Connecting Xiaomi Watch 4 to a smartphone: full instructions with pictures and tips

Why does Xiaomi Watch 4 require the right connection?

The Xiaomi Watch 4 is not just an accessory, but a full-fledged fitness tracker with advanced health monitoring, notifications and even support for payments via NFC. However, all these features become available only after proper synchronization with the phone. Many users face problems already at the interface stage: the clock is not defined in the application, the connection is interrupted or the functions are unstable.

In this article, we will analyze the step-by-step algorithm for connecting Xiaomi Watch 4 to Android and iOS smartphones, examine common errors and give recommendations for optimizing the device’s performance, focusing on setting up notifications, synchronizing health data and solving connection problems via Bluetooth 5.2.

⚠️ Important: If you update the firmware of the watch from an older model (for example, with the Mi Band 7), some settings may reset. Xiaomi Watch 4 requires mandatory binding to the Mi Account - without it, some functions (for example, training history) will not be available.

What's it gonna take to connect?

Before starting the process, make sure you have everything you need:

• 📱 Smartphone on Android 8.0+ or iOS 12.0+ (iPhone requires Mi Fitness version 4.6.0 and higher).
• 🔋 Charged clock (minimum 50% battery – otherwise the connection may be interrupted).
• 📲 Mi Fitness (formerly Zepp Life) – download the latest version from Google Play or App Store.
• 🔄 Stable Internet connection (Wi-Fi or mobile network) for downloading firmware.
• 🔒 Mi Account (if not, register in advance on Xiaomi website).

💡 Tip: If you have an iPhone, turn off Bluetooth at Control Point before connecting and turn it back on via Settings → Bluetooth.This helps avoid device detection problems.

Step-by-step: Connecting to Android

Syncing with Android is usually smooth, but there are nuances.

1. Install the Mi Fitness app. Download it from Google Play and open it. You'll need to log in to (or create) Mi Account when you first start.
2. Start a device search. In Mi Fitness, click Profile → Add Device → Watch → Xiaomi Watch 4. The watch should appear in the list.

⚠️ Note: If the watch is not detected, try it:

• 🔄 Reboot Xiaomi Watch 4 (click the side button for 10 seconds).
• 📱 Clear the cache of the Mi Fitness app in your phone settings.
• 🔌 Disable Energy Saving for Mi Fitness in Battery Settings.

Install Mi Fitness | Log in Mi Account | Enable Bluetooth and Geodata | Charge the watch to 50%+| Update the firmware of the watch-->

Connection to iPhone: features and limitations

With iOS, the process is similar, but there are key differences:

1. Install Mi Fitness from the App Store. make sure the app version is at least 4.6.0 - older ones may not support the Watch 4.

⚠️ Note: On the iPhone Xiaomi Watch 4 have restrictions:

• 🚫 No support for Xiaomi Pay (NFC-Payments only work on Android).
• 📵 Call notifications come without a response (only refusal).
• 🔄 Synchronization of data can be delayed up to 10 minutes.

Set up notifications and calls

After connecting, set up alerts to avoid missing important messages:

1. Allow notifications in Mi Fitness. Go to Profile → Xiaomi Watch 4 → Notifications and activate the switch.
2. Select apps. Click Notification Management and tick messengers (WhatsApp, Telegram), emails and other apps you want to see on your watch.
3. Set up the vibration. In the same menu, you can select the vibration type (short/long) and turn on the Raising of the Hand to wake up.
4. Activate incoming call display. In Settings → Calls, turn on the option to Display incoming calls. On Android, you can also set call rejection right from the clock.

💡 Useful tip: If notifications are duplicated (come to both the phone and the clock), in Android settings, disable duplicate for specific applications in the Notifications section. → Additionally.

Set up fitness functions and health monitoring

Xiaomi Watch 4 is equipped with sensors for heart rate tracking, SpO₂ (oxygenation, sleep and stress, so that everything works properly:

1. Activate continuous heart rate monitoring. In Mi Fitness, go to Profile → Xiaomi Watch 4 → Monitor the heart and select a mode: 🔄 Auto – Measurement every 10 minutes. 📊 Manual - only on request. 💤 In a dream, continuous tracking.

Set up sleep tracking.

Turn on the option of Sleep Monitor and specify the usual time for going to bed. The clock will automatically go to "Do not disturb".

Calibrate the pedometer.

For data accuracy, walk 20 steps with your phone in your hand, then to Settings → Stepmer → Calibration confirm synchronization.

Turn on high pulse notifications.

In Heart Monitor → Warnings, set a threshold value (e.g., 120 beats/min).

⚠️ Attention: Sensor SpO₂ It may show inaccurate data when moving or when the watch is not fit. For accurate measurement, sit still for 1-2 minutes.

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If the watch shows an understated number of steps, check the density of the strap fitting - the sensor works correctly only when in close contact with the skin.

Solving Typical Connection Problems

Even with the right setup, there can be failures, and let’s look at the most common errors and how to fix them:

1.The watch is not found in Mi Fitness

• 🔌 Reboot Xiaomi Watch 4 (hold the side button for 10 seconds).
• 📱 In the phone settings, clear the Mi Fitness cache and restart the app.
• 🔄 Turn off Bluetooth, then turn it back on.
• 📡 Check if the antivirus or power saving mode is blocking the application.

2. The connection breaks.

• 🔋 Make sure the clock charge is above 30%.At low battery level, Bluetooth can shut down.
• 📶 Check if other devices (earphones, fitness bracelets) interfere.
• 🔄 Update the watch firmware and Mi Fitness app to the latest version.

3. Data is not synchronized

• 🔄 In Mi Fitness go to Profile → Xiaomi Watch 4 → Synchronize data and click Update.
• 📱 Check your internet connection – network access is required for synchronization.
• 🔒 Log out of Mi Account and log in again.

💡 Key Conclusion: If the problem is not solved, try resetting the clock to factory settings (in Settings). → System system → Reset) and reconnect.

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90% of connection problems are solved by restarting the clock and cleaning the cache of the Mi Fitness app.

FAQ: Frequent questions about Xiaomi Watch 4