Modern wearables are no longer just pedometers, becoming full-fledged tools for interacting with the world. Fitness bracelet Xiaomi Mi Band 4 was one of the first devices in the budget segment to receive the NFC module, which opened up new possibilities for users. However, the fact that the chip in the device does not mean that all functions will work automatically after being removed from the box.
Many owners have difficulty in initial setting up, not understanding why the bracelet does not see the card or does not respond to payment terminals. NFC-Labels can vary significantly from region to region, and in this article, we will detail how to properly configure the module to harness its potential to one hundred percent.
It's worth noting that the Mi Band 4 NFC is not just a wearable accessory, but a sophisticated device that requires proper software setup. Without proper training, you risk getting a device that will only show time and count steps, ignoring its unique capabilities. Let's figure out how to avoid typical errors and run all the necessary functions.
Verification of compatibility and device version
The first step before any manipulations will be to accurately determine the modification of your tracker. There are two main versions of the Xiaomi Mi Band 4 on the market: the regular and the NFC-enabled version. Visually, they are almost identical, but on the back of the model with a wireless module there is a special labeling "NFC" and contacts for charging, which look different.
If the case does not have a logo, software methods will not be able to activate the chip, because it is physically absent from the case. Make sure you own the modification that supports wireless communication. You can also check this through the official application, where the device information will indicate the full specification.
⚠️ Note: Trying to firmware the usual version of Mi Band 4 firmware from NFC-The model will cause the device to fail (brick). Always check the model before installing any software.
The global (Global) and Chinese (CN) versions have different software. The Chinese version often requires additional manipulation to work outside China, especially if it is a payment system. The global version is more versatile, but may have a stripped-down functionality in some services.
Installation and configuration of the Mi Fit application
The foundation for the bracelet management is the official Mi Fit app (now renamed Zepp Life). NFC-You need to download the current version of the application from Google Play or the App Store, avoiding third-party resources that may contain malicious code.
After installing the app, sign up or log in to your Xiaomi Account. Next comes the pairing process: turn on Bluetooth on your smartphone, click Add Device, and select your bracelet from the list. Follow the on-screen instructions, confirming the action with a vibration on your wrist.
- 📱 Make sure that the smartphone is on GPS Bluetooth for stable connection.
- 🔋 Charge the bracelet to at least 50% before setting up to avoid communication breakdown.
- 🔄 Update the bracelet firmware to the latest version through the Profile tab" → "Mi Band 4".
It is important to give the application all the permissions requested, including geolocation and notifications. Without these permissions, data synchronization and communication modules may be disrupted. Once successfully paired, the application interface will show the connection status and current battery power.
Activation of NFC and Adding Access Cards
The main feature that many people buy this model for is the ability to use the bracelet as a key. To get started, you need to go to the device profile in the Mi Fit application and find the Settings item. → NFC. Here you will see the option to add access cards that allows you to emulate the signal. RFID-marker.
The process of adding a card requires physical proximity. Hold the card you want to clone close to the back of the bracelet. The device reads the unique ID and tries to create a digital copy of it. It's worth remembering that 13.56 MHz cards are supported without hardware protection.
☑️ Check before adding a map
If the card is read successfully, it can be given a name, like "Home" or "Office," for ease of use, and then when you hold your wrist to the intercom reader, the bracelet will emulate the card signal. However, modern security systems often use encryption that cannot be copied by standard means.
⚠️ Note: Not all access cards can be copied, cards with Mifare DESFire chips or other types of encryption bracelet will not count, it will show an error or simply ignore the card.
Use of a bracelet to pay
Payment via Xiaomi Mi Band 4 requires a separate explanation, as the functionality depends on the region. In Russia and CIS countries, direct payment via Google Pay or Apple Pay from the bracelet is not supported due to the lack of appropriate security certificates in global and Chinese firmware for these payment systems.
However, Xiaomi Pay, which is linked to local bank cards (UnionPay), is active in China, and there are workarounds for users from other countries, such as using virtual cards of certain payment systems that support tokenization for wearable devices, but this requires deep technical tuning and is not guaranteed by the manufacturer.
Can Google Pay work on Mi Band 4?
If your goal is to pay, consider newer models or specialty payment rings that have the necessary certificates. NFC-For the Mi Band 4, this feature remains declarative for most users outside of China.
Integration with a smart home and music management
In addition to access and payment, the NFC module in the bracelet can be used for smart home scenarios. While NFC itself does not control devices directly from a distance, it can serve as a trigger. For example, by holding the bracelet to a special NFC tag placed at the entrance, you can run a script in the smart home application.
You can also use the app to set up music control on your smartphone, and the bracelet acts as a remote control, allowing you to switch tracks, pause or change the volume, which is convenient during training, when you don't want to take your phone out of your pocket or bag.
| Function | Support to RF/CIS | Internet is required | Stability of work |
|---|---|---|---|
| Copying keys (13.56 MHz) | Yes (partially) | No. | Tall. |
| Payment (Mi Pay) | No (China only) | Yes. | Low. |
| Managing music | Yes. | No. | Tall. |
| Unlocking the laptop | Yeah (via software) | No. | Medium |
Complex smart home scenarios often require a gateway or hub that connects the bracelet and other appliances in the apartment. Xiaomi’s ecosystem allows for automation where the bracelet acts as one of the elements of the chain of events.
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Use the free ones. NFC-Labels to create physical buttons for your smart home, stick a label on the wall and set the Mi Home app to say, "When you touch the tag, turn off the lights and turn on the humidifier.
Typical problems and ways to solve them
In the process of operation, users may encounter a number of technical difficulties. Often the bracelet stops seeing the card when trying to copy. In this case, try changing the angle of inclination or the pressing density. Sometimes it helps to remove the silicone strap, which can create an additional distance between the chip and the reader.
Another common problem is data desynchronization. If the bracelet does not update the status of the cards or does not respond to the application commands, try to completely reset the device. To do this, find the item "Reset" in the bracelet menu or use the "Untie the device" function in the Mi Fit application, and then pair again.
- 🔌 Reboot your smartphone and bracelet to clean up temporary Bluetooth caches.
- 📶 Make sure that the Mi Fit application does not include energy saving mode for background processes.
- 🗑️ Remove old, unused cards from the bracelet memory to make room.
If the problems persist after all the manipulations, it may be the hardware malfunction of the module. NFC-In such cases, you need to contact a service center or replace the device if it is guaranteed.
⚠️ Note: When you reset the bracelet settings, all the cards and data stored in its memory will be deleted. You will have to re-add the card to the application.
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Stable NFC operation depends not only on the bracelet itself, but also on the firmware version and the Mi Fit app. Regularly update the software to fix known bugs.