How to turn on the second SIM-Map on Xiaomi: full instructions with photos and tips

Double. SIM-The map in Xiaomi smartphones is not just a convenience, but a necessity for many users, whether it is the separation of work and personal contacts, the use of profitable tariffs of different operators or travel with local SIMs – a Dual function. SIM However, not everyone knows how to properly activate a second SIM, especially if the phone is bought abroad or previously used with a single card.

In this article, we will discuss all the ways to include the second SIM-Maps on Xiaomi devices (including Redmi models, POCO and Black Shark, which works on MIUI 14/15 And the new HyperOS, which is a way to avoid the typical setup errors, what settings to check, and what to do if the phone doesn't see the SIM. 14 Ultra or Redmi Note 13 Pro+ We have prepared separate recommendations for optimizing the work of two cards.

Check the support of Dual SIM with your Xiaomi model

Before you try to activate a second SIM, make sure your smartphone physically supports two. SIM-Even if there are two slots in a phone, it doesn't guarantee Dual's performance. SIM — Some models (e.g. Xiaomi) 13T Pros for the European market can have a hybrid slot, where the second SIM card is replaced by a microSD card.

How to check:

• 🔍 Official website: Find your model on the [mi.com](https://www.mi.com) → section “Specifications» → point «SIM-Look for phrases like Dual. SIM (Nano-SIM, dual stand-by).
• 📱 Visual inspection: Get the tray out for SIM-If there are two independent slots under nano-SIM, Dual support SIM If one nest is combined (SIM + microSD - you have to choose.
• 🛠️ Service tags: On the box or under the battery (for collapsible models) look for the inscription 2 SIM or DSDS (Dual SIM Dual Standby).

Special attention to owners of the POCO F5 and Xiaomi 12S Ultra: these models in some regions are sold with one physical slot, but support eSIM as a second SIM. If you have one, go to the section about setting up an electronic SIM.

⚠️ Note: Models for the Chinese market (noted) CN In the title, they often don’t support Dual. SIM outside China due to operator restrictions!

Installation of the second SIM-maps: step-by-step instructions

If your Xiaomi supports two physical SIM-For models with eSIM (such as Xiaomi 13 Lite), skip this section and read on.

Turn off your phone (required!)

Check the SIM type (Nano-SIM only!)

Clean the SIMKA contacts with a dry napkin

Prepare a paper clip to extract the tray

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Step 1: Removing the tray

Insert a paper clip (or a special key from the kit) into the hole on the side panel of the phone. Push until you click, the tray will extend. Gently pull it out without touching the metal contacts.

Step 2. Installation SIM-map

• 📇 Put the first SIM in the slot SIM 1 (usually marked with a number or letter A).
• 📇 Set the second SIM in the slot SIM 2 (marked by the number 2 or the letter B).
• ⚠️ Important: If the slot is hybrid, select the priority of the second SIM or memory card!

Step 3: Return of the tray

Carefully insert the tray back into the phone before the click. Make sure it sits flat - skewedness can lead to poor contact.

Step 4: Turning the phone on

Press the power button for 2-3 seconds. After booting the system will be a notification of the detection of a new one. SIM-map.

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If the phone doesn’t see the second SIM, try swapping the cards – sometimes the SIM 2 slot is less sensitive to contacts.

Activation of the second SIM in the MIUI/HyperOS settings

SIM installation is only half the battle, and now you have to set it up properly in the system, and the interface may vary slightly depending on the firmware version, but the general logic is maintained.

For MIUI 14/15:

1. Open the Settings. → SIM-maps and mobile networks.
2. Tap the second name. SIM-maps, for example, SIM 2: MTS).
3. Switch the switchboard Include SIM-map..
4. Select Network Type (4G/5G is recommended for better speed).

For HyperOS (2026):

1. Go to Settings → Connections → Mobile Network.
2. Select Control. SIM-map.
3. Activate the second SIM and set priorities (calls, SMS, mobile Internet).

Additional settings:

• 📞 Calls: In the Call Settings section, you can choose which SIM will be used by default.
• 🌐 Mobile Internet: Into the Mobile Network → Access point (APN) set the operator parameters (usually set automatically).
• 📩 SMS: In Message Settings, specify the SIM to send SMS default.

⚠️ Note: If after activation of the second SIM, the mobile Internet on the first one stopped working, check the setting Priority SIM Some firmwares need to manually specify which SIM is used for data transmission.

Set up eSIM as a second SIM-maps (for supported models)

Xiaomi 13 Lite models, Xiaomi 12S Ultra and new flagships support eSIM – electronic SIM-It's convenient for traveling or using the second number without buying an extra physical SIM.

How to activate eSIM:

1. Get it. QR-activation code or data from your operator (for example, MTS, Beeline or MegaFon support eSIM).
2. Go to Settings. → SIM-maps and mobile networks → Add a mobile fare.
3. Choose Use eSIM and scan it. QR-code (or enter data manually).
4. Confirm activation and restart the phone.

The advantages of eSIM:

• 🌍 You can quickly change the operator without replacing the physical SIM.
• 🔄 Easy to switch between tariffs (e.g. local fare abroad).
• 📱 Frees up a physical slot for a memory card or a second SIM of another format.

Important: eSIM cannot be transferred to another phone – when changing the device, you will need to re-activate the operator.

The solution to the problem: why the second SIM does not work

If the second SIM is not detected or catches the network after installation, check the following points:

Physical problems:

• 🔌 Bad contact: Take out the tray and check if the SIM's metal contacts are contaminated. wipe them with a wipe or an alcohol napkin.
• 📏 Incorrect size: Make sure you use nano-SIM. Micro-SIM or cropped SIM may not be in contact.
• 🔄 Inverted SIM: On some models (e.g. Redmi) 9A) The simk should be down the chip.

Programmatic errors:

• 📱 Reset Network Settings: Go to Settings → Resetting settings → Reset the network settings, which will return the communication parameters to the factory.
• 🔄 Firmware Update: Go to Settings → The phone. → Update the system and install the latest patches.
• 🛠️ Manual setting APN: If the Internet does not work, add the access point manually (options can be taken on the operator's website).

Hardware restrictions:

• 📵 Operator incompatibility: Some virtual operators (e.g. Yota or Tinkoff Mobile) may not work in the second slot.
• 🔋 Savings in charge: In battery settings (Settings) → Battery) disable the option Background Limitation for SIM 2.

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If the second SIM only works for calls but doesn’t catch the internet, check SIM Priority settings for data – it’s possible that mobile traffic is tied to the first SIM.

Optimizing the two SIM-maps: tips and life hacks

Two. SIM-Cards are convenient, but without the right settings, you might run into a quick battery drain or missed calls:

1. Energy consumption management:

• 🔋 Turn it off. 4G/5G on the second SIM, if it is used only for calls: Settings → SIM-map → choose SIM 2 → Type of network → 3G.
• ⏳ Set up Power Saving Mode for Second SIM: In Battery Settings, Limit Background Activity for Unused Applications.

Call routing and SMS:

• 📞 Use Smart Choices SIM (available on HyperOS: the phone will automatically select the SIM for outgoing calls depending on the tariff.
• 📩 For SMS Set up rules in Message Settings: For example, send SMS from the first SIM, if the second in roaming.

Internet and roaming:

• 🌍 For travel, turn off Automatic Network Selection on the second SIM to avoid accidentally connecting to paid roaming.
• 📶 Use applications like Dual Apps (built into the app). MIUI), to duplicate messengers (such as WhatsApp or Telegram) for each SIM.

Safety:

• 🔒 Set up. PIN-code for the second SIM: Settings → Security → Lockdown SIM-map.
• 🚫 Disable Call Redirection if you do not use it – this will prevent unauthorized redirection of calls to paid numbers.

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If you travel frequently, create a mobile network profile for each country in Settings → Mobile Network → Additional. This will speed up your connection to local networks.

Frequent questions about Dual SIM on Xiaomi