Xiaomi Mi 10: How many SIM cards support and how to install them

The flagship smartphone Xiaomi Mi 10, released in early 2020, still attracts users with a powerful Snapdragon 865 processor and high-quality AMOLED-However, when buying a used device or switching from another brand, owners often ask about the configuration of the slot for communication cards. SIM-Cards are a critical parameter for those who are used to separating personal and working communication or use tariffs of different operators to save money.

Unlike some budget models, where the slot is combined, it provides full support for two active numbers at the same time. You do not have to choose between a second SIM card and a memory card, since the device does not have a microSD slot. The model supports the simultaneous operation of two SIM-Nano-SIM maps with access to networks 4G LTE and VoLTE on both numbers.

Understanding the tray and the software MIUI (or HyperOS) will avoid installation errors and adjust Internet priorities and calls as conveniently as possible. Next, we will discuss in detail the physical characteristics of the slot, software settings and answer frequent questions.

Physical tray configuration and card types

To begin with, you should refer to the technical specifications of the case. the SIM-card tray in Xiaomi Mi 10 is located on the lower end of the device, to the right of the USB Type-C connector. It is designed in the form of a retractable module, which requires a special metal clip (company) or a thin needle to extract.

The tray is designed according to the Dual Nano-SIM scheme. This means that it can be installed in two cards of the smallest modern format - Nano. The use of adapters or old-format cards (Mini, Micro) is unacceptable, as this can lead to a stuck mechanism or damage to the contact areas inside the smartphone.

It is important to note the lack of support for memory cards. the company's engineers decided to abandon the MicroSD slot in favor of a faster built-in memory UFS 3.0, which in the basic version is 128 GB, and in the top version - 256 GB. Therefore, all two seats in the tray are reserved exclusively for communication modules.

When you take out the tray, look at the shape of the tray, it has a specific bevel on one side, which prevents you from installing it incorrectly, and if you feel resistance when you insert it, don't push it, check the orientation of the map.

Dual 4G and VoLTE technology support

The physical presence of two slots alone is not enough for a comfortable work. A key aspect for Xiaomi Mi 10 users is the support of Dual 4G technology. In older models, the second SIM card often only worked in 2G/3G mode, making it impossible to fast mobile Internet on the second number.

With the Snapdragon X55 5G modem installed in this smartphone, both SIM cards can be on fourth-generation networks at the same time, which means that if one is talking to voice, the second does not switch to 2G, but continues to support high-speed connection if VoLTE (Voice over LTE) is activated.

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To check your operator’s support for VoLTE, enter the code ##86583## in the dial menu. If the message “VoLTE carrier check was disabled” appears, then the artificial restriction is removed and the function will work if it is supported by the tariff.

The Dual SIM Dual Standby (DSDSDS) implementation allows both numbers to be active and accessible for incoming calls. When one number is busy talking, the second number will be unavailable (the subscriber will hear the “busy” signal) if the operator’s call-waiting service is not connected, but switching between them is instantaneous.

It is important to note that when using two active SIM-map-mode 4G The power consumption may increase slightly, as the modem has to communicate with two base stations at the same time. MIUI manages the process effectively.

Installation instructions SIM-map

The process of installing communication cards is simple, but requires care. Before starting the procedure, make sure that the smartphone is turned off. Although modern devices support hot replacement, it is safer to manipulate contacts with a power-off system to avoid software failures of network determination.

To extract the tray, find a small hole next to the slot on the bottom edge. Push the paper clip perpendicular to the body and press before you click. The tray will extend. Put it on a flat surface with the contacts up.

Nano-SIM cards fit into the appropriate recesses. Notice the bevelled corner of the card, which should match the bevelled angle in the tray. Usually the contacts are upwards, but always check the icon that is squeezed out on the tray itself.

⚠️ Warning: Do not insert the tray unless the cards are tightly in their nests. A protruding card can damage the mechanism when closed or lead to poor contact, causing the phone to write No network".

Once installed, gently push the tray back into the case until the characteristic snap of the lock, and now you can turn on the smartphone, and the system automatically detects new cards and suggests adjusting their parameters.

Setup of two SIMs in MIUI

Once the device is turned on, you need to configure the software part correctly. MIUI This is the responsibility of the Settings menu → SIM-Maps and mobile networks, where the user has full control over how the smartphone handles two numbers.

First of all, you need to prioritize, you can choose which SIM card will be used by default for voice calls and which will be used for mobile Internet, and you can also customize each contact separately to call specific people from the right number.

For the internet, you can set a traffic limit or select the “Game Acceleration” mode, which will use both SIM card channels to reduce ping in online games, although this increases traffic consumption.

Remember to activate the VoLTE switch for each card, if it is not automatically enabled, which will ensure high audio quality and the ability to use the Internet during a conversation without switching to 3G.

Comparison of Slot Characteristics

For clarity, here is a comparison table of slots in Xiaomi Mi 10, which will help to understand whether there is a difference between the first and second slots.

As you can see from the table, the only significant difference is the support for fifth-generation networks. At the time of the release of the Xiaomi Mi 10 5G was a priority for one channel, so the second SIM card runs in 4G mode.

This restriction does not affect most users, as 4G networks provide high speeds, and 5G coverage in the regions is still fragmented, both slots are equal in matters of voice and data transmission in the LTE standard.

Solution: if the second SIM is not visible

Sometimes users are faced with a situation where after installing the second card, it is not identified or constantly disappears. Often the problem is contamination of contacts.

Another common reason is an outdated firmware version. Early MIUI versions may have had modem bugs. Check for updates in the Settings → About Phone menu.

⚠️ Note: If you have cut the card SIM It's a very large risk of chip damage or geometry disruption, and it's often stuck or not connected.

It's also worth checking if the slot is activated in the settings. SIM-The card should have a switch on the switchboard opposite the corresponding number. If the problem persists, try resetting the network settings.

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In 90% of cases, problems with the second SIM are solved by a clean card installation or software update to the latest stable version of MIUI.

Frequently Asked Questions (FAQ)