How to set up a smart watch Xiaomi Mi Band 4 NFC: from tether to contactless payments

Xiaomi Mi Band 4 NFC remains one of the most popular fitness trackers even years after its release. Their key advantage is support for contactless payments through the built-in NFC- chip, which favorably distinguishes the model from the base version without a module. However, many users face difficulties in the first setup, from problems with communication with the phone to errors when adding a bank card.

In this guide, we will take a step-by-step guide to activate the Mi Band 4 NFC, set up basic functions (stepmeter, notifications, alarm clocks) and solve common errors. Special attention will be paid to the configuration of NFC for payment through the World, Visa or Mastercard - there are nuances that are not written in the official documentation. If you have just unpacked the bracelet or want to reconfigure it after reset, this article will save hours on finding solutions.

1. Preparation for setting up: what to do before turning on the clock

Before you start syncing the Mi Band 4 NFC with your smartphone, make sure that three key conditions are met:

• 📱 Compatible smartphone: The watch runs Android 5.0+ or iOS 10.0+. On the iPhone, some features (such as responding to notifications) will be limited.
• 🔋 Battery charge: The bracelet must be charged at least 20 percent, and the first time it's turned on, it's more energy efficient than normal because of data synchronization.
• 📲 Mi Fit App: Download the latest version from Google Play or the App Store. Older versions may not support NFC- features.

Important: If you are upgrading from Mi Band 3 or another model, untie the old bracelet in Mi Fit to avoid connection conflicts. To do this, go to Profile → My Devices → Select the current bracelet → Untie.

⚠️ Warning: On iPhone, contactless payments via Mi Band 4 NFC only work with banks that support Apple Pay. Android is not limited to any card that supports NFC- payments.

2 First activation and tethering to the phone

The activation process of Mi Band 4 NFC takes no more than 5 minutes, if you follow the algorithm:

1. Turn on the bracelet: Click on the touch button below the screen and hold for 3 seconds until the Mi logo appears.
2. Select a language: swipe the menu up/down and tap Russian (or another language you want).
3. Activate Bluetooth on your phone and open the Mi Fit app.
4. Add the device: in Mi Fit, press + → Bracelet → Mi Smart Band 4 and follow the hints.

If the bracelet is not included in the appendix:

• 🔄 Reboot Mi Band 4 (hold the 10 seconds button).
• 📵 Make sure your phone is enabled with Bluetooth and Geodata (required for precise location timing).
• 🚫 Turn it off. VPN Proxies – they can block the connection to Xiaomi servers.

Make sure the bracelet is charged.

Enable Bluetooth and Geodata on your phone

Remove old devices from Mi Fit

Update the Mi Fit app to the latest version-->

Hidden function: If you have a “failed to connect” error when you link, try resetting the bracelet to factory settings. To do this, find Settings → Reset → Confirm (you need to hold the 5 seconds button).

3.NFC setup for contactless payments

The main difference between the Mi Band 4 NFC and the base model is the ability to link a bank card to pay in stores.

• 💳 Supported banks: Sberbank, Tinkoff, VTB, Alfa-Bank and others working with Mir Pay, Google Pay or Apple Pay.
• 📱 Android only: On the iPhone, the bracelet payment feature is locked at the iOS level.
• 🔒 Transaction limit: usually up to 1,000–3,000 ₽ per payment (depending on the bank).

Step-by-step instructions for linking the card:

1. Open Mi Fit and go to Mi Smart Band 4 → Contactless payments.
2. Select a bank from the list (for example, Sberbank) and click Add a card.
3. Enter the card data manually or scan it with the phone’s camera.
4. Confirm the binding via SMS or push notification from the bank.
5. Wait for the synchronization (it can take up to 10 minutes), and then the card icon will appear on the bracelet screen.

⚠️ Warning: If payments are not made after the card is tied, check: 🔋 Bracelet charge level (at least 15% is required for NFC). 📶 Internet connection stability on the phone (card data is updated via the cloud). 🔄 Update of the bracelet firmware (outdated versions may not support new banking services).

4. Configuration of notifications and calls

By default, the Mi Band 4 NFC shows notifications for calls, SMS and messaging, but they can be finely configured:

How to turn on/off notifications:

1. In Mi Fit, go to Profile → Mi Smart Band 4 → Notifications.
2. Activate the Call Notification and Notifications from the apps switch.
3. Select the apps you want to see on your bracelet (for example, WhatsApp, Telegram, Gmail).

Advanced settings:

• 📞 Call Deflection: On the bracelet, you can swipe an incoming call to the left (the feature only works on Android).
• 🔕 Silent Mode: In the settings of the watch (Settings → Do Not Disturb), you can set a period when the notifications will not vibrate.
• 📝 Message Preview: You can enable the display of notification text (up to 30 characters) in Mi Fit.

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If notifications are duplicated (both on your phone and on your bracelet), in the Mi Fit settings, turn off the option “Repeat notifications” to save battery life.

5.Tune fitness functions: pedometer, pulse, sleep

The Mi Band 4 NFC is equipped with sensors to track activity, but their accuracy depends on the correct calibration.

Stepper and distance:

• 👟 Step calibration: in Mi Fit, go to Profile → Settings → Step calibration. Walk 20 steps with your phone in your hand so that the bracelet remembers the length of your step.
• 🏃 Training modes: supported running, walking, cycling, swimming (waterproof bracelet up to 50 m). Choose the mode in the menu of the hours before the start of the class.

Sleep monitoring:

• 😴 Auto-tracking: By default, the bracelet captures sleep from 22:00 to 8:00. You can change the time in Mi Fit → Sleep → Settings.
• 📊 Phase analysis: shows deep, light sleep and wakes. Wear the bracelet on your non-working arm (usually your left arm) for accuracy.

Pulse measurement:

• ❤️ Automatic: Every 30 minutes (interval is configured in Mi Fit).
• ❤️ Manual: From the watch menu, select Pulse → Measure. Hold your hand still for 15-20 seconds.

⚠️ Warning: If the bracelet shows an unrealistically high or low pulse (such as 30 or 200 beats), remove it, wipe the sensor on the back with an alcohol wipe, and put on tighter (but don't squeeze).

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To accurately track sleep, wear a wristband on your arm that moves less while resting (usually the left for right-handed people).

6. Update firmware and reset settings

Regular firmware updates fix bugs, add new features (e.g. support for new banks for NFC) and improve stability. It is recommended to check the relevance of the software once in the 1-2 month.

How to update firmware:

1. Connect the bracelet to your phone via Mi Fit.
2. Go to Profile → Mi Smart Band 4 → Update firmware.
3. If a new version is available, click Update and wait until it is completed (the bracelet will reboot automatically).

Signs that an update is required:

• 🔄 The watch is spontaneously restarted.
• 💳 NFC- Payments do not work with a previously tied card.
• 📵 Phone connection is lost (app doesn't see bracelet)

Resetting to factory settings will help if:

• The bracelet hangs on the Mi logo.
• You can't tie a bank card.
• The settings disappeared after the update.

How to reset your settings:

1. On the bracelet, go to Settings → Reset.
2. Confirm the action by holding the button for 5 seconds.
3. After restarting, go through the binding procedure again (see Section 2).

7. Hidden functions and life hacks

The Mi Band 4 NFC has more than the manual says. Here are some useful tips:

• 🔦 Flashlight: Swipe down on the home screen and hold for 2 seconds, and the screen will light up white. Useful in the dark.
• 🎵 Music control: While playing a track on your phone, you can swipe songs across the bracelet screen (left/right – previous/next track).
• 🔍 Phone search: in the watch menu, select More → Find the phone – the smartphone will emit a loud signal (works even in silent mode).
• 🔋 Charge savings: Turn off automatic pulse measurement (in Mi Fit) and reduce screen brightness to 20% – this will extend the work up to 20 days.

How to change the dial:

1. In Mi Fit, go to Profile → Mi Smart Band 4 → Dials.
2. Choose your favorite design from the collection (there are animated options).
3. Click Sync to apply the changes.

The secret mode of the developer:

Additional settings are available for experienced users:

1. In Mi Fit, tap 10 times according to the application version (in the About section of the program).
2. Return to the main menu and the developer mode will appear.
3. You can turn on Log Data (for diagnostics) or Debugging Bluetooth.

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If the bracelet is slow to respond to touch, reset its settings and update the firmware, most often caused by the accumulation of cache after long use.

8.Typical errors and their solutions

Even after setting up properly, users face problems. Consider the most common:

If the bracelet is not activated:

• 🔌 Connect it to charge for 30 minutes (even if the indicator is not on).
• 🔄 Try another charger (faulty cable is a common cause).
• 🔧 If the screen remains black, reset (hold the 15-second button).

The error "Can't add a card":

• 💳 Make sure the card supports contactless payments (it must have the PayPass or PayWave logo on it).
• 📱 Check that the phone has the latest version of the banking app installed.
• 🔄 Reset the bracelet and try again.

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If you lose a feature (like NFC) after you update, reset the bracelet and re-attach it, which will return to work in 90% of cases.

FAQ: Frequent questions about Xiaomi Mi Band 4 NFC