The phone spam spectacle has become a global issue affecting millions of smartphone users around the world. Xiaomi device owners face intrusive calls from collectors, ad robots and scammers every day, which is not only annoying but also disrupting concentration at an important moment. Fortunately, MIUI offers powerful built-in tools to filter incoming traffic that often go unappreciated.
Modern technology not only allows you to reject specific numbers, but also to block entire categories of subscribers who hide their ID. In this guide, we will discuss in detail how to set up a blacklist, activate smart filters and use third-party solutions for maximum protection.
Before we get into the technical details, it’s worth noting that locking methods may vary slightly depending on the Android version and the HyperOS shell. However, the logic of the system remains the same, and you can easily find the necessary options on the menu.
Use of the built-in Security application
The first and most reliable tool to combat unwanted calls is the standard Security app preinstalled on each Xiaomi device.This system module is integrated deeper than regular calls and has access to spam databases at the core level. To get started, you need to run the application and find the Antispam section, which is usually located in the bottom menu or in the toolbox.
Inside the Antispam section, you'll find an interface with lock settings, where you can activate the Block Unknown Numbers Toggle, which automatically rejects calls from hidden identifiers, and you can also set up a filter for numbers that are not saved in contacts, which is especially important for those who only expect calls from friends.
It's important to set up the response scenarios correctly to a blocked call. The system can simply drop a call, send a busy phone, or even simulate a phone turned off. Choose Send a signal busy so that the robot callers tag your number as inactive.
☑️ Setting up anti-terror
Set up a blacklist through a standard call
If you prefer not to use the heavy-duty security app, the basic filtering functions are available right in the dialing interface. The standard MIUI call has a hidden settings menu accessible via the menu button or three dots in the corner of the screen. Going to Settings → Lock, you will get access to a simplified but functional contact management menu.
You can manually add a specific number to the Blacklist, which is convenient if you're concerned about a specific person or organization whose number has already been determined, just copy the number from the call log and add it to the list of prohibited, and the system will immediately block any attempts to communicate from that address.
⚠️ Warning: When you blacklist a number through a call, make sure you don't block a random number that can belong to the courier service or doctor.Always double-check the numbers before confirming the action.
The special attention should be paid to the function of Block hidden numbers in the same menu, which, unlike antivirus databases, works at the protocol level, cutting off calls where the Caller ID field is empty, and this is the most effective way to deal with telebots that hide their identity.
What happens to the blocked?
Filtering calls from unknown and foreign numbers
Modern versions of Xiaomi shells allow for a more flexible filtering policy. You can set your smartphone to only let calls from contacts in your phone book, ignoring everyone else. This feature is often called Quiet Mode or Do Not Disturb with Exceptions, but in the context of calls it works like a hard filter.
To activate, go to the sound or special settings and find the call management section. Here you can activate the Block All Unknowns option. Once this function is enabled, the phone will only call when the caller is in your contacts. All other calls will silently decline.
This method is ideal for people who want complete silence and are willing to miss an important call from a new client or doctor unless they have previously exchanged contacts.
| Type of filtration | Effectiveness against robots | Risk of missing an important call | Difficulty setting up |
|---|---|---|---|
| Blacklist (manually) | Low. | Low. | Low. |
| Blocking hidden | Medium | Medium. | Low. |
| Only contacts. | Tall. | High-pitched | Medium |
| Antispam (databases) | Tall. | Low. | Low. |
Use of Google Assistant and Screen Filters
Global firmware and devices with Google services installed have Call Screen, which is best known on the Pixel, but some filtering features are also available on other Android smartphones via Google’s Phone app, which can automatically detect spam and flag such calls in red.
To activate, open the Phone app, click three dots and select Settings → Caller ID Assent and spam. Enable the option to Filter Spam Calls. The phone will use Google's cloud databases to identify known scammers and automatically block or flag them as dangerous.
You can also enable Automatic Response for Unknown Numbers, and the phone picks up the phone itself, and the robot will ask the caller to introduce itself, and if it's a human, you'll see the transcription of the caller's speech on the screen and decide whether to take the call.
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Use Do Not Disturb mode with Repeat Calls setting, which will block everyone, but if the same number rings twice within 3 minutes (an emergency), the phone will ring.
Third-party applications for enhanced protection
If you don't have enough MIUI built-in tools, the market offers specialized applications like Truecaller, GetContact or Yandex, which have huge crowdsourcing databases that users update in real time, and they know about new fraud numbers faster than any static filters.
Once you install this app, you're going to have to give it the rights to manage your calls and contacts, and then it's going to take over the number detector and blocker function, and you can see other people calling it, like "Delivery Courier" or "Intrusive Survey."
⚠️ Note: By installing third-party number detectors, you agree to transfer part of your phone book to the developer server.If the privacy of your contacts is critical, carefully review the application's privacy policy or use only the built-in tools of Xiaomi.
For maximum efficiency, combine methods: leave the Xiaomi system filter for hidden numbers on, and use the third-party application as a database for identifying names.
Lockdown SMS-Spam from unknown senders
The problem is not limited to voice calls; SMS-Spam is also a big problem. Xiaomi Messages also has a built-in filter. Go to your message settings and find Spam Protection. Enable it and add known short numbers of banks or delivery services to the exceptions if you need them.
The system allows you to create smart rules, for example, you can set up a lock on all messages containing certain keywords, such as "winning", "credit" or "card", which effectively sifts out most of the advertising junk, even if it comes from different long numbers.
Check the Spam folder in the messaging app regularly, and sometimes important confirmation or notification codes from government agencies that the system has mistakenly classified as junk can be found there, and periodic checks will prevent the loss of important information.
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A comprehensive approach combining Xiaomi system filters, Google databases and the careful use of third-party applications gives the best result in the fight against spam.