Registration and setup of Xiaomi Mi Band 4: a complete guide from pairing to synchronization

The Xiaomi Mi Band 4 fitness bracelet remains one of the most popular activity monitoring gadgets years after its release, and its simplicity, reliability and rich functionality — from sleep tracking to music management — appeal to both beginners and experienced users. But the first launch of the device often raises questions about how to pair it with a smartphone, what apps to use, and what to do if the bracelet does not connect to the phone.

In this article, you will find step-by-step instructions for registering the Mi Band 4 on Android and iOS devices, as well as solving typical problems from Bluetooth errors to crashes in the Mi Fitness app (formerly Mi Fit), we will break down the nuances of setting up notifications, synchronizing data, and even explaining how to update the bracelet firmware without the risk of “bricking”.

If you've just unpacked the bracelet or decided to reconnect it to a new phone, this guide will help you avoid common errors, and for those who have tried to hide the device but have had trouble, we've prepared a section on diagnosing problems, from no response to touch to endless download in the app.

Before you start, make sure your bracelet is at least 20% charged (the charging indicator lights up when you connect to the charger). Also check your smartphone compatibility: Mi Band 4 works with Android 5.0+ and iOS 10.0+.

1 What apps are needed to connect Mi Band 4

The official management app for Xiaomi Mi Band 4 is Mi Fitness (formerly Mi Fit). In 2023, Xiaomi combined several services into one application, so older versions of Mi Fit may not support new features.

You can download Mi Fitness for free:

• 📱 Android: Google Play (version no lower than 5.10.0)
• 🍎 iOS: App Store (requires iOS 10.0 or later)

In addition to the main application, some functions may require additional services:

• 🔄 Google Fit or Apple Health to export health data to other apps.
• 🔒 Xiaomi Account – Account is required for backup settings and synchronization between devices.
• 📊 Zepp Life (optional) – an alternative application with advanced sleep analytics.

If you have previously used the Mi Band 3 or older model, uninstall the old Mi Fit app before installing Mi Fitness. Version conflict can result in data loss or connectivity inability.

Step-by-step: how to register Mi Band 4 on Android

The process of pairing the bracelet with the Android phone takes no more than 5 minutes, if you follow a clear algorithm, below is a detailed instruction based on the latest updates to the Mi Fitness app.

Step 1: Turn on Bluetooth and permissions

• 📶 Open the Settings. → Connections → Bluetooth and activate the module.
• 🔓 In the Mi Fitness app settings, allow access to geodata, notifications, and physical activity (without this, the bracelet will not be able to track steps).

Step 2. Register a Xiaomi account

• 📧 Open Mi Fitness, click Profile → Sign in and create an account via email or phone number.
• 🔐 If you already have an account, log in. Without an account link, data will not be stored in the cloud.

Step 3. Add a new device

• ➕ On the main screen of the application, tap on the icon + (or Add a device).
• 🔍 Select from the Mi Smart Band 4 list (if no model, update the app).

Step 4. Connect the bracelet.

• 🔄 Press the touch button on the bracelet to wake up the screen (should appear) QR-code).
• 📱 In the application, click Connect and confirm the pairing on the phone.

After successful connection, the bracelet vibrates, and the main menu with data on the pulse, steps and battery will appear in the application.

Charge the bracelet at least 20% |

Install the latest version of Mi Fitness|

Enable Bluetooth and geolocation |

Create/log in to Xiaomi | account

Allow all application requests in phone settings-->

3. How to connect Mi Band 4 to iPhone (iOS)

The process of registering the bracelet on the iPhone is almost identical to Android, but there are several key differences associated with the limitations of iOS.For example, on iPhones Mi Band 4 does not support the display of notifications from third-party messengers (except calls and SMS).

Features of connecting to iOS:

• 📱 Mi Fitness App Must Have Bluetooth, Notifications, and Health (HealthKit) Access).
• 🔋 On the iPhone bracelet can not be updated through the application – for firmware will require Android-device.
• 📵 Call notifications only work if the Mi Fitness app is open in the background.

Instructions for connection:

1. Download Mi Fitness from the App Store and log in.
2. Go to Profile → Add the device → Mi Smart Band 4
3. Wake up the bracelet (click on the touch button) and wait until it appears QR-code.
4. In the app, click Connect and confirm pairing in the iOS system window.

If the bracelet is not detected, try:

• 🔄 Reboot Bluetooth on iPhone (Settings) → Bluetooth → Off/On).
• 📱 Remove the bracelet from the list of Bluetooth devices in iOS settings and reconnect.

💡

On iPhone, messaging notifications (WhatsApp, Telegram) don't show up on Mi Band 4 due to Apple's restrictions.Use Android if this feature is critical.

4.Solving Problems: Mi Band 4 doesn't connect to phone

If the bracelet is not paired with the phone, the reasons can be either software (app failure, outdated firmware) or hardware (Bluetooth module damaged), and below is a list of the most common errors and how to fix them.

Table: Diagnostics of connection problems

Additional steps in case of malfunction:

• 🔄 Reset your bracelet settings: Press the touch button for 10 seconds until vibrations appear.
• 📱 Clear the app's cache: Settings → Annexes → Mi Fitness → Memory. → Clear the cache.
• 🔋 Check the bracelet charge: at a level below 10%, some functions are turned off.

⚠️ If the bracelet was previously linked to another Xiaomi account, it must first be untied through the Profile. → My devices. → Remove it from your old phone, otherwise you won't be able to reconnect.

5. Set up notifications and basic functions

Once the bracelet is successfully paired with the phone, you can start personalizing. The Mi Band 4 supports notification display, music management, alarm clocks, and even weather forecast. Let's take a look at how to customize the most popular features.

How to enable notifications:

1. Open Mi Fitness and go to Profile → Mi Smart Band 4 → Notifications.
2. Activate the Call Notification and Notifications from the apps switch.
3. Select the apps you want to see on your bracelet (such as WhatsApp, Telegram).

Additional settings:

• 🎵 Music management: in Bracelet settings → Music control, turn on the option. Now you can pause tracks from the bracelet or skip them.
• ⏰ Alarm clocks: add up to 10 alarm clocks in the app (Profile) → The bracelet will vibrate at a given time.
• 🌦️ Weather: To display the forecast, allow access to geolocation in your phone settings.

Optimization tips:

• 🔋 To save charge, turn off the Raising of the Hand to activate the screen in the bracelet settings.
• 🏃 For accurate tracking of the run, turn on GPS phone in training settings.

💡

On iPhone, notifications from third-party apps (other than calls and SMS) are not supported due to Apple's restrictions.Use Android for the feature to work fully.

6.How to Update the Mi Band 4 Firmware

Regular firmware updates fix bugs, add new features (like extra dials) and improve stability.Mi Band 4 updates come through the Mi Fitness app, but there are nuances for Android and iOS.

Instructions for Android:

1. Open Mi Fitness and go to Profile → Mi Smart Band 4 → Firmware Update.
2. If a new version is available, click Update.
3. Wait for the file to load (the bracelet must be charged at least 50%).
4. Do not turn off Bluetooth or close the app until the process is complete (it takes 3-5 minutes).

Features for iOS:

• 📵 On iPhones, you can not update the firmware through Mi Fitness.
• 🔄 To update temporarily use Android device or contact the service center.

⚠️ Attention! If during the firmware update the bracelet disconnects from the phone or runs out, it may stop turning on, in which case you will need to force flashing through the PC using the Mi Band 4 Tool utility.

How to check the current version of the firmware:

1. In Mi Fitness, go to Profile → Mi Smart Band 4 → About the device.
2. Look at the firmware version line. The current version for 2026 is 1.0.9.54 or higher.

7.Reset Mi Band 4 to factory settings

If the bracelet is unstable, does not sync with the phone or you want to sell it, perform a complete reset.This will delete all data (steps, settings, dials) and untie the device from your Xiaomi account.

Method 1: Through bracelet settings

1. On the bracelet, swipe down the screen to open the menu.
2. Select Settings → More → Reset (icon with wrench).
3. Confirm the action by touching the tick.

Method 2: Through the Mi Fitness app

1. Open Mi Fitness and go to Profile → Mi Smart Band 4.
2. Press Untie the device and confirm.
3. After the bracelet is unset, it will automatically reset.

Method 3: Hardware reset (if the bracelet does not respond)

• 🔌 Connect the bracelet to charging.
• 🔘 Press the touch button for 15-20 seconds until you feel a double vibration.
• 🔄 After rebooting, the bracelet will be reset.

⚠️ Attention! After resetting, the bracelet will return to factory settings, including language (English by default). → Tongue on a bracelet.

8. Frequently Asked Questions (FAQ)