The Xiaomi Mi Band 4 fitness bracelet is one of the most popular wearables from the Chinese brand, released in 2019. Despite the fact that several years have passed since its release, this model is still in demand due to the optimal combination of price, functionality and quality. But what exactly is this gadget? Who is it suitable for and what tasks does it solve?
In this article, we’ll take a look at all the key features of the Mi Band 4, from specs to hidden features that many users don’t notice, how to set up the bracelet properly, what problems can arise in operation and how to solve them, and compare it with the newer models of the series to see if you should buy the Mi Band 4 in 2026.
Technical characteristics of Xiaomi Mi Band 4
Xiaomi Mi Band 4 This is a significant step forward compared to its predecessor, the Mi Band. 3. The main innovation is color AMOLED-diagonal 0.95 inch and resolution 120×240 The screen supports touch control and displays up to 40 000 The slates, which makes the interface more visual.
Under the hood, the bracelet is equipped with a 3-axis accelerometer and an optical heart rate sensor (PPG), which continuously monitors the pulse. The built-in 135 mAh battery provides up to 20 days of battery life (at standard settings).
- 📱 Compatibility: Android 4.4+/iOS 9.0+ (via Mi Fit app)
- 🏊 Water protection: 5 ATM (you can swim, but you can't dive)
- 📶 Connection: Bluetooth 5.0 BLE
- 🔋 Charging: magnetic USB-cable (2 hours to full charge)
It is important to note that the Mi Band 4 was released in two versions: standard and NFC (only for the Chinese market), the latter supported contactless payments via Alipay, but in Russia and Europe this feature did not work.
Main functions and capabilities
Xiaomi Mi Band 4 is positioned as a universal assistant for health and activity. Let's break down its key features in more detail.
1. Monitoring of activity
The bracelet automatically recognizes 6 activities: walking, running, cycling, gym, swimming and walking stairs. For more accurate data, you can manually start your workout mode in the Mi Fit app. A separate plus is counting burned calories based on weight, height and age of the user.
2.Sleep control
Sleep Monitoring analyzes sleep phases (deep, lung and REM) and captures wake-ups, and based on the data, the wristband gives recommendations for improving your rest, for example, if you sleep less than 7 hours, the app will suggest you lie down earlier.
3. Notification and management of music
Through Mi Band 4 you can receive notifications about calls, SMS and messages from messengers (WhatsApp, Telegram, Viber, etc.). Also, the bracelet can control the playback of music on a smartphone - switch tracks and adjust the volume.
4. Additional chips
- 🔍 Phone search: if the smartphone is lost, the bracelet will help you find it with vibration and sound signal.
- 🌞 Alarm clock: Vibratory awakening (helpful if you sleep with someone and don’t want to wake up with a sound).
- 📊 Energy Index: Estimates your daily activity on a scale from 0 to 100.
- 🔄 Automatic sync with Google Fit and Apple Health.
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To ensure that notifications are displayed correctly, in the Mi Fit settings, enable permission to access messages and contacts.
How to set up Xiaomi Mi Band 4: step-by-step instructions
The first activation of the bracelet takes no more than 5 minutes, but there are a few nuances that you should consider.
Step 1: Installation of the Mi Fit application
Download the official Mi Fit app from Google Play or the App Store.
- Sign up or sign in via your Xiaomi/Google/Facebook account.
- Press the + in the upper right corner and select the bracelet.
- In the list of devices, find the Mi Smart Band 4.
Step 2: Connecting the bracelet
Activate Bluetooth on your smartphone and follow the prompts in the app. When the bracelet vibrates, confirm the pairing on your phone.
- 🔄 Reset the bracelet (press the touch button for 10 seconds).
- 📱 Restart Bluetooth on your smartphone.
- 🔋 Make sure the bracelet is charged (the charge indicator should flash when connected to the device). USB).
☑️ Preparation for the Mi Band 4 setup
Step 3: Personalization
After connecting, configure:
- 🕒 Dial: in Profile → Mi Smart Band 4 → Select one of the preset dials or download custom through Amazfit Watch Faces.
- 🔔 Notifications: in Profile → Notifications Select the applications from which alerts you want to see.
- 💤 Sleep goals: Set your desired time to go to sleep and wake up.
How to reset Mi Band 4 to factory settings?
Xiaomi Mi Band 4 compared to other models of the series
To see if the Mi Band 4 is relevant in 2026, compare it to the newer Xiaomi bracelets, the main differences are in the table below:
| Characteristics | Mi Band 4 (2019) | Mi Band 5 (2020) | Mi Band 6 (2021) | Mi Band 7 (2022) |
|---|---|---|---|---|
| Display. | 0.95" AMOLED, 120×240 | 1.1" AMOLED, 126×294 | 1.56" AMOLED, 152×486 | 1.62" AMOLED, 192×490 |
| Autonomy | 20 days | 14 days | 14 days | 15 days |
| Sensor. SpO₂ | ❌ No. | ✅ There is. | ✅ There is. | ✅ There is. |
| GPS | ❌ No. | ❌ No. | ❌ No. | ✅ Connected (via phone) |
| Price (2026) | ~1 500 ₽ | ~2 000 ₽ | ~2 500 ₽ | ~3 000 ₽ |
The key advantage of the Mi Band 4 over the new models is the price: it is 2 times cheaper than the Mi Band 7 while maintaining basic functionality (SpO₂), big screen or extended sports modes, it is worth considering the more recent versions.
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Mi Band 4 is ideal for those who need basic fitness bracelet functions (stepmeter, pulse, notifications) without overpaying for bells and whistles.
Frequent problems and their solutions
Even a reliable device like the Mi Band 4 can sometimes fail, and let's look at the typical malfunctions and how to fix them.
1.The bracelet is not synchronized with the phone
If the data are not updated:
- 🔄 Reboot the bracelet and smartphone.
- 📱 Remove the device in Mi Fit and connect again.
- 🔋 Check if the battery is running out (at a charge level below 10%, the synchronization may not work).
2.The touch screen is not working
If the bracelet does not respond to touch:
- 🧼 Wipe the screen with a wet wipe (it may be fat or sweat on it).
- 🔧 Update the firmware through Mi Fit.
- 🔨 If the problem persists, contact the service center - the plume may have been damaged.
3. Battery discharges quickly
The life of the bracelet depends on the settings.
- ⏳ Reduce the brightness of the screen in Settings → Display.
- 🔔 Turn off unnecessary notifications.
- 📊 Turn off continuous pulse monitoring (just take a measurement every 30 minutes).
⚠️ Note: if the bracelet is discharged for 1-2 If you're not, you might be able to see a battery failure, and then you can only change the battery in the service center.
4. incorrectly counts steps or pulse
The accuracy of the sensors depends on the correct position of the bracelet.
- 📏 Wear the bracelet on 2-3 cm above the wrist (not too tight).
- 🏃 When walking, keep your hand relaxed - so the accelerometer better captures movements.
- 🩺 To measure your pulse, sit still for 5 minutes before the test.
How to extend the life of Xiaomi Mi Band 4: tips for care
With careful handling, the Mi Band 4 will last 3-4 years without serious breakdowns.
1. Protection against moisture
Although the bracelet has 5 ATM protection, that doesn't mean it can be submerged in water for long.
- 🚿 You can wash your hands, take a shower and swim in the pool.
- 🌊 Do not dive or use a bracelet in hot water (sauna, bathhouse).
- 💧 After contact with water, wipe the device with a dry cloth.
2. Care for the strap
Silicone straps lose elasticity over time and can cause skin irritation.
- 🧼 Once a week, wash the strap with soap solution.
- ☀️ Dry in the open air, but not under direct sunlight.
- 🔄 Change the strap once in a while. 1-2 (The cost of a new year is from the 300 ₽).
Charging and storage
The Mi Band 4 battery is sensitive to extremes of temperature and deep discharge.
- 🔋 Charge the bracelet at charge level 20-30% (don't get to full discharge).
- 🌡️ Avoid charging at temperatures below 0°C or higher than 40°C.
- 📦 Keep the bracelet in a dry place, away from magnets.
⚠️ Note: If the bracelet is not turned on after long storage, wait 10-15 Sometimes the battery takes time to wake up".