NFC Xiaomi Mi Band 4: How to turn on, configure and use

Fitness bracelet Xiaomi Mi Band 4 NFC became one of the first wearable devices of the brand with support for wireless technology NFC — It's still relevant for paying for purchases, unlocking doors, or transferring data, but many users have difficulty first turning on the module: where to look for settings, how to link a bank card, and why the feature may not work. In this article, we will discuss all the ways of activation. NFC taking into account the latest updates of 2026, and also reveal the nuances that are not written in the official instructions.

It is important to understand that Mi Band 4 NFC It was released in several versions: for the Chinese market (with support for Mi Pay) and the global version (with limited functionality), which depends not only on the configuration process, but also on the list of available options. We will consider both options, and also give recommendations for choosing firmware and solving typical errors - from the lack of a menu item to problems with linking cards.

If you have just purchased a bracelet or updated your firmware, but can’t find the option NFC — Don't panic. 90 percent of the time, you can fix the problem by adjusting your regional settings or changing your Mi Fit app. And for those who want to maximize the potential of the device, we've developed a unique way to activate hidden features. NFC through the engineering menu (works on firmware up to version 1.0.9.54).

What is NFC in Xiaomi Mi Band 4 and why you need it?

Technology NFC (Near Field Communication in Mi Band 4 is implemented through an integrated chip that allows the bracelet to communicate with other devices at a distance of up to 10 cm:

• 💳 Contactless payments: Bank card binding (in China – through Mi Pay, in Russia – through SberPay or World Pay after manual setting up).
• 🚪 Smart locks: unlocking doors in offices, entrances or hotels (access control system support required).
• 📱 Fast data transfer: exchange contacts, links or settings with other Xiaomi devices (e.g. smartphones) MIUI).
• 🎫 Transport cards: in some regions, the bracelet can be used as a travel ticket (for example, Troika in Moscow after being tied through third-party services).

The difference between Mi Band 4 NFC from the standard version - the presence of an additional chip NXP PN54T, But it's very dependent on firmware and regional constraints, and for example, the global version has defaulted on payment, but it can be activated via Mi Fit or alternative firmware.

It's important: NFC In the bracelet, it is passive – it cannot initialize the connection itself (unlike smartphones), which means that to pay for or unlock the door, you need to bring the bracelet to the reader, not vice versa.

Preparation of the bracelet for activation NFC: Version and Region Version

Before inclusion NFC You need to make sure your Mi Band 4 supports this feature, and also configure the correct region in the Mi Fit app:

The first thing you need to do is check the markings on the back of the bracelet or box. NFC If you don't have one, your model doesn't support the technology, and you don't have to do anything else.

Next, update the bracelet firmware through Mi Fit:

1. Open the application and go to the Profile section → Mi Smart Band 4.
2. Slip on three dots in the top right corner and select Firmware Update.
3. If a new version is available, install it (the bracelet must be charged at least 50%).

The critical moment is the choice of region. The default is the global version. NFC It's off, so it can be activated:

1. In Mi Fit, go to Profile → Settings → Region.
2. Choose China.
3. Reset the bracelet (press the touch button for 10 seconds).

After changing the region, you may need to re-assign the bracelet to your account, and if the process is stalling, remove the device from Mi Fit and add it again.

Step-by-step instruction: how to turn on NFC on Mi Band 4

When you're done, you can start activating the module, and the instructions vary depending on the firmware version and the region, and we'll look at both.

Method 1: Through the official Mi Fit app (for Chinese firmware)

If your bracelet is originally intended for the Chinese market or you have switched from a region to China, follow these steps:

1. Open the Mi Fit and go to the bracelet management section.
2. Pay for contactless payments (or Mi Pay).
3. Click Add Card and select type (bank card, transport card or access key).
4. Follow the instructions on the anchor screen (maps data entry and confirmation via SMS).

After the successful binding, the card icon will appear on the bracelet screen to pay for the purchase:

1. Wake up the bracelet with a double tap.
2. Slide down to the badge. NFC (card).
3. Bring the bracelet to the terminal at a distance of 1-3 cm.
4. Wait for the vibration and the beep to signal a successful payment.

Method 2: Through the Engineering Menu (for global firmware)

If there is no contactless payment option in Mi Fit, but you are sure that the bracelet supports NFC, You can try activating the function through a hidden menu. This method works on firmware up to 1.0.9.54:

1. On the bracelet, go to Settings → About the bracelet.
2. Slip 5 times in a row on the wording "Firmware version" until the message "Engineering menu unlocked" appears.
3. Go back to the main menu and find the new Engineer Mode.
4. Choose. NFC Test → Enable NFC.
5. Reset the bracelet.

After that, Mi Fit should have a section to set up payments, and if not, try changing the region to China and repeat the procedure.

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If the engineering menu doesn’t open, try updating your firmware to 1.0.9.54 via third-party tools like Mi Band 4 Tools (available on the Internet). 4PDA).

Method 3: Through third-party firmware (for power users)

If the official methods did not work, you can install custom firmware with unlocked NFC. Popular options:

• 🔧 Mi Band 4 Custom Firmware (from the community) 4PDA) — Supports Google Pay and transport cards.
• 🌍 Amazfit Mod – firmware from Huami with advanced features NFC.

Installation instructions:

1. Download the firmware from a verified source (for example, topics on the 4PDA).
2. Install the Mi Band 4 Tools or Notify & Fitness utility on your smartphone.
3. Connect the bracelet to your PC via an adapter (or use a Bluetooth bridge).
4. Download the firmware through the utility and wait for the reboot.

⚠️ Note: Installation of unofficial firmware may lead to loss of warranty and unstable operation of the bracelet.

Bank card binding: supported systems and limitations

One of the main functions NFC Mi Band 4 offers contactless payments, but there are a number of nuances that depend on the region and the bank.

In China, the bracelet supports Mi Pay, an Apple Pay equivalent that works with most local banks, and in Russia and Europe, the situation is more complicated:

To link the SberPay card:

1. Open the SberBank Online app.
2. Go to the Maps section → Mi Band.
3. Select a map to link and confirm the operation with a code from SMS.
4. Wait for synchronization with the bracelet (can take up to 5 minutes).

⚠️ Note: Some banks block card binding to wearable devices due to increased fraud risks. If the card is not tied, contact the bank and check if payments are allowed through Mi Band 4.

Common NFC Problems and Solutions

Even after successful activation, users often encounter errors in use. NFC. Let’s look at typical scenarios and ways to eliminate them.

Problem 1: NFC Not included or not on the menu

Possible causes and solutions:

• 📱 The Wrong Region in Mi Fit → Change to China and reset the bracelet.
• 🔄 Outdated firmware → Update the bracelet via Mi Fit or manually.
• 🛠️ Hardware malfunction → Check the bracelet on another smartphone or contact the service.
• 🔒 Blocking by the operator → Some mobile operators restrict their work NFC In wearable devices (relevant to the SIM-bank-related cards).

If contactless payments are not available even after the region change, try:

1. Remove the bracelet from the Mi Fit and add it again.
2. Install an older version of Mi Fit (e.g. 4.6.0 – known for stable operation with the Mi Fit) NFC).
3. Reset the bracelet to factory settings (Settings → Reset).

Problem 2: The bracelet is not readable by the terminal

If NFC included, but no payment is made:

• 🔋 Low battery charge → Charge the bracelet to 100% (NFC power-consuming).
• 📶 Weak signal. → Bring the bracelet closer to the reader (optimal distance - 1-2 cm).
• 🔄 Conflict with other devices → Turn it off. NFC on a smartphone while paying with a bracelet.
• 🛡️ Protective film/case → Metal or thick silicone cases can shield the signal.

Also check if the terminal supports payments from wearables. Some older models only work with smartphones.

Problem 3: Card is tied, but payment does not pass

Frequent causes:

• 💰 Insufficient resources → Check the balance of the card.
• 🔒 Bank lockdown → Some banks require confirmation of each transaction through SMS (bracelet-incompatible).
• 🌍 Regional limitation → Some banks do not work abroad.
• ⏱️ Card expiration date → Update map data in Mi Fit.

If the problem persists, try:

1. Remove the card from the bracelet and tie it back.
2. Contact the bank to check the status of the card (possibly included option "Ban contactless payments").
3. Try payment at another terminal (e.g., another store).

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If the bracelet vibrates when you bring it to the terminal, but the payment does not pass, the problem is most likely on the bank or terminal side, not the device.

Hidden functions NFC Mi Band 4: What else can you do?

Besides payments, NFC Mi Band 4 allows you to use the bracelet for other tasks:

1. Unlocking smart locks

The bracelet can be programmed as a key to:

• 🏢 Office doors (systems) HID or Mifare).
• 🏠 Domophones (requires support from the management company).
• 🚗 Car alarm systems (e.g. Pandora or StarLine with a NFC-marker).

To set up:

1. Check with the access control administrator if wearable devices are supported.
2. If yes, you will receive a unique identifier (UID) for your bracelet.
3. Program it through special software (for example, NFC Tools for Android).

2. Transfer of contacts and links

Between Xiaomi devices, you can quickly exchange data:

1. Activate. NFC bracelet.
2. On your smartphone, open the contact or link you want to send.
3. Select the option to share through NFC.
4. Bring the bracelet to the back of the smartphone (to the area). NFC-antennae).

This method works with devices on MIUI 12+.

Emulation of transport cards

In some regions (for example, Moscow, St. Petersburg) Mi Band 4 can be used instead of Troika or Strelka.

1. Install the Metro app NFC Transport Card (available on the 4PDA).
2. Download the transport card dump (for example, from forums).
3. Write it down on the bracelet through the engineering menu or NFC Tools.

⚠️ Note: Using unofficial transport card dumps may be considered fraud. Before recording, please check the legality of this method in your area.

Security: How to Protect Data NFC bracelet

NFC Wearable devices are vulnerable to several types of attacks:

• 🕵️ Skimming – interception of card data by fraudulent terminals.
• 🔄 Replay Attacks – Reuse of the intercepted signal.
• 📱 Unauthorized access – if the bracelet is lost or stolen.

To minimize the risks:

• 🔒 Turn it off. NFC, When not using (in bracelet settings).
• 🛡️ Use it. PIN-code for unlocking the bracelet (Settings) → Lock screen).
• 📱 Set up payment notifications in the banking app.
• 🔄 Regularly update the firmware – Xiaomi closes vulnerabilities in new versions.

If the bracelet is lost:

1. Remove the attached cards immediately via Mi Fit or the banking app.
2. Disconnect the device from your Xiaomi account (Profile) → Mi Smart Band 4 → Remove the device).
3. If you used a transport card, block it through the carrier’s website.

Dynamic protection can be used for additional protection. CVV-In this case, a unique code will be generated for each transaction, making the cloning of the card useless.

FAQ: Answers to Frequent Questions