Mi Band 4 emerges as a worthwhile tech purchase in the current era, having been on the market for just over 3 months. However, it currently faces the challenge of lacking Vietnamese language support (including both domestic and international versions). But fear not, as recently, the MIUI community has crafted a Vietnamese Firmware for Miband 4 based on refined Polish language.

What Distinguishes the New Firmware from the Old Firmware?
This new Firmware utilizes 100% English-Vietnamese integration. All notifications displayed on the Mi Band 4 are entirely in flawless Vietnamese without font errors. Meanwhile, elements like Home, heart rate monitoring, remain in English similar to the default international version.
The previous Firmware we used had a Russian-Vietnamese interface. While notifications on the Mi Band 4 displayed in Vietnamese, the interface for functions like Home, heart rate monitoring, and sports was in Russian. It posed significant usability challenges.
Maintaining the usage of both Russian-Vietnamese and English-Vietnamese interfaces, undoubtedly, the English-Vietnamese option will be more convenient, ensuring 100% usability.
The latest standard Vietnamese Firmware version:
DOWNLOAD HERE:
file-firmware-vietnamese-language-miband-4.rar
2. For Android Users
For Android users, you need to download the Firmware file to your device and install the Notify & Fitness for Mi Band app via the following link: https://play.google.com/store/apps/details?id=com.mc.miband1&hl=en
Step 1: Download the software and launch it to begin using.


Step 3: Open the downloaded Firmware file. The system will verify its validity. Finally, click Start update to finish.

Step 4: After the update, go back to the Tools tab and switch the Mi Band 4 language to Polish to display Vietnamese.

Congratulations! You have successfully switched to Vietnamese 100%.

On IOS Platform
For IOS users, download the Amaztools software to your device before downloading the Firmware.
Download Link: https://apps.apple.com/us/app/amaztools/id1386033880
Step 1: Launch the application and connect it to your Mi Band 4.

Step 2: Proceed to Download Firmware File to your device.
Note: Open the link in Safari browser.
Firmware File Link
Step 3: After downloading the File, Safari will suggest Opening in Amaztools. Click here.

Step 4: Amaztools will immediately launch alongside the Firmware file. Select Install to proceed with installation. The installation process will take about 1-2 minutes.

Step 5: After installation, return to Amaztools and go to the More tab. Change Watch Language to Polos (Polish) to complete the process.

And here is our result.

So, the software trick has guided you on how to change the language to Vietnamese on Miband 4 effectively with the latest bilingual English - Vietnamese now. Wish you success!