Xiaomi Mi Band 4: how to properly link to your phone and configure synchronization

Why Mi Band 4 is still relevant in 2026

Despite the release of new Xiaomi fitness bracelets, the Mi Band 4 remains one of the most popular devices among users, its reliability, long battery life (up to 20 days in standby mode), and rich functionality — from sleep monitoring to music control — make it a great choice even years after its release.

However, many people have difficulty connecting the bracelet to a smartphone for the first time, especially for owners of new phones on Android 13/14 or iOS 16/17, where compatibility issues may occur. In this article, we will discuss all the ways to sync, including bypassing typical errors, and show how to make the most of the Mi Band 4.

Important: if you purchased a used bracelet or after long storage, before pairing, be sure to reset to factory settings. This will eliminate conflicts with previous devices.

What you need to connect to Mi Band 4

Before you start syncing, make sure you have everything you need:

• 📱 Smartphone on Android 5.0+ or iOS 10.0+ (Bluetooth 4.0 support is mandatory)
• 🔋 Charged Mi Band 4 (battery level not lower than 20%)
• 📲 Official Mi Fitness app (formerly Mi Fit) or Zepp Life app (for new firmware)
• 🔑 Xiaomi or Zepp account (can be created during setup)

Modern versions of the applications can automatically determine the bracelet model, but for the Mi Band 4, it is better to use Mi Fitness versions 4.6.0-5.8.0. Newer releases are optimized for the Mi Band 6/7 and can work unstable.

Step-by-step: how to connect Mi Band 4 with Android

The process of connecting to Android phones is usually smooth, but there are nuances that many people are not aware of.

1. Install the app: Download Mi Fitness from Google Play. Avoid third-party APKs - they may contain outdated Bluetooth libraries.
2. Sign up for an account: When you first start up, the system will suggest you sign in via Xiaomi, Google or Facebook. Choose a convenient way. If you already have an account in the Xiaomi ecosystem (for example, for a smartphone or router), use it - this will make it easier to synchronize data between devices.
3. Enable Bluetooth and geodata: Go to your phone’s settings and activate: 🔵 Bluetooth (Visibility Mode – For All Devices") 📍 Geodata (required for the correct operation of the pedometer) 🔄 Auto-run for Mi Fitness (in battery settings)

Add the device.

In the app, click Profile → Add Device → Bracelet → Mi Smart Band 4. The system will start searching. If the bracelet is not located, reboot the Bluetooth on the phone.

Confirm the conjugation

The bracelet will have a 4-digit code on its screen, compare it to what's displayed in the app and confirm the link. If the code doesn't show up, press the Mi Band 4 touch button before it vibrates.

The bracelet is displayed in the list of devices |Time and date are synchronized | Battery level is shown |Notification available (test message)

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⚠️ Note: On Samsung phones with One UI 5.0+ Mi Fitness background activity may be blocked. To fix this, go to Settings. → Annexes → Mi Fitness → Battery → Optimize application performance and disable optimization.

Mi Band 4 with iPhone: features and life hacks

iPhone owners often face problems when linking the Mi Band 4 due to the limitations of iOS.

• 🍎 Use only the official app from the App Store. Third-party utilities (like Notify & Fitness) don't support full sync.
• 🔄 After installing the app, reboot your iPhone – this will reset the Bluetooth cache and eliminate possible conflicts.
• 📶 Enable geolocation services for Mi Fitness (in privacy settings). Without this, the pedometer will not work properly.
• 🔋 If the bracelet is not located, turn off Bluetooth for 10 seconds, then turn on again and repeat the search.

On iOS 16/17, you may experience a "Disconnected" error.

1. Remove the bracelet from the list of devices in Mi Fitness.
2. Forget the device in Bluetooth settings on your iPhone.
3. Reinstall the Mi Fitness app.
4. Repeat the pairing procedure.

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If no notifications come after you connect to your iPhone, open Settings → Notifications → Mi Fitness and turn on the “Show on the Lock screen” option.

Setup of notifications and data synchronization

Once connected successfully, you need to set up alerts and automatic synchronization, without which the bracelet will not display incoming calls, messages and health data.

How to set up notifications:

1. Open Mi Fitness and select your Mi Band 4.
2. Go to Application Notifications.
3. Turn on the switch for the desired messengers (WhatsApp, Telegram, SMS, etc.).
4. Set up the Vibration and Screenlighting at notifications.

To synchronize health data:

• 🩺 Enable Heart Rate Monitoring (in Profile section) → Settings of the device → Monitoring of heart rate).
• 😴 Activate Sleep Tracking (Sensitive mode recommended for accurate data).
• 🏃 Enable Autodefinition of Workouts (walking, running, cycling).

⚠️ Attention: On Android 12+ The system can block Mi Fitness background synchronization. To avoid this, add the application to Battery Optimization Exceptions (path: Settings) → Battery → Optimizing the battery → All applications → Mi Fitness → No restrictions).

Common mistakes and their solutions

Even with the right connection, users are experiencing crashes.-5 problems and ways of eliminating them:

• 🔴 Bracelet not in search: Solution: Reboot Mi Band 4 (press the touch button for 10 seconds before vibration). Turn off Bluetooth on your phone, then turn it on again. Delete the cache of the Mi Fitness app (Settings) → Annexes → Mi Fitness → Memory. → Clear the cache).

Data is not synchronized

No notifications coming.

Decision:

• Check the permissions for Mi Fitness in your phone settings (Notifications → Access Notifications).
• Turn off the "Do Not Disturb" or "Energy Saving" modes.
• Reconnect the bracelet (remove and add again).