Instructions for turning Bluetooth on Xiaomi Mi Band 4

Many fitness trackers are struggling to understand how wireless works in their gadgets. Xiaomi Mi Band 4 is a popular device that doesn't have a physical Bluetooth button as you know it. Unlike smartphones, where you can manually activate a communication module, it's all about software logic and interaction with a mobile app. Understanding this principle is critical to successful configuration.

It's worth noting that the Mi Band 4 doesn't allow the user to control the status of the Bluetooth module directly through the menu of the bracelet itself. The device only goes into detection mode under certain firmware conditions. This usually happens at the time of initial activation or after resetting to factory settings. If your tracker has already been tied to the phone, it runs in the background, waiting for a signal from the smartphone.

The main task of the owner is to ensure that the smartphone-bracelet bundle works correctly. This requires that the phone has the appropriate geolocation services and Bluetooth activated. Often the problems arise precisely because the Android or iOS operating system blocks the search for peripherals in order to save energy. In this article, we will discuss all the nuances of setting up and forcing the communication module to start.

The principle of operation of the wireless module in the Mi Band 4

The Bluetooth Low Energy (BLE) technology used in Xiaomi’s fourth-generation trackers is a stark contrast to the classic Bluetooth we know from headphones. The main feature is the constant search for balance between energy saving and connectivity stability. The bracelet is in sleep mode most of the time, waking up only to transmit data packets or receive notifications, which is why you won’t see a switch in the device’s interface.

Visibility mode activation occurs automatically when the tracker detects that it is not connected to any device, or when the user performs a reset. At this point, the LED indicator begins to pulse, signaling readiness to pair, and if the bracelet "mortarized" the previous phone, it will ignore the connection requests from new gadgets until the connection is broken programmatically.

⚠️ Warning: Attempts to find the bracelet through the standard Bluetooth menu of phone settings without using the Mi Fit or Zepp Life app are doomed to failure.

It is important to understand that the stability of the work depends not only on the tracker itself, but also on the version of the smartphone operating system. Older versions of Android can incorrectly process BLE packets, which leads to permanent connection breaks, in which case the system can forcefully turn off the background search of devices, considering it an extra load on the phone’s battery.

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The Mi Band 4 does not have a manual Bluetooth switch; the module is activated automatically when no tether is attached or after resetting.

Preparing the smartphone for the first connection

Before you try to turn on the visibility of the tracker, you need to set the smartphone itself up correctly, which is the foundation without which further action does not make sense. Many users miss this step, relying on automatic system settings, which often leads to errors, you will need to make sure that all the necessary permissions are provided in advance.

First of all, go to your mobile device’s Bluetooth settings and make sure the switch is in the “On” position. Even if you plan to use the application, the system module should be active. Also, on modern versions of Android (starting at 6.0 and up), Bluetooth scanners must have geolocation enabled for operation. Without this permission, the application simply will not be able to “see” the signal from the bracelet.

The official app is now available for download. Zepp Life (formerly Mi Fit) and Mi Fitness. The choice of app depends on the region of use and personal preferences, but for Mi Band 4, the classic option is Zepp Life. After installation, take your time to open the program - first check the list of installed applications for conflicts.

• 📱 Make sure that your phone doesn’t run other bracelet management apps (like Notify for Mi Band) as they can intercept the connection.
• 📍 Turn it on. GPS/Geolocate in the notification curtain and give permission to access the location for the Zepp Life app.
• 🔋 Turn off the power saving mode on the smartphone so that the system does not “kill” the process of searching for devices in the background.
• 📶 Make sure you have a stable internet connection, as the app will download the necessary device profiles when you first start up.

Only after completing these preparatory steps can you move on to directly interact with the tracker. Ignoring geolocation requirements is the most common reason why the Xiaomi Mi Band 4 is not included in search mode.

Step-by-step instruction: activation and pairing

The process of turning Bluetooth on to the Mi Band 4 is actually the process of first logging in. If the device is new, it's already in standby mode. If the bracelet has been in use, it needs to be reset beforehand. Let's look at the algorithm for both.

For a new device, just put the tracker next to your smartphone. Open the Zepp Life app, log in to your account and go to profile. Click on Add Device and select Bracelet. The app will start the scan. At that point, a vibration or Bluetooth symbol may appear on the tracker screen to confirm that the detection mode is activated.

If the bracelet has been used before, it may not show up in the search, in which case a forced reset will be required. On the tracker itself, swipe to the "Additional" menu (three-dot icon or gear icon), find the item "Reset» (Unbind/Reset) And you can confirm the action. The screen goes out, and in a few seconds, the device goes back into mode.

In rare cases where standard menu reset is not possible (e.g., the interface freezes), you can use the charging method. Connect the tracker to the charger. When connected to the power source, the Mi Band 4 often automatically restarts the Bluetooth module and becomes searchable for a short period of time.

⚠️ Warning: Do not attempt to pair the bracelet through the phone's Bluetooth system settings.This will cause a connection error, after which the Zepp Life app may stop seeing the device until the Bluetooth cache is completely cleared.

Solving the visibility problems of the device

Even if you follow all the instructions, you can have situations where your smartphone stubbornly doesn't see the tracker, a common problem with caching old connection data. The phone's operating system can "remember" the device as already connected but with erroneous parameters, blocking a new connection attempt.

The first step in this situation should be to clean the list of conjugate devices. Go to your smartphone's Bluetooth settings, search the Mi Band 4 list (or similar name), and click "Forget" or "Unpair." If the device is displayed multiple times, delete all copies. After that, be sure to restart the smartphone - this is a critical step for resetting the Bluetooth stack.

If the reboot didn’t work, try clearing the data from the Zepp Life app itself. Go to your phone’s settings → Apps → Zepp Life → Memory → Clear the data. Don’t worry, your health data is stored in the cloud of your Xiaomi account and won’t go away. Once the data is cleaned, log in again to the app and try to run a search.

For successful activation of the Bluetooth module and the initial (handshake) it is recommended to hold the bracelet close to the smartphone, at a distance of no more than 10-15 centimeters. The presence of metal objects or powerful sources of interference between devices can break the signal at the stage of establishing a connection.

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If nothing helps, try connecting the bracelet to another smartphone. If it's there instantly, the problem is exactly with your main phone settings.

Permit settings and background work

After successfully enabling Bluetooth and initial pairing, it is important to properly configure permissions so that communication does not break down.Modern Android shells (MIUI, OneUI, ColorOS) aggressively control background processes, which can lead to the fact that the Mi Band 4 will constantly lose touch with the phone.

You need to go to the Zepp Life settings and set the autorun and background settings in Unlimited mode. In MIUI, this is done via the Battery menu → Applications → Zepp Life → Autostart and Charge Saving (select No Limits) menu. Similar actions need to be repeated for Bluetooth and Geolocation system services.

Special attention should be paid to notifications. In order for the bracelet to receive data about incoming calls and messages, it needs a constant communication channel. If the system “sleeps” the application, the channel will break, and the bracelet will stop vibrating when you call. Check that the list of permissions of the application is marked with items: “Notifications”, “Physical activity”, “Phone” and “Contacts”.

• 🔔 Enable notifications in the Zepp Life app itself in the Profile section» → «Notification of the annexes».
• 🔒 Lock the application in the list of recent tasks (usually you need to pull the application window down or press the lock) so that the system does not close it when cleaning the memory.
• 📶 Make sure the phone doesn’t have Do Not Disturb or Sleep modes on, which can block data transfer to the periphery.

⚠️ Note: On iPhone (iOS), the background situation is stricter. Do not remove the Zepp Life app from the list of running (do not swipe up to close), otherwise data synchronization and push notifications will not work.

Resetting and reconnecting

Sometimes the software failure is so deep that conventional methods do not help to wake up the Bluetooth module, in which case the radical but effective method remains – a complete reset.

You can reset through the menu of the bracelet itself: swipe to System or Additional, select Reset and confirm. The tracker vibrates and reboots. Once turned on, it will search for the phone as it was the first time. If you can't log in, you can use Unbind in the Zepp Life app before removing the device from the list.

Once reset, re-do the search procedure through the app, and the app will prompt you to do it automatically, and you can't interrupt this process, because it can turn the tracker into a brick.

Bluetooth's stability is key to getting the statistics right, so if you notice that your steps are out of sync or your pulse is being recorded with breaks, repeat the detachment and binding procedure again, and it refreshes the encryption keys between your phone and tracker.

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Completely resetting the bracelet settings and clearing the Bluetooth cache on the phone solve 90% of the device’s invisibility problems.

Frequently Asked Questions (FAQ)