Xiaomi Redmi 12: How much? SIM-All about slots and hybrid solutions

Xiaomi Redmi 12 is one of the most popular budget smartphones of 2023, which combines modern design, productive filling and affordable price. SIM-Does this model support cards? Can you use two SIMs at the same time? And what about a memory card -- don't you have to sacrifice a second slot? In this article, we'll look at all the nuances of working with the computer? SIM-Redmi 12 cards, including technical limitations, customization features and possible problems.

Let's just say, the Xiaomi Redmi 12 is one of those smartphones where the manufacturer has tried to be as flexible as possible in the issue of expanding memory and supporting multiple operators. However, as with many modern devices, there are trade-offs. If you plan to use two SIMs and a memory card, prepare yourself for the choice. If you only need SIMs without additional storage, then there will be no problems. Next, we will explain in detail how everything works, and give practical recommendations for setting up.

Technical specifications: how many SIM-maps in Redmi 12?

Official specifications Xiaomi Redmi 12 (model) 23049RA4BI For the global market, there's a point of support for two nano-SIM cards, but there's a big caveat: a slot for the second. SIM-The card is hybrid, which means you can choose between two options:

• 📱 Two nano-SIM cards (Dual) SIM) — Ideal for those who use two operators at the same time.
• 📱💾 One nano-SIM + microSD card (up to 1 TB) – suitable if priority is given to additional storage.

It is important to understand that two people are used simultaneously. SIM-Redmi 12 is not a card or memory card, and this limitation is related to the design of the card tray, where the second slot is combined with a microSD connector, which saves space inside the case, but requires the user to make an informed choice.

The smartphone supports Dual SIM Dual Standby (DSDS) technology, which means:

• ✅ Both SIM-Cards are active at the same time and can receive calls.
• ❌ But while talking on one SIM, the second will not be available (Dual is not supported). SIM Dual Active, as in some flagships).

What does the tray look like for SIM-maps in Redmi 12?

The card tray in Xiaomi Redmi 12 is made in the standard format for modern smartphones - with a retractable mechanism that opens with a special key (included).

• 🔹 Slot 1 – for nano-SIM (main) only).
• 🔹 Slot 2 is a hybrid: either nano-SIM or microSD.
• 🔹 Slot 3 is missing (unlike some models with three slots).

The exterior of the tray is not different from similar solutions in other Xiaomi smartphones, but has a marking that helps to correctly install the cards. For example, on the back of the tray, pictograms are usually printed indicating which side to insert. SIM-map.

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If you don't have a key to extract the tray, you can use a paper clip or a needle carefully, and the main thing is not to put too much effort into it so as not to damage the mechanism.

Note that Redmi 12 does not support eSIMs. SIM-cards that can be activated without a physical chip, a feature that is still the preserve of more expensive Xiaomi models such as the Xiaomi 13 or the Xiaomi X-ray. POCO F5.

How to set up two SIM-maps in Redmi 12?

If you choose to use two physical SIM-It takes literally a few minutes to set up the maps in Redmi 12:

1. Insert both nano-SIMs into the respective tray slots (first and second).
2. Turn on your smartphone and wait for the card recognition.
3. Go to Settings. → SIM-maps and mobile networks.
4. Click on the name of each SIM-cards to give her a unique name (e.g., "Worker" and "Personal").
5. In the SIM-card Selection by default, specify which SIM to use for calls, SMS and mobile Internet.

The smartphone allows you to flexibly manage priorities:

• 📞 Calls: You can choose which SIM to call from by default or set a choice for each call.
• 🌐 Mobile Internet: activate data transfer only on one of the sims.
• 💬 SMS: similar to calls – choosing a SIM to send messages.

Pay attention to the dual function SIM-The card is always active in settings. If it's on, the smartphone will keep in touch with both operators at the same time, but this can slightly increase battery consumption. If you are more important to save charge, you can disable this option - then the second SIM will only be activated if necessary (for example, for an incoming call).

Can I use SIM+ microSD at the same time?

As we mentioned, the Xiaomi Redmi 12 does not support the simultaneous use of two. SIM-But you can choose a combination of one. SIM + microSD. Here's how to do it:

1. Remove the card tray with the key.
2. Insert nano-SIM (required!) in the first slot.
3. In the second slot, insert a microSD (up to 1 TB).
4. Install the tray back and turn on the smartphone.

After that, the Warehouse section will appear in the settings, where you can format the memory card as a portable device or internal memory (in the latter case, the data on the card will be encrypted and tied to the smartphone).

⚠️ Note: If you choose to use microSD as internal memory, it cannot be retrieved without data loss, and some applications (such as WhatsApp or Telegram) may not work properly when ported to the mobile device. SD-map.

The speed of the memory card depends on its class. Redmi 12 recommended to use a microSD class UHS-I (U1 or U3), which will provide fast recording and reading data, especially when shooting high-resolution video.

What problems can arise with SIM-maps in Redmi 12?

Despite the well-designed architecture, Redmi 12 users sometimes face problems when working with the user. SIM-Here are the most common ones and the ways to solve them:

• 🔴 The smartphone can't see. SIM-Map Causes: wrong installation, damaged chip, operator incompatibility. Solution: reboot the device, check the card correctly, try another one. SIM. If the problem remains, contact the operator to check the card.
• 🔴 Mobile Internet does not work on one of the sims Reasons: incorrect settings APN, Operator restrictions, conflict with another SIM. Solution: Go to Settings → SIM-maps and mobile networks → [choose SIM] → Access points (APN) and adjust the parameters manually (the data can be requested from the operator).
• 🔴 The smartphone itself switches between the SIMs of the Reason: the function "Intelligent switch" or weak signal on the main SIM is enabled. Solution: disable automatic switching in the settings SIM-maps or check the coverage area.

Another common problem is the conflict between two SIMs of the same operator, and some mobile networks (such as MTS or Beeline) can block the work of two of their own. SIM-In this case, you'll have to use the SIMs of different operators.

⚠️ Note: If the firmware has stopped working after the update SIM-maps, try resetting network settings: Settings → System system → Reset → Network resets. It won't delete your data, but it will return network settings to factory settings.

Comparison with other Xiaomi models: who supports more SIM-map?

If you are critical to support two SIM-cards and memory cards at the same time, it is worth considering alternative models of Xiaomi. POCO Or older Redmi Note models have three separate slots:

As you can see from the table, Redmi 12 is not unique in terms of support. SIM-card – most modern Xiaomi smartphones have switched to hybrid solutions. If it is crucial to have two SIMs and a memory card at the same time, look at older models such as the Redmi 10 or Redmi Note 9, which still save three separate slots.

It’s also worth noting that in 2026, Xiaomi began to actively implement eSIM support in its flagship models, and perhaps in future generations of Redmi, this feature will appear in the budget segment, which will allow you to use two SIMs (physical + virtual) without victims in the form of a memory card slot.

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If you need two SIM cards and a microSD at the same time, consider three-slot models (like Redmi 10) or eSIM-enabled models (like Xiaomi 13).

Selection advice SIM-maps for Redmi 12

To avoid problems with work SIM-Xiaomi Redmi 12 cards, follow these guidelines:

• 🔹 Use nano-SIMs from reliable carriers. Avoid hand-cut cards, which may not communicate well.
• 🔹 Check compatibility with 4G/5G. Not all operators support modern communication standards on both sims at the same time.
• 🔹 Set your priorities. In the settings, specify which SIM to use for the Internet, calls and calls. SMS default.
• 🔹 Update your firmware. Sometimes you have trouble with SIM-Maps are solved after installing fresh updates MIUI.

If you travel frequently, it makes sense to have a separate SIM-In Redmi 12, you can quickly switch between SIMs right when you call or send a message, and you just click on the SIM icon in your phone or messenger interface.

Also look at regional versions of the smartphone. For example, the global version of Redmi 12 (labeled Global) supports more 4G/5G bands than the Chinese version. This may be critical if you plan to use SIMs from overseas carriers.

FAQ: Frequent questions about SIM-Maps in Xiaomi Redmi 12