Why Xiaomi doesn’t have mobile internet: a full analysis of the reasons and solutions

You have enabled mobile data on Xiaomi, but pages are not loaded, messengers are not updated, and the network icon shows H+ instead of 4G/5G? The problem with mobile Internet connection is one of the most common among owners of smartphones Redmi, POCO and Mi. The reasons can lie in both banal settings and hardware malfunctions. In this article, we will analyze all possible scenarios, from errors in the parameters of APN to damage to the modem chip, and give clear instructions for diagnosing and troubleshooting.

It is important to understand if the Internet stopped working after the update MIUI, drop-off SIM-So we structured the material so that you can quickly find your case, from simple checks (like flight mode) to complex ones (like flashing a modem). FAQ Frequently Asked Questions and Network Compatibility Table for Xiaomi.

Before you start settings, make sure that the problem is not on the operator's side. SIM-card to another phone or contact support (for example, via *111# for MTS, *105# for Beeline). If the Internet is working on another device, go to the Xiaomi diagnostics.

Basic checks: what to do first

Start with the obvious — sometimes the problem is solved in 30 seconds. These steps are relevant for all Xiaomi models, from the Redmi Note 10 to the Xiaomi 13 Ultra:

• 📶 Flight mode: check if it's activated by accident. MIUI bug with spontaneous activation of this mode after the update.
• 🔄 Reboot: Turn off the phone for 1 minute and turn it on again.
• 📱 SIM-map: remove the tray, wipe the contacts of the card with a dry cloth and insert back in. Sometimes oxidation of the contacts leads to loss of the network.
• 📶 Manual network selection: go to Settings → SIM-maps and mobile networks → Select the network and select the operator manually (not "Automatically").

If the Internet is not working after these manipulations, go to the next section. SIM-cards (Dual) SIM) Mobile data can be tied to a particular slot. Check this in Settings → SIM-maps and mobile networks → Mobile data.

2.APN settings: why the internet doesn’t work even if you have a network

Incorrect APN (Access Point Name) settings are the most common reason for the absence of Internet when cellular communication is stored.

• 🔄 Updates MIUI (reset).
• 📱 Shifts SIM-card-carrier.
• 🛠️ Manual editing APN (input errors).

To check and fix the APN:

1. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Access points (APN).
2. If there are several profiles, choose the one that matches your operator (for example, Internet.mts.ru for MTS).
3. Click on the profile and check the parameters. They must match the official data of the operator (see the table below).
4. If there is no profile, create a new one (button + in the top corner) and enter the data manually.

Critical error: Some MIUI 14+ firmwares will lose the APN type field after resetting the APN settings, in which case manually enter default,supl (for 4G) or default,supl,ia (for VoLTE).

Make sure you have the correct APN| profile selected

Verify the parameters with the official data of the operator |

Save changes and restart the phone |

Check if the badge is up. 4G/5G status-line-->

3.Problems with SIM-ranging from incompatibility to physical damage

If the mobile internet does not work only for one person SIM-The map, and the other one connects normally -- the problem is probably with the map itself or its settings:

• 🆔 Incompatible format: Xiaomi new models (for example, Redmi Note 12 or Xiaomi) 13T) They do not support older Mini-SIMs.
• 🔒 Operator lock: If you haven't used the card in a long time, the operator may have suspended the service "Data transfer". USSD-command, for example, *111*0887# for MTS).
• 📱 Contact damage: if the phone falls or gets moisture, contacts SIM-The tray could have oxidized. Look at them with a magnifying glass, and the greenish coating indicates corrosion.
• 🔄 Activation error: new SIM-The cards sometimes require activation through a call or SMS. If you don’t activate it, the mobile internet won’t work.

For diagnosis, insert a problem SIM-If the Internet is not working, contact the operator for a replacement. If you work, there is a problem in Xiaomi (see the sections on settings or hardware malfunctions).

⚠️ Note: Xiaomi with hybrid slots (e.g. Redmi) 9A) You can't use two at the same time. SIM-If you put in a microSD, the second one is a card. SIM shut down.

4. Software glitches: from MIUI updates to viruses

Modem malfunctions are often associated with firmware or conflicting applications.

• The Internet only works in 2G/3G, although the network supports 4G/5G.
• Network icon appears, but pages don't load (error) DNS_PROBE_FINISHED_NO_INTERNET).
• After the MIUI update, mobile internet disappeared, although Wi-Fi is working.

Decisions:

1. Network reset: Go to Settings → System & Device → Settings Reset → Network Reset. This will delete all stored Wi-Fi and mobile network settings, but return factory APNs.
2. Update rollback: If the problem has occurred after the MIUI update, try rolling back to the previous version via Settings → About Phone → System Update → Three Points → Select the Service Pack.
3. Virus check: Some Trojans block mobile traffic. Scan your phone through Google Play Protect or Dr.Web.
4. Safe Mode: Press the power button, hold off "Stop" until the Safe Mode window appears. If the Internet is running in it, the third-party application is to blame (remove the recently installed ones).

For advanced users, if the crash is related to the modem, you can try to reflash it separately from the system.

• Unlocked firmware for your model (download from Xiaomi Firmware Updater).
• The Mi Flash Tool or Fastboot tool.
• The command for modem firmware: fastboot flash modem NON-HLOS.bin

⚠️ Warning: Modem firmware via Fastboot can lead to loss IMEI. Before the procedure, save it via the command *#06# or the application. MTK Engineering Mode (for MediaTek processors).

5. Hardware malfunctions: when to carry in the service

If all the software methods have been tried, but the mobile Internet on Xiaomi still doesn't work, the problem may be the hardware.

It is difficult to diagnose hardware problems on your own, but you can test:

1. Put the work in. SIM-Card to another slot (if the phone supports Dual) SIM).
2. Check if IMEI is determined by *#06#. If Null is displayed instead of the number, the modem is burned.
3. Run the network test via the engineering menu: ##4636## → Phone information If there are no LTE/NR options in the Set preferred network type bar, the problem is in the modem or firmware.

The cost of repair depends on the model:

- Replacement of antenna cable: ~1 500–3 000 ₽.

- Modem chip soldering: ~5 000–10 000 ₽.

- Replacement of motherboard: ~15 000–30 000 ₽ (It is not profitable for budget models like Redmi. 10A).

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Before visiting the service, back up your data via Settings → Additional → Backup and Reset. After repair, you may need to reset your phone completely.

6. Features of specific Xiaomi models

Some Xiaomi models have unique problems with mobile internet, and we have collected the most common cases:

• Redmi Note 8/9 Pro (MediaTek): 4G disappears after upgrading to MIUI 13/14. The solution is a rollback to MIUI 12.5 or firmware custom core (for example, Havoc OS).

For models with MediaTek (for example, Redmi Note 11), you can try to activate hidden modem settings through the engineering menu:

##36446337##

In Band Mode, select LTE only and save the settings.

7.Problems with the operator: blocking, restrictions, technical work

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

• 📵 Blocking for non-payment: even with a positive balance, the operator can restrict the Internet for late payments (for example, Tele2 has a blocking after 3 days after the expiration of the payment period).

If you suspect a block, call the operator or check the status of services through:

• MTS: *111*0887# or personal account.
• Beeline: *102# or my.beeline.ru.
• Megaphone: *105*00# or lk.megafon.ru.
• Tele2: *155*1# or lk.tele2.ru.

⚠️ Note: if you use a virtual operator (e.g. Tinkoff Mobile, Yota), check if the tariff conditions have changed. MVNO limit mobile Internet when connecting to partner networks (for example, Yota in roaming MegaFon can only work in the Internet). 3G).

8. Alternative solutions: if nothing has worked

If all of the above methods have not worked, try the following options:

• 🔄 Factory reset: This is a last resort, but sometimes it helps. Save data before reset! Way: Settings → Additionally. → Recovery and discharge → Resetting settings.
• 📱 Using another device: If you need internet urgently, activate the hotspot on another phone or use it. USB-modem.
• 🛠️ Update to Fastboot: If OTA-updates do not help, manually swipe your phone through the Mi Flash Tool. instructions are available on xiaomi.eu or 4PDA.
• 📡 External modem: For stationary use can be purchased 4G/5G-router (e.g. Xiaomi Mi Router) 4G) and distribute the Internet over Wi-Fi.

If you want to get your phone repaired, go to Xiaomi's official service centers, informal workshops can use unoriginal parts, which will cause you to break again, and check the service addresses on mi.com.

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Before visiting the service, be sure to back up your data and delete personal information (photos, messages, passwords). After repairing the phone can be reset to factory settings.

FAQ: Frequent questions about mobile Internet on Xiaomi