Sync Xiaomi Mi Band 3 with phone: full instruction from connection to error fixing

Why is it important to sync Mi Band 3 correctly?

The Xiaomi Mi Band 3 fitness bracelet, despite the release of new models, remains popular due to the balance of price and functionality. However, many users face problems when first syncing a device with a smartphone. Incorrect setting can lead to loss of step data, incorrect display of notifications or even complete failure of communication between gadgets.

In this article, we will explore not only the basic steps of connection, but also the hidden settings in the Mi Fit app that affect connection stability, such as why the bracelet can turn off when you lock your phone screen or how to avoid crashes when you update your firmware. The instructions are relevant for devices on Android 8.0+ iOS 12+, including the latest versions of the application.

We'll focus on common errors that aren't described in the official documentation, like what to do if the Mi Band 3 is defined by the phone as an "unknown device" or why the bracelet stops syncing sleep data after resetting. Let's start with preparation!

Preparing for synchronization: what to do before connecting

Before you start pairing devices, make sure all the preconditions are met, which will save you 80% of the problems during the setup phase.

• 📱 Update your phone's operating system to the latest version. On Android, check in Settings → System system → Update on iPhone - in Settings → Mainstream → Update of the PO.
• 🔄 Remove old versions of the Mi Fit app if they were installed earlier. Version conflict is a common cause of sync failures.
• 🔋 Charge the bracelet to at least 50%. At low charge, the Mi Band 3 can interrupt the connection during data transmission.

Also check if you have battery-saving apps on your phone (like Greenify or Battery Doctor) that often block background Mi Fit activity, which causes the bracelet to stop syncing automatically, and Xiaomi, Huawei and Samsung also need to manually allow the app to auto-run.

Installation and configuration of the Mi Fit application

The official Mi Fit app is the only way to fully sync the Mi Band 3 with your phone.

• 🤖 Android: Google Play (version 4.6.0 or later).
• 🍎 iOS: App Store (version 4.7.0)+).

After installation:

1. Start Mi Fit and select the region "Russia" (important for correct notifications).
2. Sign up with Xiaomi Account, Google or Apple ID. Without an account, synchronization between devices will not be possible.
3. In the app menu, click "Profile → Add device → Bracelet → Mi Smart Band 3".

If the app doesn’t find the bracelet, try:

• 🔄 Reboot Mi Band 3 (press the touch button 10 seconds before vibration).
• 📱 Turn off/enable Bluetooth on your phone.
• 🚫 Remove the bracelet from the list of conjugate devices in the phone settings (Settings) → Bluetooth).

Step-by-step instructions for synchronization of Mi Band 3

When the preparation is completed, start pairing:

1. Confirm the code in Mi Fit: a window will appear in the app asking you to enter the code from the bracelet screen. If the code does not appear, tap the bracelet screen again.
2. Allow access: On Android: Confirm access to contacts, notifications and physical activity. On iOS: turn on Bluetooth in the background (Settings → Mi Fit → Bluetooth).

Update the firmware

Don't interrupt the process.

Synchronization takes 30 seconds to 2 minutes, and if the process is delayed,

• 📶 Check the stability of the Internet connection (required to download account data).
• 🔋 Make sure the bracelet charge level is above 20%.
• 📱 Re-launch the Mi Fit app.

Configure notifications and additional functions

After successful synchronization, we will configure the key functions:

To save battery life, turn off unnecessary notifications, such as alerts from games or social networks can drain the bracelet 15-20% faster, and set up automatic data synchronization in the background:

• 📱 On Android: Settings → Annexes → Mi Fit → Battery → Optimization → No restrictions.
• 🍎 On iOS: Settings → Mi Fit → Updating background data → insert.

💡

If notifications are late, add Mi Fit to the power saving mode exception list. On Xiaomi, this is done in Settings → Battery → Application Selection → Mi Fit → No Limits.

Common mistakes and their solutions

Even after successful synchronization, users face typical problems, and we'll look at the most common ones.

⚠️ Warning: If the bracelet is no longer synced after the firmware update, do not try to roll back the software manually.This may result in loss of communication with Xiaomi servers:

1. Remove the bracelet from your Mi Fit account (Profile → Mi Smart Band 3 → Delete the device).
2. Reset the bracelet to factory settings (press the 20 seconds button).
3. Re-add the device to the application.

Other common mistakes:

• 🔴 "Unable to connect: check if the bracelet is connected to another phone. Mi Band 3 only communicates with one device at a time.
• 🔄 Data is not synchronized: enable automatic synchronization in Profile → Mi Smart Band 3 → Synchronization of data.
• 📵 Bracelet turns off when screen locks: turn off battery optimization for Mi Fit (see instructions above).
• ⏳ Long sync: Reboot your phone and bracelet, then try again.

If the problem persists, check the firmware version of the bracelet. Outdated software may conflict with the latest Mi Fit versions. Update the firmware through the app:

1. Open Profile → Mi Smart Band 3 → Update firmware.
2. Connect the bracelet to charging and wait for the process to complete (at least 80% charge).

💡

90% of synchronization problems are solved by resetting the bracelet and reconnecting. Don't ignore firmware updates, they fix critical communication errors.

Synchronization with multiple phones: is it possible?

Officially, the Xiaomi Mi Band 3 only communicates with one phone at a time, but there are workarounds:

Method 1: Switching between devices

1. Disable the bracelet from the first phone in Mi Fit (Profile → Mi Smart Band 3 → Delete the device).
2. Connect it to the second phone via the same app.

The downside: Step and sleep data will not sync between phones.

Method 2: Using two Xiaomi accounts

Create a second Xiaomi account and link the bracelet to it on another phone, but this will result in data history lost when you switch.

⚠️ Warning: Connecting to two phones at once through one account will cause synchronization conflict and loss of data. Xiaomi does not recommend using this method.

For family use, it is better to purchase a second bracelet - the Mi Band 3 is inexpensive, and synchronization problems will negate all the benefits of savings.

FAQ: Answers to Frequent Questions