How to open SIM-Xiaomi Redmi card: all ways to unlock

You just put a new one in. SIM-Xiaomi Redmi card, but the phone insists on entering PUK-This problem is familiar to many owners of smartphones of the brand - especially after the update MIUI, Resetting or buying a used device: 80% of the time, it's not because of a hardware malfunction, but because of software settings or mobile operator lockdowns.

In this guide, we will discuss all working methods of unlocking. SIM-maps on the Redmi Note 10/11/12, Redmi 9/10 And other models, from basic checks to complex firmware manipulations, you'll learn how to get around the query. PUK-Important: some methods require access to the Internet or a computer, prepare them in advance.

Why Xiaomi Redmi doesn’t see the SIM-card or requires unlocking

Before you try to "hack" the lock, you need to understand its nature. SIM-The cards are divided into 3 categories:

• 🔒 Lockdown PUK/PIN — The phone needs to enter the code after 3 mis-entry PIN-This is protection by the operator (MTS, Beeline, Television).2), not a smartphone.
• 📵 Hardware malfunction – oxidation of the slot contacts, damage to the antenna or communication module (often after a drop or moisture hits).
• ⚙️ Software failures – incorrect network settings, firmware conflict with operator, or activation of the “Flight” mode at the system level.

The most common case is blocking. PUK. Many users confuse it with the “factory” lock of the smartphone, but these are different things. PUK-code-bound SIM-If you typed it wrong 10 times, the card will be permanently blocked, you will have to buy a new one from the operator.

⚠️ Attention: Never enter PUK-You only have 10 attempts. SIM-The card will become unworkable and the number may be lost.

A less obvious reason is the regional firmware binding: Xiaomi Redmi smartphones for China (CN models) often do not support Russian carriers out of the box, in which case you will need to flash to the global version of MIUI.

Method 1: Unlocking SIM-map PUK-code

If the phone requires you to enter PUK-code, then SIM-Card blocked after incorrect entry PIN. This code is issued with the card when you purchase it (usually on plastic media) or you can get it from the operator.

Instructions for unlocking:

1. On the lock screen will appear the request “Enter” PUK-code».
2. Please enter the code (usually 8 digits) if you don't know, call the operator or check the package. SIM-map.
3. After input PUK The system will ask you to install a new PIN-code (you can leave the field empty if you do not want to use the protection).
4. Reboot your smartphone — SIM-card should earn.

If you lost PUK-code, contact the operator:

⚠️ Note: Some operators (e.g. Yota) may request passport details for issuance PUK-If it's a code. SIM-The card is not issued for you, unlocking will be impossible.

Method 2: Check network settings in MIUI

If the phone doesn't require PUK, but SIM-The card is not defined or not network, the problem may be in the settings MIUI. This often happens after a system update or factory reset.

How to check:

• 📶 Go to Settings. → SIM-maps and mobile networks.
• 🔄 Make sure the mobile data switch is active.
• 📡 Click on the operator name and select Network Search – wait until it is completed.
• ⚙️ Check it out. APN-settings (access points) For most operators, they are set up automatically, but sometimes manual input is required.

If the operator is not automatically determined, try manually entering the APN:

1. Go to Settings. → SIM-maps and mobile networks → [yours SIM] → Access points (APN).
2. Click on “Add APN” and enter your carrier’s details (see the table below).
3. Save and restart the phone.

💡

If you don't have a network after manually entering the APN, try removing all the saved access points and restarting the phone, and the old settings sometimes conflict.

Method 3: Resetting network settings

If SIM-The map is determined, but the network is missing or permanently disappears, and resetting the network settings will help, which will delete all stored Wi-Fi, Bluetooth devices and mobile network settings, but will not affect personal data.

Instructions:

1. Open Settings → About the phone → Reset settings.
2. Select “Reset Network Settings” (not to be confused with a full reset!).
3. Confirm the action and wait for the reboot.
4. Insert after insertion PIN-code SIM-maps (if requested) and check the network.

This method helps in 60% of cases when the problem is caused by:

• 🔄 Conflict after update MIUI.
• 📱 Wrong setup of two SIM-Cards (if you use dual-SIM).
• 🛠️ «Beat network parameters after experiments with Engineering Mode.

⚠️ Note: On some Redmi models (e.g. Redmi Note 8 Pro), a network reset may cause a loss of network value. IMEI. Before the procedure, check it with the code *#06# and save it somewhere.

Method 4: Unlocking through Engineering Mode (for advanced)

If standard methods don’t work, you can try resetting your modem via an engineering menu, which is suitable for models running Qualcomm (Redmi Note 10/11, Redmi 9) and Mediatek (Redmi 8/8A).

Instructions for Qualcomm:

1. Open the Phone app and type ##4636##.
2. Select "Phone Information".
3. Scroll down and click Turn off radio.
4. Wait 30 seconds and press Turn on radio.
5. Reboot the phone.

For Mediatek:

1. Enter the phone application ##36446337##.
2. Go to Connectivity → BandMode.
3. Select “Reset to Default” and save.
4. Reset the device.

If the engineering menu is not available, try installing the MTK Engineering Mode app (for Mediatek) or the Shortcut Master app (for finding hidden menus).

Method 5: Reflashing to Global MIUI (for Chinese versions)

If your Xiaomi Redmi is purchased in China (models with a marker) CN In the title, it may not support the Russian SIM-This is because of regional restrictions, and you'll need to flash it to the global version. MIUI.

Step-by-step:

1. Download the official global firmware for your model from the Xiaomi Firmware website.
2. Unclick the file and rename it to update.zip.
3. Move it to the root folder of the phone’s internal memory.
4. Open the Update app and click on the three dots in the upper right corner.
5. Select “Select firmware file” and select update.zip.
6. Wait until the installation is complete (the phone will reboot several times).

After the firmware:

• 🔧 Reset your settings (Settings) → Additionally. → Resetting settings).
• 📶 Put it in. SIM-map and check the network.
• 🔄 If necessary, update the firmware to the latest version through OTA.

⚠️ Warning: Flashing voids warranty and can lead to data loss. On models with a locked bootloader (Redmi Note 12 and later) you will need to unlock through the Mi Unlock Tool, which takes up to 720 hours of waiting.

💡

Reflashing to the global MIUI — The only way to get the Chinese version of Redmi to work with the Russian SIM-There's no alternative but to buy a new phone.

What to do if nothing helps: hardware malfunctions

If all the software methods have been tried, and SIM-The card still doesn't work, the problem may be hardware.Typical hardware issues:

• 🔌 Oxidation of the slot contacts, especially after moisture is injected.
• 📶 Damage to the antenna module – the phone can “see» SIM-map, but not net.
• 🔧 Failure of the motherboard - after a fall or impact.
• 🔋 Power problems of the slot - if the phone does not recognize SIM-map.

Diagnosis:

1. Try inserting. SIM-Card to another phone – if it works, the problem is Redmi.
2. Check the slot for physical damage (curvature, contamination).
3. If the phone falls, inspect the case for cracks in the près antenna lines (usually on the sides).

Repair:

• 🛠️ Cleaning contacts - you can do it yourself with alcohol and cotton swab.
• 🔧 Replacement SIM-slot - will cost 500-1500 rubles in the service center.
• 📡 Antenna Diagnostics – if the network is lost in certain places.

The cost of repair in official Xiaomi services:

FAQ: Frequent questions about unlocking SIM-maps on Xiaomi Redmi