Owning a Xiaomi smartphone offers a lot of opportunities, but the standard MIUI shell does not always satisfy the needs of advanced enthusiasts. Many owners of the popular Redmi Note 9 Pro (codename: curtana) model want to gain full control of the system to install custom firmware, remove system debris or overclock the processor. The key to these features is an unlocked bootloader, which is blocked by the manufacturer by default for security reasons.
The procedure for unblocking requires careful and careful follow-up to the algorithm, as any errors can lead to software failures. In this article, we will discuss all the steps from applying for MIUI to using the Mi Unlock Tool utility. You will learn how to properly prepare the device, what drivers are necessary and how to avoid the typical mistakes that beginners face when modifying software.
Unlocking the bootloader is an irreversible guarantee in some regions, and it also entails a complete data cleanup. The process of unlocking on the Redmi Note 9 Pro requires a mandatory wait of 7 to 168 hours after submitting an application in the Mi Unlock app.
Preparation of the device and account Mi
The first and most important step is to link your Mi Account to the device. Without this step, Xiaomi servers will not be able to verify the unlock rights, and the utility will give an error. Go to the phone settings menu, select the About Phone section, and click on the MIUI version several times to activate the developer mode.
Once you activate the hidden menu, go to the advanced system settings. Find the "Developer" option and turn on the "Debug over USB" option, which will allow the computer to exchange commands with the phone. Next, in the same menu, find the "Mi Unlock Device Status" line and click "Add Account and Device." Make sure the phone is connected to the mobile Internet or Wi-Fi, as the binding is online.
- 📱 Make sure the battery is over 60% so that the phone doesn’t turn off at a critical moment.
- 🔒 Use the same Mi Account that will be used in the Mi Unlock program on PC.
- 💾 Make a full backup of all important data as the phone will be completely cleaned.
It's important to understand that the binding doesn't always go away the first time. If you see an error message or a timer, try switching to mobile Internet, turning off Wi-Fi and repeating the procedure. SIM-The other operator's cards sometimes help bypass the server's time limits.
Installation of drivers and preparation of PC
For a successful computer communication with your Redmi Note 9 Pro in bootloader mode, specialized drivers are needed. Standard Windows drivers often do not recognize the device in Fastboot or ADB mode. It is recommended to download and install the official Xiaomi USB Drivers package or use universal Google ADB drivers.
After installing the drivers, you need to download the official Mi Unlock Tool utility. Download the program only from the official website miui.com/unlock to avoid malware. Unpack the archive in the root folder of the disk, for example, C:\MiUnlock, as paths with Cyrillic or spaces can cause malfunctions in the software.
Run the program on behalf of the administrator and log in to your Mi Account. The utility will check the server status and confirm authorization. If the program requires an update, agree, as older versions may not support the security protocols of new versions of MIUI installed on the Redmi Note 9 Pro.
☑️ Verification of PC readiness
Translation of the smartphone to Fastboot mode
To start the unlocking process, the phone must be in a special diagnostic and firmware mode known as Fastboot. In this mode, the device does not load the operating system, but waits for commands from the computer. On the Redmi Note 9 Pro, the input is made by a combination of physical buttons when the state is off.
Turn off your smartphone completely. Then press the volume down and the power button at the same time. Hold them until you see a picture of a hare in a hat-eared android fixing or a FASTBOOT sign on the screen. If the phone just turned on normally, you've let go of the power button too late or the volume button too early.
⚠️ Warning: If you accidentally switched your phone to Recovery mode (a menu with a black background and several lines), then select Reboot to exit it, then Reboot to Bootloader.
Connect the device to the computer with high-quality USB-It's preferable to use the port. USB 2.0, located directly on the motherboard (back of the system unit), as ports on the front panel or USB-Hubs may give an insufficient voltage or unstable signal.
What if your computer doesn’t see your phone in Fastboot?
Unlocking process with Mi Unlock Tool
After successfully connecting your device in Fastboot mode, the Mi Unlock Tool program must determine the model of your phone. In the utility window, information about the processor, the current version of MIUI and the status of the bootloader will be displayed. Press the Unlock button to initiate the process.
The system will issue a warning that all data will be destroyed. Confirm the action. If you applied less than 7 days (168 hours) ago, the program will report the required waiting time, in which case you will have to wait for the end of the timer, which cannot be reset by standard methods.
When the waiting time is over, repeat the connection procedure and press Unlock again, the process of erasing data and changing the status of the bootloader begins. The phone screen can go out and light up, the device can restart several times, interrupting this process is strictly forbidden.
| Status at Mi Unlock | User action | The result |
|---|---|---|
| Successfully unlocked | Nothing to do | bootloader unlocked, data deleted |
| Unlock failed: Couldn't verify device | Reconnect the cable, reconnect the account | Repeat attempt required |
| Wait 168 hours | Wait for the time specified | Unlocking is not possible before the expiration date |
| Current account is different | Log out and log into the correct account | Requires matching accounts on PC and phone |
After a successful unlock is reported, the phone will automatically restart. The first boot can take up to 10-15 minutes, as the system will reconfigure the file structure. On the welcome screen, you may notice the words "Unlocked" in the corner or when you boot, which confirms the success of the operation.
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Successful unlocking is always accompanied by a complete data reset (Wipe Data), a security measure that prevents attackers from accessing your files when you change access rights.
Removing frequent errors and timeouts
Redmi Note 9 Pro users often experience a variety of errors during the unlock process, one of the most common being the "Couldn't verify device." USB-You can use a different type of driver or a different type of cable, or you can use a different port. USB.
Another common problem is the account authorization error. Xiaomi servers are sometimes overloaded and the utility can not get an answer. IP-Address (e.g., give the Internet from your phone instead of Wi-Fi) also helps to clear the cache of the Mi Unlock application through the menu "Settings" in the program itself.
- 🔄 Try using compatibility mode for Windows 7 or 8 when you start Mi Unlock.
- 🛡️ Disable the antivirus and firewall for the duration of the procedure, they can block the connection.
- 📱 Make sure the phone is on debugging. USB and permission to debug through USB-interface.
If the utility is stuck at 54 percent or 99 percent, don't panic. Often, it means deep cleaning of memory parts. Leave the computer on for 30-40 minutes. If progress hasn't moved, try restarting your phone in Fastboot and re-opening it.
⚠️ Note: Do not attempt to use modified versions of the Mi Unlock Tool unless you are an experienced user. MIUI, Which will lead to the “blocking” of the device.
Consequences of Unblocking and Safety
Once the bootloader is unlocked, the security of your Redmi Note 9 Pro changes. Some features that depend on system integrity stop working, for example, Google Pay (now Google Wallet) may refuse to work, although there are methods of bypassing Magisk. Widevine L1 also stops working, which will cause streaming services (Netflix, Disney+) to broadcast video only in low resolution.
The system becomes more vulnerable to physical access. If the phone falls into the wrong hands when it is turned off, an attacker could theoretically flash custom recaps and access data if it has not been deleted or protected by a complex password.
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Once the bootloader is unlocked, it is recommended to install the root rights manager (like Magisk) immediately if you need one, or leave the system clean.Do not leave the phone with the bootloader unlocked and without root rights for a long time without protection if you store critical data.
However, for most enthusiasts, the benefits outweigh the disadvantages: The ability to install global firmware on the Chinese version, removing ads, deep customizing the interface and extending the life of the device through installing fresh versions of Android are worth it.