Connecting Xiaomi Mi Band 4 to the Redmi smartphone: full instruction with error solutions

The Xiaomi Mi Band 4 fitness bracelet remains one of the most popular activity-tracking gadgets, despite the release of new models. Its combination with the Xiaomi Redmi phone (any series) provides full functionality: notifications, sleep monitoring, heart rate control, and even music control. However, many users face difficulties when connecting for the first time — the bracelet is not on the list of devices, the application emits errors, or synchronization is interrupted.

In this article, we will analyze the step-by-step connection process taking into account the features of the Xiaomi ecosystem, consider common errors and their solutions, and give recommendations for optimizing the operation of the bracelet. MIUI 12/13/14 — From Bluetooth settings to Mi Fitness application background activity resolution.

1.Preparation for connection: what to check before starting

Before you start syncing, make sure that the basic conditions are met, and neglecting them is the cause of 70% of the connection errors.

• 📱 Version. MIUI: Upgrade your smartphone to the latest stable firmware. MIUI 11 and below may cause problems with Bluetooth 5.0, which uses Mi Band 4.
• 🔋 Bracelet charge: Battery level should be at least 20%. When the discharge is less than 15%, the bracelet goes into energy-saving mode and may not respond to requests.
• 📲 Free space: The smartphone should have at least 500 MB of free space for installation of Mi Fitness and data cache.
• 🌍 Account Region: If your Mi Account is registered in China, some features (such as notifications from third-party apps) may be limited.

It’s also worth turning off the VPN and checking to see if antivirus (such as Mi Security) is blocking Bluetooth access, which sometimes recognizes attempts to connect wearable devices as suspicious activity.

2. Installation and configuration of the Mi Fitness application

The official Mi Band 4 management app is Mi Fitness (formerly Mi Fit) and should be downloaded exclusively from official sources:

• 📥 Google Play: Link (for global firmware).
• 📥 AppGallery: Relevant for Redmi on MIUI China without Google services.
• 📥 APK-File: Only from apk.xiaomi.com (caution: third-party sources may distribute modified versions with ads).

After installation:

1. Open Mi Fitness and log in via Mi Account (required!) without an account binding, the bracelet will work in limited mode.
2. Enable geolocation and allow the app to access Contacts, Notifications and Phone (necessary to display incoming calls).
3. Go to Profile → Settings → Notifications and activate the “Show notifications on your device” option.

Important: If you use Redmi with firmware for the Chinese market, Mi Fitness may not have Russian, so you can change your account region to Russia in your Mi Account settings.

Install the latest version of the application |Authorize in Mi Account|Enable geolocation and permissions |Deactivate VPN and antivirus |Check your account region (for Chinese firmware)

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3. Step-by-step instructions: how to connect Mi Band 4 to Redmi

Now, to the synchronization process itself, follow the instructions in strict order.

1. Activate Bluetooth on your smartphone: go to Settings → Bluetooth and turn it on. Make sure Visibility for All mode is off — it is not needed for the connection.
2. Remove the bracelet from the package and remove the protective film from the charging contacts. Press the Mi Band 4 touch button to wake the screen.
3. Press the button on the bracelet for 5 seconds until it appears. QR-This will put the device in pairing mode.
4. In the Mi Fitness app, click Add Device → Bracelet → Mi Smart Band 4.
5. Scanner. QR-Code: Put the smartphone camera on QR-If the scan fails, select "Plug manually".
6. Confirmation: The bracelet will be asked to pair - tap the tick on the screen.

If the scanning stage QR-When you have a “failed to connect” error, try it:

• 🔄 Reboot Bluetooth on your smartphone (disable/enable).
• 📱 Remove the Mi Fitness app cache in the App settings → Warehouse → Clear the cache.
• 🔋 Reset the bracelet (press the button for 10 seconds before vibration).

4. Notification setting and data synchronization

After successful connection, you need to set up notifications and background synchronization, otherwise the bracelet will not display incoming calls or messages.

In the Mi Fitness app:

1. Go to Profile. → Mi Smart Band 4 → Notifications.
2. Activate the switches for: 📞 Incoming calls 💬 Communications (SMS, WhatsApp, Telegram and others.) 🔔 Applications (select the necessary manually)

"Show the contents of the notifications"

For stable operation on Redmi also requires:

• 🔄 Allow Mi Fitness Autostart: Settings → Annexes → Application management → Mi Fitness → Auto-start.
• 📱 Disable battery optimization for the application: Settings → Battery → Optimizing the battery → All applications → Mi Fitness → No restrictions.
• 🔗 Enable background data transfer: Settings → Annexes → Mi Fitness → Transfer of data → Allow background transmission.

Important for MIUI 14: In newer firmware versions, Xiaomi has added additional protection for Bluetooth devices. If notifications come with a delay, go to Settings → Communication and Sharing → Bluetooth → Additional → Connection Priority and select Mi Smart Band 4 as your priority device.

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If notifications are duplicated (coming to both the phone and the bracelet), turn them off in the settings of a particular messenger. For example, in Telegram: Settings → Notifications → Disable on a smartwatch.

5. Common mistakes and their solutions

Even with the right connection, Redmi users can face typical problems, and below is a table of the most common errors and how to fix them.

Critical error: If the bracelet is no longer defined after the Mi Fitness update, try to roll back to the previous version of the app.

1. Delete the current version.
2. Download APK from version 4.6.0 (stable for Mi Band 4) from apkcombo.com.
3. Turn off automatic updates to the app in Google Play.

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If none of the methods worked, reset the bracelet to factory settings: in Mi Fitness go to Profile → Mi Smart Band 4 → Untie the device, then on the bracelet press the button for 20 seconds before the appearance of the Mi logo.

6. Optimization of the bracelet with Redmi

To make Mi Band 4 work as efficiently as possible, set the following settings:

• 🔋 Screen: Set the backlight time to 5-7 seconds (Profile) → Screen. → It'll save you charge without sacrificing convenience.
• 🏃 Activity tracking: Turn on Auto-Detect Workouts for running and walking, but turn off for other types (saves battery).
• 🌙 Sleep monitoring: Activate Smart Mode instead of Sensitive – this will reduce false positives.
• 🔔 Alarm clocks: Set the vibration through the app – it is more reliable than the standard sound alarm on the phone.

Redmi users with MIUI 14 have a hidden feature: weather synchronization, to activate it:

1. In Mi Fitness, go to Profile → Mi Smart Band 4 → Display → Weather.
2. Select the data source: System Weather (using data from Redmi) or Mi Weather.
3. Allow the app to access Location and Weather Sensors.

Tips for saving charge: Turn off the "Constant pulse" in the bracelet settings and set the measurement interval for 30 minutes. This will extend the autonomy from 15 to 20 days.

7. Alternative ways of connecting

If the standard method doesn’t work, try alternatives:

Method 1: Connect with Notify & Fitness for Mi Band

The third-party app Notify & Fitness supports Mi Band 4 and offers advanced notification settings. Download it from Google Play and:

1. Untie the bracelet from Mi Fitness.
2. In Notify & Fitness, select Add Device" → "Mi Band 4".
3. Follow the instructions on the screen (similar to the standard connection).

Advantages of this method:

• 📊 More settings for setting notifications (application filtering, vibrations, etc.).
• 🔄 The ability to sync with Google Fit.
• 🛠 Less often there are connection errors on Redmi with custom firmware.

Method 2: Manual connection via Bluetooth settings

If the app doesn’t see the bracelet, try connecting manually:

1. On Redmi, go to Settings → Bluetooth.
2. Enable device search and select Mi Band 4 from the list (the name may be displayed as "MI Band 4_XXXX").
3. Confirm the pairing on the phone and bracelet.
4. Start Mi Fitness – the device must be automatically determined.

⚠️ Note: When manually connected, some features (such as the bracelet firmware update) may not be available. Use this method only if the standard one does not work.

FAQ: Answers to Frequent Questions