The process of unlocking the bootloader on a Xiaomi Redmi 4X device is a fundamental step for users planning to gain full control of the operating system, which opens up access to custom recaps, superuser rights, and global firmware installations, but it is worth noting that this process requires careful attention, as it affects the low-level security settings of the gadget.
Owners of this popular smartphone often face restrictions imposed by the manufacturer to protect user data, bypassing these restrictions allows you to modify system files and change the appearance of the interface beyond recognition, it is important to realize that all manipulations you make at your own risk, and theoretically this can affect warranty obligations.
Before we take action, we need to prepare software and accounts. Without a properly configured Mi Account account and an installed ADB driver, the next steps will not be possible. We will look at all the nuances, including bypassing the waiting timer, which often confuses beginners.
⚠️ Warning: The bootloader unlock procedure completely erases all user data from the device's internal memory. Be sure to back up photos, contacts and documents before starting work.
Preparation of the device and the Mi Account
The first step is to properly configure the Redmi 4X smartphone itself, and you need to link your current device to your account in the Xiaomi ecosystem, and this is done through the settings menu, where you want to activate the developer status and allow debugging over USB, and without this step, the unlock utility simply won't see the phone.
Go to Settings → About Phone and quickly click 7 times on the MIUI Version field. After you notice that you have become a developer, go to the advanced settings. You need to find the Developer Item and activate the USB Debugging and Factory Unlock Toggles.
You want to link your account. In the same menu, find the Mi Unlock Status option and click on it. SIM-Make sure that the mobile Internet is active, not Wi-Fi, otherwise the link may not pass the first time.
⚠️ Note: Once you have your account linked to your device, you have to wait a certain amount of time, usually 168 hours (7 days), but sometimes the timer can be shortened or increased by security.
Don't try to log out or reset your account immediately after you've tied it, it will reset your wait timer, it will take place naturally while your phone is online and on at least periodically, and only after the wait period has expired will the utility on your computer give you the go-ahead to unlock.
Installation of drivers and preparation of PC
Successful communication between your computer and Redmi 4X requires the right driver base. Windows can automatically install the basic drivers, but Fastboot mode often requires specific components. It is recommended to download the official Mi Unlock Tool package from the developer's website, as it already contains the necessary files.
When installing the utility on your computer, you will be asked to install the ADB and Fastboot drivers. Accept this proposal. If you use third-party tools, make sure that the device manager displays an Android Bootloader Interface device without exclamation points when you connect your smartphone in bootloader mode.
Quality USB-And the cable is critical to connection stability, because cheap cables that only support charging won't be suitable for data transmission, and use the original wire or certified analogue, connecting it directly to the motherboard port, bypassing it. USB-hub.
☑️ Checking readiness for unlocking
Unlocking process through Mi Unlock
Once the waiting timer has expired, you can move to the practical part: run the Mi Unlock utility on your computer and log in to the same account that is attached to the smartphone, the program will check the status of the device and confirm the possibility of performing the operation.
Put Redmi 4X into Fastboot mode. Turn off the phone completely, then press the Volume Down and Power buttons simultaneously. Hold them until an image of a hare repairing an android appears. Connect the device with a cable to your PC.
In the program window, press Unlock. You'll see a warning that all data will be deleted. Confirm the action. It takes a few seconds, after which the phone automatically restarts and starts cleaning the data. On the smartphone screen, you'll see the progress bar.
Starting unlock...
Unlocking... Success!If it went well, you'll see a message called Unlocked successfully, the device will restart with the bootloader unlocked, the system can be configured longer than usual when you first boot it, which is normal, and now your Xiaomi has access to a system modification.
Solving common mistakes
Often users experience a Couldn't verify device or Current account is different error. The first one occurs if the accounts on the phone and in the program do not match; the second one may appear if you change your password or account region while waiting; in such cases, you need to re-assign the device, which will start the timer again.
Another common problem is 99 percent freeze or server error, which can be due to Xiaomi server congestion or unstable Internet. Try using mobile Internet on a PC (phone handset) or changing the phone. DNS-servers on 8.8.8.8.
| Error code | Probable cause | Decision-making |
|---|---|---|
| 10008 | Unstable connection | Replace. USB-cable |
| 20003 | Accounts don't match. | Check the entrance to the Mi Account |
| 30005 | Timer hasn't expired. | Wait for the end of the lock period |
| 40001 | Server busy | Try again in a few minutes. |
If the error persists after several attempts, try using another computer. Sometimes a conflict of Windows versions or antivirus software will block the Fastboot drivers.
Secret method of bypassing the timer
Installation of custom TWRP Recovery
Once successfully unlocked, the logical continuation will be the installation of a modified TWRP bootloader. This will allow you to install firmware, make full backups and obtain root rights. There are many stable builds for Redmi 4X (codename santoni).
Download the current twrp.img image file for your model. Place it in the ADB tool folder on your computer. Put your phone in Fastboot mode and connect to your PC. Open the command line in this folder.
Run a command to check the connection:
fastboot devicesIf a serial number appears, enter the firmware command:
fastboot flash recovery twrp.imgIt is important to avoid automatic reboots immediately after firmware, otherwise standard recavers may overwrite TWRP. Use a combination of buttons to enter recovery mode manually.
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Use the command "fastboot boot twrp.img" to temporarily run the recovery without writing to memory. This safely tests the operation of TWRP before installation.
Security and Consequences of Unblocking
The unlocked bootloader changes the security status of the device. Some banking applications and services, such as Google Pay (now Google Wallet) or Mi Pay, may stop working properly due to a system integrity breach, which would require patches like Magisk and root-rights hiding settings to bypass.
Also worth noting is the decrease in overall data security: If the phone falls into the hands of an attacker, an unlocked bootloader will theoretically make it easier to access the data, although having a password on the lock screen is still a serious barrier.
Return to the original state is possible only by completely flashing stock firmware through Fastboot mode using the Mi Flash Tool utility and the Clean All option. This will block the bootloader again, but will return the warranty and operation of all services.