Installation SIM-The cards in Xiaomi’s smartphone are a seemingly simple procedure, but even this can raise questions for a beginner, especially if it’s hybrid slots, nano-SIM instead of the usual micro-SIM, or models that support two SIM cards and a memory card at the same time. From map preparation to network signal validation, and consider common errors that can lead to a lack of communication.
It’s important to understand that the process can vary depending on the model. For example, the flagship Mi 13 and the budget Redmi Note 12 have different locations for the SIM card tray, and in some devices (for example, the POCO F5) slot is combined with the on button. We have compiled universal recommendations that will suit 90% of Xiaomi devices, and also highlighted features for popular series.
Preparation of SIM-card: what format is needed for Xiaomi
Before inserting the SIM, make sure it fits the size. Modern Xiaomi smartphones support only nano-SIM (4FF, 12.3×8.8 mm format). If you have an old-style card (micro-SIM or standard SIM), it will have to be cropped or replaced in the cabin of the operator. Note: some models (for example, Black Shark 5) require eSIM for a second SIM card - in this case, the physical slot can only be one.
To avoid mistakes, check:
- 🔍 Type of slot in your model: hybrid (SIM + microSD) or double-sim (2 SIM). For example, Redmi 10 has a hybrid slot, and Xiaomi 12 Pro – two separate slots under nano-SIM.
- 📱 eSIM support: relevant for flagships (Mi 13 series, Mix Fold) and check with the operator if it provides virtual SIM cards.
- ⚡ Contact status: If the SIM is scratched or bent, it is better to replace it - this can cause problems with network recognition.
Caution: If you cut the micro-SIM to nano-SIM yourself, only use a special template or scissors with accurate markings. A sloppy cropping can damage the chip and the SIM card will stop working.
Where is the slot for SIM-maps in Xiaomi
The slot location depends on the model, but 95% of the time it is on the right end of the device (when you look at the screen).
- 📱 Xiaomi Mi 11 Ultra and Mix 4: a slot on the bottom end next to the connector USB-C.
- 🎮 Black Shark 4/5: The slot is hidden under the lid on the upper end (you need to crack the latch).
- 📺 Xiaomi Pad 5/6: slot on the left end (similar to smartphones, but the tray is wider).
To open the tray, you'll need a paper clip or a special key (complete with your phone). If you don't have a key, an unbended paper clip or a blunt-ended needle will do. Don't use sharp objects, they can damage the slot's O-ring, which will cause dust or moisture.
| Xiaomi model | Slot location | Slot type | Features |
|---|---|---|---|
| Redmi Note 12 Pro+ | Right end | Hybrid (2 nano-SIM or 1 SIM + microSD) | A spring-powered tray – don’t push too hard |
| POCO F5 Pro | Right end | 2 nano-SIM (without microSD) | 5G support on both slots |
| Xiaomi 13 Lite | Right end | Hybrid | Metal-coated tray - magnetized |
| Black Shark 5 Pro | Upper end | 1 nano-SIM + eSIM | Remove the lid for access |
If you can’t find a slot, check the device instructions or use the official Xiaomi website where there is a slot. 3D-For example, for the Redmi Note 11, the slot is on the right, but it is almost invisible due to the black color of the body.
Step-by-step instruction: how to insert SIM-map
Now, let's get to the process. Follow the instructions to avoid mistakes.
- Turn off your smartphone. This is not necessary, but it is recommended to avoid accidental damage to the contacts when you remove the tray.Push and hold the power button, then select Turn off.
- Find the slot and insert the key. Put the paper clip in a small hole next to the slot before you click. The tray should extend 2 to 3 mm — pull it with your fingers.
- Place it. SIM-Notice the notch on the corner of the SIM card, which should match the shape of the socket. If you insert two SIM cards, place them in order. SIM1 and SIM2 (usually indicated on the tray).
- Put the tray back in. Squeeze it carefully until you click. Don't put too much effort into it -- if the tray doesn't come in, check if the SIM cards are correctly positioned.
- Turn on your phone and wait for network recognition. If the signal does not appear, restart the device or check the settings in the Settings section. → SIM-maps and mobile networks.
Is the smartphone off?|Is there a paper clip/key to remove the tray?|Does the size match? SIM-nano-SIM?|Is the SIM card correctly oriented on the bevel?|Is there any visible damage to the SIM card contacts?-->
If the phone does not see it after installing the SIM card, try:
- 🔄 Reset the device.
- 📶 Manually select the operator in the settings (Settings) → Mobile network → Network operators).
- 🔧 Update the firmware (Settings) → The phone. → Updating the system).
- 🛠️ Checking a SIM card on another phone – it may be the operator’s side of the problem.
Features of hybrid slots: SIM + microSD
Many Xiaomi models (e.g. Redmi) 9A, POCO M4 Pro) equipped with a hybrid slot where you can install either a second SIM-It's a card, or a microSD card, which means you can't use two SIM cards and add to the memory at the same time:
- 📱 Two. SIM-Cards (for example, for work and personal calls).
- 💾 One. SIM + microSD (if you need more space for photos and apps).
To reconfigure:
- Turn off the phone and remove the tray.
- Replace the second. SIM-MicroSD card (or vice versa).
- Turn on the device and wait for initialization.
- If you use microSD, format it as internal memory (in the Storage settings) to install applications.
What happens if you insert a microSD into a SIM2 slot without formatting?
Note: If you use microSD as internal memory, it cannot be retrieved without losing data.
Problems after installation SIM-maps and their solutions
Even if you do everything right, you can have problems.
| Problem. | Possible cause | Decision |
|---|---|---|
| The phone can't see. SIM-map | Incorrect installation, damaged SIM card, software failure | Reset the SIM card, check on another phone, reset the network settings (Settings → System → Resetting → Resetting mobile network settings) |
| No network (only emergency calls) | Non-activated SIM card, operator problems, incorrect APN settings | Check balance, contact the operator, set up APN manually (Settings → Mobile Network → Access Points (APN)) |
| SIM-The map is determined, but there is no Internet | Mobile Internet disabled, incorrect APN settings, operator restriction | Turn on mobile data, check APN settings (ask the operator), reboot the phone |
| Phone's asking. PUK-code | Three times incorrectly entered PIN-code | Enter. PUK-code (specified on the plastic SIM card holder or check with the operator) Warning: after 10 wrong attempts, the SIM card will be permanently blocked! |
If none of these methods worked, there may be a hardware problem (a slot or antenna module is damaged), in which case you can contact the service center, and for warranty devices, repairs will be free if the failure is not the fault of the user.
💡
If the phone stopped seeing the SIM card after falling or getting moisture, don't try to disassemble it yourself. Xiaomi uses adhesive joints and brittle plumes - unprofessional repairs can exacerbate the problem.
Setting up SIM-postcard
Once the SIM card is successfully installed, you need to configure it. → SIM-Maps and mobile networks and follow the following steps:
- 📞 Name it. SIM-cards (e.g., "Worker" and "Personal") to avoid confusion when calling.
- 🌐 Choose. SIM Mobile Internet (if you use two SIM cards).
- 📶 Activate. VoLTE/VoWiFi (voice-link 4G/Wi-Fi) This is not available to all operators.
- 🔄 Set up call forwarding if one of the SIM cards is unavailable.
For models with 5G support (e.g. Xiaomi 13 Pro, POCO F4 GT), check that 5G/4G/3G/2G (auto) mode is selected in the mobile network settings. If you leave only 4G, Internet speed will be limited.
💡
If you use two of them SIM-The cards, one of them will work. 4G, And the second is maximum. 3G (Limitation of hardware of most Xiaomi smartphones).
Frequent errors in installation SIM-maps in Xiaomi
Even experienced users sometimes make mistakes, and here are the most common ones:
- ❌ Using a micro-SIM without an adapter. Some try to insert a micro-SIM into a nano-SIM slot by cutting the plastic with scissors. This leads to jamming of the tray or damage to the contacts.
- ❌ Upside down SIM card installation. If the chip doesn't match the contacts in the slot, the phone won't see the card.
- ❌ Excessive force when inserting the tray, which can bend the metal guides, and the tray will cease to fix.
- ❌ Ignoring PUK-If you type it incorrectly 10 times, the SIM card will be locked forever, and you'll have to buy a new one.
⚠️ Warning: If you notice that the sealing ring (the rubber band on the edge) is damaged after removing the tray, do not use the phone in high humidity conditions. This can lead to water entering the case and corrosion of the contacts.
Another common mistake is using metal objects (needles, pins) to retrieve the tray, which can scratch the body or jam the mechanism, always use a plastic key from the kit or an unbended clip.