Sync Xiaomi Mi Band 4 with phone: full instruction from preparation to error solving

The Xiaomi Mi Band 4 fitness bracelet remains one of the most popular wearables due to its combination of functionality and affordable price, but new users often have questions about how to connect the bracelet to the phone, what applications are needed and what to do if synchronization does not work.

It's important to understand that the synchronization process depends on the smartphone's operating system (Android or iOS), the firmware version of the bracelet, and even the phone model. We'll look at the universal steps that will work for most devices, and also focus on the nuances for different platforms. If you just unpacked the Mi Band 4 or encountered errors when connecting, this will be your guide.

Before you get to the bottom of the game, make sure you have everything you need: a charged bracelet (at least 20% of the battery), a smartphone with Bluetooth enabled and internet access, and a little patience — sometimes the process takes up to 5 minutes. Ready? Then get started!

Preparing for synchronization: what to do before connecting

Before you connect the Mi Band 4 to your phone, follow a few preliminary steps to avoid most errors and speed up the setup process.

1. Check the compatibility of the devices. The bracelet officially supports:

• 📱 Android 5.0 and higher with Bluetooth 4.0 support)
• 🍎 iOS 10.0 and higher (iPhone) 5s newer)

On older smartphones (like Android 4.4), the Mi Fit app may not install or work with bugs. Also make sure the phone has enough free storage – the app requires around 100MB.

2. Charge the bracelet. Minimum charge level for first synchronization — 20%, But it's better to charge up to 50-60%. Get Mi Band on board. 4 To the charger (use the original cable!) and wait for the charging indicator to appear on the screen. 2 hours.

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If the bracelet is not responsive to the charging connection, try to clean the contacts on the back of the device with a cotton swab dipped in alcohol, often the problem lies in oxidation or contamination of the contacts.

3. Install the official application. You will need Mi Fit to sync. Android/iOS) Or Zepp Life, an alternative app from Xiaomi, download it from official stores:

• 🤖 Mi Fit in Google Play
• 🍎 Mi Fit in the App Store

Avoid third-party APK-Files – they may contain malicious code or outdated versions that are incompatible with the Mi Band 4.

4. Enable Bluetooth and geolocation. On Android, go to Settings → Connections → Bluetooth and activate the module. On iPhone: Settings → Bluetooth. Geolocation is required for certain functions to function correctly, such as step counting.

Charge Mi Band 4 to 50%|

Install the Mi app Fit/Zepp Life|

Turn on Bluetooth on your phone |

Insert geolocation (optional)|

Check the compatibility of the phone OS-->

How to connect Mi Band 4 to your phone

Now, to the synchronization process itself, follow the instructions carefully, because the order of action is important.

Step 1. Launch the Mi Fit app. Once installed, open the program and sign up (or log in to an existing Xiaomi account). If you don't have an account, create it via email or phone number. Without authorization, sync is impossible!

Step 2. Add a new device. In the main menu of the application, click on the icon "+" (or "Add device" and select Mi Smart Band 4 from the list. If your model is not available, update the app to the latest version.

Step 3: Allow the necessary permissions. The application will request access to:

• 📱 Contacts (to display notifications)
• 📍 Geolocation (for accurate calculation of steps)
• 📞 Notifications (to make the bracelet vibrate when calling)/SMS)
• 💾 Memory (for backup of data)

Press Allow for all requests. Without these permissions, some of the features of the Mi Band 4 will not work.

Step. 4. Hold the bracelet to your phone, make sure the distance between the devices is not greater than 10 See the Mi Band screen. 4 A unique code will appear (4-6 numerals - compare it to the code in the app. If the codes match, click "Confirm".

Step 5: Wait until the sync is complete. It can take 1 to 5 minutes, depending on the speed of the Internet and the firmware version. The device will be notified on the screen, and the bracelet will automatically update the time and date.

Android|

iOS (iPhone)|

Other (specify in the comments)-->

Configure notifications and basic functions after synchronization

After successfully connecting the Mi Band 4 to the phone, you can start personalizing. Let's look at the key settings that configured costs right away.

1. Call and text notifications, so that the bracelet vibrates when incoming calls or SMS:

1. Open Mi Fit. → Choose your Mi Band 4 → "Notifications".
2. Activate the switches next to "Calls" and "Messages".
3. For Android: Click on “Notification Settings” and select the apps (WhatsApp, Telegram, etc.) you want to see on your bracelet.

On the iPhone due to the limitations of iOS, you can configure notifications only about calls and SMS. For messages from messengers, you will need an additional application, for example, Notify for Mi Band (available from the App Store).

2.Set up the screen and dials. Mi Band 4 supports removable watch faces.

1. In Mi Fit, go to the "Screen" section" → "Screen style".
2. Choose your favorite dial from the collection (there are both standard and thematic options).
3. Click on "Sync" to apply the changes.

Please note: some dials require additional payment (on average) 1-3$). Free options can also be downloaded from third-party sources, but this requires manual installation through.bin files.

3. Activation of additional functions: In the bracelet menu (available via swipes on the screen) you can include:

• 🏃‍♂️ Heart rate monitoring (included in Mi Fit) → Heartbeat → Frequency of measurements)
• 💤 Sleep tracking (automatically activated after first synchronization)
• 🚶‍♂️ Calorie and Step Counting (configured in Profile) → Activity targets)
• 🔋 Notifications of low battery charge

💡

To accurately track sleep, wear the bracelet on your non-working arm (left hand for right-handers, right hand for left-handers) and tightly, but not tightly, which minimizes sensor errors.

The Mi Band 4 supports up to 10 alarm clocks that can be set directly from the bracelet or through the app:

1. At Mi Fit, go to the alarm clock.
2. Press "+" and specify the time, days of the week and type of vibration.
3. Activate the "Repeat" option if you need an alarm on a regular basis.

The bracelet will vibrate even if the phone is turned off or in silent mode. The vibration intensity is adjusted in the device settings.

Mi Band 4 firmware update: why it matters and how to do it

Regular firmware updates Mi Band 4 fixes bugs, adds new features and improves stability. Skipping updates is not recommended - especially if you are faced with bugs like spontaneous reboots or synchronization problems.

How to check the current version of the firmware:

1. Open the Mi Fit and select your bracelet.
2. Go to "Device Profile" → "Firmware version".
3. Compare it to the latest version available on the official website.

The current firmware for the Mi Band 4 for June 2026 is 1.0.9.58 (may vary by region).

How to update the firmware through Mi Fit:

1. Connect the bracelet to your phone and open the Mi Fit.
2. Go to "Device Profile" → "Update of the PO".
3. If a new version is available, click "Update".
4. Wait until the process is complete (don't turn off Bluetooth!) the bracelet will reboot automatically.

Update takes 5-10 Do not interrupt the process or turn off the phone, which can lead to the bracelet becoming a non-working device).

1. Reset the bracelet (clasp the button for 10 seconds).

2 Remove it from Mi Fit and reconnect it.

3. Update the Mi Fit app itself in the app store.-->

Manual update via.fw. If the automatic update doesn’t work, you can install the firmware manually:

1. Download the latest firmware version (.fw file) from mi-band.ru.
2. Put the file in the folder. MiFit/firmware phone-on.
3. In Mi Fit go to "Device Profile" → "Update of the PO" → "Local Update".
4. Select the downloaded file and wait for the installation to be completed.

This method is suitable for advanced users. If after manually updating the bracelet stopped working, try resetting it to factory settings (see next section).

What to do if Mi Band 4 is not synced

Even with the right connection, there are some failures, and let's look at the most common errors and how to fix them.

1. The bracelet is not searched. If Mi Fit doesn't see Mi Band 4:

• 🔄 Reset the bracelet (press the button for 10 seconds before the Mi logo appears).
• 📱 Reboot your phone and turn Bluetooth on/off.
• 🚫 Make sure the bracelet is not connected to another device (e.g., a tablet).
• 🔌 Check the bracelet charge – at a level below 5%, synchronization is blocked.

2. "Unable to connect" or "Unsynced." Common reasons:

• 📵 Unstable Internet connection (check mobile traffic or Wi-Fi).
• 🔒 Older version of Mi Fit (update the app).
• 🛑 Conflict with other fitness apps (like Google Fit) Close them through Task Manager.
• 📡 Interference from other Bluetooth devices (earphones, smart watches) Turn them off temporarily.

3. The bracelet is plugged in, but it doesn't show notifications.

• 🔔 Permissions for Mi Fit in phone settings (Settings) → Annexes → Mi Fit → Notifications).
• 📵 Do Not Disturb on the bracelet (disabled via Mi Fit) → Don't disturb).
• 📱 Power saving settings (on some phones) Xiaomi/Redmi Add Mi Fit to the list of "Auto-Start").

4. The bracelet is constantly switched off. This can happen because of:

• 🔋 Battery discharge (charge to 100%).
• 📱 Android Background Optimization (Add Mi Fit to Exceptions).
• 🔄 Firmware conflict (update bracelet and app).
• 📡 Too much distance between devices (maximum 10 meters).

⚠️ Warning: If the bracelet doesn't sync after all the manipulations, try using another app, Zepp Life (formerly Amazfit), which is often more stable, especially on custom firmware phones.

Compatibility of Mi Band 4 with different smartphones: nuances for Android and iOS

While the Mi Band 4 officially supports both popular mobile platforms, there are differences in functionality and settings.

On Android:

• ✅ Full support for notifications from all applications (SMS, messengers, social networks).
• ✅ Ability to respond to messages with quick answers (on some firmware).
• ✅ Advanced power saving settings (you can turn off background activity to save battery).
• ⚠️ On the phones with MIUI (Xiaomi/Redmi) conflicts may arise due to duplicate functions (for example, built-in pedometer).

On iOS (iPhone):

• ✅ Stable synchronization without breaks (thanks to Apple’s optimized Bluetooth stack).
• ❌ Limited notifications – only calls and SMS (because of Apple's policies).
• ❌ No support for quick responses to messages.
• ⚠️ Frequent background update issues (you have to open Mi Fit manually to sync your data).

Features for phones Xiaomi/Redmi/Poco:

On firmware devices MIUI There are additional settings to optimize the Mi Band 4:

1. Open Settings → Applications → Application Management → Mi Fit.
2. Turn on the options: 🔄 Auto-start 📱 Display over other windows 🔋 No battery restrictions

Settings → Battery and productivity → Choice of battery mode

Mi Fit

⚠️ Note: On Huawei phones with EMUI You may need to disable the Battery Optimization feature for the Mi Fit. Otherwise, the bracelet will be disabled through the 5-10 minutes of inactivity.

Mi Band 4 apps: When Mi Fit doesn't work

If the standard Mi Fit application is unstable or you lack features, alternative programs can be used. They often offer advanced customization options and better compatibility with custom firmware.

1. Zepp Life (formerly Amazfit) The official app from Xiaomi, which was originally developed for the Amazfit smartwatch, but also supports the Mi Band 4.

• 📊 More detailed statistics of sleep and activity.
• 🎨 More free dials.
• 🔄 It works more stable on custom firmware (LineageOS, etc.).

Downloadable from the following links:

• 🤖 Zepp Life on Android
• 🍎 Zepp Life on iOS

2. Notify & Fitness for Mi Band. Third-party app with advanced notification features.

• 📩 Notifications from any applications (including Telegram, Viber, Email).
• 🔄 Vibration and notification icons.
• 📊 Exporting data to Google Fit/Apple Health.

The paid version (about 3)$), But there's a free trial period.

3. Mi Bandage, an application for advanced users, allowing:

• 🔧 Install unofficial firmware and dials.
• 📥 Backup of bracelet settings.
• 🔄 Adjust hidden parameters (for example, pulse rate measurement).

Requires root rights to Android or jailbreak to iOS. source code on GitHub.

⚠️ Note: Using unofficial firmware can lead to loss of warranty and unstable bracelet operation.Before experiments, make a backup of the data via Mi Fit.

FAQ: Answers to Frequent Questions about Mi Band Synchronization 4