How to choose SIM-Default card on Xiaomi: all ways

Xiaomi’s modern smartphones support two SIM-cards, but often users are faced with the problem: how to make one of the SIMs the main for calls, mobile Internet or mobile Internet. SMS? By default, the system can automatically select the network for outbound calls or data transfers, which is not always convenient – especially if you have different rates on each SIM.

In this article, we will discuss all possible ways of appointment. SIM-Default cards on Xiaomi, Redmi and POCO, including models with MIUI 12/13/14 You will learn how to configure a priority SIM for calls, mobile Internet and messages, and what to do if the desired options are not displayed on the menu.

Why it's important to set up SIM-default-card

Without proper configuration of the main SIM-You may encounter a number of inconveniences:

• 📞 Outgoing calls always go through the wrong SIM, which is why money is written off from the wrong account.
• 🌐 Mobile Internet automatically connects to the network with a more expensive tariff.
• 💬 SMS-messages leave through the SIM, which ran out of funds or blocked the message service.
• ⚡ Fast battery drain if both SIMs are actively scanning the network at the same time.

For example, if you have one SIM for work (with unlimited calls), and the second for personal needs (with cheap Internet), then without the right settings you will overpay for services. Also, some messengers (such as WhatsApp or Telegram) are tied to a phone number, and if the main SIM is chosen incorrectly, you will not be able to get the phone number. SMS confirmation-coded.

How to check which one SIM-card is used by default

Before you change your settings, make sure you correctly identify the current main SIM.

1. Open the Phone app and dial the combination ##4636##.
2. In the menu that appears, select Phone Information.
3. Look at the line My phone number – here will be displayed the number of the SIM that is used for outgoing calls by default.

You can also check the current settings manually:

1. Go to Settings. → SIM-maps and mobile networks.
2. Tap on the Settings item SIM-maps (in some versions) MIUI This section may be called the Office of SIM-map).
3. Here you will see two SIMs (e.g. SIM 1 and SIM 2) indicating which one is used for calls, SMS and mobile internet.

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If you have Xiaomi with HyperOS, the path to settings may be different: Settings → Connections and sharing → SIM-maps and mobile networks.

Method 1: Configure through the menu SIM-maps (main method)

It’s the easiest and most versatile way to work on all of Xiaomi’s current smartphones, including the Redmi Note 12, POCO X5, Xiaomi 13 and other models. Instructions are relevant for the MIUI 12-14 and HyperOS.

Follow the step-by-step instructions:

1. Open Settings (the gear icon on the home screen or in the application menu).
2. Go to section. SIM-Maps and mobile networks (HyperOS may refer to Connections and Sharing) → SIM-map).
3. Tap on the Settings item SIM-maps (or Management) SIM-map).
4. You'll see two SIMs with their numbers (if the numbers don't show, they can be hidden by the operator).
5. Activate the switches opposite: 📞 Calls - for outgoing calls; 💬 SMS — message-post; 🌐 Mobile data – for access to the Internet.

MIUI

The correct SIM for calls |

Selected the right SIM for SMS|

The correct SIM for mobile Internet |

Rebooted smartphone (recommended for application of changes)-->

If you change your settings, if you still have calls or Internet access through another SIM, try restarting your device, and sometimes the changes only take effect after the reboot.

Method 2: Use the engineering menu (#4636##)

If the standard settings are not working or missing, you can use the engineering menu, which is suitable for advanced users and requires caution - do not change other settings so as not to disrupt the network.

Instructions:

1. Open the Phone app and enter the combination ##4636##.
2. In the menu that appears, select Phone Information (or Phone Information in English firmware).
3. Scroll down to the Set preferred network type block.
4. Click on the drop-down list and select the desired SIM (for example, SIM 1 or SIM 2).
5. Go back to the main menu of engineering settings and select SIM Management (management) SIM-map).
6. Here you can manually specify which SIM will be used for Voice (calls), SMS and Data (Internet).

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Changes to the engineering menu apply immediately, but may reset after rebooting. Use standard MIUI settings for constant effect.

⚠️ Warning: Do not change other options in the engineering menu unless you are sure of their purpose.This may lead to loss of the network or malfunction of the communication module.

Method 3: Set up for specific contacts

If you need to make sure that some contacts always make calls through a specific SIM (for example, for work – through SIM 1, and for family – through SIM 2), this can be customized individually.

How to do this:

1. Open the Contacts app and select the contact you want.
2. Slip on the editing icon (pencil in the upper right corner).
3. Scroll down to the phone number field and tap it.
4. Choose. SIM-Default card for this contact (or similar item).
5. Please indicate which SIM calls to this number are to be made through.
6. Save the changes.

Now, when you call that contact, the system will automatically use the selected SIM, which is convenient if you have, for example, a work and personal number on the same phone.

Features of working with eSIM on Xiaomi

If your Xiaomi smartphone supports eSIM (such as Xiaomi 13 Pro, Xiaomi 12T or POCO F5), the setting of the main SIM has its own nuances. Unlike physical nano-SIM, the virtual SIM does not have a slot, but its priority can also be changed.

How to make the eSIM the main one:

1. Go to Settings. → SIM-maps and mobile networks → eSIM.
2. Slip on the active eSIM (if there are several, choose the right one).
3. Turn on the options: 📞 Use it for calls; 💬 Use it for SMS; 🌐 Use for mobile data (if necessary).

activated

⚠️ Note: Some operators (e.g. Tele2 or Iota) block the ability to use eSIM for the purpose of using the eSIM. SMS. In this case, you will have to use physical SIM-map.

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To check if your Xiaomi eSIM supports, enter the phone’s IMEI on IMEI.info and look at the specs.

What to do if the settings are not saved

Sometimes users have a problem when they choose SIM-The default card is reset after rebooting or accidentally changes itself:

• 🔄 Work failure MIUI (especially on beta versions of the firmware);
• 📱 Conflict between two sims (for example, if one of them does not support the 4G);
• 🛠️ Incorrect operation of the communication module (less often).

Decisions:

1. Update your firmware to the latest stable version via Settings → About Phone → System Update.
2. Reset network settings: Settings → SIM-maps and mobile networks → Resetting network settings → Resetting This will remove saved Wi-Fi and Bluetooth networks, but can solve the SIM problem.
3. Turn off automatic network selection: Settings → SIM-maps and mobile networks → [Choose. SIM] → Choice of network → Manually select the operator manually.
4. Check the physical condition of the sims: Remove and re-insert SIM-Clean the SIMKI contacts with a stripe or soft cloth. Try to change the SIMKI places (for example, change the SIMKI SIMKIS, SIM 1 insert SIM 2).

If the problem persists, it may be faulty. SIM-In this case, contact the service center.

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On some firmware MIUI Helps disable the dual link function 4G+ (is in the settings SIM-This option may conflict with manual selection of the main SIM.

Additional advice on working with two SIM-map

To make the most of two Sims on Xiaomi, use these tips:

• 🔋 Battery savings: Turn off network search for a second SIM if it's rarely used. → SIM-maps and mobile networks → [Choose. SIM] → Turn on and off the unnecessary SIM.
• 📶 Network Priority: If one SIM supports 5G, And the second one is just 3G, appoint 5G-SIM for mobile Internet to get the maximum speed.
• 🛡️ Security: Set up two-factor authentication (2FA) on both SIMs, if they are linked to important accounts (bank, post, social networks).
• 🔄 Backup: Export contacts and settings periodically SIM-maps through settings → System and device → Backup.

Xiaomi models with Snapdragon processor (e.g. POCO F4, Xiaomi 12S) support Dual SIM Dual Standby (DSDS), which allows both SIMs to remain active at the same time. On devices with a MediaTek processor (e.g. Redmi Note 11), Dual SIM Dual Active (DSDA) can be used, where both SIMs work in real time, but this increases battery consumption.

FAQ: Frequent questions about SIM-maps on Xiaomi