Connecting Haylou Smart Watch 2 to Xiaomi smartphone: full instruction with error solutions

The Haylou Smart Watch 2 has become a popular choice among Xiaomi ecosystem users due to its combination of affordable price, stylish design and wide functionality. However, many owners face difficulties when connecting a device to a smartphone for the first time – especially if it is a Xiaomi model with custom firmware or limited resolutions. In this article, we will discuss not only the standard pairing procedure, but also nuances that will help to avoid typical errors.

It’s important to understand that the connection process can vary depending on the MIUI version, phone model, and even regional settings. For example, devices with MIUI Global may need to adjust the permissions for Haylou Fun app, while Chinese versions of the firmware (MIUI China) sometimes have problems accessing notifications. We have taken all these points into account and prepared a universal guide that will suit most scenarios.

Preparation for connection: what to do before pairing

Before you start syncing Haylou Smart Watch 2 with a Xiaomi phone, make sure all the prerequisites are met, which will help avoid crashes during the search stage of the device or connection.

First, check the Bluetooth version on your smartphone. The watch supports Bluetooth 5.0, but will work with older versions (e.g. 4.2), but there may be problems with communication stability. You can find out the version from the Settings menu → About Phone → Full Specification (the path may vary depending on the version of MIUI).

• 📱 Update your smartphone firmware to the latest version MIUI (Especially relevant for Redmi Note models 8/9 and POCO X3, where the Bluetooth bugs were detected).
• 🔋 Charging the clock: make sure the Haylou Smart Watch 2 has a charge level of over 30%.At low charge, the device can shut down during synchronization.
• 📲 Remove old pairings: If the watch has already been connected to another phone, reset it via the Settings menu → Reset on the watch itself.
• 🛡️ Turn it off. VPN Firewalls: Some security applications (e.g. Mi Security) may block connection to wearable devices.

Critical detail: on Xiaomi phones with version MIUI 12.5 and later, you may need to manually enable the "Exact Location" permission for the Haylou Fun app, even if you are not using it. GPS-Without it, the clock will be connected, but it won't be able to synchronize steps or heart rate.

Installation and configuration of the Haylou Fun app

The official Haylou Smart Watch 2 management app is called Haylou Fun (not to be confused with Mi Fit or Zepp, which are designed for other devices), and can be downloaded from Google Play or AppGallery, but for Xiaomi users, there is a nuance: in some regions, the app may not appear in the search.

1. Go to Haylou Fun directly on Google Play.
2. If the link does not open, download the APK from the official Haylou website (check the hash amount of the file for viruses!).
3. Install the file by pre-allowing installation from unknown sources in Settings → Applications → Special Access → Installation of unknown applications.

After installation, start Haylou Fun and follow the following steps:

• 🌐 Select the interface language (Russian supported).
• 📱 Allow all permissions requested: notifications, contacts, location, telephone (for calls).
• 🔄 Click Add Device and select Smart Watch 2 from the list.

Download Haylou Fun from an official source

Turn on Bluetooth on your phone

Make sure the clock is on and charged

Allow all requests of the application

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Important! On Xiaomi phones with MIUI 13/14, you may need to adjust the Settings menu after installing the app → Apps → App Management → Haylou Fun → Additional → Rights.

• Auto-start
• Background work
• Display over other windows

Step-by-step instructions for pairing a clock with a phone

Now, let's go directly to the connection. Follow the instructions carefully, because skipping even one step can cause a failure.

1. Activate Bluetooth on your phone via the notification panel or in Settings → Connections and Sharing → Bluetooth.
2. Turn on the watch with a side button for 3 seconds and the Haylou logo will appear on the screen.
3. Run a device search in the Haylou Fun app (Add Device button).
4. Select Smart Watch 2 from the list of found devices. If the watch is not listed, update your search or reboot Bluetooth on your phone.
5. Confirm pairing on both devices: the clock will be a request for confirmation (click the button), on the phone – a pop-up window with the code.

If you have a “failure to hide the device” error during the connection step, try the following:

• 🔄 Reboot both the watch and the phone.
• 📱 Remove the watch from the list of associated devices in the Bluetooth phone settings.
• 🔧 In the Haylou Fun app, go to Profile → The device → Remove and start the process again.

Setup of notifications and data synchronization

Once the connection is successful, you need to configure notifications and data synchronization, otherwise the watch will only work as a regular pedometer. In the Haylou Fun app, go to the Notifications section and:

• 📩 Enable the Call Notification option (allows you to see incoming calls on your watch).
• 💬 Activate “Notifications from apps” and select messengers (WhatsApp, Telegram, Viber, etc.).
• 🔔 Set up “Vibration” and “Screen” for different types of notifications.

For the correct operation of notifications on Xiaomi also requires:

1. In the phone settings go to Applications → Application Management → Haylou Fun → Notifications and turn on all switches.
2. In the Settings menu → Notifications and Status bar → Notification management find Haylou Fun and allow notifications to be displayed.

Synchronization of data (steps, sleep, pulse) occurs automatically every 30 minutes, but you can start it manually:

1. Open the Haylou Fun app.
2. Go to the Statistics tab.
3. Pull the screen down for an update.

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If notifications come with a delay, try disabling battery optimization for the Haylou Fun app in the MIUI settings. To do this, go to Settings → Battery and Performance → Battery Optimization, find Haylou Fun, and select "No Limits."

Solving common connection problems

Even with the right instructions, Xiaomi users may encounter common errors, and we’ve compiled the most common ones and how to fix them.

⚠️ Attention! On Xiaomi phones with MIUI China may not have support for Google Services, which causes Haylou Fun to crash, in which case it is recommended to install global firmware or use an alternative Notify & Fitness for Haylou app (available on Google Play).

If none of these methods worked, try resetting the clock to factory settings:

1. On the clock go to Settings → System → Reset.
2. Confirm the action (the clock will reset).
3. Repeat the connection process from scratch.

Optimizing the work of the clock with the Xiaomi phone

To ensure that Haylou Smart Watch 2 is stable and without delay, follow these guidelines:

• 🔋 Charging: Try not to discharge the watch below 10%.Full discharge can cause synchronization failure.
• 📶 Bluetooth: Keep your phone and watch no more than 10 metres away.Walls and obstacles degrade signal.
• 🔄 Updates: Check the firmware updates for the watch regularly in the Haylou Fun app.
• 🛡️ Security: Do not connect your watch to public Wi-Fi networks via your phone – this could lead to data leakage.

For Xiaomi users with root rights or custom firmware (LineageOS, Pixel Experience), additional configuration may be required:

• Make sure that build.prop does not turn off Bluetooth LE (Low Energy).
• Check for the file. /vendor/etc/bluetooth/bt_stack.conf — Its absence may cause problems with conjugation.

⚠️ If you are using Xiaomi with MIUI 14 and later, note the "Super Wallpaper" feature. Animated wallpapers can conflict with Haylou Fun's background processes, causing delays in synchronization. Try changing wallpapers to static ones.

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For maximum stability, disable the Adaptive Battery feature in the MIUI settings for the Haylou Fun app. This will prevent the process from automatically closing in the background.

Alternative ways to connect (without Haylou Fun)

If the official Haylou Fun app doesn’t work or isn’t available in your area, you can use alternative methods:

1. Notify & Fitness for Haylou: Supports most of the features of the original software. Accessible to Google Play. Requires manual notification settings for each application.

Gadgetbridge

• Open source application with support for many smart watches.
• It requires manual tuning and knowledge of technical nuances.

⚠️ Attention! Do not interrupt the upgrade process - this may lead to the clock "bricking" Make sure the charge level is above 50%.