How to use the Xiaomi Mi Band 4 fitness bracelet: from setup to advanced features

Xiaomi Mi Band 4 It remains one of the most popular fitness bracelets even years after its release. Its combination of affordable price, compactness and wide functionality – from sleep monitoring to music management – makes the device a universal assistant for athletes, office workers and simply active users. 20-30% Bracelet capabilities, unaware of hidden chips.

This article doesn't just repeat the standard instructions out of the box, it reveals practical application scenarios, from basic synchronization to smartphone to fine-tuning notifications and saving battery life. 10 notifications in the Mi Fit app (relevant to Android), why the bracelet may not be able to count steps in transport correctly, and how to use it as a remote for presentations. 2026 It is compatible with most smartphones. Android/iOS.

Preparing for the first switch on: what to do before synchronization

Before you start setting up the Mi Band 4, make sure you have everything you need. The bracelet comes with a minimal set, so some accessories will have to be purchased separately.

Here's the checklist for the start:

Download the Mi Fit (Android) or Zepp Life (iOS) app from the official store

Check the compatibility of the smartphone (Android 5.0+/iOS 10.0+)

Prepare the charger (only a cable is included, the power adapter is not included)

Remove the screen and sensor (often forgotten!)

Make sure that your smartphone is enabled Bluetooth 4.0+-->

Beginning in 2023, Xiaomi has been gradually moving users from Mi Fit to Zepp Life (formerly Amazfit), functionally identical, but Zepp Life has a more modern interface and better synchronization with Apple Health. However, for Android owners, Mi Fit remains the preferred option due to the support of widgets from third-party developers.

⚠️ Note: If you are using a smartphone Xiaomi/Redmi/POCO shelled MIUI, Before installing Mi Fit, disable Battery Optimization for this application. Otherwise, the bracelet will lose communication through the device. 10-15 minutes after locking the screen.

Step-by-step instructions for synchronization with a smartphone

The process of connecting the Mi Band 4 to the phone takes no more than 5 minutes, but there are nuances that can delay the process.

1. Turn on the bracelet with a long press on the touch button (about 3 seconds), the Mi logo will appear on the screen.
2. Open the Mi Fit or Zepp Life app and create an account (if you haven't already done so), use a real email, which you'll need to recover your data.
3. Go to the Profile section → Add a device and select Mi Smart Band 4 from the list.
4. Allow the app to access notifications, contacts, and geolocation (the latter is needed for proper weather operation).
5. Wait for the show. QR-code on the bracelet screen and scan it through the application.

If the bracelet is not detected, try the following steps:

• 🔄 Reset the bracelet (press the button for 10 seconds before vibration)
• 📱 Reinstall the app and clear the Bluetooth cache on your smartphone
• 🔌 Connect the bracelet to charging for 5 minutes – sometimes a discharged battery blocks synchronization
• 🛠️ For Android: Enable Developer Mode and Activate Bluetooth Debugging in Settings

Once synchronized successfully, the bracelet will automatically update the firmware (if a new version is available). Do not interrupt the process, this can cause a malfunction of the heart rate sensor: 3-7 minute.

Set up the main parameters: time, notifications, alarm clocks

By default, the bracelet uses a 24-hour time format and a minimum set of notifications. To adapt it to your needs, go to the settings menu through the app:

The notification settings are particularly noteworthy, as the Mi Band 4 defaults to only show the first 10 characters of the message.

1. In Mi Fit go to Profile → Mi Band 4 → Notifications → Length of message
2. Select the full text option (not available for all languages)
3. For Android: In your phone settings, give Mi Fit permission to show over other windows

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If notifications come with a delay, add Mi Fit to the battery optimization exception list (on Android) or enable a background update (on iOS).

Alarm clocks available 3 Type of vibration: short (5 seconds, long (10 Seconds and surges (gradual increases in intensity), the latter being the most effective for deep sleep, but consuming a lot of time. 12-15% night-time.

Health Monitoring: Pulse, Sleep and Stress – How to Read Data

Mi Band 4 is equipped with an optical heart rate sensor PPG, It measures your heart rate every 5 minutes in normal mode and continuously during exercise, but the accuracy of the reading depends on the correct position of the bracelet:

• 🩺 Wear the bracelet on 2-3 finger
• 💦 Make sure the strap fits tightly (but does not crush the vein)
• ☀️ Avoid direct sunlight on the sensor during measurement
• 🚫 Do not measure your pulse immediately after eating or alcohol

The bracelet collects data about sleep automatically, but for accurate analysis you need to follow several rules:

1. Charge your bracelet to 100% before bedtime (minimum threshold for monitoring is 20%)
2. Don’t take it off at night – even a brief interruption will reset the statistics.
3. In the appendix, specify the approximate time of going to bed (Profile) → Son → Sleep time)

The Mi Band 4 algorithm distinguishes between 3 phases of sleep.

• 🌙 Deep sleep (20-25% Total time – critical to recovery
• 🌓 Light sleep (50-60%) — transitional
• 👁️ Up to 15% of waking up – awakenings you may not remember

⚠️ Note: If the bracelet shows less than 3 hours of deep sleep per night for a week, this may indicate chronic sleep deprivation or apnea.In this case, you should consult a sleep specialist - Mi Band 4 does not replace professional diagnostics.

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For the most accurate sleep analysis, combine the bracelet data with a self-observation diary: record the time of caffeine intake, stressful events and physical activity 3 hours before going to bed.

Fitness functions: training, pedometer and calories – how to get accurate data

Built-in Mi Band accelerometer 4 counts steps with error ±5-10% But in real life, mistakes can be made. 30-40%. Here's how to minimize inaccuracies:

For training, the bracelet offers 6 preset modes: running, walking, cycling, gym, swimming and other.

1. Scroll the bracelet screen to the right until the training icon
2. Select the right type of activity
3. Click on the icon to start counting.
4. At the end, press the button and save the results.

An important nuance: when swimming, the Mi Band 4 automatically recognizes style (brass, crawl, butterfly) only if you swim for at least 10 minutes in a row.

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To save battery power during long workouts (marathon, bike ride), turn off constant monitoring of the pulse in the settings of the mode.

Advanced Features: Music Management, Phone Search, and Secret Chips

In addition to its standard features, the Mi Band 4 can also act as a remote control for music and even help with presentations.

• 🎵 Music control: play/pause, next track, previous track (works with most players)
• 🔍 Phone search: bracelet makes phone vibrate and make sound (useful if lost gadget at home)
• 💡 Night mode: automatically turns off the backlight of the screen from 22:00 to 6:00
• 🔄 Quick answers: you can customize response templates on Android SMS straight off the bracelet
• 📊 Widgets: Mi Fit can add weather, calendar or promotion widgets (requires root on some firmware)

To manage presentations (PowerPoint, Google Slides) you will need additional software:

1. Install the Mi Band Master app on your phone (unofficial)
2. In the bracelet settings, activate the presentation management option
3. Connect the phone to the projector/monitor via HDMI Miracast
4. Use swipes on the bracelet screen to flip through slides

Another hidden feature is Do Not Disturb mode, which turns off all notifications and vibrations for a given amount of time.

Mi Fit Application → Profile → Mi Band 4 → Do not disturb

You can set the schedule (for example, from 21:00 to 7:00) or turn on manually through the bracelet (scroll down to the icon). 🌙).

Saving battery power: how to extend the life of the bracelet to 20+ days

Officially, the Mi Band 4 hold up 20 In practice, this period is reduced to 7-10 Here are proven ways to extend autonomy:

The most effective way is to combine the combination of turning off constant pulse monitoring and reducing the brightness. 90% function, but extend the autonomy to 14-16 days.

⚠️ Note: If the bracelet is discharged 2-3 For no apparent reason, check it for moisture under the body. Condensation can cause a short circuit in the battery. For prevention after showering or exercising, wipe the bracelet with a dry wipe.

For emergency charging (for example, before a marathon), you can use Power Bank with an output 5V/1A. The full charging cycle takes 1.5-2 Do not use charging with current more than one hour. 1.5A — This reduces the battery life.

Removal of malfunctions: what to do if the bracelet is glitzy

Even reliable equipment sometimes fails, and here are the typical Mi Band 4 problems and how to solve them:

• 🔄 Bracelet not synced: Reboot the bracelet (10 seconds of button holding) Remove the device in the application and add again Check if the antivirus does not block the connection with Mi Fit
• 📵 No notifications: In Android settings give Mi Fit Autostart permission Turn off Power Saving Mode for the app Check if the notification limit is exceeded (10 pcs in Mi Fit)
• 🩺 Imaculate pulse: Wipe the sensor with an alcohol napkin Wear the bracelet higher on your forearm during exercise Measure your resting pulse for calibration

The battery is fast running down:

1. Check the bracelet temperature – if it’s warming up, it’s a sign of a battery failure
2. Turn off unnecessary notifications and widgets
3. Update the firmware through Mi Fit

If the bracelet has stopped responding to the presses, but the screen is on, try resetting the settings to the factory:

1. Connect the bracelet to charging
2. Press the button 20 seconds before the Mi logo appears
3. Release the button and wait for the reboot.

After the reset, all data on the bracelet will be deleted, but the statistics in the Mi Fit app will remain if it was synchronized.

FAQ: answers to frequent questions about Xiaomi Mi Band 4