this subscriber will be automatically hidden.
However, the interfaces of different manufacturers may vary. For example, on smartphones Samsung the path may look different: go to the settings of the messages application itself, find the section Blocked numbers and manually enter the digital code or select a contact from the book. On devices Xiaomi this function is often integrated into the system antivirus or application Security.
⚠️ Attention: When blocked through a standard application, messages are not deleted, but are moved to a special “Spam” folder. Check this folder periodically so as not to accidentally miss an important notification from a bank or delivery service that the system may have misclassified.
MIUI, OneUI and EMUI shell interfaces are regularly updated. The layout of menu items may change after a major system update. If you do not find the described paths, use the search in the phone settings by entering the request “black list” or “blocking”.
Blocking through third-party antispam applications
If standard the functionality is not enough or it does not work correctly, specialized utilities come to the rescue. Applications like Call Blocker, Should I Answer? or complex solutions from Kaspersky i Dr.Web offer advanced filtering capabilities. They use extensive databases to identify spammers.
After installing such an application, you will need to grant it rights to read SMS and manage calls. This is necessary so that the app can intercept incoming data packets before they are displayed in the standard interface. In the application settings, you can create blocking rules based on number masks or specific prefixes.
One of the main advantages of third-party software is the ability to block entire ranges of numbers. For example, you can set up a filter so that it rejects all messages starting with a specific area code or short number often used by advertising services.
- 🛡️ Call Blocker — allows you to create complex rules and set up a blocking schedule.
- 📞 Should I Answer? —uses the community database to identify spammers and scammers.
- 🦠 Dr.Web —comprehensive protection, including antivirus and antispam modules.
Before installing any blocking application, carefully review the requested permissions. If a simple blocker requires access to your photos or microphone, this is a reason to refuse to install it in favor of a more secure analogue.
Setting up filtering through the phone settings menu
Global device settings also allow you to manage the list of prohibited contacts, regardless of the specific messaging application. This method is especially useful if you want to block a number not only for SMS, but also for incoming calls at the same time.
Go to the general menu Settings of your smartphone. Find the section responsible for security or application management. In some versions of Android, this item is called Special features or Call blocking. Here you will see a general list of blocked numbers, which is synchronized with the phone book and instant messengers.
Adding a contact here ensures that the system rejects a communication attempt at the radio module level. This means that the phone will not even vibrate or light up the screen when receiving a message from a blacklisted subscriber. To add a new number, click on the plus sign + and enter the data manually or select from contacts.
☑️ Check blocking settings
Blocking service from a mobile operator
When software methods do not give the desired result, you can use the services of a cellular operator. Most major providers offer Antispam or Blacklist services that operate on the network side. This means that the message will not even reach your device, which saves battery power and traffic.
Connection of such services is usually paid, although some operators provide basic functionality for free. Activation often occurs through USSD commands or a personal account on the operator’s website. For example, to add a number to the black list, you may need to send a command like *111*number#.
| Operator | Service name | Cost | Activation command |
|---|---|---|---|
| MTS | Black list | 1.5 rub/day | *111*442# |
| Beeline | Black list | 3 rub/day | *110*771# |
| MegaFon | Antispam | Free (base) | Via application |
| Tele2 | Black list | 1.5 rub/day | *220*4*number# |
⚠️ Attention: Operator services may have restrictions on the number of numbers in the list (usually up to 40 contacts). In addition, blocking on the network side may take up to 24 hours to take effect after connecting the service.
What to do if the service does not work?
Sometimes operator services conflict with phone settings. Try disabling the built-in lock on your smartphone and leaving only the operator lock, or vice versa. Also make sure that there are funds on your balance to write off the subscription fee for the service.
Blocking short and service numbers
A separate difficulty is in blocking messages from service short numbers (5 digits), which are often used by banks, shops and taxi services. Standard methods of blocking a specific number are not always effective here, since mailings can come from different ends of the same gateway.
To solve this problem, use the keyword blocking function. In the application settings Messages find the “Spam Filters” or “Word Ban” section. Add there the names of services from which you do not want to receive notifications, for example, the name of the store or the word “promotion.”
There is also a radical method - disabling the reception of messages from service centers (SMSC). However, this is not recommended for regular users, as you may no longer receive verification codes for logging into banking applications or government services. If you decide to take this step, use special engineering codes or applications like SMSC Helper.
- 🔑 Add the words “code”, “password”, “bonus” to the filter if you want to filter out all advertising.
- 🚫 Be careful when blocking the words “confirmation” or “bank” so as not to lose access to accounts.
- ⚙️ Use the "Unknown numbers" mode to hide all messages from those who are not in your phone book.
Blocking by keywords is the most effective way to deal with mass mailings from different short numbers of one advertiser.
Frequent questions and problems with blocking
Despite the abundance of tools, users often encounter nuances that require clarification. Below are answers to the most popular questions that arise during the process of setting up anti-spam protection.
Will the sender see that I have blocked his messages?
No, the sender will not receive any notification about the blocking. The message will be delivered to his side with the status “sent”, but it simply will not appear on your device. The sender can guess this only by the lack of a response for a long time.
Is it possible to recover deleted or blocked SMS?
If a message ends up in the Spam folder inside the application, it can be restored by simply moving it to the Inbox. If the message was deleted automatically by the application settings or blocked by the telecom operator before it arrived on the phone, it is impossible to restore it.
Does blocking a number affect the ability to make calls?
In most cases, yes. When you add a number to the blacklist through Android system settings, both incoming calls and SMS messages are blocked. If you need to block only texts, leaving the possibility of calling, use third-party applications with flexible script settings.
Why do I still receive SMS from similar numbers?
Spam senders often use a pool of numbers, changing the last digit or prefix. Blocking one specific number will not protect you from other numbers of the same service. In such cases, it is more effective to use blocking by keywords or activate the antispam service of the operator.
How to unblock a number if I added it by mistake?
Go to the settings of the messages application or to the “Black List” section in the general settings of the phone. Find the desired number in the blocked list, click on it and select the “Unblock” option or the trash can icon to remove from the list.