How to permanently block calls from unknown numbers on Xiaomi: from built-in tools to hidden MIUI settings

Every Xiaomi smartphone owner will eventually face intrusive calls from unknown numbers, from spammers, scammers or intrusive marketers. According to Truecaller, Redmi and POCO users receive an average of 12 spam calls a month in 2026, and in some regions the figure is as high as 30, a problem compounded by the fact that scammers often disguise numbers as official banking or government services using a caller ID swap.

In this article, we will discuss all the available ways to block unwanted calls on Xiaomi devices, from standard MIUI functions to hidden settings and third-party applications. Particular attention will be paid to the unique Blacklist 2.0 feature that appeared in firmware since MIUI 14 and allows you to block not only numbers, but also entire ranges (for example, all numbers with a code +375 for Belarusian spammers).

MIUI's built-in blacklist: how it works and why it sometimes doesn't block

The most obvious way is to use a built-in blacklist in the Phone app, but many users complain that it's unstable. MIUI There are two different blacklists: one for calling and one for calling. SMS. If you only add a number to the list SMS-The lockdown, the calls from him will still take place.

To properly block the number:

1. Open the Phone app and go to the Call Log.
2. Find an unwanted number, click on it and select Block (or Blacklist in older versions of MIUI).
3. Confirm the action and select Block Calls and Messages (important!).

If the number is already blocked, but the calls are continuing, check:

• 🔄 Firmware update: in MIUI 13 and below was an error that caused the blacklist to be reset after the reboot. MIUI 14+.
• 📱 Double. SIM-Cards: The lock is only valid for the SIM, The second card will have to be locked separately.
• 🛠️ Operator settings: some mobile operators (such as MTS or Beeline) override network-level locks, in which case only a call for support will help.

💡

If you frequently receive calls from international numbers (e.g. +234, +254), add the country code to the blacklist instead of the number itself. To do this, select the option "Block all numbers with this prefix" in MIUI 14+ when you lock.

2. configure the spam filter in the "Phone" application (hidden function)

Few people know, but MIUI has a built-in spam filter that you can customize, which is based on Xiaomi's database and user reports, to activate it:

1. Open the phone. → ⋮ (three-point) → Settings → Spam filter.
2. Turn on the spam filter switch.
3. Press the filter settings and select the level of protection: Low – blocks only obvious spam (bank scammers, robophones); Medium – adds blocking of numbers with suspicious prefixes (for example, virtual numbers); High – blocks all numbers not saved in contacts (risk of missing an important call!).

An important nuance: the spam filter works only for incoming calls, if you call from a locked number via WhatsApp or Telegram, these calls will not stop, but you need separate settings in the messengers.

3. Blocking through settings SIM-maps (method for advanced)

If embedded facilities MIUI It does not help, you can block the numbers at the level. SIM-This method works even if the call is bypassing standard locks (e.g., via VoIP). USSD-your operator's commands.

Instructions:

1. Find out. USSD-command to lock your operator: MTS: *111*123# (Then follow the voice cues: *110*789#. MegaFon: *130*1#. Tele2: *220*1#.

Phone.

Add the number to the operator's blacklist, and the lock usually takes effect in 10 to 30 minutes.

⚠️ Attention: Level locking SIM-The card is valid only for voice calls. SMS It will not stop Internet calls (VoIP), and some operators charge for this service (for example, MegaFon charges 3 rubles for each blocked number).

If USSD-Teams are not working, try it:

• 📞 Call the operator and ask to lock the number manually (clarify that you need a lock at the network level, not a lock at the network level). SIM).
• 🌐 Use your personal account on the operator's website (Security or Blacklist").

4 Third-party apps: Truecaller vs. Xiaomi's Blacklist

If the built-in tools fail, third-party apps come to the rescue.

• 📱 Truecaller is the largest database of spam numbers (more than 300 million records) and recognizes scammers even with fake callers. ID. Requires access to contacts and call history.
• 🔒 "Xiaomi's blacklist (official app in GetApps) works more stable than the built-in filter, but the spam base is less.
• 🛡️ Hiya, which specializes in locking robbrae and number scanners, is suitable for business users.
• 🚫 Should I Answer? – Analyzes real-time numbers and shows a trust rating.

How to configure Truecaller for maximum protection:

1. Download the app from Google Play or GetApps.
2. At the first start, allow access to Contacts, Call Log and SMS (without this, the filter will not work).
3. Go to Settings → Block → Autoblock and enable options: Block spam Block scammers Block hidden numbers

Blacklist.

⚠️ Warning: Truecaller transmits your contacts to its servers to form a database. If it is critical to you, use offline applications like Xiaomi's Blacklist or Call Blocker (without internet access).

5. Hidden MIUI settings: how to block all unknown numbers

MIUI 14+ has a hidden feature that allows you to block all calls from unsaved numbers, which is a radical method, but it is guaranteed to eliminate spam, to activate it:

1. Open Settings → Applications → Application Management.
2. Find the Phone app and select Permissions.
3. Scroll down and click on Additional Settings (or Special Access in some firmware).
4. Activate the option to block unknown numbers.

If you get a lot of calls from fake bank numbers, add your bank’s official numbers to your contacts (you can find them on the back of the card or on the website), and you will immediately see if it is a real number or a fake one.

+7 495

+7 800

+7 812

Add these prefixes to the blacklist if you don’t get a call from those regions.-->

7. blocking VoIP calls (WhatsApp, Viber, Telegram)

The standard MIUI locks do not work for Internet calls (VoIP), and to block them, you need to configure each messenger separately:

• 📲 WhatsApp: Open chat with unwanted contact. ⋮ → More. → Block. Confirm the lock (it works for both calls and messages).
• 💬 Viber: Go to More → Settings → Confidentiality → Blacklist. Add a number manually or select from a contact list.

Telegram

1. Open the contact profile.
2. Press. ⋮ → Block the user.

If you are being called from unknown VoIP accounts (such as Zoom or Skype), the only reliable way to do this is to turn off notifications of incoming calls in the settings of these apps.

1. Go to the messenger settings.
2. Find the Notifications or Calls section.
3. Turn off the option of incoming calls from non-contacts.

8.What to do if the lock does not work: diagnosis and solutions

If you have added a number to the blacklist, but the calls continue, make a diagnosis on this checklist:

If the problem persists, try:

• 🔄 Reset the settings of the Phone application: Go to Settings → Annexes → Application management → Phone. → Storage. Click Clear Data and Clear Cache. Reboot your phone and blacklist the number again.

Use it. ADB-team

If the lock is reset after rebooting, do:

adb shell settings put global blacklist_enabled 1

This command will force the blacklist to be activated at the system level.

Set up an alternative call

Apps like Google Phone or Simple Dialer have their own blacklists that can run more stable than the standard one.

⚠️ Note: If you use Xiaomi with custom firmware (like LineageOS or Pixel Experience), standard locks are available. MIUI In this case, install third-party applications or configure locking through Magisk modules (for example, Call Recorder & Block).

FAQ: Frequent questions about blocking calls on Xiaomi