How to disable the call blocking on Android Xiaomi

Xiaomi and Redmi smartphone owners often face a situation where an important call does not arrive, and the subscriber hears short beeps or a message about the busy line.This can occur due to the activated Do Not Disturb feature, the settings of the built-in antivirus or errors in the work. SIM-Understanding how to disable the Xiaomi Android call lock is critical to restoring normal communication.

MIUI has advanced traffic filtering capabilities that can be too aggressive by default. A user can accidentally blacklist a number or activate silence mode without forgetting it. In this guide, we will detail all the software layers of protection that can prevent incoming calls.

External factors such as operator services or physical wear and tear should not be excluded. SIM-Before you bring the device to the service, you need to conduct a complete diagnostic of the software settings.

⚠️ Before making massive changes to system communication settings, it is recommended to save important contacts to cloud storage or on the Internet. SIM-map to avoid accidental loss when resetting parameters.

Checking the “Do Not Disturb” and blocking

The first and most obvious step is to check the status of Do Not Disturb mode, which hides exception settings that can block calls even from selected contacts. Go to Settings → Sound and Vibration → Do Not Disturb.

If you want to look at the "Block Calls" item, if it's "All," it won't ring under any circumstances, and the best choice is to set "Favorites Only" or turn off the filtering in this menu completely.

• 📱 Open the sound settings and check the active silence schedules.
• 🔇 Make sure the “Do Not Disturb” slider in the notification curtain is off.
• 📞 Check the exception list for repeated calls.

Often users forget that the mode can be activated automatically on a schedule, for example, at night. Check the "Planned" tab and make sure that the current time does not fall into the lock interval. If the problem persists, move to a deeper system setup.

Set up an integrated antivirus and

In the MIUI shell, the Security and Filtering system app is responsible for security and filtration, and that's where the so-called (blacklist) is located, which can be aggressive, open the Security app and select the Lock section.

Inside the lock menu, you need to check the three main tabs: Blacklist, Whitelist, and Settings. The blacklist can be numbers that are manually locked or automatically locked as spam. If you see a contact you want, delete it from there.

The way to settings: Security → Antivirus → Settings → Blocking

Special attention should be paid to the function “Block hidden numbers” and “Block foreign numbers”. If you expect calls from unknown identifiers or from abroad, these options must be deactivated, otherwise the system will automatically reset such calls without notice.

Managing Blocker Applications

In addition to system tools, third-party applications for number detection and spam protection, such as GetContact, Yandex or Kaspersky, can be installed on the phone, they take priority over the system call and can intercept call management.

You need to go to the settings of each antivirus or number detector installed. Often after updating, such applications start blocking all unknown numbers by default, it is recommended to temporarily disable the protection or remove the application for verification.

If you are not actively using third-party solutions, it is better to remove them completely. Xiaomi system functionality is usually enough for basic protection, and third-party software often creates conflicts that lead to missed calls.

Settings SIM-maps and networks

Sometimes the problem lies not in the software of the phone, but in the settings of the phone itself. SIM-The carriers offer Blacklist and Anti-Determinator services that are activated at the network level, and in this case, the phone settings will not help.

You need to contact the support of your operator (MTS, Beeline, MegaFon, Tele2) Or check your personal account, make sure the lock service is not activated, and try rearranging it. SIM-card to another slot if there are two, or to another phone.

Resetting network settings often helps eliminate software glitches of the communication module. To do this, go to Settings → Connections and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. This action will not delete your personal data, but return network settings to factory settings.

⚠️ Note: After resetting your network settings, you will need to re-enter passwords from your stored Wi-Fi networks and Bluetooth devices again, so make sure you remember the necessary data.

MIUI specifics and system constraints

MIUI is known for its aggressive work with background processes to save battery life, which can cause the Phone or Contacts app to be killed by the system and the call will not arrive, and you need to set up autostart and work in the background.

Go to Settings → Applications → All apps. Find the Phone (or Calls) and Contacts app. From the Battery Savings menu, select No Limits. Also turn on Auto Start for these system components.

• 🔋 Turn off energy saving for the phone application.
• 🚀 Allow auto-start for system communications services.
• 📲 Check for updates for the Security app».

Some firmware versions have a bug where access permissions are lost after a system update. Check the permissions in the Settings menu → Apps → Permissions → Other permissions. Make sure the caller has access to the microphone, contacts and phone.

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If calls are missing after the MIUI update, try clearing the Phone app cache through the application settings, which often solves the problem of calling service freezing without losing call history.

Radical methods: reset and engineering menu

If the software methods didn't work, you can try resetting your call settings via the engineering menu or a full reset. Enter the code ##4636## in the dialer. In the menu that opens, select Phone Information and check the network status.

A safer option is to reset all settings to factory settings. Before you do that, make sure to back up your data via Mi Cloud or Google account. Go to Settings → About Phone → Reset → Erase all data.

This method is guaranteed to remove any software conflicts, including hidden errors in the system configuration files. Once reset, the phone will be as new, so the problem with blocking calls should disappear unless it is caused by physical damage to the antenna or modem.

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Hard Reset is a last resort that eliminates 99% of MIUI software errors, but requires prior retention of all important user data.