Two. SIM-Xiaomi cards: how to properly configure and use

Use of the two SIM-Xiaomi smartphones are not just a convenience, but often a necessity for those who share work and personal contacts, travel between countries or save on tariffs of different operators. 2026 Many users face problems: the slot for the second SIM It's not recognized, then. 4G It only works on one card, so calls are coming to the wrong number. SIM on Redmi devices, POCO and Mi/Xiaomi, including new models with support 5G+4G.

It is important to understand that the activation algorithm of the second SIM It depends on three factors: the phone model (whether there is a physical slot or only an eSIM), the version of the phone. MIUI (In old firmware, the menu is different) and the type SIM-We will discuss universal solutions (nano-SIM, micro-SIM or virtual eSIM). MIUI 14/15, Flexible management of network and call priorities.

If you just bought a Xiaomi smartphone or plan to use two SIM-If you don't know where to start, this guide will help you avoid errors, such as why the mobile Internet disappears after you insert the second card, or how to turn on VoLTE for both numbers at the same time. And at the end of the article you will find answers to frequent questions, including compatibility with operators MTS, Beeline, Tele2 and MegaFon.

1. Check your Xiaomi’s compatibility with Dual SIM

Before trying to set up two SIM-maps, make sure your Xiaomi model supports this feature at all.Most of the brand's modern smartphones feature a hybrid slot that allows you to use the feature:

• 📱 Two nano-SIM cards (without a memory card)
• 📱 One nano-SIM. + microSD (second microSD) SIM shut down)
• 📱 One physical. SIM + eSIM (on new models)

The exceptions are some budget models (e.g. Redmi). A1 or POCO C50), There's only one slot. SIM possible:

1. On the official website of Xiaomi in the characteristics of the model (section "Network").
2. Settings → About Phone → Characteristics (look for the line “Dual SIM”).
3. Visually: if on the tray for SIM-There are two slots under nano-SIM - supported.

Attention to hybrid slots! if your Xiaomi has a combined slot (SIM + microSD, when installing a memory card, the second SIM-The card will automatically turn off. This is a hardware limitation that you can't get around software. → SIM-maps and mobile networks → Slot 2.

Physical installation SIM-maps: step-by-step instruction

If your smartphone supports two SIM-The first thing you need to do is to install them correctly, and this is how to do it without damaging the tray or the contacts:

Turn off your phone (optional, but recommended)

Use the original paperclip from the set

Check that SIM-The cards are trimmed to nano-SIM format

Do not touch the gold contacts of the cards.-->

Follow the algorithm further:

1. Find a tray for SIM-The card is usually located on the top or side of the phone. On some models (for example, Xiaomi 13 Ultra), the tray is hidden under the camera cover.
2. Put the paper clip in a small hole next to the tray to move it out. Do not use force - if the tray does not come out, check if it is jammed due to dust.
3. Place it. SIM-cardboard: 📌 SIM 1 – usually the top slot (main slot). 📌 SIM 2 - Lower slot (can be hybrid with microSD).

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

Turn on the phone after installation. SIM-maps not defined:

• 🔄 Reset the device.
• 🧹 Gently wipe the contacts of the card and tray with a dry cloth (without alcohol!).
• 🔧 Check if the contact in the tray is bent (a common problem after phone falls).

Activation second SIM-card MIUI

Physical installation SIM-There are not enough cards, you need to activate them in the system. MIUI (12, 13, 14 or 15) the path to settings may be slightly different, but the general logic holds:

1. Open the settings (cog icon on the desktop).
2. Go to section. SIM-Maps and mobile networks (some models are called mobile networks).
3. Tap the second name. SIM-maps, for example, SIM 2 or Slot 2).
4. Activate the switch Turn on SIM-If it's not there, check if the card is inserted correctly.

After activation, the system may request:

• 🔐 PIN-code (if it is set to the SIM-map).
• 📶 Network settings (automatically or manually).
• 📞 Name. SIM-Cards (e.g., “Worker” or “Personal»).

If the second SIM-card not activated:

• 🔄 Try swapping the cards (possibly the problem in the slot).
• 📡 Check if your operator supports regional operations (e.g. Tele2 may not catch the network in some countries).
• 🔧 Update the firmware: go to Settings → The phone. → Updating the system.

💡

If after activation of the second SIM-Mobile Internet is lost, check the settings APN. Often operators (especially MTS and Beeline) require manual input of Internet access parameters.

Set Network Priorities: 4G, 5G and Calls

One of the most common problems with using two SIM-Xiaomi maps are a network conflict. 4G, and second only 2G, It's because of hardware constraints, most smartphones (except flagships like Xiaomi) 14 Pro) cannot simultaneously support 4G/5G both SIM-card.

To set priorities:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose. SIM-The card you want to prioritize.
3. Tap the network type and select the optimal mode: 📶 4G (Recommended) – for the Internet and calls. 📞 Only 3G — If you only need calls (saves charge). ⚡ 5G — Available only on flagships (e.g. Xiaomi) 13T Pro).

Calls.

• 📞 Basic SIM For calls, choose which number will receive incoming.
• 🔄 Redirect – set up a redirect to a second number if the first one is not available.

For SMS:

• 📩 In the Messages menu (default application) you can choose from which SIM send out SMS.
• 🔄 Set up a redirect. SMS In Settings → SIM-map → Message forwarding.
• 🚫 To avoid spam, turn off incoming notifications SMS unnecessary SIM In Settings → Notifications → Communications.