The first pairing process is the most important step. If the pairing is completed correctly, the band should reconnect automatically during normal daily use whenever Bluetooth is enabled and the band is within range of your Android phone.
This guide explains every important part of pairing the Xiaomi Mi Smart Band 4 with an Android phone. It includes preparation, charging, installing the app, signing in, granting Android permissions, starting pairing from inside the app, confirming the request on the band, completing the first sync, allowing notifications, keeping the connection stable, switching phones, unbinding, factory reset, and fixing common Bluetooth problems.
1. What You Need Before Pairing
Before trying to connect the Xiaomi Mi Smart Band 4 to an Android phone, make sure a few basic requirements are ready. Preparing these items first can prevent most pairing problems.
Device Requirements
- An Android phone with Bluetooth enabled.
Bluetooth is required because the Mi Smart Band 4 communicates with the phone wirelessly through Bluetooth. - A supported Android version.
The band generally works with Android phones that support the Mi Fit app. Older Android versions may not work properly with newer app versions. - Xiaomi Mi Smart Band 4 with enough battery charge.
It is best to charge the band to at least 30% before pairing. A low battery may interrupt the pairing or firmware update process. - A stable internet connection.
Your phone needs internet access to sign in, sync account data, and download firmware updates if required.
Software Requirements
- Mi Fit app or updated regional app branding.
Install the official app from the Google Play Store or another trusted official app source available in your region. - A Mi account or compatible login account.
You need an account to save fitness records, bind the band, sync data, and manage settings.
Android System Settings to Prepare
Before pairing, check these Android settings:
- Bluetooth: Must be turned on before pairing.
- Location: Often required for Bluetooth scanning on Android. Turning on Location can help the app find the band.
- Internet connection: Use WiFi or mobile data so the app can sign in and sync.
- Battery optimization: You can adjust this after pairing, but remember that aggressive battery saving may later cause disconnections.
- App permissions: Allow Bluetooth, nearby devices, location, notifications, and background activity permissions when requested.
Once these settings are prepared, you are ready to pair the band.
2. Charge and Wake Xiaomi Mi Smart Band 4 for the First Time
If the band is brand new, has not been used for a long time, or does not respond when touched, charge it before pairing.
Charging Before Pairing
- Remove the band module from the strap if necessary.
- Place the tracker body into the correct charging cradle.
- Connect the charger to a USB power source.
- Wait until the band wakes and shows a battery icon.
- Allow it to charge to a usable level before starting pairing.
Pairing while the battery is almost empty is not recommended. The band may disconnect, power off, or fail during the first sync or firmware update.
Waking the Band
To wake the band, tap the bottom area of the screen or press the touch button. If the band shows a pairing icon, setup instruction, or connection prompt, it is ready to be added to a phone.
Keep the band close to your Android phone during the pairing process. A distance of about 30 to 50 cm is ideal during setup.
3. Install Mi Fit and Sign In on Android
The Xiaomi Mi Smart Band 4 should be paired through the Mi Fit app, not directly from Android Bluetooth settings. The app manages the Bluetooth connection, account binding, firmware updates, settings, and data sync.
Installing the App
- Open the Google Play Store on your Android phone.
- Search for Mi Fit or the updated official app name used in your region.
- Install the official app.
- Open the app after installation is complete.
Signing In
After opening the app, log in using an existing Mi account or create a new account if you do not already have one. Depending on your region and app version, you may be able to register with an email address, phone number, or another supported login method.
Signing in is important because the band is bound to your account. Your activity history, sleep records, device settings, and personal profile data are stored through the app account.
Permissions Requested by the App
After logging in, the app may ask for several permissions. Granting the correct permissions helps the band work properly.
- Location access: Needed for Bluetooth device scanning on many Android versions and for features such as weather.
- Nearby device or Bluetooth permission: Needed to find and connect to the band.
- Storage permission: May be used for saving app data, logs, or firmware files.
- Physical activity permission: May be used for activity tracking integration on newer Android systems.
- Notification access: Required if you want app notifications on the band.
- Contacts or phone permission: May be required for incoming call alerts and caller name display.
If you deny important permissions, the band may still pair, but some features such as notifications, call alerts, weather, or background sync may not work correctly.
4. Start the Pairing Process from Mi Fit
All pairing should be started from inside the Mi Fit app. Do not manually pair the band from Android’s Bluetooth settings first. If the band is paired from the Android Bluetooth menu without using the app, the app may not bind it correctly.
Pairing Steps in Mi Fit
- Open the Mi Fit app.
- Go to the Profile or My devices section.
- Tap Add device or the plus icon.
- Select Band as the device type.
- Wait while Mi Fit searches for nearby bands.
Important Pairing Rules
- Do not pair from the Android Bluetooth menu first.
- Keep the band close to your Android phone.
- Keep only one Mi Smart Band 4 nearby if possible.
- Make sure the band is not already connected to another phone.
- Keep Bluetooth and Location turned on during scanning.
When the app finds your band, it may display the band name, model, or device ID. The app will then ask you to confirm pairing.
5. Confirm Pairing on Xiaomi Mi Smart Band 4
After Mi Fit detects the Xiaomi Mi Smart Band 4, the band will vibrate and show a confirmation message or icon on its screen. This step confirms that you want to bind the band to your phone.
To confirm pairing, tap the button or confirmation icon shown on the band screen. The exact display may vary depending on firmware language and version, but the purpose is the same.
Pairing will not complete until you confirm on the band itself. This helps prevent accidental pairing with someone else’s phone nearby.
If the Confirmation Request Disappears
If you wait too long, the confirmation request may time out. If this happens, restart the pairing process from the app and wait for the band to vibrate again.
6. Complete the First Sync and Firmware Update
Immediately after pairing, Mi Fit will perform the first synchronization. This prepares the band for normal daily use.
What Happens During First Sync
- The correct time and date are sent from your Android phone to the band.
- Your profile information is synced to the band.
- Units such as metric or imperial may be applied.
- Default settings are configured.
- Language settings may be adjusted if supported.
- The app checks whether a firmware update is available.
If a Firmware Update Appears
If a new firmware version is available, the app may prompt you to update the band. Firmware updates can improve stability, fix bugs, add functions, or improve compatibility with Android.
During a firmware update:
- Keep the band near the phone.
- Do not close the Mi Fit app.
- Do not turn off Bluetooth.
- Do not power off the phone.
- Make sure the band has enough battery.
- Wait until the update progress reaches 100%.
The band may restart after the update is complete. This is normal. After the first sync and any required update, the Mi Smart Band 4 is ready for daily use.
7. Allow Notifications and Extra Android Permissions
Bluetooth pairing connects the band to the phone, but features like call alerts, message notifications, app alerts, and weather updates require additional permissions.
Enable App Alerts
In the Mi Fit app, open the Mi Smart Band 4 device page and look for App alerts, Notifications, or a similar option.
Turn on app alerts and select which apps are allowed to send notifications to the band. Android may ask you to grant Notification Access to Mi Fit. Approve this permission if you want notifications to appear on the band.
Enable Incoming Call Alerts
If you want the band to vibrate when your phone receives a call, enable incoming call alerts in the app. If the app asks for phone or contacts permission, allow it so caller names can appear.
Other Useful Permissions
- Weather: May require Location permission.
- Find band: Requires Bluetooth connection.
- Find phone: Requires the app to run in the background.
- Screen unlock: May require extra Android security permissions on supported devices.
These settings are not strictly part of Bluetooth pairing, but enabling them after pairing helps the band work as expected.
8. Keep the Bluetooth Connection Stable on Android
Once the Xiaomi Mi Smart Band 4 is paired, it should reconnect automatically whenever Bluetooth is turned on, the band is nearby, and the Mi Fit app is allowed to run in the background.
Battery Optimization Settings
Many Android phones aggressively close background apps to save power. This can stop Mi Fit from syncing or forwarding notifications.
To keep the connection stable, open Android system settings and find the Mi Fit app. Depending on your phone brand, adjust settings such as:
- Allow background activity.
- Disable strict battery optimization for Mi Fit.
- Allow auto-start if your phone has an autostart manager.
- Allow background data usage.
- Do not restrict Bluetooth access.
- Lock the app in recent apps if your phone supports that option.
Bluetooth Range
Bluetooth range is usually limited indoors. Walls, metal objects, furniture, and wireless interference can reduce the connection distance.
A typical indoor range may be around 5 to 10 meters, but this depends on the phone, environment, and obstacles. If you walk too far from your phone, the band may disconnect. It should reconnect automatically when you return within range.
9. Reconnect When the Band Appears “Disconnected”
If Mi Fit shows the Xiaomi Mi Smart Band 4 as Disconnected, do not panic. Temporary disconnection can happen when Bluetooth is off, the band is out of range, or Android has closed the app in the background.
Basic Reconnection Steps
- Make sure Bluetooth is turned on in Android.
- Move the band and phone close together.
- Open Mi Fit and wait a few seconds.
- Pull down or refresh the band device page if available.
- Wait for the app to reconnect automatically.
If It Still Does Not Reconnect
- Turn Bluetooth off and back on.
- Close and reopen Mi Fit.
- Restart the Android phone.
- Restart the band from its settings menu if available.
- Charge the band if the battery is low.
Avoid removing or forgetting the band from Android Bluetooth settings unless you are planning to re-pair it fully through Mi Fit.
10. Switch Xiaomi Mi Smart Band 4 to a New Android Phone
If you change phones, move the band carefully so your data remains linked to the correct account and the band does not get stuck between devices.
Recommended Steps on the Old Android Phone
- Open Mi Fit.
- Sync the band so recent data is uploaded.
- Make sure you know your Mi account login details.
- If you are giving the band to someone else, unbind it first.
Recommended Steps on the New Android Phone
- Install Mi Fit.
- Log in with the same Mi account you used before.
- Turn on Bluetooth and Location.
- Go to Profile or My devices.
- Select Add device > Band if the band is not detected automatically.
- Follow the pairing prompts.
- Confirm the request on the band screen.
If the band refuses to pair with the new phone, check whether it is still connected to the old phone. Turn off Bluetooth on the old phone or unbind the band from the old app before trying again.
11. Unbind the Band from Mi Fit and Android
Unbinding is useful when you want to give the band to someone else, change accounts, solve persistent connection problems, or start fresh.
How to Unbind from Mi Fit
- Open Mi Fit on Android.
- Go to the Profile tab.
- Select Xiaomi Mi Smart Band 4 from My devices.
- Scroll down and find Unpair or Unbind.
- Confirm the unbinding.
After unbinding, the band may reboot and return to a pairing state. If you are giving the band to someone else, also remove it from Android Bluetooth settings.
Remove from Android Bluetooth List
- Open Android settings.
- Go to Bluetooth settings.
- Find the Mi Smart Band 4 in paired devices.
- Tap the settings icon beside it.
- Select Forget, Unpair, or Remove.
This helps prevent old Bluetooth records from interfering with future pairing.
12. Factory Reset Xiaomi Mi Smart Band 4
If connection issues continue after unbinding, or if you plan to pass the band to another person, you can perform a factory reset directly from the band.
How to Factory Reset
- Wake the band screen.
- Swipe to the settings menu.
- Look for Factory reset, Reset, or a similar option.
- Tap the option.
- Confirm the reset on the band screen.
What Factory Reset Does
- Erases local data and settings from the band.
- Returns the band to its initial pairing screen.
- Removes local connection information.
- Allows the band to be paired again as a new setup.
Historical data already synced to the app account should remain in the account. However, unsynced data stored only on the band may be lost.
13. Typical Pairing Problems and How to Fix Them
Problem: Mi Fit Cannot Find the Band During Add Device > Band
If the app cannot find the band, try the following:
- Bluetooth may be off or unstable.
Turn Bluetooth off and on again. Make sure Airplane Mode is not blocking wireless connections. - Location may be off.
Turn on Location and allow the app to access it. - The band may already be paired with another phone.
Unbind it from the old phone or account first. - The band may be too far away.
Place the band very close to the phone during scanning. - There may be Bluetooth interference.
Move away from many other Bluetooth devices or metal surfaces. - The band may be in an odd state.
Restart the band if possible, place it briefly on the charger, and try again.
Problem: Pairing Works, but Notifications Do Not Appear
Pairing and notifications are separate. If the band connects but does not show notifications, check these settings:
- Enable app alerts in Mi Fit.
- Grant Notification Access to Mi Fit in Android settings.
- Allow Mi Fit to run in the background.
- Disable strict battery optimization for Mi Fit.
- Confirm that the band shows as connected.
- Check that Do Not Disturb mode is not blocking alerts.
Problem: Band Connects and Disconnects Frequently
Frequent disconnection is usually caused by distance, interference, or Android battery restrictions.
- Keep the phone and band closer together.
- Reduce obstacles between the phone and band.
- Turn off aggressive power-saving modes.
- Allow Mi Fit background operation.
- Restart both the phone and the band.
- Re-pair the band if the behavior continues.
Problem: Pairing Request Does Not Appear on the Band
If the app finds the band but the band does not show a confirmation request, restart the search. Make sure the band screen is awake and close to the phone. If needed, restart the band or place it on the charger briefly.
Problem: Android Bluetooth Shows the Band but Mi Fit Does Not
This can happen if you attempted to pair through Android Bluetooth settings instead of Mi Fit. Remove the band from Android Bluetooth paired devices, then start pairing again from inside Mi Fit.
Problem: Band Is Bound to Another Account
If the band is still bound to another Mi account, it may not pair with your account. Ask the previous owner to unbind it from their app. If you used the band before, log in to the same account and unbind it properly.
14. Best Practices for Smooth Bluetooth Pairing and Use
To keep the Xiaomi Mi Smart Band 4 and Android phone working together smoothly, follow these best practices:
- Always pair from inside Mi Fit, not from Android Bluetooth settings.
- Keep Bluetooth enabled if you want continuous sync and notifications.
- Keep Location enabled when pairing or when the app requires it.
- Use one stable Mi account for the band.
- Avoid switching accounts unnecessarily.
- Allow Mi Fit to run in the background.
- Disable strict battery restrictions for Mi Fit.
- Unbind properly before changing phones or giving the band away.
- Keep Mi Fit updated.
- Install firmware updates when available and safe to do so.
- Keep the band charged before pairing or updating.
- Keep the band close to the phone during setup.
15. Android Permission Checklist
If pairing or features do not work correctly, review this permission checklist:
- Bluetooth: On.
- Location: On during pairing.
- Nearby devices: Allowed if your Android version asks for it.
- Notification access: Allowed for notifications.
- Contacts: Allowed if you want caller names.
- Phone permission: Allowed if needed for call alerts.
- Background activity: Allowed.
- Battery optimization: Not restricted for Mi Fit.
- Mobile data or WiFi: Available for account sync.
16. Daily Bluetooth Use After Pairing
After the first setup, daily use is simple. Keep Bluetooth on and keep the band near the phone when you want syncing and notifications. The band can still record some activity data even when temporarily disconnected, then sync later when reconnected.
For best results, open Mi Fit once in a while to sync data. This is especially useful after workouts, sleep tracking, or long periods away from the phone.
17. Quick Pairing Summary
- Charge the Xiaomi Mi Smart Band 4.
- Turn on Bluetooth on your Android phone.
- Turn on Location if required for Bluetooth scanning.
- Install the Mi Fit app.
- Log in or create a Mi account.
- Allow required permissions.
- Open Mi Fit and go to Add device.
- Select Band.
- Keep the band close to the phone.
- Wait for the app to find the band.
- Confirm pairing on the band screen.
- Wait for first sync and firmware update if required.
- Enable notifications and call alerts if desired.
- Adjust battery optimization so Mi Fit can run in the background.
18. Final Notes
Bluetooth pairing with Android should normally be a one-time setup. Once the Xiaomi Mi Smart Band 4 is properly paired through Mi Fit, it should reconnect automatically whenever the phone and band are close enough and Bluetooth is enabled.
If connection problems occur, check the basics first: Bluetooth, Location, app permissions, battery optimization, distance, and whether the band is still bound to another phone or account.
With the correct setup, the Xiaomi Mi Smart Band 4 can quietly track your daily life and deliver activity, sleep, heart rate, notification, and workout information from your wrist to your Android phone.