Turning on and setting up Bluetooth on the Xiaomi Mi Band 4 fitness bracelet is a fundamental step to getting started with this popular wearable. Many users mistakenly believe that there is a separate button or switch on the tracker itself to activate the wireless module, but the Mi Band 4 architecture is different. The device is in standby mode and ready to pair immediately after being removed from the package or after full discharge and subsequent charging.
For successful synchronization of health, pulse and steps, it is critical to properly configure the interaction between the wristband and smartphone.The process does not require complex manipulation of system files, but requires strict adherence to the sequence of actions in the official application. If you just purchased a gadget or faced with loss of connection, this article will help you restore stable communication and enjoy all the functions of the tracker.
The biggest challenge is often not the lack of functionality, but the nuances of Android and iOS operating systems that can block device search. Understanding how the Mi Band 4 interacts with data protocols will avoid typical errors. Next, we will take a detailed look at each step, from preparing a smartphone to fixing specific connection errors.
The principles of the Bluetooth module in Mi Band 4
The Mi Band series fitness trackers, including the fourth generation, use Bluetooth Low Energy (BLE), also known as Bluetooth Smart. It is an energy-efficient protocol designed specifically for wearable electronics, where the priority is long-term operation on a single battery charge. Unlike classic Bluetooth, which is used to transfer audio files or large amounts of data, BLE consumes minimal amount of power while being in sleep most of the time.
It's important to understand that the Mi Band 4 doesn't have its own interface to control whether a user switches on or off the radio. The device always "listens" to the airwaves for an authorized smartphone, but it only starts to actively transmit data when an application is requested or when certain events occur, such as the completion of a workout, which is why you won't find "Bluetooth" on the wristband menu itself.
- 📡 Protocol BLE Provides the device for up to 20 days without recharging.
- 🔒 The communication is protected by a unique encryption key tied to a specific account.
- ⚡ Activation of the module occurs automatically at the first contact with the charged device.
The range of the signal is about 10 meters in line of sight, but walls and other electronic devices can significantly reduce the quality of the connection. If the smartphone and the bracelet are in different pockets or bags, the signal may weaken, leading to synchronization breaks.
⚠️ Note: If you’re trying to turn on Bluetooth through the phone’s settings, but the bracelet doesn’t appear in the list of available devices, that’s fine. Mi Band 4 cannot be connected directly through the standard Bluetooth menu of the operating system, it is required to use an intermediary application.
Preparation of the smartphone and installation of the Mi Fit application
The first and most important step is to prepare the software on your mobile device. The Xiaomi Mi Band 4 uses the Mi Fit app (renamed Zepp Life in some regions) to manage it. Without this software, the bracelet is simply a screen with a clock that can’t store activity history or display notifications.
Download the application should be exclusively from official sources: Google Play Market for Android or App Store for iOS. APK-Files from third-party resources can lead to unstable work, the absence of critical firmware updates and even locking the account.
Once logged in, the app will request permission to use geolocation and Bluetooth. These requests cannot be ignored, since modern versions of Android (starting with 6.0) do not allow access to the Bluetooth scanner without the enabled Bluetooth scanner. GPS-This is a systemic security limitation that often causes problems for beginners.
- 📱 Make sure that Android is at least 5.0 or iOS is at least 10.0.
- 🌐 Check the stability of the Internet connection to register an account.
- 🔋 Charge the bracelet to at least 20% before setting up.
It’s also worth checking if your phone is running a “Saving Energy” mode at the time of setting up. Aggressive energy saving algorithms can block the background work of the Mi Fit app, which will lead to permanent breaks in communication with the tracker. Ideally, during the initial setup, all restrictions for the application should be removed.
Step-by-step instructions for the first connection
The Mi Band 4 primary pairing process is different from connecting conventional wireless headphones or speakers, using an application interface binding method that automatically initiates device search and security key exchange, starting with the application running and Bluetooth on the smartphone.
Open the Mi Fit app and go to the Profile tab. At the top of the screen, click Add Device and select Bracelet category. The system will suggest selecting a model from the list — find and click on Mi Band 4.
☑️ Checklist before connection
When you see an image of your bracelet with its ID on your smartphone screen, tap it to start pairing. The tracker screen will display a vibration signal and a request for confirmation of communication (phone icon). Tap the touch button on the bracelet to confirm the action. If there is no vibration, try putting the bracelet on charge for a couple of minutes.
| Phase | User action | Device response |
|---|---|---|
| 1. Search. | Press "Add" in the annex | Bluetooth indicator flashes (invisible) |
| 2. Detection | Selecting the ID bracelet in the list | Vibrosing on the wrist |
| 3. Confirmation | Pressing the bracelet screen | The appearance of the Mi logo and vibration |
| 4. Synchronization | Waiting for completion | Updating the dial, setting the time |
After successful confirmation, the phone will display a message about the successful connection. From now on, the Mi Band 4 automatically synchronizes the time and date, and also starts downloading the necessary dial files.
⚠️ Note: If during pairing the application requires updating the firmware of the bracelet, be sure to agree. Interrupting the firmware update can lead to complete inoperability of the device (brick), which will have to be carried to the service center. Do not put your phone down and hold the bracelet next to your phone until the process is complete.
Setup of permits and background work
Even after a successful connection, users often find themselves in a situation where notifications stop coming and steps don’t sync, and the reason lies in the settings of the operating system, which kills the background processes of the Mi Fit application to save charge. To avoid this, you need to manually configure permissions.
First, go to your smartphone’s Bluetooth settings, look up the Mi Band 4 connected devices (or a few entries with similar names) and make sure that the boxes are ticked against “Sound”, “Contacts” and “Data Sharing”, but the main work is done inside the settings of the phone itself.
Android’s Hidden Settings for Stability
Next, you need to prevent the system from closing the application. Find the Battery or Applications section in the phone settings, select Mi Fit and set the "No Limits" or "Start Automatic" mode. On Xiaomi phones (MIUI), this is a critical step, since the shell is very aggressively cleans the memory.
- 🔓 Unblock notification access for all the right messengers within the app.
- 🔄 Enable auto-start for the application in the system settings.
- 📍 Activate permanent access to geo-location for accurate route tracking.
It is also recommended to fix the application in the phone’s memory. To do this, open the list of running applications, find the Mi Fit window, pinch it or pull it down (depending on the phone model), and press the lock icon. This will prevent the program from accidentally closing when cleaning the RAM.
Solving Typical Connection Problems
Despite the simplicity of the procedure, there are sometimes technical difficulties.If the Mi Band 4 is not turned on or visible to the phone, first check the battery charge. A fully discharged lithium polymer battery may not respond to the connection to the charger instantly - leave it on charge for 15-20 minutes.
A common problem is the "junk" on the Bluetooth device list, and if you've tried to plug in the bracelet before and the process has broken, there may be erroneous entries in the system. Go to your phone's Bluetooth settings, find any entries containing "Mi Band" or "Miband," and click "Forget the device" or "Park." After that, restart the phone.
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Useful tip: If the bracelet has stopped responding to touch and does not turn on when connecting to charging, try using another charging capsule or USB-Sometimes the problem is the oxidized contacts on the bracelet itself -- wipe them with a dry soft cloth.
In some cases, a full reset to factory settings helps. On the tracker itself, go to the More → Settings → Reset (or Unbind) menu. If the menu is not available, you can use the Reset feature in the Mi Fit app itself after trying to connect again, even unsuccessfully.
If nothing helps, it may be a hardware conflict between the phone's Bluetooth module: try connecting the bracelet to another smartphone. If the other device is working, the problem is the settings or hardware of your main phone. If there's silence there, the tracker itself is probably faulty.
⚠️ Warning: Don't try to connect Mi Band 4 to two phones at once.The device only supports one active profile.To change the phone, you must first break the connection in the application on the old device.
Advanced settings and notification management
Once Bluetooth is successfully activated and the communication is stable, you should configure notification filtering. Mi Band 4 can display text messages, calls and notifications from social networks, but by default this functionality may be limited. In the application, go to the Profile → Mi Band 4 → Application settings.
You can choose which apps will duplicate your wrist notifications. Activate switches for WhatsApp, Telegram, Viber and other messengers; you can also configure weather, alarm clocks and calendar events; you can allow the app to access its current location to work.
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The stability of the Mi Band 4 is 90% dependent on the right energy saving settings in the smartphone, not the bracelet itself.
Special attention should be paid to the function "Raising the wrist to turn on the screen." It uses an accelerometer bracelet and does not require a constant active Bluetooth connection for each movement, but for initial calibration and data reset communication is necessary. You can adjust the sensitivity of this function or time intervals when the screen should not light up (for example, at night).
- 🌙 Set up Do Not Disturb mode to automatically turn off the screen at night.
- ⌚ Choose your preferred dial from the huge library in the store.
- 📳 Set the alarm clock vibration and goals in steps for motivation.
Regular data synchronization happens automatically when you open the application, but you can manually run it by pulling the main screen down. This is especially useful if you have been out of Bluetooth for a long time and the training data has accumulated in the tracker's memory. Mi Band 4 has about 7-10 days of detailed activity without synchronization.