Mobile Internet does not work on Xiaomi: full instructions for diagnosis and correction

Did you suddenly find that your Xiaomi has stopped working mobile Internet, even though the network indicator shows full signal level? Or, conversely, the network disappears in the most unexpected places where everything used to work steadily? This problem is familiar to many owners of Redmi, POCO and Mi smartphones, from budget models to flagships.

In this article, we’ll look at all possible scenarios why mobile internet might not work on Xiaomi – from configuration errors to the way it works. APN before problems with firmware or SIM-You'll get step-by-step instructions for each situation, including hidden settings that are not covered in the standard manuals. 5G (Xiaomi 13 Pro, Redmi Note 12 Pro+), where problems are often associated with incorrect operation of the module.

If you have already tried to restart your phone or take it out SIM-So, the map -- don't rush to bring the device to the service, and 80 percent of the time, you can solve the problem yourself in 5 to 10 minutes, and let's start with the simplest and gradually move on to the more complex diagnostic steps.

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

The first thing you need to do is make sure that the problem isn't physical. SIM-map:

• 📱 Phone reboot. Sometimes mobile internet failures are caused by temporary errors in the communication module. Just restart the device and check the connection in 1-2 minutes.
• 🔄 Reinstallation SIM-Take the tray out, get it out carefully. SIM-the card, wipe it with a dry cloth (especially the contacts) and paste it back in. Make sure the card is inserted on the correct side - the chip should be pointing downwards.
• 📶 Open your carrier’s coverage map (like RootMetrics) and make sure there are no network problems in your area.

If SIM-All in order, we move to the network settings:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if there are several).
3. Make sure the mobile internet switch is activated.
4. Check the network mode: for 4G choose LTE (or 4G/3G/2G), for 5G — 5G/LTE/3G/2G.

⚠️ Note: Some Xiaomi models (e.g. Redmi Note 10 Pro) when selecting a mode 5G If after the change of mode, not only the Internet, but also the ability to call, you lose the settings, return to the original state.

2.APN Access Point Settings: Why It Matters

Incorrect APN (Access Point Name) settings are one of the most common causes of mobile Internet inaccessibility, especially after a carrier change, firmware update, or setting reset, and many Xiaomi users find that the phone does not automatically load the correct APN settings and have to enter them manually.

To check and change the APN:

1. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Access points (APN).
2. If there are several APNs on the list, select the one that matches your carrier (e.g., internet.mts.ru for MTS).
3. If there is no APN, click "Add Access Point" and enter the settings manually.

Below is a list of current APNs for popular Russian operators (2026):

Once you have entered the settings, be sure to save the settings and restart the phone. If the APN is not saved or resets after a reboot, this may indicate problems with firmware or access rights to system files.

3. Problems with firmware and MIUI updates

Mobile Internet outages are often caused by MIUI updates or incorrect firmware installation, such as the upgrade to MIUI 14, when many Xiaomi 12T and Redmi K50 users complained of network loss, due to errors in the RIL (Radio Interface Layer) module, which is responsible for communicating with the operator.

How to diagnose and correct:

• 🔍 Check the firmware version. Go to Settings. → The phone. → Version. MIUI. If the version is older than the current version (for example, MIUI 13.0.5 if you have 14.0.2), update via Settings → Updating the system.
• 📥 Network reset. Sometimes reset without data loss helps: Settings → Memory. → Resetting settings → Resetting network settings.
• 🛠️ Fastboot Firmware. If the problem has occurred after the update, try rolling back to the previous version or installing the firmware again through the Mi Flash Tool.

⚠️ Attention: Fastboot flashing runs the risk of losing data if you don't backup.On models with a locked bootloader (Redmi) 9A, POCO M3) You will need to unlock through the Mi Unlock Tool, which takes up to 72 hours.

If the mobile Internet disappeared immediately after the update, try to clear the cache:

1. Turn off the phone.


2. Press the power button + volume up until the Mi logo appears.




3. From the Recovery menu, select Wipe Cache.




4. Reset the device.

Hardware malfunctions: antenna, communication module, SIM-tray

If the software methods didn't work, the problem could be in the hardware, and most often, it fails.

• 📡 Antenna module: Falling of the phone or getting moisture can damage the antenna responsible for mobile communication.
• 🔌 SIM-oxidation or contamination of contacts leads to poor connection with the SIM-Check the tray for damage.
• 📱 Modem: On Xiaomi models with Qualcomm processors (such as the Snapdragon 8 Gen 2), the modem can overheat and shut down.

How to check the hardware:

1. Testing with another SIM-Put the work card in. SIM If the Internet is working, your problem is yours. SIM or operator account.
2. Check the engineering menu. Dial ##4636##, select Phone Information and see network status. If the Service State bar says Out of service, the communication module is down.
3. Diagnostics antenna. Use the Network Signal Guru app (available on Google Play) to check signal strength. If the RSRP is below -110 dBm, the antenna is not working properly.

⚠️ Note: If the phone fell or came into contact with water, do not try to disassemble it yourself - this can aggravate the damage. In Xiaomi service centers, the diagnosis of the antenna module costs from 500 rubles, replacement - from 1500 rubles (for Redmi models).

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If mobile internet is only available in 2G mode, try manually setting the LTE only network type in the engineering menu (#4636# → Network settings → Set preferred network type).

5. IMEI blocking and operator issues

One of the most frustrating reasons for the lack of mobile Internet is the blocking of IMEI, which can happen for several reasons:

• 🚨 Loss or theft of a phone. IMEI at the request of the owner.
• 📦 Buying a gray phone, devices brought from abroad without official unpacking may have a malfunctioning device. IMEI for Russian networks.
• 🔧 Incorrect recovery IMEI. After firmware or repair IMEI It could have been replaced or replaced with an incorrect one.

How to check IMEI and blocking statuses:

1. Find out your IMEI by typing *#06#.
2. Check it on the IMEI.info website or through the operator service (for example, MTS Personal Account).
3. If IMEI is blocked, contact the salon with documents on the phone.

Mobile Internet can also be disabled by the operator:

• 💰 Check the balance and status of services in your personal account.
• 📵 Some tariffs (e.g. MegaFon's "For Laptop") do not support phone service.
• 🔒 Activation of Aircraft Mode on the operator's side, which happens when fraud is suspected.

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If the phone's IMEI starts with 0044 or is displayed as null, it means it's reset or damaged, and can only be restored through a service center or specialized utilities (such as Maui META for Mediatek chips).

6. Conflicts with applications and VPNs

Mobile internet may not work due to conflicts with installed applications, especially if they:

• 🔒 Use it. VPN. Some of them VPN-Services (e.g., ProtonVPN or NordVPN) can block traffic if the server is not available.
• 🛡️ Antiviruses or firewalls: Applications like Kaspersky or Avast sometimes block the system processes that control communication.
• 📱 Memory Optimizers: Clean Master utilities can close background processes, including the mobile network module.

How to diagnose:

1. Run your phone in Safe Mode (press the power button → Safe Mode). If the Internet is running, one of the installed applications is to blame.
2. Check your VPN settings: disable it in Settings → Connections → VPN.
3. Remove newly installed applications, especially those that have requested network access or SMS.

If the problem is MIUI firewall:

1. Go to Settings → Applications → Permissions → Firewall.
2. Find apps with access to mobile data and turn off restrictions.

7. Specific problems of Xiaomi models

Some Xiaomi models have unique mobile internet bugs, and the most common ones are:

For models with Mediatek processors (Redmi 10C, POCO M4 Pro) is characterized by a problem with automatic switching between 4G and 3G. If the Internet is constantly “hanging”, try:

1. Dial ##4636##.


2. Select "Phone Information".




3. Under "Set preferred network type" select LTE only.

8.When to contact the service center

If you have tried all the ways, but mobile Internet on Xiaomi still does not work, it is time to contact the service.

• 🔧 The antenna module or modem is damaged, and symptoms are: no network at all, even after resetting.
• 📵 Dropped or damaged IMEI. The settings display zeros or nulls.
• 🔥 The phone gets very hot and the Internet goes away when you're loaded (for example, in games).
• 💧 Even if the phone turns on, the contacts can corrosion in a week or two.

Cost of repairs in official Xiaomi service centers (2026):

• Diagnosis is free (if repairs are performed at their place).
• Replacement of the antenna module - from 1200 rubles.
• Restoration of IMEI - from 800 rubles.
• Repair after moisture is ingested - from 2500 rubles (depending on the degree of damage).

⚠️ Warning: Unofficial services may offer recovery IMEI 300-500 rubles, but this is fraught with problems with the guarantee and legality (in Russia, the change is not possible). IMEI without permission of the operator is prohibited).

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Before visiting the service, back up your data via Settings → Additional → Backup. Hardware repairs may require a complete phone reset.

FAQ: Frequent questions about mobile Internet on Xiaomi