How to choose which one SIM-Call cards on Xiaomi smartphone: all ways

Why choose? SIM-Xiaomi Call Cards Are Not a Trivial Task

Xiaomi’s modern smartphones support two SIM-And the problem is that you can use these cards simultaneously, but not all users know how to manage outgoing calls correctly. SIM It's used for the Internet, and the other for calls, or when the rates on different maps are very different, and the wrong settings can lead to unexpected costs, poor communication quality, or even the loss of important calls.

In this article, we will analyze all possible scenarios: from the base shift. SIM for calls to fine-tune priorities depending on contacts, geolocation or network type (4G VoLTE, 5G). We will pay special attention to models with hybrid slots (for example, Redmi Note 12 Pro).+ or POCO F5), wherein SIM It might conflict with a microSD card, and we'll also uncover little-known chips. MIUI, which will help automate the choice SIM manually switched every time.

If you have ever faced a situation where the smartphone persistently rings with the wrong one SIM, Or you don't understand why the calls are made over the mobile Internet instead of the cellular network -- this guide is for you. MIUI 14/15 (including global and Chinese versions, and also take into account the features of new models 2026 years, such as Xiaomi 14 Ultra or Redmi Turbo 3.

Basic methods of selection SIM-call-card

Let’s start with the simplest: how to manually specify which one SIM This method works on all Xiaomi smartphones, regardless of the version. MIUI The key is to have at least one active device installed. SIM-map.

In most cases, the choice SIM It happens immediately at the time of dialing the number:

1. Open the phone application (pipe icon).
2. Enter a number or select a contact.
3. Click on the icon. SIM-cards next to the call button (usually displayed as two cross-cutting cards).
4. Choose the right one. SIM from the list, for example, SIM 1 (MTS) or SIM 2 (Tele2)).
5. Click on the green phone to make the call.

If the icon SIM It doesn't show, so you've got automatic selection enabled in the settings (as we'll talk about below, POCO X6 Pro) priority may be given SIM for all calls:

1. Go to Settings. → SIM-maps and mobile networks.
2. Select Settings SIM-call-card.
3. Please indicate preferred SIM in the Outgoing Calls section.

Note: If you choose to Ask Each Time, the smartphone will offer a choice. SIM This is convenient if you switch between cards frequently, but can be annoying with frequent outgoing calls.

Automatic choice SIM: contacting and operator setting

One of the most useful functions MIUI It is possible to link a specific SIM-It eliminates the need to choose a map to a particular contact. SIM For example, you can set up all calls to work with a corporate phone. SIM, And personal, personal.

To set up automatic selection SIM contact-wise:

1. Open the Contacts app.
2. Select the contact you need and click Edit.
3. Scroll down to the default field for calls.
4. Choose what you want. SIM-drop-down.
5. Save the changes.

In addition, Xiaomi has a smart switching feature. SIM depending on the availability of the network, for example, if one of the SIM If you don't catch the network, the smartphone will automatically redirect the call to the second card:

1. Go to Settings. → SIM-maps and mobile networks → Additional settings.
2. Activate the switch Automatic switching SIM call-in.
3. Give priority. SIM In case both cards are available.

Important: this feature does not work on all models and may conflict with some operators (for example, MegaFon sometimes blocks automatic switching).

Tie it down. SIM key-contact|Check for VoLTE support on both SIM|Turn off automatic switching when problems occur|Prioritize SIM roaming|Testing calls after changes-->

Features of working with VoLTE and 5G: How does that affect choice? SIM

If your Xiaomi smartphone supports VoLTE (voices through) 4G) or 5G, choice SIM And the thing is, not all operators are as good at this technology, and the wrong settings can cause calls to stop or you can't make an outbound call.

Here are the key points to consider:

• 📶 VoLTE should be on the SIM-If it's disabled, the calls will go through outdated networks. 2G/3G, This can be used to check the status at Settings. → SIM-maps and mobile networks → [choose SIM] → Enable VoLTE.
• 🌐 On some models (e.g. Xiaomi) 13T) 5G And VoLTE doesn't work at the same time. SIM. If you use 5G On one card, the second may lose the ability to call VoLTE.
• 🔄 After the update MIUI lost VoLTE, try resetting the network settings: Settings → SIM-maps and mobile networks → Resetting mobile network settings.
• 📱 On hybrid models (where the second slot is combined with microSD), VoLTE can only work on the first one. SIM. This is a hardware limitation and cannot be circumvented by software.

Also, consider that some carriers (e.g. Yota or virtual carriers like Tinkoff Mobile) do not support VoLTE at all rates.

⚠️ Warning: If VoLTE activated and calls stopped or didn’t reach the subscriber, check if Wi-Fi Calling is enabled. MIUI.

Saving money: how to choose SIM fare-calling

If you're fitted SIM-You can have a big impact on your costs, like one operator can have cheap calls to their local area, and another operator can have a great deal of good rates for long-distance or international calls.

Here are some strategies to optimize costs:

• 💰 Rate analysis: Compare the cost of a minute of conversation on each SIM. Tele2, for example, often has cheaper calls within the network, and Beeline – to other operators.
• 🌍 International calls: If you make frequent calls abroad, check if your carrier is blocking international destinations at this rate. SIM (For example, MTS requires the connection of an additional option.
• 📊 Call statistics: B MIUI You have a built-in traffic and minutes meter. Check it in Settings. → SIM-maps and mobile networks → Using a mobile network to understand what SIM "eat more money.
• 🔄 Roaming: If you travel frequently, set a priority SIM for roaming in Settings → SIM-maps and mobile networks → Roaming: Some operators (e.g. MegaFon) offer special rates for roaming.

Also, pay attention to the minute packets. SIM If you're connected to unlimited calls and you're connected to minute payments, it makes sense to prioritize the first card for outgoings:

1. Dial it. USSD-your operator's command (for example *100# for MTS or *105# for Beeline).
2. Or use the official operator application (for example, My MTS or Tele2.My).

⚠️ Note: If you are using a virtual SIM (eSIM) along with the physical, note that on some Xiaomi models (e.g. Xiaomi 13 Lite), eSIM calls may be charged differently than from a physical card.

💡

If you have a tariff with unlimited calls to your operator’s numbers, save the frequently dialed numbers in contacts indicating this. SIM This way you avoid random calls from a paid card.

Problems and Mistakes in Choosing SIM call-in

Even after setting up correctly, you may encounter problems when your smartphone doesn’t give you a choice. SIM If you're calling or you're persistently using the wrong card, let's look at some of the most common mistakes and their solutions.

Problem 1: The selection window does not appear at the time of the call. SIM, The settings say, “Request every time".

• 🔧 Solution: Check if the default call app is installed (e.g. Google Phone instead of the standard Xiaomi Phone). → Annexes → Default applications → Phone.
• 🔄 Solution: Reset the settings of the Phone application in Settings → Annexes → Application management → Phone. → Warehouse → Reset.

Problem 2: Calls only come with one. SIM, even if the other one is chosen.

• 📡 Solution: Check if the second one is off. SIM In the settings. Go to the settings. → SIM-Maps and mobile networks and make sure both cards are active.
• 🔋 Solution: If the problem has occurred after the update MIUI, Try to clear the system cache: Settings → The phone. → Memory. → Clear the cache.

Problem 3: When you call one SIM Mobile Internet is dropped on the second.

• 🌐 Solution: This is normal behavior for most Xiaomi smartphones with two SIM. When you call from one card, the other card temporarily disconnects from the network. SIM for calls and the Internet.
• 📶 Solution: On some models (e.g. Xiaomi) 11T Pro) dual connection may be enabled 4G customized SIM, But it reduces battery life.

If none of the solutions worked, try resetting your network settings (not to be confused with a full phone reset!):

Settings → SIM-cards and mobile networks → Resetting mobile network settings

Hidden functions MIUI steer SIM-map

In addition to the standard settings, in the firmware MIUI There are a few hidden features that will help you manage your choices more flexibly. SIM These options are not always obvious, but can significantly improve the experience of using.

1. Quick switching SIM via the notification panel

On most Xiaomi models, you can add a shortcut to switch SIM down-curtain notifications:

1. Swipe down to open the notification panel.
2. Click on the pencil icon (or "Edit").
3. Find the tile. SIM-Map and drag it to the active area.
4. You can quickly change your priority. SIM for calls without going into settings.

Automatic switching SIM geolocationally

Smart Switching Function SIM (Not available on all models, but allows you to automatically choose SIM Depending on your location, for example, you'll be using a corporate office. SIM, It's personal at home. It's customized:

1. Go to Settings. → Special facilities → Smart functions → Smart switching SIM.
2. Add a rule by specifying the location (e.g., "Office") and the desired SIM.
3. Save the settings and turn on the function.

3. Voice assistant for selection SIM

If you have Google Assistant or XiaoAI enabled, you can manage the SIM-I mean, I'm talking to you in voice:

• Say, OK, Google, call your mom with a SIM 1".
• Or, "XiaoAI, use the second one. SIM next-time".

To do this, pre-configure the voice assistant in Settings. → Voice assistant.

4.Tune in. SIM for specific types of calls

In some versions MIUI (For example, on Xiaomi 14 you can specify which one is the best. SIM should be used:

• 📞 Just calling;
• 📞 Video calls;
• 📞 Calls via Wi-Fi (Wi-Fi Calling).

These settings are in the Settings → SIM-maps and mobile networks → Call settings.

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If your Xiaomi smartphone doesn’t support VoLTE on the second SIM, But you have to call from it, disable VoLTE on the first card, and that will force the phone to use the standard network. 2G/3G both SIM, It can also impair the quality of communication.

FAQ: Frequent Choice Questions SIM for Xiaomi calls