How to Block a Phone Number on Xiaomi: All Ways to 2026

Spam calls, intrusive collectors, or former partners can all be the reasons for blocking a number on Xiaomi. Fortunately, MIUI firmware (including versions 14 and 15) offers several built-in tools for this task, and third applications expand the capabilities. But how exactly do you do this when the interface changes from model to model? In this article, we will discuss all the current methods of blocking, from the standard “blacklist” to hidden functions and third-party services.

It’s important to understand that locking works differently depending on the MIUI version and regional firmware. For example, on the global versions (MIUI Global), the menu may differ from the Chinese ones (MIUI China), we take these nuances into account and show universal solutions that will work on the Redmi Note 12, POCO X5, Xiaomi 13 and other popular models, and we will also discuss what to do if the lock does not work, and how to check whether the number is actually added to the blacklist.

Standard lock via "Phone" (MIUI 14/15)

The easiest way is to use the built-in Phone app, which works on all Xiaomi smartphones regardless of model, as long as the official firmware is installed. The instructions are relevant for MIUI 14 and 15, but may differ slightly on older versions (for example, MIUI 12).

To block the number:

1. Open the phone application (icon with a handset).
2. Go to the Journal section (the icon of the clock at the bottom of the screen).
3. Find the number you want in the incoming/outgoing call list and click on it.
4. In the window that opens, tap three points (⋮) top-right.
5. Select Block Number (or Add to Blacklist in English firmware).
6. Confirm the action by pressing OK.

After that, the number will be automatically added to the blacklist, and calls / SMS from it will cease to come. Importantly, blocking through the Phone application does not apply to messengers (WhatsApp, Telegram, etc.) - they need separate settings.

Number saved in contact?|Is there a duplicate of this number in the journal?|Is blacklist synchronization enabled with Mi Account?|Have the "Do Not Disturb" settings been checked"?

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2. Manage the blacklist in the settings

If you want to block a number that hasn't called (like a potential spammer) or edit an existing blacklist, do so through system settings. This method gives you more control than blocking through a call log.

Instructions for MIUI 14/15:

1. Open the settings (cog icon).
2. Go to the Appendix section → Application management.
3. In the search bar, enter the Phone and select the appropriate application.
4. Slip on Number Blocking (or Blacklist).
5. Click Add the number (+) and enter it manually.
6. Save the changes.

You can do this here.

• 🔍 View all blocked numbers.
• 🗑️ Remove numbers from the blacklist (swipe left or button Remove).
• 🔄 Enable/disable SMS lock (separate switch).
• ☁️ Sync the list with Mi Account (if the option is enabled Sync data in the account settings).

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If there are more than 500 numbers on the blacklist, the system may start to slow down when processing incoming calls.

Blocking through the “Messages” app

SMS spam is a separate headache. Fortunately, Xiaomi allows you to block numbers directly from the Message app, with additional filtering options, which is useful if you are flooded with promotional mailings or fraudulent messages.

How to block the number in SMS:

1. Open the Messages app.
2. Find the dialog with the right number and open it.
3. Tap on three points (⋮) top-right.
4. Choose Block (or Block)
5. Confirm the action by selecting Block the number or Block and delete (in the second case, all messages from this number will be erased).

Additional SMS filtering settings:

• 📧 Enable Spam Filter in Messages Application Settings (Settings) → Spam filter).
• 🔍 Add keywords for automatic locking (e.g., “winning”, “credit”, “renewal").
• 🌐 Block SMS from international numbers (Block international messages).

Every day.|Several times a week|Nearby|Never.

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4.Use of the application "Security" (Security)

Xiaomi’s Security app is not only an antivirus, but also a privacy management center, and you can configure advanced number locking, including protection against fraudulent number swapping calls.

How to set up a lock through Security:

1. Open the Security app (shield icon).
2. Go to Block or Protect against Spam (name depends on the version of MIUI).
3. Select Call Blocking or Blacklist.
4. Add the number manually or import from the call log.
5. Activate the option to Lock Unknown numbers if you want to screen out calls from hidden identifiers.

Advantages of this method:

• 🛡️ More aggressive spam filtering compared to the standard phone app.
• 📊 Blocked Calls Statistics (you can see how many calls were screened out).
• 🔄 The ability to create a whitelist – only allow calls from certain numbers.

5. Third-party applications for blocking

If Xiaomi’s built-in tools aren’t enough, you can use third-party apps that offer advanced features such as:

• 🌍 Global spammer databases (updated in real time).
• 🤖 Automatic determination of robbrae.
• 📊 Detailed statistics and reports.
• 🔕 Blocking on keywords in voice (e.g., “credit”, “debt").

Top.-3 Applications to block on Xiaomi:

Before installing third-party applications, consider:

⚠️ Attention: Some blocking apps require permission to read call logs and SMS. This can create a risk of data leakage if the app is from an unreliable developer!

6. Hidden functions: blocking through USSD-code

Few people know, but on some Xiaomi firmware (especially on the Chinese versions) you can control the blacklist through the Internet. USSD-This method is useful if the standard interface is not available (for example, due to a system failure).

Instructions:

1. Open the Phone app.
2. Go to the Set (keyboard) tab.
3. Enter one of the commands: ##4636## or ##2527##
4. In the menu that opens, select Blacklist or Call Blocking.
5. Manage the list of blocked numbers through the engineering menu.

Warning: USSD-The commands may vary depending on the carrier and the regional firmware. Some commands (e.g. #4636##) open the engineering menu where careless changes to settings can cause the phone to malfunction.

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USSD-Teams are a powerful but dangerous tool, and only use them if standard locking methods don't work and you're confident in your actions.

7 Problems and Solutions: Why the Lockdown Doesn't Work

Sometimes blocked numbers keep calling, and let's look at the typical causes and ways to fix them:

If nothing helps, try resetting your network settings:

1. Go to Settings. → SIM-maps and mobile networks.
2. Select Network Resetting.
3. Confirm the action (this won’t delete your data, but will reset your mobile network and Wi-Fi settings).

⚠️ Note: On some Xiaomi firmware (especially Chinese) number locking may conflict with Dual Apps. If you use a cloned Phone app, locking may not work properly.

FAQ: Frequent questions about locking numbers on Xiaomi