Xiaomi Mi Band 4 Connection to Android via Bluetooth: A Complete Guide to Error Solutions

The Xiaomi Mi Band 4 fitness bracelet remains one of the most popular wearables even years after its release, thanks to a balance of functionality, sensor accuracy and affordable price. However, many users face difficulties when connecting the bracelet to an Android smartphone for the first time, especially when it comes to pairing via Bluetooth. In this article, we will examine not only the standard procedure for communicating devices, but also the nuances that the manufacturer does not say: from choosing the right version of the application to avoiding typical errors like the “invisibility” of the bracelet or synchronization failures.

It’s important to understand that the Mi Band 4 supports two firmware versions, Chinese and global, and not only the interface language of the bracelet depends on this, but also compatibility with the official Mi Fit app (now Zepp Life).We’ll talk in detail about how to determine the version of your device and what to do if the smartphone “does not see” the bracelet that Bluetooth is on, you will also learn how to set up notifications, synchronize steps and pulse, and most importantly, avoid common errors that cause users to reset the bracelet to factory settings.

If you've tried to connect Mi Band 4 and you get a message like, "Disconnected to the device" or the bracelet is constantly disconnected, don't be quick to blame the technology. 80% of the time, the problem lies in the settings of the smartphone, the version of the application or the conflict with other Bluetooth devices, and then we'll take a step-by-step look at the entire process, from the preparation of the phone to the final synchronization, and also give a checklist for the diagnosis of the problem.

Preparation of a smartphone and bracelet for connection

Before you start pairing, make sure your Android smartphone and Mi Band 4 are ready to communicate, a step that is often missed, leading to errors such as not being able to find the bracelet in the list of devices or synchronization failures.

First, check the Android version: the bracelet officially supports Android 5.0 and newer devices, but Android 7.0+ is recommended for stable operation. If you have outdated firmware, some features (such as notifications or music control) may not work correctly. Update the OS in Settings → System → System Update.

Second, make sure your smartphone is enabled with Bluetooth and geolocation (yes, it’s needed to find devices in some versions of Android), and turn off the power saving mode, which can block background activity of the Zepp Life app, which will cause the connection to break. You can check this in the settings. → Battery → Energy saving regime.

• 📱 Update Android to the current version (minimum 5.0, optimally 7.0)+).
• 🔵 Activate Bluetooth and let the Zepp Life app use it.
• 📍 Enable geolocation (required to scan devices in the background).
• 🔋 Turn off the power saving mode for the Zepp Life app.
• 🚫 Remove old Mi Fit or Zepp versions if installed.

For the bracelet itself, charge it to 100% before you connect, with a low battery level (<20%), synchronization may fail. Also make sure the bracelet is not paired with another device. If it was previously connected to another smartphone, reset it to factory settings: press the touch button for 10-15 seconds until the vibration and the Mi logo appear.

Charge the Mi Band 4 before 100%|Update Android to 7.0+|Enable Bluetooth and geolocation|Turn off the power saving mode|Remove old versions of Mi Fit/Zepp|Remove the bracelet if it has been previously paired-->

Choosing the right app: Zepp Life vs Mi Fit

One of the key points is the choice of the app to connect. Mi Band 4 used to be exclusively Mi Fit, but since 2021 Xiaomi has moved all wearable devices to the Zepp Life platform (formerly Amazfit), but both apps are still available on Google Play, which causes confusion.

Which app to choose?

• 🆕 Zepp Life is the official app for new Xiaomi devices (including Mi Band 4 with global firmware) and supports all features including notifications, sleep control and workouts.
• 📱 Mi Fit is an outdated app, but may be needed for the Chinese version of the bracelet (Mi Band 4) NFC or firmware devices for the Chinese market, not updated since 2022.

If you have a global version of the Mi Band 4 (check the box or bracelet settings), install Zepp Life. The Chinese version (with NFC or AliPay support) may require Mi Fit, but be prepared for restrictions: for example, without a Chinese Xiaomi account, some features will be blocked.

Once you install the app, don't start it right away. First, allow all the permissions you need manually:

1. Go to Settings → Applications → Zepp Life → Permissions.
2. Enable access to: 📍 Geolocation (to search for devices) 📂 Storage (for backup copies) 🔵 Bluetooth (for connection) 🔔 Notifications (for display on the bracelet) 🕒 Auto-run (to make the application work in the background)

Zepp Life|Mi Fit|Notify & Fitness|Other|I don't know.-->

Step-by-step instructions for connecting via Bluetooth

Now, to the interface process itself, follow the instructions carefully, and skipping even one step can lead to errors.

Step 1: Launching the application and registering

Open Zepp Life (or Mi Fit) and sign up/authorize. If you already have a Xiaomi account, use it to make it easier to sync data between devices. When you first start up, the app will prompt you to add a device — click Add Device.

Step 2: Choosing a bracelet model

In the list of devices, find the Mi Smart Band 4 and select it. If your model is not listed, update the app or check if you have Chinese firmware installed (in which case you may need Mi Fit).

Step 3: Connect via Bluetooth

The app will request Bluetooth and start searching for devices. Make sure the bracelet is near the smartphone (no further). 1 And it's vibrating, and it's a signal that you're ready to connect. 4 with a unique number (for example, MI4_1A2B). Choose him.

Step 4: Confirmation of connection

The bracelet will have a 4-digit code (e.g., 1234) on its screen. Compare it to the code in the app — if they match, click "Confirm" on your phone and tap the touch button on the bracelet. If the codes don't match, reboot the bracelet (press the button for 5 seconds) and try again.

Step 5: Update the firmware (if necessary)

Once successfully connected, the app may suggest updating the bracelet firmware. Don't interrupt the upgrade process, which may lead to the device "bricking" (the bracelet will stop turning on), make sure that the bracelet charge is at least 50% and the smartphone is connected to charging.

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If the bracelet is not on the list of devices, try rebooting Bluetooth on your smartphone: turn it off and turn it on again in the notification bar.

Solving common connection problems

Even with the correct following of the instructions, errors can occur, and let's look at the most common ones and how to fix them.

Problem 1: The smartphone does not see the Mi Band 4

Causes and solutions:

• 🔄 Reboot Bluetooth on your phone and bracelet (press the button on your bracelet for 5 seconds).
• 📱 Remove the Bluetooth cache: Go to Settings → Annexes → Show system-based → Bluetooth → Warehouse → Clear the cache.
• 🚫 Disable other Bluetooth devices (earphones, speakers) that may interfere.
• 🔧 Check compatibility: Some phones (like Huawei or Xiaomi with custom firmware) block third-party Bluetooth devices from connecting.

Problem 2: “I couldn’t connect to the device” error

This error often occurs due to:

• 🔒 Blocking the application with a security system (for example, MIUI Optimizer on Xiaomi smartphones.Solution: Add Zepp Life to exceptions in Settings → Annexes → Special access → Optimizing the battery.
• 📡 Weak Bluetooth signal. Try to hold the bracelet as close to the phone as possible (10-20 cm).
• 🔄 Version conflict: Update the bracelet firmware and app to the latest version.

Problem 3: The bracelet is plugged in, but immediately shut down

Guilty:

• ⚡ Power Saving Mode. Turn it off for the Zepp Life app in the battery settings.
• 📵 Interference from other devices: Turn off Wi-Fi or go to airplane mode (leaving only Bluetooth on).
• 🔄 Sync failure. Reconnect the bracelet: remove it from the list of devices in Zepp Life and pair it again.

Setup of notifications and data synchronization

After the successful connection, it's time to customize the wristband to suit your needs, and let's start with notifications, one of the most popular features.

How to Enable Notifications for Mi Band 4

1. Open Zepp Life and go to Profile → Mi Band 4 → Notifications.
2. Activate the "Notifications" switch.
3. Select the apps you want to see on your bracelet (e.g. WhatsApp, Telegram, Gmail).
4. Configure Notification Style: You can select to display only the app icon or full text (up to 120 characters).

Synchronization of data

By default, the bracelet synchronizes data (steps, pulse, sleep) every 30 minutes, but when used actively, you can start synchronization manually:

1. Open the Zepp Life app.
2. Pull the screen down to update the data.
3. Or go to the “Status” section and click “Sync”.

Setting up the display of time and date

If the bracelet does not display the time or date correctly, check:

• ⏰ Time zone on your smartphone (should match your region).
• 🔄 Automatic synchronization in bracelet settings (Profile) → Mi Band 4 → Display and brightness → Time).
• 📱 Permits for Zepp Life to access time and date.

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For stable notifications, turn off battery optimization for applications you want to receive alerts (for example, for Telegram or Viber).

Additional features: music management, alarm clocks, phone search

The Mi Band 4 not only supports basic features like step count, but also a number of useful options that many users are unaware of.

Managing music

The bracelet can control the playback of music on a smartphone:

• 🎵 Play/pause: touch the touch button on the music screen.
• 🔀 Switching tracks: swipe left or right on the screen.
• 🔊 Volume control: in some firmwares available through an additional menu (double touch on the music screen).

To activate this feature, go to Zepp Life → Profile → Mi Band 4 → Music Control and turn on the switch.

Alarm clocks and reminders

On the bracelet, you can set up to 10 alarm clocks and reminders of inactivity:

• ⏰ Adding an alarm clock: Zepp Life → Profile → Mi Band 4 → Alarm clocks → Add it. You can pick the days of the week and the vibration type.
• 🚶 Reminder of inaction: included in Settings → Reminders → Sedentary: The bracelet will vibrate if you haven't moved for more than 1 hour.

Phone search

If you have lost your smartphone, you can find it with a bracelet:

1. On the bracelet, go to the menu (swipe up the screen).
2. Select the “Search for Phone” icon (a phone with waves is shown).
3. The phone will start ringing at maximum volume, even if it was in silent mode.

Do Not Disturb mode

To turn off notifications and vibrations for a specific time (such as at a meeting or at night), activate Do Not Disturb:

• On the bracelet: swipe up → select the moon icon.
• In the appendix: Profile → Mi Band 4 → Do not disturb.

Resetting the bracelet to factory settings

If you decide to sell the bracelet, transfer it to another user, or just want to start setting up from scratch, do a reset.This can also help if the bracelet is unstable (for example, does not sync data or permanently disconnects).

Method 1: through the bracelet

1. Disable the bracelet from your smartphone in the Zepp Life app.
2. On the bracelet itself, go to the menu (swipe up the screen).
3. Find the Settings (cog) icon → Reset.
4. Confirm the action by ticking the tick. The bracelet vibrates and reboots.

Method 2: Through the application

1. Open Zepp Life and go to Profile → Mi Band 4.
2. Select "Disable the device."
3. Confirm the shutdown and reset.

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

1. Connect the bracelet to the charger.
2. Press the touch button for 20-30 seconds until you feel the vibration and see the Mi logo.
3. Release the button - the bracelet will be reset to the factory settings.

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Once reset, the bracelet will return to the default language (Chinese or English, depending on the firmware) to change the language, plug it back into the app and select the language you want in the settings.

FAQ: Answers to Frequent Questions