Connecting Xiaomi Mi Band 4 to a smartphone: full instruction with solutions to problems

The Xiaomi Mi Band 4 fitness bracelet remains one of the most popular wearables due to its combination of functionality and affordable price. However, even experienced users sometimes have difficulties with initial configuration, especially when it comes to syncing with a phone. In this article, we will discuss not only the basic connection process, but also the nuances of working with different operating systems, firmware versions, as well as typical errors that can interfere with successful connection of devices.

It is important to understand that the Mi Band 4 connection procedure differs from newer models (e.g. Mi Band 6/7) due to the Bluetooth Low Energy (BLE) protocol and the Mi Fitness app version.If you have previously used other Xiaomi trackers, some steps may seem familiar, but there are key differences, which we will discuss below.

Preparation for connection: what to check before starting

Before you start syncing, make sure your smartphone and bracelet meet the minimum requirements, which will save you most of the problems during the connection phase.

Phone requirements:

• 📱 Operating system: Android 5.0+ or iOS 10.0+ (iPhone 5S On older versions, the Mi Fitness app may not install or work properly.
• 🔄 Bluetooth: version 4.0 or higher (BLE Supported with Android 4.3, but better 5.0 for stable operation+).
• 📶 Internet: Connect to Wi-Fi or mobile network to download the application and update the bracelet firmware.
• 🔋 Battery charge: the bracelet must have at least 20% charge, otherwise the connection process may be interrupted.

Requirements for the Mi Band 4 bracelet:

• 🔄 Firmware: Up-to-date software (check the bracelet settings after you connect) Outdated firmware can cause synchronization errors.
• 🔒 Resetting: If the bracelet has already been in use, it is recommended to reset to factory settings (press the touch button for 10 seconds before vibration).
• 📦 Package: Make sure the original charging cable is in the box - unoriginal accessories can damage the contacts.

⚠️ Note: If you upgrade your smartphone to Android 12+ or iOS 15+, You may need to manually allow Mi Fitness to access geolocation and notifications without which some of the bracelet’s features (such as incoming calls) won’t work.

Installation and configuration of the Mi Fitness application

The official Mi Band 4 management app is Mi Fitness (formerly Mi Fit), which can be downloaded for free from Google Play or the App Store, and it is important to use this software, since third-party alternatives (such as Notify & Fitness) do not support all the features of the original bracelet.

Step-by-step installation instructions:

1. Go to your phone’s app store and find Mi Fitness (developer: Xiaomi Inc.).
2. Install the app and open it. The first time you run it, you’ll need to create a Xiaomi account (or sign in through an existing one).
3. From the app menu, select Profile → Add Device → Bracelet → Mi Smart Band 4.
4. Follow the hints on the screen. At the connection stage, make sure that the Bluetooth on the phone is on.

After installation, the application may request additional permissions:

• 📍 Geolocation: needed to display weather and track activity.
• 📞 Notifications: to have the bracelet show incoming calls and messages.
• 📁 Storage: To store training data.

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If the app doesn’t find the bracelet, try restarting Bluetooth on your phone (turn off and turn on again) or reinstall Mi Fitness.

Connecting Mi Band 4 to your phone

Once the application is installed, you can start synchronizing, which takes 2-3 minutes if done correctly.

Instructions for Android:

1. Open Mi Fitness and click Add Device.
2. Select the Mi Smart Band 4 from the list.
3. Press the bracelet screen to unlock it (if it is locked).
4. Hold your phone closer to the bracelet (up to 10 cm) and wait for vibrations on both devices.
5. Confirm the connection in the application and on the bracelet (click on its screen).

Instructions for iOS (iPhone):

1. Turn on Bluetooth in your iPhone settings (Settings → Bluetooth).
2. Open Mi Fitness and select Mi Smart Band 4 from the device list.
3. The bracelet will show a confirmation code – compare it with the code in the application and click Confirm.
4. Wait until the synchronization is complete (it can take up to 1 minute).

⚠️ Attention: On iPhone with iOS 16+ You may be notified to allow Mi Fitness to access your local network without the bracelet not being able to synchronize your steps and sleep data.

The bracelet vibrated when the ligament was|The app displays the charge level of the Mi Band 4|On the main screen of the bracelet appeared the icon of the phone|Step data synchronized-->

Configure notifications and basic functions

After you connect, you need to customize the bracelet to your needs. Mi Band 4 supports displaying notifications from messengers, incoming calls, alarms and even music management.

How to enable notifications:

1. In the Mi Fitness app, 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 (e.g. WhatsApp, Telegram, Viber).
4. Set up the vibration and backlight of the screen when notified.

Additional functions:

⚠️ Note: If notifications don’t arrive on the wristband, check your phone’s power saving settings.Some manufacturers (e.g. Xiaomi, Huawei) restrict the background of applications, which prevents synchronization.

Update of the firmware Mi Band 4

Regular firmware updates fix bugs, add new features and improve stability. Xiaomi releases updates for the Mi Band 4 approximately every 2-3 months.

How to update firmware:

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 (weighing usually 1-3 MB).
4. Confirm the installation on the bracelet (click on its screen).
5. Do not disable Bluetooth or move your phone far from the bracelet until the process is complete (it can take up to 5 minutes).

The latest stable firmware version for the Mi Band 4 for June 2026 is 1.0.9.54, which corrects errors with heart rate data synchronization and adds support for new dials.

⚠️ Warning: If the bracelet stopped responding to touch during the update, don't panic - wait 10 minutes. If the problem does not disappear, reset (Settings) → Resetting in annex).

Solving common connection problems

Even with the right setup, users sometimes encounter errors, and let's look at the most common ones and how to fix them.

Problem 1: The bracelet is not in the app

• 🔄 Reboot Bluetooth on your phone.
• 📱 Make sure the bracelet is unlocked (click on its screen).
• 🔋 Check the bracelet charge (at a level below 10% the connection may not work).
• 📲 Reinstall the Mi Fitness app.

Problem 2: Data synchronization is not working

• 🔄 Turn off and turn on Bluetooth again.
• 📱 In the phone settings, allow Mi Fitness to autostart and work in the background.
• 🔄 Reset the bracelet (press the touch button for 10 seconds).
• 📲 Update the bracelet firmware to the latest version.

Problem 3: The bracelet is constantly off

• 📶 Check if there are any interference from other Bluetooth devices (headphones, speakers).
• 🔋 Replace the charging cable – a faulty accessory can cause failures.
• 📱 Reset the bracelet settings to factory.

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If neither of these methods worked, try connecting the bracelet to another phone, and if the problem persists, it's a hardware malfunction that needs repair.

Reset Mi Band 4 to factory settings

If the bracelet is unstable or you want to sell it, perform a complete reset.This will delete all data from the device, including pairs with the phone.

How to reset your settings:

1. On the bracelet, go to Settings → Additional → Reset (scroll down the screen).
2. Confirm the action by clicking on the screen.
3. Wait for the vibration and reset of the bracelet (it will take about 30 seconds).

Alternatively, if the screen is not responding:

1. Connect the bracelet to the charger.
2. Press the touch button for 20 seconds until you feel the vibration.
3. Release the button - the bracelet will reboot in factory condition.

⚠️ Warning: After resetting, the bracelet will automatically unplug from the Mi Fitness account. To connect it again, you will need to repeat the sync procedure from scratch.

FAQ: Frequently Asked Questions