The Internet does not work on Xiaomi: a full analysis of the causes and solutions

You have your own Xiaomi Redmi Note 12 or POCO X5 Pro, and the Internet suddenly stopped working - the pages do not load, messengers offline, and the network icon flashes cross or disappears. The situation is familiar? Connection problems on Xiaomi smartphones are more common than it seems: the fault and firmware features MIUI, And in this article, we're not just going to list the possible causes, but we're going to look at them in terms of specific models and software versions, from the commonplace Wi-Fi failure to the complex conflicts with the environment. IMS-profiles on the new Qualcomm chips.

It's important to understand that if the Internet is lost on only one device and other gadgets on the same network work normally, the problem is precisely the smartphone. If the network is not on all devices, the router or provider is to blame. We will focus on the first scenario, but also touch on the typical router configuration errors that most often affect Xiaomi (for example, conflict with the protocol). IPv6 lock-in MAC-address).

We warn you right away that some solutions will require access to the developer section or even flashing it. If you're not sure about your skills, you'd better go to the service center, but 80 percent of the time, you can fix the problem yourself in 5-10 minutes.

1.Problems with SIM-Map: From physical damage to errors IMS

The first thing you need to check is yourself. SIM-Even if it looks intact, the contacts could oxidize and the chip could get static damage. 13T or Redmi K60) Frequently encountered bug with incorrect activation IMS-profile, especially after updating MIUI. This causes the smartphone to “see” the network but cannot transmit data.

How to diagnose:

• 🔍 Check if it's being determined SIM in settings (Settings) → SIM-If the operator number is replaced by "No service", the card is inactive.
• 📶 Try to manually select the operator network in Settings → Mobile network → Network operators. If the search is frozen, the communication module is a problem.
• 🔄 Reboot your phone in flight mode for 30 seconds, then turn it off.

If SIM-The card is good, but the internet is not working, try it:

1. Remove and re-add the access point APN (settings must be from your operator’s website).
2. Reset network settings (Settings → System → Settings Reset → Reset settings Wi-Fi, mobile network and Bluetooth).
3. For models on MediaTek (e.g. Redmi) 10C) Check to see if the mode is on. 4G+/5G In Settings → SIM-map → Type of network.

⚠️ Attention: On some firmware MIUI post-discharge APN You lose the ability to edit the settings, they turn gray, and in this case, only resetting the phone to the factory settings or firmware through Fastboot will help.

2 Wi-Fi failures: from channel conflict to error DHCP

If mobile internet works and Wi-Fi doesn’t, the problem can be in both the smartphone and the router. Xiaomi is known for two common bugs:

• 📡 No connection to 5 GHz networks on older models (e.g. Redmi) 9A) due to incompatibility with encryption WPA3.
• 🔄 Constant communication breaks on new devices (e.g. Xiaomi 12 Lite) due to aggressive energy savings MIUI.

The first thing to do is:

1. Restart the router (take the power out for 1 minute).
2. On your smartphone, forget the network (Settings) → Wi-Fi → Press the net. → Forget) and connect again.
3. Check if the router is on mode 802.11n/ac (not 802.11b/g).

If the network is connected but the internet is not working:

• 🔧 Turn off the router settings IPv6 (A frequent problem with Xiaomi MIUI 13+).
• 🔒 Change the type of encryption with WPA3 on WPA2-PSK.
• 📊 Manually write it. DNS (For example, 8.8.8.8 and 8.8.4.4 from Google in the Wi-Fi settings on the phone.

Check to connect other devices to this Wi-Fi|

Restart router and phone |

Forget the network and connect again.|

Change the Wi-Fi channel in the router settings (from 13 to 6 or vice versa)|

Turn off power saving for Wi-Fi in developer settings-->

For advanced users: If the problem only appears on certain routers (such as TP-Link Archer), try disabling Beamforming or Mu-MIMO in your router settings – they sometimes conflict with Qualcomm chips in Xiaomi.

3. Programmatic failures: MIUI, updates

MIUI — It's one of the most customized firmware, but that's also its biggest weakness:

• 📱 System updates (especially with MIUI 12 on MIUI 13/14).
• 🧹 Cache cleansing through third-party optimizers (e.g. Clean Master).
• 🔧 Enabling Developer Mode or Changes to Build.prop.

How to fix it:

1. Clear the Modem cache (power users only!): fastboot erase modemst1 fastboot erase modemst2 Warning: This will delete all stored network settings, including Wi-Fi passwords.
2. Reverse the update MIUI through settings → The phone. → Updating the system → Three points. → Select the update pack (if the backup of the old version is saved).
3. Reset your network settings (see section about SIM-map).

If the problem has occurred after manually updating through Recovery, check firmware integrity. XDA Developers often have complaints about “broken” builds MIUI for POCO F3 or Redmi K40, whereupon IMS (responsible for the transmission of data to LTE/5G). In this case, only a complete flashing through Fastboot from the official Xiaomi website will help.

⚠️ Note: Some models (for example, Xiaomi Mi 11 Ultra) after reset to factory settings, the section disappears IMS This can't be fixed without firmware running the full firmware package.

Hardware malfunctions: antennas, modules and soldered contacts

If none of the software methods worked, it could be hardware.

• 📡 The tip of the antenna contact (often after a fall or impact). Especially relevant for the Redmi Note 10 Pro - there are antenna tracks along the edge of the body.
• 🔌 Damage to the module Wi-Fi/Bluetooth (Symptom: both modules stop working at the same time.
• 🔋 Battery bloating that presses on motherboard and disrupts communication module contacts.

How to diagnose:

1. If the call passes but the internet is not available, the problem is in the data module (possibly burned). RF-transceiver).
2. Connect to Wi-Fi. If it works and the mobile network doesn't, it's broken. SIM-module.
3. Check to see if the top of the phone is warming (the antennas are located there), and if you overheat, you'll see a short circuit.

Decisions:

• 🔧 If the phone fell - bring to the service for the diagnosis of soldered contacts. Self-repair without experience is fraught with final breakdown.
• 🔄 On models with removable battery (for example, Redmi) 9A) Try to remove the battery for 5 minutes – sometimes it will reset the “stuck” contacts.
• 📱 For Xiaomi Mi. 10T And similar with a metal body, check if you close the antenna with your hand - this can block the signal.

💡

If the phone stopped catching the network after changing the screen, check if the master has damaged the antenna tracks. Often in inexpensive services, they are accidentally cut when removing the glue.

Conflicts with the operator: blocking, IMS VoLTE

Sometimes the problem isn't with the phone, it's with the operator's settings, and this is especially true for:

• 🆔 New. SIM-cards (e.g. eSIM on Xiaomi 13 Lite).
• 📡 Operators who are actively implementing VoLTE/VoWiFi (For example, MTS or Beeline).
• 🌍 Roaming (especially in countries with other communication standards, such as the United States or Japan).

What to do:

1. Check with the operator whether your tariff supports data transfer in roaming (sometimes it is disabled by default).
2. If you have Xiaomi on MediaTek (e.g. Redmi) 9C), Ask the operator to send the settings IMS through SMS (not-all-firm MIUI They are used correctly automatically).
3. Turn off VoLTE and VoWiFi in Settings → SIM-map → Sometimes they are in conflict with data transfer.

For diagnosis:

• 📞 Dial ##4636## and select Phone Information. Check what the Service State value is. If Out of Service is there, the network is not logged in.
• 🔄 In the same menu, try manually switching the network type from LTE on WCDMA or GSM. If the Internet works – the problem in the settings 4G.

⚠️ Attention: On some firmware MIUI for POCO F4 GT And similar gaming smartphones disabled Band 20 (800 MHz), which is used by many operators for indoor coverage, and this can only be fixed through the engineering menu (#36446337##) or custom firmware.

6. Energy saving and background optimization

MIUI It aggressively optimizes background processes, which sometimes leads to a breakdown of the Internet connection:

• 📱 Xiaomi with a battery of less than 3000 mAh (e.g. Mi 11 Lite).
• 🔋 Devices in ultra-economic mode.
• 📲 Phones with Adaptive Charging enabled (it limits network activity as well).

How to turn off optimization:

1. Go to Settings. → Battery → Battery mode and select Performance.
2. B Settings → Annexes → App management find a browser or messenger that doesn’t have the internet for, and turn off Background Limitation.
3. In the developer settings (Settings) → The phone. → Version. MIUI → 7 taps) disable Background Limitation for applications.

For models with Qualcomm Snapdragon (for example, POCO F5) It will also help to disable the function. 5G PowerSave on the Engineering Menu (#4636## → Battery Information → 5G PowerSave Mode → Disable).

💡

If the Internet is only lost in certain applications (for example, in Telegram or Chrome), the problem is precisely in the background optimization. MIUI. Add these applications to exceptions!

Problems with the protocol IPv6 and DNS

Starting with MIUI 13, Xiaomi is actively implementing support IPv6, However, many routers and providers are still working with the IPv4. This causes the phone to connect to Wi-Fi, but the sites don't load.Symptoms:

• 🌐 Pages open only after a few attempts.
• 🔄 Speedtest shows speed, but browsers don’t work.
• 📱 In the router logs there are errors DHCPv6.

Decisions:

1. On the phone: go to Settings → Wi-Fi → Additionally. → Settings IP and choose IPv4.
2. On the router: turn off IPv6 in the local network settings (usually in the section) LAN or DHCP).
3. Change it. DNS On your phone: in Wi-Fi settings, hold your finger on the connected network → Change the network → Show additional parameters → Settings IP → Static → write down DNS 1.1.1.1 (Cloudflare) or 77.88.8.8 (Yandex).

For diagnosis:

• 🛠️ Install the PingTools app and check if the addresses are pinging ipv6.google.com.
• 📊 In Termux, execute the command: ping6 -c 4 2a00:1450:4009:80e::200e If the packets are lost, the problem is IPv6.

8. Viruses, VPN and third-party applications

Less commonly, but accurately, some apps can block the Internet.

• 🛡️ VPN-Clients (e.g. ProtonVPN or 1.1.1.1) that do not completely shut down.
• 🦠 Ad-blockers (such as Blokada or AdGuard) that redirect traffic through their own devices DNS.
• 📦 Chinese applications (e.g., Chinese applications, UC browser APUS Launcher that changes network settings.

How to check:

1. Load to Safe Mode (hold the off button) → long tap on "Switch off" → "Reboot in Safe Mode. If the Internet is working, it's the third-party app's fault.
2. Check the list. VPN In Settings → Connections → VPN. Remove all connections.
3. Turn off Private. DNS In Settings → The Internet and the Internet → Private DNS.

If the virus is the problem:

• 🔍 Install Malwarebytes and scan the system.
• 📱 Check the application rights in Settings → Annexes → Permits → Special access → Managing all files.
• 🗑️ Remove suspicious APK folder /sdcard/Download.

⚠️ Attention: On some firmware MIUI for Redmi and POCO Traffic Monitor (Security) is built in → Data Usage, which can block background traffic. Disable it or add applications to exceptions.

FAQ: Frequent questions