How to change SIM-map on a Xiaomi smartphone

Changing the carrier, switching to a tariff with a large amount of traffic or simply losing an old card are situations that require physical replacement of the media, Xiaomi users often have. Despite the fact that modern smartphones have unified slots, the procedure for extracting and installing the communication module has its own nuances, ignoring which can damage the tray or the device itself. Owners of devices from Redmi and POCO often face the same design of the case, where the tray is combined with a memory card slot, which requires careful installation.

In this guide, we will discuss the replacement process in detail. SIM-maps, ranging from tool preparation and ending with software network configuration in the shell MIUI You'll learn how to correctly identify the tray type, avoid chip installation errors, and what to do if your smartphone stops seeing the network after you've replaced it. Your data security and contact integrity are a priority, so follow the instructions consistently.

Before you start any manipulation of the physical components of a smartphone, it is important to understand what design you are dealing with. In modern Xiaomi models, several types of trays are used, and trying to insert a card in the wrong slot can lead to breakage of contact platforms. In most current Xiaomi models, the tray is combined: one side is designed for nano-SIM, and the second is for a microSD memory card, or for the second. SIM-maps depending on the regional version of the device.

Preparation for replacement and determination of the type of tray

The first step before replacing a sim card with Xiaomi is to prepare the workplace and the necessary tools. You will need a special key-clip that comes with the device, or its analogue, such as a thin needle or an unbended stationery clip. Do not use thick objects such as toothpicks or pins, as they can get stuck in the opening of the mechanism or damage the extract sensor, which will make it impossible to open the tray in the future.

Be sure to turn off your smartphone before starting the procedure. Although Hot-Swap technology theoretically allows you to change cards without turning off, in practice in Xiaomi devices this often leads to software failures where the system does not recognize the new chip before a full reboot, or, in the worst case, can cause a short circuit in the power supply of the communication module.

Look at the side of your smartphone. Depending on the model (Redmi Note, Xiaomi Mi, POCO F), the tray can be on top or bottom. Find a small hole next to the elongated tray. If you are unsure about the design, consult the documentation or find an exact model on the Internet, as in some protected models or older versions, the trays can be hidden under a removable back cover, although this is already rare for modern Xiaomi.

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Use the original key from the kit or a clip with a diameter of no more than 1 mm, so as not to shake the mechanism of extraction of the tray.

The process of extracting the tray and installing the map

Once the smartphone is off and the key is ready, position the device on a flat, well-lit surface.The screen is better placed on a soft cloth or napkin to avoid scratching if the tool slips.Insert the key point into the extraction mechanism hole perpendicular to the body. Press smoothly but confidently until the tray jumps and leaves the case a few millimeters.

Remove the tray completely and carefully examine its shape. On most modern Xiaomi smartphones, it has an asymmetrical shape with cutouts that will not allow you to install the card incorrectly if you act carefully. However, the effort here should not be applied: if the card does not fall into the groove easily, then you have chosen the wrong side or confused the groove for microSD and SIM. Make sure that the gold pins of the chip are downward, and the beveled angle matches the circuit on the tray.

Put the tray back into the case in exactly the same position it was removed. Usually, there's a small bevel or marking on the tray frame that indicates the top or bottom. Don't try to push the tray by force -- if it doesn't come in, flip it over. Once the tray is leveled with the body, turn on the smartphone and wait for the operating system to load.

Network setting and selection SIM-default-card

Once the device is turned on, the system will automatically try to log in to the operator's network. SIM-map, MIUI It will suggest setting their priority. Go to the Settings menu, then select a paragraph. SIM-Maps and mobile networks. Both slots are displayed here, and you can name them, like "Work" and "Personal" so you don't get confused.

This section also sets the default settings for different activities. You can choose which card will be used for mobile Internet and which card will be used for voice calls and SMS. This is especially convenient if you have unlimited Internet on one card and a packet of minutes on another. The system allows you to set the "Always Ask" mode if you want to control expenses manually before each call.

To activate high-speed Internet, make sure that the settings of the access point (APN) Usually Xiaomi automatically downloads them from the operator's server when you first register the network, but sometimes you need to manually check them. SIM-map -> Access points (APN) and select Reset if the internet is not working to restore factory settings for your operator.

Solving definition problems SIM-map

When the smartphone is replaced, it says, No. SIM-"Put in the cards" or "Put in" SIM-The map is rare, but requires a systematic approach to the solution. First, check the purity of the contacts on the map and in the tray. Fat spots or oxidation can prevent contact. Wipe the chip with a soft dry cloth, and blow carefully into the tray to remove dust.

If the physical cleanup didn’t work, the problem may be a software failure of network registration. Try resetting your network settings. Go to Settings -> Connection and Sharing -> Reset Wi-Fi, mobile networks and Bluetooth. Note that this action will remove saved passwords from Wi-Fi, but will not affect your personal data, photos or contacts.

In rare cases, the problem lies in the incompatibility of communication standards. SIM-Mini-SIM cards, trimmed to nanosize with scissors, may have a thickened plastic frame or a damaged chip, often stuck or poorly contacted, and the best solution would be to replace the card from the carrier with a new one that meets the standard. 4G/5G.

⚠️ Note: If after installing a new SIM-The smartphone starts to heat up very much at the bottom of the case or quickly discharges in standby mode, immediately remove the card.This may indicate a short circuit inside the card chip, which is dangerous for the phone's power controller.

Using eSIM on Xiaomi devices

Xiaomi’s current flagship models are increasingly supporting eSIM (built-in) technology. SIM-This is a virtual operator profile that doesn't require a physical tray. You don't have to change your plastic card to activate the eSIM, you just need to scan it. QR-code provided by the operator through the settings menu.

The process of setting up usually looks like this: in the menu SIM-Cards and mobile networks are selected by the option Add a tariff plan or Add eSIM. QR-This allows up to 8 operator profiles, although usually two are active at the same time (one physical and one virtual, or two virtual depending on the model).

At the time of writing in Russia and CIS countries, support for this technology is being introduced gradually, so before buying the flagship Xiaomi for eSIM, check with your operator the possibility of connecting.

Comparison of tray types in different Xiaomi series

Design of slots SIM-maps in the lines of Xiaomi, Redmi and POCO Understanding these differences will help avoid mistakes when buying new cards or adapters. Below is a table that systematizes the types of trays in popular series.

As can be seen from the table, in budget models of the Redmi Note series, a separate slot for a memory card is often found, which allows you to use two different slots. SIM-The cards and the flash drive are at the same time. POCO Mi often sacrifices memory cards for compactness, leaving only a hybrid slot.

⚠️ Note: Never try to insert a microSD card into a slot. SIM-And the contacts are in different places, and this is guaranteed to short-circuit and crash the motherboard.

Frequently Asked Questions (FAQ)

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Correct orientation of the bevelled angle SIM-cards and cleanliness of contacts - the main conditions for successful replacement without contacting the service.

In conclusion, it is worth noting that the replacement SIM-Xiaomi maps are a simple process, but require care, and keeping the right tools, using the right tools, and understanding the design of your device will avoid most problems. If after all the manipulations the network did not appear, it makes sense to check the card on another device or contact the operator for a replacement of the carrier.