The Xiaomi Mi Band 4 fitness bracelet remains a popular choice among iPhone users due to its combination of affordable price, long-term autonomy and wide functionality. However, synchronizing the gadget with iOS devices often raises questions: the official Mi Fit app has given way to Mi Fitness, connectivity algorithms have changed, and Apple’s restrictions on the background of applications add complexity.
In this article, you will find the current 2026 instructions for connecting the Mi Band 4 to the iPhone, including device preparation, step-by-step configuration through Mi Fitness, solving common errors (such as code 10008 or no notifications), as well as tips for optimizing the performance of the bracelet.
Preparing for connection: what to do before synchronization
Before you start connecting, make sure your iPhone and Mi Band 4 meet the minimum requirements, which will eliminate most of the pairing errors.
For iPhone, the following conditions apply:
- 📱 iOS version: no lower than 12.0 (15.0 recommended)+ For stable operation, you can check the version in Settings → Mainstream → About this device.
- 📲 Free space: at least 500MB on the device (Mi Fitness app weighs) ~200MB, plus a cache of data).
- 🔋 Battery charge: on iPhone - at least 20%, on Mi Band 4 - 50% (at low charge, the bracelet can turn off during synchronization).
- 📶 Internet connection: stable Wi-Fi or mobile Internet (3G/4G/5G) for downloading the application and updating the firmware bracelet.
For Xiaomi Mi Band 4, check out:
- 🔄 Firmware: current version (last at 2026 - 1.0.9.58) You can update via the application after connecting.
- 🔒 Resetting: If the bracelet has already been paired with another phone, reset via Bracelet Settings → Reset (hold the touch button for 10 seconds until vibration appears).
- 🔋 Charging: Connect the bracelet to the charger for 15-20 minutes if the indicator shows a low charge (even if it is turned on).
⚠️ Note: If your iPhone has previously used the Mi Fit app, remove it via Settings → Mainstream → iPhone storage and reboot device: Data conflict between old and new app (Mi Fitness) can lead to 10008 error.
Installation and configuration of the Mi Fitness app on iPhone
The official Mi Fitness app (formerly Mi Fit) is the only supported way to connect the Mi Band 4 to an iPhone.Alternative apps (like Notify & Fitness or Mi Bandage) may offer advanced features, but often violate Apple's policies and are blocked.
Follow the installation instructions:
- Open the App Store and find the Mi Fitness app (developed by Xiaomi Inc.) download and install it.
- Once installed, launch the app and select the region of Russia (or your country), which is important for the notifications to work properly.
- Sign up or sign in to a Xiaomi account (via Google, Apple ID or phone number) without an account, data synchronization will be limited.
- Click Add Device and select the Bracelet → Mi Smart Band 4.
If the app does not find the bracelet:
- 🔍 Make sure that Bluetooth on your iPhone is enabled (Settings) → Bluetooth).
- 📱 Reboot the Mi Band 4 (hold the touch button for 10 seconds until vibration).
- 🔄 In the Mi Fitness app, click Update the Device List (circular arrow icon in the upper right corner).
- 🚫 Turn it off. VPN or power saving mode on iPhone – they can block the connection.
Install Mi Fitness from the App Store|Registering a Xiaomi account|Turn Bluetooth on your iPhone|Reset the bracelet settings (if previously paired)|Charge the Mi Band 4 to 50%+-->
Step-by-step connection Xiaomi Mi Band 4 to the iPhone
When the Mi Fitness app is ready, start pairing devices. The process takes 2-5 minutes, but requires precise execution of steps.
Instructions for connection:
- Open Mi Fitness and click Add Device → Bracelet → Mi Smart Band 4.
- It'll appear on screen. QR-It's okay to have a code saying "no scanner found.
- The bracelet vibrates and displays a 4-digit code. Enter it into the iPhone app.
- Confirm the pairing on the bracelet (touch the ticks on the Mi Band 4 screen).
- Wait until the sync is complete (progress bar in the app), at which point the bracelet may reset.
After successful connection:
- 📲 The app will offer to update the firmware of the bracelet. it is recommended to agree, as the new versions fix synchronization errors with iOS.
- 🔄 Set up the basic parameters: sex, age, weight (affects the accuracy of calorie counting).
- 🔔 Include notifications in bracelet settings → Notifications (allow access to iPhone Settings) → Notifications → Mi Fitness).
⚠️ Note: If the bracelet does not display the time or date after you connect, check the sync settings in Mi Fitness. → Profile → Settings → Data synchronization. Sometimes you need to manually update through Synchronize Now.
What if Mi Band 4 doesn’t vibrate when connected?
Set up notifications and synchronize data with iPhone
One of the biggest problems with using the Mi Band 4 on the iPhone is the unstable notifications, which are due to Apple's restrictions on the background activity of the apps, but there are ways to optimize the work.
How to set up notifications:
- In Mi Fitness, go to Profile → Mi Smart Band 4 → Notifications.
- Turn on the Notifications switch and select the applications you want to see on the bracelet (for example, WhatsApp, Telegram, Calls).
- In iPhone settings → Notifications → Mi Fitness, turn it on: 🔔 Allow notices 📌 Sounds (optional) 🔄 Showing in history
Mi Fitness
Synchronize
To ensure that notifications are stable:
- 🔋 Don’t close Mi Fitness in the background (swipe up in multitasking).
- 🔄 Once every 2-3 days, open the application for forced synchronization.
- 📱 In iPhone settings → Battery. → Battery status disable Charging Optimization for Mi Fitness (this prevents background work from being suspended).
- 🔌 Reboot your iPhone every 5-7 days – it resets the cache of system processes responsible for Bluetooth.
| Problem. | Reason. | Decision |
|---|---|---|
| Notifications don't come in. | iOS restrictions on background work | Open Mi Fitness once every 2 days, disable battery optimization for the app |
| The bracelet does not vibrate when ringing. | Notified to the "Phone" is not included. | In Mi Fitness, select "Calls" in the notification list |
| Data is not synchronized | Weak Bluetooth connection | Reboot iPhone and bracelet, repeat synchronization |
| The bracelet shuts down on its own. | Low charge or conflict with other Bluetooth devices | Charge to 100%, disable other gadgets (earphones, speakers) |
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If notifications are late, try turning off Do Not Disturb mode on your iPhone (Settings → Do Not Disturb). Even if it is manually enabled, iOS may delay the transmission of alerts to the bracelet.
Solving common connection errors
When syncing Mi Band 4 with iPhone, users often encounter errors related to Bluetooth protocol, account conflicts or outdated firmware. Consider the most common error codes and how to fix them.
Error 10008 ("Unable to connect to the device")
- 🔹 Reason: Data conflict between old (Mi Fit) and new (Mi Fitness) applications.
- 🔧 Solution: Remove both apps (Mi Fit and Mi Fitness) via iPhone Settings → Storage. Reboot your iPhone. Reinstall Mi Fitness and reconnect.
Error 10002 ("Device does not respond"):
- 🔹 Reason: Bracelet is discharged or too far from the iPhone (more than 10 meters).
- 🔧 Solution: Charge the Mi Band 4 to 100%. Make sure there are no obstacles between the devices (walls, metal objects). Reset the bracelet (hold the 10 seconds button).
Data synchronization error (step, sleep, or pulse data are not updated):
- 🔹 Reason: Failure in the cache of the application or outdated bracelet firmware.
- 🔧 Solution: In Mi Fitness go to Profile → Mi Smart Band 4 → Update the firmware. Clear the app cache (iPhone settings) → Warehouse → Mi Fitness → Clear the cache. Disable and reconnect the bracelet in Bluetooth settings.
⚠️ Warning: If the bracelet has stopped responding to touch after the firmware update, reset to factory settings (hold the 20 seconds button until double vibration).This will return the standard settings without losing step data (they are stored in the Xiaomi account).
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If none of these methods worked, try connecting the bracelet to another phone (on Android), updating the firmware, and then buckling it back with the iPhone. This often solves the data freeze problem.
Optimizing the work of Mi Band 4 with iPhone: tips and life hacks
Even after a successful connection, the Mi Band 4 can run unstable, discharge quickly, lose connection, or miscalculate steps. Here are some proven ways to improve the experience.
How to extend the battery life:
- 🔋 Turn off the Hand Raising to activate the screen in the bracelet settings (saves up to 20% charge).
- 🌙 Setting a sleep mode for the period from 23:00 to 7:00 – this turns off unnecessary notifications at night.
- 📊 Reduce your pulse rate to 1 time every 30 minutes (instead of 1 time per minute).
- 🔄 Turn off Bluetooth on your iPhone while you sleep unless you need nighttime notifications.
How to improve the accuracy of data:
- 👟 For accurate steps count, wear a bracelet 2-3 cm above your wrist (closer to your elbow).
- 🏃♂️ When running or training, turn on the appropriate mode manually (Start training) → Run).
- ⚖️ Regularly update your weight in your Mi Fitness profile (every 2-3 weeks).
- 📱 Compare data with Apple Health: In Mi Fitness, enable integration (Profile) → Settings → Apple Health).
How to avoid connection loss:
- 🔄 Reboot Mi Band 4 once a week (hold the 10 seconds button).
- 📱 Do not update iOS in the first 2-3 days after release – new versions often contain bugs in the work with Bluetooth.
- 🔌 If the bracelet is permanently disabled, reset your network settings on your iPhone (Settings) → Mainstream → Reset → Reset the network settings).