Two. SIM-Xiaomi Redmi Note: full instructions for setting up and using

Modern smartphones Xiaomi Redmi Note support work with two SIM-With cards simultaneously, allowing you to separate personal and work numbers, save on roaming or use tariffs from different operators, but not all users know how to properly configure this feature to avoid connection problems, fast battery discharge or network conflicts. In this article, we will break down all the nuances – from the physical installation of maps to fine-tuning network priorities and traffic management.

It is important to understand that the hybrid slot (present in most Redmi Note models) involves a choice between the second. SIM-We'll show you how to allocate your smartphone resources optimally so you don't sacrifice your communication or memory. 4G (simultaneous operation of two cards on the network 4G), where one of the SIM will be limited 2G/3G.

If you are in a situation where one of the SIM-The card suddenly stops catching the network or the smartphone randomly switches between them, here you will find solutions to these and other common problems.+, sensing MIUI (including the Chinese and global versions).

Which Redmi Note models support two models? SIM-map?

The vast majority of smartphones of the line Redmi Note are equipped with a hybrid slot for two nano-SIM or one nano-SIM + However, there are nuances that depend on the specific model and region of sale:

• 📱 Redmi Note 10/11/12/13 series - hybrid slot (2 nano-SIM or 1 SIM + MicroSD support for Dual 4G depends on the firmware version.
• 🌍 Global versions (marked Global) usually support Dual. 4G "box".
• 🇨🇳 Chinese versions (without Google services) may require manual Dual mode activation 4G through the engineering menu.
• ⚠️ Redmi Note 8/9 Pro - in some versions the second SIM only works 3G, even if the main 4G.

To know exactly the capabilities of your model, check the specifications on the official Xiaomi website or use the table below:

⚠️ Note: In models with support 5G (For example, the Redmi Note 12 5G) one SIM-The card can automatically switch to mode. 4G, If the other one is active, that's normal behavior. 5G requires a separate module that cannot work simultaneously with two cards.

Installation SIM-maps: step-by-step instruction

Before installing the cards, make sure you have a tray extraction tool (goes bundled with a smartphone) and that SIM-If you plan to use a memory card, remember: in a hybrid slot you can install either a second one. SIM, MicroSD: Both options are not possible at the same time.

Follow this algorithm:

1. Turn off your smartphone (recommended, but not necessarily for most models).
2. Find a slot for SIM-cards on the side of the device (usually on the left).
3. Insert the tool into the hole next to the slot and gently press to let the tray out.
4. Place it. SIM-cards in the tray according to the scheme (drawn on the tray itself or in the instructions).
5. Put the tray back in before the click.

SIM-maps are trimmed to nano-format|

Tool for extracting the tray at hand|

Smartphone is off (recommended)|

Checked card contacts for cleanliness-->

After switching on, the smartphone will automatically identify operators if one of the SIM unrecognizable:

• 🔄 Reset the device.
• 🧹 Gently wipe the contacts of the card with a dry cloth.
• 📶 Check if your operator supports the work in the region (especially for tourists). SIM).

Two. SIM-map|

One. SIM + memory-card|

Only one. SIM-map-->

Set Network and Operator Priorities

Xiaomi Redmi Note chooses the network for each SIM-It's not always optimal, for example, if one card is only used for calls and the other card is used for the Internet, it makes sense to manually prioritize. → SIM-maps and mobile networks.

The main parameters that should be set up:

• 📶 Network mode: for the main SIM choose 4G (preferably 5G (If it is supported, the second can be limited to 3G, If it is used only for calls.
• 🔄 Automatic network selection: disable this option if you want to manually specify the operator (useful in roaming).
• 📞 Voice calls: If your carrier supports VoLTE, enable this option for clearer communication.
• 🌐 Mobile data: indicate which SIM will be used for data transmission by default.

For models with Dual support 4G (For example, the Redmi Note 12 Pro+) The option to use is available 4G both SIM. But remember, this can increase battery consumption by 10 to 15 percent. If the battery runs out too fast, go back to mode where there's only one. SIM work 4G.

Mobile Traffic Management and Balancing

One of the most common problems with using two SIM — uncontrolled traffic flow. By default MIUI It can switch between cards to save battery or improve communication, leading to unexpected write-offs. To avoid this, adjust the following settings:

Go to Settings. → SIM-maps and mobile networks → Mobile traffic and:

• 📊 Set a traffic limit for each SIM It is useful if you have different rates).
• 🔄 Turn off the option Automatic data switching, if you do not want the smartphone to choose SIM internet-based.
• 🚫 In the Application section, prohibit background data transfer for unnecessary programs (for example, social networks on the second one). SIM).

For advanced users, the function of separate traffic use is available:

- Assign specific apps (such as WhatsApp or Telegram) to use only one app. SIM-map.

- This is done in the Settings menu. → Annexes → Application data management.

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If you travel frequently, create a mobile data profile for roaming: in the settings SIM-Cards specify a maximum traffic limit (for example, 50 MB / day) and disable automatic updates of applications.

⚠️ Note: In models of Redmi Note with firmware MIUI There is a bug 13 and older: with active Wi-Fi, the smartphone can continue to use mobile traffic in the background. To fix this, turn off the option Smart Switch in the mobile network settings.

Solving common problems

Even with the right setup, users face typical problems, and here are the most common ways to solve them:

1.Second. SIM netless

• 🔧 Check if the card is correctly installed in the tray (contacts should be facing downwards).
• 📶 Switch the network mode for this one SIM on 2G — sometimes 3G/4G not supported by the operator.
• 🔄 Turn on and off flight mode for 30 seconds.
• 📱 Update the firmware: in older versions MIUI There are bugs with hybrid slots.

2.The smartphone itself switches between SIM

This is due to the function of Smart switching to MIUI. To turn it off:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose. SIM-map for which you want to disable autoswitching.
3. Turn off the option Automatic Network Selection and Smart Switching.

3. Battery discharges quickly

Two active SIM-And these cards increase the charge by 15 to 25 percent to save money:

• ⚡ Turn it off. 4G second SIM, If it is used only for calls.
• 📵 Turn on Traffic Saving Mode in Battery Settings.
• 🕒 Set up a sleep schedule for mobile data (such as turning off the internet at night).

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If the network problem persists after all the manipulations, try resetting the network settings: → System system → Resetting settings → Resetting your mobile network. It won't delete your data, but it will return all communication parameters to the factory.

4.VolTE does not work on the second SIM

In most models of Redmi Note (except flagship) VoLTE is supported only on the main SIM-To check the map:

• Call each one. SIM To ##4636## and select Phone Information.
• Look at the VoLTE provisioned bar – if 1, then VoLTE is active.

Features of use in roaming

When traveling abroad, two SIM-These cards can both save money and lead to unexpected expenses:

• 🌍 Turn off data in roaming for the main SIM, Even the background activity of apps can write off hundreds of rubles.
• 📱 Buy a local. SIM-map (for example, at the airport) and set it in the second slot. Configure it as the main data slot.
• 🔄 Use data roaming only for selected applications (such as maps or instant messengers).
• 💰 Check your operator's rates for incoming roaming calls - sometimes they're paid even if you get a call.

For models with MIUI 14+ The "Tourist mode" function is available":

1. Go to Settings. → Special facilities → Tourist regime.
2. Choose. SIM-The card you will use abroad.
3. Activate the option to limit background data for another SIM.

⚠️ Note: In some countries (e.g. the United States or the UAE) local operators block foreign operations SIM-map 4G/5G, leaving only 2G. Please clarify this information in advance.

Compatibility with a memory card: what to choose?

If you decide to donate the second SIM In favor of the memory card, consider the following nuances:

• 📱 The maximum volume supported depends on the model: from 256 GB (Redmi Note 10) to 1 TB (Redmi Note 13 Pro).+).
• ⚡ MicroSD class memory cards A1 or A2 Provide faster application operation.
• 🔄 V MIUI You can configure the memory card as an internal storage, but this will lead to its encryption and inability to use in other devices.
• 📁 Some apps (such as WhatsApp or Telegram) do not allow data to be transferred to the Internet. SD-map.

If both are critically important SIM-Cards and additional memory, consider the following options:

• 📱 Buy a Redmi Note model with 256 GB of internal memory (for example, Redmi Note) 12 Pro+ 8/256).
• ☁ Use Google Drive (Mi Cloud) for photos and documents.
• 🔄 Regularly transfer files to your computer or external drive.

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If you still choose a memory card, format it in exFAT format via your smartphone – this will allow you to record files larger than 4 GB (for example, video in the video format). 4K).

FAQ: Answers to Frequent Questions