Xiaomi Redmi 12: How much? SIM-Does the card support the smartphone? (2026)

Xiaomi Redmi 12 became one of the most popular budget devices of 2023-2026 due to its balanced characteristics and affordable price. SIM-Does this model support cards? The answer is not as obvious as it seems — it all depends on the modification of the device, the region of sale and even the version of the firmware.

In this article, we will take a closer look at all of the Redmi 12 configurations, including Dual support. SIM, eSIM compatibility, the ability to install MicroSD with two physical cards, and the nuances of working with different mobile operators. SIM-maps, which trays are used in different versions of the smartphone and what to do if one of the cards is not determined.

We will pay special attention to the unique features of the Redmi 12. 5G — A hybrid slot that limits the simultaneous use of two SIM-This is a critical moment for those who are planning to expand the memory of the device.

Official specifications: how many SIM-maps in Redmi 12 4G and 5G?

Xiaomi Redmi 12 is available in two main modifications: 4G (model 23049RA4BI) and 5G (23049RA4CI). Despite the similarities, these versions have fundamental differences in support. SIM-map:

• 📱 Redmi 12 4G: 2 nano-SIM + 1 MicroSD (Separate Slots, No Limits) Supports Dual SIM Dual Standby (DSDS) — Both cards are active at the same time.
• 📶 Redmi 12 5G: 2 nano-SIM or 1 nano-SIM + 1 MicroSD. You have to choose between the second one. SIM-memory-card.

Important: the eSIM in Redmi 12 is not supported in any version. SIM-In the map, consider the Xiaomi models. 13T or POCO F5.

To determine your modification, check:

1. On the device box (model number is indicated on the sticker).
2. In settings: Settings → About the phone → Model.
3. On the back of the tray for SIM-maps (in small print).

Redmi 12 5G Hybrid Slot: How Does It Work and What to Choose?

The main headache of Redmi 12 5G owners is a hybrid slot that combines space for a second nano-SIM and a MicroSD.

• ❌ Two physical SIM-map + memory-card.
• ✅ Or two. SIM-Cards (without MicroSD).
• ✅ Or one. SIM-map + MicroSD (up to 1 TB).

Which option to choose? It all depends on your priorities.

🔹 Expert advice: If you are critically important to both SIM-For personal and work needs, consider Redmi 12. 4G — There are no restrictions on hybrid slots. Or select Redmi Note 12, where you can choose the slot. 5G-The version also has separate slots.

How to insert it correctly SIM-Redmi 12 cards: step-by-step instructions

Incorrect installation SIM-The cards may cause damage or malfunction of the network. Follow this instruction to avoid problems:

1. Turn off your phone and prevent damage to your contacts.
2. Find a tray for SIM-cards on the left side (for Redmi 12) 4G) or on the upper edge (for Redmi 12) 5G).
3. Insert the paperclip into the tray hole and carefully remove it.
4. Place it. SIM-maps according to marking: 📇 Slot 1 (usually closer to the edge of the tray - the main SIM (supportive 4G/5G). 📇 Slot 2 — second-second SIM or MicroSD (in) 5G-version).

downward contact

Carefully insert the tray back before the click.

⚠️ Attention: If after installation SIM-The card is not determined, check it out:

• 🔄 Correct orientation of the card (contacts should be directed to the back of the phone).
• 📶 Operator Compatibility (some virtual operators may not be supported).
• 🔧 Network settings: Settings → SIM-maps and mobile networks → Select the network (select the Automatic mode).

Dual SIM in Redmi 12: How to Configure and Use Two Cards

If you are using two physical SIM-Redmi 12 cards, smartphone supports Dual function SIM Dual Standby (DSDS). This means that both cards can be active at the same time, but with some limitations:

• 📞 Calls: If you are talking one at a time SIM, The second will be unavailable for incoming calls (they will be forwarded to voice mail).
• 🌐 You can use the mobile Internet with only one SIM-cards at a time (manually configured).
• 📶 4G/5G: At Redmi. 12 5G Only the first slot supports the 5G, second only 4G.

🔧 How to set up Dual SIM:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose a Name. SIM-Cards to assign labels (e.g., "Worker" and "Personal»).
3. In the Mobile Data section, specify which SIM will be used for the Internet.
4. In Call Settings, select SIM for outbound calls by default.

💡 Useful Life Hack: To quickly switch between SIM-cards during the call, hold the call button in the phone application - the menu of the card selection will appear.

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If one of them SIM-The cards often lose the network, try to swap them in slots. Sometimes the problem is with the unstable operation of the second module.

Compatibility with operators: which SIM-The cards are working in Redmi 12?

Xiaomi Redmi 12 supports most Russian and international operators, but there are nuances:

• 🏆 No problems working: MTS, Beeline, MegaFon, Tele2, Yota, Tinkoff Mobile.
• ⚠️ Limitations: Virtual operators (e.g. SberMobile, Lenta Mobile) – may require manual configuration APN. Local Regional Operators (e.g. Motive, Sky Link) – check for support 4G/5G.
• 🌍 For roaming: It is recommended to use SIM-VoLTE-enabled card (such as MTS or MegaFon) to avoid voice problems.

📌 How to Check Compatibility:

1. Check with the operator whether it supports VoLTE and ViLTE (important for the user). 5G-version).
2. Check your carrier’s 4G/5G frequencies and compare with the supported Redmi 12 (see table below).

⚠️ Attention: If after installation SIM-Tinkoff Mobile or SberMobile operator cards are not defined by the network, manually add settings APN:

1. Go to Settings. → SIM-maps and mobile networks → Access points (APN).
2. Click Add and enter your operator’s data (can be found on its official website).
3. Save and restart the phone.

Frequent problems with SIM-Redmi 12 cards and their solutions

Even with the right installation SIM-Redmi 12 users sometimes face problems. Let's look at the most common cases and how to fix them:

• 🔴 The smartphone can't see. SIM-map: Check if the contacts are dirty (wipe with soft cloth). Try inserting the card into another smartphone - if it does not work, the problem is: SIM. Update the firmware: Settings → The phone. → Updating the system.
• 📵 No network or often a signal disappears: Switch network mode manually: Settings → SIM-map → Preferred type of network (select the network) 4G Turn off VoLTE in the settings if the operator does not support it.
• 🔄 No mobile internet switching between SIM-Maps: In mobile data settings, select Always Ask to Choose SIM every time you connect.

🛠️ Hardware problems: If none of the methods helped, the following malfunctions are possible:

• Damaged tray for SIM-The card (see if it is not bent).
• Faulty. SIM-Controller on the motherboard (requires repairs).
• Moisture got into the connector (diagnosis is needed in the service center).

⚠️ If you are using Redmi 12, please note: 5G two-way SIM-I noticed that one of them periodically turns off - this is normal behavior. DSDS. To avoid missed calls, set up a redirect to another SIM:

1. Open the Phone app.
2. Press. ⋮ → Settings → Call forwarding.
3. Choose. SIM-Map and activate redirect to number two SIM.

FAQ: Answers to popular questions about SIM-maps 12

Now you know all about support. SIM-If you have any questions, check the official documentation on the Xiaomi website or contact your mobile operator for support.

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Redmi 12 4G — The best option if you need two. SIM-And the cards and the microSD at the same time. 5G-The second version will have to be sacrificed. SIM, memory-extension.