If your Xiaomi smartphone (or Redmi/POCO) suddenly loses access to mobile Internet, does not show the 4G/5G icon in the status bar, or gives an error “No Internet connection”, the problem most often lies in the disabled data transfer. This feature can be deactivated after updating MIUI, resetting settings or even accidentally clicking. In this article, we will discuss all the ways to enable mobile data on Xiaomi devices, including hidden settings and solutions for specific models.
It's important to understand that data and mobile Internet are not exactly the same thing. SIM-map, and the second includes settings APN, networking (2G/3G/4G/5G) We'll look at both, and we'll also talk about how to diagnose problems when the Internet never works. MIUI 12–14 All modern smartphones of the brand, including Xiaomi 13/14, Redmi Note 12 and POCO F5.
1. Basic method: enable mobile data through the notification panel
The fastest method is to use the notification bar, which works on all Xiaomi devices, regardless of the firmware version.
- Swipe your finger down the screen to open the notification bar.
- Find the Mobile Data icon (usually depicted as a wave antenna or the words “4G/5G”).
- Tap the icon once. If it's blue/green, data is turned on.
⚠️ Note: Some models (e.g. Redmi) 9A or POCO M3) The icon can be hidden behind the "More" button (three dots). Click on it to turn all the switches around.
If the Internet does not work after turning on, check:
- 📶 Network signal strength – you may be in a poor coverage area.
- 💳 Balance SIM-cards – for some operators (for example, Tele2 or Iota), the Internet is blocked with a negative balance.
- 🔄 Plane mode – if it is activated, mobile data will not work.
2. enable data transmission via MIUI settings
If the notification bar is unresponsive or the mobile data icon is missing, try enabling the feature via the settings menu.This method is also useful if you want to set up an automatic connection or limit background traffic.
Instructions:
- Open the Settings app (cog icon).
- Go to section. SIM-Maps and mobile networks (or Mobile Network on older versions) MIUI).
- Choose yours. SIM-card (if there are several).
- Activate the "Mobile Data" switch.
In addition, this menu can be:
- 📊 Set a traffic limit (useful for tariffs with limited internet).
- 🔄 Enable “Autoconnection” (the smartphone will automatically switch to mobile data in the absence of Wi-Fi).
- 📵 Disable background data transfer for individual applications (saves battery power).
☑️ Checking before turning on mobile data
3. setting up APN for the correct operation of the Internet
If mobile data is turned on but the internet is still down, the problem may be in the hotspots (APN). These are the settings that determine how the smartphone connects to the operator's network. They can get lost after the update. MIUI shift SIM-map.
To set up the APN:
- Open the Settings. → SIM-maps and mobile networks.
- Choose yours. SIM-map → Access points (APN).
- Click on the three dots in the top right corner and select "New Access Point".
- Enter your operator’s parameters (see table below).
- Save the settings and restart the smartphone.
| Operator. | APN name | APN | Type of authentication |
|---|---|---|---|
| MTS | mts | internet.mts.ru | Not established. |
| Beeline | beeline | internet.beeline.ru | PAP |
| Megaphone | megafon | internet | Not established. |
| Tele2. | tele2 | internet.tele2.ru | PAP |
⚠️ Note: If after setting up APN The internet is still not working, check if the firewall is blocking it. MIUI. To do this, go to the Settings. → Annexes → Permits → Firewall and disable restrictions for browser and other programs.
What to do if the operator is not on the list?
4.Disabilities with data transfer on double SIM-map
Xiaomi devices with support for two SIM-cards SIM) Sometimes they face conflicts when connecting to the Internet, for example, a smartphone can “forget” which card should use mobile data, or automatically switch to inactive. SIM.
How to set up the Internet on a double SIM:
- Open the Settings. → SIM-maps and mobile networks.
- Select the section "Mobile data".
- Tell me which one. SIM-The card must be used for data transfer (the option “Default for data»).
- If necessary, activate the “Allow data switching” option (allows you to use the Internet with both SIMs, but can lead to conflicts).
Frequent problems and solutions:
- 🔄 Automatic switching: If the smartphone itself switches between SIM, Turn off the “Allow Data Switching” option in the settings.
- 📵 No network on second. SIM: Check if your model supports the two. SIM mode 4G At the same time (on some devices, the second one) SIM only works 2G).
- 🔋 Fast battery discharge: When data is actively transmitted on two SIM Power consumption increases. Turn off background transmission for unnecessary applications.
💡
If you travel frequently, create separate APN roaming profiles. In the APN settings, add a new profile with your operator's options for overseas trips (usually different from home).
5. Hidden network settings: engineering menus and USSD commands
If standard methods do not help, you can try to enable data transfer through the engineering menu or USSD-These methods are suitable for experienced users and can help in cases where the interface is used. MIUI malfunctioning.
Method 1: USSD-team
Some operators provide special commands to activate the Internet, try typing them into the Phone app:
- 📞 For MTS: *111*1# (Checking the balance and status of services).
- 📞 For Beeline: *110*180# (internet activation).
- 📞 For MegaFon: *105# (service management).
Method 2: Engineering menu
Warning: Changes to the engineering menu can cause the network to run in an unstable way, and use this method only if other methods have not worked.
- Open the Phone app and enter the code ##4636##.
- Go to the section "Phone Information".
- In the “Install preferred network type” block, select LTE/4G (or NR/5G if your smartphone supports).
- Return and select “Disable Data Transfer” then “Enable” again.
On some models (e.g. Xiaomi Mi 11 or Redmi K40), the engineering menu may be blocked, in which case use the alternative code: ##225## (calendar information check) or ##2664## (sensor test).
6 Problem Solving: Why Mobile Data Is Not Included
If neither of these methods worked, the reasons could be more serious.
| Problem. | Possible cause | Decision |
|---|---|---|
| Mobile data switch is inactive (grey) | Misfunction of MIUI or damage to system files | Reset network settings: Settings → Memory and backup → Reset settings → Reset network settings |
| The Internet only works in roaming. | Incorrect APN settings or operator lock | Update the operator’s service profile (usually SMS with settings) or contact support |
| The smartphone does not catch the network (no signal) | Damage. SIM-card, slot or antenna module | Try another one. SIM-If there's a problem, go to the service center. |
| Mobile data is turned on, but the internet is not working | Blocking traffic by the operator or DNS failure | Try changing the DNS in your Wi-Fi/mobile network settings or use a VPN |
⚠️ Note: If the problem persists after resetting your network settings, check if your smartphone has root rights or custom firmware installed. These may conflict with Qualcomm or Mediatek modems that are used in Xiaomi devices.
💡
Before contacting the service center, check the work SIM-If the Internet doesn't work there, the problem is with the operator, not the smartphone.
7. Features for specific Xiaomi models
Some Xiaomi smartphones have unique “chips” or bugs associated with data transfer.
- 📱 Xiaomi 13/13 Pro, 14: Support 5G SA/NSA, In some regions, manual activation is required. SIM-map → Preferred type of network → 5G.
For hybrid slot models (such as the Redmi 9T or POCO X3 NFC) where the second SIM and memory card share one slot, data transfer can be disabled when the microSD is inserted.