How to set up two SIM-Xiaomi Smartphone Maps: A Complete Guide to 2026

Use of the two SIM-Xiaomi's smartphone cards are not just a convenience, they're often a necessity: one number for work, another for personal calls, one SIM for local rates, another for roaming. But even experienced users face the nuances of why they don't catch the network on second. SIM, How to divide traffic between cards or why calls only go through the main SIM. SIM Xiaomi – from basic activation to fine parameters in MIUI hyperos.

It's important to understand that the functionality depends on the model of the smartphone. 13/14 Redmi Note 12 Supporting Dual SIM Dual Standby (DSDS), When both cards are active at the same time, but budget models can work in Dual mode SIM Single Standby (DSSS) — When the second SIM switches off when the first SIM calls, we'll take these features into account and show you how to check your model's support.

Also in this article you will find solutions to typical problems: why the second problem is not defined. SIM, How to reset your network if your signal is missing, and what to do if your smartphone doesn't see one of the cards after you update your firmware.

1. Does your Xiaomi support two? SIM-map?

Before trying to set up two SIM, Make sure your Xiaomi model supports this feature at all.Most of the brand's modern smartphones come with two slots, but there are nuances:

• 📱 Flagship models (Xiaomi) 12/13/14, Mix Fold, Black Shark: Dual Support SIM Dual Standby (DSDS) — Both cards are active at the same time, you can call and receive data on any of them.
• 💰 Mid-segment (Redmi Note) 11/12, POCO X5): usually DSDS, But there may be no support. 5G second SIM.
• 🪙 Budget models (Redmi) A2, POCO C55): They often work in Dual mode. SIM Single Standby (DSSS) — The second SIM is turned off during the first call.
• 🔄 Hybrid Slots: Some Models (Redmi) 9A, POCO M3) slot SIM + microSD or SIM + SIM — You have to choose between a second SIM card and a memory card.

Check the support of two SIM possible:

1. In the characteristics of the model on the official website of Xiaomi (section "Network").
2. In the settings of the smartphone: go to Settings → The phone. → Characteristics of the device → Status SIM-map.
3. Physically: Look at the tray for SIM — If there are two connectors under the nano-SIM, then there is support.

⚠️ Note: On some models (Xiaomi) 11T Pro, Redmi K50) second-second SIM may not support 5G — Even if the main SIM is running on a fifth-generation network, it's a hardware limitation, and you can't fix it software-wise.

Installation and activation of the second SIM-map

If your Xiaomi supports two of your SIM, It's up to you to install and activate them correctly:

1. Turn off your smartphone. It's a hot replacement. SIM It can cause a modem malfunction.
2. Remove the tray for SIM. Use a paper clip or a special key (comes with it). On some models (Xiaomi) 12S Ultra is located at the bottom, on the other (Redmi Note 10) - on the left.
3. Install. SIM-Pay attention to the position of the chip, it should be downwards. If you use a hybrid slot, select priority: SIM memory-card.
4. Turn on the phone. Once booted, the system automatically detects new ones. SIM-map.

If, after inclusion, one of the SIM not determined:

• 🔄 Reboot your smartphone.
• 📶 Check if the card is inserted correctly (the chip must touch the contacts).
• 📱 Make sure that SIM-card is active with the operator (not blocked, not expired).
• 🔧 Go to Settings. → SIM-maps and mobile networks → Name. SIM-maps and click on inactive SIM, update.

On some models (Xiaomi 13 Pro, Redmi) K60) after installation of the second SIM You may receive a notification of priority SIM for calls SMS. If not, set it up manually (more on this in the next section).

Setting priorities: calls, SMS and mobile Internet

After activating both SIM You need to set which one will be used by default for calls, SMS And mobile Internet. It's done in the Settings menu. → SIM-maps and mobile networks.

Here are the key parameters:

To change the settings:

1. Go to Settings. → SIM-maps and mobile networks.
2. Select the default call (or similar).
3. Please indicate preferred SIM-map for each type of connection.
4. Save the changes.

⚠️ Note: On Xiaomi with HyperOS (e.g. Xiaomi 14), the menu may look different: Settings → Connections → SIM-maps and mobile networks → Settings SIM-If you don't find the right item, search by settings (the magnifying glass icon at the top).

If you need to switch between SIM When calling, use the context menu: when dialing, click on the icon SIM Next to the call button and select the desired card.

4.Sharing mobile traffic between SIM-map

One of the most useful features on Xiaomi is the ability to flexibly manage mobile Internet on two different platforms. SIM. For example, you can:

• 🌐 Use the basic SIM The second one is for the internet and the second one is for calls only.
• 🔄 Automatically switch to second SIM, if the first one is not on the network.
• 📶 Sharing traffic between cards (for example, one for social networks, the other for work).

To set up traffic separation:

1. Go to Settings. → SIM-maps and mobile networks → Mobile data.
2. Select Data Transfer Settings (or HyperOS Data Mode).
3. Activate the option to use mobile data for the desired SIM.
4. If the Automatic data switching option is available, turn it on - the smartphone will switch to the second one. SIM, if there's no signal on the first.

On some firmware (MIUI 13+) There is a dual network connection (Dual) function. 4G). She lets both of them. SIM connect simultaneously 4G-It's a big network, but it's a big battery drain:

→ SIM-maps and mobile networks → Additional settings → Dual 4G

On models with support 5G (for example, Xiaomi 13T) duality 4G It can interfere with fifth-generation networks, if it disappears after activation. 5G, Turn off the Dual 4G or use 5G only one SIM.

5. Solving problems with the second SIM-card

Even after the correct setup, the second SIM It can work in an unstable way. Here are the typical problems and their solutions:

🔴 Problem Two: SIM not determined

• 🔄 Reboot your smartphone.
• 📶 Remove and re-insert SIM-map.
• 🔧 Reset network settings: Settings → SIM-maps and mobile networks → Resetting network settings.
• 📱 Check it out. SIM In another phone, if it doesn’t work, the operator has a problem.

🟡 Problem: No network on the second SIM

• 📡 Make sure that the flight mode is not on for both SIM (Sometimes it is activated selectively).
• 🔄 Manually select the network: Settings → SIM-maps and mobile networks → [choose SIM] → Choice of network → Handheld.
• 📶 Check the coverage of the operator in your area (possibly the second one) SIM operates in a different range).

🟢 Problem: Calls only go through the main SIM

• 📞 Check the default call settings (Article 3 section).
• 🔧 Some firmware has the option to Always Ask – Turn it on to select. SIM every time.
• 📱 Update the firmware: in older versions MIUI There were bugs with call routing.

⚠️ Attention: If the second SIM If you have stopped working after the firmware update, try to roll back to the previous version or wait for the patch. POCO X3 prior MIUI 14.

If none of these methods helped, the problem may be IMEI second SIM. You can check it out by team:

*#06#

If not IMEI display zeros or "Unknown", require recovery (this is a separate topic not related to settings) SIM).

6. Optimization of battery consumption when using two SIM

Two active SIM-This card increases the load on the modem, which can reduce battery life by 10 to 15 percent:

• 🔋 Turn off Dual. 4G, If you don’t use the internet for both of them SIM simultaneously.
• 📶 Enable Power Saving Mode for Mobile Data: Settings → Battery → Energy saving regime → Limit background activity.
• 🔄 Use automatic data switching only when necessary.
• 📵 Turn off mobile data on the second SIM, If you only need it for calls.

On HyperOS (for example, on Xiaomi 14) there is an additional option Smart Switching. SIM. It analyzes the quality of the network and automatically selects the best one. SIM for calls and the Internet. To turn it on:

→ Connections → SIM- Maps and Mobile Networks → Smart Switching SIM

If you are critically important work time, consider the option of one physical SIM and eSIM (on supported models). SIM It consumes less energy because it does not require a hardware slot.

💡

Xiaomi 13 Ultra and Redmi models K60 Pro can be turned off network search for the second SIM Standby mode. Go to Settings for that. → SIM-maps and mobile networks → [choose SIM] → Network search in the background → It'll save you up to 5 percent of your charge a day.

7.Use of eSIM together with physical SIM

Modern flagships Xiaomi (Xiaomi 13, Xiaomi 14, Mix Fold 3) support eSIM – virtual SIM-It's a card that you don't have to physically insert:

• 🌍 Travel frequently and use local fares.
• 💼 You want to separate work and personal numbers without a second physical slot.
• 🔄 Quickly switch between operators (e.g. for coverage testing).

To set up eSIM on Xiaomi:

1. Make sure that your operator supports eSIM (in Russia – MTS, Beeline, Tele2; abroad – most providers).
2. Get it. QR-eSIM code or activation code for the operator.
3. Go to Settings. → SIM-maps and mobile networks → Add a mobile network → Scan. QR-eSIM.
4. Scan the code or enter the data manually.
5. Set priorities for eSIM (similar to physical) SIM).

The advantages of eSIM:

• ✅ There is no risk of physical damage. SIM.
• ✅ Quick switching between operators.
• ✅ You can store multiple eSIM profiles and activate them as needed.

⚠️ Note: On Xiaomi, HyperOS eSIM may conflict with some banking applications (e.g. SberBank Online or Tinkoff).If payments have stopped working after setting up eSIM, try disabling virtual banking applications. SIM update applications.

8 Special functions for two SIM Xiaomi

Besides the basic settings, MIUI HyperOS offers additional features to work with two SIM:

On HyperOS appeared the function of Intelligent choice SIM, It analyzes your habits and automatically suggests the best way to do it. SIM For phone calls or the Internet, for example, if you call more often from the first one. SIM On weekdays, and on the second weekend, the system will prompt the right choice.

To turn it on:

→ Connections → SIM- Maps and Mobile Networks → Intelligent Selection SIM

💡

On models with HyperOS (for example, Xiaomi 14) appeared the function "Separate sound profiles" - you can adjust individual ringing melodies, vibration and volume for each SIM. This is useful if you want to distinguish between personal and work calls.

FAQ: Frequent questions about two SIM Xiaomi