How to permanently block left numbers on Android: 7 proven methods

Spam calls from unknown numbers have become a real disaster for smartphone owners. Fraudsters, marketers and robots attack subscribers several times a day, distracting them from business and creating unnecessary stress. It is especially unpleasant when such calls come at night or during important meetings. Fortunately, Android offers several effective tools to combat this problem - from built-in functions to third-party applications.

In this article we will look at all possible ways to block unwanted calls: from basic phone settings to advanced solutions using Google Phone, Truecaller and other services. You'll learn how to block a specific number, entire ranges, and how to set up automatic spam filtering. And also - what pitfalls may be encountered along this path and how to get around them.

1. Built-in blocking of numbers in the standard Phone application

The easiest way to stop annoying calls is to use the built-in functions of the application Phone (or Google Phoneif it is installed by default). This method works on all modern versions Android (starting from 8.0) and does not require the installation of additional apps.

To block a number:

• 📱 Open the application Phone and go to Call log.
• 🔍 Find the number you want to block and click on it.
• ⚙️ In the menu that opens, select Block or Block number (the name may vary depending on the firmware).
• ✅ Confirm the action in the window that appears.

On some devices (for example, Samsung or Xiaomi) the path may be slightly different. If there is no standard blocking item, try:

1. Press the number in the call log.
2. Select in the context menu Add to blacklist.

Is the number saved in contacts?|Is this definitely spam and not an important call?|Is blacklist synchronization enabled on your phone with a Google account?|Have you checked if this number is included in the exceptions?-->

⚠️ Attention: On some firmware (for example, MIUI from Xiaomi), blocking through the standard application may not work for SIM cards of some operators. In this case, use the alternative methods from the following sections.

2. Setting up automatic spam filtering in Google Phone

If you have the application installed on your phone Google Phone (default on Pixel, Nokia, Motorola and some other devices), you have access to a powerful tool - built-in spam call filtering. This feature analyzes incoming calls in real time and automatically blocks suspicious numbers.

To enable filtering:

1. Open Google Phone and click on the three dots in the upper right corner.
2. Select Settings → Spam and calls → Spam filter.
3. Activate the switches:
   • 🛡️ Filter spam calls
   • 📊 Show caller ID and spam

After activation, all potentially dangerous numbers will be marked as Spam or Fraud, and some will be blocked automatically. You can also view the list of blocked calls in the section Spam history.

⚠️ Attention: The spam filtering function Google Phone requires an Internet connection. If you are often offline, this method may be less effective.

3. Using the blacklist through Android settings

On some devices (especially with custom firmware, such as EMUI from Huawei or One UI from Samsung) the blacklist is not controlled through the app. Phone, but through the system settings. This allows you to block numbers globally, regardless of the calling application used.

Instructions for most firmware:

1. Go to Settings → Applications → Phone → Block numbers (path may vary).
2. Select Add number and enter it manually or select from the log.
3. Save changes.

On Samsung the path looks like this:

Settings → Notifications → Advanced → Blocking numbers

On Xiaomi (MIUI):

Settings → SIM cards and mobile networks → Call blocking

What to do if there is no "Blocking" item numbers" in the settings?

On some budget smartphones (for example, from Tecno or Infinix) this section may be missing. In this case, use the application from the operator or third-party apps like Truecaller.

4. Blocking through telecom operator applications

Many Russian operators (MTS, Beeline, MegaFon, Tele2) offer their own services to combat spam. These solutions are often integrated at the network level, so they block calls before they even reach your phone.

Here's how to connect protection from popular operators:

Operator	Connection method	Cost
MTS	Send SMS with text PROTECTION to number 1116 or through your personal account	Free
Beeline	Install the application My Beeline → Section Spam protection	Free
MegaFon	Activate the service Spam filter via USSD-command: *105*499#	Free
Tele2	Send SMS with text STOP SPAM to number 1550	Free

⚠️ Attention: Operator services can block not only calls, but also SMS spam. However, the effectiveness depends on the operator's database - some new fraudulent numbers may slip through.

The advantage of this method is that it works even if your Internet is turned off or you are using a different phone. But there is also a minus: when changing the operator, the settings will have to be reconfigured.

5. Third-party applications: Truecaller, Hiya and others

If the built-in tools fail, specialized applications come to the rescue. The most popular of them is Truecaller, which uses a global database of spammers and scammers, updated by users from all over the world.

How to configure Truecaller for maximum protection:

• 📥 Install the application from Google Play.
• 🔑 Register (you can via Google or phone number).
• ⚙️ In the settings, enable:
  • 🛡️ Spam blocking
  • 🔔 Spam notifications
  • 🌍 Global spam database
• 📵 In the section Blocking add numbers manually or activate automatic blocking by category (scammers, telemarketing, etc.).

Alternative applications:

• 🔍 Hiya —specializes in blocking robocalls.
• 📞 CallApp —offers advanced settings for business users.
• 🛡️ Should I Answer? —analyzes numbers in real time.

⚠️ Attention: Some anti-spam applications require access to your phone book and call history. Before installation, check permissions and read the privacy policy.

6. Blocking ranges of numbers and unknown callers

If you are inundated with calls from numbers in one region or operator (for example, +7 9xx xxx-xx-xx), you can block entire ranges. For this, applications like Call Blocker or Blacklist.

Example of settings in Call Blocker:

1. Open the application and go to the section Black list.
2. Select Add rule → By mask.
3. Enter a pattern, for example:
   • +7926* - will block all numbers MTS Moscow.
   • +7495* — will block Moscow landline numbers.

Save the rule.

To block all unknown numbers (those that are not saved in contacts):

• 📱 V Google Phone: Settings → Spam and calls → Filter unknown numbers.
• 🔧 B Truecaller: Settings → Blocking → Block unknown numbers.

⚠️ Attention: Blocking ranges can lead to missing important calls (for example, from delivery services or banks). Use this method carefully and check your blocked call log regularly.

7. Additional measures: two-factor authentication and alternative numbers

If spam calls are associated with leakage of your number (for example, after registering on dubious sites), consider the following steps:

• 🔄 Change the main number for important services (banks, social networks) to a virtual one (for example, via Google Voice or SMS-activate).
• 🔒 Enable two-factor authentication wherever possible, but link it to an email or authenticator application, and not to SMS.
• 📵 Use the second SIM for registrations on sites - this way the main number will remain clean.
• 🛡️ Check for data leaks on the website Have I Been Pwned and remove your number from public databases.

Important: If you start receiving calls asking you to “call back about an important matter” or threats on behalf of banks is 100% fraud. Never call back to unknown numbers or confirm any actions via SMS.

💡

A combination of methods gives the best result: use the built-in blocking, applications, and operator services. Regularly update spam databases in antispam applications.

FAQ: Frequently asked questions about blocking spam calls

🔍 How to find out who called from a blocked number?

Blocked calls are usually not displayed in the main log, but they can be found:

• In Google Phone: History → Spam.
• In Truecaller: section Blocking → Log.
• On Samsung: Phone → Three dots → Settings → Blocking numbers → Blocking log.

If the number is not detected, try entering it manually in a search engine or on the website Numbo.

📵 Why does blocking not work on some numbers?

Possible reasons:

• The number is used substitution of Caller ID (spoofing) - scammers fake the outgoing number, and it is different every time.
• The call is made through VoIP (WhatsApp, Viber, SIP) - blocking by standard means does not affect it.
• The operator does not support blocking at the network level (rare, but happens with virtual operators).

Solution: use applications that block calls at the system level (for example, Truecaller with root access or Call Blocker in device administrator mode).

🔄 How to transfer the black list to a new phone?

Transfer methods:

• 🔻 Via Google account: If you used Google Phone, the black list is synchronized automatically when you log into the same account.
• 📤 Export/import: B Truecaller You can export the list to a file and download it to a new device.
• ⚙️ Manual transfer: Take screenshots or write down numbers from the blocking log, then add them manually.

For operator applications (for example My Beeline), you will have to configure the blocking again.

🛡️ Is it possible to block SMS spam using the same methods?

Yes, most methods work for SMS:

• V Google Messages: Settings → Spam and protection → Enable anti-spam protection.
• V Truecaller: blocking also applies to messages.
• For operators: services like Spam filter from MegaFon block both calls and SMS.

For advanced SMS filtering you can use SMS Blocker or Textra SMS.

🚨 What to do if scammers call from numbers of banks or government agencies?

This is a classic spoofing technique - replacing a number. Even if the number is displayed on the screen +7 495 123-45-67 (for example, supposedly from Sberbank), this does not guarantee its authenticity.

Actions:

• 📵 Do not answer such calls. If the “bank” calls, call back using the official number from the website or card.
• 🔍 Check the number through Truecaller or Ministry of Internal Affairs service.
• 📋 Report fraud:
  • To the bank (via the official application or website).
  • To the operator (for example, MTS accepts complaints about the number 0890).
  • To the portal Dozor.rf.