Why Xiaomi doesn’t see why SIM-Map - full analysis of the causes and 10 working ways of correction

You put it in. SIM-Xiaomi card, but phone persistently ignores its existence? No network, no operators are identified, and the status bar is marked "Not available" SIM» Or "No Service"? This problem is familiar to many Redmi smartphone owners, POCO Mi – from budget models like Redmi 9A In 80% of cases, the fault is solved independently, but for this you need to accurately determine the source of the malfunction.

In this article, we will discuss all the possible reasons why Xiaomi may not see the SIM-From the usual misinstallation to serious hardware breakdowns, you will get step-by-step diagnostic instructions, checklists and a card compatibility table with popular models. And if the problem is deeper, you will find out when to contact the service and how much it will cost in 2026.

Don’t waste time on useless reboots! Start with the Quick Diagnostics section to find out the root of the problem in 5 minutes.

1. Quick diagnosis: 5 steps to identify the cause

Before you take your phone apart or carry it for repair, take this rapid test, which will help you weed out 90% of software causes and save you time.

• 🔍 Check your physical condition. SIM-maps: no chips, scratches or contamination on the contacts, especially vulnerable to nano-SIM cards, which are easily damaged when pruning.
• 📱 Reset the card: remove the tray, gently wipe the card and slot contacts with an alcohol napkin, then insert back. Make sure the card lies with the gold contacts down.
• 🔄 Reboot your smartphone: sometimes the glitch of the communication module is solved by a simple reboot. MIUI 14+ Use Forced Reboot: Squeeze Power + Volume up for 10 seconds.
• 📶 Check the other one. SIM: insert a work card from another operator, and if it's detected, your problem is SIM, If not, on the phone.
• 🛠️ Update the firmware: go to Settings → The phone. → System Update: Outdated software often conflicts with new communication standards (e.g., VoLTE or other communications standards). 5G).

If, after these manipulations, SIM If you still don't know, move on to the next section, pay special attention to item 3: if the phone doesn't see any of them. SIM-map, but Wi-Fi and Bluetooth are working – this is a sign of a malfunction of the communication module that requires repair.

2. Top.-7 Why Xiaomi doesn’t see the reason SIM-map

All the reasons can be divided into two groups: software (solved by settings or updates) and hardware (requires intervention in iron).

The most insidious reason is carrier incompatibility, for example, some Xiaomis for the Chinese market do not support bandwidth. LTE Band 20 (800 MHz), which uses Tele2 in Russia. Check the frequency support of your model on the website FrequencyCheck.

3. Software solutions: when the software is to blame

If the hardware is in order, but SIM It's not clear whether the problem is firmware or settings:

3.1. Resetting network settings

This method helps in 60% of communication failures. Go to:

→ SIM-maps and mobile networks → Network reset

After reset, the phone will restart, and all connection settings (including: APN) Warning: this will delete the stored Wi-Fi passwords!

Manual appendix APN

Sometimes the operator doesn't automatically transmit the settings. APN manually:

1. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Access points (APN).
2. Click "Add" and enter the parameters of your operator (they can be found on the official website, for example, for MTS it is Internet.mts.ru).
3. Save and restart the phone.

Make sure the fields are filled in correctly:

- Name: MTS/Beeline/MegaFon/Tele2

- APN: internet.mts.ru / internet.beeline.ru / internet / internet.tele2.ru

- Type of authentication: PAP or CHAP

- Type APN: default,supl

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3.3 Update the firmware through Fastboot

If OTA-Update doesn't help, try flashing your phone manually through Fastboot. It's a radical method, but it often solves problems with the communication module:

1. Download the latest version of MIUI for your model from en.miui.com.
2. Unpack the archive and connect the phone to your PC in Fastboot mode (clip Power + Volume down when turned on).
3. Launch the file. flash_all.bat (For Windows, use the command: fastboot flash all

⚠️ Attention: Fastboot firmware erases all data! pre-backup via Mi Cloud or TWRP (if established).

Recovery IMEI

If your Xiaomi is showing IMEI: Null, try to restore it through the engineering menu:

1. Click ##4636## and select Phone Information.
2. Scroll down to "Enable the radio" and restart the device.
3. If IMEI Not appearing, use the Maui program. META (requires root rights).

4. Hardware problems: when to disassemble the phone

If the software didn't work, it was hardware, and these are the most common hardware malfunctions and the ways to diagnose them.

4.1 Oxidation or damage to slot contacts

Symptoms: The phone periodically “loses” the network, SIM It is determined only after multiple reinstallation.

Decision:

• 🔧 Carefully clean the slot contacts with a stripe or alcohol (do not use metal objects!).
• 📌 If the contacts are bent, try straightening them with a thin needle (act carefully!).
• 🔄 If the slot is damaged, replace it (part cost: 300-800) ₽, work: 500-1500 ₽).

Communication module malfunction

Symptoms: The phone doesn't see any of them SIM-map, but Wi-Fi and Bluetooth work. In the engineering menu (#4636##) the status of the radio module is displayed as "Disabled».

Solution: only replacement of module in service. Average cost of repair:

• 💰 Redmi 9/10 series: 2500–3500 ₽
• 💰 POCO X3/X4: 3000–4000 ₽
• 💰 Xiaomi 12/13: 4000–6000 ₽

⚠️ Warning: If the phone was in a wet environment (for example, after rain or falling into water), do not turn it on! oxidation may spread to the motherboard. SIM and battery (if possible) and take it to the service.

Problems with the antenna track

Symptoms: weak network signal (1–2 divisions), frequent communication interruptions, although SIM determined.

Decision:

• 📡 Check the integrity of the antenna plumes (they are located under the back cover).
• 🔧 If the plumes are gone, solder them or replace them (cost: 800-2000). ₽).
• 📶 Install Network Signal Guru to diagnose signal strength.

💡

After the fall, the phone stopped seeing SIM, But the screen is intact -- don't be too excited. It's probably a chip on the communications module or a board that's cracked. It's impossible to repair yourself, and you need a soldering station and experience with the system. BGA-chip.

5. Features for specific Xiaomi models

Some Xiaomi models have unique "diseases" associated with the SIM-These are the most common ones:

5.1. Redmi Note 9/10/11 series

Problem: Hybrid slot (SIM + microSD is often broken by a fragile mechanism, and the phone only sees one of the symptoms. SIM or does not define a microSD.

Decision:

• 🔄 Try inserting. SIM in another slot if there is one).
• 🛠️ Replace the slot with a new one (cost: 500–1200) ₽).

5.2. POCO X3/X4/X5

Problem: Conflict with firmware based on Android 12+. After the upgrade, the phone can “forget” the network settings.

Decision:

• 🔄 Back on. MIUI 12.5 (if available).
• 📱 Install custom firmware (e.g. Pixel Experience).

5.3. Xiaomi Mi 11/12/13

Problem: Incompatibility with 5G-networks of some operators (for example, Yota or Tinkoff Mobile).

Decision:

• 📶 Manually select network mode 4G/3G/2G customized SIM.
• 🔄 Update the radio module with the Mi Flash Tool.

6.Essentials with eSIM on Xiaomi: What to do?

Xiaomi models 12T Pro, Xiaomi 13 and newer support eSIM, but they often come up with challenges:

• 📱 Phone does not see eSIM: make sure that your operator supports eSIM (in Russia it is MTS, Beeline, MegaFon, Tele2.
• 🔄 eSIM activated, but no network: restart your phone and check your settings APN (they can drop off).
• 🛠️ Failed to upload profile error: delete eSIM via Settings → SIM-map → eSIM → Remove and try to activate again.

To activate eSIM on Xiaomi:

1. Get it. QR-code or activation code from the operator.
2. Go to Settings. → SIM-maps and mobile networks → Add eSIM.
3. Scan the QR or enter the code manually.

⚠️ Note: On some models (Xiaomi 12 Lite, Redmi Note 11 Pro)+) eSIM only works in the first slot. If you have a hybrid slot, insert a physical slot. SIM second-place.

7. Where to turn if nothing has worked?

If you’ve tried all the methods, Xiaomi still doesn’t see SIM-It's time to call the experts:

7.1 Official Xiaomi service

Pros:

• ✅ Warranty repair (if the phone is warranty).
• ✅ Original spare parts.
• ✅ Diagnosis is free (if you repair them).

Cons:

• ❌ Expensive (replacement of communication module: 4000-8000) ₽).
• ❌ Long (repair period: 7-14 days).

Addresses of service centres: mi.com/ru/service.

Informal services

Pros:

• ✅ Cheaper (20-40%).
• ✅ Faster (1-3 days).
• ✅ Often offer used parts in good condition.

Cons:

• ❌ The risk of running into unqualified masters.
• ❌ No warranty for repairs.

How to choose a reliable service:

• 🔍 Check reviews on Yandex.Maps or 2GIS.
• 📸 Ask for photos of replacement parts (the originals have the Xiaomi logo).
• 💰 Compare prices: if repair costs 2 times cheaper than the average market price - this is a reason to be wary.

Self-repair

If you're confident, you can try to fix your phone yourself.

• 🔧 Set of screwdrivers (Torx) T3–T5, Phillips 000).
• 🔥 Solding station (to replace the communication module).
• 🛒 Spare parts with AliExpress or Mercado (for example, a tray for SIM).

💡

If you've never taken your phones apart, don't take the risk! Today's Xiaomis have fragile plumes and glue joints. A breakdown error can lead to additional breakdowns (such as tearing off the display plume).

8. Frequent Questions (FAQ)