Owners of budget smartphones of the Chinese giant often face an unpleasant situation when after resetting settings or flashing the device meets them with a lock screen with the inscription "This device is locked." This issue is especially relevant for the popular model Redmi 8A, which, despite the affordable price, is equipped with a powerful system of protection of accounts. The appearance of such a message means that the phone is activated binding to Mi Account, and without entering a password from the previous owner or a complex procedure of unlocking access to the system will be limited.
Xiaomi’s security system is designed to protect user data in the event of a theft or loss of a gadget, but sometimes becomes an obstacle for the legitimate owner. This can happen if you bought a used phone and did not check its condition, forgot your password from your account or improperly reset to factory settings. In this article, we will analyze all possible scenarios for the occurrence of a lock and provide proven methods for its elimination for the Redmi 8A model.
Before you go into action, you need to clearly understand the type of security installed. The error "This device is locked" can indicate a bootloader lock or the activation of the Find Device function. In the first case, you will not be able to install custom firmware, in the second case, access to the operating system is completely closed. It is critical to determine at which stage of the boot the message appears before the MIUI logo or already during the initial setup of Android, depending on the choice of tool to restore the smartphone.
Reasons for the message about the lock on Redmi 8A
Understanding the root of a problem is half the success of solving it: MIUI’s security system is closely integrated with the manufacturer’s servers, which creates multiple levels of device authentication, and users are most often confronted with three main scenarios, each requiring a customized approach and a specific set of diagnostic tools.
The first and most common reason is the activated "Device Search" function, if you reset your settings or flash it in the Settings menu before resetting your settings. → Mi Account was enabled with Find Device option, phone automatically locked when first connected to the internet. Xiaomi servers check IMEI-The device code and, seeing the active binding, require authorization. Without entering the correct username and password, you can not log in, and you will see a screen requiring unlocking.
The second reason might be to buy a device that was previously credited or leased. In some regions, Redmi 8A was sold in the open-source market, and if the debt is not paid, the bank or carrier remotely locks the device. Also worth mentioning is the "gray" shipments, where sellers use corporate accounts to activate the devices, and then simply remove them from the list without removing the lock from the device itself, in which case the phone can lock at any time after the firmware update.
⚠️ Note: If you bought a phone with your hands and the seller claims that he "just forgot the password" but can't recover it, chances are high that the device was stolen or found.
The third option is a failure in the MIUI operating system itself or a malfunctioning installation of global firmware on the Chinese version of the device. When changing regional versions (for example, from CN to Global), the integrity of the system files responsible for verifying the account is often violated, which can result in the phone mistakenly believing itself to be locked even if there are no debts or thefts, in which case deep reset or reflashing with the original software helps.
Diagnostics of the status of the loader and account
Before running complex reset programs, you need to conduct a thorough diagnosis, which will save time and avoid unnecessary manipulation of the file system. Redmi 8A features certain features that can determine the type of lock, you will need to carefully monitor the behavior of the device in different modes of operation.
The first step is to enter Fastboot mode. To do this, turn off your smartphone completely, and then press the volume and power buttons at the same time. Hold them until an image appears with a hare repairing an android and saying FASTBOOT. If you see the sign in orange at the top of the screen, the bootloader is closed. This is standard for most users, but it prohibits installing modified software without official unlocking.
Next, check if the device responds to computer commands. Connect the phone in Fastboot mode to the PC through quality. USB-Open Windows Device Manager and search for Android Devices or Xiaomi Android. If the device is defined as Android Bootloader Interface, the phone is properly connected. If there are unknown devices with a yellow exclamation point in the list, you need to install Xiaomi drivers. USB Driver.
- 🔍 Check Network Status: If the phone requires Wi-Fi to unlock but doesn’t see the network, it may be a problem with the communication module or system failure.
- 🔍 Pay attention to the version. MIUI: version number can be seen in Recovery mode (click the volume up). + Chinese version of food (CN) Global and Global have different security algorithms.
- 🔍 Test for SIM-Insert the map SIM-If the phone says "SIM-locked" or requires a network unlock code, it's a separate type of lock from the carrier.
It is also important to check if the device is in Recovery mode with cyclic reboot. If you try to turn the phone on, you constantly fall into the Recovery or Fastboot menu, this may indicate damage to the boot or recovery system partition, in which case the software methods of unlocking the account may not work, and you will need a complete flashing through EDL mode.
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Use the original. USB-cable that comes with Redmi 8A. Cheap charging cables often lack data lines, leading to connection errors in diagnosis.
Official Unlocking Method through Mi Unlock
The most reliable and secure way to unlock the bootloader and gain full control of the device is to use the official Mi Unlock Tool. This method takes time, since Xiaomi’s security policy provides for a waiting period (usually 168 hours or 7 days) after you link your account to the device.
First, you need to register for a Mi Account and log in to it on the locked device itself. If the phone allows you to get to settings (for example, lock only on the desktop), insert SIM-map, connect to Wi-Fi and log in. Then go to Settings → The phone. → Version. MIUI and click 7 times on the build number to activate the developer menu. → For developers, find the Mi Unlock Status item and link your account.
After the wait period (at least 7 days from the moment of binding) you can start unlocking. Download the latest version of the Mi Unlock program from the official website. Run it on your computer, log in to the same Mi Account. Transfer the phone to Fastboot mode (down volume + power), connect to your PC and press the Unlock button in the program. The process will take a few minutes, after which the phone will be completely cleaned and unlocked.
| Procedure stage | User actions | Expected output |
|---|---|---|
| Preparation | Registration of Mi Account, login to the developer settings | Account tied to device |
| Waiting. | A pause of 168 hours (7 days) | Xiaomi server allows unlocking |
| Unlocking | Launch Mi Unlock, Fastboot Mode, Unlock Button | bootloader unlocked, data deleted |
| Finals. | First boot of the system | Clean system without blocking the account |
⚠️ Note: The official unlock process via Mi Unlock completely removes all data from the phone's internal memory. backup important files in advance if you have access to the system.
Reset FRP and bypass Google account
Often, after a Hard Reset, users not only face Mi Account lock, but also Google’s FRP (Factory Reset Protection) protection, a mechanism that requires you to enter a Google account that was synced to the phone before the reset. Redmi 8A has specific methods to bypass this protection, depending on the Android version and security patch.
One popular method is to exploit vulnerabilities in the special features menu or browser. For example, when you first set up, you can try to call the Google Assistant voice assistant (usually by pressing a button home or through accessibility settings) and open the browser or settings through it. Once you have set up, you can reset current applications or install specialized applications. APK-dumper FRP.
A more technical method involves using a computer and debugging over USB (ADB). If the phone managed to enable debugging (which is difficult to do on a locked device without special tricks), you can send a command to delete Google configuration files. The command looks something like this: adb shell pm clear com.google.android.googlequicksearchbox. However, on modern versions of MIUI this method is often closed, and more complex manipulation of test menus is required.
☑️ Checklist before reset FRP
It’s worth noting that FRP bypassing practices are constantly changing as Google closes security update vulnerabilities.What worked on the January 2023 security patch may not work on a newer one, so Redmi 8A owners should look for up-to-date video instructions or forums specific to their firmware version.
Use of EDL mode and firmware
If the software methods don’t help and the official method is not available (for example, you don’t remember the Mi Account password), the EDL option remains, which is a deep boot mode that allows you to reflash the device at a low level, bypassing standard security protocols.
To enter the mode EDL on the Redmi 8A Usually you need to disassemble the phone and close special contacts on the board (Test Points) when connecting. USB-There's also a software input through the cable. ADB adb reboot edl, but it only works if debugging is enabled USB. Got in EDL, The device is defined by the computer as Qualcomm HS-USB QDLoader 9008.
The firmware in this mode is carried out through the Mi Flash Tool. You will need to find the right firmware in.tgz format (Fastboot) or a special file for EDL. The process is as follows: unpack the archive with firmware, run Mi Flash, select the path to the files, press Refresh and Flash. It is important to choose the option "Clean all" for complete memory cleanup.
Example of command to check connection in EDL mode (via QPST or analogue)
The device must be defined in the Device Manager as a COM port.
Qualcomm HS-USB QDLoader 9008 (COMxx)⚠️ Attention: Use of the regime EDL And the firmware that's not original can cause a device (a "brick") to fail completely, and it can't be repaired software.