Why Xiaomi Phone Calls Are Not Working: A Complete Discussion of Causes and Solutions

You are trying to call Xiaomi Redmi Note 12 or POCO X5 Pro, but the caller can't hear your call -- or can't take the call at all? -- Phone calls on Xiaomi smartphones are more common than you think, 60 percent of the time are due to software failures, 30 percent to hardware malfunctions, and only 10 percent to carrier errors. But how to accurately diagnose the cause and return to work?

In this article, we will discuss all possible reasons why a call on Xiaomi does not work, from the banal lack of a network to damage to the communication module. IMEI, Reset network settings, bypass operator lock and even restore performance after a failed update MIUI. For owners of older models (Redmi) 4X, Mi A1) We give you some instructions -- their problems are often unique.

Before you take your phone to the service center, go through our checklist, 8 out of 10 times you can recover your call yourself in 10 to 30 minutes, and start with the simplest, and gradually move on to the complex technicalities.

1. Checking the basic settings: SIM-map, flight mode and network

Start with the obvious: perhaps the problem lies not in the phone, but in the settings or the phone. SIM-The first thing you need to do is make sure that you have a map:

• 📱 SIM-card is correctly installed in the tray (on models with a hybrid slot, check whether the second conflict is not the same). SIM memoryily).
• 🌐 In the top panel, the network icon is displayed (if it is not there, the phone does not catch the network at all).
• ✈️ Flight mode is disabled (sometimes it is activated accidentally through the Quick Settings Panel).
• 🔄 Rebooting your phone didn’t help (yes, it’s trivial, but it works 15% of the time).

If there is a network icon but calls don't pass, check the priority of the network. On Xiaomi, it can get lost after updates:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map.
3. Tap the network type and install 4G (preferably)/3G/2G.
4. Activate the Volte option (VoLTE) if available (this improves voice quality).

⚠️ Note: On some models (Redmi) 9A, POCO M3) After resetting the network settings, the VoLTE option may disappear. To return it, update the firmware to the latest version. MIUI.

If after this manipulation, the calls do not work, move to the next section - the problem is deeper than it seems.

2. Failure IMEI: How to check and restore

IMEI — This is your phone's unique identifier that links it to the carrier's network, and if it's downed (for example, after a failed rooting or firmware), the calls will stop working, even though the Internet and the Internet will not work. SMS They can stay active. Xiaomi is downed. IMEI — One of the most common causes of broken calls, especially after updates via Fastboot.

To check. IMEI, type in the phone keyboard:

*#06#

If you see a 15-digit number, Null, 0 or Invalid IMEI, There are two ways to repair it:

Method 1: Menu of Engineering (for the purpose of not-root phone)

1. Open the phone app and dial: ##4636##
2. Go to the phone information.
3. Scroll down to the block. IMEI — If it is empty, try resetting your network settings (see next section).

Method 2: Recovery IMEI through ADB (PC)

This is a method that's suitable for advanced users, and you'll need to:

• 🖥️ A computer with installed Xiaomi drivers and ADB Tools.
• 📋 Original. IMEI (If you lose, look at the box or check).
• 🔌 USB-cable (preferably original).

Instructions:

adb shell


su




setprop ril.radio.imei [Your IMEI]




setprop ril.radio.imei2 [Your IMEI for 2 SIM]




reboot

⚠️ Attention: Incorrect input IMEI This could lead to a phone lock by the operator. If you're not sure, contact the service center.

3. Reset network and APN settings

Incorrect settings APN (access points or network configuration failures can block voice calls even when the Internet is working:

• 🔄 Firmware updates MIUI.
• 📱 Shifts SIM-card-carrier.
• 🛠️ Rooting or modifying system files.

To reset the network settings:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map → Access points (APN).
3. Click on three dots in the upper right corner → Reset to default values.

If it doesn’t work, try manual input. APN. Parameters for popular operators:

After saving the new APN Reboot your phone and check your calls. If there's a problem, move on to the next step.

Make sure you have a backup copy of your current ones on hand. APN (Take a picture of the screen).

Check the balance. SIM-Cards (sometimes operators block services with zero balance).

Turn it off. VPN (It may be in conflict with the mobile network).

Try inserting. SIM-Card to another phone – is there a connection?-->

4. Software glitches: cache, firmware, and application conflicts

If the hardware checks didn't reveal any problems, the software is to blame. On Xiaomi, most calls stop working because of:

• 🗑️ Clogged cache of the communication module (com.android.phone).
• 🔄 Failed update MIUI (especially in beta versions).
• 📱 Conflict with applications to block calls or VPN.

The first thing to do is to clear the cache of system applications:

1. Go to Settings → Applications → Application Management.
2. Find the phone and telephony services.
3. In each of them, click the Warehouse → Clear the cache.

If that doesn’t help, try resetting your phone to factory settings (don’t forget to back up!).

1. Go to Settings → About the phone → Reset settings.
2. Select Reset all settings (does not delete files) or Delete all data (complete reset).
3. After restarting, reset your phone and check the calls.

If the reset didn’t work, the problem could be the firmware. Xiaomi forums often discuss bugs with calls after updates — for example, in the case of the company. MIUI 14 for Redmi Note 11 was a network sign-up glitch.Solution:

• 🔙 Reverse to the previous version MIUI via Fastboot.
• 🔄 Install the latest stable firmware through Recovery.
• 📥 Download the firmware from the official Xiaomi website (choose the Global region or the official Xiaomi website). EEA).

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Before you run through Fastboot, check the bootloader version of your phone. On newer models (Xiaomi 13, Redmi Note 12 Pro)+) It can be blocked and it will take 7-15 days to unlock through the official Mi Unlock tool.

Hardware malfunctions: antenna, communication module, battery

If the software methods don't work, the problem can be in the hardware.

• 📡 Antenna module (especially after falls or moisture infestation).
• 🔋 Contacts SIM-maps (oxidation or mechanical damage).
• 🔌 Communication module (overheated or defective).
• 🔋 Battery (with severe wear may not have enough power for stable network operation).

How to diagnose a hardware malfunction?

1. Check it out. SIM-Tray: Take out the tray and check the contacts for oxidation or contamination.
2. Testing with another SIM-map: Insert the work card SIM If the calls are made, the problem is yours. SIM or operator.
3. Check in the engineering menu: Dial ##4636##, go to Phone Information and see network status. If the service status line says "Disabled or Unregistered" is a sign of a hardware problem.
4. Diagnostics via test menu: Dial ##284## (on some models ##2834##) to test the antenna. If the signal is missing, the antenna or communication module is faulty.

If you suspect damage to the communication module, note additional symptoms:

• 🔥 The phone is very hot in the upper part (where the module is located).
• 📶 The network signal is constantly disappearing and appears.
• 🔋 Fast battery discharge when using the network.

⚠️ Note: On Xiaomi models with a metal body (Mi 8, Mi 9), antenna lines are often damaged when falls. If after the impact the calls stopped working, do not try to disassemble the phone yourself: antennas are soldered to the motherboard, and without soldering equipment they can not be restored.

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If the phone stopped ringing after falling, getting moisture or disassembling itself, it's 90 percent likely that the problem is hardware, and the only solution is to go to the service center.

6. Operator blocking: blacklist, debts, restrictions

Sometimes the problem isn't with the phone, it's with the operator's limitations.

• 🚫 Blocking for non-payment (even with a positive balance, old debts can be valid).
• 📵 Blacklisting (for example, by mistake or after spam complaints).
• 🔒 Restriction of services due to suspected fraud (relevant to new cases) SIM-map).
• 🌍 Roaming restrictions (if you are abroad).

How do you check?

1. Call your operator’s hotline (numbers: 0890 for MTS, 0611 for Beeline, 0500 for MegaFon, 611 for Tele2).
2. Check if there are any locks on your number and ask for a status check on Voice.
3. If you are roaming, check the rates and availability of services in the current country.

If the operator has confirmed the blocking, the solutions can be different:

• 💳 Paying off debt (if any).
• 📄 Provide documents to remove restrictions (for example, passport for identification).
• 🔄 Re-release SIM-Card (sometimes faster than getting a lock on).

On some tariffs (for example, "for laptop" or "Internet only") voice communication can be disabled by default.

7. Features of the old Xiaomi models (Redmi) 4X, Mi A1, Mi 5 and others.)

Owners of older Xiaomi smartphones (released before 2019) often face unique challenges that do not occur on new devices.

• 📵 Problem with Qualcomm communication module: on Redmi 4X, Redmi Note 4 and Mi A1 module often fails WCN3680, Symptoms: the phone doesn't catch the network, but after the restart, it temporarily works.

Solutions for old models:

1. For Redmi. 4X/Note 4 trouble WCN3680: The only reliable way is to replace the communications module, and the temporary solution is to roll back the firmware to the next one. MIUI 9 (wherein the bug was less frequent).

If your model is older than 2017 and stopped calling after the update, try flashing custom firmware (like LineageOS or Pixel Experience). XDA Developers (Please specify the exact phone model).

8.When to contact the service center?

If you have tried all the methods in this article, but the calls still do not work, it is time to contact the professionals.

• 🛠️ The phone is not registered on the network even after resetting and firmware.
• 📡 The engineering menu shows IMEI: Null and it was not possible to restore it on its own.
• 🔥 The phone warms up in the area of the antenna or communication module.
• 💧 There was a swelling of water (even if everything was dry on the outside).
• 🔧 You are not sure about your skills in working with ADB or firmware.

What to do before visiting the service?

1. Back up all data (via Mi Cloud or on your computer).
2. Write it down. IMEI (If it is displayed, and the firmware version.
3. Check whether the warranty is valid (on the official website of Xiaomi by serial number).
4. If the phone was purchased abroad, check if it is supported in your area (some models, such as the Redmi). K50i, Not certified for Russia).

The cost of repairing the communication module in Xiaomi varies from 1,500 to 5,000 rubles depending on the model. Replacing the antenna is cheaper - about 800-2000 rubles. If the phone is warranty, repair should be free (but the warranty is removed when rooting or unofficial firmware).

⚠️ Note: In informal service centers often offer "switch" IMEI" This is illegal and can lead to the locking of the phone by the operator. IMEI Only if you have a check and the original box.

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If the phone stopped ringing after independent firmware or rooting, the official service may be denied warranty repair, in which case look for proven workshops with good reviews.

FAQ: Frequent questions about broken calls on Xiaomi