Reconnect Xiaomi Mi Band 4: reset, synchronize and eliminate errors

The Xiaomi Mi Band 4 fitness bracelet remains a popular gadget even years after its release due to its reliability and functionality. However, when changing your smartphone, resetting your phone or experiencing software failures, users face the need to reconnect the device to the Mi Fit application (or its counterparts like Zepp Life).

In this article, you will find a step-by-step guide to properly disconnecting the Mi Band 4 from your old phone, reset it to factory settings and re-bind it to a new device. We will also look at common problems (such as the “failed to connect” error or the lack of response of the bracelet to search) and how to solve them.

Why you need to reconnect Mi Band 4

There are several situations where you can not do without re-synchronization of the bracelet:

• 📱 Change of smartphone – when you switch to a new phone, the old Mi Fit data is not transferred automatically, and the bracelet remains tied to the previous device.
• 🔄 Reset phone settings – after a hard reset, all conjugated gadgets (including Mi Band 4) are turned off.
• 🐞 Software glitches – if the bracelet is no longer synced, does not show notifications or “hangs” on the Mi logo.
• 👥 Transfer of the bracelet to another user – before selling or transferring the gadget, you must delete all personal data.

It is important to understand that the Mi Band 4 can only be tied to one smartphone at a time, and trying to connect it to a second device without first disconnecting from the first will lead to an error, as well as problems if the phone has an outdated version of the Mi Fit installed or Bluetooth disabled.

Preparing for reconnection: what to do in advance

Before resetting the bracelet settings, follow a few mandatory steps:

1. Save data – if the bracelet has previously been synced to Mi Fit, export your activity history to the cloud or take screenshots of important statistics (e.g. sleep or exercise data) after resetting this information will be lost.
2. Check the charge - the battery level of the bracelet should be at least 20%. If the Mi Band 4 runs out during the procedure, this can lead to software errors.
3. Update the app – install the latest version of Mi Fit (or Zepp Life) from Google Play or the App Store. Older versions often don’t support the correct connection.
4. Turn on Bluetooth – the phone should be activated Bluetooth 4.0+ (for Android) or Bluetooth LE (for iOS).

If you are transferring the bracelet to another person, be sure to delete it from your Mi Fit account through the app menu, otherwise the new owner will not be able to link the gadget to his phone.

Save data from Mi Fit| Charge bracelet to 20%+|Update Mi Fit/Zepp Life|Enable Bluetooth on your phone |Delete bracelet from your old account (when transferring)

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How to reset Xiaomi Mi Band 4 to factory settings

Before you connect to a new phone, you have to return the bracelet to the factory settings, which will delete all the data from the previous binding and allow you to sync "from scratch." There are two ways to reset:

Method 1: through the bracelet menu

If the Mi Band 4 is activated and reacts to touch:

1. Swipe your finger across the bracelet screen to the left until you find the Settings item (the gear icon).
2. Scroll down to the Reset (or Reset) option.
3. Confirm the action by ticking the tick. The bracelet vibrates and reboots.

Method 2: Hardware reset (if the screen is unresponsive)

If the bracelet is “hang” or does not respond to touch:

1. Unplug the strap from the body of the Mi Band 4.
2. Find a small hole on the back of the case that says "Reset".
3. Take a paper clip or needle, press and hold the reset button for 10-15 seconds until the bracelet vibrates.

Once reset, the bracelet will automatically reboot and display the Mi logo. It is now ready for a new binding.

Step-by-step instructions for connecting Mi Band 4 to a new phone

After resetting the bracelet, follow the following steps to tie it to the new smartphone:

Step 1: Installation and configuration of the application

Download the official appendix:

For Android: Mi Fit on Google Play.

For iOS: Mi Fit in the App Store.

Sign up or sign in to an existing Xiaomi account (if you transfer the bracelet to another user, create a new account). From the app menu, select Profile → Add Device → Bracelet → Mi Smart Band 4.

Step 2: Synchronize the bracelet

Activate Bluetooth on your phone and follow the instructions in the app:

1. Click "Connect" in Mi Fit.

2.Wait until the app detects Mi Band 4 (the bracelet should vibrate).

3. Confirm the pairing on the phone and bracelet (touch the ticks on the screen of the gadget).

4. wait until the data synchronization is completed (it can take up to 5 minutes).

If the bracelet is not detected, try:

• 🔄 Reboot your phone and bracelet.
• 📶 Turn off/enable Bluetooth.
• 📱 Remove Mi Band 4 from the list of associated devices in the Bluetooth settings of the phone and repeat the search.

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If the bracelet is connected but the data is not synchronized, try Mi Fit to go to Profile → Mi Smart Band 4 → Sync the data and start the process manually.

Step 3: Set up notifications and settings

After successful connection:

• 🔔 Set up notifications in Profile → Mi Smart Band 4 → Notifications (enable alerts for calls, SMS applications).
• ⏰ Set alarms and reminders of inactivity.
• 🏃‍♂️ Activate activity tracking (steps, sleep, pulse) in the appropriate sections.

For iOS, you additionally need to allow Mi Fit to access notifications in your system settings (Settings → Notifications → Mi Fit).

Typical errors and their solutions

Even if you follow instructions correctly, users often face problems.

If none of these methods worked, try removing the Mi Fit cache (on Android: Settings → Apps → Mi Fit → Memory → Clear the cache). On iOS, remove and reinstall the app.

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If the bracelet was previously linked to another user’s Xiaomi account, the new owner will not be able to connect it until the old account removes the device from the list of gadgets.

Features of connection on Android and iOS

The Mi Band 4 synchronization algorithm differs depending on the phone’s operating system.

Android.

Android 10+ devices may experience problems due to application background activity limitations, and to avoid connection breaks:

1. Go to Settings → Applications → Mi Fit → Battery.
2. Select “No restrictions” or “Allow background activity”.
3. Turn off battery optimization for Mi Fit.

Some Xiaomi, Samsung or Huawei models also require manual permission for Mi Fit to access geodata and auto-run data.

On iOS (iPhone)

On the iPhone, the main difficulties are associated with Apple’s restrictions on the background work of Bluetooth:

• 🔗 After connecting Mi Band 4, open Settings → Bluetooth and make sure the bracelet appears in the list of My Devices».
• 🔔 Allow notifications for Mi Fit in Settings → Notifications.
• 🔄 If synchronization is interrupted, go to Settings → Mi Fit → Background update of applications and enable the option.

On iOS 14+, you may also need to allow Mi Fit to access local networks in your privacy settings.

What to do if Mi Band 4 is not responding to the connection

If the bracelet doesn’t vibrate when searching, doesn’t display the Mi logo, or doesn’t turn on at all, follow these steps:

1. Check the charge - connect the Mi Band 4 to the charger for 30 to 60 minutes. If the charging indicator is not on, try another cable or power supply.
2. Clean the contacts - dirt or oxidation on the charging contacts can interfere with the supply of power.
3. Check for physical damage – if the bracelet fell or came into contact with water (despite the WR50 claimed), it could have damaged the board.
4. Update the firmware – connect the bracelet to Mi Fit and check for updates in the Profile → Mi Smart Band 4 → Update firmware.

If the bracelet is still unresponsive, it may indicate a hardware malfunction, in which case contact Xiaomi’s service center or consider replacing the battery (the average battery life of the Mi Band 4 is 1.5-2 years).

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If the bracelet doesn't turn on after long storage, its battery could run out completely. Connect it to charging for 2-3 hours - sometimes enough to restore performance.

FAQ: Frequent questions about Mi Band 4 reconnection