Xiaomi’s Mi Smart Band 4C fitness bracelet remains one of the most popular activity tracking gadgets due to its combination of affordable price and wide functionality. However, many users face difficulties when connecting a device to a smartphone for the first time — especially if both devices are from the same brand. In this article, we will discuss not only the standard synchronization procedure, but also the nuances that arise when working with the Xiaomi ecosystem, including problems with Mi Account, setting up notifications and optimizing power consumption.
It's important to understand that the Mi Smart Band 4C is a simplified version of the Mi Band 4 lineup, and some features (such as NFC or color display) are missing. However, the basic features - pedometer, sleep monitoring, notifications and heart rate control - work steadily. The main thing is to properly configure the connection between the bracelet and phone. If you have already tried to connect but encountered errors like "Cannot find the device" or "Sync error", do not rush to reset: 90% of the problem is solved by settings of the smartphone or firmware update.
Preparation for connection: what to check before starting
Before you start syncing, make sure your smartphone and bracelet meet the minimum requirements. - Mi Smart Band 4C Compatible with Android 5.0 devices+ or iOS 10.0+, But for full work with the ecosystem Xiaomi is recommended to use a phone with a MIUI 10 and higher. This is due to the optimization of Bluetooth Low Energy protocols (BLE), which are responsible for a stable connection.
Also check:
- 🔋 Bracelet charge: Battery level should be at least 20%.In low charge, the connection process may be interrupted.
- 📱 Mi Fitness: Older version may not support Mi Smart Band 4C. Update it via Google Play or App Gallery.
⚠️ Note: If you are using a Xiaomi smartphone with MIUI 12.5+, Turn on the developer mode and activate the option “Bluetoothbusting” in Settings → The phone. → Version. MIUI (Press 7 times.This will help avoid connection problems on newer versions of the shell.
How to connect Mi Smart Band 4C to Xiaomi phone
The connection process takes no more than 5 minutes, if you follow a clear algorithm, and below is a universal instruction that is relevant for all Xiaomi smartphone models (including Redmi, POCO and Mi).
- Install the Mi Fitness app: Download it from the official store: 🤖 Google Play for Android) 🍎 App Store (for iOS)
Note: On Xiaomi smartphones with MIUI, the app can be pre-installed as “Health” or “Mi Health.”
Mi Account
Without a Xiaomi account, you can’t sync your data. If you don’t have an account, create it directly in the Mi Fitness app or through account.xiaomi.com.
Bluetooth
geolocation
Go to Settings → Bluetooth and activate the module. Geolocation is required for the pedometer and GPS (if supported).
Add the bracelet in the app
Open Mi Fitness, click Profile → Add Device → Bracelet → Mi Smart Band 4C. Follow the instructions on the screen.
Confirm the connection on the bracelet
The Mi Smart Band 4C screen will show a confirmation code, compare it to what is displayed in the app, and click the tick on the bracelet.
Charge the bracelet to 50%+
Update Mi Fitness to the latest version
Enable Bluetooth and geolocation
Registering for Mi Account
Provide all permissions to the application-->
Critical detail: If the bracelet was previously tied to another phone, reset to factory settings. To do this, press the touch button on the Mi Smart Band 4C for 10 seconds until the vibration and the Mi logo appear.
Solving common connection errors
Even with the correct following of the instructions, there can be failures, and below is a list of the most common problems and ways to fix them.
| Mistake. | Possible cause | Decision |
|---|---|---|
| Couldn't find the device. | Bluetooth is disabled or the bracelet is discharged | Check the bracelet charge, reboot Bluetooth on your phone |
| Data synchronization error | Outdated firmware bracelet or application | Update Mi Fitness and bracelet firmware through Profile → Software Update |
| The bracelet is connected but does not show notifications | Notification permissions for Mi Fitness are not given | Go to Settings → Applications → Mi Fitness → Notifications and turn on all switches |
| The application freezes at the connection stage | Conflict with other Bluetooth devices | Turn off other gadgets (earphones, speakers) and try again |
⚠️ Warning: If the bracelet is permanently turned off after connecting, check Xiaomi's power saving settings. → Battery → Power saving mode add Mi Fitness to exceptions. Also disable the Bluetooth Background Optimization feature in the developer settings.
What to do if the bracelet is not defined at all?
Set up notifications and personalize the bracelet
Once you've successfully connected, you can configure notifications, dials, and other settings.
- Select your dial: In Mi Fitness, go to Profile → Mi Smart Band 4C → Dials. There are over 50 free dials available. Use apps like Amazfit Watchfaces to download third-party dials (requires manual installation via.bin files).
- Configure notifications: Activate Call and Message Notifications in your bracelet settings. For select applications (such as WhatsApp or Telegram), manually enable them in your Notification Settings.
- Activity control: Turn on foot, sleep and pulse tracking in the Monitoring section. For pedometer accuracy, calibrate the bracelet: walk 20 steps with your phone in your hand, and save the data to Mi Fitness.
💡
If notifications are late, turn off the Adaptive Battery feature in your Android settings.It limits the background activity of apps, including Mi Fitness.
For Xiaomi users, additional integration with the Mi Home ecosystem is available. For example, the bracelet can be used to control Yeelight smart lamps or Mi Smart Plug sockets through gestures (shaking the hand).
- Install the Mi Home app.
- Connect smart devices to one Mi Account account.
- In Mi Fitness, activate the Smart Home option in the bracelet settings.
Also pay attention to the temperature regime: when using the bracelet in the cold below -10 ° C or in the sauna (+60 ° C), the battery discharges faster due to changes in the chemical properties of the lithium polymer battery.
💡
For maximum autonomy, turn off vibrations at notifications and reduce the brightness of the screen to 50%. This will extend the bracelet for 2-3 days.
Resetting settings and reconnecting the bracelet
If the Mi Smart Band 4C is not running smoothly (it doesn’t sync data, doesn’t show time, or is permanently off), you may need to reset to factory settings.
For discharge:
- Open Mi Fitness and untie the bracelet to Profile → Mi Smart Band 4C → Disable the device.
- On the bracelet itself, press the touch button for 10-15 seconds until you feel the vibration and see the Mi logo.
- Reconnect the bracelet as you did when you first used it.
⚠️ Note: After reset, all data (steps, sleep, exercise) will be deleted from the bracelet, but it will be stored in the Mi Account cloud if synchronization is enabled.
If the reset didn't help, check:
- 🔄 Bracelet firmware: Outdated software can cause malfunctions. Update it with Mi Fitness.
- 📲 Conflicts with other apps: Remove cloners like Notify & Fitness or Tools & Mi Band – they can block official software.
- 🔌 Physical condition of the bracelet: Check the charging contacts for oxidation or contamination.
Compatible with other Xiaomi devices
The Mi Smart Band 4C integrates well not only with smartphones, but also with other Xiaomi appliances.
- 🎧 Mi True Wireless Earbuds: When connected to one Mi Account, the bracelet can control the playback of music (pause / play) by gesture.
- 🚴 Mi Cycling: Training data automatically synced to Mi Fitness.
To make the ecosystem work, all devices must be linked to one Mi Account, and if you use multiple accounts (for example, personal and work), data will not sync between devices.