Why Xiaomi doesn’t see why SIM-Map: Complete guide to diagnosis and repair

Your Xiaomi suddenly stopped catching the network, and in the status bar flaunts the words “No communication services” or “No” SIM-The problem is found on all models, from the budget Redmi Note 12 to the flagship Xiaomi 14 Ultra, and there can be dozens of reasons, from banal contamination of contacts to serious hardware malfunctions. In this article, we will analyze all possible scenarios why Xiaomi does not see SIM-card, from software failures to physical damage to the slot, and give step-by-step instructions for eliminating each of them.

It is important to understand if the phone stops seeing SIM-If you fall, get moisture, or disassemble yourself, you're at high risk of mechanical damage, and if you do that, you're not going to need to be diagnosed at a service center, but 70 percent of the time, you're going to be able to solve the problem at home in 10 to 30 minutes. Let’s start with the simplest and most obvious checks – they often work even where users are already ready to carry the phone for repair.

Please note: if you are using eSIM (virtual) SIM-The diagnostic algorithm will be different, we will discuss this in a separate section, and note that on some models (for example, for example, the following, POCO F5 or Redmi K60) It could be a hybrid slot, where the second slot is combined with a memory card connector, so check if there's any conflict between the two. SIM microSD.

Basic checks: SIM-map, slot and phone settings

Before you dig deeper, make sure the problem isn't on the surface. Start with these steps -- they take less than a minute, but often solve the problem:

• 🔄 Restart the phone. It's trivial, but it works: temporary disruptions to the modem or operating system can block access to the phone. SIM-Press and hold the power button, select Reset (or Restart).
• 📱 Check the correct installation SIM-Remove the tray, make sure the card is inserted with gold contacts down and fits tightly to the connector. On some models (e.g. Xiaomi). 13T) The tray may have a non-standard shape - do not try to insert it by force.
• 🧹 Clear the contacts. SIM-Take an eraser (or soft fabric soaked in alcohol) and gently wipe the gold contacts on and inside the card. Don't use metal objects or abrasive materials - this will damage the coating!
• 🔧 Check the network mode. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Network type and make sure that the mode is selected 4G (preferably) or a car. Sometimes the phone hangs on 2G/3G, which leads to loss of communication.

If you don't have the network after this manipulation, move on to the next section, but first answer the question:

Pay special attention to hybrid slots. SIM-You can also try to remove the memory card at the same time, sometimes the phone can’t initialize both slots correctly. Also check if the settings have the option “Second Slot Priority” (relevant for Redmi 10 and older).

⚠️ Note: If after removal SIM-If you notice any scuffs, scratches or oxidation on the card, the problem is that it's there.

2. Software failures: resetting settings and software updates

If the hardware checks didn't work, the problem could be the software, and let's start with the safest method, which is to update the firmware.

Update MIUI last-minute

Modem malfunctions are often fixed in new firmware versions.To update Xiaomi:

1. Go to Settings → About the phone → System update.
2. Click on "Check Updates." If a new version is available, download it and install it.
3. After the update, be sure to restart the device.

If the update doesn’t help or the phone writes “No updates”, try manually installing firmware via Recovery:

For installation:

1. Turn off the phone.
2. Press the Power button + Volume up to enter Recovery.
3. Select Install update.zip to System (use volume buttons for navigation, power buttons for confirmation).
4. After installation, select Reboot.

Resetting network settings

Incorrect settings APN Network profile conflicts may block access to the SIM-To throw them off:

1. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Access points (APN).
2. Click on the three dots in the upper right corner and select "Reset to factory."
3. Reboot the phone.

If this doesn’t work, do a full reset of network settings:

1. Settings → Memory and backup copies → Resetting settings → Resetting Wi-Fi, Mobile Network and Bluetooth.
2. Confirm the action and restart the device.

⚠️ Attention: After discharge APN You may need to manually adjust the Internet settings (especially if you use MTS, Beeline or Tele2). Request the current settings from the operator or find them on its official website.

Reset to factory settings

If previous methods have failed, the last resort is hard reset, which will remove all data from your phone, so back up first.

To reset Xiaomi:

1. Go to Settings → About Phone → Resetting → Delete all data.
2. Enter a password (if requested) and confirm the action.
3. After the reset, the phone will reboot and prompt you to set it up as new.

If after discharge SIM-The card is working, the problem was in the application conflict or the system file conflict.

💡

Factory reset eliminates 90% of software failures, but does not help with physical damage to the communication module or antenna.

3.Problems with IMEI: How to check and restore

One of the most common reasons why Xiaomi doesn’t see SIM-card, is a loss or reset IMEI — a unique device identifier, which can occur after:

• Incorrect firmware (especially through Fastboot).
• Reset to factory settings on custom firmware.
• Interferences with system files (e.g., via Root).

To check the IMEI:

1. Dial on the phone keyboard *#06#.
2. If instead of a 15-digit code, you see a Null, Unknown, or blank field — IMEI erased.

For recovery. IMEI Xiaomi:

If IMEI lost, and the original code is unknown, it can only be restored by firmware through EDL-mode (requires an authorized Xiaomi account and special equipment), in this case, it is better to contact the service center.

4. Hardware malfunctions: slot, modem and antenna

If the software methods didn't work, the problem is probably hardware, and let's look at the most common hardware breakdowns and their signs.

4.1 Damage SIM-card

Symptoms:

• The phone doesn't see any of them. SIM-Cards (including knowingly working).
• SIM-The card is determined only after multiple extraction / insertion.
• On the screen appears a message "Insert" SIM-The map, despite its availability.

What to do:

• 🔍 Check the slot for bent contacts or oxidation. If the contacts are damaged, you will need to replace the connector.
• 📶 Check it out. SIM-If it doesn't work there, the card is defective.
• 🛠️ The cost of repair in the service is from 800 to 2000 rubles (depending on the model).

Failure of the modem or antenna

Symptoms:

• The phone sees. SIM-card, but does not catch the network (no signal or it is constantly lost).
• The settings display the message “Emergency Calls Only”.
• The problem appeared after a fall, moisture hit or disassembly of the phone.

Diagnosis:

1. Check if Wi-Fi and Bluetooth work, and if so, the problem is with the cell phone.
2. Enter the engineer menu (#4636###) and select Information → Phone Information: If the Network Type field is empty or shows Unknown, the modem is defective.
3. Check the status of the antenna contacts (in some models they are located under the back cover), oxidation or detachment of the contacts leads to loss of signal.

Decisions:

• 🔧 Reflash the modem (if the problem is software) This will require firmware via Fastboot or EDL.
• 📡 Silting antenna contacts (if they are gone) is a temporary solution - for a complete repair, you need to replace the antenna module.
• 🏥 Replace the modem (in the service center). The cost is from 2500 rubles.

⚠️ If the phone is no longer visible SIM-card after getting moisture, don't try to turn it on! Immediately remove the battery (if possible), dry the device in rice or silica gel for at least 24 hours, and then contact the service. Turning on a wet phone can cause a short circuit and damage the modem without the possibility of recovery.

Problems with the motherboard

If none of the previous methods worked, there may be serious damage to the board:

• 🔥 Modem power chain burnout (often after a failed firmware or voltage surge).
• 💧 Corrosion of tracks (after moisture is ingested).
• 🔌 Chip dump (e.g., microchip dump, RF-chip PMIC).

In such cases, diagnostics are required using a multimeter and microscope. Self-repair is almost impossible - contact the service with good reviews (preferably specializing in Xiaomi).

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If the phone stopped seeing SIM-card after installing custom firmware (for example, LineageOS or Pixel Experience), try to return stock MIUI. Many custom builds do not support working with two SIM-cards or have problems with the modem.

5. Features of eSIM: why Xiaomi does not see virtual SIM-map

If you are using eSIM (virtual) SIM-The diagnostic algorithm will be different. eSIM problems are most often associated with the:

• 📱 Incorrect activation (profile not loaded or not fully loaded).
• 🔄 Conflict with the physical SIM-card (on some models you can not use both at the same time).
• 📵 Blocking by the operator (for example, if you change the tariff or number).

To check the eSIM status:

1. Go to Settings. → SIM-maps and mobile networks → eSIM.
2. Make sure the profile is activated and the “Connected” status is displayed.
3. If the profile is missing, click “Add mobile tariff” and scan. QR-operator.

If the eSIM is not activated:

• 📞 Contact the operator – your profile may not be tied to yours. IMEI.
• 🔄 Restart your phone after setting up your profile.
• 📱 Reset your network settings (as described in section 2.2).

On some Xiaomi models (for example, Xiaomi 13 Pro or Xiaomi) POCO F4 GT) eSIM may conflict with physical SIM-- In this case, the map:

1. Extract the physical SIM-map.
2. Reboot the phone.
3. Check if the network is on eSIM.

6.Problems at the operator: blocking, roaming, technical work

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

• 📵 Lockdown SIM-If you haven't used a card in a long time (more than 3-6 months), the operator could deactivate it.
• 🌍 Roaming.If you are abroad, make sure that roaming is activated (in settings) SIM-card USSD-team, for example, *111*11# for MTS).
• 🔧 Technical work: check if the operator has any malfunctions (information is usually published on the official website or in social networks).
• 📱 Network incompatibility: Some carriers (e.g. Yota or Tinkoff Mobile) operate in non-standard bands. Make sure your Xiaomi supports the right frequencies (check on FrequencyCheck).

To check the status SIM-map:

• Call your number from another phone, and if you hear "Subscriber temporarily unavailable," the card is locked.
• Put it in. SIM-If it doesn't work there, it's a problem for the operator.

If SIM-The card is blocked, it can be restored:

• Through the operator's personal account (section "Management" SIM-map»).
• Calling in support (numbers: MTS - 0890, Beeline - 0611, MegaFon - 0500, Tele2 - 611).
• In the communication room (passport is required).

⚠️ Note: If you are using a corporate SIM-a card (for example, from work), it can be linked to a specific IMEI. When changing the phone or resetting IMEI The card will stop working. IT-liaison.

7. Firmware and modem: when flashing helps

If all previous methods have failed, you can still reflash the phone, which can help in cases where:

• Loss. IMEI post-refresh.
• Failure of the modem (for example, the phone sees) SIM-map, but not netting).
• Conflict after installing custom firmware.

You'll need firmware.

• Computer with installed Xiaomi drivers (official site).
• Mi Flash Tool (for Fastboot firmware)
• Firmware for your model (select a stable global version) MIUI).

Instructions for firmware through Fastboot:

1. Download and unpack the firmware (.tgz format).
2. Install the Mi Flash Tool and drivers.
3. Turn off the phone and press Volume Down + Power to log into the Fastboot.
4. Connect your phone to your PC via USB.
5. In the Mi Flash Tool, select the firmware folder and press Refresh. The device must be determined.
6. Select Clean All mode and press Flash.
7. Wait for the process to end (5-10 minutes) and restart the phone.

If the problem remains after the firmware:

• Try to flash another version. MIUI (For example, instead of the global one, Chinese or vice versa).
• Check if he's dropped off. IMEI (as described in section 3).
• If the phone doesn’t turn on after firmware, repeat the process by selecting Clean All and Lock mode.

💡

Fastboot firmware removes all data from your phone! pre-backup or retrieve the memory card.

8.When to contact the service: signs of serious breakdowns

If none of these methods worked, it's probably a hardware problem.

• 💥 The phone fell or was hit (microcracks on the board are possible).
• 💦 Moisture or condensate was getting in (even if the phone didn't sink, high humidity can cause corrosion).
• 🔥 Phone overheats or discharges quickly (a sign of modem power problems).
• 📡 The antenna is physically damaged (for example, after replacing the screen or back cover).
• 🔧 You took your phone off and then stopped working. SIM-map.

Cost of repair in the service:

When choosing a service, pay attention to:

• 📌 Official status: Service centers marked “Authorized Xiaomi” have access to original spare parts and firmware.
• 🔧 Warranty for repairs. Minimum term - 3 months.
• 💬 Check the ratings on Yandex.Maps or 2GIS.

⚠️ Note: If your Xiaomi warranty, do not open it yourself - this will void the warranty.

FAQ: Frequent questions about problems with SIM-mapping