Second SIM in Xiaomi Redmi Note 10 Pro: how to turn on and configure correctly

Two-sim smartphone Xiaomi Redmi Note 10 Pro allows you to use two SIM-Cards at the same time are a convenient feature for separating work and personal numbers or saving on roaming, but many users have difficulty activating the second line: the phone does not see. SIM-A card that doesn't catch the network or offers to choose a priority slot. In this article, we'll discuss all the ways to include the second one. SIM, nuances of settings and typical errors that interfere with stable operation.

It’s important to understand that the Redmi Note 10 Pro supports two physical nano-SIM slots (or 1 SIM + microSD), but their performance depends on the firmware version, the operator and even the region of the device purchase. For example, some Asian versions have Dual SIM Dual Standby (DSDSDS) activated by default, and global versions may require manual configuration. We’ll look at universal solutions that work on all versions of MIUI 12-14.

Compatibility check and preparation

Before you turn on the second SIM, make sure your Redmi Note 10 Pro supports this feature.

• 🔹 Hardware restrictions: rare device modifications (e.g. for specific operators) may block the second slot.
• 🔹 Software locks: outdated firmware or custom software (for example, MIUI EU) sometimes resets the settings SIM.
• 🔹 Incorrect installation of cards: if SIM inserted not to the end or inverted, the smartphone does not recognize it.

To check the hardware support, remove the tray for SIM-On the Redmi Note 10 Pro, it's a combination: on one side, it's a slot for nano-SIM 1, on the other, for nano-SIM 2 or microSD. SIM2 It's either a Hybrid, which means it supports two lines, and you can also look at the specifications on Xiaomi's official website, and the "Network" section should indicate Dual. SIM.

The important thing is, if you're using a microSD, the second SIM slot will be locked, you'll have to choose between extra memory or a second line, which is a limitation of the Redmi Note 10 Pro architecture, and you can't get around it without modifying the hardware.

⚠️ Attention: Do not try to insert two SIM-cards at the same time as microSD, which can damage the slot's contacts. Always check that the tray is fixed before clicking.

How to Incorporate a Second SIM

Activation of the second line depends on the current state of the device. Consider three main scenarios: standard activation through settings, forced activation after reset, and solving problems with a gray SIM (when the card is determined, but the network does not catch).

Method 1: Standard activation via menu

If the second SIM is inserted correctly but not active:

1. Open the Settings. → SIM-maps and mobile networks.
2. Slip on an inactive SIM (usually marked as SIM 2 or Line Two).
3. Switch the switchboard Include SIM-map.".
4. Choose a priority slot for calls (if required) or leave Asking always.

After activation, wait for the network to register (the second SIM will appear in the status bar). If the network does not catch, try manually selecting the operator from the Settings menu → Mobile Network → Network Selection.

Method 2: Forced Entry through Engineering Menu

If the standard method didn't work, you can try activating the SIM through hidden settings.

Instructions:

1. Open the phone app and enter the combination: ##4636##
2. In the menu that opens, select Phone Information.
3. Scroll down to the Set preferred network type block and select LTE/3G/2G (auto) mode for SIM 2.
4. Go back to the main menu and select SIM Management, then activate the second line.

⚠️ Warning: Do not change other options in the engineering menu unless you are sure of their purpose. SIM.

Method 3: Resetting network settings

If the second SIM is detected but not registered on the network, reset the network settings:

1. Go to Settings → About the phone → Reset settings.
2. Select Reset Wi-Fi, Mobile Network and Bluetooth settings.
3. Confirm the action and restart the device.

After rebooting, re-activate the second SIM through the standard menu, which often helps with setting conflicts after the MIUI update.

Setting priorities and working regimes

Once the second line is activated, it is important to adjust its behavior correctly. The Redmi Note 10 Pro supports several modes of operation of two SIMs:

• 📞 Dual SIM Dual Standby (DSDS): Both cards are active, but during the call, the second one is temporarily disabled.
• 📶 4G/4G Dual VoLTE: Both SIM network 4G At the same time (not available in all regions).
• 🔄 Manual switching: the user chooses which one SIM use for calls/internet.

To set priorities:

1. Go to Settings. → SIM-maps and mobile networks → Priority SIM-map.
2. Choose which one. SIM default: 📞 Calls. 💬 SMS 🌐 Mobile Internet

Always ask

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If you travel frequently, set up the second SIM as a roaming one with a fare for overseas and leave the first for local calls to avoid unexpected costs.

To optimize battery consumption, turn off background network search for the second SIM, If it's rarely used, it's done in the Settings menu. → SIM-map → Additionally. → Network search in the background.

Typical problem solving

Even after setting up the second SIM correctly, it can be unstable, and let’s look at the most common errors and their solutions:

If none of the solutions worked, check. IMEI second SIM — Sometimes it's dropped after it's been firmware. IMEI command

*#06#

Optimizing the operation of two SIMs

Two active SIM-The cards increase the battery and processor load to minimize charge consumption:

• 🔋 Turn off background data transfer for the second SIM, If you only need it for calls.
• 📶 Set up automatic network switching for the main one only. SIM.
• 🛑 Turn off roaming notifications for second line if not used abroad.

For convenience, you can assign each SIM a unique name (e.g., "Worker" and "Personal"). This is done in the Settings menu → SIM-map → Name. SIM. It’s also helpful to customize different call melodies for each line to quickly identify the incoming call.

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Check the balance on both of them regularly. SIM through USSD-query (e.g. *100#) Some operators block the card at zero balance, which can result in network loss.

Frequent questions about the second SIM in the Redmi Note 10 Pro

We will discuss the questions that most often arise when working with two users. SIM-map:

Alternative solutions

If the second SIM on the Redmi Note 10 Pro never worked, consider alternative options:

• 📱 Use of eSIM: Some operators (e.g. MTS or Tele2) support virtualization SIM. This will allow you to have two lines without a physical second card.
• 🔄 Call forwarding: set up forwarding from the second SIM first USSD-commands (e.g. 21[number]#).
• 📞 Annexes for IP-WhatsApp, Telegram or Skype can replace the second line for calls.

If the problem is hardware (for example, a damaged slot), contact the service center. The cost of repairing the SIM slot for the Redmi Note 10 Pro usually does not exceed 1-1.5 thousand rubles, but before visiting, check whether the warranty is maintained after the intervention.

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Before visiting the service, back up your data via Settings → Additional → Backup. This will protect your contacts and messages when resetting.