Mobile Internet on Xiaomi: how to enable, configure and troubleshoot

Have you just bought a new Xiaomi smartphone or are you struggling with the lack of mobile internet on your device? Regardless of the model — be it the Redmi Note 12, POCO X5 or Mi 11 — the process of activating mobile data is the same 90% of the time, but even experienced users sometimes miss key nuances, from the wrong APN settings to the disabled data mode in the background.

In this article, we’ll look at not only the basic steps to turn on 4G/5G, but also the rare reasons why the Internet might not work even when you’re setting it right. For example, did you know that some MIUI firmware uses the default Traffic Savings feature to limit background data consumption? Or that operators like MTS and Beeline automatically send SMSs with APN settings, but they don’t always apply without manual confirmation?

If you are looking for a solution for a particular model or version of MIUI, use the table of contents – we have collected instructions for all current firmware versions (including MIUI 14 and HyperOS). And if the problem persists, at the end of the article you will find FAQ with answers to the most common questions, including resetting network settings and checking for IMEI lock.

1. Basic ways to enable mobile Internet

So, to start with, basic checks, most of the time, mobile Internet doesn't work because of the commonplace, like a data blackout or an On-Air mode.

• 📶 Make sure that the network icon is displayed in the status bar (for example, 4G, LTE or 5G). If you see a cross or exclamation mark - a problem with connecting to the operator.
• 🔄 Reboot your smartphone. This helps in 30% of the cases when the network freezes after updating or changing. SIM-map.
• 📱 Check if the charge saving mode is activated - it can restrict mobile traffic. → Battery. → Savings regime.

If the network icon is there, but the Internet does not work, move to the next step - checking your settings. APN. If there is no sign at all, the problem may be in SIM-map or operator settings (more on this in Section 3).

Check the network icon in the status bar | Make sure In-Air mode is off |Reboot your smartphone | Turn off the charge saving mode-->

2.APN setup: why automatic settings don't always work

Access point APN (Access Point Name is a bridge between your smartphone and the carrier’s network, even if Xiaomi automatically downloads settings when you first install it. SIM-maps, they can get lost after updates or tariff changes. APN manually:

1. Go to Settings. → SIM-maps and mobile networks → [Choose yours. SIM] → Access points (APN).
2. Click Add Access Point (or New APN in older versions of MIUI).
3. Fill in the fields according to your operator's parameters (see the table below).
4. Go back to the APN list and select the profile you just created.

If the APN is not working, try it.

• 🔄 Reboot the smartphone (sometimes the settings are applied only after the reboot).
• 📵 Temporarily shut down SIM-map and put it back in.
• 📞 Call the operator and request to resend automatic settings (usually arrives) SMS configurationally).

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If it's on the list APN You already have a profile with your carrier's name, but the Internet is not working, delete it before you create a new one. APN They can cause conflicts.

3.Problems with SIM-Card: From form factor to lock IMEI

If the mobile Internet is not turned on even after setting up APN, The problem may be in the very SIM-Here are the most common scenarios:

• 🪪 Incompatible form factor: Modern Xiaomi (e.g. Redmi) 13C or POCO F5) Only support nano-SIM. If you use a micro-SIM adapter, the contacts may not fit tightly.
• 🔒 Lockdown IMEI. If the smartphone is purchased abroad or was blacklisted, the operator can block access to the network. IMEI You can visit imei.info.
• 📶 Lack of coverage in some regions 4G/5G It may not be available (e.g. in the subway or remote areas) and check the coverage on your operator's map.

Critical information: If after insertion SIM-Smartphone card requests PUK-- I'm not going to use the code, you can't enter it at random, after 10 wrong attempts, the card will be locked forever. PUK-The code can be found on a plastic carrier SIM or request from the operator.

⚠️ Note: If you use two of these SIM-maps, make sure that mobile data is included for the correct line. MIUI This is set up in Settings. → SIM-maps and mobile networks → Mobile data (select the desired one) SIM).

MTS|Beeline|MegaFon|Tele2.|Yota|Other-->

4.Special settings for different versions of MIUI

The MIUI interface changes with each new version, and the location of mobile Internet options may vary, and the following are the current ways for the most common firmware:

On HyperOS (the new firmware for Xiaomi 14 and other flagships in 2026), the path to settings has become more intuitive, but a new option has appeared, "Intelligent Network Switching," which automatically chooses between 4G and 5G depending on the signal. If you need to force 5G on:

1. Go to Settings → Connections and Sharing → Mobile Network.
2. Select "Network Type" (or "Preferred Network Type").
3. Install "5G/4G/3G/2G" (auto) or "5G only" (if available).

5. Additional parameters: traffic savings, VPN and roaming

Even if the mobile Internet is turned on, it can be blocked by additional settings. Let's consider three key Scenarios:

🔋 Traffic savings and background data

MIUI has a hidden feature called Background Traffic Restriction, which by default shuts down the Internet for applications in the background to turn it off:

1. Go to Settings → Connections and Sharing → Data Use.
2. Click on "Mobile Data" → "Background Traffic Restrictions".
3. Turn off the switch for problematic apps (like WhatsApp or Telegram).

🌍 Roaming: Why the Internet does not work abroad

If you are traveling, make sure that:

• 📱 Data roaming enabled (Settings) → SIM-map → Data roaming).
• 💳 The tariff supports roaming (check with the operator).
• 🔄 Reboot your smartphone after crossing the border – sometimes the network connects only after a reboot.

🔒 VPN firewalls

Some apps (such as AdGuard or 1.1.1.1) can block mobile traffic via VPN.

• Turn off the VPN in the status bar.
• Go to Settings → Apps → Permissions Management → Special Access → VPN and delete unnecessary profiles.

⚠️ Note: If you are using a corporate VPN (For example, for work, its settings may conflict with the mobile Internet, in which case, try connecting to Wi-Fi and updating the configuration. VPN administrator.

6. Troubleshooting Diagnostics: From Simple Tests to Resetting

If none of the previous methods worked, it's time for a deep diagnosis, starting with the fastest tests.

• 📡 Signal check: Enter in the dialer number ##4636## → "Phone information" → Check the signal level (should be higher) -100 dBm).
• 🔄 Manual Network Search: Settings → SIM-map → Networking → Choose your operator manually.
• 📲 Test on another device: Insert SIM-If the Internet is working, your Xiaomi is a problem.

If the basic tests fail, try more radical measures:

1. Reset Network settings (does not delete application data): Settings → About Phone → Settings Reset → Resetting Wi-Fi, Mobile Network and Bluetooth settings
2. Update firmware: Go to Settings → About Phone → System Update and install the latest version of MIUI/HyperOS.
3. IMEI Check: Enter *#06# – if zeros are displayed instead of a 15-digit code, the IMEI is shot down (restore via the Mi Flash Tool is required).

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If the mobile Internet started after resetting, but then disappeared again, the problem is most likely in the conflicting application. Try uninstalling newly installed programs or performing a factory reset.

7. Frequent errors and their solutions

Below we have collected typical error messages and ways to fix them:

If your error is not listed in the table, try:

• 🔍 Search for a solution by Google error code (e.g., "Xiaomi error com.android.phone").
• 📥 Install a network diagnostic application, such as NetMonster or Network Signal Info.
• 🛠️ Contact the service center if you suspect a hardware malfunction (for example, after a smartphone crash).

FAQ: Answers to popular questions