How to connect Xiaomi Mi Band 4 to the phone: full instructions with tips and life hacks

Why sync Mi Band 4 with your phone and what it does

The Xiaomi Mi Band 4 fitness bracelet is one of the most popular activity-tracking gadgets, but its capabilities are only revealed when you connect to your smartphone correctly. Without synchronization, you will not be able to receive notifications about calls, messages from messengers or analyze sleep and pulse data in your mobile application. Moreover, some functions like an alarm clock or music control simply will not work without communication with your phone.

The connection process seems simple, but many users face typical problems: the bracelet is not detected via Bluetooth, the Mi Fit app (or its alternative Zepp Life) does not see the device, or sync is interrupted after updating the firmware. In this article, we will discuss not only the basic instructions, but also the nuances for different Xiaomi models (from Redmi Note 8 Pro to Xiaomi 14 Ultra), as well as ways to solve common errors.

If you’ve just unpacked the bracelet or decided to reconnect it after resetting, this guide will help you get it right the first time, and for experienced users, we’ve prepared unique life hacks to optimize communication between Band 4 and your phone that are rarely mentioned in standard guides.

What Xiaomi phones support Mi Band 4

Officially, the Mi Band 4 is compatible with any Android 5.0 or higher or iOS 10.0 or later smartphones, but there are a few important nuances for Xiaomi devices:

• 📱 MIUI 10 and above: Starting with this firmware version, the system has built-in optimization for Xiaomi wearables, which makes it easier to connect and reduces battery consumption.
• 🔄 Older models (until 2018): On the Redmi 4X, Mi A1 Mi 5 may require manual permissions for the Mi Fit app, as automatic settings are often reset.
• 🚀 Flagships (2020–2026): Xiaomi. 12/13/14, Redmi K50 or POCO F5 Connection is faster thanks to Bluetooth support 5.2 and improved energy conservation.
• ⚠️ Chinese versions MIUI: On firmware without Google Services (for example, Xiaomi for the Chinese market), you will have to install Zepp Life through alternative stores like APKMirror.

If your phone is not on this list, check the Android version in the settings path → About Phone → Android Version. For the bracelet to work, it is also important that the phone has at least 1.5 GB of free RAM - otherwise the Mi Fit application can spontaneously close.

Preparing the phone before connecting

Before you start syncing, make sure your smartphone is ready to work with the bracelet, and skipping these steps often leads to errors like “Disconnected” or “Device not found.”

⚠️ Warning: If your phone has an antivirus or an optimizer installed (e.g. Clean Master, Avast), temporarily turn them off.These programs can block background Mi Fit activity, which will shut down the bracelet in a few minutes.

• 📲 Update your phone firmware: Go to Settings → The phone. → Update the system and install the latest patches. MIUI 12.5+, where Bluetooth bugs are fixed.
• 🔋 Charge bracelet: The charge level of the Mi Band 4 should be at least 20%. With a low charge, the device may not appear in the list available for connection.
• 📱 Turn on Bluetooth and geolocation: Although the bracelet is Bluetooth connected, some features (e.g., device search) require enabled GPS. Check in the notification curtain or along the Settings path → Connections → Bluetooth.
• 🗑️ Clear the Bluetooth cache: If you have previously tried to connect the bracelet but failed, go to Settings → Annexes → Application management → Bluetooth and press "Clear Cache".

For Xiaomi users with dual-use SIM-It is important to note that some models (for example, Redmi) 9A) They may conflict with the bracelet if both cards are active. SIM pre-connect.

Update MIUI | Charge bracelet to 20%+|Enable Bluetooth and geolocation |Elean Bluetooth cache |Deactivate antivirus (if any) |Check free memory (1.5 GB+)

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Step-by-step instructions for connecting Mi Band 4

Now, to the synchronization process itself, we'll look at two options: through the official Mi Fit app and through the alternative, Zepp Life (formerly known as Amazfit), the second option is for users who can't install Mi Fit due to regional restrictions.

Method 1: Connecting via Mi Fit

1. Download the Mi Fit app from Google Play or the App Store. For Chinese phones without Google Services, use APKMirror.
2. Sign up or sign in to your Xiaomi account (if not, create it via Register → Email).
3. Click on the + icon in the upper right corner and select the Bracelet → Mi Smart Band 4.
4. Follow the on-screen instructions: Confirm permissions for notifications, calls, and physical activity.
5. When the app asks you to turn on Bluetooth, do so and wait for your Mi Band 4 to appear in the list.
6. Confirm the connection on the bracelet by touching its screen (the tick icon should appear).

Method 2: Connecting with Zepp Life

If the Mi Fit doesn’t fit or see the bracelet, try Zepp Life:

1. Download the app from Google Play or the App Store.
2. Sign in via Xiaomi account (you can use the same one as in Mi Fit).
3. Click Add the device → Bracelet → Mi Band 4.
4. Follow the instructions similar to Mi Fit. Zepp Life has an option to manually search for the device if the automatic scanning didn't work.

Once successfully connected, the bracelet will automatically update the firmware (if a new version is available). Do not interrupt this process - it can take up to 10 minutes. If the update is suspended, restart the phone and bracelet (hold the button on the Mi Band 4 for 10 seconds).

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If the bracelet is not detected, try connecting it to another phone (such as friends or relatives).If the problem persists, reset the Mi Band 4 to factory settings (hold the 20 seconds button until vibration).

Configure notifications and basic functions

Once connected, the bracelet will display time and basic information, but for full use you need to configure notifications and additional features. This is done in the Mi Fit or Zepp Life app in the Device Profile section.

How to enable notifications about calls and messages

• 📞 Calls: Go to Call Notifications and turn on the option, and you can set the vibration and display the caller's name.
• 💬 Messages: In the Notification Management section, select messengers (WhatsApp, Telegram, Viber, etc.) for which you want to receive alerts. MIUI 13+ The option "Show the contents of the message" is available - turn it on if you want to see the text directly on the bracelet.
• ⏰ Alarm clocks: You can add up to 10 alarms to alarm clocks, and on Mi Band 4, they work even if the phone is turned off.

Additional settings

Xiaomi phones with MIUI 12.5+ have a hidden function “Fast Connection”: if you turn it on in Settings → Bluetooth → In addition, the bracelet will connect automatically when you approach the phone (similar to AirPods).

Common mistakes and their solutions

Even with the right connection, users often face problems, and we’ve compiled the most common bugs and fixes that are relevant for Xiaomi in 2026.

1.The bracelet is not in search

• 🔄 Reboot Bluetooth: Turn it off and turn it back on in the notification curtain.
• 📱 Reset network settings: Settings → SIM-maps and mobile networks → Reset network settings (does not delete data, but resets Bluetooth and Wi-Fi).
• 🔋 Check the bracelet charge: If the indicator on the Mi Band 4 flashes red, charge it to at least 30%.

2.The connection is cut off in a few minutes.

⚠️ Note: On Xiaomi phones with MIUI 12-14 is a bug that kills Mi Fit background processes. To fix this, go to Settings. → Annexes → Application management → Mi Fit → Battery → No restrictions.

3.No notifications are coming.

• 🔔 Check the permissions: In the phone settings go to the Apps → Mi Fit → Notifications and turn on all switches.
• 📵 Turn off Do Not Disturb mode: It can block alerts on the bracelet.
• 🔄 Update the bracelet firmware: Go to the Mi Band 4 Profile → Firmware update.

4. The bracelet does not sync the data

If steps or sleep are not shown in the appendix:

1. Open Mi Fit and pull the screen down to start manual synchronization.
2. Check if the background mode for Mi Fit is enabled in the battery settings.
3. Reconnect the bracelet: Profile → Disconnect the device, then reconnect.

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If none of these methods worked, try using the Notify & Fitness for Mi Band alternative app (available on Google Play), which often works more stable than the official Mi Fit on older phones.

How to extend the life of the battery Mi Band 4 when connected to Xiaomi

One of the main problems with the Mi Band 4 is fast battery drain, especially if the bracelet is constantly synced with the phone. On Xiaomi phones, this can be partially fixed with hidden MIUI settings and app optimization.

Optimization on the phone

• 🔋 Turn off auto sync: In Mi Fit, go to Profile → Synchronize data and set manual mode.
• 📴 Limit background activity: In your phone settings, go to Apps → Mi Fit → Battery → Background activity → Limit (but this will disable notifications!).
• 🔄 Use the "Adaptive Battery": In Settings → Battery → Adaptive battery add Mi Fit to exceptions.

Optimization on the bracelet

• ❤️ Reduce the frequency of pulse measurement: In Profile → Heart Monitoring Choose 30 Minutes Instead of 1 Minute.
• 🌙 Turn off sleep tracking if you don’t use this feature.
• 🔔 Leave only important notifications: For example, calls and SMS, And the messengers, turn off.

Xiaomi phones with MIUI 13+ have a hidden feature called Super Battery Saving for wearables to activate:

1. Enable Developer Mode (click 7 times on the MIUI version in your phone settings).
2. Come to the extra. → Super battery saving and add Mi Fit to the list of exceptions.

These settings will help to extend the work of the bracelet from 5-7 days to 10-14 days on a single charge.

FAQ: Frequent questions about connecting Mi Band 4