Xiaomi and Redmi have powerful security systems that allow you to effectively filter incoming calls. With spam calls and offers from telemarketers increasing every day, the access restriction function becomes critical, and the user can configure the device so that it will respond exclusively to numbers stored in the phone book.
This setup is especially relevant for those who want to keep quiet after hours or protect older relatives from scammers. The standard MIUI interface provides flexible tools to manage incoming traffic without installing third-party apps. Understanding the principles of the call blocker will help you regain control of your device.
In this article, we will take a closer look at how to activate Contact Only mode and what nuances exist in different versions of firmware. You will learn how to create whitelists, configure exceptions and use additional security features. A competent phone configuration will turn it into a reliable shield against unwanted intrusion into your personal space.
Why limit incoming calls to Xiaomi
The main reason Android device owners look for filtering is intrusive spam. Number databases often fall into the hands of advertising agencies, resulting in dozens of useless calls a day. The restriction feature allows you to ignore all numbers that are not on your contact list, eliminating the need to reset a call every time.
It's also a powerful tool for creating a do not disturb mode with selective action, so if you're in an important meeting or relaxing with your family, the phone will only miss really important calls from loved ones, and the rest of the callers will hear the busy signal or be redirected to your answering machine without even disturbing you.
⚠️ Note: When hard filtering is enabled, you may miss emergency calls from delivery services, couriers or doctors if their numbers are not recorded in your phone book.
Another aspect is fraud protection, where attackers often use swapping numbers or new SIM cards, and if a person is not saved in your notebook, their call will be automatically blocked by MIUI security, which reduces the risk of being baited by phone scammers, who often act quickly and aggressively.
Use of the built-in MIUI blocker
The MIUI shell and its modern version of HyperOS already have a powerful security module pre-installed, it does not require downloading additional programs from Google Play. To access the settings, you need to open the standard Security application, which has a green shield icon, and inside this application is the Blocker section, responsible for filtering calls and SMS.
The interface of the blocker may vary slightly depending on the regional version of the firmware (Global, China, EEA). However, the logic remains the same: the system checks the incoming number against the database and your personal settings. If the number is marked as spam or is not on the list of allowed, the call is interrupted at the system level.
To activate the Contacts Only mode, you need to go to the blocker settings, and you'll find the "Block Rules" or "Black List," and that's where the filter mode switches from simply ignoring specific numbers to global banning all unknowns.
☑️ Blocker setup
Step-by-step: Enabling the “Contact Only” mode
The setup process may seem confusing due to the abundance of menus, but if you follow the algorithm, it will take no more than two minutes. First, open the Security app on the home screen. Find the Blocker icon (usually at the bottom of the screen or in the Tools folder).
After opening the blocker menu, look at the gear icon in the top right corner of the screen, and clicking on it will open the blocker settings section. Here we are interested in "Inbox Locking." In some versions of the firmware, it may be called "Call Lock Rules."
In the list that opens, select the option to Lock all numbers or Block unknown numbers. The system will warn you that calls will be rejected. Confirm action. Now the phone will only accept calls from those who are in your address book.
⚠️ Warning: Make sure that important numbers (work, school, emergency services) are stored in your phone’s memory beforehand, otherwise you will be left without communication with them.
If you want to make an exception for some unknown numbers, you can use the Whitelist function. Add the necessary numbers manually. It is also worth checking the Do Not Disturb settings, as it may take precedence over the locker settings.
What to do if the blocker menu is empty?
Set up exceptions and whitelist
Strict filtering is convenient, but life makes adjustments, sometimes you need to take a call from a courier or a new customer whose number is not yet on your phone, and Xiaomi has an exception mechanism that allows you to flexibly manage access.
You can set up an automatic re-call. The logic is that if the same unknown number calls you a second time in a short time (e.g., 3-5 minutes), the system will see this as urgency and miss the call. This feature is often enabled by default, but its status is worth checking in the locker settings.
There is also the possibility of creating a separate list of authorized contacts that can be reached even in "True Peace" mode, which is relevant for family situations or work in the duty services, to add contact to this list:
- 📞 Open the Contacts app and select the right person.
- ⚙️ Click on a menu item or three dots, select Add to a blacklist (paradoxically, but in some versions). MIUI Exception management goes through this point where you can select "Always skip").
- ✅ Alternative path: in the settings of the blocker, find the item "White list" and add the number manually.
It's important to understand the difference between a blacklist and a whitelist, because a blacklist blocks specific subscribers, and a white list allows specific subscribers to bypass global bans, and in this case, when you have all the unknowns blocked, the whitelist becomes the main tool for admission.
| Type of list | Principle of action | Priority | What to use for |
|---|---|---|---|
| Blacklist | Blocks selected numbers | High-pitched | For specific spammers |
| Whitelist | Allows selected numbers | Maximum | For important contacts |
| Only contacts. | Blocks everything except the book. | Global | For complete silence |
| Repeated call | Misses on the 2nd call. | Medium. | For emergencies |
💡
Use prefixes in contact names (e.g., Work Ivan) to quickly filter them into the shared list and easily manage access groups.
Alternative methods of filtering calls
The built-in MIUI is good, but not always perfect. If a standard blocker seems inconvenient or not functional enough, you can resort to third-party solutions. Google constantly updates its services, and the Google Phone app (which is often the default on global versions of Redmi) has excellent built-in spam protection.
In the Google Phone app, go to the settings (three dots in the corner) → “Spam and Caller ID Protection.” By activating this feature, you will access Google’s huge spam database.
Another method is to use the phone's modes of operation, and the notification curtain (quick access panel) often has a "Do Not Disturb" button, and if you set it up correctly, you can achieve the same effect: the phone will be silent, only select contacts will be missed.
- 🌙 Click the Do Not Disturb mode icon in the curtain.
- 👥 Select "People" or "Calls".
- ✅ Check the box "Contacts Only" or "Favorites".
This is a good way to keep it temporary: you can turn it on overnight or during a meeting, and then turn it off, returning the phone to normal mode, a more flexible approach than global locking through security settings.
Addressing issues and issues
Xiaomi and Redmi users sometimes experience a situation where settings are confused or the lock is not working properly, most often the problem lies in access rights or a conflict of application versions. If you have enabled the lock, but the phone continues to ring, check if the contact has a special tune that can interrupt the system settings.
Also, you should consider the work of third-party messengers. Blocking through the system blocker only acts on ordinary cellular calls (GSM/VoLTE). Calls via WhatsApp, Telegram or Viber are governed by the settings inside these apps. You will have to go to the privacy settings of each messenger separately and there limit the number of people who can call you.
⚠️ Note: System lock does not apply to Internet calls. Set up privacy on WhatsApp and Telegram separately, otherwise spammers will use instant messengers. In some cases, after updating the firmware, the blocker settings can be reset to factory ones. It is recommended to periodically check the filter status, especially after major Android or other updates. MIUI. 💡System lock only works for cellular communication; for messengers (WhatsApp, Telegram) privacy settings need to be changed separately within each application. Why does the caller hear the beeps, although it is worth blocking? If the caller hears a long beep instead of a busy or reset signal, it means the call is blocked at your phone level, but the carrier has not yet broken the connection. To change the response (e.g. to "busy" or message), you need to use operator services or special forwarding codes if they are supported by your SIM-How do I unlock a number if I accidentally block an important client" →"Locker" →"Blacklist (or Blocked) Find a number on the list, click on it and select Unblock or delete from the list. After that, calls from that number will again pass. Does the blocking affect the arrival of SMS from banks? Regular SMS messages from banks (short numbers) often pass through filters, as they are not personal contacts. However, if you have enabled blocking of all unknowns, there is a risk of losing the confirmation codes. There is a separate SMS switch in the MIUI blocker settings – make sure that message blocking is disabled or set less strictly than call blocking.