Xiaomi Mi Smart Band 4 Firmware Update and Version Check

Firmware is the internal software that runs on Xiaomi Mi Smart Band 4. Updating it through the Mi Fit app on Android can fix bugs, improve stability, add language support and sometimes unlock new features or refine existing ones. Keeping the firmware reasonably up to date ensures the band works smoothly with your phone and tracks health data more reliably.

This guide explains how firmware updates work, how to check your current version, how to safely perform an update using an Android phone, and what to do when something goes wrong.

  1. How Firmware Updates Work on Xiaomi Mi Smart Band 4

When you update Xiaomi Mi Smart Band 4, three main components are involved:

  • The band
    Stores and runs the firmware. During an update it temporarily switches into an update mode and shows a progress indicator.

  • The Mi Fit app on Android
    Downloads the latest compatible firmware package from Xiaomi’s servers. Then it sends the update to the band via Bluetooth.

  • Your Mi account
    Links the band to your user profile and may control which regional firmware branch you receive (for example, global vs specific region builds).

The update process always goes through the Mi Fit app. You do not manually download files or connect the band to a computer.

  1. Preparing for a Safe Firmware Update

Before starting any firmware update on Xiaomi Mi Smart Band 4, set up the basics:

  • Charge the band

    • Make sure the battery level is comfortably above low level (ideally more than 30–40%).

    • Avoid starting an update when the battery is almost empty; if it powers off mid-update, issues can occur.

  • Charge or plug in the Android phone

    • Keep enough battery on the phone (or connect it to a charger) so it does not turn off during the update.

  • Stable Bluetooth connection

    • Turn Bluetooth on in Android settings.

    • Keep the band close to the phone (a few centimeters apart).

    • Avoid placing them in separate rooms or in bags while updating.

  • Stable internet connection

    • Wi-Fi or reliable mobile data is needed so Mi Fit can download the firmware package before sending it to the band.

Once these four points are in place, the risk of update failures is much lower.

  1. Checking Firmware Version from the Band

You can view the current firmware version directly on Xiaomi Mi Smart Band 4:

  1. Wake the band’s display.

  2. Swipe to find the Settings or More menu (depending on firmware).

  3. Enter Settings.

  4. Look for an option such as About, Regulatory or similar.

  5. On that screen, you will find information like:

    • Device model

    • Firmware version

    • Other basic device info

Version numbers are usually a combination of digits and dots (for example, something like 1.x.x). They do not need to be memorized; they are mainly useful if you are checking whether an update has successfully applied.

  1. Checking Firmware Version from Mi Fit on Android

You can also check the firmware version using the Mi Fit app:

  1. Open Mi Fit on the Android phone.

  2. Tap the Profile tab.

  3. Under “My devices”, select Xiaomi Mi Smart Band 4.

  4. On the band’s device screen, scroll down to find an entry like Firmware version or Device info.

The value you see here should match what appears on the band’s own About screen. This is handy if you are troubleshooting and want to cross-check.

  1. Checking for Firmware Updates in Mi Fit

Mi Fit automatically checks for updates when the band connects, but you can also manually trigger a check:

  1. Open Mi Fit on your Android phone.

  2. Go to the Profile tab.

  3. Select Xiaomi Mi Smart Band 4.

  4. Stay on this page with Bluetooth on and the band nearby.

If a new firmware version is available and supported for your region and device:

  • A prompt or alert will appear indicating that an update is available.

  • Alternatively, an “Update” button may appear near the firmware information.

If no notification appears, your band is likely already up to date with the latest version offered for that configuration.

  1. Performing a Firmware Update Step by Step

When Mi Fit indicates that a new firmware is available, the update process typically looks like this:

  1. Start the update

    • Tap the Update button or confirm the prompt in Mi Fit.

    • Ensure both phone and band remain close together.

  2. Download to the phone

    • Mi Fit first downloads the firmware package to the Android device over the internet.

    • Do not close the app or disable the network during this stage.

  3. Transfer to the band

    • Once downloaded, Mi Fit begins sending the firmware to Xiaomi Mi Smart Band 4 via Bluetooth.

    • The band usually displays an update progress bar or icon.

    • Do not press any buttons on the band that might reset it, and do not walk out of Bluetooth range.

  4. Automatic restart

    • After reaching 100%, the band may restart automatically.

    • Mi Fit will then reconnect and finish any final sync steps.

  5. Confirmation

    • When the process finishes, Mi Fit typically shows a success message.

    • You can check the firmware version again on the band or in the app to confirm that it changed.

During the update, avoid calls that might switch Bluetooth audio, disabling Bluetooth, or force-closing Mi Fit. If something interrupts the process, see the troubleshooting section.

  1. What Firmware Updates Usually Change

Firmware updates can make subtle or obvious differences in how Xiaomi Mi Smart Band 4 behaves. Typical improvements include:

  • Bug fixes

    • Resolving issues like random disconnects, incorrect step counts, or syncing glitches.

  • Performance and stability

    • Smoother menu navigation and fewer freezes or restarts.

  • Feature refinements

    • Better heart rate algorithms.

    • Adjusted vibration patterns.

    • More reliable notification handling.

  • Language and region support

    • Adding new languages for the interface.

    • Improving fonts and character display.

  • Compatibility updates

    • Refining how the band talks to newer Android versions or updated Mi Fit releases.

If you noticed a particular issue before (for example, inaccurate sleep logging or unstable connection), updating to a newer firmware might improve or resolve it.

  1. Firmware and Mi Fit App Version: Why Both Matter

The firmware on Xiaomi Mi Smart Band 4 and the Mi Fit app on Android work as a pair. Problems are more likely when one is very old and the other is fairly new.

To keep everything aligned:

  • Keep Mi Fit updated

    • Use your Android app store to check for updates regularly.

    • New app versions often include better support for existing devices and new firmware packages.

  • Update the band when prompted

    • When Mi Fit offers a new firmware and you are in a safe environment (enough battery, stable network), updating usually helps long-term stability.

Ignoring updates for a long time can lead to small incompatibilities, especially when the Android system itself receives major upgrades.

  1. Region, Model Variants and Firmware Differences

Xiaomi Mi Smart Band 4 has variants (for example, with or without NFC in some markets). Firmware versions for each variant can differ, and sometimes regional restrictions apply.

Important notes:

  • The firmware delivered through Mi Fit is automatically matched to your band’s model and region.

  • You do not choose or install another variant’s firmware manually from within the app.

  • If you change Android phones but use the same Mi account and band, Mi Fit on the new phone will still offer the appropriate updates based on the band model.

Because of these differences, two people in different countries may see slightly different firmware version numbers even if they both have Xiaomi Mi Smart Band 4.

  1. Troubleshooting Failed or Interrupted Firmware Updates

Sometimes updates do not go perfectly. Common issues and solutions include:

Update stuck or progress not moving:

  • Keep the phone and band close together (a few centimeters).

  • Stop moving around too much to avoid Bluetooth interference.

  • Wait a little longer; large updates can take several minutes.

  • If it remains stuck for a long time, cancel (if possible), restart the phone and the band, then try again.

Band shows an error after an update attempt:

  • Restart the band using the Restart option in its Settings (if available).

  • Make sure Mi Fit is up to date on the Android phone.

  • Reconnect the band in Mi Fit and check if it automatically retries the update.

  • If the band is responsive and usable, you can try checking for updates again and repeating the process.

Band not connecting to Mi Fit after a failed update:

  • Turn Bluetooth off and on again on the Android phone.

  • Force close Mi Fit and reopen it.

  • If that fails, restart the phone.

  • As a last resort, you may unpair and then re-pair the band through Mi Fit, though this should be done carefully to avoid losing unsynced data.

In rare cases of severe failure where the band is frozen or does not start normally, leave it on charge for some time and attempt to reconnect. If it remains unresponsive, service assistance may be required.

  1. Checking Firmware Version After Updating

After an update completes, it is good practice to confirm the new version:

On the band:

  • Go to Settings > About (or the equivalent info screen).

  • Note the firmware version displayed.

On the Android phone:

  • Open Mi Fit and go to Profile > Xiaomi Mi Smart Band 4.

  • Scroll to find the firmware or device version information.

Both places should show the same version. If they do, the update has applied successfully. If they do not match or the app still prompts you to update again, restart both devices and sync once more.

  1. When to Update and When to Wait

In general, staying updated is wise, but timing matters:

Update as soon as is convenient when:

  • Mi Fit indicates a stable release and you are not in a rush.

  • You are home, with access to a charger and Wi-Fi.

  • You have encountered bugs that the update claims to fix.

Consider waiting a bit if:

  • You are about to travel or have an important event and absolutely need the band to be stable right now.

  • Your current firmware and app combination work perfectly and you prefer to update later when you have more time.

If you do decide to delay, avoid delaying forever; security, comfort and connectivity often improve with newer firmware.

  1. Reset vs Firmware Update

Resetting Xiaomi Mi Smart Band 4 and updating its firmware are two different things:

  • Firmware update

    • Replaces or upgrades the internal software.

    • Keeps your pairing and account binding intact.

    • Keeps historical data already synced to Mi Fit.

  • Factory reset

    • Clears local settings and data on the band.

    • Disconnects it from the current phone, requiring a new pairing.

    • Does not erase historical data already stored in your Mi account and the Mi Fit app, but does remove everything stored locally on the band.

Perform a firmware update when you want improvements and fixes. Consider a reset only if you plan to give the band to someone else, pair it with a different user, or if you are resolving serious configuration problems.

  1. Best Practices for Long-Term Firmware Management

To keep Xiaomi Mi Smart Band 4 running smoothly over the long term:

  • Use Mi Fit on Android as the primary management hub.

  • Keep Bluetooth on and sync the band regularly so firmware prompts and fixes reach you.

  • Accept firmware updates in a controlled environment with good battery and stable network.

  • After each update, glance through important settings (notifications, workout modes, language, units) to ensure nothing changed unexpectedly.

  • Maintain your Mi account access securely so you can always re-pair or recover your band settings on a new Android device if needed.

By following these steps, firmware updates become a routine part of using Xiaomi Mi Smart Band 4, quietly bringing improvements and reliability while you focus on tracking health, workouts and everyday notifications.

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