How to insert a SIM in Xiaomi: step-by-step instructions

The procedure for installing a carrier card in Xiaomi, Redmi or POCO smartphones seems elementary only at first glance, but modern models often have hybrid slots or require a specific approach to extracting the tray. Wrong actions can lead to damage to the contacts or even mechanical failure of the case, so it is important to clearly understand what type of tray is installed in your device.

In this article, we will discuss in detail all the nuances of the installation SIM-maps, from finding a hole to extract to software configuring two numbers so you can be sure of stable communication and mobile Internet operation.

Before you start to physically affect the case, you need to make sure that you are dealing with a card of the right size, since modern smartphones work exclusively with the Nano-SIM format, which is much smaller than the usual many old cards.

Some users mistakenly try to insert a card into a memory card slot or make excessive efforts, which is strictly prohibited by the design of modern gadgets and can lead to irreversible consequences.

Tool preparation and SIM format verification

The first step before inserting the SIM into the Android Xiaomi is to prepare the workplace and the necessary tools, since the procedure requires accuracy and good lighting. You will need a special clip, which usually comes with the phone, or its qualitative counterpart, as well as the card of the operator.

Pay attention to the size of your SIM-The cards, since Xiaomi devices of recent years of release support only the Nano-SIM format, which has the smallest dimensions among all existing standards. If you have a larger card with broken-out segments in your hands, you need to carefully separate the desired chip along the cut line, trying not to damage the golden contacts.

It is important to check the status of contacts on the card itself: if they have traces of oxidation or scratch, the connection may be unstable, and the card is better replaced from the operator.

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If the paperclip from the kit is lost, use a regular stationery clip, but make sure it is not too thin and does not bend inside the hole.

If you change your phone and a new one SIM-The card is not activated yet, make sure you have a passport to identify if activation requires a presence in the office, although it can most often be done online.

Search and extraction of the tray for SIM-map

The location of the SIM card slot can vary depending on the model of your Xiaomi smartphone, but in the vast majority of cases it is on one of the side ends of the device. On budget models with a fixed battery, the tray is most often located on the upper end or left, if you look at the screen.

To extract the tray, you need to find a small circular hole next to the elongated groove and carefully insert the tool into it until the characteristic click of the spring mechanism. You don't need to push with all your strength: a confident but gentle press enough that the tray is pushed out a few millimeters, after which it can be tucked with a nail.

⚠️ Warning: Never attempt to remove the tray using sharp objects like needles or pins, as they may break inside the mechanism or damage the internal components of the board.

There is a common misconception that the hole is SIM-The card is located on the lower end next to the charging connector, however, in modern Xiaomi models, only the speaker or microphone is usually located there. Carefully examine all the faces of the device to find the correct hole, which is often indicated by a small icon. SIM-maps next to him.

If the tray is not removed after the first press, try to slightly change the angle of inclination of the paper clip, but do not use excessive force, which can lead to jamming of the mechanism. In rare cases, the tray can be blocked by a software or mechanical defect, which requires contacting the service center.

Chip orientation and installation in the tray

Once you remove the tray, you'll see that it has a special notch that replicates the Nano-SIM contours, which makes it impossible to install correctly if you act carefully. The key here is the correct location of the chip: the golden contacts should look strictly downwards to the inside of the phone, and the bevelled angle of the card should coincide with the bevelled angle of the notch in the tray.

Many users make the mistake of placing the map with the contacts up, which leads to no signal, although the map will be physically inserted to the end. If you are in doubt, look at the drawing, often drawn directly to the tray or on the case next to it, which shows the correct orientation.

In hybrid slots that support either two SIM-card SIM And if you have one microSD card, it's important to choose the configuration you want in advance, and if you're planning to use the memory card, the second SIM card won't physically be able to fit into the device, because they share the same space.

Make sure the card sits tightly in its guides and doesn't hang around, as vibration when the phone is running or falling can shift a poorly secured SIM and the contact will disappear.The tray should close easily, with no visible gaps and protrusions of the card beyond it.

Insert tray and primary activation

Returning the tray back to the body requires a certain sequence of actions to avoid damaging the contacts inside the phone. The tray must be inserted by the same side that it was removed, smoothly guiding it deep into the body until the slight click of the locker.

You don't have to force the tray, because if it doesn't come in smoothly, it's skewed or upside down, and you have to try again, you have to take it back out beforehand, and if you have a properly installed tray, it becomes flush with the body and has no protruding parts.

After physical installation of the card, you need to turn on the smartphone or wait for the network to register if the phone was turned on, which usually takes 10 to 30 seconds, and the signal level indicators and the operator name should appear on the screen, indicating the successful installation and reading of data.

If the device is turned on, it says no SIM-"Master" or "Put in" SIM-Try gently wipe the contacts of the card with a soft dry cloth and repeat the installation procedure. Sometimes oxidation or dust on the contacts prevents normal connection to the phone reader.

Setting up two SIM-card MIUI HyperOS

Modern Xiaomi smartphones allow you to flexibly configure the work of two SIM cards, distributing between them the functions of calls and mobile Internet to optimize costs. SIM-Maps and mobile networks where both slots are displayed.

In this section, you can assign one card to the default card for voice calls, and the other to use the mobile Internet, which is especially true if there are tariffs with different coverage or cost of a minute. SIM-A map that automatically switches the internet to a better signal card if the current network loses connection.

You can also rename SIM cards with clear names like “Work” or “Personal” to avoid confusion when making calls through a standard call, which makes it easier to visually experience the interface, especially when notifications from different operators come to the screen.

For users who travel frequently, setting a traffic limit or turning off a second SIM card in roaming is useful to avoid accidental charges, all of which are in one place and allow you to fully control communication costs.

Typical problems and methods of their solution

Despite the simplicity of the procedure, users sometimes encounter a situation where the phone stops seeing the SIM card immediately after installation or restart. One of the frequent reasons is a software failure of the communication module, which is solved by resetting network settings or switching the mode of operation to Settings. → SIM-map → Type of network.

If the phone says "Unknown" SIM-This may indicate that the card is blocked. PIN-code or physical damage, the first one requires input PUK-code, which can be found in the contract with the operator or in the personal account on the provider's website.

⚠️ Attention: Introducing incorrect PUK-More than three times will result in a complete lock. SIM-cards and it can be restored only by re-releasing a new one from the operator.

In rare cases, the problem lies in the tray itself or the phone’s contact group, especially if the device has previously been exposed to moisture or impacts. If replacing the SIM card with another one from the same operator does not help, a hardware diagnosis at the service center is likely required.

Another common problem is incompatibility of frequencies or map formats if you use a very old one. SIM-In such cases, the rough edges may interfere with the tight fit, and it is better to contact the communication salon for a free replacement with a new Nano-SIM.

Security and card retrieval with the phone on

Although modern standards allow you to extract and insert SIM-The card is hot, that is, without turning off the phone, it is often not recommended to do this to avoid software errors. Android operating system may incorrectly redistribute resources, which will lead to the temporary disappearance of the network or the need to restart.

If you plan to remove the card for use in another device, it is better to pre-disable the slot programmatically through the settings, selecting the "Disable" option next to the desired SIM card, and then you can safely remove the tray without fear of damaging the file system of contacts or messages stored on the card.

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Extraction SIM-cards on the phone on are safe only in emergency cases; for a planned replacement, it is better to turn off the device or turn off the slot in the settings.

Remember that on SIM-The card may store important data such as contacts and SMS, So before extracting, make sure that they are synced to your Google account or copied to your phone's memory, and that will prevent you from losing important information if you manipulate the chip.

Regular checks of contacts and careful handling of the tray will prolong the life of your Xiaomi and ensure stable communication in any situation.