How to turn Bluetooth on Xiaomi Mi Band 4: full instructions with photos and tips

The Xiaomi Mi Band 4 fitness bracelet remains one of the most popular gadgets for monitoring activity, despite the release of new models, its key feature is ease of use, but even with such a device, users sometimes have questions. One of the most common is how to turn on Bluetooth on the Xiaomi Mi Band 4 if the bracelet does not connect to the phone or synchronize data.

In fact, the Mi Band 4 doesn’t have a separate button to turn Bluetooth on/off — it works automatically when paired with Mi Fit or Zepp Life (formerly Amazfit), but there are nuances from the correctness of the first setup to the features of the firmware. In this article, we will discuss all the ways to activate Bluetooth, possible errors and give tips on how to optimize the connection.

If your bracelet suddenly stops connecting, don't be quick to blame the technical malfunction. 80% of the time, the problem is solved by software - just follow our recommendations.

Why is Bluetooth not automatically enabled on Mi Band 4?

Many users mistakenly think that the Bluetooth module in the bracelet can be turned on / off manually, as on a smartphone. In fact, the Xiaomi Mi Band 4 uses a low-energy BLE (Bluetooth Low Energy) protocol, which is activated only when:

• 🔹 First phone connection via Mi Fit or Zepp Life.
• 🔹 Synchronization of data (steps, pulse, notifications).
• 🔹 Updates to the firmware through official software.
• 🔹 Search for the device in the settings of the smartphone (if the bracelet was previously paired).

If the Mi Band 4 doesn’t appear on the list of available devices, the reasons may be as follows:

• 📱 Bluetooth is turned off on a smartphone or works in energy saving mode.
• 🔋 Bracelet discharged (less than 10% of the charge is blocked by the communication module).
• 🔄 Outdated firmware bracelet or application.
• 🚫 Conflict with other devices (e.g. headphones or smartwatches).

Preparation for connection: check the smartphone and bracelet

Before you try to turn Bluetooth on on the Mi Band 4, make sure your smartphone meets the minimum requirements:

If your phone meets the requirements, follow the following steps:

1. Turn on Bluetooth on your smartphone: go to Settings → Connections → Bluetooth (the path may vary depending on the model).
2. Make sure the bracelet is charged. Connect it to charge for 10-15 minutes if the indicator shows a low charge.
3. Reboot the Mi Band 4. To do this, press and hold the touch button of the bracelet for 10-15 seconds until vibration appears.
4. Update the Mi Fit or Zepp Life app to the latest version via Google Play or the App Store.

💡

If the bracelet doesn't respond to pressing, try to clear the charging contacts from dry cotton swab contaminants, often solving the dead screen problem.

Step-by-step: how to turn Bluetooth on Xiaomi Mi Band 4

The process of activating Bluetooth is to pair the bracelet with the smartphone, and here is the exact sequence of steps for a successful connection:

Charge the bracelet to 50% or higher

Turn on Bluetooth on your smartphone

Install/update the Mi Fit or Zepp Life app

Reset the bracelet (hold the 10 sec button)

-->

Method 1: via the Mi Fit application (official method)

This method is suitable for most users. Follow the instructions:

1. Open the Mi Fit app and sign in to your Xiaomi account (or sign up).
2. Click on the Profile icon → Add the device.
3. Choose from the list of Mi Smart Band 4.
4. Press Connect and wait for the app to find the bracelet. It can take up to 30 seconds.
5. When the Mi Band 4 appears on the list, click on it. The bracelet vibrates - confirm the connection by tapping on its screen.
6. Wait for the synchronization to be completed (progress is displayed in the app).

If the bracelet is not present, try:

• 🔄 Turn off/on Bluetooth on your phone.
• 📱 Re-launch the Mi Fit app.
• 🔋 Charge the bracelet to 100% and try again.

Method 2: via the Zepp Life app (formerly Amazfit)

Zepp Life is an alternative application for managing Xiaomi and Amazfit bracelets. The interface here is more modern, and synchronization sometimes works more stable.

1. Download Zepp Life from Google Play or App Store.
2. Sign up or sign in through your Xiaomi account.
3. Click Add Add the device → Mi Band 4.
4. Follow the hints on the screen. The bracelet should vibrate when connected successfully.

💡

When you first connect through Zepp Life, the bracelet may request a firmware update. Don't interrupt the process, which can cause Bluetooth to malfunction.

Method 3: Manual connection via smartphone settings

If apps don’t find the bracelet, try connecting manually:

1. Turn on Bluetooth on your phone.
2. Go to Settings → Bluetooth.
3. Click Device Search.
4. In the list, find a device with a name MI Band 4_XXXX (where XXXX — unique identifier).
5. Click on it and confirm the pairing.
6. Open Mi Fit or Zepp Life – the bracelet must be automatically determined.

⚠️ Note: If the bracelet connects through your phone’s settings but doesn’t sync with the app, remove it from the list of associated devices and repeat the process via Mi Fit.

What if Bluetooth on Mi Band 4 doesn’t work?

If you have completed all the steps but Bluetooth is still not activated, check the following points:

Problem 1: The bracelet is not determined by the smartphone

• 📲 Reboot your smartphone – sometimes resetting network settings helps.
• 🔌 Check the bracelet's charge. At a level below 5%, the module. BLE shut down.
• 🔄 Reset your bracelet settings: Go to Mi Fit → Profile → Mi Band 4 → Turn off the device. Hold the button on the bracelet for 10 seconds to reset. Repeat the connection process.

Problem 2: Permanent connection breaks

If the Mi Band 4 is connected, but after a few minutes it is turned off:

• 📵 Turn off power saving mode for the Mi Fit app in your phone settings.
• 📱 Add Mi Fit to battery optimization exceptions (on Xiaomi: Settings) → Battery → Optimizing the battery → All applications → Mi Fit → Not optimize).

Problem 3: Conflict with other devices

If you have other gadgets connected (earphones, watches, speakers), they can interfere with the stable operation of the Mi Band 4.

• 🎧 Disconnect unnecessary devices from Bluetooth.
• 🔗 Forget all previously coupled devices in your phone settings and connect only the bracelet.
• 📱 Check if the antivirus is blocking the connection (for example, Avast or Kaspersky sometimes block the connection). BLE).

How to optimize Bluetooth for battery savings?

The Bluetooth Low Energy (BLE) module in the Mi Band 4 consumes minimal energy, but if set up incorrectly, it can discharge the bracelet faster.

• ⚡ Turn off unnecessary notifications. Go to Mi Fit → Notifications and leave only important (calls, SMS).
• 🔄 Reduce the synchronization frequency. By default, the data is updated every 30 minutes - set the interval to 1-2 hours.
• 📴 Turn off Bluetooth on your phone when you are not using the bracelet (for example, at night).
• 🔋 Watch the charge level. If the bracelet is down to 0%, the firmware may be lost. BLE-The module will stop working properly.

Also worth paying attention to the background processes on the smartphone: some applications (for example, fitness trackers from other manufacturers) can conflict with Mi Fit and consume additional energy.

⚠️ Warning: If the bracelet becomes less synced after optimization, check if you have added Mi Fit to the list of "sleeping" applications. → Battery → Optimizing the battery.

Alternative ways to connect Mi Band 4 without Bluetooth

In rare cases, the Bluetooth bracelet module may fail (for example, after falling or getting moisture).If no methods help, try:

Method 1: Connect via NFC (payment only)

The Mi Band 4 in the NFC version supports contactless payments, but it won't replace Bluetooth for data synchronization.

• 💳 Link a bank card through Mi Fit.
• 📱 Use the bracelet to unlock the smartphone (if previously configured the function of Smart Unlock).

Method 2: Using Third-Party Applications

There are alternative programs to work with Mi Band 4, for example:

• Notify & Fitness (for Android) – allows you to configure notifications without an official app.
• Mi Band Master - Advanced bracelet settings.