How to unlock a number on Xiaomi: the complete guide

The situation when your favorite smartphone Xiaomi suddenly ceases to see the network or requires an unlock code, can knock out any user. SIM-maps or specific operating system settings MIUI. Understanding the nature of the lock is the first step to quickly reconnecting, and that’s what we’re going to be looking at.

Blocking a number can manifest itself in different ways: from a simple requirement to enter PIN-code until there is no signal with the inscription "SIM-In some cases, the device may work but not allow outgoing calls. It is important not to panic and consistently check for all possible causes, from banal debts to the operator to more complex scenarios with regional restrictions.

In this article, we will take a detailed look at the algorithms for different types of locks. PUK-codes, what to do if the phone is locked under a specific operator, and how to safely change the region in the settings of Xiaomi to avoid network problems in the future.

The main reasons for blocking SIM-maps on Xiaomi smartphones

Before taking action, the source of the problem must be clearly identified. SIM Most often initiated by the carrier itself or Android security mechanisms to prevent unauthorized access. PIN-code when turning on the phone.

If you have made a mistake three times in the input PIN, The system automatically blocks the card and requests PUK-It's a standard security measure, and you can't get around it without a special code, and it's also worth considering that some Redmi and Poco models may have software conflicts after a firmware update, where the erroneously phone identifies the card as locked.

⚠️ Warning: Never try to guess. PUK-Ten failed attempts will lead to permanent lockdown SIM-cards and it can be restored only by re-releasing the operator.

Another reason could be a carrier lockdown due to suspicious activity or an unpaid bill, and in rare cases, the problem is physical damage to the SIM contacts or the slot itself in the Xiaomi device.

• 🔒 Triple misentry PIN-code-start.
• 📉 Blocking by the operator for debts or suspicious activities.
• 🌍 Regional restrictions (relevant to Chinese versions).
• 🛠 Software failure after update MIUI.

Unlocking through PUK-code: step-by-step instructions

If your Xiaomi needs PUK-code, so the protection is activated at the chip level SIM-This code is unique to each SIM and has nothing to do with the SIM. PIN-You can find it on a plastic card holder that came with the SIM card.

Enter the code, usually 8 digits, into the field that appears, and after you have successfully entered it, the system will prompt you to come up with a new one. PIN-It is important to remember or write a new combination, as it will be requested every time you turn on your phone unless you turn off this feature in the settings.

Entering the PUK: 12345678


New PIN: 0000




Repeat PIN: 0000

If the plastic backbone is lost, don't despair. The telecom operators have made it possible to recover the code through their personal account or support, which is a standard procedure that takes a few minutes.

It is important to note that after entering the correct PUK-code-change PIN, Xiaomi phone may require a reboot to properly log in to the network.If after these actions the network does not appear, check if the flight mode is on.

What to do if your phone is locked by a network operator

Network Lock is less common, but it is more troublesome, and it is true for devices bought abroad or brought from other countries where the phones are sold under contract, in which case Xiaomi will only work with SIM cards of a particular provider.

When you install another SIM card, you will be asked to enter a network unlock code (NCK) on the screen. Unlike PIN/PUK, this code is tied to a particular IMEI device, and it is almost impossible to generate it on your own, since the encryption algorithms differ from operator to operator.

⚠️ Attention: Free unlock code generators from the Internet are 99% blocked from the entry counter, and then you can only unlock the phone for a fee through service centers.

The official solution is to go to the operator who owns the phone, but if the device is bought from hand or brought from abroad, that path may be closed, leaving only the search for specialized IMEI unlocking services.

For owners of Chinese versions of Xiaomi, there is a concept of “regional lock”: when activating the phone outside of China (or the country of sale), you may need to call a local service center or use special patches when flashing.

Change region and set up network to MIUI

Often, the “locking” problem is solved by simply changing the region in the system settings, especially if you are using a global firmware version on a Chinese device or faced restrictions after an update. MIUI algorithm can block some communication functions if the SIM card region and phone settings do not match.

Go to the settings menu and find Additional → Region. Select the country corresponding to your location or the region of issue of the SIM card. Once you change region, the phone will automatically restart the communication module.

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If the change of region did not help, try the settings. SIM-manually select the type of network (for example, only LTE or 3G), to eliminate the software conflict of communication standards.

It is also worth checking the settings of the preferred network type. Sometimes automatic choice of mode (5G/4G/3G/2G) fails. Forced switching to 4G only can stabilize the connection and remove the locking label if it is caused by an unstable signal.

Remember that after a region change, some system applications can change their behavior or the location of icons. This is a normal reaction of Xiaomi to changing the geolocation settings.

Using the Engineering Menu for Diagnostics

To get a deeper look at the problem, you can use the engineering menu, which is a hidden part of the system that's designed to test the hardware, and to get there, open the Phone app and type in the combination ##4636##.

In the menu that opens, select Phone Information. Here you can see the status. SIM-map, signal strength and network status if in the "State" field SIM" Unknown" or "Unconnected" is indicated, try clicking the Turn on radio button if available.

Command to enter: ##4636##


Section: Phone information




Action: Checking the SIM Status

You can reset your radio settings from the same menu, and you can select your preferred network type, like LTE Only, wait a few seconds, and then return the LTE/TD-SCDMA/GSM (or similar for your region), which restarts the modem without restarting the phone.

Radical measures: resetting network settings and firmware

If the software methods didn’t help, it remains to reset the network settings.This action will delete all saved APN access points, Wi-Fi passwords and Bluetooth settings, but often solves problems with network registration. Go to Settings path → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth.

In extreme cases, when the lock is caused by a critical firmware failure, it may be necessary to completely flash the device through Fastboot mode. However, this method requires an unlocked bootloader and an official Mi Flash Tool utility.

⚠️ Note: Flashing a phone with a locked bootloader is impossible without official unlocking, which requires waiting 168 hours (7 days) after submitting an application to Xiaomi.

Before you decide to flash, make sure that the problem is not the physical breakdown of the antenna module "SIM-Card blocked or no network, most likely need repairs at the service center.

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Network reset is a secure procedure that does not delete your personal files (photos, contacts), but requires reconfiguring your Internet connection.