Connecting Xiaomi Mi Band 4 to Samsung phone: full instruction with error solutions

The Xiaomi Mi Band 4 fitness bracelet remains one of the most popular gadgets for tracking activity, despite the release of new models. Its combination with Samsung phones is a common pair, but users often face the nuances of synchronization due to the differences in the ecosystems of MIUI and One UI. In this article, we will analyze not only the basic connection, but also hidden settings that will help avoid typical errors, from Bluetooth problems to application conflicts.

The Mi Band 4 is a feature that requires the official Mi Fitness app (formerly Zepp Life), which doesn't always work properly on Samsung because of the manufacturer's optimizations. We tested the process on devices from the Galaxy S20 to the Galaxy A14 (2026) and identified key points: from choosing the right version of the software to manually adjusting permissions, if you previously tried to connect the bracelet and got an error "failed to find the device" or "Sync is interrupted" - here you will find solutions.

Important: The instruction is relevant for bracelets with firmware 1.0.9.54 and later, as well as for Android phones 10-14. If your Samsung runs on an older version of the OS, some steps may differ - we will warn about this separately.

1.Preparing Samsung phone for connection

Before synchronization, you need to configure the smartphone itself to avoid conflicts with the Mi Band 4.

• 🔄 Energy saving mode that blocks background work of Mi Fitness.
• 📱 Application permissions that are one UI resets after updates.
• 🔗 Conflicts with other fitness apps (such as Samsung Health or Google Fit).

Check out the Android and One UI version first:

1. Open the settings → information about the phone.
2. Remember the values of the Android version and the One UI version.

If your phone is running Android 9 or older, upgrade it via Settings → Software Update. Mi Band 4 officially supports Android 5.0+, but in practice, stable work starts with Android 8.0.

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On Samsung phones with Android 12+, turn on Developer Mode and turn off the Restrict Background Activity setting for Mi Fitness. This will prevent connection breaks with the bracelet.

Also remove or disable other fitness apps that may conflict with Mi Fitness:

• Samsung Health (can block sensor access)
• Google Fit (sometimes interferes with step syncing)
• Huawei Health (if you have previously used devices of this brand)

Galaxy Watch

Mi Band 4

2. Installation and configuration of the Mi Fitness application

The official Mi Band 4 app is Mi Fitness (formerly Mi Fit and Zepp Life).

• 🌐 From Google Play (recommended).
• 📱 From the Galaxy Store (if Google Play is not available).
• 📎 From the official Xiaomi website (only for regions where the application is blocked).

After installation, follow the following steps:

1. Start Mi Fitness and sign up with Xiaomi Account (or sign in if you already have an account).
2. Select the region of Russia (or your country) – this affects the available features.
3. In the app menu, tap Profile → Add Device → Bracelet → Mi Smart Band 4.

Allow access to geodata | Enable notifications | Allow autorun | Turn off battery optimization for the application-->

On Samsung phones, after installing the application, you need to manually configure permissions:

1. Go to Settings → Applications → Mi Fitness → Permissions.
2. Turn it on: 📍 Location (required to search for a bracelet) 📱 Notifications (to display alerts on the bracelet) 🔋 Auto-run (to make the application work in the background)

Optimizing the battery

Mi Fitness

3. Step-by-step connection of Mi Band 4 to Samsung

Now, let's move directly to synchronization.

• 🔋 Bracelet charged at least 50 times%.
• 📶 Bluetooth and Wi-Fi are enabled on the phone (to download firmware).
• 📱 Mi Fitness is open and is on the device add screen.

Instructions for connection:

1. On the Mi Band 4 bracelet, tap the touch button to wake up the screen.
2. Scroll down to the point Connect (on the bracelet will appear) QR-code).
3. In the Mi Fitness app, click Scan QR-code and point the camera at the bracelet screen.
4. Confirm the pairing on the phone (the request “Allow access to contacts and notifications?” will appear).
5. Wait for the synchronization to be completed (the bracelet vibrates and will show the tick).

If QR-code is not readable:

• 🔦 Increase the brightness of the bracelet screen to the maximum.
• 📸 Try manually entering a 6-digit code that appears under QR.
• 🔄 Reset the bracelet (press the touch button for 10 seconds).

4. Set up notifications and basic functions

After successful connection, we will configure the key functions:

🔔 Notifications from the phone

To alerts from messengers and calls displayed on the bracelet:

1. In Mi Fitness, select Mi Smart Band 4 → Application Notifications.
2. Turn on the Notification switch.
3. Tap Notification Management and select apps (such as WhatsApp, Telegram, VKontakte).

On Samsung, additionally:

1. Go to Settings → Notifications → Additional → Notifications on the locked screen.
2. Enable the option to Show notification content for Mi Fitness.

⚡ Energy conservation and background work

To keep the bracelet from turning off:

• In Settings → Device Care → Battery → Background work add Mi Fitness to the Never Limit list.
• Turn off the Adaptive Battery for this application.

🏃 Activity tracking functions

In the Mi Smart Band 4 → Heart Monitoring section, set up:

• 🩺 Continuous heart rate monitoring (discharges the battery faster, but more accurately).
• 😴 Sleep tracking (turn on deep sleep and sleep) REM-phase).
• 🏊 Swimming recognition (if you are in the pool).

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On Samsung with One UI 5.0+, notifications can be duplicated if Samsung Health also has step sync enabled. Turn it off in Samsung Health Settings → Data Accounting → Steps.

5. Solving typical connection problems

Even after setting up correctly, Samsung users are faced with errors.

If the bracelet is connected but the data is not synchronized:

⚠️ Note: On Samsung phones with Android 13+ You may be blocking your calendar. → Confidentiality → Permits → Calendar and provide access to Mi Fitness.

For resetting the bracelet to factory settings:

1. On the bracelet, go to Settings → Additional → Reset.
2. Confirm the action (the bracelet vibrates and reboots).
3. Repeat the connection procedure again.

6. Optimize the Mi Band 4 with Samsung

To ensure that the bracelet works stably and economically consumes the charge:

🔋 Extension of battery life

• Turn off the raising of your hand to wake up (saves up to 20% charge).
• Set the heart rate interval every 30 minutes instead of continuously.
• Turn off vibrations for unnecessary notifications (e.g., mail).

📲 Synchronization with Google Fit

If you use Google Fit, connect it to Mi Fitness:

1. In Mi Fitness, go to Profile → Settings → Accounts → Google Fit.
2. Log in and allow access to the data.

🎨 Setting up dials

Set alternative dials through:

• 🌐 Official store in Mi Fitness (dials section).
• 📱 Third-party apps like Amazfit Watchfaces (requires manual installation via.bin file).

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To speed up sync, turn off Traffic Savings in Samsung Settings → Connections → Using Data for Mi Fitness.

7. Alternative ways of connecting (if the standard one does not work)

If the bracelet is persistently not connected via Mi Fitness, try alternative methods:

🔄 Connection with Notify & Fitness

Notify & Fitness for Mi Band (available on Google Play) supports Mi Band 4 and is often more stable than the official app.

1. Install and open Notify & Fitness.
2. Select Mi Band 4 from the list of devices.
3. Follow the pairing instructions (similar to Mi Fitness).

🖥️ Manual firmware update

If the bracelet is glitching due to outdated software:

1. Download the latest firmware for Mi Band 4 from amazfitwatchfaces.com.
2. Place the.fw file in the Mi Fitness folder on your phone.
3. In the app, go to Profile → Mi Smart Band 4 → Update firmware.

⚠️ Warning: Don't interrupt the firmware update process! If the bracelet shows progress bar, don't turn off Bluetooth or close Mi Fitness.

8. Frequent Questions and Answers (FAQ)