How to put the second in the right way SIM-Map to the smartphone Xiaomi: instructions for all models

Double. SIM-The map in Xiaomi’s smartphone is not just a convenience, but often a necessity for those who share work and personal numbers or travel between countries, but the process of installing a second SIM can raise questions even among experienced users. Differences in tray design, support for nano-SIM and eSIM formats, as well as features of Dual activation SIM firmware MIUI — All this requires a careful approach.

Many Xiaomi owners face typical problems: the phone does not see the second SIM, network conflicts arise or the mobile Internet disappears. SIM In this article, we will take a step-by-step look at how to avoid these complications and successfully activate both SIM cards on your device.

We will focus on models with a hybrid slot, where the second slot is combined with a microSD card connector. Here you will have to choose between additional storage or a second SIM. Also consider the nuances for flagships with eSIM support (for example, Xiaomi 13 Pro or Xiaomi 14), where a physical second SIM may not be necessary at all.

Before you start, check whether your Xiaomi model supports two. SIM-This information is listed in the device specifications on the official website or in the documentation. If you are not sure, use the compatibility table below.

1. How to determine the type SIM-tray in your Xiaomi

The first step is to understand which slot to use. SIM-It's on your smartphone, and that depends on whether you can use two physical SIMs at the same time, or whether you have to choose between a second SIM and a memory card.

Xiaomi has three types of trays:

1. Double. SIM-2 nano-SIM – supports two physical SIM cards at the same time, found in most modern mid-range and premium models (e.g. Redmi Note 12 Pro)+, POCO X5 Pro).
2. Hybrid tray (nano-SIM) + nano-SIM/microSD) — The second slot is combined with a memory card connector, and you have to choose between a second SIM or a memory extension, typical of a budget line (Redmi). 10A, POCO M5).
3. Single tray with eSIM – one physical nano-SIM + Support for virtual eSIM. Relevant for flagships (Xiaomi 13 Ultra, Xiaomi Mix Fold 3).

To find out the type of tray in your device:

1. Turn your smartphone over and look at the left end (usually the tray is located there), and some models have a pictogram indicating the slots.
2. Use a tool to remove the tray (comes with a kit) or a paper clip to gently pull it out. Don't use force - the tray should extend smoothly.
3. Look at the inside of the tray: if there are labels for two nano-SIMs or nano-SIMs + MicroSD is a hybrid variant of the microSD.

⚠️ Note: On eSIM models (e.g. Xiaomi 14), the physical tray can only be for one nano-SIM.

If you are not sure about the type of tray, check the characteristics of your model on the Xiaomi website or in the Settings app. → The phone. → Characteristics. There should be a line like "Dual." SIM" or "Hybrid Dual" SIM".

Preparation SIM-maps: format, cropping, activation

Before installing, make sure your SIM-All modern smartphones of the brand support only the nano-SIM format (4FF). If you have an old-style card (mini-SIM or micro-SIM), it will have to be cropped or replaced in the cabin of the operator.

Important points in the preparation:

• 📱 Check activity SIM-cards: both must be activated by the operator, and if one of the SIMs is new, it must first be registered on the network (usually through the use of a new SIM). USSD-team or operator's office).
• ✂️ Pruning SIM-If you cut the card yourself, use the nano-SIM template and act carefully. The chip damage will cause the SIM to fail.
• 🔄 Operator compatibility: some Xiaomi models (especially for the Chinese market) may not support certain frequencies of Russian operators.
• 📶 4G/5G Support: If you want high internet speeds on both SIMs, make sure the model supports Dual 4G or dual 5G (for example, Xiaomi 12T Otherwise, one of the sims will only work in mode. 2G/3G.

If you use eSIM, it's activated through your phone's settings or your carrier's application, like for MTS, this is My MTS, for Beeline, My Beeline, which usually takes less than 5 minutes and doesn't require you to physically install the chip.

⚠️ Attention: When pruning SIM-If after installation the phone does not see the SIM, check if the contacts in the smartphone slot are bent (carefully put them with a needle if necessary).

For models with hybrid slot (SIM + microSD) remember that if you choose a memory card, the second SIM won't work, and vice versa.Priority is given to the first one installed in the slot.For example, in Redmi Note 11, when you install a microSD in the slot for the second SIM, the phone will automatically disable Dual support. SIM.

Check the format (nano-SIM only)

Activate both SIMs at the operator

Cut the cards if necessary (or replace them)

Make sure that 4G/5G frequencies are compatible

For eSIM: download the operator's application-->

3. Step-by-step instruction: how to insert a second sim

Now, let's get to the point. The manual is suitable for most Xiaomi models, but there may be minor differences depending on the design of the tray.

Step 1. Turn off your smartphone.

It's a must-have! Installation or retrieval SIM-If the card is turned on, it can damage the contacts or the communication module. Wait for the complete shutdown (screen should go out, vibration to go out).

Step 2. Remove the tray for SIM-map.

• Take a paper clip or a special tool from the kit (usually silver colored with a curved end).
• Find on the left end of the smartphone a small hole next to the tray.
• Put the paperclip in the hole and press until you click. The tray will extend a few millimeters - carefully pull it out completely.

Step 3. Set it up. SIM-cardboard.

Pay attention to the position of the chip and tags on the tray:

• For double tray (2 nano-SIM): place the SIMs in the appropriate slots. SIM 1 marked as the primary.
• For hybrid tray: if you choose the second SIM, install it in the slot SIM 2 (usually right). Use a microSD slot for a memory card.

Make sure the cards are chipped down and fit tightly to the contacts.A non-contiguous SIM may not be recognized by the phone.

Step 4, put the tray back in place.

Carefully insert the tray back into the smartphone before the click. Make sure it sits straight -- if the tray is skewed, the SIMs won't come into contact with the connector.

Step 5: Turn on the phone and set up SIM-map.

Once enabled, Xiaomi will automatically identify new SIMs and prompt them to configure.If that doesn't happen, go to Settings → SIM-Maps and mobile networks and manually activate both cards.

⚠️ Note: On some models (e.g, POCO F4 GT) After installing the second simco, it may be necessary to restart for the correct operation of both communication modules.

If the second SIM is not determined after installation, check whether the contacts in the slot are not contaminated (wipe them with a dry cotton swab) and whether the card is properly cropped (the chip should not protrude beyond the edges).

4. Dual setup SIM into MIUI: priorities and modes of work

Successful installation of sims is only half the battle, and in order for both cards to work properly, you need to set them up properly in the system. MIUI. Open the Settings. → SIM-Maps and mobile networks and follow the recommendations.

Purpose of the sims:

You can give each SIM a unique name (e.g., "Worker" and "Personal") and choose a color label for convenience. SMS.

Priority by default:

V MIUI You can specify which SIM will be used by default for:

• 📞 Calls.
• 💬 SMS
• 🌐 Mobile Internet

For example, if you have unlimited rates on the first SIM, choose it for the Internet, and leave the second only for calls.

3. Dual modes of operation SIM:

Depending on the model, Xiaomi supports different modes:

To change the mode, go to Settings → SIM-maps and mobile networks → Mode of work SIM-Note: Budget models may only be available DSDS, where with active Internet on one SIM the second will be unavailable for calls.

4. Setting up mobile Internet:

If you want the internet to work only through one SIM:

1. Go to Settings → SIM-cards and mobile networks → Mobile Internet.
2. Select a SIM for data transfer (for example, SIM 1).
3. Activate the option "Use mobile Internet".

If the internet is not connected, check it out. APN-settings (access points) can be downloaded automatically or entered manually (optimizations are provided by your operator).

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If you have set up the Dual SIM You've lost your mobile Internet, you've got to try to turn off and reset your data mode, or you've got to restart your phone. → SIM-maps and mobile networks → Resetting network settings.

Frequent problems and their solutions

Even with proper installation of segunda SIM-Xiaomi users may face difficulties. Consider typical scenarios and ways to eliminate them.

Problem 1: The phone doesn't see the second SIM

Possible causes and solutions:

• 🔌 Fragile contact: remove the tray and check if the SIM is properly installed.
• 📱 Incompatible format: if the SIM is cut curve, replace it with a new nano-SIM in the cabin of the operator.
• 🔄 Failure in MIUI: Restart your phone or reset your network settings (Settings) → SIM-maps and mobile networks → Resetting network settings).
• 🛠️ Hardware malfunction: If the slot is damaged, contact the service center.

Problem 2: One SIM works, the other does not.

This is often due to the network’s priority:

• Check if the second SIM is disabled in the settings (Settings) → SIM-maps and mobile networks).
• If the first SIM is active, the second can be blocked for calls (in mode). DSDS). Try to disable mobile data on the first SIM.
• Make sure that both SIMs support the same frequencies, for example, if the same SIM is running in the same frequency range. 5G, And the second one is in 2G, There may be conflicts.

Problem 3: Mobile Internet goes missing when using two sims

This is typical of models with DSDS, where only one SIM can use data:

• In the mobile Internet settings, select the SIM that will be used for the default data.
• If you need data on both SIMs, consider using eSIM (if supported).
• Update the firmware MIUI Up to the latest version – new updates often fix Dual errors SIM.

Problem 4: The phone overheats or discharges quickly with two SIMS

Two active SIM-The cards increase the load on the communication module, which can lead to:

• 🔥 Overheating: Turn off background data transfer for one of the SIMs (Settings) → Annexes → Permits → Auto-start).
• 🔋 Quick discharge: activate the power saving mode or turn off the network search for one of the SIMs in roaming.

⚠️ Note: Some Xiaomi models (e.g. Redmi) 9A) when activating the second SIM, VoLTE support may be disabled (voice on the LTE). In this case, the calls will be passed through 3G, which impairs the quality of communication.

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If the second SIM is not detected after all the manipulations, check it on another phone, and if it does not work there, the problem is in the SIM, not in the smartphone.

6. Features for models with eSIM

Xiaomi smartphones premium segment (for example, Xiaomi 13 Pro, Xiaomi 14) support eSIM technology – virtual SIM-This is convenient if you don't want to sacrifice a slot to a memory card or use two physical SIMs.

How to activate eSIM on Xiaomi:

1. Make sure your operator supports eSIM (in Russia it is MTS, Beeline, MegaFon, Tele2).
2. Download the official application of the operator (for example, My MTS or My Beeline).
3. In the app, find the "eSIM" or "Digital" section. SIM" Follow the activation instructions.
4. After receiving QR-code or activation code go to Settings → SIM-maps and mobile networks → Add eSIM.
5. Scan it. QR-code or enter the code manually. Reboot the phone.

The advantages of eSIM:

• 📱 No need for a physical SIM - freed slot for a memory card.
• 🔄 Quick switch between fares (comfortable for travel).
• 🛡️ Less risk of damaging the slot contacts.

Disadvantages:

• 🚫 Not all carriers support eSIM (check in advance).
• 🔄 When resetting the phone to factory settings, the eSIM can be deactivated.
• 📱 You cannot physically remove or transfer the eSIM to another phone (re-activation required).

If your Xiaomi supports both physical nano-SIM and eSIM, you can combine them, such as using a physical SIM for the main number and eSIM for a temporary roaming tariff.

7. Compatibility of Xiaomi models with Dual SIM

Not all Xiaomi smartphones support two-way SIM-Below is the compatibility table for popular models (current for 2026):

If your model is not in the table, check its specifications on the official website or in documents. Please note that some models for the Chinese market may have a different type of slot (for example, only eSIM without physical SIMs).

Also, keep in mind that the silk MIUI impacts the work of Dual SIM. In global versions of firmware (for example, MIUI Global) support for two sims is usually stable, whereas in Chinese (MIUI China may have restrictions (e.g. lack of Russian language or roaming problems).

8. Alternative solutions: if Dual SIM wrong

If your Xiaomi model doesn’t support two of your SIM-cards or you don’t want to sacrifice a slot to a memory card, consider alternative options:

1. Portable Wi-Fi router

If the second SIM is only needed for the Internet, you can use a mobile router (for example, Xiaomi Mi Wi-Fi Router). 4C) fixed SIM-The phone will connect to it via Wi-Fi, and the main SIM will remain free for calls.

Applications for calls by IP

Services like WhatsApp, Telegram or Skype allow you to make calls over the Internet using a virtual number. SIM-Map, but it will save on long-distance calls.

3. Multisim service with the operator

Some operators (for example, MegaFon) offer the service "Multisim", where one number is duplicated by several SIM-So you can use one number on two phones or on a phone and a tablet.

4. Bluetooth headset with SIM-card

A rare but possible solution is headsets with support SIM-maps (for example, Samsung Gear) S3). They allow you to call from the second number, but it is inconvenient for everyday use.

If you need two physical SIMs, and your Xiaomi model does not support this, consider buying a new smartphone with a full Dual. SIM. In the lineup of Xiaomi, this is the majority of models of the mid-range and premium segment (for example, the Redmi Note 13 Pro).+ Xiaomi 14).

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Before buying a new phone, check if it supports the frequencies you need. 4G/5G For example, some models for the European market do not work with Russian operators in the range. 800 MHz.

FAQ: Frequent questions about the second SIM in Xiaomi