Xiaomi phone doesn't see SIM-Map: Complete Guide to Diagnostics and Repair

You put it in. SIM-A map in a Xiaomi smartphone, but the phone stubbornly ignores its existence? On the screen, the words "No network", "Insert" on the screen SIM-Is the card" or mobile icon crossed out? This is a problem that many Redmi device owners know, POCO And Mi ranges from budget models to flagships, and 80 percent of the time, you can fix the malfunction yourself without having to go to a service center.

The causes of the failure range from trivial contamination of contacts to serious hardware breakdowns, and in this article we will examine the unique nuances of Xiaomi (for example, MIUI firmware errors or hybrid slots), as well as checklists for diagnosis. Start with simple solutions — you may not even have to disassemble the phone.

Basic diagnosis: check in SIM-slot

Before you sin on the phone, make sure that the problem is not in the SIM-Start with the obvious:

• 🔄 Reboot your phone. Sometimes the modem malfunctions are fixed by simply restarting. Press the power button and select "Reboot».
• 📱 Check compatibility. SIM-Xiaomi devices support nano-SIM (3FF). If you have a micro-SIM (2FF) Mini-SIM (standard) should be trimmed or replaced.
• 🔍 Look at the contacts. SIM-Check if the metal part of the card has any scratches, dirt or oxidation.

If you are using a hybrid slot (for example, in Redmi Note 10 or in the Redmi Note). POCO X3), Make sure you don’t put two at the same time. SIM-microSD cards and memory cards. Most Xiaomi models support either «SIM + SIM», either «SIM + MicroSD, but not all three at the same time.

⚠️ Note: Do not use metal objects (needles, paper clips) to remove the tray SIM-If he's jammed, it could damage your contacts.

2. Software failures: resetting settings and software updates

If the hardware is fine, the problem may be in the software, most commonly:

• 🐞 Firmware errors (especially after updating) MIUI).
• 📵 Failure of the modem (for example, after installing custom software).
• 🔄 Network settings conflict (e.g. after manual operator selection).

Start with the safest method – reset network settings:

1. Go to Settings. → SIM-maps and mobile networks → Mobile network settings → Resetting settings.
2. Confirm the action. The phone will reboot.

If that doesn’t help, try updating the firmware:

1. Open Settings → About the phone → System update.
2. Click on “Check Updates” and install the latest version of MIUI.

Xiaomi Android 12+ models (such as Mi 12, Redmi Note 11) may require manual flashing via Fastboot or Recovery.This is a risky procedure - if you're not sure, you'd better contact the service.

Check the backup of contacts and SMS

Record the IMEI of your phone (type *#06#)

Make sure the battery is charged >50%

Disable two-factor authentication in Mi Account (if used)-->

Manual network management: operator choice and operating modes

Sometimes, Xiaomi’s phone doesn’t see it. SIM-a card due to incorrect network settings, for example, if you manually select an operator that is not supported in your region, or if you have incompatible network mode enabled (for example, 5G on a map that does not support it).

To fix this:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if there are several).
3. Click on “Network Select” and turn on “Automatically”.
4. In the Network Type section, try changing mode: 4G (preferably) for most modern maps; 3G if 4G does not catch (relevant to remote regions); 2G only if other modes do not work.

If the phone still can’t see the network, try manually selecting the operator:

1. In the same menu "Select Network" turn off "Automatically".
2. Wait until the phone finds the available networks (can take up to 2 minutes).
3. Select your operator manually (e.g., MTS RU, Beeline, etc.).

To clean the contacts:

1. Extract. SIM-card.
2. Take a soft eraser (for pencils) and gently rub the contacts on SIM-card and phone slot.
3. Remove the remnants of rubber crumb with a dry wipe or compressed air.
4. Put it in. SIM-card back and check the work.

If the contacts are bent, they can be straightened neatly with a thin plastic card (for example, a bank card).

5. IMEI verification and operator lock

If Xiaomi phone is not visible SIM-card after firmware or reset, possible loss IMEI. This is a unique device identifier without which the modem cannot connect to the network. IMEI so-so:

1. Dial on the phone keyboard *#06#.
2. If instead of a 15-digit code, you see a “Null” or an empty field, the IMEI is erased.

To restore the IMEI on Xiaomi, you will need:

1. Find out the original IMEI (it is listed on the box or under the battery if the phone is collapsible).
2. Use engineering menus or utilities like Maui META (for MediaTek processors) or QPST (for Qualcomm Snapdragon).

Also, the phone may be blocked by the operator (for example, if it was purchased on credit or under a contract). IMEI device.

6. Features of hybrid slots and two SIM-map

Many Xiaomi models (e.g. Redmi Note 10 Pro, POCO F3) They are equipped with hybrid slots, where the second slot can work with either nano-SIM or microSD. If you have not set your priorities correctly, the phone may not see one of the slots. SIM-map.

To set up the work of the two SIM-map:

1. Go to Settings. → SIM-maps and mobile networks → Management SIM-map.
2. Make sure both of you SIM-Cards activated (slider enabled).
3. Set network priority for each card (e.g., one for calls, one for the internet).
4. In the section “Switching” SIM-Select which card to use by default for calls, SMS mobile data.

If you are using microSD, remember:

• 📱 Second second SIM-The card will automatically turn off if you insert a memory card.
• 🔄 To get the other one back. SIM, Remove the microSD and restart the phone.

💡

If the phone often loses the network SIM-If you want to change the map, try to change them (SIM (1) more stable.

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

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

• 🔧 The phone doesn't see any of them. SIM-Cards (including knowingly working).
• 💧 A message appears on the screen «SIM-The card is damaged" or "incorrect SIM» (even after cleaning the contacts).
• 📡 The phone doesn't catch the net, but IMEI is displayed correctly, and SIM-map is determined in the settings.
• 🔥 The phone overheats in the area of the antenna module (upper part of the body).

The cost of repair depends on the diagnosis:

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

💡

Before visiting the service, make a backup of the data. During hardware repairs, you may need to completely reset the phone.

Frequent Questions (FAQ)