Turning on and configuring a wireless module on wearable electronics often raises questions among new owners, especially when it comes to popular models like Xiaomi Mi Band 4. It is important to understand the fundamental feature of the architecture of this gadget: the tracker does not have its own interface for manually turning on or off Bluetooth in the classic sense, as it is implemented on smartphones or tablets.
The communication module in the fitness bracelet operates in a constant standby mode, broadcasting a signal to search for a paired device. Activation occurs automatically when the device is first turned on or after resetting, requiring only confirmation of pairing on the smartphone screen through the official application. The user does not need to search for hidden menus on the display of the bracelet itself, since communication management is fully delegated to the mobile software.
It's critical to synchronizing successfully, and it's critical to have the right version of the operating system on your phone. Unlike simple headphones, it uses the BLE protocol, which provides minimal power consumption but requires a specific approach to (pairing). If you've just unpacked the device, it's ready to go, and your job is to get it right through your smartphone.
Bluetooth in the Mi Band 4
Xiaomi’s fourth-generation wireless tracker technology is based on Bluetooth 5.0, which provides significantly higher data transfer speeds and longer ranges than its predecessors. The main difference from classic Bluetooth is to optimize energy consumption: the module spends most of the time in “sleep” mode, waking up only to transmit pulse data packets, steps or notifications. Which is why you won’t find an On/Off switch on the wristband menu itself – the system is designed to be always ready to connect, but not waste battery power.
The pairing process is initiated exclusively by the mobile device. When you open the Mi Fit (or Zepp Life) application and press the add-on button, the smartphone begins to scan the air for signals from the trackers. At this point, the Mi Band 4 must be in an active state (the screen burns or responds to touch) so that its ID is detected. Once detected, encryption keys are exchanged, and the devices “meet” by creating a secure communication channel.
⚠️ Attention: Attempts to find the Bluetooth enabled function in the menu of the bracelet itself (Settings -> Bluetooth) is meaningless because it only displays the status of the current connection or MAC-address, but not control of the radio module.
Connection stability depends on the firmware version and the distance between the devices. In urban environments, the signal may weaken, so for the initial setup, it is recommended to be in close proximity to the phone. It is also worth considering that connecting to several smartphones simultaneously is impossible without special junction manipulations, which will be discussed below.
Preparing a smartphone for pairing
Before you try to connect to a tracker, you need to make sure that your smartphone is configured correctly. Often the problems arise not because of a malfunction of the gadget, but because of the lack of permissions in the operating system. For Android and iOS, the requirements may differ, but the basic principle is the same: the application must have full access to wireless functions.
First of all, check if the Bluetooth module itself is activated in the phone system. This seems obvious, but in a hurry, users often forget to turn this feature on the notification curtain (GPS) Included – this is a mandatory requirement of Android to work with BLE-devices, because MAC-addresses can be used to determine the location.
- 📱 Make sure that Android is at least 5.0 or iOS is at least 10.0, otherwise Mi Fit compatibility is not guaranteed.
- 🔋 Charge the bracelet to minimum. 20-30%, Because at low charge levels, the system can limit the radio module to save energy.
- 📡 Enable geolocation and give the application permission to access the location in the privacy settings.
You should pay special attention to the list of previously paired devices. If you tried to connect the bracelet before and the process failed, the phone could have a "junk" profile in its memory. Go to the Bluetooth settings of your smartphone, search the Mi Band 4 list (or similar name), and click "Forget the device" or "Sever the pair." This will clear the cache of links and allow you to start the process again.
It is also recommended to restart the smartphone before the procedure.This action resets Bluetooth services in the operating system, eliminating possible driver freezes that may have occurred in the background after a long phone operation without turning off.
Step-by-step activation instructions via Mi Fit
The main tool for managing the bracelet is the Mi Fit application (renamed Zepp Life in some regions), which is the software interface that allows the connection to be “enabled”, the process is as follows: after installing and registering an account, you need to go to the Profile tab and select the Add Device item.
In the list that opens, select the category "Bracelet" and find the Mi Band 4. The app will go into search mode. At this point, take the bracelet in your hands, tap the touch button to wake the screen. The tracker display may show a vibration or icon indicating the search. Once the phone detects the device, an image of the bracelet and the "Connect" button will appear on the smartphone screen.
☑️ Checklist of successful connection
The critical point is the confirmation on the tracker itself. When you press the connection button on the phone, the Mi Band 4 will have a request with the smartphone icon and vibration, you need to touch the touch area on the bracelet (the tick icon or just tap on the screen) to confirm the pairing, and without this physical action, the connection will not be established for security reasons.
Once paired successfully, the app will automatically request permission to access notifications, contacts and background work. Allow all the rights requested, otherwise the bracelet will not be able to display incoming calls or messages from messengers. If you skip this step, Bluetooth will only work for step synchronization, but the functionality of smart notifications will remain unavailable.
Configure access rights and permissions
Modern versions of operating systems (especially Android 10, 11, 12 and later) aggressively control background processes to save battery, which often leads to a break in communication with the tracker. For the Xiaomi Mi Band 4 to work consistently, you need to manually adjust the energy saving settings for the Mi Fit application.
Go to your phone settings, find the "Applications" or "Application Manager" section, select Mi Fit. You will need to find "Battery" or "Energy Saving" and select "No Limits" or "No Power Saving" mode, which will prevent the system from "killing" the application process when the phone screen is turned off, which will provide a permanent communication channel via Bluetooth.
Also, check the permissions in the "Additional Permissions" section. The "Autostart", "Background Launch" and "Mastering on top of other applications" sections should be activated. The absence of any of these options can cause the bracelet to periodically lose touch and you will have to "turn on" it again through the application.
⚠️ Note: On smartphones Xiaomi, Huawei and Honor often need to additionally fix the application Mi Fit in memory (lock in the menu of running applications), so that the system does not clean it if there is a shortage of RAM.
For iOS users, the situation is a little easier, since the system itself manages background processes, but it is important not to turn off background content updates for the application. Also make sure that the Bluetooth settings in the "Mi Band" section include the "Share System Settings" and "Sound" switches if you want to synchronize time and audio settings.
Solving Device Detection Problems
The situation where the smartphone just doesn't see the bracelet is one of the most common. Before you panic, check the basic things: is the tracker charged, is it too far away, is Bluetooth on. If all the basic conditions are met, but the search does not give results, maybe the bracelet "hang" in a state of error.
The first thing to do is to reset the tracker. Since there is no power button, use the menu on the screen: swipe left to Settings (the gear icon), then select System (or similar) and find the reboot icon (circular arrow). If the menu does not respond, you can put the bracelet on charging - connecting to the USB-The cable is often caused by an automatic device reset.
If the reboot didn’t help, it’s possible that the bracelet was previously linked to another Mi Account. In this case, the lock or phone icon may be on the screen. You’ll need to untie the device through the app where it was registered earlier, or perform a full reset (see FAQ section). Also make sure there are no other active Xiaomi devices nearby that can intercept the signal at the time of searching.
| Problem. | Probable cause | Method of decision |
|---|---|---|
| The phone doesn't see the bracelet. | The bracelet is busy or getting stuck | Put on charging or reboot through the menu |
| The pairing error | Conflict on the Bluetooth list | Remove the device from your phone's Bluetooth settings |
| Communication is always breaking. | Aggressive energy savings | Allow auto-start and work in the background for Mi Fit |
| No notifications coming. | Lack of access rights | Enable notifications in the application and system settings |
In rare cases, the problem may be a hardware problem or a deep software failure. If none of the software methods work, you should try connecting the bracelet to another smartphone. If the device is not detected there, the Bluetooth module may have failed and maintenance will be required.
Disabling and resetting Bluetooth settings
Sometimes you have to completely break the connection, for example, when you sell a device or transfer it to another user. You can't just turn off Bluetooth on the bracelet, but you can break a pair or reset. You just need to select your bracelet in the Mi Fit application, scroll down and press Unbind.
Once untie, the bracelet will return to standby mode and be searchable again. If you want to reset all the settings of the tracker itself, including the steps and dial settings, use the Reset feature in the bracelet settings menu. The screen will show a cross icon or the words "Reset". Tap on it will return the device to factory settings.
What happens when you reset your settings?
Therefore, before any radical action, always force the application to open and wait for the data update.
There is no one way to completely shut down Bluetooth for a long time (for example, in an airplane, although this is not required by the rules), the module consumes a negligible amount of power in downtime. However, if you want guaranteed communication, you can turn off Bluetooth on the smartphone itself or discharge the bracelet to zero.
Frequently Asked Questions (FAQ)
Can I connect Mi Band 4 to two phones at the same time?
Why doesn’t the bracelet vibrate when ringing, even though Bluetooth is on?
Does Bluetooth enabled affect the battery drain of the phone?
How to update the firmware if Bluetooth is constantly falling off?
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For maximum accuracy of the pedometer and pulsemeter, wear the bracelet tightly, but not crushing the wrist, and place it 1-2 cm above the bone of the wrist.
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The main secret of stable operation of Mi Band 4 is not finding the power button, but the correct setting of the operating system permissions for the Mi Fit application.
In conclusion, it is worth noting that “enable” Bluetooth on Xiaomi Mi Band 4 is a process of software integration, not mechanical switching. Understanding the logic of the BLE protocol and proper management of permissions in your smartphone will allow you to forget about the connection problems and enjoy all the features of the smart tracker.