How to switch mobile internet to another SIM-Map in Xiaomi: The Complete Guide

Switching the mobile internet between SIM-Xiaomi seems to be a simple task, but often raises questions among users, especially if we are talking about models with support for two Sims (Dual). SIM), where the system can automatically select the network or ignore the user's settings. In this article, we will discuss all the ways to manually and automatically switch, including hidden settings. MIUI, We also solve typical problems, from the absence of 4G before the conflicts between operators.

It is important to understand that the algorithm depends on the firmware version (MIUI 12/13/14 HyperOS, or smartphone models (e.g. Redmi Note) 12 Pro+ behaves differently than POCO X5) We're going to look at universal methods that work on the Internet. 90% And if you're faced with a situation where the Internet jumps between SIMs, or one of them doesn't catch the network at all, here's the solution.

Why Xiaomi is automatically switching the internet between SIM-map?

By default, Xiaomi smartphones set the priority of mobile data on the principle of “which SIM catches better.” This is implemented through the Smart Dual function. SIM (In the new versions - Dual SIM Optimization, which analyzes the:

• 📶 Signal level (dBm) of each SIM-maps in real time.
• 🌐 Type of network: preference is given 5G → 4G+ → 4G → 3G.
• 🔄 Application activity: if one of them is tied to a specific SIM (for example, WhatsApp), the system can assign the Internet to it.
• 💰 Operator tariff: if one SIM has run out of traffic, the smartphone will try to switch to the second.

In theory, this is convenient, but in practice it leads to problems:

• ⚡ The Internet can disappear for 5-10 seconds when switching, which is critical for online games or video calls.
• 📱 Some models (Redmi) 10A, POCO M4 Pro) “Forget” priority settings after reboot.
• 🔧 Operators like Tele2 or Iota conflict with the algorithms Xiaomi, which is why the network “hangs».

To disable automatic switching, you need to manually prioritize the SIM – more on that.

How to choose manually SIM-mobile-internet

The most reliable way is to prioritize settings. MIUI 12-14 and HyperOS:

1. Open the Settings. → SIM-maps and mobile networks.
2. Tap on the item Mobile Internet (or Data Transfer in older versions).
3. Choose the right one. SIM-If you do not have an option, see the section "What to do if there is no item "Mobile Internet“».
4. Activate the switch Always use this one. SIM-Card (in HyperOS - Prohibit automatic switching).

After that, the smartphone will only use the selected SIM for the Internet, even if the signal on it is weaker, and for the changes to take effect, you may need to:

• 🔄 Reboot your phone (required for Redmi) 9A and POCO X3 NFC).
• 📶 Turn on/off flight mode for 10 seconds.
• 🔧 Reset network settings (Settings) → Memory and network → Resetting the network).

Important: On some firmware (for example, MIUI Global 13.0.4 for Xiaomi 11T Pro) after manually selecting the SIM, the system can still switch at a weak signal, in which case disabling the Dual function will help. SIM Optimization:

1. Go to Settings. → Special facilities → Full settings.
2. Find the Dual section SIM Turn off the option of Dual Optimization. SIM.
3. Save the changes and restart the device.

Set Network Priority for Specific Applications

If you want certain apps (such as Telegram or Google Maps) to always use one SIM and others use another, use the “Back” feature. SIM-App maps. It's available on most Xiaomi devices with MIUI 12+:

1. Open the Settings. → SIM-maps and mobile networks → Tethering SIM-annex-card.
2. Select the app from the list (if there is none, tap Add the app).
3. Please indicate which one SIM-The card should be used for Internet and calls.

Limitations of function:

• 🚫 Does not work with system services (e.g. Google Play Services).
• 🔄 When updating the application, the settings may reset.
• 📱 Nana POCO F3 Xiaomi 12 Lite feature may not be available due to regional firmware restrictions.

If the application you want isn’t on the list, try an alternative method through Dual App Mode:

1. Create a duplicate of the application (Settings) → Annexes → Dual App).
2. For the duplicate manually select another SIM-map.

💡

If the binding SIM The application is not saved, check if it blocks the antivirus (for example, Avast or 360 Security.

What to do if the settings do not have the item "Mobile Internet"

On some models (Redmi) 8A, POCO M2 Pro) or custom firmware section for selection SIM-The card may not be available. In this case, try the following methods:

Method 1: Engineering menu (for advanced users)

Warning: Incorrect actions in the engineering menu can disrupt the network!

1. Open the Phone app and type ##4636##.
2. Go to the phone information section.
3. At the bottom of the screen, find the drop-down list of Set preferred network type.
4. Choose the right one. SIM-map, SIM 1 SIM 2) and specify the type of network (LTE only 4G).

Method 2: Through USSD-operator

Some operators allow you to link the Internet to SIM-map USSD-request:

Attention: USSD-commands don't guarantee Internet switching at the phone level - they only adjust the operator's fare. Use the engineering menu or reset the network settings for full control.

Method 3: Resetting network settings

If menu items disappear after updating the firmware, resetting:

1. Go to Settings. → Memory and network → Reset Wi-Fi, mobile network and Bluetooth.
2. Confirm the reset (no password required).
3. After restarting, check the availability of the mobile Internet.

How to switch the internet between SIM-maps without resetting

If you need to quickly change your SIM for the Internet without rebooting, use one of these methods:

Method 1: Through the notification panel

On most devices, Xiaomi can be quickly changed. SIM-data-card:

1. Swipe down from the top edge of the screen to open the notification bar.
2. Hold your finger on the Mobile Data (or Internet) icon.
3. In the window open, tap the name of the current SIM-cards and choose another.

Method 2: Using the Mobile Data widget

Add the widget to the main screen:

1. Click and hold the empty space on the home screen → Widgets.
2. Find the Mobile Data Widget (or Dual) SIM) And drag it on the screen.
3. Slip on the widget to open the selection menu SIM-map.

Method 3: Google Assistant Voice Assistant

If you have Google Assistant setup, say:

• «Okay, Google, turn on the mobile internet SIM 1»;
• “OK, Google, use MegaFon for the Internet” (if the SIMs are signed by the names of the operators).

Note: Voice commands don’t work on all models – check for support in Settings → Google → Settings for Assistant → Teams.

Solving problems: the Internet does not switch or disappears

After the shift SIM-The internet is not working, check the following points:

If the problem persists, make a diagnosis:

1. Check if your model supports Dual VoLTE (the list of supported devices is available on the Xiaomi website). Without this feature, one of the Sims will not be able to work simultaneously with the same device. 4G and call.
2. Update your firmware to the latest version (Settings → About Phone → System Update).
3. Remove third-party network management applications (such as Network Signal Guru) that may conflict with system settings.

💡

On devices without Dual VoLTE support (e.g. Redmi) 9C) When an active call is made on one SIM, the second automatically switches to the 2G, Which leads to the Internet's downfall.

Features of switching on specific Xiaomi models

Some Xiaomi smartphones have unique nuances when working with two SIM-Let's look at the most popular models:

Redmi Note 11 Pro / Pro+

On these devices, the Dual function 5G It only works when using two nano-SIMs. if one of the sims is installed in a hybrid slot (along with a memory card), 5G It's only going to be available on the first SIM:

• Use two nano-SIMs without a memory card.
• Update the firmware to MIUI 14+ — In the old versions, there was a priority error. 5G.

POCO F4 / F4 GT

These models have the default option of Intelligent Network Switch, which ignores manual settings, to turn it off:

1. Go to Settings. → SIM-maps and mobile networks → Intelligent network switching.
2. Turn off the function and confirm the action.

Xiaomi 13 / 13 Pro (on HyperOS)

HyperOS has changed the network settings menu to change the settings. SIM-map:

1. Open the Settings. → Mobile network.
2. Slip the cog icon next to the name of the Simki.
3. Choose Use for Mobile Data.

Redmi A1 / A2 (budgetary models)

These phones don't have Dual VoLTE, so if you call on one SIM, the second one shuts down the Internet completely.

• Use one SIM for calls, the second for the Internet.
• Activate Wi-Fi Calling (if supported by the operator) so that calls go through Wi-Fi, and the Internet remains on the second SIM.

FAQ: Frequent questions about switching the Internet to Xiaomi