Why is the Mi Band 4 and Samsung A50 the perfect duo?
The Xiaomi Mi Band 4 fitness bracelet remains one of the most popular gadgets for monitoring activity even years after its release. Its combination with the Samsung Galaxy A50 is a classic example of how devices from different ecosystems can perfectly complement each other. But many users face difficulties in the first synchronization: the application does not see the bracelet, the connection is constantly broken, or the data is not updated. In this article, we will analyze all the stages of connection – from preparing the phone to fine-tuning notifications, and also reveal the unique nuances of interaction of the Mi Band 4 with Android 11/12 on the Samsung A50.
It’s important to understand that the Mi Band 4 only officially supports the Mi Fit app (or its updated version of Zepp Life), but not all features work equally well on Samsung devices. For example, because of the power-saving features of the Galaxy A50, the bracelet can lose communication in the background.
Preparing the phone: what to do before connecting
Before you start syncing, make sure your Samsung Galaxy A50 is ready to work with the Mi Band 4.
- 📱 Update your phone firmware: Go to Settings → Update the software and install the latest patches. At the time of 2026, the current version of Android for the future A50 — 12 (One UI 4.1).
- 🔄 Reset your network settings (if you’ve had Bluetooth issues before): → General management → Reset → Resetting network settings.
- 🛡️ Turn off battery optimization for the Mi Fit app: this will prevent connection breaks.Path:Settings → Caring for the device → Battery → Battery settings → Applications in the background.
- 📲 Remove old versions of apps: If you’ve previously installed Mi Fit or Zepp, remove them and download the latest version from Google Play.
Pay special attention to Bluetooth resolutions, the Samsung A50 sometimes works with protection against connection to "unknown" devices, to avoid blocking:
- Go to Settings → Connections → Bluetooth.
- Click on the three dots in the upper right corner and select Additional Settings.
- Activate the Device Visibility option and turn off Automatic Bluetooth Shutdown.
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If you have an antivirus installed (such as McAfee or Avast), temporarily disable it. These programs often block the exchange of data between the wristband and the phone.
Installation and configuration of the Mi Fit/Zepp Life application
The official Mi Band 4 app, Mi Fit, is being gradually replaced by Zepp Life (formerly Amazfit).Both options are suitable for synchronization, but Zepp Life offers a more modern interface and better compatibility with Android 12.
- 🔗 Mi Fit in Google Play
- 🔗 Zepp Life on Google Play
After installation:
- Launch the app and register (you can use Google, Facebook or phone number).
- Select the region of Russia (or your country) – this is important for the correct operation of notifications.
- In the main menu, click Add Device and select Mi Smart Band 4.
- Follow the instructions on the screen until you reach the Bluetooth connection stage.
At this point, many users are faced with the error "Can't find the device."
| Problem. | Reason. | Decision |
|---|---|---|
| The bracelet is not displayed in the list | Bluetooth is disabled or the bracelet is discharged | Charge Mi Band 4 to 50%+ and reboot Bluetooth on your phone |
| He's constantly asking. PIN-code | Old cache data interferes with connection | Clear the Bluetooth cache in Settings → Apps → Bluetooth → Storage → Clear the cache |
| The application freezes at the "Connection" stage | Conflict with other gadgets (for example, headphones) | Turn off all other Bluetooth devices and try again. |
| Error "Device not supported" | An outdated version of the application or firmware bracelet | Update Mi Fit/Zepp Life and Mi Band 4 firmware through the app |
Bracelet charge > 30%|Bluetooth on your phone is on|All other Bluetooth devices are disabled|Application Mi Fit/Zepp Life updated|Notification and location permits issued-->
Step-by-step instructions for connecting Mi Band 4 to Samsung A50
Now, to the synchronization process itself, follow the instructions carefully, and skipping even one step can cause a failure.
- Activate the bracelet: tap the touch button of Mi Band 4 to wake up the screen. QR-code or inscription Pair (Pair).
- Run an in-app search: in Mi Fit or Zepp Life, click Add Device → Mi Smart Band 4. Scanning will begin.
- Confirm the connection: when the bracelet appears on the list, tap it. On the screen of the Mi Band 4, a vibration will appear and a request for confirmation will appear - tap the button of the bracelet.
- Update the firmware (if it offers it): it will take 5-10 minutes. Do not interrupt the process - the bracelet may stop responding to charging.
- Set the basic parameters: choose your hand (left/right), specify height, weight and goal by step.
After successful connection, check:
- ✅ The bracelet appears in the list of Bluetooth connected devices.
- ✅ Steps and pulse data updated in real time.
- ✅ Vibration is triggered by test notification.
What if the bracelet is connected but does not sync the data?
Configure notifications and additional functions
By default, Mi Band 4 shows notifications only from calls and SMS to expand the functionality of the service.
- Open Mi Fit/Zepp Life and go to Profile → Mi Smart Band 4 → Notifications.
- Activate the Application Notification switch.
- Select the apps you want to see on your bracelet (for example, WhatsApp, Telegram, Gmail).
- Configure the Notification Style: You can turn on the display of the text of the messages or only the app icon.
There's a nuance on the Samsung A50: due to Android 12's privacy policy, some notifications may not arrive.
- Go to Settings → Notifications → Additional settings.
- Find Mi Fit or Zepp Life in the list and allow you to display notifications and important notifications.
- For stable operation, disable Adaptive Notifications in your Google account settings.
Additional functions that are worth configuring:
- 🔋 Battery Control: Activate Low Charge in bracelet settings to receive alerts at charge level below 20%.
- 💤 Sleep monitoring: Turn on Sleep Autodetermination for more accurate data.
- 🏃 Exercise: Add frequently used activities (running, cycling, swimming) to Quick Access.
- 🔒 Screen lock: set up to unlock your phone through the bracelet in Settings → Security → Unlocking the Mi Band.
Solving common connection problems
Even after successful synchronization, Samsung A50 users may encounter errors, and consider the most common ones and how to fix them.
1.The bracelet plugs in but shuts off quickly
The reason: Android 12 aggressively optimizes background processes.
⚠️ Attention: On Samsung A50 one UI 4.1 You must manually add Mi Fit to the list of Non-Optimized Applications:
- Go to Settings → Care for the device → Battery.
- Slip on three dots in the top corner and select Battery Settings.
- Find Mi Fit, open its settings and turn off Battery Optimization.
2. no notifications from messengers are received
The problem is often with notification access settings.
- Mi Fit allows notifications for the desired applications.
- Android settings for these apps include notification displays (e.g. for WhatsApp: Settings → Notifications → WhatsApp → Enable).
- Do not disturb or focus mode on the phone is turned off.
3.The bracelet does not synchronize steps or sleep data
Possible causes and solutions:
| Symptoms. | Probable cause | How to fix it |
|---|---|---|
| Steps not updated | Bracelet uncalibrated | Walk 30 steps with your phone in your hand for automatic calibration |
| Sleep data is missing. | Synchronization failure | Reboot the bracelet and force the data to sync in the app |
| Pulse is not measured. | Wrong position of the bracelet | Tighten the strap tighter (by 2-3 cm above the wrist) |
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If after all the manipulations, the bracelet still does not work stably, try resetting it to the factory settings: Bracelet settings → Additional → Reset. After that, repeat the connection process again.
How to extend the life of the Mi Band 4 battery when using Samsung A50
The Mi Band 4 is famous for its energy efficiency, but when used with the Samsung A50, the charge can go down faster.
- 🔋 Turn off constant pulse monitoring: go to Profile → Mi Smart Band 4 → Monitor your heart rate and choose manual instead of auto.
- 📴 Reduce notification frequency: Leave only critical applications (calls, SMS, 1-2 messengers).
- 🌙 Use dark dials: AMOLED-The screen uses less energy on a black background. Set theme from the screen section. → Dials.
- 🔄 Manually sync data: disable Autosynchronization and update statistics 2-3 times a day.
The average lifetime of the Mi Band 4 at optimal settings is 10–14 days. If the battery goes down in 3–5 days, check:
- Is the theater mode (constantly burning screen) turned on?
- Are there background trainings (for example, walking or cycling) running?
- Is the battery damaged (swelling, overheating during charging).
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To quickly check the battery status of the bracelet, go to Profile → Mi Smart Band 4 → Device status. This shows the wear level of the battery and the temperature of the device.