Two. SIM-Xiaomi Redmi cards: how to set up, use and avoid errors

Introduction: Why do we need two? SIM-cards in a modern smartphone

Xiaomi Redmi smartphones have long supported the work with two SIM-And they're using maps at the same time, but not all users know how to configure this functionality correctly. SIM-support (Dual support) SIM) It allows you to separate personal and work calls, use advantageous rates of different operators or stay in touch while traveling abroad, but the wrong setup can lead to network problems, fast battery discharge or missed calls.

In this article, we will discuss all the nuances of working with two SIM-Xiaomi Redmi cards, from basic activation to fine-tuning network priorities to solving common errors. 10/11/12, Redmi 9/10/11, POCO X3/X4/X5 and other devices based on MIUI 12-14. If you just bought a smartphone or want to optimize the work of two SIM, This guide will help you avoid common mistakes.

What Xiaomi Redmi models support two SIM-map

The vast majority of Xiaomi Redmi smartphones released after 2018 are equipped with a dual nano-SIM slot or a combined slot (nano-SIM + microSD).

• 📱 Redmi Note 10/11/12, Redmi 9/10/11, POCO X3/X4/X5 — Full support for Dual SIM + microSD (hybrid slot).
• 📱 Redmi K40/K50, POCO F3/F4 — two nano-SIM slots without memory expansion (no microSD).
• 📱 Redmi A1/A2, Redmi 8A — hybrid slot, but with restrictions on certain ranges 4G/5G.
• ⚠️ Redmi 12 5G (2023 – In some regions, a single physical slot version (eSIM) is sold + nano-SIM).

To know exactly the configuration of your device, check the specifications on the official Xiaomi website or look at the tray for the device. SIM-If there are two separate slots under nano-SIM, your smartphone supports Dual. SIM without restrictions, if one nest is combined (SIM + MicroSD, you have to choose between the second. SIM-memory-card.

How do you put two in? SIM-Maps in Xiaomi Redmi: step-by-step instructions

Before installation SIM-You should turn off your smartphone, and this will prevent damage to the slot contacts:

1. Find a tray for SIM-cards on the side of the smartphone (usually on the right).
2. Insert a paperclip (or a special key from the kit) into a small hole next to the tray to extract it.
3. Put it down. SIM-card-in-the-tray: 📇 SIM 1 — The main slot (usually supports) 4G/5G). 📇 SIM 2 — Additional slot (may have speed limits).

Carefully insert the tray back before the click.

Turn on your smartphone and wait for the activation of networks (usually takes 1-2 minutes).

Make sure your smartphone is off |

Use only nano-SIM (uncut micro-SIM) |

Check the integrity of the contacts on SIM-card|

Don’t make an effort when inserting the tray-->

It's important! If you're using a hybrid slot (SIM + microSD, remember: you can use either the second one at the same time. SIM-It's a card, it's a memory card, but not both.

Setting up two SIM-card MIUI: Priorities, names and networks

After installation SIM-You need to set up your cards correctly to avoid confusion with calls and the Internet. → SIM-Maps and mobile networks and follow the following steps:

1. Assignment of names SIM-map

By default, the cards are designated SIM 1 and SIM 2, which is inconvenient.

1. Tap by name. SIM-maps, for example, SIM 1: MTS).
2. Choose a Name. SIM-cards and enter a convenient designation (for example, "Worker" or "Personal").
3. Press Ready.

3. Selection of a network for mobile Internet

Mobile Internet can only work on one of them. SIM-To change the settings:

1. Go to Settings → SIM-cards and mobile networks → Mobile Internet.
2. Choose. SIM-map that will be used for data transmission.
3. Activate the option to Enable mobile data.

💡

If you have unlimited internet on one SIM and cheap minutes on another, set up the basic SIM for calling and the second for mobile internet, which will help save money.

How to switch between SIM-card-to-bell

If you make frequent calls from multiple numbers, MIUI has a convenient quick switching feature.

1. Dial the number and press the call button.
2. At the top of the screen will appear a pop-up window with a choice SIM-map.
3. Slip on the SIM you want (for example, “Worker” or “Personal”).
4. The call will be made from the selected number.

If the selection window does not appear, check the settings:

1. Open Settings → Applications → Phone → SIM-card priority.
2. Make sure you choose to always ask.
3. If you don’t have an option, update the Phone app via Google Play.

Important! On some Redmi models (like the Redmi Note 10 Pro), when you call actively on one SIM, the second one becomes unavailable for outbound calls, which is a hardware limitation, not a software one.

Solving the problems with two SIM-maps in Xiaomi Redmi

Even when you set it up properly, users sometimes have typical problems, and let's look at the most common ones and how to solve them.

1. One of them SIM-maps not defined

If the smartphone does not see one of the SIM-map:

• 🔄 Reset the device.
• 🔄 Remove and insert. SIM-Re-card (make sure contacts are clean).
• 🔄 Check if your model supports two. SIM This service provider (e.g. some Redmis do not support the service) CDMA-network).
• 🔄 Update the firmware to the latest version.

2.The battery goes down quickly at two. SIM-card

Two active SIM-The cards increase energy consumption by 15-20%. To save charge:

• 🔋 Turn off background data transfer for the second SIM In Settings → SIM-map → Mobile Internet → Background mode.
• 🔋 Set the regimen. 2G second SIM, If it is used only for calls.
• 🔋 Enable Energy Saving Mode in Settings → Battery.

3. Problems with the mobile Internet

If the internet is unstable or shut down:

• 🌐 Make sure that mobile data is included for the correct SIM-map.
• 🌐 Check it out. APN-Operator settings (you can request them from support or download them automatically to Settings) → Mobile network → Access points (APN)).
• 🌐 Turn off VoLTE for a problem SIM In Settings → SIM-map → Challenge LTE (Sometimes it helps to stabilize the connection).

💡

If the network problems occur only in the second SIM-The card, check if it's virtual (like Tinkoff Mobile or Yota). SIM 2 due to frequency restrictions.

⚠️ Attention, Redmi models with support 5G (Redmi Note 11 Pro+ 5G, Redmi K50) second-second SIM-The card can only work in mode. 4G, Even if the operator supports 5G. This is a hardware limitation and cannot be circumvented by software.

Additional Dual SIM features in Xiaomi Redmi

Besides the basic settings, MIUI It offers several useful functions to work with two SIM-cards that many people don’t know about.

Division of notifications on SIM-map

Not to confuse call notifications and SMS:

• 🔔 Go to Settings. → Notifications → Call notifications.
• 🔔 Enable the option to show the name SIM-maps – now the notifications will show which SIM It's a call.
• 🔔 For SMS Enable a similar option in Settings → Notifications → Communications.

2. Automatic Internet switching

If you have a tariff with limited traffic on one SIM and unlimited on another, you can configure automatic switching:

1. Install the Dual App (built into MIUI).
2. Create a duplicate of an app that uses the mobile internet (like YouTube or Telegram).
3. In the duplicate settings, specify the second SIM-map.

3. Lockdown SIM-map PIN-code

To protect SIM-Cards against unauthorized use:

1. Go to Settings → Lock and Protection → Lock SIM-card.
2. Turn on the option and install it. PIN-code SIM.
3. After the reboot, the smartphone will request a PIN when the network is activated.

💡

If you travel frequently, keep your notes. PUK-codes SIM-You'll need them to unlock if you make a mistake three times when you type. PIN.

FAQ: Answers to Frequent Questions about Two SIM-Maps in Xiaomi Redmi

Now you know all about setting up and using the two. SIM-If you have any questions about a specific model or operator, please specify the details in the official documentation or with Xiaomi support. SIM will help save money on communication and make the use of the smartphone as convenient as possible!