How to remove the lock from the number in the phone Xiaomi Redmi

The situation when the screen of the smartphone Xiaomi or Redmi suddenly requests PIN-code, and memory refuses to accept the usual numbers, can displace any user, often after restarting the device or installing a new one. SIM-Cards when the security system MIUI This is a way of activating protection against unauthorized access, and gadget owners are in a panic situation, especially if the code is forgotten and communication is urgently needed.

Blocking can be caused by a variety of reasons, from a simple error when entering a password to more serious problems with the operator’s network or software failures in the firmware. It is important not to panic and consistently check all possible solutions to the problem, from the simplest to complex technical manipulations. PIN-The code automatically blocks SIM-map requiring the use of PUK-code.

In this guide, we will explain in detail how to unlock a number on a Xiaomi Redmi phone using standard system tools and additional methods. You will learn where to find the necessary codes, how to interact with the settings menu correctly, and what to do if standard solutions do not help to return communication.

Types of SIM-card locks in MIUI

Before you start taking action, you need to be clear about what type of restriction you are facing. Android, based on the MIUI shell, distinguishes between several layers of protection, each of which requires a different approach.

The most common situation is the request. PIN-This is a four-digit password that the user sets himself to protect his SIM card, and if you haven't changed it, it's often a standard carrier code, like 0000 or 1234. However, you should not rely on standards, since security policies differ from provider to provider.

A more serious obstacle is the request. PUK-It comes after several failed attempts to enter. PIN-code. PUK (Personal Unblocking Key is a unique unlock key that cannot be changed or hand-picked, issued only by the carrier and stored in a database or on a plastic card issued when you purchase a SIM card.

• 🔒 PIN-code: user password from 4-8 Numbers for daily network access unlocking.
• 🔑 PUK-code: eight-digit key for emergency unlock after input errors PIN.
• 🚫 Network Blocking: A Limitation Imposed by the Operator for Phone Debt or Loss.

⚠️ Note: After ten incorrect attempts to enter PUK-code SIM-The card is locked forever. It's impossible to restore it, so you'll have to contact the communications room to get a replacement.

There is also the concept of blocking IMEI, If the phone is on a federal wanted list or has been stolen, the operator can lock the device at the network level. SIM-cards or phone flashing won’t help, as the ban hangs on the hardware ID Redmi.

Search PUK-unlockable

If your Xiaomi screen requires PUK-It's not possible to generate the code yourself, because it's part of a cryptographic algorithm to protect the SIM card, and there's no mistake in this process.

The most reliable source is a large-format plastic card, on which your original card was attached. SIM-The card on the back of this card, often under a protective layer, is printed. PIN and PUK If you save this envelope, you solve the problem in one minute. Type in an eight-digit code, then come up with a new one. PIN.

In the event of loss of the plastic base, the only legal way is to have a subscriber’s personal account or contact support. Big Three operators and virtual operators provide access to this data through their mobile applications or websites.

Note that commands can change and you may need to confirm via SMS to access your account. If the SIM card is blocked, the SMS will not come, so use Wi-Fi on Redmi or another phone to log in to your operator account. You can always find the current PUK in the Settings or Security section.

Instructions for entering unlock codes

The process of entering codes on Xiaomi and Redmi smartphones is standardized, but has its own nuances depending on the version of MIUI. When a request appears on the screen, the system waits for the exact digits input. Any extra action can be considered an error.

For input PUK-You'll have to click on the appropriate field and enter 8 digits, and then the system will ask you to come up with a new one. PIN-code (usually 4 digits) and confirm it by re-entering. PIN-It is important not to confuse the numbers, as the confirmation must be accurate.

If you successfully entered a PUK and a new PIN, the phone may need to reboot or reconnect itself to the network, at which point the encryption keys on the SIM card are updated. If an error message appears after entering the code, double-check the numbers. One wrong number reduces the number of attempts remaining.

In some cases, especially on older versions of Android, the input interface may be different. Instead of fields, there may be simple digital keyboards. The main rule is to take your time. In a hurry, it's easy to press the extra button. If you feel like your hands are shaking or you're nervous, you'd better put your phone down for a few minutes.

⚠️ Warning: Never try to guess. PUK-You only have 10 attempts to turn the SIM card into a useless piece of plastic.

Unlocking the lock through the engineering menu

For advanced users who are faced with software locking glitches, there is access to hidden phone functions. Android’s engineering menu allows you to control the parameters of the radio module. However, this method should be used with extreme caution, since changing the wrong parameters can disrupt communication.

To get to the menu, open the Phone app and type a special code. For most Xiaomi devices, it is ##4636##. Once the last digit is dialed, the menu should open automatically. If that doesn't happen, your firmware version may be blocking access to that section.

##4636##

From the menu that opens, select Phone Information. Scroll down to Set Preferred Network Type. Try changing network mode from LTE/TD-SCDMA to GSM only, for example, and then return it back. This action will force the radio to restart and may reset the locking flag if it was caused by a network failure.

You can also see the status of this menu. SIM-If it says "Absent" or "Unknown," the problem can be physical. Try to remove the SIM card tray, erase the contacts with a pin and insert them back. Often, contact oxidation is perceived by the system as a lock or no card.

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Before you enter the engineering menu, take a picture of the original settings. If you accidentally change an important parameter, the photo will help you to return everything to the same way.

Network settings and parameter reset

Sometimes the problem isn't with the SIM card itself, but with network settings that might have gone wrong after a MIUI upgrade or a power surge, and then resetting the network settings helps, and it won't delete your personal files, contacts, or apps, but it will bring your Wi-Fi, Bluetooth, and mobile settings back to factory values.

To perform the reset, go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. In some versions of the shell, the path may differ: Settings → Advanced Settings → Reset and Reset → Network Settings Reset. Confirm and wait for the communication modules to reboot.

After the reset, the phone may request again. PIN-This is a normal security response. Enter your code. If the problem was a software setting conflict, the connection should be restored. If the request is repeated indefinitely or the code is not received, the SIM card file system may be damaged.

In rare cases, manual setting of access points helps APN. Go to Settings. → SIM-maps and mobile networks → Select a SIM card. → Access points (APN). Press the reset button in the bottom menu or create a new access point with the options recommended by your operator. APN They can block data transmission, which the user sometimes perceives as a number lock.

Bypassing the lock via another phone

If you unlock the SIM card on Xiaomi does not work, and PUK-You have the code, you can use a clever but effective method: move the SIM card to any other phone (not necessarily Xiaomi). PUK-code and new PIN on someone else's device.

The key is that the change of security keys is done on the SIM card itself, not in the phone's memory. Once you successfully unlock the SIM card in another device, it will be fully operational. Then you can safely return it to your Redmi, and it will work without requesting codes, since the new PIN is already written.

This is especially true if your smartphone's touch screen is damaged or bugged and you can't physically enter the code exactly, it can be easier to do it on a push-button phone or other type of screen, and it also eliminates the possibility of software conflicts in the MIUI shell.

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Unlocking the SIM card in any other phone permanently removes the lock, as new keys are written into the card chip.