How do you do it? SIM-Main map on Xiaomi: full instructions with pictures

Introduction: Why is it necessary SIM-default card on Xiaomi

Modern Xiaomi smartphones (including Redmi models and other models) POCO) Supports the work of two SIM-But without the right setup, you might get into trouble: calls are coming from the wrong SIM, the Internet is coming from the wrong operator, and you're going to be using the wrong operator. SMS They're sent randomly. SIM-The default card solves these problems by determining which SIM the phone will use for outbound calls, messages and mobile traffic unless you manually specify otherwise.

This is especially true for people who use one SIM for work and another for personal use. SIM1 as a primary call to work, and SIM2 — In this article, we'll look at all the ways that you can assign. SIM-Default maps on Xiaomi, including hidden settings MIUI and solutions for specific scenarios (calls, SMS, 4G).

It is important to understand that setting up the main SIM does not block the second card, it just sets priorities. You can choose another SIM for a specific action at any time (for example, when sending an SMS). And if you have Xiaomi with eSIM support (for example, Xiaomi 13 Pro or Xiaomi 14), the instruction will also fit – the setting principles are identical.

Method 1: Appointment SIM-Default cards through basic settings

The easiest method is to use the standard MIUI menu, which works on all Xiaomi, Redmi and POCO smartphones regardless of the firmware version (from MIUI 12 to MIUI 15).

1. Open the Settings app (the gear icon on the desktop).
2. Go to section. SIM-Maps and mobile networks (or Mobile Network on older versions).
3. Tap on point. SIM-Cards (may be called the Office of the SIM-map).
4. Choose. SIM-the card you want to make the main one, and click on Default for calls, Default for SMS and by default for mobile data.

Once you save your settings, check them to make a call or send an SMS without manually selecting a SIM, and if everything is set up correctly, the phone automatically uses the card you select.

Calls leave with the right SIM|SMS go through the main card|Mobile Internet works through the selected operator|Second second SIM-The map remains active for incoming

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Note: on some models (e.g. Redmi Note 12 Pro)+) The menu items may be in a different order. SIM-maps and mobile networks, use the search in the settings (magnifying glass icon in the upper right corner).

Method 2: Quickly switching SIM for calls and SMS

If you need to temporarily change the default SIM (for example, for a single call), you do not need to go to the settings. Xiaomi offers a convenient way to change directly in the phone interface:

• 📞 For calls: open the phone application, dial the number and tap the icon SIM-Select the right SIM, it will only be used for this call.
• 💬 For SMS: in the Messages app, create a new message, enter text and click on the icon SIM-maps in the top panel. Select the operator to send.

This method doesn't change the default settings, but allows you to flexibly manage SIMs in specific situations, which is useful if you often switch between work and personal SIMs.

Once a week | Once a month | Only when you change operator | I never change | I don't know what it is

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In the models with MIUI 14 and newer (e.g. Xiaomi) 13T or POCO F5) In the notification panel can be displayed a quick switch SIM-Swipe down from the top of the screen and find the tile. SIM-Maps – tap on it to select the main SIM for calls and the Internet.

Method 3: Set up mobile internet by default

And the thing that you should be looking at is the default setting of mobile data, and if you have two SIMs with different Internet rates, it's important to choose one that's cheaper or unlimited.

1. Go to Settings. → SIM-maps and mobile networks → Mobile data.
2. Select a point. SIM-mobile data map.
3. Specify the SIM through which the Internet should work by default.
4. Activate the Mobile Data Switch if it is turned off.

Important: If the mobile Internet does not work after changing the default SIM, check APN-settings for the selected operator. On Xiaomi, they are reset when switching between SIMs. To set them, go to Settings. → SIM-maps and mobile networks → [chosen SIM] → Access points (APN) Choose your operator profile (or create a new one manually).

Method 4: Using Dual Apps to Separate Sims by Application

If you need to link specific applications to a specific application SIM-card (for example, WhatsApp for the work SIM, and Telegram for the personal), use the Dual Apps function (Cloning applications) in the MIUI. This option is available on most models, starting with MIUI 10.

Instructions:

1. Open Settings → Applications → Cloning of applications (Dual Apps).
2. Select the app you want to clone (such as WhatsApp).
3. After cloning, open a copy of the application and when registering, specify the phone number with the desired SIM-map.
4. Now the original and cloned applications will use different SIMs.

This method is useful if you want to separate your work and personal accounts from each other on a single smartphone, and note that cloned apps take up extra memory and can slightly increase your battery consumption.

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Features of customization on specific Xiaomi models

Although the general principle of adjustment SIM-Default cards are the same for all Xiaomi devices, some models have nuances:

• 📱 Xiaomi 12/13/14 Series: eSIM support allows you to use the virtual SIM as your primary SIM. To set it up, go to Settings. → SIM-maps and mobile networks → Add eSIM.
• 📱 Redmi Note 10/11/12: These models may not have a fast switch. SIM-maps in the notification panel. Use the basic settings.
• 📱 POCO F3/F4/F5: In the firmware MIUI for POCO Menu items may be called otherwise (e.g. Dual) SIM and the access point instead SIM-maps and mobile networks).
• 📱 Xiaomi Mi A1/A2/A3 (Android One: It uses pure Android, so the way to setup will be Settings → Network and Internet → SIM-map.

If your model doesn't make the list, don't worry, the configuration algorithm remains the same, and the main thing to remember is that menu item names may vary depending on the MIUI version and firmware localization.

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Frequent Mistakes and How to Avoid Them

When you set up SIM-And the default cards are often the ones that people have to deal with, and here are the most common ones and the ways that they can be solved:

⚠️ Note: If after the change of the SIM default stopped coming SMS (For example, from a bank, check if the number is linked to another. SIM-Some services (e.g. Sberbank Online) require re-assignment when changing the main SIM.

• 🔄 Simka not identified: Make sure the card is inserted correctly into the tray (chip down). on Xiaomi models with a hybrid slot (e.g. Redmi 9A) second-second SIM-The card may conflict with the microSD card.
• 📶 No network on one of the sims: Check if your Xiaomi supports carrier frequencies. For example, Redmi Note 9 Pro does not work with VoLTE networks of some virtual carriers.
• 🔋 Fast battery discharge: If both SIM-cards active in mode 4G, The phone uses more power. 4G for the second SIM in the settings of the mobile network.

Another common mistake is not saving the settings after the reboot, which can be due to a MIUI failure.

1. Clear the Settings app cache (Settings → Applications → Application Management → Settings → Clear the cache).
2. Update the firmware to the latest version.
3. If the problem persists, reset your network settings (Settings → About Phone → Resetting → Network Reset).

FAQ: Answers to popular questions