Why Xiaomi doesn’t see why SIM-Map: full analysis of causes and solutions

You put it in. SIM-Xiaomi card, but the phone persistently does not see the network? Or does the device not respond to the installed SIM at all, although everything worked before? POCO — There are dozens of reasons, from a simple installation error to a serious hardware breakdown.

In this article, we will discuss all the possible reasons why Xiaomi does not see the SIM-From software failures to physical slot damage, you will learn how to diagnose the problem yourself, which settings to check first, and when to carry the phone to the service center. We also collected the latest solutions for 2026, including fixes for new models on HyperOS.

Don't panic: 80 percent of the time, you can fix the problem without repair. Start with simple steps, and only if they don't work, move on to more complex methods.

Verification of the physical installation SIM-map

The first thing to do is make sure that SIM-The card is properly installed in the tray, and even experienced users sometimes make mistakes when changing the SIM or cleaning the phone:

• 📱 Type SIM-Cards: Make sure you use nano-SIM (for most modern Xiaomi).The micro-SIM or hand-cut card may not be in contact with the chip.
• 🔄 Orientation: The chip should be downward, and the bevelled angle should be the same as the tray angle.
• 🧲 Magnetic contact: On some models (such as the Xiaomi 13 Pro), the tray is fixed by a magnet. If it is weakened, the SIM can shift.
• 🔍 Pollution: Dust, fibers, or oxidation on the tray or SIM contacts block the signal.

If you have recently dropped your phone or exposed it to moisture, check the tray for mechanical damage.Cracks or deformation of the plastic can lead to poor contact, in which case you will need to replace the module.

⚠️ Warning: Never use metal objects (needles, knives) to remove the tray.This can damage the micro-switch that detects the presence of a tray. SIM-Use only the original paper clip from the set.

2. Software failures: reboot and reset settings

If you're physically SIM-The map is fine, but Xiaomi still can't see it, and it could be software:

1. Restart the phone. Sometimes a temporary modem malfunction is solved by simply restarting. Press the power button and select Reboot.
2. Turn on/off flight mode. Go to the notification panel and activate Flight Mode for 30 seconds, then turn off. This will reset the network connection.
3. Update. Go to Settings → About Phone → Update and install the latest patches. Newer versions of HyperOS often fix modem bugs.

If simple measures don’t help, try resetting your network settings:

1. Go to Settings. → SIM-maps and mobile networks → Resetting network settings.
2. Confirm action. The phone will reboot and all network settings (including stored Wi-Fi) will be reset.

On models with duals SIM-cards (for example, Redmi Note 12 Pro)+) Check if the second slot is disabled in the settings. → SIM-maps and mobile networks → Name. SIM-Cards and make sure both slots are active.

3. Problems with firmware and modem

One of the most common reasons why Xiaomi doesn’t see SIM-card - corrupting the modem files or incorrect firmware:

• 🔄 Air-to-air updates" (OTA), faulty.
• 🛠️ Manual stitching through Fastboot or Recovery.
• 📱 Custom firmware installations (such as LineageOS or Pixel Experience).

To check the integrity of the modem:

1. Go to Settings → About Phone → MIUI version and tap 7 times on the kernel line to activate the developer mode.
2. Return to Settings → Additional → For developers and turn on Radio Log.
3. Install Network Signal Guru from Google Play and check modem status. If there are errors in the logs, such as: RIL_ERROR or MODEM_CRASH, The problem is the firmware.

Decisions:

• 🔧 Fly your phone through the Mi Flash Tool (instruction below). Use the official firmware for your Xiaomi model.
• 📡 Reset the modem settings via the engineering menu. Enter ##4636## in the dialer, select Phone Information and click Turn off the radio, then turn on again.

⚠️ Note: If you have installed custom recavers (for example, TWRP), Before you run the official software, you must return the stock recavator, otherwise the phone can turn into a brick".

Hardware malfunctions: from slot to antenna

If the software methods didn't work, it's probably hardware, and here's the most common breakdown.

To diagnose a hardware problem:

1. Try inserting. SIM-If it works, your Xiaomi is a problem.
2. Put another (knowingly working) SIM into your phone, and if you can't see it, it's a malfunction in the device.
3. Check if the phone is warm in the area. SIM-Overheating may indicate a short circuit.

Critical information: On models Xiaomi 12T, Redmi K50 and newer often found defect soldering antenna module. If the phone stopped seeing the SIM after falling, do not try to repair it yourself - requires professional soldering under the microscope.

5.Problems with the operator: blocking, registration, coverage

Sometimes the problem isn't with the phone, it's with the mobile phone.

• 📵 Lockdown IMEI: If the phone was bought by hand or brought from abroad, it could be blocked for non-payment (for example, from MTS or Beeline). IMEI operator's website.
• 🆔 Frequency incompatibility: Some Xiaomi models (especially Chinese versions) do not support Russian frequencies 4G (Band 7, 20, 38.Clarify your model specifications on FrequencyCheck.
• 🔄 Inactive SIM-card: If the SIM card has not been used for a long time (more than 6 months), the operator could deactivate it.
• 📡 Coverage problems: In some regions (such as the subway or remote areas), the network may not be available even when a SIM is working.

To avoid problems with the operator:

1. Put it in. SIM-card to another phone and check if it catches the network.
2. Call the operator number from another phone and check the status of your SIM.
3. If the phone is purchased abroad, check if it is unlocked for Russian carriers. To do this, type ##4636## in the dialer and select Phone Information. All standards (LTE/WCDMA/GSM) should be available in the Set preferred network type bar.

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If you are traveling abroad, turn roaming on in the settings: Settings → SIM-maps and mobile networks → Roaming. Some rates have it turned off by default.

6. Features of new models on HyperOS

In 2026, Xiaomi is actively transferring devices to the new firmware HyperOS, which replaced the new MIUI. The logic of working with the SIM-Maps, and some users are faced with bugs:

• 🔄 Automatic switching SIM: HyperOS has added Smart Switch, which can turn off the second SIM when the signal is weak. → SIM-maps and mobile networks → Smart switching.
• 📱 Absence of the “Only” option 4G": In the newer versions, the network selection menu is simplified to force on. 4G, Type in ##4636##, select Phone Information and manually install LTE only.
• 🔒 Blocking of uncertified SIM: On some models (e.g. Xiaomi 14), HyperOS can block SIMs from virtual operators (e.g. Tinkoff Mobile), the solution is to update the firmware or reset the network settings.

If after upgrading to HyperOS, the phone stopped seeing the SIM, try:

1. Reset network settings (Settings → Memory → Resetting → Network settings reset).
2. Reverse to the previous version of MIUI via Recovery (instructions on the 4PDA forum).
3. Contact the service center, if the problem persists - you may need to flash the modem part.

7. When to contact the service center?

If you’ve tried all the techniques in this article, Xiaomi still doesn’t see it. SIM-Here are the exact signs of hardware failure that you can't solve on your own:

• 🔌 The phone doesn't respond to any of the SIM-Cards (including knowingly working).
• 🔥 In the field SIM-tray feels overheating or the smell of burning.
• 📉 In the engineering menu (#4636##) modem status — OFFLINE or UNKNOWN.
• 🛠️ The phone was previously repaired (replacement of the screen, battery), after which the SIM device stopped working.

The cost of repair depends on the diagnosis:

• Replacement SIM-tray: 500-1500 ₽.
• Repair/replacement of antenna cable: 1500–3000 ₽.
• Modem chip soldering: 3000–8,000 ₽ (model-wise).
• Replacement of motherboard: 5000–15000 ₽ (on flagships of the type Xiaomi 13 Ultra).

Before the service visit:

1. Backup all data (photos, contacts, messages).
2. Write down the phone's IMEI (on the box or in About Phone settings).
3. Check if the service center has original parts for your model.

⚠️ Note: If your Xiaomi warranty is not open yourself and do not flash through the Fastboot. This will void the warranty. Contact the official Xiaomi service center - repair warranty will cost free.

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If the phone can't see SIM-If you drop a card or get moisture, don't pull it with repairs. Oxidation of the contacts can cause the modem chip to fail completely, and the cost of repairs will increase significantly.

FAQ: Frequent questions about problems with SIM-map