How to permanently disable spam calls on Xiaomi: 7 working ways

Spam calls have become a real scourge of our time: scammers, intrusive marketers and robot informers pursue subscribers around the clock. Owners of Xiaomi smartphones have a unique advantage - firmware MIUI It offers one of the most powerful built-in spam control tools of any Android device, but most users only use 20% of its capabilities.

In this article, we’ll break down not only basic lock settings in Settings → Spam, but also the hidden features of MIUI 14/15, which allow you to filter calls by geolocation, analyze subscriber behavior, and even block entire pools of operator numbers. You’ll learn how to set up security so that you don’t miss an important call from a bank or delivery service, but also get rid of intrusive “managers” with loan offers forever.

We will focus on the problems faced by users of Redmi Note 12, POCO X5 and Xiaomi 13T models, where standard settings sometimes work incorrectly due to the peculiarities of regional firmware. All methods are tested on current versions of MIUI (including global and Chinese builds) and do not require root rights.

1. Built-in spam filter in MIUI: hidden opportunities

Most users limit themselves to turning on the Spam Filter option in their phone settings, but MIUI offers a lot more tools. Let's take a look at them in detail.

The first step is to activate advanced protection. Go to: Settings → Spam → Spam filter settings. There are three layers of protection available: Basic (blocks only obvious spam), Moderate (recommended – analyzes subscriber behavior) and Aggressive (can block legitimate calls from organizations).

• 🔍 Conduct analysis: MIUI It tracks how often you get calls from the same number and how long you have conversations, and suspicious activity numbers (short calls from different numbers) are automatically blacklisted.
• 🌍 Geolocation Filtering: Blocks calls from regions you have never interacted with (e.g. if you are in Moscow and the call came from Dagestan).
• 📊 Cloud Database: Xiaomi Aggregates Spam Data From All Devices to the Web MIUI. If the number is marked as spam 100+ Users are automatically blocked.

One important nuance: MIUI 15 has a Smart Spam Assistant feature that learns from your actions, so if you manually lock a number, the system remembers the signs (prefix, call time, duration) and applies those patterns for future filtering, and to activate training, you need to lock at least 5 numbers manually.

2. Blacklist vs. Whitelist: Which is more effective?

Many users mistakenly believe that a blacklist is the best way to fight spam, but in practice, a whitelist often works better, especially if you get few important calls.

To set up the white list:

1. Go to Contacts → Settings → Blocking numbers
2. Select "Allow calls only from saved contacts"
3. Add to the exceptions the numbers of banks, delivery services and other important organizations through Add to the white list

A critical feature of MIUI is that when you activate the whitelist, the system automatically adds a number from the past 30 days to the exceptions, which means that if you received a call from a courier a week ago, your number will not be blocked. To disable this behavior, go to Settings → Spam → Additional settings → Synchronize history and deactivate the option.

Activate a moderate spam filter in MIUI|

Add important numbers to the whitelist |

Turn off call history synchronization |

Enable the Xiaomi | cloud database

Check the regional lock settings-->

3. Hidden MIUI settings for advanced users

MIUI firmware contains several hidden features that are not dokumented in official manuals, but significantly enhance spam protection.

One of the most useful is the prefixed number lock, for example, you can block all numbers starting with +375 (Belarus) or +7928 (Dagestan) if you never get a call from there.

1. Enter the code in the phone app: ##4636##
2. Go to the menu "Phone Information"
3. Select "Spam Settings" → Extended rules"
4. Add prefixes in the "Blocking by template" field

Another hidden possibility is to analyze tonal signals. MIUI can recognize the characteristic sound patterns of spam calls (e.g., robots often use specific tonal sequences when connecting). ADB:

adb shell settings put global spam_call_audio_analysis 1

After that, the system will analyze the first 3 seconds of the conversation and block calls with suspicious beeps.

4. Third-party applications: when embedded tools are insufficient

Despite the powerful functionality MIUI, Sometimes you need to use additional tools.-3 Spam Blocking Apps Optimized for Xiaomi:

• 🛡️ Truecaller: Has a database of 300 million numbers, integrates with the MIUI Minus: requires registration and collects data about your contacts.
• 🔒 ACR Phone: Lightweight, open source app that supports locking by regular expressions (e.g., you can block all types of numbers) +79XX123****).
• 🤖 Should I Answer?: Uses crowdsourcing - users mark spam numbers, which are then blocked from everyone.

Important point: when installing third-party applications to block calls, you need to disable the built-in spam filter MIUI, You can do this in: Settings → spamming → Turn off call filtering

For the POCO F5 and Redmi K60 models with MIUI 14, there is a feature: some applications (for example, Truecaller) may not display notifications about blocked calls correctly. To fix this, you need to manually give the application permission to display over other windows: Settings → Special features → Applications on top of other windows

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If you stop receiving missed calls after installing a third-party blocker, check the battery optimization settings for this application. MIUI by default limits the background activity of all applications except system ones.

5. Regional features: why is spam not blocked?

Xiaomi users in Russia, Ukraine, Kazakhstan and Belarus often face a problem when the built-in spam filter is ineffective, due to regional restrictions of MIUI.

The fact is that global firmware (MIUI Global) uses a cloud-based spam database that is updated in real time, but in some regions (e.g. Russia) this feature is disabled for legal reasons, to circumvent this restriction:

1. Install MIUI EU (unofficial European firmware) or switch to MIUI China (requires Chinese knowledge or a patch for multilingualism).
2. Use a VPN to connect to Xiaomi servers in Europe or Singapore, which will allow your device to receive up-to-date spam data.
3. Manually update the spam database via Settings → Spam → Update the database (only works on firmware with support for cloud synchronization).

For users of the Redmi 10C and POCO M4 Pro, there is another problem: these models have disabled the geolocation lock function due to the hardware limitations of the Helio G88 processor, in which case only installing a third-party blocker with support for manual addition of regions will help.

⚠️ Note: When using informal firmware (MIUI EU, xiaomi.eu) Cloud-based spam blocking function may not work smoothly due to lack of official support.Before installing, back up via Settings → Additionally. → Backup and reset.

6 Automation: How to Block Spam Without Your Participation

One of the most powerful features of MIUI is the ability to create automatic lock rules using the built-in Automation tool (available in Settings → Additional).

Example of automatic rule:

If the incoming call from a number that is not in the contacts and the duration of previous calls from this number is less than 5 seconds, block and add to the blacklist.

To create this rule,

1. Go to Settings → Additional → Automation
2. Click "Create a rule" → "If"
3. Select the condition "Incoming call" → "Not in contacts"
4. Add the second condition: "Duration of previous calls < 5 seconds"
5. In the "To" section, select "Block the number" and "Add to the blacklist"

For advanced users, customization is available via Tasker or MacroDroid, which allows you to create complex scenarios, such as:

• Block all calls from 22:00 to 8:00, except for the numbers from the white list
• Automatically respond and put the phone on numbers with suspicious prefixes
• Send SMS asking to introduce yourself to unfamiliar numbers before connecting

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The automatic rules in MIUI work even when the phone is locked, unlike most third-party apps that require constant activity in the background.

7.Efficiency Check: How do you know how much spam is being blocked?

Many users turn on the spam filter and forget about it, not knowing how effective it is. MIUI has hidden statistics that show detailed information about blocked calls.

To watch it:

1. Open the phone application
2. Click on three dots in the top right corner → “Spam statistics”
3. Here you will see the charts by day, the most active spam numbers and the types of blockings (by database, behavior, manually).

If statistics show that less than 30% of spam calls are blocked, then your settings are suboptimal.

• Increase the filtering level to "Aggressive"
• Manually Add Spam Region Prefixes
• Update your spam database (if available in your area)

Extended analytics with data export capability is available for Xiaomi 13 and Xiaomi 14 models, which allows you to track the dynamics of spam attacks and adjust settings. To enable exports: Settings → Spam → Statistics → Data Export

⚠️ Note: If you see legitimate numbers blocked in statistics (e.g. from banks), whitelist their prefixes via Settings. → spamming → Exceptions. For example, for Sberbank, this is +7900, for Tinkoff — +7565.

FAQ: Frequent questions about blocking spam on Xiaomi