How to insert it correctly SIM-card

Installing a communication module is the first action a new smartphone owner takes, but in Xiaomi devices, this process is often questionable due to the variety of tray designs. Modern models of the brand use different form factors of drives, and trying to insert a card with the wrong side or force can lead to damage to contacts. Understanding the physics of the process and following the algorithm of actions will help avoid common errors in the initial configuration of the gadget.

In this article, we will discuss in detail all the nuances of the installation SIM-cards in different models of Redmi, POCO And Mi, explain how to determine the type of tray and what to do if the phone does not see the network after installation. You will learn about the technical features of combined slots and methods of safely extracting fragile mechanisms without the use of special tools.

Preparation for installation and search for tray

Before you begin to physically affect the device body, you need to make sure that you have all the necessary components to successfully activate the communication. SIM-The card should be trimmed strictly according to the Nano-SIM standard, since most modern Xiaomi smartphones do not have adapters inside the tray. If your card is old-style, contact the operator's salon for a free replacement or cropping, as self-sizing can damage the chip.

The second important step is to find a tray extraction hole, which can be located in unexpected places in different models. Usually, manufacturers place a slot on the lower end of the case, next to the USB Type-C or Micro-USB charging port. However, in some protected models or devices with a non-standard layout of the motherboard, the hole may be on the upper edge or even on the side, so carefully inspect the perimeter of the case in good light.

Removing the tray will require a special key-clip that comes with the box, but it is easy to replace with a stationery clip or a thin needle. The main requirement for the tool is that it must be thin enough to enter the hole, but strong enough not to bend when pressed. Attention: do not use wide-eyed pins or blunt objects, as they can shatter the mechanism of the lock inside the case.

⚠️ Warning: Never insert foreign objects into the tray opening unless you are sure it is the extraction mechanism, not the microphone or sensor, to avoid short circuit.

The preparation process also involves cleaning the contacts of the card itself of dust and fatty traces that may have remained after being removed from the plastic. Wipe the golden chip with soft lilaless fabric, as contamination can cause an unstable signal or a complete failure of the device to detect the network. After preparation, you can proceed to directly extract the storage mechanism of the cards.

Types of trays and installation schemes in Xiaomi

Xiaomi has used several options for slots for memory cards over the years, and it's important to understand the differences between them before installation. The most common type is a combined tray, where one place is designed for the purpose of installing a memory card slot. SIM-The second can be used for either a second SIM or a microSD card. In such models, you need to choose the priority: two active links or one line plus an extension of internal memory.

There are also models with triple independent slot, where there are spaces for two. SIM-The cards and memory cards are separated and do not conflict with each other. SIM-It's a critical point to have the right angle of the bevelled corner of the card, because it's physically difficult to insert it incorrectly, but at high pressure, it's possible to do it right.

Below is a table to help identify your tray type by appearance and device model:

When you put it in a hybrid tray, there's often confusion as to which slot is responsible for what, so pay attention to the relief images on the metal holder itself. Usually, the map outlines are drawn indicating which cell is the main one (SIM 1) and which is the additional one. The orientation of the bevelled angle should always match the pattern on the tray, otherwise the map will simply not fall into the seat.

Step-by-step instructions: how to insert a card

The installation process requires precision and good vision, so it is recommended to perform the operation at the table in bright light, so that if small parts fall, they can be easily found. Take a key-clip and insert its point perpendicular to the hole at the end of the body, applying a moderate but confident force until the click of the mechanism. The tray should go out a few millimeters, after which it can be removed with your fingers by pulling over the edge.

Place the removed mechanism on a flat surface and place SIM-The map is in the appropriate recess, making sure that it lies flat and does not protrude beyond the edges of the frame, the bevelled corner of the card should perfectly match the shape of the cutout, and the golden contacts should look downward, towards the motherboard when installed. If the card is lying correctly, it will not stagger and its thickness will be level with the edges of the tray.

Insert the tray back into the body with great care, keeping the entry plane in order not to damage the internal contacts or the latch mechanism. Push the frame with your finger until the characteristic click, which signals that the lock is caught and the card is securely fixed inside the device. If the tray enters with difficulty, do not press it out and check for correct orientation, since resistance means an error in positioning.

After the physical installation, turn on your smartphone and wait for the operating system to load, which should automatically determine the new one. SIM-A map and a signal level in the status bar. PIN-code that defaults to 0000 or 1234, unless you've changed it before. If the network didn't show up right away, try restarting the device or turning flight mode on and off for forced network search.

⚠️ Note: If the tray does not enter to the end and protrudes from the case, in no case do not leave the phone in this state, as this can lead to moisture and dust entering the device.

Solving definition problems SIM-map

A situation where Xiaomi phone can’t see SIM-The card is not common after installation, but may be caused by software failures or contamination of contacts, the first step is to check whether the card is correctly installed, taking out the tray and making sure that there is no dust, pile or oxidation on the golden contacts. Sometimes it is enough to simply wipe the chip with an alcohol napkin and insert the card again so that the contact is restored.

If the physical installation is correct, but the network is missing, you should go to the settings of the mobile device and check the status. SIM-maps in the corresponding menu section. → SIM-maps and mobile networks will allow you to see if the card is active in the system, and if necessary, turn it on programmatically if it was disabled, you can select the preferred type of network from the same menu, for example, switch from the system to the system. 5G on 4G, If you have problems with the new standard in your area.

In cases where only one of the two cards is not working, try swapping them in the tray to prevent a particular reading slot from malfunctioning. Network reset software can also help if the problem lies in incorrect operator parameters stored in the system. To do this, go to the settings menu and find a reset point for Wi-Fi, mobile Internet and Bluetooth, which will not delete your personal data, but update your network profiles.

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Use the good old-fashioned reboot method: if the phone doesn’t see the network for a long time, completely turning off and turning on the device helps reset the radio module more effectively than just reconnecting the card.

Sometimes the problem lies in the very SIM-A card that may have demagnetized or malfunctioned due to old age, so the best way to diagnose it is to check the card on another phone. If the card works in another device, then the problem is in the Xiaomi smartphone, and you may need to update the firmware or reset to factory settings. In the opposite situation, when the card does not work anywhere, you need to contact the carrier salon to replace the media.

Features of working with two SIM-cards

Xiaomi smartphone owners often use two SIM-cards to separate work and personal calls or to save on tariffs of different operators. MIUI It allows you to flexibly set priorities, so you can choose which card will be used for mobile Internet by default and which will be used only for voice calls, which is convenient when one operator has unlimited traffic and another has free minutes on the network.

It is important to note that in most models the second slot can work in the mode. 2G/3G, While the first card is busy talking in mode 4G, If not enabled, VoLTE (Voice over) LTE) It allows you to conduct conversations through the fourth generation network without dropping the speed of the phone. 3G, But this function must be supported by your operator and activated in the phone settings. → SIM-maps and mobile networks → Use of the SIM-map.

With active use of two cards, the battery consumption can be slightly higher, since the radio module is forced to communicate with two base stations at the same time. If you are in a low-reception zone, the phone will constantly search for the network, which will significantly speed up the discharge, so in such situations it is recommended to temporarily turn off the unused SIM. Each card is managed independently, and you can change the redirection settings or roaming restrictions for each of them at any time.

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Proper setting of SIM-card priorities allows you to save money on traffic and extend the battery life of the smartphone in conditions of a weak signal.

Frequent Questions and Answers (FAQ)