Spam calls on Xiaomi smartphones have become a disaster: scammers, intrusive operators and robots attack users several times a day. Even owners of the new Redmi 13 or POCO F6 models are not insured - spammers bypass standard locks, masquerading as official bank and government numbers. In this article, we will analyze all available methods of protection, including hidden MIUI settings, which are not documented in official instructions.
Compounding the problem, spammers are constantly adapting, using spoofing, short codes, and even instant messenger calls. The standard blacklist at Xiaomi is powerless. We tested 5 methods, from basic to advanced, and identified those that are guaranteed to reduce spam by 90%.
1. Built-in tools MIUI: What's really working?
Xiaomi has integrated several layers of spam protection into MIUI, but most users use them inefficiently.
- 🔍 Operator Call Filter: Works at Level SIM-It blocks known fraudulent numbers before it even gets to the phone. → SIM-maps and mobile networks → Call settings → Spam filter.
- 📵 Blacklist. MIUI: allows you to block not only numbers, but also prefixes (for example, all numbers with the number of the number of the +375 or 8-9xx). Available on the phone. → ⋮ → Settings → Blacklist.
- 🤖 AI Call Analysis: In the latest versions MIUI 14/15 Added voice recognition to the phone. → ⋮ → Settings → Spam recognition.
The most effective of these is the operator's filter, because it blocks calls at the network level, but it has a limitation: it only works with Russian customers. SIM-Maps (MTS, Beeline, MegaFon, Tele2). For other countries, you will have to rely on a built-in blacklist or third-party applications.
⚠️ Note: If important calls (e.g. from a bank) have stopped coming after activating the operator's filter, check the settings in the mobile operator's personal account. Some services require permission to outgoing calls for proper operation.
2.Setting up "Deep Protection" in the Security App
The Security app in MIUI contains a hidden anti-spam module that many users don't notice, to activate it:
- Open Security (the shield icon on the desktop).
- Go to the Privacy Protection section → Protection against spam.
- Activate the switches: 🛡️ Blocking fraudulent calls (using Xiaomi database). 📞 Filtering of unknown numbers (hiding calls from unidentified numbers). 🔄 Update your spam database (it’s important to include once a week).
The feature of this module is that it analyzes not only incoming calls, but also SMS, which allows you to block spam in a complex way, for example, if a scammer sends an SMS first and then calls, the system recognizes the connection between these actions and blocks both channels.
☑️ Checking the Security App settings
Xiaomi models based on MIUI 14+ have a feature called Voice Analysis, which recognizes robots by pauses in speech and unnatural intonation. This option is hidden in Settings → Additional → Experimental functions and requires manual activation.
3 Third-party apps: what to choose in 2026
If embedded tools MIUI They can't do it, they'll have to install third-party software. 7 popular applications and selected the top-3, non-contradictory MIUI And they don't discharge the battery:
| Annex | Efficiency | Features | Cons |
|---|---|---|---|
| Truecaller | 92% | 300 million numbers, real-time spam recognition, MIUI integration. | Registration is required, and sometimes it blocks legitimate calls. |
| GetContact | 88% | Shows the names of subscribers, even if they are not in contacts, blocking by category. | Advertising in the free version, a high load on RAM. |
| Hiya | 85% | Minimalist interface, geolocation lock, no advertising. | Fewer Russian-language numbers in the database, premium features. |
For Xiaomi, Truecaller is the best choice, as it officially cooperates with MIUI and can replace the standard Phone app.
- Register (required for the database).
- In Truecaller settings, activate the Replacement of the standard phone.
- In Settings → Block, select the filtering levels: Spam, Fraud, Robots.
- Enable Cloud Lock to sync with servers.
⚠️ Note: When using Truecaller on POCO F5 or Redmi Note 12 may conflict with the system application "Phone". To avoid this, before installing Truecaller, reset the settings of the application "Phone" in Settings. → Annexes → Application management → Phone. → Warehouse → Drop it.
4. Hidden MIUI settings: how to block spam at the system level
MIUI contains several undocumented anti-spam features that can be activated through developer mode or hidden menus, and these methods are suitable for advanced users, as they require manual intervention.
Method 1: Prefix blocking via ADB
If spam comes from specific country or region codes (e.g. +375 for Belarus or +7-9xx for Russia), they can be blocked globally.
adb shell settings put global block_unknown_callers 1
adb shell settings put global blocked_number_prefixes"+375,+7926,+7985"Once these commands are executed, all calls from the prefixes will be automatically reset. To return everything back, use:
adb shell settings put global block_unknown_callers 0
adb shell settings delete global blocked_number_prefixesMethod 2: Disable notifications about missed spam calls
By default, MIUI displays notifications for blocked calls, which annoys many users.
- Go to Settings → Notifications and Status bar → Notification management.
- Find the Phone app and disable the Missed Calls category.
- To completely hide spam, activate Settings → Privacy → Special Permissions → Notifications → Phone → Disable.
Another common problem is the conflict between several anti-spam apps, where if you installed both Truecaller and GetContact, they can block each other, leave only one solution and disable duplicate features in MIUI Security.
💡
The most effective strategy is a combination of built-in filter MIUI + one third-party application (e.g. Truecaller) + Manually blocking suspicious prefixes ADB. This approach closes 95% of spam attacks.