SIM-The card is not determined in the Xiaomi phone: 10 causes and solutions [2026]

You put it in. SIM-A card in a Xiaomi slot, but the phone can't see it? It says, "No network," "Put in." SIM» The problem is found in 12% of smartphone users of the brand — from the budget Redmi Note 12 to the flagship Xiaomi 14 Ultra. 70% of the cases, the malfunction is associated with software failures, but sometimes hardware defects or even operator errors are to blame.

In this article, we will discuss all the possible reasons why Xiaomi does not read the article. SIM-From the common contamination of contacts to damage to the communication module, you will receive step-by-step instructions for diagnosis and repair, including hidden settings. MIUI, which are not described in the official documentation — FAQ Answering the most difficult questions, such as what to do if the phone stops seeing the second one. SIM post-firmware update.

1.Verification SIM-Maps: 3 Steps Before Repair

Before disassembling your phone or resetting your settings, make sure the problem isn’t in the problem itself. SIM-Here's a minimum checklist that will eliminate 30 percent of false positives:

• 🔄 Reset your phone. Hold the power button for 10 seconds before the menu appears, then select "Reboot." In 15 percent of cases, this solves the problem of the temporary failure of the communication module.
• 📱 Check it out. SIM Insert the card into the device of a friend or second device, if it does not work, the operator has a problem (see section 3).
• 🧹 Clean the contacts. Wipe the gold stripes on the contacts. SIM-A card with an alcohol napkin or a swallow, and the dirt or oxidation can block the signal.

If SIM It works on another phone, but it's not determined by Xiaomi — go to the next section. If the card is inactive even on another device, contact the operator by number:

⚠️ Attention: If SIM-The card is older than 5 years, its chip could wear out. Operators replace these cards for free in the communication salons - take a passport.

Hardware causes: from dirt to damage

If SIM-The card is good, but Xiaomi doesn't recognize it, because it's a physical malfunction:

Pollution or damage SIM-slot

Dust, moisture or mechanical particles can block the slot's contacts.Redmi 9A POCO X3 This problem is more common because of the open tray design:

1. Turn off the phone and remove the tray from the SIM-card.
2. Light the inside of the slot with a flashlight – look for oxidation (green plaque) or debris.
3. Gently wipe the contacts with a cotton swab soaked in isopropyl alcohol (do not use vodka or cologne!).
4. Blow the slot with compressed air (for example, a canister to clean the keyboard).

A critical mistake many users make is using metal objects (needles, paper clips) to clean.This scratches the contacts and can completely disable the slot.

Damage to the tray or contact group

In Xiaomi Mi 11 and the newer tray for SIM-The cards are made of a thin metal that bends easily, and if you drop your phone or press too hard when you insert a card, the contacts may have moved away from the board:

• 🔌 The phone sees. SIM only at a certain angle.
• 📶 The net appears and disappears when the tray moves.
• 🔍 Visible gaps between the tray and the body.

Solution: carefully bend the contacts of the tray with a flat screwdriver or contact the service. The average cost of repair is 800-1500 rubles.

Damage to the antenna module

If the phone doesn't see both SIM-cards at the same time, and Wi-Fi and Bluetooth work normally, there is a possibility of malfunction RF-This is typical of devices after falling or getting moisture:

• 📵 Total lack of network, even after restart.
• 🔄 Constant switching between 2G/3G/4G.
• ⚡ The network badge flashes gray.

It is impossible to repair the module yourself - soldering equipment and donor fees are required. Contact the Xiaomi service center or checked repair. The average replacement price is 2500-4000 rubles.

💡

Before visiting the service, make a backup copy of the data through Settings → The phone. → Backup. Repairs may require a complete reset.

3. Problems on the part of the communications operator

Sometimes it's not the phone that's the operator's fault. Here are 3 scenarios where SIM-The card stops working due to external factors:

• 🔄 Update of the tariff or change of owner: the operator may suspend the services due to non-payment or change of data.
• 📡 The station's maintenance work, and in that case, the problem will affect all subscribers in your area.
• 🔒 Lockdown IMEI. If the phone is listed in the database of stolen or was bought by the “gray” way, the operator can block access to the network.

How to check:

1. Put it in. SIM If the problem persists, call the operator.
2. Check the balance and status of services through USSD-commands (see table in section 1).
3. Check whether towers are being repaired in your area, on the operator's website or through a support chat.

⚠️ If you bought Xiaomi from hand, check it out. IMEI Enter the code *#06# to find the number. If the status of "Blacklisted" is a blacklisted phone.

4. Programmatic failures: from MIUI firmware

In 40 percent of cases, the problem is software, and this is especially true after updates. MIUI Or failed root-right experiments. Here are the key reasons:

Resetting network settings

Incorrect parameters APN or a conflict of network profiles may block access to SIM. To reset the settings:

1. Go to Settings. → SIM-maps and mobile networks.
2. Select “Reset Network Settings” (in some versions) MIUI item is called “Dumping” APN»).
3. Confirm the action and restart the phone.

After restarting, the phone will automatically load the correct settings. APN If that doesn't happen, add them manually:

Update to firmware

If the problem occurs after the update MIUI, It's possible the firmware contains a bug:

• 🔄 Reverse to the previous version. Use Fastboot or Recovery for downgrade (instructions for your model are available on the forum). 4PDA).
• 📥 Manual patch installation. Download the latest stable firmware from Xiaomi Firmware and run through Settings → The phone. → Updating the system → Three points. → Select a firmware file.
• 🔧 Reset to factory settings.Extreme measure if other methods didn't work!

Conflict with Dual SIM

In two-sim models (Redmi Note 11 Pro, Xiaomi) 13T) Sometimes there's a conflict between slots:

• Change it. SIM-cards in places (first in the second slot and vice versa).
• Turn off one of them. SIM in settings: Settings → SIM-maps and mobile networks → Choice SIM call-in.
• Update. IMEI for the second slot (engineering menu required, see Section 5).

5. Hidden MIUI settings: engineering menu

Xiaomi has a hidden engineering menu where you can diagnose problems with the SIM-To get there:

1. Open the phone app.
2. Enter the code ##4636##.
3. Select "Phone Information".

In this menu, pay attention to:

• IMEI: If Null or Unknown is used instead of the number, restoration is required (instruction below).
• Status. SIM: It should be Available if Absent is a problem in the slot or card.
• Network mode: if only specified GSM, 4G missing, check the settings APN.

If IMEI Remove it, restore it with help. MTK Engineering Mode (for MediaTek processors) or Qualcomm QPST (For Snapdragon, detailed guides are available on XDA Developers.

💡

If the engineering menu is displayed IMEI: Null, don't try to restore it without a backup! IMEI It can shut down the network forever.

6.Recovery after falling or moisture

If the phone falls, sinks or overheats, the problem is SIM-The card may be related to damage to the motherboard:

Diagnosis after fall

Signs of mechanical damage:

• 🔊 Crackling or squeaking when inserted SIM-map.
• 📱 Visible dents on the body near the slot.
• 🔋 Fast battery discharge (may indicate short circuit).

Solution: Take the phone apart and check the integrity of the antenna tracks on the board.

• Setting screwdrivers T3-T5.
• Plastic mediator to open the body.
• Loop or microscope (to examine the chips).

⚠️ WARNING: If you're unsure of your skills, don't disassemble the phone yourself! damage to the screen plume or battery can make repairs more expensive.

6.2. After moisture has been ingested

If Xiaomi was in contact with water, even if it didn't sink, the contacts could oxidize.

1. Turn off the phone immediately and remove it. SIM-map.
2. Place the device in a silica gel bag (out of a shoe box) for 24 to 48 hours.
3. After drying, clean the contacts of the slot and battery with alcohol.
4. Check the moisture indicator (red dot under the battery or in the slot) SIM). If it is red, a professional cleaning is required.

Important: Do not turn on the phone if it is wet! this can cause short circuit and damage to the processor.

7. Alternative solutions: eSIM and workarounds

If you are physically re-established SIM Failure to do so, consider alternatives:

7.1. Switching to eSIM

Xiaomi models 12T Pro, Xiaomi 13 and newer support virtual SIM-eSIM card benefits:

• 🔄 No need to insert a physical card.
• 📱 You can use two numbers at the same time (eSIM) + nano-SIM).
• 🔒 Protection against mechanical damage.

How to activate:

1. Get eSIM from the operator (support MTS, Beeline, MegaFon).
2. Go to Settings. → SIM-maps and mobile networks → Add eSIM.
3. Scan it. QR-code from the operator or enter data manually.

7.2 Use of Wi-Fi calls

If there is no network but there is access to Wi-Fi, turn on calls over the Internet:

1. Go to Settings. → SIM-maps and mobile networks → Additionally. → Wi-Fi calls.
2. Turn on the option and select your own. SIM-map.
3. Confirm activation (may be required) SMS operator).

Limitations:

• It works only with supported operators (MTS, MegaFon, Beeline).
• Requires a stable Internet connection (speed) >1 Mbps).

FAQ: Answers to Frequent Questions