Forgotten. PIN-Xiaomi Mi Band 4 code and can't unlock the screen? This problem is familiar to many fitness bracelet owners - passwords are rarely entered, but at the most inopportune moment can "fly out" of memory. Fortunately, the manufacturer has provided several ways to restore access, and experienced users have found workarounds.
Unlike smartphones, where unlocking often requires a hard reset, the Mi Band 4 offers more gentle methods. The main thing is not to panic and not try to guess the code at random: after 5 wrong attempts, the bracelet will lock for 5 minutes. In this article, we will analyze all the current ways of unlocking, from official to little-known life hacks, including working with the Mi Fit application, resetting through ADB, and even physical intervention (if nothing helps).
Importantly, the methods vary in complexity and consequences, like resetting through an app saves data, and hard resets erasing it irrevocably, and we noted the only way that is guaranteed to work 100% even with a fully untied bracelet, but it requires a connection to a PC.
1 Unlocking through the Mi Fit app (official method)
The easiest and safest way to do this is to use Mi Fit’s branded app (or its Zepp Life counterpart for newer versions), which works if the bracelet is tied to your Xiaomi account and synced at least once after you set your password.
Algorithm of action:
✅ Pros: does not require resetting settings, the data on steps and training will be preserved.
❌ Cons: it will not work if the bracelet is untied from the account or the application has not been updated for a long time.
The bracelet is connected to the phone via Bluetooth|
Mi Fit version no older than 2023 |
You have access to your Xiaomi account (email + password) |
The phone has mobile internet (for the SMS-confirmation)-->
2. Reset password via ADB (for advanced users)
If the official method didn’t work, and the bracelet is still synced with the phone, you can try to reset the password over the Android debugging bridge (ADB). This method requires the presence of a PC, USB-cable and enabled debugging by USB smartphone.
Instructions:
- Download and install Platform Tools (includes ADB).
- Connect your phone to your PC, activate Developer Mode (7 times click on “Build Number” in your phone settings) and enable USB Debugging.
- Open the command prompt (cmd) and type in: adb shell am start -n com.xiaomi.hm.health/com.xiaomi.hm.health.view.ResetPasswordActivity
- The phone will display a password reset window on the bracelet. Follow the clues.
⚠️ Note: this method does not work on all versions of Mi Fit. If the command issues an Activity not found error, then your version of the application does not support such a reset.
What if the ADB does not recognize the device?
3 Hard Reset (Hard Reset) through a button
If the bracelet doesn't sync with your phone or you don't remember the data from your Xiaomi account, you just have to reset it to the factory settings, and this method erases all the data: steps, training, alarm settings, even account binding.
How to make a Hard Reset:
- Remove the bracelet from your hand and place it on a flat surface.
- Find a small hole with a reset button (near the charging connector) on the back of the Mi Band 4.
- Take a paper clip or toothpick, press and hold the button for 10-15 seconds until you feel the vibration.
- Release the button and the bracelet will reboot and return to factory settings.
After discharge:
- 🔄 The bracelet will be like a new one – you will need to re-tether through Mi Fit.
- 📱 All data that is not synchronized with the cloud will be lost.
- 🔋 The battery charge must be at least 20%, otherwise the reset may be incorrect.
💡
If the reset button doesn't respond, try plugging the bracelet into charging for 5 minutes, and then repeat the procedure. Sometimes a discharged battery blocks the hardware reset.
4 Unlocking through firmware (flashing)
This method is suitable for users who are willing to take risks for the sake of data preservation: flashing the bracelet through Mi Band 4 Tools or Notify & Fitness allows you to bypass the lock, but requires strict adherence to instructions.
Step-by-step:
- Download Gadgetbridge (alternative to Mi Fit) or Mi Band 4 Tools.
- Connect the bracelet to the PC via Bluetooth adapter (better use Bluetooth 4.0+).
- In the utility, select “Install Firmware” and download the latest firmware version for Mi Band 4 (e.g., 1.0.9.54).
- Wait until the process is complete (the bracelet will reboot several times).
⚠️ Warning: Wrong firmware can turn the bracelet into a brick. Use only files designed for your model (Mi Band) 4, Not the Mi Band. 5/6).
| Unlocking method | Are the data stored? | You need a PC? | Difficulty |
|---|---|---|---|
| Through Mi Fit. | ✅ Yes. | ❌ No. | ⭐⭐ (easily) |
| ADB-team | ✅ Yes. | ✅ Yes. | ⭐⭐⭐ (middle-of-the-road) |
| Hard discharge | ❌ No. | ❌ No. | ⭐ (easily) |
| Flip-flashing | ⚠️ Partially. | ✅ Yes. | ⭐⭐⭐⭐ (difficult) |
5. Alternative methods (if nothing helps)
If the standard methods didn’t work, try these non-obvious solutions:
- 🔌 Connecting to another phone: Installing Mi Fit on a second smartphone sometimes allows you to bypass the lock by linking to a new account.
- 🕒 Waiting for discharge: if the bracelet discharges to 0% and turns off, the next time it is turned on, it can request the binding again (data will be saved if the battery does not completely run down).
- 📦 Contact the service: official service centers Xiaomi can unlock the bracelet by serial number (service paid, ~500–1000 ₽).
💡 Lifehack: If the bracelet is locked after a firmware update, try rolling back to the previous version via Gadgetbridge:
- Download the archive with firmware (e.g. 1.0.8.48).
- Select "Downgrade Firmware" from the utility.
- Confirm the rollback - after the reboot, the password may be reset.
Through Mi Fit.|Hard discharge|ADB-team|Flip-flashing|Nothing helps.-->
6.How to avoid blocking in the future
To avoid the problem again, follow these tips:
- 🔐 Use the memorable PIN: Instead of random numbers (such as 1234 or date of birth), select the combination associated with the bracelet (for example, 2019 is the year of release of the Mi Band 4).
- 📲 Regularly sync data: settings Mi Fit → «Synchronization» → «Autosynchronization (enable the option).
- 📝 Save Backup: Mi Fit has a feature to export data to Google Fit or Apple Health.
⚠️ Warning: If you often forget passwords, turn off the screen lock altogether. → Lock screen → No, minus, anyone can look at your notifications.
💡
The only way to unlock Mi Band 4 without losing data is to use the official Mi Fit or ADB app. All other methods lead to a reset.