How to block all incoming calls to Xiaomi: Effective methods

In today’s digital world, the smartphone has become an integral part of life, but sometimes the need for silence becomes critical. Owners of Redmi, Poco and Xiaomi devices often face intrusive spam, calls from collectors or simply a desire to take a break from communication. Standard settings allow you to manage contacts flexibly, but not all users are aware of the hidden functions and intricacies of the MIUI or HyperOS interface.

There are many scenarios where you need to immediately shut down your voice, whether it's an important meeting, a time to sleep, or just having to focus on your work without distractions, and unlike a simple reset, a full lockdown requires a smart approach to keep the really important notifications from your loved ones from being missed while remaining inaccessible to the rest of the world.

In this guide, we’ll look at all the ways you can limit incoming traffic, from basic system settings to advanced methods through an engineering menu. You’ll learn how to effectively use built-in spam protection tools that users often ignore, and how to set up automatic lock scenarios. The right phone configuration will allow you to have full control over who can contact you and when.

Using a built-in blacklist and anti-terror

The first and most obvious step is to activate the built-in filtering mechanisms that are preinstalled in the shell of MIUI. Xiaomi Security has a powerful module "Anti-terror", which allows you not only to block specific numbers, but also to hide calls from unknown subscribers. To access these settings, you need to open the application "Security" and go to the lock section.

Inside the lock settings menu, you'll find options to manage the blacklist, you can manually add numbers you want to ignore or import them from your call history, but to completely block all incoming calls, there's a more radical method, which is to set a "Block All" rule, which will turn your phone into an impregnable fortress for voice communication.

⚠️ Note: When activating lock mode of all numbers, you can skip the emergency call. Make sure that callers have an alternative way to contact you in case of an emergency.

Setting up filtering rules allows you to create a flexible security system, such as blocking hidden numbers or codes of certain regions, the system will automatically reset such calls, and the caller will hear a "busy" signal or short horns, depending on the operator's settings, which is an effective way to clear the silence without having to turn off the device.

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Use Do Not Disturb mode in conjunction with the blacklist to allow calls only from contacts from the Favorites, completely ignoring the others.

Flight mode and network module management

The fastest way to shut down all incoming connections is to activate flight mode, which forcibly shuts down all wireless communication modules, including cellular, Wi-Fi and Bluetooth, and as a result, the phone physically loses communication with the operator's base stations, and no call can reach you.

But with modern versions of Android and Xiaomi shells, you can fine-tune this mode, you can activate Flight Mode and then manually turn on Wi-Fi. In this state, voice communication via the SIM card will not be available, but you can use instant messengers and the Internet, which is the perfect compromise for those who need the Internet, but do not need voice calls.

To activate the swipe flight mode, tap the notification curtain down and click on the aircraft icon. If you need more detailed control, go to Settings → Connections and Sharing → Flight Mode. Here you can see the connection status and make sure the network is truly off. Complete network isolation ensures no interruptions.

This can be perceived as ignoring, so use this method carefully. In some cases, it is more advisable to use the redirection, which will be discussed below, to redirect calls to voicemail or another number.

Configure Unconditional Call Redirection

Redirection is a network function that allows you to redirect an incoming call to another number or to an operator's voicemail service. Conditional redirect only works when you don't pick up the phone, but we're interested in an unconditional one that works instantly with any incoming call, which allows you to formally accept the call, but not actually disturb the owner of the phone.

To set up this feature on Xiaomi, open the Phone app, click on three dots in the corner and select Settings. Next, go to Accounts for Calls, select the one you want. SIM-You can find the map and find the "Redirect" item, and the system will request the verification code from the operator, and then the settings menu will open.

Select the option "Always forward" and enter the number to which the calls will go. This can be a voicemail number (usually a special service number of the operator) or any other phone, after confirming the setting, all incoming will leave at the specified address, and nothing will pop up on your screen.

To cancel a redirect, go back to the same menu and select "Disable." Note that some carriers may charge for using a redirect or minutes before the call is redirected. Check your carrier's tariff plan to avoid unexpected costs.

Application of the “Do Not Disturb” regime

Do Not Disturb (DND) mode is a softer alternative to full locking.It doesn't break the network connection, but it suppresses audio and vibration signals, and it can also block the call entry itself. Unlike flight mode, the phone stays online, and you can set exceptions for important contacts.

In MIUI settings, this mode has advanced functionality. Go to Settings → Sound and vibration → Do not disturb. Here you can set a schedule, for example, automatically turn on the mode from 23:00 to 07:00. This eliminates the need to turn on the lock every night.

A key feature is setting exceptions: You can allow calls from contacts marked as "Favorites" or repeated calls (if the same number rings a second time within 3 minutes, the system will consider it an urgent matter), which allows you to filter the noise, leaving the channel open for critical situations.

When Do Not Disturb is activated, the caller can hear the usual horns, but your phone will be silent and the screen will not light up. In call history, the missed call will appear, but without an audible notification, which is ideal for a movie theater or meeting where vibration is also unacceptable.

Third-party applications to block spam

If there's not enough built-in tools, Google Play apps come to the rescue, programs like Truecaller, Calls Blacklist, or Should I Answer? have huge spam bases and can create complex filtering rules, and they can block masked numbers, a region, or even a country.

Installing such an app requires broad permissions to access your phone and contacts, which is necessary for real-time incoming traffic analysis. Once installed, you can turn on Lock All mode, leaving only trusted contacts on the whitelist, and these applications often update the fraudsters' databases, which improves security efficiency.

However, using third-party software has its own risks: transferring call data to third-party servers can raise privacy issues, and aggressively running such applications in the background can consume more power. Choose proven solutions with high ratings and a lot of feedback.

⚠️ Warning: When installing blocking apps, read permissions carefully. Do not give access to the microphone or SMS, If not required for the main call blocking function.

Some apps allow you to create scripts, such as blocking all calls except those that come during business hours, or vice versa. The flexibility of settings in third-party software often exceeds the capabilities of a standard Xiaomi call, making them a great addition for those who suffer from persistent phone terrorism.

Locking through USSD-codes and engineering menus

For advanced users, there is the ability to manage calls directly through operator codes or Android engineering menus. USSD-The codes allow you to quickly activate or deactivate the locking services provided by the carrier, and these codes are universal and work on any phone, including Xiaomi.

The most common codes for managing forwarding and locking are:

• 📞 ##002# – Cancels all types of redirects (returns default settings).
• 🚫 **21*number# – Sets an unconditional redirect to the specified number.
• 🔒 *33*code# – Blocks outgoing calls (the default code is often 0000).
• ✅ #33*code# - Unlocks outgoing calls.

The engineering menu (#4636##) provides access to the radio module's settings. Although it is difficult to block all calls directly there without risking network disruption, you can change your preferred network type. For example, switching to LTE Only or 3G Only on some older networks may make it impossible to receive voice calls (unless VoLTE is configured), but this method is unstable and depends on the operator.

Use of the USSD-Codes are a quick way to change the status of a line, and if you need to be inaccessible immediately, the activation code for a forwarding to a non-existent number or voicemail will work more effectively than any application. This action takes place on the network side, so even a dead phone (while it still catches the network) will not disturb calls.

Comparison of methods and final recommendations

The choice of blocking method depends on your ultimate goal: If you just need to get enough sleep, do not disturb mode is enough. If you need complete isolation for several hours, flight mode is necessary. For constant fight against spam, a blacklist in combination with applications is better. Each method has its advantages and disadvantages, which are worth considering.

Flight mode guarantees 100% silence, but cuts you off from the internet (unless you turn on Wi-Fi manually). The blacklist is effective against known numbers but powerless against new spammer numbers. Redirecting is convenient but can cost money. Combining these methods gives the best result.

Xiaomi owners also have a Pocket Mode feature in call settings that prevents random responses but doesn't block incoming ones. Don't confuse it with real locking. The key is to understand the difference between software ignoring a call and physically breaking a network connection.

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The optimal defense strategy is a combination of a built-in blacklist for known spammers and a Do Not Disturb mode with exceptions for important contacts the rest of the time.

In conclusion, incoming traffic management on Xiaomi provides a lot of options. Using the tools described above, you can set your phone to serve you rather than distract you from life. Check lock settings regularly, especially after you update the system, as menu layouts may change in new versions of MIUI and HyperOS.