Owners of Xiaomi, Redmi and Poco smartphones often face a situation where the device stops responding to incoming calls. The screen may not light up, or the subscriber hears the beeps, but the call does not arrive. This problem can be caused by software failures of the MIUI shell, Do Not Disturb settings, or an activated list of prohibited numbers.
When an incoming call is blocked by the system without the user's knowledge, it requires careful analysis of security settings. In most cases, the cause is not hardware failure, but malfunctioning of the software. Recovery is possible through resetting parameters or manual adjustment of the configuration.
In this article, we will take a closer look at all the possible causes of blocking and offer step-by-step solutions: you will learn how to manage call filters, disable hidden modes, and use the engineering menu for diagnostics.
Diagnostics of incoming call problems
The first step is always to make sure that you're getting a precise diagnosis, and you need to know if all calls are blocked or only from certain contacts, and if the problem is selective, you're likely to have a blacklist or a Do Not Disturb mode with exceptions.
If the phone cannot be picked up from anyone, including the phone book, the status should be checked. SIM-Sometimes a login failure on the operator's network simulates a software lock, make sure the status bar displays the network signal and there is no crossed-out SIM icon.
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If calls are not coming from hidden numbers only, check the anti-spam filter settings in the Security app, as it can aggressively block unknown contacts.
Notice how the screen behaves during the incoming signal. If the sound is coming but the interface is not appearing, the problem may be the rights to display over other windows. This is a common error after Android updates.
Setting up the “Do Not Disturb” mode and blocking
The most common reason incoming calls are blocked at the interface level is the active Do Not Disturb mode, which has advanced settings in the MIUI shell that can be automatically enabled on a schedule or under certain conditions.
To check, go to Settings → Sound and Vibration → Do Not Disturb. Here you need to make sure the activation switch is off. If you need the mode for other purposes, check the Exceptions section.
- 📞 Make sure that the exceptions are “All Contacts” or “Favorites” if you want to hear calls from them.
- 🔇 Check your repeat call settings: Often a second call from the same subscriber passes, even if the mode is active.
- 🌙 Turn off automatic on schedule if it conflicts with your current time.
It's also worth checking "Flight Mode." Sometimes the system sticks in this state, formally displaying a shutdown, but actually locking the radio module. Turn on and off this mode again through the notification curtain.
Managing Spam Blacklist and Filters
Xiaomi's built-in spam protection tools can be too aggressive.The Security app has its own locking module that works independently of the standard phone book.This is often where the reason why you don't hear the beeps is hidden.
Open the Security → Antispam → Blacklist. This shows all the numbers that are not available to your phone, you can delete specific records or clear the list completely.
☑️ Checking the anti-spam settings
Pay special attention to filtering settings. The system can block calls from hidden numbers or numbers from other countries. If you are expecting an important call from abroad, make sure that the international lock is disabled.
⚠️ Warning: When clearing the blacklist, be careful, removing all records can return access to unwanted subscribers whose numbers you previously entered knowingly.
Resetting call and application settings
If the software settings are off, it helps to reset the cache and the phone app data, and it won't delete your call history or contacts, but it will return the call settings to factory settings, and it's an effective way to unlock the interface functionality.
Follow these steps: Go to Settings → Apps → All apps. Find the list “Phone” (or “Calls”). Click on “Memory” and select “Clear” (or “Reset Settings”).
After this procedure, it is recommended to restart the device, restart is necessary in order for the system services to re-register in the operator's network and apply the updated configuration files.
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Resetting the phone application data is a secure procedure and does not result in the loss of personal contacts or call history stored in the cloud or on the Internet. SIM-map.
In some cases, you may need to reset all network settings, which will return the settings of Wi-Fi, Bluetooth and mobile networks to their original state. Path to option: Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth.
Using the Engineering Menu to Unlock
For a deeper diagnosis, you can use a hidden engineering menu that allows you to check the redirect and lock status at the modem level, which is true if standard methods have not worked.
Open the Phone app and dial the combination ##4636##. From the menu that opens, select Phone Information. Here you can see the network status and try to switch your preferred network type (e.g., from LTE to GSM) to trigger re-registration.
| Parameter | Description | Recommended value |
|---|---|---|
| Set Preferred Network Type | Type of network | LTE/TD-SCDMA/GSM |
| Mobile Radio Power | Radio power | Included. |
| Cell Info Refresh Rate | Frequency of update | By default. |
You can also check through the engineering menu whether forced forwarding of all calls to another number or voicemail is activated, which creates the illusion of blocking.
What to do if the engineering menu is not opened?
Problems with the screen and proximity sensor
Sometimes the user can't answer the call, not because the network is locked, but because the screen doesn't respond to touches during the call, a common problem with the proximity sensor, which mistakenly believes that the phone is near the ear.
Check for a protective film or glass. If they cover the top of the display, the sensor will not work properly, and it is also worth cleaning the screen, as contamination can cause phantom presses or locks.
In the screen lock and password settings, you can try to turn off the “Mode in your pocket” feature.This mode is designed to prevent accidental clicks, but on Xiaomi it often works too sensitively and blocks the call interface.
⚠️ Note: If the screen goes out immediately after you put the phone to your face, but does not turn on when you move away, you may need to calibrate the proximity sensor through an engineering menu or service center.