Modern users are often faced with the need to integrate wearable electronics into their ecosystem, and owners of Redmi Note 9S series smartphones (often popularly called M4 due to similar characteristics or confusion with the model range) are no exception. The process of pairing a fitness tracker with a MIUI-based device may seem simple, but the specific settings of the Xiaomi shell often become a barrier to the stable operation of the gadget. An incorrect sequence of actions or ignoring Android system restrictions leads to the fact that the bracelet constantly loses connection or does not receive notifications.
In this guide, we will analyze the connection algorithm in detail, taking into account the peculiarities of how background processes work in MIUI. You will learn how to properly configure Bluetooth connection, select the appropriate application and configure permissions so that the device works correctly throughout the day without interruptions.
Preliminary preparation of the device and accessories
Before starting the synchronization procedure, you must make sure that both devices are fully ready for interaction. Often the problem lies not in a software glitch, but in a simple discharge of the tracker’s battery or the enabled flight mode on the smartphone. Charge smart bracelet to a level of at least 50%, since the process of initial setup and firmware update consumes a significant amount of energy.
On your smartphone Xiaomi Redmi Note 9S you must activate the wireless communication module. Go to Settings → Bluetooth and make sure that the switch is in the active position. The system will begin scanning available devices, but at this stage there is no need to connect to the bracelet through the system menu - this may cause a conflict during subsequent setup through the proprietary application.
It is also recommended to restart the phone before starting the procedure. This will clear the Bluetooth stack cache and resolve any possible service hangups that may have occurred after previous failed pairing attempts. Rebooting is a simple but effective step to reset network settings.
Before connecting, make sure that the bracelet does not have Do Not Disturb mode or screen lock enabled, if the model has such a function.
Selecting and installing the right synchronization application
The key element of successful integration is the choice of software. Different tracker manufacturers use different platforms for data management. The most common are Zepp Life (formerly Mi Fit), Huawei Health or Galaxy Wearable. For devices compatible with the Xiaomi ecosystem, Zepp Life is often the best choice.
Download the application exclusively from the official store Google Play Market or Mi GetApps. Using third-party APK files may result in the installation of malware or incorrect operation of the synchronization service. After installation, launch the app and create an account using your email or phone number.
- 📱 Zepp Life —a universal solution for most budget Xiaomi and Mi Band trackers.
- ⌚ Huawei Health —necessary for Honor and Huawei devices, requires installation via AppGallery.
- 🔗 Notify for Mi Band —an advanced utility for deep customization of notifications.
When launched for the first time, the application will ask for a number of permissions to access geolocation, contacts and phone. Critical important Grant all requested rights, especially location access, since Android's scanning of Bluetooth devices is technically tied to the geolocation service. Without this item, the search for the device will not begin.
Search and pairing process devices
After logging into the application, go to the user profile, usually indicated by a person icon in the lower right corner. Select item Add device or Profile → Add. In the list of available categories, find the type of your gadget, for example, “Bracelet” or “Watch”.
Now you need to activate the pairing mode on the tracker itself. On some models this happens automatically when charging, on others you need to hold down the touch button or select “Pairing” in the device menu. Keep the bracelet as close to the smartphone as possible, preferably at a distance of no more than 10-15 centimeters.
When the application detects the device, the model name and a request to confirm pairing will appear on the phone screen. At the same time, a vibration signal and a graphic confirmation symbol (checkmark or button) should appear on the screen fitness bracelet . Press confirmation on both devices at the same time.
⚠️ Attention: If the phone already “sees” the bracelet as a paired device in the Bluetooth system menu, remove it from the list before starting setup in the application. Double pairing (through Android settings and through the app) will result in a data synchronization error.
☑️ Check before pairing
Setting permissions in the MIUI system for stable operation
The MIUI shell installed on the Redmi Note 9S is known for its aggressive energy saving policy. The system aims to kill any background processes that it deems to be draining your battery, including the bracelet's sync services. To avoid constant disconnections, you must manually configure autostart and access rights.
Go to Settings → Applications → All applications and find the installed application for the bracelet in the list (for example, Zepp Life). Go to section Other permissions. Here you need to enable all the items, especially those related to displaying on top of other windows, working in the background and accessing notifications.
Pay special attention to the battery settings. In the application menu, select Battery saving and set the value No restrictions. This will prevent the system from forcing the sync process to stop when the phone screen is turned off. Without this setting, notifications about calls and messages may arrive with a long delay or not arrive at all.
| Setting parameter | Recommended value | Influence on work |
|---|---|---|
| Autostart | Enabled | The application starts immediately after turning on the phone |
| Background activity | Allowed | Synchronizing data without opening applications |
| Display on top of windows | Allowed | Correct display of pop-up notifications |
| Battery saving | No restrictions | Prevents Bluetooth scanning service from being closed |
Ignoring these steps is the most common reason for user complaints about the “bugs” of bracelets. The Android system itself limits background activity, and MIUI does it doubly effectively, so manual configuration is mandatory.
Why does MIUI close applications?
HyperOS and MIUI algorithms analyze resource consumption in real time. If an application does not have explicit permission to run in the background, it is marked as "sleeping" and its processes are frozen to save power, which breaks the BLE connection.
Solving common connection and synchronization problems
Even if all instructions are followed, technical collisions may occur. One of the common problems is the situation when the application sees the bracelet, clicks “Connect”, but the process freezes at 99% or gives a timeout error. In this case, try clearing the application and Bluetooth data cache.
To do this, go to Settings → Applications → All applications → Bluetooth (if the item is hidden, turn on displaying system processes in the menu) and press Clear → Clear cache. Then follow the same steps for the bracelet control app itself. After that, restart your smartphone.
If the problem persists, the firmware version may conflict. Try performing a full reset of the bracelet to factory settings through the menu of the device itself or by holding the button. Then delete the application, download it again and repeat the pairing procedure from the very beginning, ignoring the old account data.
⚠️ Attention: Resetting the bracelet will delete all accumulated training and sleep data that was not synchronized with the server. Make sure that important information is saved before performing a Hard Reset.
In rare cases, the problem lies in an outdated version of Android or a conflict with other applications that use Bluetooth (for example, headphones or car systems). Try turning off other devices while setting up the tracker.
Optimization of operation and updating the firmware
After successful connection, the system will offer to update the bracelet firmware. Never interrupt the update process and keep the devices close to each other with a friend until the installation is complete. Interrupting the firmware recording can turn the device into a “brick”, the restoration of which is only possible in a service center.
To extend battery life, adjust the heart rate measurement frequency. _continuous_ monitoring consumes more energy than periodic measurements every 10-30 minutes. Also disable wrist lift to turn on the screen if this feature is not triggering correctly when you gesture.
Check regularly for updates to the control app itself. Developers often release patches that improve compatibility with new versions of Android and correct data transfer errors. The stable operation of the bundle smartphone-bracelet depends on the relevance of the software at both ends of the connection.
The stability of the bracelet is 90% dependent on the correct setting of autorun permissions and battery saving in MIUI, and not on the quality of the bracelet itself Bluetooth module.
Why does the bracelet not see the phone when searching?
Most often the problem is that geolocation is turned off. In Android 6.0 and higher, scanning Bluetooth devices is not possible without the GPS module enabled. Also check if the device is hidden in the Bluetooth privacy settings.
Can you connect the bracelet to two phones at the same time?
No, most budget and mid-budget trackers only support connection with one active device. When you try to connect to a second phone, the connection with the first one will be disconnected automatically.
What to do if notifications do not arrive on the bracelet?
Check the notification settings inside the application (check the boxes next to the required apps) and make sure that in the Android system the application is allowed access to notifications. Also turn off Do Not Disturb mode on the bracelet itself.
How to reset Bluetooth settings on Redmi Note 9S?
Go to Settings → About phone → MIUI version (press quickly 7 times to enable developer mode). Then in Advanced settings → For developers, find the item "Reset Wi-Fi, mobile data and Bluetooth settings."
Does the case on the phone affect the connection with the bracelet?
Metallic or very thick protective cases can shield the Bluetooth signal, reducing the range and stability of the connection. If constant tears are observed, try removing the case to check.