Mobile Internet on Xiaomi is not working: a complete guide to troubleshooting

You are faced with a situation when the smartphone Xiaomi suddenly stopped working mobile Internet, and the network indicator shows everything. 1-2 sticks or no sign at all 4G/5G? This problem is familiar to many owners of the brand’s devices – from budget Redmi to flagship Xiaomi. 13/14. The reasons may lie in software failures MIUI, and in the hardware faults of the communication module.

Unlike Wi-Fi problems, where the router is often to blame, the lack of mobile internet is usually due to phone settings, SIM card or operator, and in this article we will look at all possible scenarios, from basic checks to deep technical solutions. You will learn how to diagnose the problem, what parameters APN Xiaomi should be on the market in 2026, and what to do if the network disappears after the update MIUI.

Importantly, if the Internet doesn't work on two SIM cards at the same time, it's probably the hardware (antenna, modem), and if you only have a problem with one SIM, you check the settings and the operator, and let's start with the simplest one.

Basic checks: SIM card, flight mode and geofences

Before digging deep into the settings, make sure the problem isn’t on the surface. According to statistics, 30% of mobile internet absences on Xiaomi are solved with these simple actions:

• 📱 Reset your smartphone. Hold the power button for 10 seconds until the turn off menu appears. This will reset the temporary errors of the communication module.
• ✈️ Check flight mode. Even if the icon doesn't burn, go to Settings. → Connections → Flight mode and turn it off. Sometimes a failure leads to "invisible" activation.
• 📶 Make sure you're in coverage. Open your carrier's coverage map (like RootMetrics) - you may be in the "dead zone".
• 🔄 Change the SIM card slot. If you have Xiaomi with two slots, move the SIM to another slot. Sometimes the contacts of one slot oxidize.

Pay special attention to geofences, and if you've recently crossed the border, the operator could automatically connect roaming with limited Internet access. USSD-command (e.g. *100# for MTS).

⚠️ Note: Some Xiaomi models (e.g. Redmi Note) 10 Pro after updating to MIUI 14 You get a bug that sticks in the flight mode, and if the reset doesn't work, try manually turning it on and off. 2-3 successively.

2. Mobile network settings: APN, Type of connection and priority

If the basic checks don't work, it's time to look at the mobile network settings, and most of the time, the problem is incorrect settings. APN (access point) or the wrong type of network. On Xiaomi, the path to these settings:

Settings → SIM- Maps and Mobile Networks → [Select SIM] → Access Points (APN)

Here are the actual parameters APN for popular operators in 2026:

If your operator is not on the list or the parameters do not match, reset APN factory-to-factory:

1. Open the access point menu (APN).
2. Click on the three dots in the upper right corner → Reset settings.
3. Reboot the phone.

Also check the type of connection:

• 📶 Go to Settings. → SIM-map → Preferred type of network.
• 🔄 For 4G choose LTE (or 4G/3G/2G switch-over).
• 🚀 For 5G (If supported, select 5G/LTE/3G/2G.

Make sure that mobile data is included|Check the correctness APN|Choose the right type of network (4G/5G)|Reboot your phone after the changes-->

3. Reset network settings and update firmware

If the mobile Internet Xiaomi disappeared after the update MIUI Or custom firmware, which would help reset network settings, and that would remove all the stored Wi-Fi networks, passwords and settings. APN, But it will return factory values that are guaranteed to work.

Instructions:

1. Go to Settings → About the phone → Reset settings.
2. Select Network Reset (not to be confused with a full reset!).
3. Confirm the action and wait for the reboot.

After discharge:

• 🔄 Reset it. APN (parameter, see the previous section).
• 📱 Check the Internet in Safe Mode (press the power button) → Safe Mode: If it's running the Internet, it's the third-party app's fault.

If the problem has occurred after the MIUI update, try:

• 🔄 Reverse to the previous version through Settings → The phone. → Updating the system → Three points. → Select a Service Package.
• 📲 Install the latest stable firmware manually through the Mi Flash Tool (instruction for advanced users).

⚠️ Note: On some Xiaomi models (e.g, POCO F3) After the network is reset, the ability to edit is lost. APN. To return this function, you need to manually add a new one. APN Default name and mmsc (even if you don't need it).

4.Problems with SIM card and operator

Sometimes it's not the phone that's the fault, it's the SIM card or the operator.

• 🔄 Reboot the SIM card. Pull out the SIM, wipe the contacts with a pin (to remove oxidation), then paste back. on some Xiaomi (e.g. Redmi) 9A) SIM card contacts may move away over time.
• 📞 Check balance and packages. USSD-A balance check team (e.g. *100# for MTS) may have run out of the Internet packet or activated the "Applications Unlimited" option, which blocks overall traffic.
• 🔄 SIM card replacement if the SIM card is older 3-5 It may not be up to date with modern standards. 4G/5G. Contact the carrier for a new nano-SIM or eSIM (if your Xiaomi supports it).
• 📡 The operator has problems. Check the status of the operator's network on its official website or on Twitter. For example, MegaFon often crashes in the Moscow region in the evenings.

If you use eSIM, try:

1. Delete and re-activate the eSIM profile through the operator application.
2. Check if your model supports Xiaomi eSIM (List of supported devices: Xiaomi) 12/13/14, POCO F4/F5, Redmi K50 Pro).

On Xiaomi models with a MediaTek processor (for example, Redmi Note 11) sometimes fails IMEI After the firmware is leaked, which leads to the loss of the network. IMEI *#06# - if it is missing or incorrect, you need to restore it through the MTK Engineering Mode.

5. Software failures: Safe mode, cache and application rights

If the mobile Internet is in safe mode, but disappears in normal mode, one of the installed applications is to blame.

• 🔒 VPN-Clients (e.g. NordVPN, ProtonVPN) that block traffic.
• 🛡️ Antiviruses (Avast, Kaspersky) with network protection.
• 📱 Optimizers (Clean Master, DU Speed Boosters that aggressively close the background processes.

How to find the culprit:

1. Load into Safe Mode (click the Power button) → Safe regime).
2. If the Internet is working, delete applications one at a time, checking the network.
3. Pay special attention to applications with rights VPN and Changes in system settings.

Also help to clean the cache of system services:

1. Go to Settings → Applications → Application Management.
2. Find Telephony Services and Services SIM-cards, clear cache and data.
3. Reboot the phone.

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If after removing the application, the Internet has earned, but you need it - try to disable the permission to use mobile data in the application settings.

Hardware malfunctions: antenna, modem and IMEI

If none of the previous methods worked, the problem could be the hardware.

• 📡 Antenna damage, often after a phone falls or moisture gets in the air, symptoms: the net of coverage jumps, the Internet comes and goes.
• 🔌 SIM card contact oxidation manifests as the absence of a network on one SIM while the second one is working.
• 📱 Modem crashes, modems can die after a failed upgrade or overheating, with the phone not catching the network at all (even if it doesn't catch the network). 2G).
• 🔢 Loss of loss IMEI. If you enter *#06# you see Null or an incorrect IMEI, The modem cannot log in to the network.

How to diagnose:

1. Check it out. IMEI If it is missing, you need to restore (instructions for MediaTek and Snapdragon are different).
2. Network test. Type ##4636##, select Phone Information, and see network status. If Service State has Out of Service, the problem is in the modem or SIM card.
3. Check the antenna. Call the phone from another device. If the call passes but the Internet is not working, the problem is the settings. APN If the call doesn't go through, the antenna or modem is broken.

If the diagnosis showed a hardware problem:

• 🔧 Contact Xiaomi Service Center (the warranty is valid for 12 months on modem and antenna).
• 🛠️ For recovery. IMEI MediaTek can be used on MTK Engineering Mode (root rights required).
• 🔄 If the phone is warranty, do not open it yourself - this will cancel the warranty.

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Loss of loss IMEI — One of the most common hardware problems on Xiaomi with MediaTek processors, recovery is possible, but requires caution: wrong actions can block the modem forever.

7. Features of specific Xiaomi models

Some Xiaomi models have unique mobile Internet bugs, and here are the most common:

For Snapdragon devices (e.g. Xiaomi 12 Pro, POCO F4) There is a special utility Qualcomm QPST, It's a system that allows you to manually configure the modem, but it requires an unlocked bootloader and experience.

If you have Xiaomi with support 5G, but the net doesn't catch:

• Make sure your operator supports you. 5G in your region.
• Check if the option is on. 5G customized SIM-map.
• Update the firmware to the latest version – in old builds MIUI Could have been off the modem. 5G.

8. Alternative solutions: debugging menus and engineering codes

If standard methods don't work, you can try hidden engineering menus, which give you access to low-level modem settings, but you need to be careful, because the wrong changes can make the phone fail.

The most useful codes for Xiaomi:

• #4636### - network and battery information. In the phone information tab, you can force the type of network to be selected.
• ##225## - signal calculator (shows the dBm level, which can be used to judge the quality of communication).
• ##7262626### - Test GPS Networks (useful if the Internet is lost when turned on) GPS).

For models on MediaTek (e.g. Redmi Note 11):

1. Enter #36446337## to access the Engineering Mode.
2. Go to MTK Settings → BandMode.
3. Choose. LTE and mark all supported ranges (e.g, B1/B3/B7/B20 for Russia).
4. Save the settings and restart the phone.

⚠️ Attention: On some firmware MIUI If nothing happens after you enter the code, try using the app. MTK Engineering Mode from Google Play (root required for full access).

If you are not afraid of experimentation, you can try to change the firmware region:

• Download the firmware for another region (for example, EEA Global instead).
• Install it through System Update → Three points. → Select a Service Package.
• This may help if you have your version. MIUI some ranges are off 4G/5G.

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Before using engineering codes, make a backup of the data through Settings → Additionally. → Backup and reset: Some changes may result in resetting.

FAQ: Frequent questions about mobile Internet on Xiaomi