A modern smartphone is impossible to imagine without access to the global network, and Xiaomi devices are no exception here. SIM-Mobile Internet stops working despite the availability of a tariff plan, this may be due to the lack of correct settings of the access point. APN or a banal failure in the software.
In most cases, the problem is solved in minutes, if you know where to look for the options in the menu, you don't have to be a telecommunications expert to restore a mobile connection, just follow the algorithm of actions described below and check the key switches in the MIUI system.
Before starting a deep diagnosis, you should make sure that there are funds on the balance sheet, and the SIM-If you just inserted a new chip, it may not automatically configure, requiring manual operator input. In this guide, we'll look at everything from enabling basic functions to prescribing complex configurations.
Primary activation of the mobile Internet
The easiest way to start data transfer is to use the Quick Access Panel. Swipe down from top to bottom to open the notification curtain, and find a two-arrow icon or the words "Mobile Internet," clicking on this element will activate the connection if it has not been blocked before by the system.
However, if the icon is on but the pages are not loading, you need to check the settings. SIM-Go to the settings. → SIM-Maps and mobile networks. It's important to make sure that the right slot is opposite the "Use the Internet" switch. In dual-symbol Xiaomi devices, there is often confusion when traffic tries to go through a card that does not have a tariff connected.
⚠️ Note: If you use two of these SIM-maps, make sure that the card selection menu for the Internet selects the one on which the data packet is activated.
Also, you should pay attention to the mode of operation of the network. In the section Preferred network type, you should choose a combined option, for example, LTE Preferred, which will allow the phone to automatically switch between 4G and 3G depending on the signal quality in your location, ensuring the stability of the connection.
- 📱 Check if the indicator is on. 4G/LTE status bar after inclusion.
- 💳 Make sure that SIM-The card is defined by the system and does not require PIN-code.
- 📶 Try turning on and off In-Airplane mode to reboot the communication module.
Sometimes the system requires a reboot after a shift. SIM-Don't ignore this step, as it allows the phone to re-register in the operator's network and get the current gateway settings.
Manually configuring the APN access point
The most common reason for the lack of Internet is an incorrect or missing APN hotspot. Communication operators transmit these settings automatically via SMS, but on Xiaomi smartphones with global firmware, this mechanism sometimes fails. You will have to create a profile manually by entering data provided by your carrier.
To start, go to the Settings menu. → SIM-Maps and mobile networks. Choose the right one. SIM-Map and find the "Access Points" item (APN)». In the list that opens, click the button “New Access Point” or “Create” APN». You will need to fill in a few fields, most of which can be left unchanged.
Where do I get the exact APN data?
The key fields are "Name" and "Access Point (APN)." In the "Name" field, you can write any convenient notation, such as MyOperator. In the "Access Point" field, you need to enter the gateway address, which usually looks like the Internet or mms, depending on the operator's requirements. The remaining fields, such as username and password, are often left blank.
| Parameter | Value for most operators | Must be filled in. |
|---|---|---|
| Name. | Any (e.g. Operator) | Yes. |
| APN | internet / mms / wap | Yes. |
| proxy | Not given. | No. |
| Port port | Not given. | No. |
| Type APN | default,supl | Yes. |
Once you have entered, be sure to click the menu (three dots in the corner) and select Save. Then go back to the access point list and activate the one you have created by putting a marker next to it. Without saving and activating, the changes will not take effect.
☑️ Checking settings APN
Diagnostics problems with Wi-Fi connection
If the mobile internet is working but the wireless Wi-Fi network refuses to connect, the problem may be a conflict. IP-On Xiaomi devices, it often helps to reset network settings or change the type of encryption. First try forgetting the network: click on the name of your Wi-Fi network in the list of available and select "Delete" or "Forget».
Then reconnect by re-entering the password. If that doesn't work, go to advanced Wi-Fi settings. IP» and switch it from DHCP You can try this manually. DNS-servers, for example, from Google (8.8.8.8), which often solves problems with long loading pages.
⚠️ Note: When manually installing static IP-Addresses make sure you do not include an address that is already occupied by another device on your local network, otherwise there will be a conflict of addresses.
Another cause of failure may be the Wi-Fi Assistant feature, which automatically switches the phone to mobile internet if the Wi-Fi signal seems weak. Turn off this option in the Wi-Fi settings so that the phone does not break the connection without your knowledge.
- 🔄 Restart the router, disconnect it from power for 10 seconds.
- 📡 Check if the router has a filter on MAC-address.
- 🔒 Make sure that a compatible type of security is used (WPA2/WPA3).
In some cases, disabling the Private Address feature in the settings of a particular Wi-Fi network on your phone helps. This feature, introduced in new versions of Android, changes the way you use it. MAC-Device address for privacy, but older routers can block such connections.
Resetting network settings and radio module
When simple methods don't work, a more radical approach is needed: resetting your network settings, which won't affect your personal files, photos or contacts, but will delete all stored Wi-Fi passwords, paired Bluetooth devices, and mobile hotspot settings, an effective way to fix software configuration errors.
You can reset through the Settings menu → Connection and sharing → Reset Wi-Fi, mobile networks and Bluetooth.The system will warn you of the consequences and ask you to enter the password unlock the screen or PIN-Once confirmed, the phone will restart the network modules.
Alternatively, you can use an engineering menu to check the status of the radio module, enter the code ##4636## in the Phone app, and you can open a testing menu where you can force the type of network or check the status of the connection in the Phone Information section. Be careful: changing unknown parameters here can lead to unstable communication.
If the Internet didn't come back after the reset, the problem could be deeper, the system file that runs the radio may be damaged, and in such cases, updating the firmware through the Recovery Recovery menu or completely resetting to factory settings helps, but this is an extreme measure.
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Before performing a full reset, be sure to back up important data to the Mi Cloud cloud or your computer, as this process will remove all information from the device.
The Impact of Third-Party Apps and VPNs
Often the reason for the lack of Internet are installed by the user applications, especially antiviruses, firewalls or VPN-They can intercept traffic and block connections if their algorithms are not working properly or their subscriptions have expired. Check the list of applications that are running and try to disable all such services.
MIUI has a built-in traffic saving and ad blocking feature that can also conflict with connectivity. Go to the Security → Data Transfer app and check if the backlink limit for system services or browser is worth it. Allow all the necessary applications to access the network.
Memory cleanup applications can aggressively close the background processes that maintain a connection to the operator’s servers, and add important system services to the exclusion or “boot” list so that the system doesn’t kill them to save battery life.
- 🛑 Turn it off. VPN Proxy servers in Wi-Fi and mobile network settings.
- 🔍 Check the Internet access rights of applications in the Security menu».
- 🧹 Clear the browser cache and system application "Downloads».
If you have recently installed new software, try removing it and checking the Internet, and sometimes malware disguised as a utility can change network configurations to its own purposes.
Hardware malfunctions and SIM replacement
It is not necessary to exclude physical breakdown. SIM-The cards tend to wear out: the contacts oxidize, the chip is erased from time to time. 3-5 You should go to the operator's salon for a free replacement. SIM-Cards may not support modern encryption standards 4G/LTE.
Check the tray, too. SIM-Carefully remove it, wipe the contacts with dry soft cloth and insert back, making sure the card is flat and not hanging.
⚠️ Warning: Never use metal tools to extract SIM-Damage to the contacts inside the slot can require expensive motherboard repairs.
In rare cases, the communication module itself in the phone fails, especially if the device has been hit or moisture has been hit. SIM-card (check by moving the card to another phone), and software methods do not help, there is likely a hardware malfunction of the antenna or controller.
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If none SIM-The card does not work in your phone, and in other devices they function normally – this is a direct sign of hardware failure of the communication module.
For accurate diagnosis in service centers use special boxes that check the signal level and frequency operation. You can only visually assess the condition of the connectors and try to warm up the device (caution!), since sometimes contact is restored from temperature expansion, but this is a temporary solution.