Modern wearables have become an integral part of life, and Xiaomi’s fitness tracker is a market leader. The Mi Smart Band 4 with NFC module attracts users not only with its stylish design and bright display, but also with the ability to pay for purchases by public transport.
The pairing process often raises questions for beginners, especially when it comes to activating contactless payments. Mistakes at this stage can lead to the card not being read by the terminal, or notifications not coming at the wrist. In this article, we will detail how to connect the bracelet to a smartphone, configure the necessary applications and activate functions for comfortable use.
It’s worth noting that the NFC version has different shell features than the standard model. To work properly, you’ll need a stable Internet connection and an installed Mi Fit app (or its current Zepp Life counterpart).
Preparation for the first launch and requirements
Before you try to connect the gadget with the smartphone, you need to make sure that the device is compatible and all the components are available. Your phone’s operating system should be no lower than Android 5.0 or iOS 10.0, otherwise the application will simply not install or work incorrectly. It is also important that the phone has Bluetooth and geolocation detector turned on, as these are mandatory requirements for finding the device.
The tracker itself should be charged at least 20-30%. If you take the device out of the box and it doesn't respond to touch, put it on charge for 15-20 minutes. Often new gadgets come with a fully discharged battery, and the battery indicator may not light up immediately after connecting the cable.
The critical point is choosing the right software. The NFC version in some regions (especially China) requires a special version of the app or switching the region in settings. If you use the global version, there should be no problems, but the payment operation may require a Mi Pay app or bank software that supports card tokenization.
⚠️ Note: Before setting up, delete old tracker profiles from the Mi Fit app if you have previously used Xiaomi bracelets.This will help avoid Bluetooth address conflicts and data synchronization errors.
Make sure your smartphone has enough free space, and while the app itself weighs a little, it requires space to store activity history, maps, and firmware updates, and check if there is free space in the device’s memory to caching access cards.
Installation and configuration of the Mi Fit application
The main tool for managing your Mi Band 4 is the Mi Fit app (now often called Zepp Life), which can be downloaded from official Google Play stores or the App Store. APK-files from questionable resources, as this can lead to the leakage of personal data or the installation of malicious code.
Once installed, start the program and register an account, you can use your phone number, email address, or log in through social media accounts (WeChat, Facebook, Google), and you must create an account, since all statistics are stored in the Xiaomi cloud, not just in the phone’s memory.
- 📲 Go to the Bluetooth settings on your phone and make sure the module is active and visible to other devices.
- 📍 Turn on geolocation (GPS) In the notification curtain, otherwise the application will not be able to find the bracelet.
- 🔋 Bring the bracelet close to the smartphone (distance no more than) 1-2 meters).
- 👆 Click the "Profile" button in the bottom menu of the application, then select "Add device" →"Bracelet".
When the app starts searching, the tracker screen will show a vibration and prompt you to confirm pairing. Press the touch button on the bracelet screen to confirm the action. The phone may also request permission to access notifications and contacts — agree with all the points for full operation.
Step-by-step instructions for connecting the bracelet
The pairing process usually takes less than a minute, but requires care. If you are using an NFC version, make sure that the Mi Smart Band 4 NFC is displayed in the list of devices found, not the regular version.
Once paired successfully, the app will offer firmware updates, which is an important step: newer versions of firmware often contain Bluetooth stack bug fixes and improve stability. NFC-Do not interrupt the upgrade process and keep the bracelet near the phone.
☑️ Checklist of successful connection
You'll be asked to adjust the dial during the setup process, and you can choose from the standard options or download a custom background from the gallery. The NFC version will also require you to adjust the map display if you plan to use them for payment or subway passage.
If you encounter a “Device is busy” or “Unable to connect” error during pairing, try the following:
- 🔄 Reboot your smartphone and bracelet (in bracelet settings, select Untie, then start searching again).
- 🗑️ Remove the device from the Bluetooth list in your phone settings.
- 📡 Disable other Bluetooth devices that may interfere.
- 📲 Check whether the phone is not "airplane" or energy saving, blocking background work.
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If the bracelet is not there, try restarting Bluetooth on your phone: turn off, wait 5 seconds and turn on again. This helps reset the connection stack.
Activation and configuration of the NFC module
The most popular feature of this model is the ability to pay and pass through turnstiles. To activate NFC in the Mi Fit application, go to the device profile and find the "NFC" item. Here you will see the status of the module and the ability to add maps. That the functionality depends on the region: the Chinese version supports maps of the transport systems of China, and the global one can be limited or require a change of region.
To add a card, click Add Card and follow the instructions on the screen. You need to enter your credit card details or your transport passes card details. The tokenization process creates a virtual counterpart of your card that is stored in a secure bracelet chip. The real card data is not transmitted when you pay.
| Type of card | Support | Region of release | Commission for issuance |
|---|---|---|---|
| Transport (Single) | There is. | Russia/CIS | Depends on the operator. |
| Banking (Mir/Visa/MC) | Limited. | Globally | Free of charge. |
| Office pass (125 kHz) | No (only 13.56 MHz) | N/D | N/D |
| Student card | Partially. | Depends on the university. | Depends on the university. |
It's important to understand the frequency difference. The module in the Mi Band 4 runs at 13.56 MHz. Old access systems that use 125 kHz (a common plastic key fob card) can't count. Check the specification of your access card before trying to clone.
⚠️ Note: When adding a transport card, the balance may be temporarily frozen or the cost of issuing a virtual card will be charged.
Once you add the card, it becomes active by default, you can switch between several added cards directly in the wristband menu or through the app. To pay, simply hold your wrist to the terminal - you do not need to unlock the phone screen.
Why is the intercom key not copied?
Solving problems in synchronization
Even when set up correctly, there can be failures. One of the common problems is disconnection. If the bracelet constantly loses touch with the phone, check your energy saving settings. Android systems often kill Mi Fit background processes to save charge, which leads to loss of heart rate and step data.
Add the app to battery exceptions and allow auto-run. Also make sure that Bluetooth and geolocation rights are in "Always" or "Allowed" mode. Without this notification, messengers may be late or not coming at all.
Another problem is the inability to update NFC cards. This is often due to unstable Internet or locking Xiaomi servers, in which case, try changing the network (from Wi-Fi to mobile Internet) or using a VPN if servers are not available in your region.
- 📶 Check the speed of the Internet connection on your smartphone.
- 🔒 Make sure that the antivirus does not block the Mi Fit application.
- 📱 Update the app to the latest version through the official store.
- 🔋 Charge your bracelet to at least 50% before major upgrades.
If nothing works, reset the bracelet to factory settings through the device menu (System → Reset) and then re-attach it as a new device, which helps to eliminate firmware errors accumulated during operation.
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The stability of NFC and notifications depends on the power saving settings of the smartphone. Add Mi Fit to the "Lean Mode" exceptions for permanent communication.